T cell receptor (beta chain) transgenic mice have selective deficits in gamma delta T cell subpopulations.

Abstract:

:TCR-beta (T cell receptor-beta chain) transgenic mice have altered lymphocyte development. TCR-beta transgenic mice are hyporesponsive to alloantigens in vivo and are deficient in gamma delta T cells. In order to begin a study of the relationship between a deficiency of alloreactive gamma delta cells and the defective function of in vivo alloantigen recognition, we analysed the gamma delta T cell development in TCR-beta mice. The presence of the TCR-V beta 8.2 chain transgene is associated with inhibition of gamma chain gene rearrangement. In order to determine how the presence of the TCR-beta transgene affects gamma delta T cell development, gamma delta T cells were studied in the skin, intestine and spleen. TCR-beta mice have dramatically reduced numbers of gamma delta T cells in the spleen and moderately reduced numbers of gamma delta T cells among intestinal intraepithelial lymphocytes. In contrast, these mice have normal numbers of gamma delta dendritic epidermal cells (DEC). These selective deficits could be due to the developmental regulation of transgene transcription during fetal life. We examined transcription of the TCR-beta transgene in the fetal thymus and found that the TCR-beta transgene is first transcribed at high levels on day 16 of fetal life, after DEC have already migrated from the thymus to the epidermis. Furthermore, mRNA from the transgene was detected in DEC, ruling out the formal possibility that DEC bear a gamma delta receptor only because they are incapable of expressing the transgene.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Transpl Immunol

journal_title

Transplant immunology

authors

Rimm IJ,Fruman DA,Abhyankar S,Sakamoto H,Orme IM,Milstone D,Seidman JG,Ferrara JL

doi

10.1016/0966-3274(94)90063-9

subject

Has Abstract

pub_date

1994-09-01 00:00:00

pages

218-24

issue

3

eissn

0966-3274

issn

1878-5492

pii

0966-3274(94)90063-9

journal_volume

2

pub_type

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