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The T Cell Receptor Repertoire Diversity Following Hematopoietic Stem Cell Transplantation Publisher Pubmed



Zamani F1 ; Mirfakhraie R1 ; Nodehi SRS2 ; Mollaeikandelous Y3 ; Jafari H4 ; Farahmand M5 ; Rezaei F5 ; Teymoorirad M5 ; Movafagh A1, 6
Authors
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Authors Affiliations
  1. 1. Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  2. 2. Hematology and Medical Tehran Oncology Ward, Department of Internal Medicine, Cancer Research Center, Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
  4. 4. Firoozgar Clinical Research Development Center (FCRDC), Iran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  6. 6. Cancer Control Research Center, Cancer Control Foundation, Iran University of Medical Sciences, Tehran, Iran

Source: Iranian Journal of Allergy# Asthma and Immunology Published:2022


Abstract

Immune reconstitution after hematopoietic stem cell transplantation (HSCT) with a conditioning regimen has appeared to be a promising treatment for autoimmune diseases and hematologic malignancies. This study aimed to assess the T cell receptor (TCR) repertoire diversity in CD4+ cells of patients with hematological malignancies who received allogeneic or autologous HSCT. The diversity of the TCR repertoire was evaluated in 13 patients with hematologic malignancies before and four months after HSCT. Amino acid changes in the 25 Vβ families were evaluated using Spectratyping and data were presented as Hamming distance (HD). HD more than 20% was considered a change in TCR repertoire after HSCT. The mean HD was significantly changed after transplantation in all Vβ gene families, with most amino acid changes in p4 and p22 families. There was a strong negative correlation between the HD as the index of TCR repertoire and age (r=−0.62,). The results revealed no association between HD mean and parameters such as sex, disease, conditioning regimen, and type of transplantation. Our data revealed that commonly used conditioning regimens in Iran could successfully cause TCR repertoire diversity in patients with hematologic malignancies in the short term. The amount of change in TCR repertoire was inversely correlated with the increasing age of patients. © 2022 Zamani et al. Published by Tehran University of Medical Sciences.