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Restricted V(H) gene usage in lamina propria B cells producing anticolon antibody from patients with ulcerative colitis.

Abstract：

BACKGROUND AND AIMS:Autoimmune responses against colonic epithelium may play a role in the development of colonic inflammation associated with ulcerative colitis (UC). In this study, we established and characterized B-cell lines and clones that produced anticolon antibody from inflamed colonic mucosa of UC subjects. METHODS:B-cell lines were generated through Epstein-Barr virus transformation of lamina propria lymphocytes (LPLs) from colonic mucosa and peripheral blood lymphocytes, and these lines were screened for the production of anticolon antibodies. B-cell lines were then cloned by limiting dilution culture, and messenger RNA expression of immunoglobulin heavy-chain variable region (V(H)) was assessed. RESULTS:V(H) gene families used in B-cell lines established from LPLs of normal controls were diverse, and B-cell lines from UC LPLs expressed a restricted V(H)3 family usage. All 15 clones from UC used a restricted V(H)3 gene family, whereas diverse V(H) gene families were used by 24 clones from normal controls. The analysis of nucleotide sequences indicated that these clones were derived from various germline gene segments. CONCLUSIONS:The restricted V(H) gene usage in anticolon autoantibodies producing B-cell clones suggests that a particular antigenic stimulus contributes to the pathogenesis of UC.

journal_name

Gastroenterology

journal_title

Gastroenterology

authors

Inoue N,Watanabe M,Sato T,Okazawa A,Yamazaki M,Kanai T,Ogata H,Iwao Y,Ishii H,Hibi T

doi

10.1053/gast.2001.25477

keywords:

subject

Has Abstract

pub_date

2001-07-01 00:00:00

pages

15-23

issue

1

eissn

0016-5085

issn

1528-0012

pii

S0016508501360791

journal_volume

121

pub_type

杂志文章

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