Publication: Pretransplant gelişmiş Hla sınıf I ve II panel reaktif antikorların böbrek allogrefti üzerine klinik ve patolojik düzeyde etkileri
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AMAÇ: Böbrek nakli öncesi gelişmiş ve tepe-PRA düzeyleri kullanılarak değerlendirilen anti-HLA
Sınıf-I ve II antikorlarının, klinik sonlanımlar ve histopatolojik düzeyde allogreft üzerine olan etkileri
araştırıldı.
GEREÇ ve YÖNTEMLER: Merkezimizde böbrek nakli olan 111 hastanın verileri geriye dönük olarak
değerlendirildi. Tepe-PRA düzeyinin >%15 olması, HLA Sınıf-I ve/veya Sınıf-II antikorlar için pozitif
kabul edildi. Lenfosit çapraz karşılaştırma (LÇK) ve PRA düzeyi ölçümlerinde akım sitometri yöntemi
kullanıldı. Preoperatif bütün hastalarda LÇK negatifti. Histopatolojik olarak allogreft biyopsileri Banff
2011 kriterlerine göre HLA antikorların etkileri açısından değerlendirildi.
BULGULAR: PRA Sınıf-I %21,5, PRA Sınıf-II ise %22,5 hastada pozitifti. PRA Sınıf-II pozitif
hastalar, negatif olanlarla kıyaslandığında anlamlı olarak greft kaybı (p=0,028), ölüm-dışı greft kaybı
(p=0,008), akut rejeksiyon (p=0,016) ve kronik rejeksiyon gelişimi (p=0,029) daha fazla bulundu.
Histopatolojik olarak, PRA Sınıf-II pozitif olan hastalarda, negatif olanlara göre peritubular kapillerit
skorunun daha yüksek (0,44±0,78’e karşı 1,55±1,12, p=0,008) ve glomerülit+peritubular kapillerit
skorunun ≥2 olan hastaların daha fazla olduğu bulundu (%64’e karşı %36, p=0,026). PRA Sınıf-I ve
PRA Sınıf I+II pozitif olanlarda ise klinik veya histopatolojik düzeyde negatif olanlara göre anlamlı bir
farklılık yoktu.
SONUÇ: Böbrek nakli öncesi PRA yöntemi ile saptanmış HLA Sınıf-II antikoru olan hastalar, LÇK
negatif olsa bile allogreft rejeksiyonu ve azalmış greft sağ kalımı riski taşırlar.
OBJECTIVE: The aim of the study was to investigate the influence of preformed anti-HLA antibodies that are represented by peak PRA levels on clinical and histopathologic outcomes of kidney allograft. MATERIAL and METHODS: The study was a retrospective cohort that consisted of 111 kidney transplant recipients. A peak PRA level greater than 15% was accepted positive for HLA class I and II antibodies. Flow cytometric assay was used for PRA and lymphocyte cross-match (LCM). All recipients were LCM negative. Allograft biopsies were indication biopsy and evaluated according to Banff 2011 criteria to investigate the influence of HLA antibodies. RESULTS: PRA was positive in 21.5% of patients for Class-I and 22.5% for Class-II antibodies. PRA Class-II positive patients had significantly more graft failure (p=0.028), death censored graft failure (p=0.008), acute rejection (p=0.016) and chronic rejection (p=0.029). Regarding the pathological evaluation, peritubular capillaritis score was significantly higher in PRA Class-II positive patients (0.44±0.78 vs. 1.55±1.12, p=0.008) and more patients had a glomerulitis+peritubular capillaritis score ≥2 (64% vs. 36%, p=0.026). These significant clinical and pathological outcomes were not observed for PRA Class-I and PRA Class I+II positive patients. CONCLUSION: Preformed anti-HLA Class-II antibodies are responsible for increased allograft rejection and reduced graft survival despite the negative flow cytometric lymphocyte crossmatch in kidney transplantation.
OBJECTIVE: The aim of the study was to investigate the influence of preformed anti-HLA antibodies that are represented by peak PRA levels on clinical and histopathologic outcomes of kidney allograft. MATERIAL and METHODS: The study was a retrospective cohort that consisted of 111 kidney transplant recipients. A peak PRA level greater than 15% was accepted positive for HLA class I and II antibodies. Flow cytometric assay was used for PRA and lymphocyte cross-match (LCM). All recipients were LCM negative. Allograft biopsies were indication biopsy and evaluated according to Banff 2011 criteria to investigate the influence of HLA antibodies. RESULTS: PRA was positive in 21.5% of patients for Class-I and 22.5% for Class-II antibodies. PRA Class-II positive patients had significantly more graft failure (p=0.028), death censored graft failure (p=0.008), acute rejection (p=0.016) and chronic rejection (p=0.029). Regarding the pathological evaluation, peritubular capillaritis score was significantly higher in PRA Class-II positive patients (0.44±0.78 vs. 1.55±1.12, p=0.008) and more patients had a glomerulitis+peritubular capillaritis score ≥2 (64% vs. 36%, p=0.026). These significant clinical and pathological outcomes were not observed for PRA Class-I and PRA Class I+II positive patients. CONCLUSION: Preformed anti-HLA Class-II antibodies are responsible for increased allograft rejection and reduced graft survival despite the negative flow cytometric lymphocyte crossmatch in kidney transplantation.
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Tıp, Sağlık Bilimleri, Dahili Tıp Bilimleri, İç Hastalıkları, Nefroloji, Medicine, Health Sciences, Internal Medicine Sciences, Internal Diseases, Nephrology, ÜROLOJİ VE NEFROLOJİ, Klinik Tıp, Klinik Tıp (MED), UROLOGY & NEPHROLOGY, CLINICAL MEDICINE, Clinical Medicine (MED), Üroloji, Urology, Kidney transplantation, Panel reactive antibody, Flow cytometry, DONOR-SPECIFIC ANTIBODIES, RENAL-TRANSPLANTATION, CROSS-MATCHES, GRAFT FAILURE, RISK, RECIPIENTS, Kidney transplantation, Panel reactive antibody, Flow cytometry, Böbrek nakli, Panel reaktif antikor, Akım sitometri
Citation
Ruhi C., Tugcu M., Kasapoglu U., Boynuegri B., Gumrukcu G., ATA P., Apaydin S., Titiz M. I., "The Influence of Preformed HLA Class I and II Panel Reactive Antibodies on Clinical and Pathological Outcomes of Kidney Allograft", TURKISH NEPHROLOGY DIALYSIS AND TRANSPLANTATION JOURNAL, cilt.25, sa.1, ss.73-78, 2016
