title: Association of IL-17 gene polymorphisms and serum level with graft versus host disease after allogeneic hematopoietic stem cell transplantation.
abstract: BACKGROUND
  Cytokines are important factors determining the outcome of transplantation. Host ability in cytokine production may be affected by cytokine genes polymorphisms. The aim of the present study was to investigate the effect of IL-17 gene polymorphisms on outcome of Hematopoietic stem cell transplantation.
  
  
  METHODS
  A total of 60 bone marrow recipients were included in this study. Twenty-five recipients (41.66%) underwent a GVHD. IL-17 gene polymorphisms were evaluated by PCR-RFLP method and the serum levels were also checked by ELISA.
  
  
  RESULTS
  No significant differences in distribution of the IL-17(A/G) (rs3819025) genotypes and alleles were observed between two groups. But, IL-17 (A/G, -197) GG genotype was found to be significantly higher in GVHD group compared to those of non-GVHD group (P = 0.04). Interestingly, after stratification of patients according severity of GVHD, IL-17 (rs3819025) G allele was remained significantly higher in GVHD grade (0-I) group compared to those of grade (II-IV) group (P = 0.05). In addition, after categorization of patients according to their sex, IL-17-197 GG genotype showed a significant association with non-GVHD in male patients (P = 0.05). IL-17 serum levels did not show any significant difference between GVHD and non GVHD groups.
  
  
  CONCLUSIONS
  Results indicated that IL-17197 GG genotype, G allele of (rs3819025) and its serum level have predictive values for severity of GVHD. Also, IL-17-197 GG genotype is a sex dependent genetic risk factor for development of GVHD, but this subject need to be studied in different population.
authors: Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. Electronic address: Karimimh@sums.ac.ir.
authors: Mohammad Hossein
authors: MH
authors: Karimi
authors: Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
authors: Sanaz
authors: S
authors: Salek
authors: Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. Electronic address: rayaviro@yahoo.com.
authors: Ramin
authors: R
authors: Yaghobi
authors: Hematology Research Center and Bone Marrow Transplant Unit, Shiraz University of Medical Sciences, Shiraz, Iran.
authors: Mani
authors: M
authors: Ramzi
authors: Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
authors: Bita
authors: B
authors: Geramizadeh
authors: Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
authors: Sara
authors: S
authors: Hejr
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D016026:Bone Marrow Transplantation; D002648:Child; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006086:Graft vs Host Disease / Q000235:genetics* / Q000276:immunology; D006239:Haplotypes / Q000235:genetics; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D020381:Interleukin-17 / Q000097:blood / Q000235:genetics*; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012737:Sex Factors; D055815:Young Adult
chemical_list: C508717:IL17A protein, human; D020381:Interleukin-17
keywords: GVHD; Gene polymorphism; Hematopoietic stem cell transplantation; IL-17