Retinoic acid down-regulates VPAC(1) receptors and TGF-beta 3 but up-regulates TGF-beta 2 in lung cancer cells.


The effects of retinoic acid (RA) on lung cancer cells were investigated. Both all-trans (t-RA) and 13-cis RA (c-RA) decreased specific (125)I-VIP binding to NCI-H1299 cells in a time- and concentration-dependent manner. After 20 hr, 30 microM t-RA decreased specific (125)I-VIP binding by 60%. By Scatchard analysis, the density of VIP binding sites but not… (More)


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