Cập nhật điều trị bệnh nhược cơ

Current Treatment Options in Neurology - Tập 22 - Trang 1-14 - 2020
Elena Cortés-Vicente1,2,3,4, Eduard Gallardo1,2,3,4, Rodrigo Álvarez-Velasco1,2,3,4, Isabel Illa1,2,3,4
1Neuromuscular Diseases Unit, Department of Neurology, Hospital de La Santa Creu I Sant Pau, Barcelona, Spain
2Department of Medicine, Universitat Autònoma de Barcelona, Bellaterra, Spain
3Neuromuscular Diseases Laboratory - Biomedical Research Institute Sant Pau, Universitat Autónoma de Barcelona, Barcelona, Spain
4Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain

Tóm tắt

Bài tổng quan này trình bày cập nhật về các chiến lược điều trị hiện tại cho bệnh nhân mắc bệnh nhược cơ (MG) tùy thuộc vào đặc điểm lâm sàng và miễn dịch của họ. Hiện nay, các lựa chọn điều trị có sẵn cho MG bao gồm: (1) ức chế acetylcholinesterase, hữu ích như một phương pháp điều trị triệu chứng; (2) thuốc ức chế miễn dịch, là điều trị chính, được bắt đầu và tăng cường theo các hướng dẫn quốc tế; (3) thuốc điều biến miễn dịch (immunoglobulin tiêm tĩnh mạch và thay huyết tương), chủ yếu được sử dụng trong tình trạng cấp cứu hoặc khủng hoảng MG; và (4) cắt tuyến ức, được thực hiện trên các bệnh nhân có u tuyến ức, cũng như trên các bệnh nhân dưới 65 tuổi có kháng thể chống thụ thể acetylcholine và không có u tuyến ức, theo các khuyến nghị của một thử nghiệm lâm sàng quốc tế gần đây. MG là một bệnh đa dạng, do đó, việc lựa chọn phương pháp điều trị phụ thuộc vào đặc điểm của bệnh nhân, đặc biệt quan trọng là hồ sơ miễn dịch của họ. Ví dụ, những bệnh nhân dương tính với anti-MuSK phản ứng rất tốt với rituximab. Các loại thuốc mới được phê duyệt, như eculizumab và immunoglobulin dưới da, cũng như các thử nghiệm lâm sàng đang diễn ra, được thảo luận. Tiên lượng cho các bệnh nhân MG đã cải thiện đáng kể nhờ vào việc hiểu rõ hơn về sự đa dạng của bệnh và sự xuất hiện của các lựa chọn và cách tiếp cận điều trị mới. Tuy nhiên, tác dụng phụ không phải là hiếm gặp và khoảng 10% bệnh nhân kháng với các phương pháp điều trị thông thường, cho thấy cần phát triển các loại thuốc mới và cụ thể hơn.

Từ khóa

#nhược cơ #điều trị #thuốc ức chế miễn dịch #thuốc điều biến miễn dịch #cắt tuyến ước #kháng thể chống thụ thể acetylcholine

