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Sifuentes Giraldo, María J. García Villanueva, Alina L. Boteanu, Ana Lois Iglesias, Antonio C. Zea Mendoza" "autores" => array:5 [ 0 => array:2 [ "nombre" => "Walter A." "apellidos" => "Sifuentes Giraldo" ] 1 => array:2 [ "nombre" => "María J." "apellidos" => "García Villanueva" ] 2 => array:2 [ "nombre" => "Alina L." "apellidos" => "Boteanu" ] 3 => array:2 [ "nombre" => "Ana" "apellidos" => "Lois Iglesias" ] 4 => array:4 [ "nombre" => "Antonio C." "apellidos" => "Zea Mendoza" "email" => array:1 [ 0 => "azea.hrc@salud.madrid.org" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">¿</span>" "identificador" => "cor0005" ] ] ] ] "afiliaciones" => array:1 [ 0 => array:1 [ "entidad" => "Servicio de Reumatología, Hospital Universitario Ramón y Cajal, Madrid, Spain" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "titulosAlternativos" => array:1 [ "es" => array:1 [ "titulo" => "Nuevas dianas terapéuticas en el lupus sistémico (parte 2/2)" ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Inhibition Survival Factor B</span><p id="par0005" class="elsevierStylePara elsevierViewall">The second way to deplete B cells is the inhibition of differentiation and survival of these cells, APRIL and BLyS, also known as BAFF (<span class="elsevierStyleItalic">B cell activating factor</span>), 2 cytokines of the TNF superfamily. BLyS may bind 3 different receptors on the surface of B lymphocytes (BL), the receptor for BLyS (BLySr or BR3), TACI (<span class="elsevierStyleItalic">transmembrane activator and calcium modulator ligand interactor</span>) and <span class="elsevierStyleItalic">BCMA</span> (<span class="elsevierStyleItalic">B cell maturation antigen</span>); APRIL may bind only 2: TACI and BCMA. Both BLyS and APRIL promote B cell differentiation and survival and their inhibition leads to B cell depletion, fundamentally apoptosis, and a reduction in antibody production.<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> 3 specific inhibitors of BLyS have been developed (belimumab, AMG-623 and briobacept) and a fusion protein, atacicept, which inhibits both BLyS and APRIL.<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Belimumab</span> (Benlysta<span class="elsevierStyleSup">®</span>, LymphoStat-B<span class="elsevierStyleSup">®</span>). Is a completely human monoclonal antibody that inhibits the biological activity of BLyS (BAFF). Although its mechanism of action is not completely understood, it seems to inhibit the stimulation of BL and reestablish the potential for autoreactive BL to suffer apoptosis. Therefore, a reduction in circulating BL is achieved, though less profound and prolonged than that produced by anti-CD20.</p><p id="par0015" class="elsevierStylePara elsevierViewall">Clinical development of belimumab has passed through 2 stages: a phase II initial stage carried out in 449 patients with non renal and non neurological SLE, including 28% with negative ANA, which did not find differences in SLEDAI variations or the number of flares when compared to placebo<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a>; however, a second, <span class="elsevierStyleItalic">post hoc</span> analysis that excluded patients with negative ANA and found a new response index, SRI (SLE response index)—defined by an improvement<span class="elsevierStyleHsp" style=""></span>≥4 points on the SLEDAI, no new BILAG 1A/2B and no worsening of the global evaluation by the physician—established that patients with positive ANA SLE treated with standard therapy plus belimumab for 5<span class="elsevierStyleHsp" style=""></span>years had a sustained improvement of SLE, a reduction in the frequency of flares (including severe flares) and a reduction in autoantibody levels, without an increase in adverse events. These new results sustained the development of two ambitious phase III trials, one with a 52-week evaluation of 865 patients (BLISS-52) and another lasting 76<span class="elsevierStyleHsp" style=""></span>weeks including 826 patients (BLISS-76), finding improvement, although not overtly superior, compared to placebo (57% vs 43%), but with an important change in immunologic parameters, normalization of hypergammaglobulinemia and a significant reduction on autoantibodies. This led to its approval by the FDA in March 2011 as a treatment for SLE in combination with standard therapy, thus becoming the first drug approved for the treatment of this disease since 1957.<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Briobacept</span> (BR3-Fc). It is a recombinant glucoprotein formed by 2 molecules from the BLyS receptor (BR3) joined to the Fc domain of human IgG1. BR3-Fc binds BlyS (BAFF) but not APRIL. Experimental studies in monkeys showed an effect by BR3-Fc in B cell subpopulations: CD21<span class="elsevierStyleSup">high</span>, homologous to human marginal zone B cells and naïve B cells, which suffered more depletion than memory B cells. A yet unpublished trial in human SLE has been performed.</p><p id="par0025" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Atacicept</span> (TACI-Ig). TACI-IgG is a recombinant fusion protein that simulates the soluble TACI receptor and blocks activities of both BLyS and APRIL. Preclinical modeling showed that atacicept produces a profound depletion of plasma cells, something that led to the development of phase I trials with results in line to what would be expected by their mechanism of action, in addition to having a comfortable subcutaneous weekly administration.<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> A phase II clinical trial in combination with mycophenolate mofetil for the treatment of LN was suspended due to an increased number of infections. However, a phase III trial for non-renal SLE is underway (APRIL-SLE).</p><p id="par0030" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">AMG 623</span> (blisimimod). Is a <span class="elsevierStyleItalic">peptibody</span> (a hybrid of a small peptide and an antibody) that acts as a decoy of BLyS, binding it and impeding the interaction with its receptor on B cells, with a phase II trial underway.