title: Investigation of functional IL-10 gene polymorphism and IL-10 levels in acute graft-versus-host disease.
abstract: BACKGROUND
  Graft-versus-host disease (GVHD) represents a major complication in allogeneic hematopoietic stem cell transplant (allo-HSCT) recipients. Although studies have been conducted concerning the investigation of cytokine polymorphisms in the development of acute GVHD (aGVHD), the contribution of recipients and donors as regards cytokine levels has not yet been thoroughly assessed.
  
  
  OBJECTIVE
  The aim of this study was to investigate the impact of IL-10 polymorphisms on cytokine levels in blood and saliva, in addition to the occurrence and severity of aGVHD.
  
  
  METHODS
  Fifty-eight consecutive allo-HSCT recipients and their donors were included in this prospective study. Saliva and/or blood samples were obtained from recipients and donors to determine IL10 polymorphisms. The IL-10 levels in the blood and saliva were also assessed. The samples were collected from seven days before transplant (day -7) to 100 days after allo-HSCT (day +100), once a week or until the death of recipient.
  
  
  RESULTS
  No association was found between recipient and donor IL10 polymorphism and IL-10 levels in the saliva with aGVHD. In contrast, IL-10 levels in the blood were associated with the occurrence of aGVHD. The high producer phenotype in the recipient was also associated with high levels of IL-10 in the blood and saliva.
  
  
  CONCLUSIONS
  Although IL10 polymorphisms were not associated with the occurrence and severity of aGVHD, the genetic background of the recipient did in fact influence the production of the cytokine. Furthermore, as IL-10 levels in the blood were associated with the disease development, this parameter may well be a useful predictor of aGVHD development.
authors.affiliation: Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
authors.forename: Renata Gonçalves
authors.initials: RG
authors.lastname: Resende
authors.forename: Jeane de Fátima
authors.initials: Jde F
authors.lastname: Correia-Silva
authors.forename: Telma Cristina
authors.initials: TC
authors.lastname: Arão
authors.forename: Tarcília Aparecida
authors.initials: TA
authors.lastname: Silva
authors.forename: Mauro Henrique Nogueira Guimarães
authors.initials: MH
authors.lastname: Abreu
authors.forename: Henrique
authors.initials: H
authors.lastname: Bittencourt
authors.forename: Ricardo Santiago
authors.initials: RS
authors.lastname: Gomez
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D018450:Disease Progression; D005260:Female; D056726:Genetic Association Studies; D006086:Graft vs Host Disease / Q000097:blood / Q000209:etiology / Q000235:genetics* / Q000276:immunology / Q000503:physiopathology; D019337:Hematologic Neoplasms / Q000628:therapy*; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D011183:Postoperative Complications; D012463:Saliva / Q000276:immunology
chemical_list: D016753:Interleukin-10