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Bmp2 -driven terminal differentiation of the stomach epithelium is induced by an autocrine Bmp2 positive feedback loop and inhibited by H. pylori via Interferon gamma signaling [microarray]

ABSTRACT: We find that Bmp2 expression in the surface epithelium of the stomach provides a decisive, dominant fate-determining signal in the gland resulting in terminal differentiation. Terminal differentiation is induced by Bmp2 expression controlled by Bmp2 itself, creating an auto- and paracrine loop that maintains the cells in the differentiated state. Infection with H. pylori leads to a loss of stromal and epithelial Bmp2 expression resulting in gland hyperplasia and impaired differentiation. We demonstrate that Interferon gamma blocks endogenous Bmp2 expression and therefore Bmp2 signaling. Its effect on differentiated cells via Bmp2 inhibition maintains plasticity in this compartment, allowing for recruitment of differentiated cells to the stem cell pool, accounting for the rearrangement of stem cell compartment and increased plasticity in the epithelium in the context of epithelial damage in the gastrointestinal tract.

ORGANISM(S): Mus musculus

PROVIDER: GSE136658 | GEO | 2021/11/29

REPOSITORIES: GEO

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Bmp2 -driven terminal differentiation of the stomach epithelium is induced by an autocrine Bmp2 positive feedback loop and inhibited by H. pylori via Interferon gamma signaling [RNA-seq]

Project description:We find that Bmp2 expression in the surface epithelium of the stomach provides a decisive, dominant fate-determining signal in the gland resulting in terminal differentiation. Terminal differentiation is induced by Bmp2 expression controlled by Bmp2 itself, creating an auto- and paracrine loop that maintains the cells in the differentiated state. Infection with H. pylori leads to a loss of stromal and epithelial Bmp2 expression resulting in gland hyperplasia and impaired differentiation. We demonstrate that Interferon gamma blocks endogenous Bmp2 expression and therefore Bmp2 signaling. Its effect on differentiated cells via Bmp2 inhibition maintains plasticity in this compartment, allowing for recruitment of differentiated cells to the stem cell pool, accounting for the rearrangement of stem cell compartment and increased plasticity in the epithelium in the context of epithelial damage in the gastrointestinal tract.

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Bmp2 -driven terminal differentiation of the stomach epithelium is induced by an autocrine Bmp2 positive feedback loop and inhibited by H. pylori via Interferon gamma signaling

Project description:Bmp2 -driven terminal differentiation of the stomach epithelium is induced by an autocrine Bmp2 positive feedback loop and inhibited by H. pylori via Interferon gamma signaling

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Effect of Mirn378 overexpression on gene expression during C2C12 myogenic and BMP2-induced osteogenic differentiation

Project description:Background: MicroRNAs (miRNAs) are a family of small, non-coding single-stranded RNA molecules involved in post-transcriptional regulation of gene expression. As such, they are believed to play a role in regulating the step-wise changes in gene expression patterns that occur during cell fate specification of multipotent stem cells. Here, we have studied whether terminal differentiation of C2C12 myoblasts is indeed controlled by lineage-specific changes in miRNA expression. Results: Using a previously generated RNA polymerase II (Pol-II) ChIP-on-chip dataset, we show differential Pol-II occupancy at the promoter regions of six miRNAs during C2C12 myogenic versus BMP2-induced osteogenic differentiation. Overexpression of one of these miRNAs, miR-378, enhances Alp activity, calcium deposition and mRNA expression of osteogenic marker genes in the presence of BMP2. Conclusions: Our results demonstrate a previously unknown role for miR-378 in promoting BMP2-induced osteogenic differentiation. Stable C2C12 cell lines C2C12-pMirn0 and C2C12-pMirn378 were generated by lentiviral transduction of C2C12 myoblasts with a Mirn378-overexpression construct and its parent vector, respectively. C2C12-pMirn0 and C2C12-pMirn378 cells were plated at 2.5 x 10^4 cells/cm2 (day -1), cultured for 1 day in DMEM 10%NCS, then (d0) treated with or without 300 ng/ml bone morphogenetic protein 2 (BMP2) for 6 days. RNA was extracted on d0, d3 and d6 and hybridized to GeneChip Mouse Genome 430 2.0 array (Affymetrix).

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Bmp2 -driven terminal differentiation of the stomach epithelium is induced by an autocrine Bmp2 positive feedback loop and inhibited by H. pylori via Interferon gamma signaling [microarray]

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