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Inhibitors of T Cell Costimulation</span><p id="par0035" class="elsevierStylePara elsevierViewall">Production of autoantibodies by B cells requires activation and collaboration of T lymphocytes (TL) and this activation needs at least two signals from antigen presenting cells (APC). The so-called “first signal” takes place through the recognition of antigen on the part of the T cell receptor (TCR), when the former is presented to it in the context of the major histocompatibility complex of the APC. After this signal, the TL expresses a CD28 molecule on its surface, which interacts with its ligands B7-1 (CD80) and B7-2 (CD86), present on the surface of APCs, constituting a “second signal” CD28/B7, which completes T cell activation. Following this second signal, the TL proliferates, differentiates, produces cytokines and expresses new costimulation molecules on its surface which interact with their corresponding ligands on the APC, and give rise to a succession of inhibitory and stimulatory signals that have the objective of controlling the effector actions of TL. However, CD28/B7 interaction not only sends costimulatory signals to the TL, but also to the APC, which receives feedback and, as would occur on the TL, responds with the expression of successive inducible ligands on its surface and the synthesis of cytokines, IL-6, among others, a cytokine known for its direct or indirect “inflammatory” profile acting through the differentiation of naïve Th17 T cells. Therefore, inhibition of costimulatory molecules has multiple consequences on immunity and is the motive that these molecules are under intense research as therapeutic targets. Among the receptor/ligand sets, some have agonist actions, such as the above mentioned CD28/B7 or those formed by CD40/CD40L, ICOS/ICOS-L, OX40/OX40L and 4-1BB/4-1BBL, and some have an inhibitory effects, such as CTLA-4 (cytotoxic T lymphocyte antigen 4), also known as CD152, with B7-1 and B7-2, which inhibit or attenuate the autoimmune process.<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a></p><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">CD28-B7-1/B7-2 Blockage</span><p id="par0040" class="elsevierStylePara elsevierViewall">After the first signal, the expression of CD28 is induced on TL, which will interact on its ligands B7-1 (CD80) and B7-2 (CD86), present on the APC; the resulting intracellular signaling cascade has an agonist effect that leads to the activation of transcription factors that will culminate in the expression of IL-2 and TL proliferation.</p><p id="par0045" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Anti-CD28</span> (TGN1412). The initial strategy to block costimulation via CD28 consisted in the administration of a monoclonal anti-CD28 antibody, with the intention of inhibiting its binding to its natural B/family ligands; however, anti-CD28/CD28 binding had a potent agonist effect on TL, with massive production of cytokines which led to a severe systemic reaction and multiorganic failure, a phenomenon called a “cytokine storm” which led to research into this drug being suspended.<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">CTLA4-IgG</span> (abatacept, Orencia<span class="elsevierStyleSup">®</span>). Better known for its use in RA, it is a fusion protein that combined an extracellular domain of CTLA-4 bound to the Fc fragment of human IgG1. Abatacept binds B7-1(CD80) and B7-2(CD86), with greater affinity than for CD28 and acts as a competitive inhibitor of the CD28/B7 interaction, impeding T cell costimulation through CD28 and, therefore, signaling that would lead to T cell proliferation and the production of cytokines; the consequence is that the T cell becomes anergic or apoptotic. The only phase II study in SLE with abatacept did not attain the proposed objectives which were a reduction in the number of flares, time to the appearance of a flare and the number of flares while treated with steroids; in addition, adverse events were more frequent in the active arm than in the placebo arm.<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> However, a post hoc analysis in which the definition of flare was modified from a new BILAG A or B a to only a new BILAG A, managed to reduce the number of flares significantly compared to the placebo group. This led researchers to propose a new trial, in relation to LN, which is underway.</p><p id="par0055" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Belatacept</span> (LEA29Y). A molecule with the same principle as abatacept, of which it can be considered a modification; it offers the advantage of having much higher affinity for its ligands B7-1 and B7-2. It has been tried out in RA but not in SLE.</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">CD40/CD40L Blockage</span><p id="par0060" class="elsevierStylePara elsevierViewall">The interaction of CD40, a molecule expressed on BL, dendritic cells and other APCs, with its ligand CD40L (CD154, gp39), expressed on activated T CD4 and T CD8 and NK cells, among others, is essential in generating a B cell dependent T cell response. This costimulating pair transmits signals both for T cells and APC that express B7 and, therefore, leads to T cell proliferation. As a consequence, the interruption of CD40/CD40L costimulation is a therapeutic strategy that has been attempted with 2 anti-CD40L monoclonals: ruplizumab, toralizumab and ABI 793.</p><p id="par0065" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Ruplizumab</span> (BG9588). It was in a small trial with 28 LN type IV patients, interrupted due to a high incidence of thromboembolic events and myocardial infarctions, pulmonary embolus and strokes, including one death. The analysis of the results at the moment of interruption showed a reduction in hematuria and the anti-DNA titer, as well as an increase in C<span class="elsevierStyleInf">3</span>.<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a></p><p id="par0070" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Toralizumab</span> (IDEC-131, E6040, anti-gp39). A clinical trial of toralizumab vs placebo in mild to moderate SLE found no thromboembolic events but neither did it find clinical efficacy.<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> The development of the drug was abandoned after a patient in a Crohn's disease trial suffered a thromboembolic event.</p><p id="par0075" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">ABI 793</span>. Once again, cardiovascular events were responsible for stopping the development of this completely humanized monoclonal antibody, suggesting that thromboembolic complications are a class effect of anti-CD40L antibodies.</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">OX40/OX40L and ICOS/ICOS-L Blockage</span><p id="par0080" class="elsevierStylePara elsevierViewall">OX40 is expressed on T cells while OX40L does so on dendritic cells, B cells and macrophages. OX40/OX40L stimulates proinflammatory cytokine secretion on the part of APC. A phase II trial is currently underway with an anti-OX40L antibody in patients with asthma, but no trials exist for SLE.</p><p id="par0085" class="elsevierStylePara elsevierViewall">The interaction of ICOS, a molecule expressed on T cells, with ICOS-L (CD275), expressed mainly on B cells, leads to the synthesis of IL-4 and IL-10. ICOS/ICOS-L blockage is currently being tested with an anti-ICOS-L antibody (AMG 557) in a phase I trial with lupus patients.</p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Adhesion Molecules</span><p id="par0090" class="elsevierStylePara elsevierViewall">Binding between the TCR and the APC is highly specific, but with low affinity and the stabilization of this binding is carried out through cellular adhesion molecules (CAM), which have also been considered as therapeutic targets for autoimmune diseases, although none have been tested in SLE.