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Yıl:2011; Cilt: 48; Sayı: Özel 2>> Özet
TAM METİN
Nöropsikiyatri Arşivi; 2011;48(Özel 2):73-78
Multipl Skleroz Patogenezinde B Hücrelerinin Rolü ve B Hücre Karşıtı Monoklonal Antikor Tedavileri
E Tüzün
İstanbul Üniversitesi İstanbul Tıp Fakültesi, Nöroloji Anabilim Dalı, İstanbul, Türkiye
Multipl skleroz (MS) lezyonlarında ve beyin-omurilik sıvısı (BOS) örneklerinde
saptanan B hücresi, plazma hücresi ve artmış immunglobulin (Ig) düzeyleri MS
patogenezinde hümoral immünitenin önemli rol oynadığını düşündürmektedir.
Ayrıca BOS B lenfosit ve Ig düzeyleri ile hastalığın klinik seyri ve prognozu
arasında korelasyon olduğunun gösterilmesi bu görüşü desteklemiştir. Ancak B
hücrelerini hedefleyen monoklonal antikorlarla yapılan klinik çalışmalara kadar B
lenfositlerinin MS patogenezindeki rolüne şüpheyle yaklaşılmıştır. Başta kimerik
anti-CD20 monoklonal antikoru rituksimab olmak üzere çeşitli monoklonal
antikorlarla yapılan klinik çalışmalar, B hücre tüketiminin, MS olgularının atak
sıklığını, özürlülük gelişimini ve kontrast tutan yeni MR lezyonu oluşumunu belirgin
derece azalttığını göstermiştir. Geliştirilmekte ve denenmekte olan yeni antikor ve
füzyon proteinleri ile önümüzdeki yıllarda daha etkin ve daha düşük yan etki
profilli tedavi yöntemlerinin geliştirilmesi beklenmektedir.
The Role of B Cells in Multiple Sclerosis Pathogenesis and Monoclonal Antibody Treatments Targeting B Cells
The presence of B cells, plasma cells and increased immunoglobulin (Ig) levels in
multiple sclerosis (MS) lesions and cerebrospinal fluid (CSF) samples has
suggested that the humoral immunity plays an important role in MS pathogenesis.
Moreover, the demonstration of correlation of CSF B lymphocyte and Ig levels
with the clinical course and prognosis of the disease has substantiated this
notion. However, until the advent of clinical trials performed with B cell-targeting
monoclonal antibodies, the role of B lymphocytes in MS pathogenesis has been
a matter of controversy. Clinical trials testing the chimeric anti-CD20 monoclonal
antibody rituximab and other monoclonal antibodies have shown that B-cell
depletion significantly decreases MS relapse rate, disability progression and
development of new contrast-enhancing MRI lesions. With the introduction of
novel antibodies and fusion proteins that are currently being produced and
tested, treatment methods with higher efficacy and lower side-effect profile are
expected to be developed in the forthcoming [year]s.

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