TRBV kinetics and its association with HLA disparity and aGVHD following allogeneic hematopoietic stem cell transplantation.
BACKGROUND
The relative expression of T cell receptor (TCR) beta variable (TRBV) and TCR diversity was compared between recipients receiving human leukocyte antigen (HLA)-mismatched transplants and those receiving HLA-matched transplants, using granulocyte colony-stimulating factor (G-CSF)-mobilized peripheral blood stem cells and bone marrow as grafts.


METHODS
The kinetics of the relative expression of TRBV family members were analyzed using real-time quantitative PCR. Additionally, the association of TRBV clonotype with acute graft-versus-host disease (aGVHD) was determined by cloning and sequence analysis of the CDR3 region.


RESULTS
The TCR diversity in recipients receiving HLA-mismatched transplants was significantly lower than in those receiving HLA-matched transplants at 1 month and 2 months after hematopoietic stem cell transplantation (HSCT) (both P < 0.05). However, these differences disappeared 3 months after transplantation. The relative expression of TRBV27 (n = 7 recipients) at the onset of aGVHD was higher than in corresponding donors (P = 0.025), but no significant differences were observed between recipients lacking aGVHD and their donors at serial time points after HSCT.


CONCLUSIONS
Our results suggest that HLA disparity may affect the relative expression of TRBV in the early phase after transplantation, and TRBV27 may be associated with the onset of aGVHD.
Department of Hematology, Peking University First Hospital, Beijing, China.
L
L
Sun
H
H
Ren
W
W
Liu
L
L
Wang
Y
Y
Yin
Y
Y
Li
X
X
Ma
Z
Z
Qiu
X
X
Cen
Y
Y
Shi
D000293:Adolescent; D000328:Adult; D022801:Complementarity Determining Regions / Q000235:genetics*; D005260:Female; D015333:Gene Rearrangement, beta-Chain T-Cell Antigen Receptor / Q000235:genetics / Q000276:immunology*; D006086:Graft vs Host Disease / Q000276:immunology*; D006680:HLA Antigens / Q000276:immunology*; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D007700:Kinetics; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000378:metabolism*
D022801:Complementarity Determining Regions; D006680:HLA Antigens; D016693:Receptors, Antigen, T-Cell, alpha-beta