</p><p id="par0095" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Efalizumab</span> (Raptiva<span class="elsevierStyleSup">®</span>). Efalizumab is an anti-LFA1 monoclonal antibody that inhibits ICAM1/LFA1 interaction. Because LFA1 mediates binding of leukocytes to the endothelium, and their subsequent margination into tissues, treatment with anti-LFA1 should lead to a reduction in inflammatory cell infiltrates in tissues. Efalizumab was even approved for the treatment of plaque psoriasis, but the EMEA suspended its sale in Europe because it produced progressive multifocal leukoencephalopathy.</p><p id="par0100" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Alefacept</span> (Amevive<span class="elsevierStyleSup">®</span>). Is a LFA3-IgG fusion molecule that is used for the treatment of psoriasis. Alefacept interferes with T cell activation through preventing the binding between CD2 on TL, and LFA-3 (CD58), on APC, something that allows for the stability necessary for both cells to interact.</p><p id="par0105" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Natalizumab</span> (anti-α4-integrina, Tysabri<span class="elsevierStyleSup">®</span>). Inhibits the interaction between integrins and VCAM1 (<span class="elsevierStyleItalic">vascular cell adhesion molecule 1</span>). It has been approved for the treatment of MS and Crohn's disease, although some restrictions are in place due to its association with focal progressive leukoencephalopathy.</p><p id="par0110" class="elsevierStylePara elsevierViewall">The appearance of focal progressive leukoencephalopathy cases are not exclusive to this group but do appear relatively frequent in relation to it, elevating the suspicion that these drugs reduce immunologic surveillance of the JC virus and facilitate the expansion of a preexisting latent infection.</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">T Lymphocytes</span><p id="par0115" class="elsevierStylePara elsevierViewall">TL have a central role in the development of tolerance and autoimmunity. Diverse anomalies in intracellular signal transduction in T cells have been described in SLE, among them, a change in the complex formed by the TCR and its associated protein CD3 (<span class="elsevierStyleItalic">TCR complex</span>), which produces an increase in the initial events in signaling, leading to an exaggerated transduction and, in consequence an abnormal expression of cytokines. This justifies that the elevated capacity T cells have to stimulate BL to produce autoantibodies and explains the survival of autoreactive TL through a reduced rate of cell death, all of this resulting in the loss of tolerance that characterizes SLE.<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> This and other, several reasons have made TL an interesting target in autoimmune diseases.<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> However, we are faced with a difficult cell to approach, both for the subpopulations it has as for the interactions among them and other elements of the immune system. The diverse strategies used vs TL allow reaching a specific state of tolerance through depletion therapy, costimulatory molecule blocking, already commented upon, or acting over regulating TL.</p><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">T Cell Depletion</span><p id="par0120" class="elsevierStylePara elsevierViewall">Several biologic agents have been developed to obtain TL depletion, all of them studied in RA, where they did not achieve satisfactory results, but although hypothetically useful in SLE, have not been tested in this disease.</p><p id="par0125" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Anti-CD52</span> (CAMPATH-1, alentuzumab). CD52 is expressed on the surface of B, T CD4, T CD8 and NK cells, dendritic cells, thymocytes, monocytes-macrophages and eosinophils. The monoclonal anti-CD52 antibody is particularly employed in chronic lymphocytic leukemia but has shown some usefulness in autoimmune diseases such as MS. In spite of its abundant expression in a wide array of cells, alentuzumab leads to an especially prolonged and intense depletion of CD4<span class="elsevierStyleSup">+</span> TL, with severe adverse events and limiting its usefulness.</p><p id="par0130" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Anti-CD3</span>. CD3 is expressed in all TL and along with the TCR forms the TCR complex. The first biologic, approved 25<span class="elsevierStyleHsp" style=""></span>years ago for avoiding organ rejection, was OKT3 (muronomab), a mouse monoclonal antibody which saw limited use due to the frequent development of antimouse antibodies and because it stimulated TCR and activated T cells producing a massive liberation of cytokines. Visilizumab represents a new generation of anti-CD3, which on the one hand is a humanized antibody and on the other hand has suffered manipulation of its Fc to reduce the interaction with its receptor and, therefore, T cell activation and the massive production of cytokines. Its mechanism of action, apart from CD3 blockade, includes the induction of apoptosis in TL through a sustained stimulation of the TCR, while having no apparent effect of naïve T cells. Visilizumab has been tested in ulcerative colitis where it was not found effective and led to cardiovascular adverse events that have restricted the ulterior development of the drug, without any trials performed in SLE.</p><p id="par0135" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Other T cell depletion therapies</span>. Here we can include an anti-CD7, a mouse anti-CD5 (CD5 Plus) and also a mouse-derived anti-CD4 (cM-T<span class="elsevierStyleInf">412</span>) antibody, all of them T cell depleting, none tested in SLE.</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Regulating T Cells</span><p id="par0140" class="elsevierStylePara elsevierViewall">After antigenic stimulation, naïve T CD4 lymphocytes proliferate and differentiate, according to the local cytokine milieu, into different effector subtypes: Th1, Th2, Th17 or regulator T cells (Treg). Treg cells are characterized by the presence of CD4, CD25 and the FOXP3 transcription marker (T CD4<span class="elsevierStyleSup">+</span>CD25<span class="elsevierStyleSup">+</span>FOXP3<span class="elsevierStyleSup">+</span>). These cells, partly corresponding to what was known as suppressor T cells, contribute to immune homeostasis and maintenance of peripheral tolerance,<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a> making the search for an agonistic action over them a possible therapeutic objective. In spite of there being several subpopulations within Treg, with functions that are still not properly profiled, at least 3 strategies exist to influence them agonistically.