Ultrastructural study on the differentiation and the fate of M cells in follicle-associated epithelium of rat Peyer's patch.

Ultrastructural study on the differentiation and the fate of M cells in follicle-associated epithelium of rat Peyer's patch. Research Abstract Details 

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Ultrastructural study on the differentiation and the fate of M cells in follicle-associated epithelium of rat Peyer's patch. Abstract Text:

Sachiko Onishi,Toshifumi Yokoyama,Keigi Chin,Midori Yuji,Tetsurou Inamoto,Wang-Mei Qi,Katsuhiko Warita,Nobuhiko Hoshi,Hiroshi Kitagawa,Sachiko Onishi,Toshifumi Yokoyama,Keigi Chin,Midori Yuji,Tetsurou Inamoto,Wang-Mei Qi,Katsuhiko Warita,Nobuhiko Hoshi,Hiroshi Kitagawa,

The differentiation process of immature microvillous epithelial cells to M cells and the fate of M cells in the follicle-associated epithelium (FAE) of the mucosa-associated lymphoid tissues are still unclear. In this study, the differentiation process and the fate of M cells were clarified in rat Peyer's patches under a transmission electron microscope. Almost all immature epithelial cells were found to possess long, slender microvilli, which gradually shortened, thickened and dispersed as the immature epithelial cells migrated away from the crypt orifices. These morphological changes started in the centers and moved to the peripheries of the apical surfaces of epithelial cells, accompanied by the protrusion of apical cytoplasm out of the terminal web. During these changes, the bundles of microfilaments of microvilli never shortened, and both small vesicles in the apical cytoplasm and tiny invaginations of the apical membranes were found. The intraepithelial migrating cells gradually accumulated to form typical intraepithelial pockets. In all FAE, there was no morphological sign of cell death in M cells. The rearrangement of microfilament bundles, the reconstruction of microvilli and the disappearance of pockets resulted in the transformation of M cells into microvillous epithelial cells. These serial ultrastructural changes suggest that M cells are a temporal and transitional cell type caused by the active engulfment of luminal substances and that when the engulfment ceases, the M cells transform into mature microvillous epithelial cells.

Ultrastructural study on the differentiation and the fate of M cells in follicle-associated epithelium of rat Peyer's patch. Publishing Authors By Initials

S Onishi,T Yokoyama,K Chin,M Yuji,T Inamoto,WM Qi,K Warita,N Hoshi,H Kitagawa,S Onishi,T Yokoyama,K Chin,M Yuji,T Inamoto,WM Qi,K Warita,N Hoshi,H Kitagawa,

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Ultrastructural study on the differentiation and the fate of M cells in follicle-associated epithelium of rat Peyer's patch. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: The Journal of veterinary medical science / the Ja

VOLUME: 69

Page Numbers: 501-8

Journal Abbreviation: J. Vet. Med. Sci.

ISSN: 0916-7250

DAY: 6

MONTH: May

YEAR: 2007

Ultrastructural study on the differentiation and the fate of M cells in follicle-associated epithelium of rat Peyer's patch. Information

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LANGUAGE: eng

NlmUniqueID: 9105360

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Grant and Affiliation Information for Ultrastructural study on the differentiation and the fate of M cells in follicle-associated epithelium of rat Peyer's patch.

AFFILIATION: Department of Bioresource and Agrobiosciences, Graduate School of Science and Technology, Kobe University, Kobe, Japan.

Country: Japan

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MEDLINETA: J Vet Med Sci

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