Lee M, Jensen RT, Huang SC, Bepler G, Korman L, Moody TW. Vasoactive intestinal polypeptide binds with high affinity to non-small cell lung cancer cells and elevates cyclic AMP levels.
Peptides 1990;
11:1205-9. [PMID:
1965032 DOI:
10.1016/0196-9781(90)90153-v]
[Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Vasoactive intestinal polypeptide (VIP) receptors were characterized on non-small cell lung cancer (NSCLC) cells. 125I-VIP bound specifically to membranes derived from 6 NSCLC cell lines. Specific 125I-VIP was time dependent and a linear function of EPLC-65H membrane concentration. 125I-VIP bound with high (Kd = 0.2 nM) and moderate (Kd = 39 nM) affinity to two classes of sites. Pharmacology studies indicated that the order of peptide potency was VIP greater than rGHRH greater than PHI = helodermin greater than secretin greater than glucagon. Also VIP elevated the cAMP levels 10-fold using cell line ADLC-5M2. These data indicate that functional VIP receptors are present on NSCLC cells.
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