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1,25(OH)2D3 upregulated lncRNA

ABSTRACT: Purpose: The goals of this study are to compare lncRNA between Wild Type and VDR KO in HaCat cell line using NET-CAGE.

ORGANISM(S): Homo sapiens

PROVIDER: GSE179017 | GEO | 2021/06/29

REPOSITORIES: GEO

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1,25(OH)2D3 upregulated lncRNA

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Target gene profiles of 1,25(OH)2D3 and 25(OH)D3 in Cyp27b1 knockout mDCT cells.

Project description:Recently, it has been reported that 25(OH)D3 (25D3) has physiological bioactivity in certain tissues derived from the Cyp27b1 knockout mice. To investigate 25D3 function in the kidney as an informational crossroad of various calciotropic substances, we employed CRISPR-Cas9 system to knock out the Cyp27b1 gene in the mouse renal tubular cell line, mDCT cells. Unlike the previously reported mice targeted to the Cyp27b1 gene systemically, Cyp27b1 knockout mDCT cells did not produce any measurable 1a,25(OH)2D3 (1,25D3) after 25D3 administration. As was seen in the treatment with 10-8 M and higher dose of 1,25D3, we found that 10-7 M of 25D3 could translocate VDR into the nucleus and promoted expression of the representative 1,25D3-responsive Cyp24a1 gene in the Cyp27b1 knockout mDCT cells. The exhaustive target gene profiles of 25D3 showed results closely mimicking those of 1,25D3. Subsequently, we confirmed that 25D3 induced the expression of a calcium reabsorption-related gene, Calbindin-D9K gene, in a similar way to 1,25D3. As another example among others, we found that both 1,25D3 and 25D3 induced the expression of Megalin gene. Our ChIP assay identified that two VDRE sites at the upstream region of the Megalin gene contributed to such gene activation. Together, we surmise that the ability to stimulate VDR target genes may provide a novel perspective with 25D3 contribution in certain tissues.

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1,25-Dihydroxyvitamin D3 (1,25(OH)2D3) Signaling Capacity and the Epithelial-Mesenchymal Transition in Non-Small Cell Lung Cancer (NSCLC): Implications for Use of 1,25(OH)2D3 in NSCLC Treatment.

Project description:1,25-dihydroxyvitamin D3 (1,25(OH)2D3) exerts anti-proliferative activity by binding to the vitamin D receptor (VDR) and regulating gene expression. We previously reported that non-small cell lung cancer (NSCLC) cells which harbor epidermal growth factor receptor (EGFR) mutations display elevated VDR expression (VDRhigh) and are vitamin D-sensitive. Conversely, those with K-ras mutations are VDRlow and vitamin D-refractory. Because EGFR mutations are found predominately in NSCLC cells with an epithelial phenotype and K-ras mutations are more common in cells with a mesenchymal phenotype, we investigated the relationship between vitamin D signaling capacity and the epithelial mesenchymal transition (EMT). Using NSCLC cell lines and publically available lung cancer cell line microarray data, we identified a relationship between VDR expression, 1,25(OH)2D3 sensitivity, and EMT phenotype. Further, we discovered that 1,25(OH)2D3 induces E-cadherin and decreases EMT-related molecules SNAIL, ZEB1, and vimentin in NSCLC cells. 1,25(OH)2D3-mediated changes in gene expression are associated with a significant decrease in cell migration and maintenance of epithelial morphology. These data indicate that 1,25(OH)2D3 opposes EMT in NSCLC cells. Because EMT is associated with increased migration, invasion, and chemoresistance, our data imply that 1,25(OH)2D3 may prevent lung cancer progression in a molecularly defined subset of NSCLC patients.

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