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Lymphoid follicles of different phenotype appear in ileum during involution of the sheep ileal Peyer's patch.

Abstract：

:The ileal Peyer's patch (IPP) of young sheep is a site of diversification of the primary antibody repertoire and where involution takes place at young age. Tissue samples from the ileum were collected in 134 animals aged from 1 month to 6 years, and IPP follicle phenotypes were characterised. We describe a new type of ileal lymphoid follicles that became relatively more frequent during involution, and had numerous intrafollicular T-cells and BAQ44A+ B-cells and large interfollicular T-cell areas. As opposed to classical IPP follicles in which the BAQ44A+ cells were confined to the narrow follicle-neck region, the novel atypical ileal lymphoid follicle had these cells distributed throughout the follicle. The relative distribution of cell types in the typical IPP follicle remained fairly constant during involution. Many animals older than 9 months (64/92) still had had typical IPP follicles and even sheep 4 years and older (5/9) had IPP-type follicles.

journal_name

Dev Comp Immunol

journal_title

Developmental and comparative immunology

authors

Lie KI,Aleksandersen M,Landsverk T

doi

10.1016/j.dci.2004.10.009

keywords:

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

539-53

issue

6

eissn

0145-305X

issn

1879-0089

pii

S0145-305X(04)00178-8

journal_volume

29

pub_type

杂志文章

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