Takrolimus Ölçüm Yöntemleri
Özet
"Güncel Biyokimya Çalışmaları II" kitabının bu bölümünde, Uzm. Dr. Andaç Uzdoğan tarafından kaleme alınan ve organ nakillerinde yaygın olarak kullanılan bir immünsupresan olan takrolimusun terapötik ilaç düzeyi takip yöntemleri ayrıntılı biçimde incelenmektedir. Streptomyces tsukubaensis'ten elde edilen ve T-hücre aktivasyonunu engelleyen bu makrolid türevi ilaç, dar terapötik aralığı sebebiyle yüksek dozlarda nefrotoksisite ve nörotoksisite gibi toksik etkilere, düşük dozlarda ise akut organ reddine yol açabilmektedir. Bu doğrultuda hastaların klinik takibinde EDTA'lı tam kanda rutin olarak yürütülen ilaç düzeyi ölçümleri büyük bir hayati önem taşımaktadır. Yazıda, takrolimus seviyelerinin tayininde kullanılan EMIT, ACMIA, CMIA ve ECLIA gibi immünolojik yöntemler ile LC-MS/MS kromatografik tekniği karşılaştırmalı olarak ele alınmaktadır. İmmünolojik metotların metabolit çapraz reaksiyonları ve interferanslar nedeniyle yanlış yüksek veya düşük sonuçlar verme riski taşıdığı belirtilirken, yüksek sensitivite ve spesifite sunan LC-MS/MS yönteminin interferansı önlemesi sebebiyle önerilen standart olduğu vurgulanmaktadır. Ayrıca, yöntemin finansal bütçe ve yetişmiş personel gereksinimleri ile takrolimus ölçümlerini ve farmakokinetiğini etkileyen preanalitik faktörler ve ilaç etkileşimleri detaylandırılmaktadır.
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