Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disease in which persistent inflammation of synovial tissue results in a progressive functional decline of the joint and premature mortality. TNF inhibitors were the first biological disease-modifying antirheumatic drugs (DMARDs) used to treat RA. Since then, new biological drugs have emerged, such as inhibitors of IL-1, IL-6 and others, with different mechanisms of action that include the depletion of B cells and the inhibition of T-cell costimulation. Recently, RA treatments have incorporated the use of synthetic DMARDs. This review describes the molecular aspects of the mechanisms of action of biological and synthetic DMARDs, discusses the adverse effects and limitations of established therapies and analyses the alternative approaches to RA treatment.
Papers of special note have highlighted as: • of interest •• of considerable interest
References
- 1 Evidence for a cross-talk between human neutrophils and Th17 cells. Blood 115(2), 335–343Crossref, Medline, Google Scholar
- 2 . Angiogenesis as a therapeutic target in arthritis in 2011: learning the lessons of the colorectal cancer experience. Angiogenesis 14(3), 223–234 (2011).Crossref, Medline, CAS, Google Scholar
- 3 Synovial fibroblasts spread rheumatoid arthritis to unaffected joints. Nat. Med. 15(12), 1414–1420 (2009).• Describes how rheumatoid arthritis initiates with a few joints affected and subsequently a great majority of them are involved.Crossref, Medline, CAS, Google Scholar
- 4 Anti-TNF therapy in patients with rheumatoid arthritis decreases Th1 and Th17 cell populations and expands IFN-gamma-producing NK cell and regulatory T cell subsets. Immunobiology 216(12), 1256–1263 (2011).Crossref, Medline, CAS, Google Scholar
- 5 . Th17 cells are restrained by Treg cells via the inhibition of interleukin-6 in patients with rheumatoid arthritis responding to anti-tumor necrosis factor antibody therapy. Arthritis Rheum. 64(10), 3129–3138 (2012).Crossref, Medline, Google Scholar
- 6 The effects of adalimumab and methotrexate treatment on peripheral Th17 cells and IL-17/IL-6 secretion in rheumatoid arthritis patients. Rheumatol. Int. 30(12), 1553–1557 (2010).Crossref, Medline, CAS, Google Scholar
- 7 . Anti-TNF-αlpha therapy induces a distinct regulatory T cell population in patients with rheumatoid arthritis via TGF-beta. J. Exp. Med. 204(1), 33–39 (2007).Crossref, Medline, CAS, Google Scholar
- 8 Increased IL-17 production by peripheral T helper cells after tumour necrosis factor blockade in rheumatoid arthritis is accompanied by inhibition of migration-associated chemokine receptor expression. Rheumatology (Oxford) 49(12), 2264–2272 (2010).Crossref, Medline, Google Scholar
- 9 . Decrease of CD68 and MMP-3 expression in synovium by treatment of adalimumab for rheumatoid arthritis. Int. J. Rheum. Dis. 14(3), 261–266 (2011).Crossref, Medline, Google Scholar
- 10 . Tumour necrosis factor alpha blockade impairs dendritic cell survival and function in rheumatoid arthritis. Ann. Rheum. Dis. 69(6), 1200–1207 (2010).Crossref, Medline, CAS, Google Scholar
- 11 . Rheumatoid arthritis: anti-TNF therapy for RA hinders function and survival of dendritic cells. Nat. Rev. Rheumatol. 6(7), 383 (2010).Crossref, Google Scholar
- 12 Early and late effect of infliximab on circulating dendritic cells phenotype in rheumatoid arthritis patients. Int. J. Clin. Pharmacol. Res. 25(1), 9–18 (2005).Medline, CAS, Google Scholar
- 13 . Anti-TNF alpha therapy in rheumatoid arthritis--current and future directions. Curr. Dir. Autoimmun. 2, 83–102 (2000).Crossref, Medline, CAS, Google Scholar
