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  • Title: [Growth inhibitory effect of retinoic acid in human breast cancer cells correlates with retinoic acid receptor alpha (RAR alpha) expression].
    Author: Yu L, Shao Z, Cai S.
    Journal: Zhonghua Zhong Liu Za Zhi; 1996 Nov; 18(6):429-32. PubMed ID: 9387294.
    Abstract:
    The relationship between the effect of retinoic acid (RA) on the growth of breast cancer cell and their estrogen receptor (ER) status as well as the relationship between RA effect and the expression of retinoic acid receptorsd (RAR alpha) were studied by cell growth assay, Northern Blot and gene transfection. It was found that RA could only inhibit the growth of ER-positive but not ER-negative breast cancer cells. RAR alpha mRNA level was significantly higher in ER-positive breast cancer cell lines than that in ER-negative breast cancer cell line. The expressions of other subtypes of RAR in ER-positive cells were not significantly different from those in ER-negative ones. When, RAR alpha cDNA was introduced and ixpressed in RA-resistant, ER-negative MDA-MB-231 breast cancer cell line, its growth was strongly inhibited by RA. These results indicate that RAR alpha plays a major role in the retinoi-dmediated inhibition of growth in human breast cancer cells.
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