</p><p id="par0145" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Varinostat and entinostat</span> (MS-275). Inhibitors of histone deacetylase, which induces the expression of FOXP3, a marker of Treg cells. It has been approved for use in skin lymphomas.</p><p id="par0150" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">BT-061</span> (tregalizumab). The binding of the humanized monoclonal antibody tregalizumab to a single epitope od CD4 induces a Treg signaling pathway that leads to its activation; this agonistic effect on Treg showed some benefit and good tolerance in phase IIa trials on RA and psoriasis. It has not been tested in SLE.</p><p id="par0155" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Rapamicina</span> (sirolimús, Rapamune<span class="elsevierStyleSup">®</span>). A natural antibiotic used as a cytostatic due to its inhibiting effect on mTOR (<span class="elsevierStyleItalic">mammalian target of rapamycin</span>), a fundamental regulator of cell growth and proliferation in many cell types. It has recently been observed that it up-regulates activation of CD4<span class="elsevierStyleSup">+</span>CD25<span class="elsevierStyleSup">+</span>FOXP3<span class="elsevierStyleSup">+</span> Tregs and, therefore, could represent a pathway to restore or increase suppressor T cell activity. In a small study carried out in 9 patients with SLE who had not responded to immunosuppressive treatment,<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a> rapamycin was administered and a reduction in disease activity (BILAG and SLEDAI) as in the use of steroids was seen. A wider prospective study is currently recruiting patients.</p><p id="par0160" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">IL-2</span> (aldesleukina, Proleukin<span class="elsevierStyleSup">®</span>). IL-2 is the main survival factor in Treg cells; however, another of its effects, such as stimulating the production of TNF-α, IFN-γ and IL-6, does not make it an attractive target in SLE.</p><p id="par0165" class="elsevierStylePara elsevierViewall">Another strategy using Treg has been the possibility of transfusions of previously extracted and expanded cells <span class="elsevierStyleItalic">in vitro</span>.</p></span></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Cytokines</span><p id="par0170" class="elsevierStylePara elsevierViewall">Multiple cytokines have been researched as therapeutic targets in SLE, with the aim of interrupting intercellular communication in different key steps of its pathophysiology.</p><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Tumor Necrosis Factor Alpha</span><p id="par0175" class="elsevierStylePara elsevierViewall">TNF-α has multiple proinflammatory effects that favor autoimmunity, but also has regulatory functions that may inhibit it. In fact, the fact that TNF can both enhance and weaken autoimmunity has been seen in different mouse models, so the use of TNF inhibitors in SLE may present with this same duality. In effect, in patient based studies, results are variable and seem to depend on time, with positive responses in the short but not in the medium-term. On the other hand, when TNF antagonists are used in RA, ANA becomes positive in up to half of cases, although drug induced lupus is present in less than 1%.<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">14</span></a> A small study in 6 patients with LN or refractory lupus arthritis used infliximab (IFX, Remicade<span class="elsevierStyleSup">®</span>) at 5<span class="elsevierStyleHsp" style=""></span>mg/kg in combination with azathioprine or methotrexate, leading to improvement of proteinuria and arthritis; although 4 patients showed an increase in anti-DNA and anticardiolipin antibodies, none presented worsening disease or thrombotic effects.<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">15</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Another study with IFX in renal lupus did not recruit the necessary number of patients and another, using etanercept (Enbrel<span class="elsevierStyleSup">®</span>) was interrupted before it ended. There is a current trial with etanercept for discoid lupus underway.</p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Interleukin 6</span><p id="par0185" class="elsevierStylePara elsevierViewall">IL-6 is a cytokine with multiple proinflammatory properties, of which stimulating plasma cells to produce antibodies is especially relevant for SLE, as it is promoting the differentiation of naïve T cells to Th17, which leads to the production of IL-17 and IL-10; another effect is the inhibition of naïve Treg cells by suppressing FOXP3, their characteristic marker. The inhibition of IL-6, as well as IL-17 and IL-10, in principle, should be a good therapeutic target in SLE.</p><p id="par0190" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Anti-IL-6r</span> (tocilizumab, RoActemra<span class="elsevierStyleSup">®</span>). A humanized monoclonal antibody against the soluble and membrane receptor of IL-6. It has been used in a small study with 16 patients in which it was effective but associated with a lot of infections<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">16</span></a>; although most of them were mild and some did not require antibiotic, controlled studies are needed to estimate the real risk of infection with TCZ. No current efforts are being made with this drug.</p><p id="par0195" class="elsevierStylePara elsevierViewall">A new generation of completely human monoclonal antibodies vs IL-6r (REGN88, SAR153191) is in its first stages of development.</p><p id="par0200" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Anti-IL-6</span> (ALD518). A humanized monoclonal antibody vs IL-6, in which a phase II trial involving 132 patients with RA, but not SLE,<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">17</span></a> has been carried out.</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Interleukin 17</span><p id="par0205" class="elsevierStylePara elsevierViewall">IL-17, which includes 6 members called IL-17A to IL-17F, is a proinflammatory cytokine with, among other functions, the participation in immune responses against extracellular bacteria and fungi, and activating the production of chemokines (CK) on the part of neighboring cells, which then recruit monocytes and neutrophils. IL-17 is abnormally elevated in SLE. Th17 cells are implicated in this hyperproduction, as in differentiation of T CD4<span class="elsevierStyleSup">+</span> cells in the presence of TGF-β (transforming growth factor β) and other cytokines, such as IL-6, IL-21 and IL-23. Other cell elements that contribute to a greater generation of Th17 are PDCs, through cytokines such as IL-6 and IL-23, and T cells, which infiltrate disease affected organs such as the skin or kidney.