eculİzumab - tiged.org.tr b/23 nisan/13.30-1… · microsoft powerpoint - sunu1 author:...
TRANSCRIPT
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ECULİZUMAB
DOÇ. DR. NURHAN SEYAHİ
Cerrahpaşa Tıp Fakültesi Nefroloji Bilim Dalı
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ECULİZUMAB
• Fare kaynaklı, insanlaştırılmış
• Monoklonal bütün antikor
• Moleküler ağırlığı 148 kDA
• Yarı ömrü 11 gün
• Kompleman protein C5’e bağlanır
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ECULİZUMAB
• Piyasa adı ve üretici: – Soliris –– Lonza Biologics, New Hemsphire, ABD– Alexion Pharmaceuticals, Connecticut, ABD
• Lisans: – FDA: 16 Mart 2007– EMA: 20 Haziran 2007– Türkiye: Ruhsat başvurusu aşamasında
• Kullanım alanı:– Paroksismal noktural hemoglobuminüri
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ECULİZUMAB
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ECULİZUMAB
• 300 mg / 30mL flakon
• 5 mg/dl olacak şekilde solüsyon hazırlanır ve 35 dakikadan uzun sürede verilir
• Önerilen doz
– 600 mg / 7 gün (4 hafta)
– 900 mg (5. hafta)
– 900 mg (2 haftada bir)
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ECULİZUMAB
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ECULİZUMAB
• Etki mekanizması
– C5 kompleman proteinine bağlanır.
– Böylece C5 konvertaz ile yıkılmasını önler
– Sonuçta membran atak kompleksinin oluşumu engellenir
• Etkili konsantrasyon 35 mikrogram/ml
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ECULİZUMAB
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ECULİZUMAB
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Kompleman ve T hücreleri
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ECULİZUMAB - Kontrendikasyonlar
• Aktif Neisseria Meningitidis infeksiyon
• Neisseria Meningitis için aşılı olmayanlar
• Tedaviden iki hafta önce aşılama yapılmalıdır
• Daha önce aşılanmış olanlarda doktor kararına göre.
• Tedavi boyunca antibiyotik proflaksisi düşünülebilinir.
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ECULİZUMAB – Yan etkiler
• Baş ağrısı
• Nazofarenjit, burun akıntısı
• Sırt ağrısı
• Halsizlik
• Yorgunluk
• Öksürük
• Sinüzit, solunum yolu infeksiyonu
• İnflüenza benzeri tablo, miyalji
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ECULİZUMAB - Hamilelik
• Gebelikte kullanım kategori:C
• Doğum : Veri yok
• Süt verme: veri yok ancak, yeni doğanda Ig’lerin GIS emilim oranı düşük
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ECULİZUMAB – Transplant hastalarında kullanım
• Antikora bağımlı rejeksiyon vakalarında
• HUS vakalarında
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Antikora Bağımlı Rejeksiyon
• Antikor bağımlı rejeksiyon
• Antibody mediated rejection (AMR)
• Humoral rejeksiyon
– C4d (+)
– Anti-donor antikorları
– Morfolojik olarak doku hasarı bulgusu olması
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ECULİZUMAB - AMR
• Erken dönemde ciddi AMR
• Akut böbrek yetmezliği, DSA’da yükselme
– Biyopside fibrin trombozu
– Duyarsızlaştırma yapılan hastaların %5’inde görülüyor
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ECULİZUMAB - AMR
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ECULİZUMAB - AMR
• 20 yaşında erkek
• İlk nakil 10 yaşında
• 2005 yılında Hodgin lenfoma
– Kemik iliği transplantasyonu
• Graft kaybı
• Kardiyomiyopati
• Pulmoner veno-oklüzif hastalık
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ECULİZUMAB - AMR
• Verici Anne
• Flow cross (+), Sitotoksik cross (-)
• DSA (+)
– HLA-A2, B52, DR15/51
• Kan grubu uyumlu
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ECULİZUMAB - AMR
• 3 gün plazmaferez / IVIG (CMV IG 100mg/kg)
• Flow cross match (-)
• Dacluzimab, Tacrolimus, MMF, Steroid
• 3 gün Plazmaferez / IVIG
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ECULİZUMAB - AMR
• Post op 3. gün
• Flow cross match (+), sitotoksik cross (+) → ABY
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ECULİZUMAB - AMR
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ECULİZUMAB - AMR
• Biyopsi, diffüz C4d birikim, C5b-9 birikim, AMR
• Glomerüler ve arteriolerde tromboz
• Eculizumab 600 mg
• Rituximab 375 mg/m2
• 36 saat idrar miktarı artmaya başlar.
