title: Evaluation of the effect of transplant-related factors and tissue injury on donor-derived hepatocyte and gastrointestinal epithelial cell repopulation following hematopoietic cell transplantation.
abstract: The aim of this study was to detect donor-derived hepatocytes and gastrointestinal epithelial cells in recipients of sex-mismatched allogeneic hematopoietic cell transplants, and to assess the effect of tissue injury on the extent of the repopulation. A total of 29 paraffin-embedded biopsy samples were reviewed. Double labeling by immunohistochemistry and fluorescence in situ hybridization was performed. Eighty-nine percent of sex-mismatched samples with histologic evidence of injury demonstrated the presence of donor-derived hepatocytes and gastrointestinal epithelial cells (mean 2.4%). None of the hepatocytes and gastrointestinal epithelial cells in samples obtained from female recipients with female donors showed a Y chromosome signal. The proportion of donor-derived hepatocyte and gastrointestinal epithelial cells in samples with severe graft-versus-host disease was greater than that of samples with mild/moderate graft-versus-host disease (P = 0.09). No relationship between the source of stem cells and the population rate was detected (P > 0.05). We conclude that some recipient hepatocytes and gastrointestinal tract epithelial cells are replaced by donor-derived cells during tissue injury. The severity of tissue injury seems to influence on the extent of this repopulation.
authors.affiliation: Department of Gastroenterology, Ankara University School of Medicine, Ibn'i Sina Hospital, Sihhiye, Ankara, Turkey. idilman@dialup.ankara.edu.tr
authors.forename: R
authors.initials: R
authors.lastname: Idilman
authors.forename: I
authors.initials: I
authors.lastname: Kuzu
authors.forename: E
authors.initials: E
authors.lastname: Erden
authors.forename: M
authors.initials: M
authors.lastname: Arat
authors.forename: E
authors.initials: E
authors.lastname: Soydan
authors.forename: I
authors.initials: I
authors.lastname: Soykan
authors.forename: G
authors.initials: G
authors.lastname: Akyol
authors.forename: S
authors.initials: S
authors.lastname: Karayalcin
authors.forename: H
authors.initials: H
authors.lastname: Akan
authors.forename: M
authors.initials: M
authors.lastname: Beksac
mesh_terms: D000293:Adolescent; D000328:Adult; D041322:Chromosomes, Human, Y; D004848:Epithelium / Q000293:injuries / Q000473:pathology; D005260:Female; D041981:Gastrointestinal Tract / Q000293:injuries / Q000473:pathology*; D006086:Graft vs Host Disease / Q000209:etiology / Q000473:pathology*; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects; D022781:Hepatocytes / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D018183:Transplantation Chimera