Böbrek nakli bekleme listesindeki hastalarda anti-HLA antikorlarının tanımlanması

Amaç: Kronik böbrek yetmezliğinin kesin tedavisinin böbrek nakli olduğu bilinmektedir. Bu yüzden böbrek nakil bekleme listesindeki hastaların nakil şansını düşüren veya nakil sonrası rejeksiyona sebep olabilen anti-HLA antikorlarının profillerinin çok iyi belirlenmesi gerekmektedir. Anti-HLA antikorlarının panel reaktif tarama ve tanımlama testlerinin sonuçlarına göre uygun donör seçilebilmekte, yüksek oranda duyarlılaşmış hastaların bile nakil şansı arttırılabilmektedir. Bu çalışmanın amacı, panel reaktif sınıf I ve sınıf II antikor tarama test sonuçları pozitif olan kronik böbrek yetmezliği tanısı konulan hastaların antikorlarını tanımlayarak profillerini ortaya koymaktadır. Gereç ve Yöntemler: Kronik böbrek yetmezliği tanısı ile laboratuvarımıza başvuran ve panel reaktif antikor tarama test sonuçları pozitif çıkan 150 hastanın serum örnekleri antikor tiplerinin tanımlanması için kullanıldı. 54 hasta yüksek oranda duyarlılaşmış olarak değerlendirildi. 96 hastanın antikor profilleri Luminex'e dayalı yöntemle tanımlandı. Lifecodes CI/II ID Kitleri kullanıldı ve çalışma prosedürü firmanın talimatlarına göre gerçekleştirildi. Bulgular: En fazla tespit edilen sınıf I anti-HLA antikorları A2 (%11,6), B7 (%5,2), sınıf II anti-HLA antikorları ise DR4 ve DR7 (%9,9) olduğu belirlendi. Ayrıca kadınlarda en çok DR4 (%12,4), erkeklerde ise DR11 (%9,7) tespit edildi. Hem kadın hem de erkek hastalarda en sık tespit edilen sınıf I antikoru ise A2 olarak tanımlandı (sırasıyla %11,5 ve %12,9). Sonuç: Elde edilen sonuçlar, toplumdaki antijen frekanslarıyla ilgili çalışmaların sonuçlarıyla karşılaştırıldığında, birbirilerine paralel olduğu belirlendi. Fakat çalışmamızda yüksek oranda tanımlanan bazı antikorların (A33, A68, B7, DR9, DR10, DR8, DR17, DQ9, DR1) toplumda nadir görülen antijenlere karşı geliştirildiği tespit edildi. Bu HLA antijenlerinin diğerlerine göre daha antijenik olabileceğinin göz önünde bulundurulması gerektiğini düşünmekteyiz.

Identification of anti-HLA antibodies of patients in kidney transplantation waiting list

Aim: It is known that the absolute treatment of chronic renal failure is renal transplantation. Therefore anti-HLA antibody profiles of the patients which can cause rejections after transplantation or diminish the transplantation chance of the patients in kidney waiting list should be broadly identified. According to the panel reactive screening and identification test results appropriate donor can be choosen and the transplantation chance of the highly sensitized patients can be diminished. The aim of this study is the detection of the antibody profiles of chronic renal failure patients whose panel reactive class I and class II antibody screening test results were positive.Material and Methods: In this study the blood samples of 150 chronic renal failure patients who were consulted to our laboratory and had positive panel reactive antibody positive test results were taken and the sera of the patients were obtained. 54 patients were evaluated as highly sensitized. Antibody profiles of 96 patients were identified by Luminex based methods. Lifecodes CI/II ID Kits were used and procedures were perfomed according to the instructions manuel. Results: According to results the most detected class I antibodies were against A2 (%11,6), B7 (%5,2), class II antibodies were against DR4 ve DR7 (%9,9) antigens. Moreover, DR4 (%12,4) and DR11(%9,7) were identified mostly in women and men, respectively. The most frequent detected class I antibody in both women and men patients were identified as A2 (%11,5 and %12,9, respectively). Discussion: It was estimated that the results were in parallel with the antigen frequency studies in Turkish population. But it was detected that some of the antibodies were produced against rare antigens in population (A33, A68, B7, DR9, DR10, DR8, DR17, DQ9, DR1). Thus it should be considered that these antigens could be more antigenic than the others.

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