Tài liệu tham khảo

Gilhus NE. Myasthenia gravis. N Engl J Med. 2016;375:2570–81. Querol L, Illa I. Myasthenia gravis and the neuromuscular junction. Curr Opin Neurol. 2013;26:459–65. Meriggioli MN, Sanders DB. Autoimmune myasthenia gravis: emerging clinical and biological heterogeneity. Lancet Neurol. 2009;8:475–90. Gilhus NE, Verschuuren JJ. Myasthenia gravis: subgroup classification and therapeutic strategies. Lancet Neurol. 2015;14:1023–36. Patrick J, Lindstrom J. Autoimmune response to acetylcholine receptor. Science. 1973;6:871–2. Lindstrom JM, Seybold ME, Lennon VA, Whittingham S, Duane DD. Antibody to acetylcholine receptor in myasthenia gravis: prevalence, clinical correlates, and diagnostic value. Neurology. 1998;51:933. Hoch W, McConville J, Helms S, Newsom-Davis J, Melms A, Vincent A. Autoantibodies to the receptor tyrosine kinase MuSK in patients with myasthenia gravis without acetylcholine receptor antibodies. Nat Med. 2001;7:365–8. Evoli A, Tonali PA, Padua L, et al. Clinical correlates with anti-MuSK antibodies in generalized seronegative myasthenia gravis. Brain. 2003;126:2304–11. Mossman S, Vincent A, Newsom-Davis J. Myasthenia gravis without acetylcholinereceptor antibody: a distinct disease entity. Lancet. 1986;1:116–9. Romi F, Aarli JA, Gilhus NE. Seronegative myasthenia gravis: disease severity and prognosis. Eur J Neurol. 2005;12:413–8. Higuchi O, Hamuro J, Motomura M, Yamanashi Y. Autoantibodies to low-density lipoprotein receptor-related protein 4 in myasthenia gravis. Ann Neurol. 2011;69:418–22. Cortés-Vicente E, Gallardo E, Martínez MA, Díaz-Manera J, Querol L, Rojas-García R, et al. Clinical characteristics of patients with double-seronegative myasthenia gravis and antibodies to cortactin. JAMA Neurol. 2016;73:1099–104. Illa I, Cortés-Vicente E, Martínez MA, Gallardo E. Diagnostic utility of cortactin antibodies in myasthenia gravis. Ann N Y Acad Sci. 2018;1412:90–4. Conti-Fine BM, Milani M, Kaminski HJ. Myasthenia gravis: past, present, and future. J Clin Invest. 2006;116(11):2843–54. Phillips WD, Vincent A. Pathogenesis of myasthenia gravis: update on disease types, models, and mechanisms. F1000Res. 2016;5. Berrih-Aknin S, Frenkian-Cuvelier M, Eymard B. Diagnostic and clinical classification of autoimmune myasthenia gravis. J Autoimmun. 2014;48–49:143–8. Ramos-Fransi A, Rojas-García R, Segovia S, Márquez-Infante C, Pardo J, Coll-Cantí J, et al. Myasthenia gravis: descriptive analysis of life-threatening events in a recent nationwide registry. Eur J Neurol. 2015;22:1056–61. Marx A, Pfister F, Schalke B, Saruhan-Direskeneli G, Melms A, Strobel P. The different roles of the thymus in the pathogenesis of the various myasthenia gravis subtypes. Autoimmun Rev. 2013;12:875–84. Cortés-Vicente E, Álvarez-Velasco R, Segovia S, Paradas C, Casasnovas C, Guerrero-Sola A, et al. Clinical and therapeutic features of myasthenia gravis in adults based on age at onset. Neurology. 2020;94(11):e1171–80. Suh J, Goldstein JM and Nowak RJ. Clinical characteristics of refractory myasthenia gravis patients. Yale J Biol Med 2013;86:255–226. • Sanders DB, Wolfe GI, Benatar M, et al. International consensus guidance for management of myasthenia gravis executive summary. Neurology. 2016;87:419–25 This study provides a treatment consensus of international experts on MG. Díaz-Manera J, Rojas-Garcia R, Illa I. Treatment strategies for myasthenia gravis: an update. Expert Opin Pharmacother. 2012;13:1873–83. Barnett C, Tabasinejad R, Bril V. Current pharmacotherapeutic options for myasthenia gravis. Expert Opin Pharmacother. 2019;20(18):2295–303. Benatar M, Mcdermott MP, Sanders DB, Wolfe GI, Barohn RJ, Nowak RJ, et al. Efficacy of prednisone for the treatment of ocular myasthenia (epitome): a randomized controlled trial. Muscle Nerve. 2016;53:363–9. Palace J, Newsom-Davis J, Lecky B. A randomized double-blind trial of prednisolone alone or with azathioprine in myasthenia gravis. Neurology. 