Dergi Ara >>
Yıl:2011; Cilt: 48; Sayı: Özel 2>> Özet
TAM METİN
Nöropsikiyatri Arşivi; 2011;48(Özel 2):64-66
Multipl Sklerozda FDA Onaylı İlk Oral Ajan: Fingolimod
GA Demir
İstanbul Bilim Üniversitesi Tıp Fakültesi Nöroloji Anabilim Dalı, İstanbul, Türkiye
Multipl sklerozda hastalık seyrini etkileyen ilaçlar son 20 yıldır kullanılmaktadır.
Yakın zamana kadar bu ilaçlar sadece injeksiyonla verilebilen interferon beta ve
glatiramer asetat ile sınırlı idi. 2010 yılı sonlarında ilk oral MS ilacı olan Fingolimod
Amerikan İlaç Dairesi (FDA) tarafından onaylanmıştır. Fingolimod pek çok dokuda
olduğu gibi sinir sistemi hücrelerinde ve lenfositlerde bulunan sfingozin-1 fosfat
(S1P) reseptör modülasyonu gerçekleştirerek etki gösterir. Lenfositlerin lenf
nodundan çıkışı için gerekli olan S1P sinyalizasyonunu önleyerek lenfositlerin lenf
nodunda hapsolmasını sağlar ve böylelikle bir lenfopeni hali yaratır. Ancak
lenfosit hasarına yol açmadığı için bu lenfopeni ilacın kesilmesinden sonra kısa
sürede geri dönüşümlüdür. Gerek preklinik gerekse yineleyici MS hastalarında
yürütülen Faz II ve Faz III çalışmalar oldukça yüz güldürücü sonuçlar vermiştir. Faz
III çalışmalarda hem plaseboya karşı hem haftalık interferon beta-1a’ya karşı
atakların önlenmesinde ve MR lezyon yükünün artmasında anlamlı etkisi
gösterilmiştir. Faz II ve Faz III çalışmalarda Fingolimod’un olumlu bir güvenlik
profiline sahip olduğu görülmüştür; bunun uzun vadeli takip çalışmaları ile de
desteklenmesine gereksinim vardır.
The First FDA-Approved Oral Drug for Multiple Sclerosis: Fingolimod
Disease-modifying drugs (DMDs) are being used in multiple sclerosis (MS) for the
last 20 [year]s. Until recently, only interferon beta and glatiramer acetate
preparations were available, which are administered by repetitive injections. In
the last quarter of 2010, the USA Food and Drug Administration (FDA) approved
the first oral DMD, fingolimod. Fingolimod is a modulator of sphingosine-1
phosphate (S1P) receptors which are present in many tissues such as neural
cells and lymphocytes. By inhibiting the S1P signalling which is necessary for
lymphocytes to leave the lymph nodes, it traps lymphocytes within the lymph
nodes causing lymphopenia. However, since it does not harm the lymphocytes,
this lymphophenia is quickly reversible after the drug withdrawal. Both preclinical
studies and Phase II and Phase III studies carried out in patients with relapsing
MS have yielded promising results. In the Phase III trials, fingolimod was
effective both against placebo and weekly interferon beta-1a injections in
preventing relapses and lesion load accumulation. Phase II and Phase III studies
showed that fingolimod has a favorable safety profile; long-term safety needs to
be shown in long-term follow up-studies.

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