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BÖBREK NAKLİ SONRASINDA VERİCİ HLA ANTİJENLERİNE KARŞI OLUŞAN ANTİKORLARIN AKIM SİTOMETRİSİ İLE ÇAPRAZLAMA YÖNTEMİ İLE SAPTANMASI

DETECTION OF POST TRANSPLANT DONOR SPECIFIC ANTIBODIES AGAINST DONOR HLAANTIGENS BY FLOW CYTOMETRIC CROSS MATCH

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Abstract (2. Language): 
Objective: This study was designed to reveal the clinical importance of Donor Specific Antibody (DSA) formed following renal transplantation, properties of humoral response aganist the graft, graft failure, and the role of antibodies in rejection. Materials and methods: Fifty patients who had renal transplant between March 2001 and Apr›l 2004 were included in this study. T and B Flow Cytometric Cross-Match (FCCM) test was applied to patient sera obtained at the 1st, 7th,and 14th days and 1st, 3rd,6th and 12th months and fresh donor cells were used for this analysis. Results: Thirty-nine (78%) FCCM results were found to be negative, while 11 (22%) patients depicted positive results. DSAs were formed mainly in the first month (82%) while 18% after the first month. Four patients (8%) had T and B FCCM positive while 3 patients (6%) only T FCCM positive and 4 patients (8%) only B cell positive. DSA formation classified as early and late. T and B FCCM positive results correlated well with rejection. There patients depicted graft rejection (18.1%) as well, though T and / or B FCCM negative patients did not result in graft rejection. Apart from the 1st day serum creatinin levels of ≥ 2 mg/dl significantly related with rejection and T and B FCCM positivition 7th and 14th day. Conclusion: DSAevaluation with FCCM in post transplant period relates well with graft survival and quality of life of renal transplanted patients. FCCM results in the 1st post transplant month will likely to shed light to the fate of transplantation.
Abstract (Original Language): 
Amaç:Bu çal›flmada böbrek nakli sonras› oluflan Donör Spesifik Antikor (DSA)’lar›n klinik önemi, grafta karfl› oluflan humoral cevab›n karakteri, graft yetmezli¤i ve rejeksiyonda bu antikorlar›n rolünün de¤erlendirilmesi amaçlanm› flt›r. Gereç ve yöntem: Bu çal›flmaya Mart 2001 - Nisan 2004 aras›nda böbrek transplantasyonu yap›lan 50 hasta dahil edilmifltir. Elli hasta-verici çiftine T›bbi Biyoloji Anabilim Dal›’nda Ak›m Sitometrisi ile ‘’Cross Match’’- Çaprazlama (ASCM) testi uygulanm›flt›r. Nakil sonras› hastalar›n 1., 7., 14. günlere, 1., 3., 6. ve 12. aylara ait serumlar› ve vericilerin taze hücreleri ile T ve B ASCM testi yap›lm›flt›r. Bulgular: 39 hastan›n (%78) sonucu negatifken, 11 hastan›n (%22) test sonucunun pozitif oldu¤u saptanm›flt›r. DSA’lar›n %82’si ilk ay içinde, %18’i ise birinci aydan sonraki dönemde oluflmufltur. Bunlardan 4 (% 8) hastan›n test sonucu hem T, hem de B ASCM (+), 3 (% 6) hastan›n TASCM (+), 4 (% 8) hastan›n da B ASCM sonucu (+) olarak bulunmufltur. Elde edilen antikorlar, nakil sonras› erken ve geç dönemde oluflanlar olmak üzere iki gruba ayr› larak klinik sonucu de¤erlendirilmifltir. Her iki grupta da T ve/veya B ASCM (+) sonuca sahip hastalarda rejeksiyon olufltu¤u görülmüfltür. Ayr›ca hastalar graft yetmezli¤i aç›s›ndan de¤erlendirilmifl ve nakil sonras› T ve/veya B ASCM (+) olan hastalar›n %18,1’inde graft yetmezli¤i varken, T ve/veya B ASCM (-) olan hastalar›n hiçbirisinde graft yetmezli¤i görülmemifltir. Rejeksiyon ile ≥ 2 mg/dl kreatinin düzeyleri aras›ndaki ba¤lant› istatistiksel anlaml› l›k aç›s›ndan de¤erlendirildi¤inde 1. gün d›fl›ndaki tüm sonuçlar anlaml› bulunmufltur. Ayn› kreatinin düzeyinin, T ve/veya B ASCM (+)’li¤i ile aras›ndaki ba¤lant› istatistiksel anlaml›l›k aç›s›ndan de¤erlendirildi¤inde ise, 7. ve 14. günlerdeki sonuçlar anlaml› bulunmufltur. Sonuç: Nakil sonras› ASCM yöntemi ile DSA’lar›n araflt›r›lmas›n›n nakledilen böbre¤in sa¤kal›m›n›, dolay›s›yla hastan›n yaflam kalitesini etkiledi¤i düflüncesindeyiz. Özellikle nakil sonras› ilk bir ay içindeki test sonuçlar› böbre¤ in sa¤kal›m› hakk›nda klini¤i önemli ölçüde ayd›nlatacakt›r.
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