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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 Katoh,  
 

Expression and regulation of WNT1 in human cancer: up-regulation of WNT1 by beta-estradiol in MCF-7 cells.

WNT family of secreted-type glycoproteins play key roles in carcinogenesis and embryogenesis. We have cloned and characterized human WNT2B/WNT13, WNT3, WNT3A, WNT5B, WNT6, WNT7B, WNT8A, WNT8B, WNT10A, WNT10B, WNT11, WNT14 and WNT14B/ WNT15 using bioinformatics and cDNA-PCR, and also reported frequent up-regulation of WNT2 in primary gastric cancer. Here, expression and regulation of WNT1 in human cancer were investigated using cDNA-PCR. WNT1 mRNA was relatively highly expressed in OKAJIMA cells (gastric cancer) and BxPC-3 cells (pancreatic cancer). Expression of WNT1 mRNA was up-regulated in 5 out of 10 cases of primary gastric cancer. Effects of beta-estradiol on expression of human WNT1 in MCF-7 cells (breast cancer) was next investigated, because mouse Wnt-1 induces mammary carcinogenesis even in estrogen receptor alpha (ERalpha) knockout mice. Expression of WNT1 mRNA was significantly up-regulated by beta-estradiol in MCF-7 cells. WNT1 was found to be one of estrogen target genes in human MCF-7 cells, which in part explains Wnt1- induced mammary carcinogenesis in ERalpha knockout mice.[1]

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