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Important functional roles of basigin in thymocyte development and T cell activation.

Abstract：

:Basigin is a highly glycosylated transmembrane protein that is expressed in a broad range of tissues and is involved in a number of physiological and pathological processes. However, the in vivo role of basigin remains unknown. To better understand the physiological and pathological functions of basigin in vivo, we generated a conditional null allele by introducing two loxP sites flanking exons 2 and 7 of the basigin gene (Bsg). Bsg(fl/fl) mice were born at the expected Mendelian ratio and showed a similar growth rate compared with wildtype mice. After crossing these mice with Lck-Cre transgenic mice, basigin expression was specifically inactivated in T cells in the resulting Lck-Cre; Bsg(fl/fl) mice. Although the birth and growth rate of Lck-Cre; Bsg(fl/fl) mice were similar to control mice, thymus development was partially arrested in Lck-Cre; Bsg(fl/fl) mice, specifically at the CD4(+)CD8(+) double-positive (DP) and CD4 single-positive (CD4(+)CD8(-), CD4SP) stages. In addition, CD4(+) T cell activation was enhanced upon Concanavalin A (Con A) or anti-CD3/anti-CD28 stimulation but not upon PMA/Ionomycin stimulation in the absence of basigin. Overall, this study provided the first in vivo evidence for the function of basigin in thymus development. Moreover, the successful generation of the conditional null basigin allele provides a useful tool for the study of distinct physiological or pathological functions of basigin in different tissues at different development stages.

journal_name

Int J Biol Sci

journal_title

International journal of biological sciences

authors

Yao H,Teng Y,Sun Q,Xu J,Chen YT,Hou N,Cheng X,Yang X,Chen ZN

doi

10.7150/ijbs.6818

subject

Has Abstract

pub_date

2013-12-13 00:00:00

pages

43-52

issue

1

issn

1449-2288

pii

ijbsv10p0043

journal_volume

10

pub_type

杂志文章

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