<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">18</span></a> Elevated IL-17, in addition to its proinflammatory effect has another effect in SK: stimulation of B cells, therefore increasing autoantibody titers+. This group of functions produces a vicious cycle in which high IL-17 activates innate immune system cells, such as PDC; the local action of IL-17 in the affected organs generates more autoantigens from damaged cells and this produces more immune complexes after the greater production of autoantibodies to which IL-17 has contributed.<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">19</span></a> Antibodies vs IL-17A and its receptor are being tested for RA and psoriasis.</p><p id="par0210" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Secukinumab</span> (AIN457). Human anti-IL17A tested in RA, psoriasis and uveítis,<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">20</span></a> but not in SLE. There is currently one trial evaluating efficacy and safety of secukinumab in RA patients who did not tolerate or had an inadequate response to anti-TNF.</p><p id="par0215" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">LY2439821</span>. Anti IL-17 humanized monoclonal antibody, used in RA.<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Interleukin 10</span><p id="par0220" class="elsevierStylePara elsevierViewall">IL-10 is a mainly anti-inflammatory cytokine with a potent suppressive effect on APC and TL, inhibiting the synthesis of inflammatory cytokines, secretion of CK and expression of costimulation molecules such as CD80 and CD86, all of which would lead to attenuation of autoimmunity. However, in certain circumstances, IL-10 might have proinflammatory effects, promoting proliferation, differentiation and production of antibodies on the part of BL. In fact, patients with SLE show abnormally high levels of IL-10 correlating with disease activity and, in mouse models, accelerating the development of nephritis, while anti-IL-10 treatment delays it. It has recently been proven that the presence of IC and IFN-α, both abundant in SLE, reduce the anti-inflammatory capacity of IL-10, explaining this cytokines paradoxical behavior in SLE.<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">22</span></a></p><p id="par0225" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Anti-IL-10</span> (B-N10). Attempting to answer this question, a small group of 6 patients with active SLE and dependent on steroids received a murine monoclonal anti-IL-10 (B-N10), showing a decrease in disease activity up to 6<span class="elsevierStyleHsp" style=""></span>months after a 21-day administration<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">23</span></a>; with all patients developing anti-B-N10 antibodies. Phase I trials with a human monoclonal anti-IL-10 antibody are in the works.</p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Interleukins 12 and 23</span><p id="par0230" class="elsevierStylePara elsevierViewall">IL-12 and IL-23 are secreted by macrophages and dendritic cells and intervene in the differentiation of R cells: IL-12 is composed by the p35 and p40 subunits, and induces Th1 lymphocytes, while IL-23 has the same p40 subunit and another subunit, p19, and contributes to Th17 differentiation.</p><p id="par0235" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Ustekinumab</span> (CNTO 1275, anti-p40). In mouse models it has been seen that animals lacking p40 are protected against arthritis, so a human antibody against this subunit has been developed, showing efficacy and safety in inflammatory intestinal disease,<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">24</span></a> psoriasis and psoriatic arthritis.</p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Interleukin 21</span><p id="par0240" class="elsevierStylePara elsevierViewall">IL-21 is a key molecule in differentiation of T lymphocytes toward an IL-17 inflammatory secretion pattern. In addition, IL-21 plasma levels in lupus patients are elevated compared to controls and in vitro studies show an increased proportion of IL-21 T cells<span class="elsevierStyleSup">+</span>, correlated with the proportion of IL17<span class="elsevierStyleSup">+</span><a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">25</span></a> T cells. In the BXSB-Yaa mouse model, the knockouts for the IL-21 receptor (IL-21R) developed an attenuated firm of lupus. In addition, IL-21 has a potent effect on B cell proliferation and differentiation to plasma cells. Along with these effects, which support an therapeutic agonist of IL-21, we know that this cytokine has a proapoptotic effect on naïve B cells, making it difficult to predict effect of a molecule regarding its net balance of inhibition in autoimmune diseases and which has not been tested in SLE yet.</p></span></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Chemokines</span><p id="par0245" class="elsevierStylePara elsevierViewall">Chemokines (CK) are cytokines characterized by having a chemotactic effect on different cell types, including recruitment and activation. This ability makes them necessary for antigen presentation where a great concentration of APC is needed. Hypothetically, inhibition of these molecules would lead to a deficient antigen presentation and might be useful to stop the perpetuation of autoimmunity. However, more than 40 CK have been identified and many bind to more than one receptor or, inversely, several CK receptors recognize multiple CK, making it difficult to selectively approach these molecules.</p><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">CXCR3</span><p id="par0250" class="elsevierStylePara elsevierViewall">It is the only receptor for 3 different CK from the CXC family (where X is an amino acid binding 2 cysteine residues [C] present in the N-terminal portion of the molecule), implicated in the maintenance and amplification of immune related processes.</p><p id="par0255" class="elsevierStylePara elsevierViewall">Skin and kidney biopsies of patients with SLE have shown the expression of CXCR3 in T cells; concretely, in the case of LN, there is a correlation between the number of CXCR3<span class="elsevierStyleSup">+</span> cells and the degree of renal disfunction.<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a> It has recently been found that the urine of patients with LN presents an increase of CD4 CXCR3<span class="elsevierStyleSup">+</span> lymphocytes, which may constitute a renal activity marker.<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">27</span></a> In a manipulation of the MRL/lpr model, lacking CXCR3 (MRL/lpr CXCR3<span class="elsevierStyleSup">−/−</span>), an improvement in nephritis was seen and, importantly, an attenuation of Th1 and Th17 responses, suggesting that CXCR3 blockade may act through 2 pathways in LN.<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">28</span></a> Therefore, CXCR3 receptor constitutes an attractive target against which several molecules have been designed. Although a phase II trial in patients with psoriasis had to be interrupted due to inefficiency, this result should not diminish the expectations that researchers have of CXCR3 as a target in SLE.