Differential regulation of apoptosis in normal versus transformed mammary epithelium by lutein and retinoic acid

Auteur(s) :
Zhang R., Lee DS., Sumantran VN., Wicha MS.
Date :
Mar, 2000
Source(s) :
CANCER EPIDEMIOLOGY, BIOMARKERS AND PREVENTION. #9:3 p257-263
Adresse :
"WICHA MS,UNIV MICHIGAN,CANC & GERIATR CTR DEPT INTERNAL MED;ROOM 6302;ANN ARBOR,MI 48109 USA.mwicha@umich.edu"

Sommaire de l'article

We examined the effects of all-trans retinoic acid (ATRA) and lutein (a nonprovitamin A carotenoid), on apoptosis and chemosensitivity in primary normal human mammary epithelial cells, SV40 transformed mammary cells, and MCF-7 human mammary carcinoma cells, ATRA and lutein selectively induced apoptosis in transformed but not normal human mammary cells. In addition, both compounds protected normal cells, but not transformed cells, from apoptosis induced by the chemotherapy agents etoposide and cisplatin, Furthermore, lutein and ATRA selectively increased the ratio of Bd-xL:Bax protein expression in normal cells but not transformed mammary cells, suggesting a possible mechanism for selective modulation of apoptosis. The differential effects of lutein and ATRA on apoptotic pathways in normal versus transformed mammary epithelial cells may have important implications for chemoprevention and therapy.

Source : Pubmed
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