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Loss of HGF activator inhibits foveolar hyperplasia induced by oxyntic atrophy without altering gastrin levels.

Am. J. Physiol. Gastrointest. Liver Physiol.2012 Dec 1;303(11):G1254-61. Epub 2012 Oct 11
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摘要


Spasmolytic polypeptide/trefoil family factor 2 expressing metaplasia (SPEM) is induced by oxyntic atrophy and is known as a precancerous or paracancerous lesion. We now have sought to determine whether hepatocyte growth factor (HGF) influences the development of SPEM and oxyntic atrophy. DMP-777, a parietal cell ablating reagent, was administered to HGF activator (HGFA)-deficient mice and wild-type mice. Gastric mucosal lineage changes were analyzed in the DMP-777 treatment phase and recovery phase. Both wild-type and HGFA knockout mice showed SPEM, and there was no difference in SPEM development. However, after cessation of DMP-777, HGFA-deficient mice showed delayed recovery from SPEM compared with wild-type mice. Foveolar cell hyperplasia and the increase in proliferating cells after parietal cell loss were reduced in HGFA-deficient mice. The HGFA does not affect emergence of SPEM. However, the absence of HGFA signaling causes a delay in the recovery from SPEM to normal glandular composition. HGFA also promotes foveolar cell hyperplasia and mucosal cell proliferation in acute oxyntic injury.

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