</p></span></span><span id="sec0095" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Intracellular Signaling Pathways</span><p id="par0260" class="elsevierStylePara elsevierViewall">After a cell surface receptor binds with its ligand, a chain of successive biochemical phosphorylation and dephosphorylation events occur in the intracellular medium (cell signal transduction), ending in the nucleus where precise orders to synthesize a protein will be delivered (transcription). Protein kinases (PK) are involved in this chain of reactions, of which more than 500 have been identified, making possible interventions almost unlimited. Of these PK mediated transduction pathways <span class="elsevierStyleItalic">mitogen-activated protein kinases</span> (MAPK), <span class="elsevierStyleItalic">tyrosine kinases</span> (TK), <span class="elsevierStyleItalic">Janus kinases</span> (JAK) and <span class="elsevierStyleItalic">nuclear factor κB</span> (NFκB) are the most interesting as therapeutic targets. All have molecules used in RA, but none so far in SLE.</p><span id="sec0100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Mitogen-Activated Protein Kinases</span><p id="par0265" class="elsevierStylePara elsevierViewall">These mediate cell activities that include proliferation, survival/apoptosis and production of cytokines and metalloproteases. p38 is the best characterized and intervenes in the production of inflammatory cytokines, such as TNF-α, IL-1β and IL-6, as well as synthesize CK. Studies carried out with inhibitors of p38 (pamapimod, SCIO-460, VX-702) in RA have shown modest benefit and considerable toxicity.<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">29</span></a> These results seem to be poor because p38 looses its function downstream and the signaling pathway may be easily redirectioned to more proximal points through other kinases.</p></span><span id="sec0105" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Tyrosine Kinases</span><p id="par0270" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Spleen tyrosine kinase</span> (SyK) is an important mediator of signaling related to Fc receptor activation, making it a potential target in SLE because, at least in part, T cell autoreactivity in this disease is due to an anomalous stimulation of the TCR-CD3 complex and, on the other hand, a study on the efficacy in RA of fostamatinib, a SyK inhibitor, observed an early reduction in IL-6 levels.</p><p id="par0275" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Fostamatinib</span> (R788). A prodrug that, after oral administration, converts into R406, a potent SyK inhibitor. RA trials have contradictory results<a class="elsevierStyleCrossRefs" href="#bib0150"><span class="elsevierStyleSup">30,31</span></a> and additional studies are needed to establish their usefulness in SLE.</p><p id="par0280" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Imatinib</span> (Gleevec<span class="elsevierStyleSup">®</span>). BCR-ABL tyrosine kinase inhibitor, used in chronic myeloid leukemia, with positive effect in animal models of autoimmunity, such as diabetes in NOD (non obese diabetic) mice or collagen induced arthritis.<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">32</span></a> This has led to renewed interest in this molecule and it is currently being tested in type 1 diabetes, MS and RA.</p></span><span id="sec0110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Janus Kinases</span><p id="par0285" class="elsevierStylePara elsevierViewall">JAK1, JAK2, JAK3 and Tyk2, from the tyrosine kinase family of STAT (<span class="elsevierStyleItalic">signal transducer and activator of transcription</span>) transcription factors, integrate the JAK–STAT system that transduces signals from almost 40 cytokines and growth factors. JAK3 is critical for intracellular signal transduction from receptors for IL-2, IL-4, IL-7, IL-9, IL-15 and IL-21, ending in the activation of STAT proteins, which travel to the nucleus and mediate gene transcription. These cytokines intervene in lymphocyte activation and its suppression might lead to beneficial effects on autoimmune diseases.</p><p id="par0290" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Tofacitinib</span> (tasocitinib, CP-690<span class="elsevierStyleHsp" style=""></span>550). A JAK3 inhibitor that has demonstrated its clinical efficacy in a phase II trial of RA patients with good ACR responses.<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">33</span></a> Another phase II/III open label study showed a reduction in DAS28 as well as improvement in the ACR response. In both, infections due to neutropenia were the most frequent adverse event.</p></span><span id="sec0115" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Nuclear Factor κB</span><p id="par0295" class="elsevierStylePara elsevierViewall">A protein complex in charge of cell responses that controls DNA transcription, it is involved in reactions to stress, cytokines, free radicals and viral and bacterial antigens. No inhibitor molecules for these proteins have been tested in SLE.</p></span><span id="sec0120" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Other Intracellular Targets</span><p id="par0300" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Tacrolimús</span> (FK 506). Is a calcineurin inhibitor that leads to alterations in calcium flux. In animal models it reduces the incidence of skin lesions and has been proposed as an alternative for topical steroids in cutaneous lupus, but controlled studies are needed because the few available ones include few patients or lack a control group.<a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">34</span></a></p><p id="par0305" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Seliciclib</span> (CYC202). CDK (<span class="elsevierStyleItalic">cyclin-dependent kinases</span>) are a family of cell cycle-regulating protein kinases. Seliciclib stops the cell cycle by inhibiting these proteins and is being tested in patients with solid tumors and B cell lymphomas. In mouse SLE models it delays the appearance of proteinuria, reduces the production of anti-dsDNA antibodies and prolongs survival.<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">35</span></a> Inhibition of these proteins could represent an attractive route for the treatment of SLE.</p><p id="par0310" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Laquinimod</span>. An oral quinolone carboxamide, it has been effective in several models of autoimmune disease, including lupus. Its target is unknown, but it is considered an immune modulator with an action dependent of the Th1/Th2 balance, resulting in an inhibition of proinflammatory cytokines and an increase in anti-inflammatory ones.