Surface molecules essential for positive selection are retained but interfered in thymic epithelial cells after monolayer culture.

Abstract:

:It has been reported that the three-dimensional structure of thymic epithelial cells (TECs) is responsible for thymic positive selection but that this ability disappears when TECs are cultured in monolayer. These results have supported the hypothesis that certain TEC-specific molecules are extinguished during monolayer culture. In this study, using MHC class II-restricted T-cell receptor transgenic mice, we demonstrated that preselected CD4(+)8(+) (DP) thymocytes were inhibited from developing into CD4(+)8(-) (CD4SP) cells in reaggregate thymus organ culture with monolayer-cultured TECs, but this inhibition was removed when TECs were cultured in monolayer with protein synthesis inhibitor or when the cultured TECs were treated with fixative. These results seem to be inconsistent with the previous hypothesis and indicate that monolayer culture allows TECs to retain the surface molecules necessary for positive selection but interferes with their function, which must be sustained for three dimensional structure.

journal_name

Cell Immunol

journal_title

Cellular immunology

authors

Sato T,Sato C,Suzuki D,Yoshida Y,Nunomura S,Matsumura T,Hozumi K,Habu S

doi

10.1006/cimm.2001.1823

subject

Has Abstract

pub_date

2001-07-10 00:00:00

pages

71-9

issue

1

eissn

0008-8749

issn

1090-2163

pii

S0008-8749(01)91823-4

journal_volume

211

pub_type

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