Abstract:
:The Foxl1 gene, which encodes a winged helix transcriptional regulator, is expressed in the mesenchymal layer of developing and mature gastrointestinal tract. Foxl1-deficient mice exhibit various defects not only in the epithelial layer of the gastrointestinal tract but also in gut-associated lymphoid tissues. In the small intestine of Foxl1-deficient mice, the formation of Peyer's patches is affected, particularly in the caudal region. This alteration is shown to be due to the delayed formation of Peyer's patches organizing centers as revealed by the expressions of VCAM1 and IL-7 receptor alpha-chain at 17.5 days postcoitus. Peyer's patch defects are concordant with the significantly decreased expression of Lymphotoxin beta-receptor in the caudal region of fetal intestine. Foxl1 is suggested to regulate the responsiveness of fetal intestinal mesenchymal cells to inductive signals mediated by Lymphotoxins during Peyer's patch organogenesis. In addition, constitutive outgrowth of colonic patches due to defects in radioresistant stromal components of colonic patches are seen in Foxl1-deficient mice. Because of the functional similarities of hypertrophic colonic patches to those seen in hapten-induced experimental colitis, this hypertrophy is suggested to involve Lymphotoxin beta-receptor signaling. Together, the data suggest that Foxl1 might be involved in cellular responses of gut-associated lymphoid tissues dependent upon the Lymphotoxins/Lymphotoxin beta-receptor axis.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Fukuda K,Yoshida H,Sato T,Furumoto TA,Mizutani-Koseki Y,Suzuki Y,Saito Y,Takemori T,Kimura M,Sato H,Taniguchi M,Nishikawa S,Nakayama T,Koseki Hdoi
10.1016/s0012-1606(02)00088-xsubject
Has Abstractpub_date
2003-03-15 00:00:00pages
278-89issue
2eissn
0012-1606issn
1095-564Xpii
S001216060200088Xjournal_volume
255pub_type
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