<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">36</span></a> Microarrays studies in patients with MS showed that laquinimod induces suppression of antigen presentation related genes; these effects were fundamentally found in the NFκB signaling pathway. Laquinimod has been used fundamentally for MS and is currently being tested in active LN.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">37</span></a></p></span></span><span id="sec0125" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Proteosome Inhibitors</span><p id="par0315" class="elsevierStylePara elsevierViewall">The proteasome is a complex structure in charge of proteolysis, the degradation of proteins which are damage or obsolescent. Ubiquitin is crucial in this process, marking proteins to be degraded so that they can be recognized by the proteasome. While most cells in the organism express a conventional proteosome (constitutive proteasome or subunit β5), cells of the immune system express a particular proteosome (subunit LMP7) called immunoproteosome. Inhibition of the proteasome leads to apoptosis due to the interruption of the degradation of key proteins in the cell cycle; additionally, antigens bound by APCs are peptides produced by degradation by proteasomes, therefore it collaborates indirectly with TL antigen-presenting. On the other hand, the immunoproteosome regulates the production of different proinflammatory cytokines, such as TNF, IL-6 and IL-23, and inhibition of the proteasome has an especially intense effect mainly on plasma cells, with its current clinical application centered on myeloma. However, advantages over the synthesis of autoantibodies in autoimmune inflammatory diseases could derive from these effects. There are currently 2 non-specific or dual (inhibiting both types) proteasome inhibitors (bortezomib and carfilzomib) and an immunoproteosome-specific inhibitor (ONX 0914).</p><p id="par0320" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Carfilzomib y bortezomib</span> (Velcade<span class="elsevierStyleSup">®</span>). Non-specific proteasome reversible inhibitors. They are used for treatment of myeloma, but their effect is limited because it produces peripheral neuropathy with a certain frequency. Both these and ONX 0914 have been tested in SLE mouse models, demonstrating a prevention in the development of disease and a reduction in the synthesis of antibodies by a double mechanism that includes the reduction of the number of plasma cells and the suppression in the production of IFN-α by PDC,<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">38</span></a> both effects that make proteasome inhibitors extraordinarily interesting molecules for the treatment of SLE.</p></span><span id="sec0130" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Ethical Responsibilities</span><span id="sec0135" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Protection of Human and Animal Subjects</span><p id="par0325" class="elsevierStylePara elsevierViewall">The authors declare that the procedures followed conformed to the ethical norms of the human experimentation committee and were in accordance with the World Medical Association and the Declaration of Helsinki.</p></span><span id="sec0140" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Confidentiality of Data</span><p id="par0330" class="elsevierStylePara elsevierViewall">The authors declare that no patient data appear in this article.</p></span><span id="sec0145" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Right to Privacy and Informed Consent</span><p id="par0335" class="elsevierStylePara elsevierViewall">The authors declare that no patient data appear in this article.</p></span></span><span id="sec0150" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Conflict of Interest</span><p id="par0340" class="elsevierStylePara elsevierViewall">Antonio C. Zea Mendoza is the PI of clinical trials for Abbott Lab, MSD, Astra-Zeneca and UCB Pharma.</p><p id="par0345" class="elsevierStylePara elsevierViewall">Alina L. Boteanu collaborates in a clinical trial with Astra-Zeneca.</p><p id="par0350" class="elsevierStylePara elsevierViewall">Walter A. Sifuentes Giraldo, María J. García Villanueva and Ana Lois Iglesias have no disclosures to make.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:15 [ 0 => array:2 [ "identificador" => "xres125935" "titulo" => "Abstract" ] 1 => array:2 [ "identificador" => "xpalclavsec113229" "titulo" => "Keywords" ] 2 => array:2 [ "identificador" => "xres125936" "titulo" => "Resumen" ] 3 => array:2 [ "identificador" => "xpalclavsec113228" "titulo" => "Palabras clave" ] 4 => array:2 [ "identificador" => "sec0005" "titulo" => "Inhibition Survival Factor B" ] 5 => array:3 [ "identificador" => "sec0010" "titulo" => "Inhibitors of T Cell Costimulation" "secciones" => array:3 [ 0 => array:2 [ "identificador" => "sec0015" "titulo" => "CD28-B7-1/B7-2 Blockage" ] 1 => array:2 [ "identificador" => "sec0020" "titulo" => "CD40/CD40L Blockage" ] 2 => array:2 [ "identificador" => "sec0025" "titulo" => "OX40/OX40L and ICOS/ICOS-L Blockage" ] ] ] 6 => array:2 [ "identificador" => "sec0030" "titulo" => "Adhesion Molecules" ] 7 => array:3 [ "identificador" => "sec0035" "titulo" => "T Lymphocytes" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0040" "titulo" => "T Cell Depletion" ] 1 => array:2 [ "identificador" => "sec0045" "titulo" => "Regulating T Cells" ] ] ] 8 => array:3 [ "identificador" => "sec0050" "titulo" => "Cytokines" "secciones" => array:6 [ 0 => array:2 [ "identificador" => "sec0055" "titulo" => "Tumor Necrosis Factor Alpha" ] 1 => array:2 [ "identificador" => "sec0060" "titulo" => "Interleukin 6" ] 2 => array:2 [ "identificador" => "sec0065" "titulo" => "Interleukin 17" ] 3 => array:2 [ "identificador" => "sec0070" "titulo" => "Interleukin 10" ] 4 => array:2 [ "identificador" => "sec0075" "titulo" => "Interleukins 12 and 23" ] 5 => array:2 [ "identificador" => "sec0080" "titulo" => "Interleukin 21" ] ] ] 9 => array:3 [ "identificador" => "sec0085" "titulo" => "Chemokines" "secciones" => array:1 [ 0 => array:2 [ "identificador" => "sec0090" "titulo" => "CXCR3" ] ] ] 10 => array:3 [ "identificador" => "sec0095" "titulo" => "Intracellular Signaling Pathways" "secciones" => array:5 [ 0 => array:2 [ "identificador" => "sec0100" "titulo" => "Mitogen-Activated Protein Kinases" ] 1 => array:2 [ "identificador" => "sec0105" "titulo" => "Tyrosine Kinases" ] 2 => array:2 [ "identificador" => "sec0110" "titulo" => "Janus Kinases" ] 3 => array:2 [ "identificador" => "sec0115" "titulo" => "Nuclear Factor κB" ] 4 => array:2 [ "identificador" => "sec0120" "titulo" => "Other Intracellular Targets" ] ] ] 11 => array:2 [ "identificador" => "sec0125" "titulo" => "Proteosome Inhibitors" ] 12 => array:3 [ "identificador" => "sec0130" "titulo" => "Ethical Responsibilities" "secciones" => array:3 [ 0 => array:2 [ "identificador" => "sec0135" "titulo" => "Protection of Human and Animal Subjects" ] 1 => array:2 [ "identificador" => "sec0140" "titulo" => "Confidentiality of Data" ] 2 => array:2 [ "identificador" => "sec0145" "titulo" => "Right