- 14 Serum levels of lipoprotein(a) and E-selectin are reduced in rheumatoid arthritis patients treated with methotrexate or methotrexate in combination with TNF-αlpha-inhibitor. Clin. Exp. Rheumatol. 31(3), 415–421 (2013).Medline, Google Scholar
- 15 Monocyte migration to the synovium in rheumatoid arthritis patients treated with adalimumab. Ann. Rheum. Dis. 70(6), 1160–1162 (2011).Crossref, Medline, CAS, Google Scholar
- 16 Increased IL-17 production by peripheral T helper cells after tumour necrosis factor blockade in rheumatoid arthritis is accompanied by inhibition of migration-associated chemokine receptor expression. Rheumatology (Oxford) 49(12), 2264–2272Crossref, Medline, Google Scholar
- 17 . Infliximab reduces the frequency of interleukin 17-producing cells and the amounts of interleukin 17 in patients with rheumatoid arthritis. J. Investig. Med. 58(7), 905–908 (2010).Crossref, Medline, CAS, Google Scholar
- 18 Infliximab reduces CD147, MMP-3, and MMP-9 expression in peripheral blood monocytes in patients with active rheumatoid arthritis. Eur. J. Pharmacol. 698(1–3), 429–434 (2013).Crossref, Medline, CAS, Google Scholar
- 19 CD147 overexpression on synoviocytes in rheumatoid arthritis enhances matrix metalloproteinase production and invasiveness of synoviocytes. Arthritis Res. Ther. 8(2), R44 (2006).Crossref, Medline, Google Scholar
- 20 Monocyte populations as markers of response to adalimumab plus MTX in rheumatoid arthritis. Arthritis Res. Ther. 14(4), R175 (2012).Crossref, Medline, CAS, Google Scholar
- 21 Anti-TNF treatment blocks the induction of T cell-dependent humoral responses. Ann. Rheum. Dis. 72(6), 1037–1043 (2013).Crossref, Medline, Google Scholar
- 22 Decreased influenza-specific B cell responses in rheumatoid arthritis patients treated with anti-tumor necrosis factor. Arthritis Res. Ther. 13(6), R209 (2011).Crossref, Medline, CAS, Google Scholar
- 23 Influenza vaccine administration in rheumatoid arthritis patients under treatment with TNFalpha blockers: safety and immunogenicity. Clin. Immunol. 134(2), 113–120 (2010).Crossref, Medline, CAS, Google Scholar
- 24 . Anti-TNF therapy reduces serum levels of chemerin in rheumatoid arthritis: a new mechanism by which anti-TNF might reduce inflammation. PLoS ONE 8(2), e57802 (2013).Crossref, Medline, CAS, Google Scholar
- 25 Normalization of A2A and A3 adenosine receptor up-regulation in rheumatoid arthritis patients by treatment with anti-tumor necrosis factor alpha but not methotrexate. Arthritis Rheum. 60(10), 2880–2891 (2009).Crossref, Medline, CAS, Google Scholar
- 26 . Drug levels, anti-drug antibodies, and clinical efficacy of the anti-TNFalpha biologics in rheumatic diseases. Clin. Rheumatol. 32(10), 1429–1435 (2013).Crossref, Medline, CAS, Google Scholar
- 27 . Targeting protein-protein interactions with small molecules: challenges and perspectives for computational binding epitope detection and ligand finding. Curr. Med. Chem. 13(22), 2607–2625 (2006).•• Describes new developments to dissolve electrostatic interactions between interfaces of proteins to disrupt its active form.Crossref, Medline, CAS, Google Scholar
- 28 The new IL-1 family member IL-1F8 stimulates production of inflammatory mediators by synovial fibroblasts and articular chondrocytes. Arthritis Res. Ther. 8(3), R80 (2006).Crossref, Medline, Google Scholar
- 29 . Divergent effects of infliximab and anakinra therapies on macrophage phenotype from patients with refractory rheumatoid arthritis. Int. J. Immunopathol. Pharmacol. 23(2), 491–501 (2010).Crossref, Medline, CAS, Google Scholar