• DSA (+) kaldığı için yüksek doz IVIG (2g/kg)
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ECULİZUMAB - AMR
• İkinci biyopsi C5-9 birikimi silinmiş
• DSA yüksek
• Plazmaferez / IVIG
• 28. gün biyopsi AMR geriliyor
• 4. ay fonksiyone graft ile hasta pulmoner venooklüzif hastalığa bağlı pulmoner kanama ile ölüyor.
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ECULİZUMAB - AMR
• ECULİZUMAB TEK BAŞINA DSA’YI DÜŞÜRMEZ ANTİKOR DÜŞÜRÜCÜ BİR TEDAVİ EKLENMELİ
• TEK VAKA BİLDİRİMİNE DAYANAN SONUÇLAR AŞIRI YORUMLANMAMALI
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ECULİZUMAB – AMR
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ECULİZUMAB – AMR
• 43 yaş, kadın
• PRA %100 (7 gebelik)
• Damar erişim yolu problemleri, multipl venöz tromboz (etyoloji ?)
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ECULİZUMAB – AMR
• Bekleme listesine
• IVIG 2g/kg (2 kere)
• Rituximab 375 mg/m2 (1 kere)
• Bortezomib
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ECULİZUMAB – AMR
• Domino nakil şansı
• Sitotoksik cross match (-)
• Flow cross match (+)
• DSA (+)
– Plazmaferez / Bortezumib
– DSA düzeyi azalınca nakil yapılıyor
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ECULİZUMAB – AMR
• Post op 3. gün
– Renal biyopsi
– Diffüz C4d (+)
– DSA nakil öncesi seviyede ancak kreatinin artıyor
– Eculizumab
• 1200 mg takiben 600mg/hafta (4 hafta)
• 1200 mg (12 günde 1, 3 kez)
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ECULİZUMAB – AMR
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ECULİZUMAB – AMR
• Transplantasyonun 6. ayında kreatinin 1mg /dl ve stabil seyrediyor
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ECULİZUMAB - AMR
• Flow B cell cross (+)
– 70 (historik kontrol)
– 3 (çalışma grubu)
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ECULİZUMAB - AMR
• Flow >300: pretransplant PP flow <300 hedef, nakil sonrası 4-7 gün PP
• Flow <300: posttransplant PP (flow>300 olur ise)
• ATG induksiyon TAC + MMF + Steroid
• Eculizmab – Tx günü 1200 mg, takiben 600mg/h 4 hafta DSA>200
ise 1200mg/2 h 9. haftaya kadar.
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ECULİZUMAB - AMR
• Protokol biyopsileri ve DSA takibi 0, 4, 7, 10, 14
• Kontrol grubu: AMR %36
• Eculizumab grubu: DSA 2 hastada yüksek ancak AMR gelişmedi.
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ECULİZUMAB aHUS
• Atipik hemolitik üremik sendrom
– Mikroanjiopati + hemoliz ile seyreder, tipik HUS’dan farklı olarak sıklıkla KBY’ye yol açar
– Kontrolsüz kompleman aktivasyonu
– Faktör H veya Faktör I gibi kompleman sistemi proteinlerini kodlayan genlerde mütasyon
– Nakil sonrası kötü prognoz (%80 1 yıl içinde nüks)
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ECULİZUMAB aHUS Tedavisi
• 25 yaşında, kadın
• aHUS nedeniyle diyaliz tedavisine başlanıyor
• 30 yaşında kadaverik Tx
• 5. haftada HUS nüks, 18 kez plazmaferez ancak graft kaybı
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ECULİZUMAB aHUS Tedavisi
• 37 yaşında 2. nakil (kadaverik)
• 6. haftada HUS nüks
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ECULİZUMAB aHUS Tedavisi
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ECULİZUMAB aHUS Tedavisi
• 8. ay graft sürvisi iyi seyrediyor
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ECULİZUMAB aHUS PROFLAKSİ
• 4 yaş
• aHUS (Faktör H mütasyonuna bağlı)
• 6 yaşında diyaliz tedavisine başlıyor
• 9 yaşında kadaverik renal transplantasyon
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ECULİZUMAB aHUS PROFLAKSİ
• Post op 9 gün boyunca plazmaferez
• 10. gün 600mg Eculizumab
– İdame 600mg/2 hafta
• Nakil sonrası 1. yıl HUS nüksü tespit edilmemiş
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ECULİZUMAB
• Özellike aşırı duyarlı ve AMR için riskli hastalarda
• aHUS vakalarında
• Umut verici bir tedavi olarak gözükmektedir