Disappearance of clonally expanded T cells after allogeneic leukocyte immunotherapy in peripheral blood of patients with habitual abortion.
Allogeneic leukocyte immunotherapy is often used to improve fertility of patients with habitual abortion (HA), which probably acts through immune-mediated mechanisms. However, the involvement of T cells is not clear. This study examined the effect of allogeneic immunotherapy on T cells of patients with HA. Peripheral blood mononuclear cells were obtained from 5 healthy women and 14 women with HA. RNA was isolated from mononuclear blood cells. Reverse transcription-polymerase chain reaction (RT-PCR), followed by single-strand conformational polymorphism (SSCP) were used to analyze the gene segments of T-cell receptor beta chain (TCRbetaV) variable regions. Oligoclonal accumulation of T cells was identified in peripheral blood of nonpregnant patients with a history of HA. It was also revealed, however, that immunostimulation reduced the number of accumulating T-cell clones (p = 0.0004). The results, together with the clinical effectiveness of immunotherapy, suggest that accumulation of T-cell clonotypes, which probably resulted from antigenic stimulation, is involved in the pathogenesis of HA.
Masuko-Hongo
K
K
Rheumatology, Immunology and Genetics Program, Institute of Medical Science, Kanagawa, Japan.
Hayashi
K
K
Yonamine
K
K
Tokuyama
M
M
Nishioka
K
K
Kato
T
T
D000026:Abortion, Habitual / Q000097:blood / Q000276:immunology* / Q000628:therapy*; D019264:Adoptive Transfer; D000328:Adult; D000595:Amino Acid Sequence; D002999:Clone Cells; D005260:Female; D006801:Humans; D007279:Injections, Subcutaneous; D008213:Lymphocyte Activation; D017710:Lymphocyte Transfusion; D008297:Male; D008969:Molecular Sequence Data; D018807:Polymorphism, Single-Stranded Conformational; D011247:Pregnancy; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism
D016693:Receptors, Antigen, T-Cell, alpha-beta