title: The effect of glutathion S-transferase polymoprhisms and anti-GSTT1 antibodies on allograft functions in recipients of renal transplant.
abstract: The balance between oxidative stress and anti-oxidant defense systems after renal transplantation may explain the development and progression of allograft dysfunction. Glutathione S-transferase (GST) decreases the damage from oxidative stress. In contrast, recipient antibodies against GSTT1 expressed on the graft are believed to cause its dysfunction. The aim of our research was to study the probable relationship to rejection between GST gene polymorphisms and anti-GSTT1 antibodies. We included 122 patients transplantations from living donors and 51 healthy individuals as controls group in our study. The patient groups were comprised of 57 patients who did and 65 who did not experienced rejection episode. Polymerase chain reactions were used to detect GSTM1 and GSTT1 polymorphisms, whereas PCR-RFLP (restriction fragment length polymorphism), for GSTP1 polymorphism. An enzyme-linked immunosorbent assay method was used for anti-GSTT1 antibody scans. There was no significant difference between the groups for allele and genotype frequencies of GSTT1, GSTM1, GSTP1 polymorphisms of the recipients, donors, and controls. Within the rejection group the frequency of patients with the GSTM1 null genotype was higher among subjects prescribed cyclosporine A versus tacrolimus (P = .029). Among the entire patient group, 46 subjects with GSTT1 null genotype were scanned for anti-GSTT1 antibody which was detected in 5 of 8 patients with an acute rejection episode (P = .04). Anti-GSTT1 antibody was observed more frequently albeit not significantly, among the cyclosporine versus tacrolimus patient group (P = .16). This study suggested that GSTM1 genotype may be important for cyclosporine detoxification and for allograft outcomes due to drug nephrotoxicity. After transplantation, antigens distinct from the HLA system such as GSTT1 protein may also be targets for alloimmune responses.
authors: Department of Medical Biology, IU Istanbul Medical Faculty, Istanbul, Turkey. sebahatakgul@gmail.com
authors: S U
authors: SU
authors: Akgul
authors: F S
authors: FS
authors: Oguz
authors: Y
authors: Y
authors: Çalişkan
authors: C
authors: C
authors: Kekik
authors: H
authors: H
authors: Gürkan
authors: A
authors: A
authors: Türkmen
authors: I
authors: I
authors: Nane
authors: F
authors: F
authors: Aydin
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D051549:Glutathione S-Transferase pi / Q000235:genetics; D005982:Glutathione Transferase / Q000235:genetics* / Q000276:immunology*; D006084:Graft Rejection / Q000201:enzymology / Q000209:etiology* / Q000235:genetics / Q000276:immunology; D006085:Graft Survival; D006801:Humans; D007166:Immunosuppressive Agents / Q000009:adverse effects; D007518:Isoantibodies / Q000097:blood*; D016030:Kidney Transplantation / Q000276:immunology*; D019520:Living Donors; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome; D014421:Turkey; D055815:Young Adult
chemical_list: D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase; D007166:Immunosuppressive Agents; D007518:Isoantibodies; C413545:glutathione S-transferase T1; C496556:GSTP1 protein, human