- 30 Inhibition of interleukin-1 by anakinra improves vascular and left ventricular function in patients with rheumatoid arthritis. Circulation 117(20), 2662–2669 (2008).Crossref, Medline, CAS, Google Scholar
- 31 . Blocking the effects of IL-1 in rheumatoid arthritis protects bone and cartilage. Rheumatology (Oxford) 41(9), 972–980 (2002).Crossref, Medline, CAS, Google Scholar
- 32 Human beta-defensin 3 mediates tissue remodeling processes in articular cartilage by increasing levels of metalloproteinases and reducing levels of their endogenous inhibitors. Arthritis Rheum. 52(6), 1736–1745 (2005).Crossref, Medline, CAS, Google Scholar
- 33 Investigation on PEGylation strategy of recombinant human interleukin-1 receptor antagonist. Bioorg. Med. Chem. 15(16), 5396–5405 (2007).Crossref, Medline, CAS, Google Scholar
- 34 Anti-serum albumin domain antibodies for extending the half-lives of short lived drugs. Protein Eng. Des. Sel. 21(5), 283–288 (2008).Crossref, Medline, CAS, Google Scholar
- 35 . Insertion of multiple alpha-amino gamma-lactam (Agl) residues into a peptide sequence by solid-phase synthesis on synphase lanterns. Biopolymers 94(2), 183–191 (2010).Crossref, Medline, CAS, Google Scholar
- 36 Development of a novel noncompetitive antagonist of IL-1 receptor. J. Immunol. 180(10), 6977–6987 (2008).Crossref, Medline, CAS, Google Scholar
- 37 Characterization of 99mTc-labeled cytokine ligands for inflammation imaging via TNF and IL-1 pathways. Nucl. Med. Biol. 39(7), 905–915 (2012).•• Describes one strategy to target two proinflammatory pathways simultaneously, which could be more effective than targeting a single pathway. Crossref, Medline, CAS, Google Scholar
- 38 Molecular construction and optimization of anti-human IL-1alpha/beta dual variable domain immunoglobulin (DVD-Ig) molecules. MAbs 1(4), 339–347 (2009).Crossref, Medline, Google Scholar
- 39 Abnormal B-cell cytokine responses a trigger of T-cell-mediated disease in MS? Ann. Neurol. 67(4), 452–461 (2010).Crossref, Medline, CAS, Google Scholar
- 40 The anti-CD20 antibody rituximab reduces the T helper 17 response. Arthritis Rheum. 63(6), 1507–1516 (2011).Crossref, Medline, Google Scholar
- 41 Clinical and immunological effects of rituximab in patients with lupus nephritis refractory to conventional therapy: a pilot study. Arthritis Res. Ther. 8(3), R83 (2006).Crossref, Medline, Google Scholar
- 42 . Rituximab-induced T-cell depletion in patients with rheumatoid arthritis: Association with clinical response. Arthritis Rheum. 65(11), 2783–2790 (2013).Crossref, Medline, CAS, Google Scholar
- 43 Depletion of B lymphocytes in rheumatoid arthritis patients modifies IL-8-anti-IL-8 autoantibody network. Clin. Immunol. 133(1), 108–116 (2009).Crossref, Medline, CAS, Google Scholar
- 44 B-cell depletion inhibits arthritis in a collagen-induced arthritis (CIA) model, but does not adversely affect humoral responses in a respiratory syncytial virus (RSV) vaccination model. Blood 106(7), 2235–2243 (2005).Crossref, Medline, CAS, Google Scholar
- 45 Epratuzumab, a humanized monoclonal antibody targeting CD22: characterization of in vitro properties. Clin. Cancer Res. 9(10 Pt 2), 3982S–3990S (2003).Medline, CAS, Google Scholar
- 46 Efficacy and safety of belimumab in patients with rheumatoid arthritis: a Phase II, randomized, double-blind, placebo-controlled, dose-ranging study. J. Rheumatol. 40(5), 579–589 (2013).Crossref, Medline, CAS, Google Scholar