1998;50:1778–83. Meriggioli MN, Rowin J, Richman JG, Leurgans S. Mycophenolate mofetil for myasthenia gravis: a double-blind, placebo-controlled pilot study. Ann N Y Acad Sci. 2003;998:494–9. Muscle Study Group. A trial of mycophenolate mofetil with prednisone as initial immunotherapy in myasthenia gravis. Neurology. 2008;71:394–9. Burns TM, Sanders DB, Kaminski HJ, Wolfe GI, Narayanaswami P, Venitz J. Two steps forward, one step back: mycophenolate mofetil treatment for myasthenia gravis in the United States. Muscle Nerve. 2015;51:635–7. Oskarsson B, Rocke DM, Dengel K, Richman DP. Myasthenia gravis exacerbation after discontinuing mycophenolate: a single- center cohort study. Neurology. 2016;86:1159–63. Hobson-Webb LD, et al. Can Mycophenolate mofetil be tapered safely in myasthenia gravis? A retrospective multicenter analysis. Muscle Nerve. 2015;52:211–5. Tindall RS, Phillips JT, Rollins JA, Wells L, Hall K. A clinical therapeutic trial of cyclosporine in myasthenia gravis. Ann N Y Acad Sci. 1993;681:539–51. Tindall RS, et al. Preliminary results of a double-blind, randomized, placebo-controlled trial of cyclosporine in myasthenia gravis. N Engl J Med. 1987;316:719–24. Cruz JL, Wolff ML, Vanderman AJ, Brown JN. The emerging role of Tacrolimus in myasthenia gravis. Ther Adv Neurol Disord. 2015;8:92–103. Yoshikawa H, Kiuchi T, Saida T, Takamori M. Randomised, double-blind, placebo-controlled study of tacrolimus in myasthenia gravis. J Neurol Neurosurg Psychiatry. 2011;82:970–7. Zhou L, Liu W, Li W, Li H, Zhang X, Shang H, et al. Tacrolimus in the treatment of myasthenia gravis in patients with an inadequate response to glucocorticoid therapy: randomized, double-blind, placebo-controlled study conducted in China. Ther Adv Neurol Disord. 2017;10:315–25. • Díaz-Manera J, Martínez-Hernández E, Querol L, et al. Long-lasting treatment effect of rituximab in MuSK myasthenia. Neurology. 2012;78:189–93 This study provides evidence of excellent response to rituximab of MG patients with antibodies to MuSK. Illa I, et al. Sustained response to rituximab in anti- AChR and anti- MuSK positive myasthenia gravis patients. J Neuroimmunol. 2008;201–202:90–4. Nowak RJ, Dicapua DB, Zebardast N, Goldstein JM. Response of patients with refractory myasthenia gravis to rituximab: a retrospective study. Ther Adv Neurol Disord. 2011;4:259–66. Iorio R, Damato V, Alboini PE, Evoli A. Efficacy and safety of rituximab for myasthenia gravis: a systematic review and meta-analysis. J Neurol. 2015;262:1115–9. Tandan R, Hehir MK, Waheed W, Howard DB. Rituximab treatment of myasthenia gravis: a systematic review. Muscle Nerve. 2017;56:185–96. Hehir MK, et al. Rituximab as treatment for anti-MuSK myasthenia gravis: multicenter blinded prospective review. Neurology. 2017;9:1069–77. Nowak RJ, et al. B cell targeted treatment in myasthenia gravis (BeatMG): a phase 2 trial of rituximab in myasthenia gravis. Neurology. 2018;90:e2182–94 (abstract). Lebrun C, Bourg V, Bresch S, Cohen M, Rosenthal-Allieri MA, Desnuelle C, et al. Therapeutic target of memory B cells depletion helps to tailor administration frequency of rituximab in myasthenia gravis. J Neuroimmunol. 2016;298:79–81. Cortés-Vicente E, Rojas-garcia R, Díaz-Manera J, et al. The impact of rituximab infusion protocol on the long-term outcome in anti-MuSK myasthenia gravis. Ann Clin Transl Neurol. 2018;5:710–6. Pasnoor M, He J, Herbelin L, Burns TM, Nations S, Bril V, et al. A randomized controlled trial of methotrexate for patients with generalized myasthenia gravis. Neurology. 2016;87(1):57–64. Gomez-Figueroa E, Garcia-Trejo S, Bazan-Rodriguez L, Cervantes-Uribe R, Chac-Lezama G, López-Hernández JC, et al. Intravenous cyclophosphamide monthly pulses in refractory myasthenia gravis. J Neurol. 2020;267(3):674–8. Buzzard KA, Meyer NJ, Hardy TA, Riminton DS, Reddel SW. Induction intravenous cyclophosphamide followed by maintenance oral immunosuppression in refractory myasthenia gravis. Muscle Nerve. 2015;52(2):204–10. Drachman DB, Jones RJ, Brodsky RA. Treatment of refractory myasthenia: “rebooting” with high-dose cyclophosphamide. Ann Neurol. 