to Privacy and Informed Consent" ] ] ] 13 => array:2 [ "identificador" => "sec0150" "titulo" => "Conflict of Interest" ] 14 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2011-12-26" "fechaAceptado" => "2012-01-04" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec113229" "palabras" => array:4 [ 0 => "Systemic lupus erythematosus" 1 => "Pathogenesis" 2 => "Treatment" 3 => "Biological therapies" ] ] ] "es" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palabras clave" "identificador" => "xpalclavsec113228" "palabras" => array:4 [ 0 => "Lupus eritematoso sistémico" 1 => "Patogenia" 2 => "Tratamiento" 3 => "Terapias biológicas" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:2 [ "titulo" => "Abstract" "resumen" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Glucocorticoids, aspirin, conventional antimalarials and immunosuppressants are the mainstay of treatment of Systemic Lupus Erythematosus (SLE). Until recently, the first three were the only agents approved for treatment. A better understanding of the pathophysiology of the immune system has identified new therapeutic targets. In fact, belimumab, a human monoclonal antibody to BLyS inhibitor has become, in recent months, the first drug approved for the treatment of SLE since 1957, underscoring difficulties of all kinds, including economic and organizational ones inherent to clinical trials on this disease. Many other molecules are in various stages of development and soon will have concrete results. In this review, we examined the mechanism of action and most relevant clinical data for these molecules.</p>" ] "es" => array:2 [ "titulo" => "Resumen" "resumen" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Glucocorticoides, aspirina, antipalúdicos e inmunosupresores convencionales constituyen la base del tratamiento del lupus eritematoso sistémico (LES). Hasta recientemente, los 3 primeros eran los únicos agentes aprobados para su tratamiento. El mejor conocimiento de la fisiopatología del sistema inmunitario ha permitido identificar nuevas dianas terapéuticas. De hecho, belimumab, un anticuerpo monoclonal humano inhibidor de BLyS, se ha convertido hace pocos meses en el primer fármaco aprobado para el tratamiento del LES desde 1957, lo que subraya las dificultades de todo tipo, incluyendo las económicas y organizativas, inherentes a los ensayos clínicos sobre esta enfermedad. Otras muchas moléculas se encuentran en distintas fases de desarrollo y en poco tiempo dispondremos de resultados concretos. En esta revisión repasamos el mecanismo de acción y los datos clínicos más relevantes de estas moléculas.</p>" ] ] "NotaPie" => array:1 [ 0 => array:2 [ "etiqueta" => "☆" "nota" => "<p class="elsevierStyleNotepara">Please cite this article as: Sifuentes Giraldo WA, et al. Nuevas dianas terapéuticas en el lupus sistémico (parte 2/2). Reumatol Clin. 2012;8(5):263–9.</p>" ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0005" "bibliografiaReferencia" => array:38 [ 0 => array:3 [ "identificador" => "bib0005" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Monoclonal antibodies for systemic lupus erythematosus" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "C. Ponticelli" 1 => "G. 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Year/Month | Html | Total | |
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2024 October | 18 | 9 | 27 |
2024 September | 74 | 21 | 95 |
2024 August | 90 | 46 | 136 |
2024 July | 89 | 43 | 132 |
2024 June | 91 | 39 | 130 |
2024 May | 99 | 51 | 150 |
2024 April | 96 | 41 | 137 |
2024 March | 84 | 51 | 135 |
2024 February | 54 | 43 | 97 |
2024 January | 62 | 29 | 91 |
2023 December | 69 | 27 | 96 |
2023 November | 61 | 46 | 107 |
2023 October | 68 | 37 | 105 |
2023 September | 165 | 39 | 204 |
2023 August | 83 | 23 | 106 |
2023 July | 89 | 32 | 121 |
2023 June | 59 | 27 | 86 |
2023 May | 64 | 25 | 89 |
2023 April | 100 | 28 | 128 |
2023 March | 112 | 51 | 163 |
2023 February | 99 | 38 | 137 |
2023 January | 74 | 30 | 104 |
2022 December | 138 | 50 | 188 |
2022 November | 86 | 42 | 128 |
2022 October | 139 | 50 | 189 |
2022 September | 115 | 49 | 164 |
2022 August | 90 | 50 | 140 |
2022 July | 90 | 66 | 156 |
2022 June | 112 | 52 | 164 |
2022 May | 109 | 44 | 153 |
2022 April | 113 | 66 | 179 |
2022 March | 93 | 65 | 158 |
2022 February | 77 | 56 | 133 |
2022 January | 73 | 47 | 120 |
2021 December | 52 | 46 | 98 |
2021 November | 59 | 51 | 110 |
2021 October | 65 | 57 | 122 |
2021 September | 52 | 41 | 93 |
2021 August | 30 | 39 | 69 |
2021 July | 44 | 31 | 75 |
2021 June | 32 | 40 | 72 |
2021 May | 50 | 52 | 102 |
2021 April | 118 | 83 | 201 |
2021 March | 70 | 48 | 118 |
2021 February | 42 | 22 | 64 |
2021 January | 48 | 18 | 66 |
2020 December | 48 | 27 | 75 |
2020 November | 28 | 22 | 50 |
2020 October | 30 | 27 | 57 |
2020 September | 35 | 33 | 68 |
2020 August | 26 | 20 | 46 |
2020 July | 31 | 17 | 48 |
2020 June | 47 | 31 | 78 |
2020 May | 170 | 18 | 188 |
2020 April | 33 | 16 | 49 |
2020 March | 21 | 11 | 32 |
2020 February | 2 | 0 | 2 |
2019 May | 1 | 0 | 1 |
2019 March | 1 | 0 | 1 |
2019 January | 1 | 0 | 1 |
2018 May | 5 | 1 | 6 |
2018 April | 67 | 13 | 80 |
2018 March | 54 | 21 | 75 |
2018 February | 51 | 4 | 55 |
2018 January | 47 | 7 | 54 |
2017 December | 51 | 5 | 56 |
2017 November | 61 | 10 | 71 |
2017 October | 50 | 5 | 55 |
2017 September | 51 | 7 | 58 |
2017 August | 67 | 7 | 74 |
2017 July | 71 | 8 | 79 |
2017 June | 102 | 22 | 124 |
2017 May | 114 | 12 | 126 |
2017 April | 85 | 7 | 92 |
2017 March | 72 | 7 | 79 |
2017 February | 50 | 5 | 55 |
2017 January | 56 | 8 | 64 |
2016 December | 93 | 21 | 114 |
2016 November | 78 | 9 | 87 |
2016 October | 107 | 16 | 123 |
2016 September | 95 | 13 | 108 |
2016 August | 90 | 7 | 97 |
2016 July | 55 | 4 | 59 |
2016 June | 0 | 12 | 12 |
2016 May | 1 | 14 | 15 |
2016 March | 1 | 0 | 1 |
2016 February | 1 | 0 | 1 |
2015 December | 3 | 0 | 3 |
2015 October | 1 | 0 | 1 |
2015 August | 4 | 0 | 4 |
2015 July | 42 | 5 | 47 |
2015 June | 55 | 8 | 63 |
2015 May | 86 | 15 | 101 |
2015 April | 62 | 18 | 80 |
2015 March | 58 | 6 | 64 |
2015 February | 48 | 6 | 54 |
2015 January | 51 | 8 | 59 |
2014 December | 47 | 18 | 65 |
2014 November | 33 | 17 | 50 |
2014 October | 40 | 12 | 52 |
2014 September | 38 | 15 | 53 |
2014 August | 37 | 15 | 52 |
2014 July | 41 | 13 | 54 |
2014 June | 68 | 11 | 79 |
2014 May | 40 | 10 | 50 |
2014 April | 53 | 9 | 62 |
2014 March | 45 | 17 | 62 |
2014 February | 48 | 15 | 63 |
2014 January | 36 | 11 | 47 |
2013 December | 26 | 10 | 36 |
2013 November | 34 | 9 | 43 |
2013 October | 49 | 17 | 66 |
2013 September | 38 | 13 | 51 |
2013 August | 72 | 21 | 93 |
2013 July | 38 | 10 | 48 |
2013 June | 44 | 10 | 54 |
2013 May | 33 | 17 | 50 |
2013 April | 69 | 25 | 94 |
2013 March | 46 | 30 | 76 |
2013 February | 23 | 15 | 38 |
2013 January | 21 | 19 | 40 |
2012 December | 31 | 20 | 51 |
2012 November | 42 | 39 | 81 |
2012 October | 21 | 22 | 43 |