- 47 . Abatacept binds to the Fc receptor CD64 but does not mediate complement-dependent cytotoxicity or antibody-dependent cellular cytotoxicity. J. Rheumatol. 34(11), 2204–2210 (2007).•• The modifications in Fc portions of immunoglobulins make it possible to avoid ADCC and complement activations as an undesired mechanism.Medline, CAS, Google Scholar
- 48 CTLA-4-Ig regulates tryptophan catabolism in vivo. Nat. Immunol. 3(11), 1097–1101 (2002).Crossref, Medline, CAS, Google Scholar
- 49 Modulation of tryptophan catabolism by regulatory T cells. Nat. Immunol. 4(12), 1206–1212 (2003).Crossref, Medline, CAS, Google Scholar
- 50 T cell apoptosis by tryptophan catabolism. Cell Death Differ. 9(10), 1069–1077 (2002).Crossref, Medline, CAS, Google Scholar
- 51 . CTLA4-Ig (abatacept) therapy modulates T cell effector functions in autoantibody-positive rheumatoid arthritis patients. BMC Immunol. 14, 34 (2013).Crossref, Medline, Google Scholar
- 52 CTLA-4-Ig therapy diminishes the frequency but enhances the function of Treg cells in patients with rheumatoid arthritis. J. Clin. Immunol. 31(4), 588–595 (2011).Crossref, Medline, CAS, Google Scholar
- 53 CTLA4-Ig interacts with cultured synovial macrophages from rheumatoid arthritis patients and downregulates cytokine production. Arthritis Res. Ther. 11(6), R176 (2009).Crossref, Medline, Google Scholar
- 54 Alterations in cytokine profile and dendritic cells subsets in peripheral blood of rheumatoid arthritis patients before and after biologic therapy. Ann. NY Acad. Sci. 1173, 334–342 (2009).Crossref, Medline, CAS, Google Scholar
- 55 Abatacept (CTLA-4IG) treatment reduces the migratory capacity of monocytes in patients with rheumatoid arthritis. Arthritis Rheum. 65(3), 599–607 (2013).Crossref, Medline, CAS, Google Scholar
- 56 CTLA-4IG suppresses reactive oxygen species by preventing synovial adherent cell-induced inactivation of Rap1, a Ras family GTPASE mediator of oxidative stress in rheumatoid arthritis T cells. Arthritis Rheum. 54(10), 3135–3143 (2006).Crossref, Medline, CAS, Google Scholar
- 57 . Antibody-mediated stripping of CD4 from lymphocyte cell surface in patients with rheumatoid arthritis. Rheumatology (Oxford) 42(1), 54–61 (2003).Crossref, Medline, CAS, Google Scholar
- 58 High-affinity small molecule inhibitors of T cell costimulation: compounds for immunotherapy. Chem. Biol. 11(12), 1651–1658 (2004).Crossref, Medline, CAS, Google Scholar
- 59 cell co-stimulation using a CD80 blocking small molecule reduces delayed type hypersensitivity responses in rhesus monkeys. Clin. Exp. Immunol. 158(1), 91–98 (2009).Crossref, Medline, CAS, Google Scholar
- 60 . IL-6 increases B-cell IgG production in a feed-forward proinflammatory mechanism to skew hematopoiesis and elevate myeloid production. Blood 115(23), 4699–4706 (2010).Crossref, Medline, CAS, Google Scholar
- 61 Treatment of rheumatoid arthritis with humanized anti-interleukin-6 receptor antibody: a multicenter, double-blind, placebo-controlled trial. Arthritis Rheum. 50(6), 1761–1769 (2004).Crossref, Medline, CAS, Google Scholar
- 62 . Interleukin-6 receptor blockade selectively reduces IL-21 production by CD4 T cells and IgG4 autoantibodies in rheumatoid arthritis. Int. J. Biol. Sci. 9(3), 279–288 (2013).Crossref, Medline, Google Scholar
- 63 . Evidence for the role of Th17 cell inhibition in the prevention of autoimmune diseases by anti-interluekin-6 receptor antibody. Biofactors 35(1), 47–51 (2009).Crossref, Medline, CAS, Google Scholar
- 64 Brief report: inhibition of interleukin-6 function corrects Th17/Treg cell imbalance in patients with rheumatoid arthritis. Arthritis Rheum. 64(8), 2499–2503 (2012).Crossref, Medline, CAS, Google Scholar