2003;53:29–34. Gajdos P, Chevret S, Clair B, Tranchant C, Chastang C. Clinical trial of plasma exchange and high dose immunoglobulin in myasthenia gravis. Ann Neurol. 1997;41:789–96. Gajdos P, Tranchant C, Clair B, Bolgert F, Eymard B, Stojkovic T, et al. Treatment of myasthenia gravis exacerbation with intravenous immunoglobulin: a randomized double-blind clinical trial. Arch Neurol. 2005;62:1689–93. Kaminski HJ, Cutter G, Ruff R. Practice parameters and focusing research: plasma exchange for myasthenia gravis. Muscle Nerve. 2011;43:625–6. Gronseth GS, Barohn RJ. Practice parameter: thymectomy for autoimmune myasthenia gravis (an evidence-based review): report of the Quality Standards Subcommittee of the American Academy of Neurology. Neurology. 2000;55:7–15. Ropper AH. RetroSternal — looking back at thymectomy for myasthenia gravis. N Engl J Med. 2016;375:576–7. •• Wolfe GI, Kaminski HJ, Aban IB, et al. Randomized trial of thymectomy in myasthenia gravis. N Engl J Med. 2016;375:511–22 This multicenter, randomized clinical trial provides evidence that thymectomy improves clinical outcomes over a 3-year period in patients with nonthymomatous anti-AChR MG. Yuan HK, Huang BS, Kung SY, Kao KP. The effectiveness of thymectomy on seronegative generalized myasthenia gravis: comparing with seropositive cases. Acta Neurol Scand. 2007;115(3):181–4. Mineo TC, Ambrogi V. Surgical techniques for myasthenia gravis: video-assisted thoracic surgery. Thorac Surg Clin. 2019;29(2):165–75. Beecher G, Anderson D, Siddiqi Z. Subcutaneous immunoglobulin in myasthenia gravis exacerbation: a prospective, open-label trial. Neurology. 2017;89:1–7. Bourque PR, Pringle CE, Cameron W, Cowan J, Chardon JW. Subcutaneous immunoglobulin therapy in the chronic management of myasthenia gravis: a retrospective cohort study. PLoS One. 2016;11:e0159993. Dalakas MC. Immunotherapy in myasthenia gravis in the era of biologics. Nat Rev Neurol. 2019;15(2):113–24. Howard JF, et al. A randomized, placebo-controlled phase II study of eculizumab in patients with refractory generalized myasthenia gravis. Muscle Nerve. 2013;48:76–84. • Howard JF, et al. Safety and efficacy of eculizumab in anti- acetylcholine receptor antibody- positive refractory generalized myasthenia gravis (REGAIN): a phase 3, randomised, doubleblind, placebocontrolled, multicentre study. Lancet Neurol. 2017;16:976–86 A phase III randomised, double-blind and placebo-controlled clinical trial that shows the effectiveness of eculizumab to treat patients with MG and antibodies anti-AChR. Anthony RM, Nimmerjahn F, Ashline DJ, Reinhold VN, Paulson JC, Ravetch JV. Recapitulation of IVIG antiinflammatory activity with a recombinant IgG Fc. Science. 2008;320:373–6. Roopenian DC, Akilesh S. FcRn: the neonatal Fc receptor comes of age. Nat Rev Immunol. 2007;7:715–25. •• Howard JF Jr, Bril V, Burns TM, et al. Randomized phase 2 study of FcRn antagonist efgartigimod in generalized myasthenia gravis. Neurology. 2019;92(23):e2661–73 A phase II, exploratory, randomized, double-blind, placebo-controlled, multicenter study that shows the safety and well tolerance of efgartigimod in patients with generalized MG with antibodies to AChR. Rahbek MA, Mikkelsen EE, Overgaard K, Vinge L, Andersen H, Dalgas U. Exercise in myasthenia gravis: a feasibility study of aerobic and resistance training. Muscle Nerve. 2017;56:700–9. Westerberg E, Molin CJ, Lindblad I, Emtner M, Punga AR. Physical exercise in myasthenia gravis is safe and improves neuromuscular parameters and physical performance-based measures: a pilot study. Muscle Nerve. 2017;56:207–14. Gonzalez NL, Puwanant A, Lu A, Marks SM, Živkovic SA. Myasthenia triggered by immune checkpoint inhibitors: new case and literature review. Neuromuscul Disord. 2017;27:266–8. Lau KH, Kumar A, Yang IH, Nowak RJ. Exacerbation of myasthenia gravis in a patient with melanoma treated with pembrolizumab. Muscle Nerve. 2019;54:157–61. Suzuki S, et al. Nivolumab- related myasthenia gravis with myositis and myocarditis in Japan. Neurology. 2017;89:1–8.