- 65 The influence of excessive IL-6 production in vivo on the development and function of Foxp3+ regulatory T cells. J. Immunol. 186(1), 32–40Crossref, Medline, Google Scholar
- 66 Distinct inflammatory signals have physiologically divergent effects on epigenetic regulation of foxp3 expression and treg function. Am. J. Transplant. 11(2), 203–214 (2011).Crossref, Medline, CAS, Google Scholar
- 67 Effect of interleukin-6 receptor blockade on the balance between regulatory T cells and T helper type 17 cells in rheumatoid arthritis patients. Clin. Exp. Immunol. 171(3), 237–242 (2013).Crossref, Medline, CAS, Google Scholar
- 68 Effects of inhibition of interleukin-6 signalling on insulin sensitivity and lipoprotein (a) levels in human subjects with rheumatoid diseases. PLoS ONE 5(12), e14328 (2010).Crossref, Medline, CAS, Google Scholar
- 69 . Cardiovascular death in rheumatoid arthritis: a population-based study. Arthritis Rheum. 52(3), 722–732 (2005).Crossref, Medline, Google Scholar
- 70 . Anti-IL-6 receptor antibody (tocilizumab): a B cell targeting therapy. Clin. Exp. Rheumatol. 29(4), 697–700 (2011).•• Demonstrates the participation of B regulatory cells in the improvement of rheumatoid arthritis.Medline, CAS, Google Scholar
- 71 . [Relationship of the clinical efficiency of tocilizumab therapy to the serum level of matrix metalloproteinase-3 in patients with rheumatoid arthritis]. Ter. Arkh. 85(5), 24–29 (2013).Medline, CAS, Google Scholar
- 72 . Targeting the glycoprotein 130 receptor subunit to control pain and inflammation. J. Interferon Cytokine Res. 30(12), 865–873 (2010).Crossref, Medline, CAS, Google Scholar
- 73 Modulation of innate and adaptive immune responses by tofacitinib (CP-690,550). J. Immunol. 186(7), 4234–4243 (2011).Crossref, Medline, CAS, Google Scholar
- 74 The JAK inhibitor, tofacitinib, reduces the T cell stimulatory capacity of human monocyte-derived dendritic cells. Ann. Rheum. Dis. doi: 10.1136/annrheumdis-2013-203756 (2013) (Epub ahead of print).Crossref, Google Scholar
- 75 Dissecting specificity in the Janus kinases: the structures of JAK-specific inhibitors complexed to the JAK1 and JAK2 protein tyrosine kinase domains. J. Mol. Biol. 387(1), 219–232 (2009).Crossref, Medline, CAS, Google Scholar
- 76 Examining the chirality, conformation and selective kinase inhibition of 3-((3R,4R)-4-methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidin-1-y l)-3-oxopropanenitrile (CP-690,550). J. Med. Chem. 51(24), 8012–8018 (2008).Crossref, Medline, CAS, Google Scholar
- 77 . Inhibition of JAKs in macrophages increases lipopolysaccharide-induced cytokine production by blocking IL-10-mediated feedback. J. Immunol. 189(6), 2784–2792 (2012).• The failure in the specificity of JAK inhibitor could increase proinflammatory cytokine release due to the inhibition of IL-10 negative feedback control of cytokine production.Crossref, Medline, CAS, Google Scholar
- 78 . Efficacy, pharmacodynamics, and safety of VX-702, a novel p38 MAPK inhibitor, in rheumatoid arthritis: results of two randomized, double-blind, placebo-controlled clinical studies. Arthritis Rheum. 60(5), 1232–1241 (2009).Crossref, Medline, Google Scholar
- 79 Antiinflammatory functions of p38 in mouse models of rheumatoid arthritis: advantages of targeting upstream kinases MKK-3 or MKK-6. Arthritis Rheum. 64(9), 2887–2895 (2012).Crossref, Medline, CAS, Google Scholar
- 80 . MEK inhibitors: apatent review 2008–2010. Expert Opin. Ther. Pat. 21(7), 1045–1069 (2011).Crossref, Medline, CAS, Google Scholar

