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Five cardiac hormones decrease the number of human small-cell lung cancer cells.

Abstract：

BACKGROUND:Four peptide hormones of a family of six hormones, i.e. atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), C-natriuretic peptide (CNP), long acting natriuretic peptide (LANP), vessel dilator and kaliuretic peptide, significantly decrease the number of adenocarcinoma cells in culture. The present investigation was designed to determine whether these peptide hormones' effects are specific to adenocarcinomas or whether they might decrease the number of cancer cells of a different type of cancer, i.e. small-cell lung cancer. METHODS AND MATERIALS:These six hormones were evaluated for their ability to decrease the number and/or proliferation of human small-cell lung cancer cells in culture for 24, 48, 72, and 96 h. RESULTS:Within 24 h, vessel dilator, LANP, kaliuretic peptide, ANP and their intracellular mediator cyclic GMP, each at 1 microM, decreased the number of small-cell lung cancer cells by 63% (P < 0.001), 21% (P < 0.05), 30% (P < 0.05), 39% (P < 0.05), and 31% (P < 0.05), respectively. There was no proliferation in the 3 days following this decrease in cell number. These same hormones decreased DNA synthesis 68% to 82% (P < 0.001). Brain natriuretic peptide and CNP did not decrease the number of small-cell lung cancer cells or inhibit their DNA synthesis at 1 microM or 10 microM concentrations. Dose-response curves revealed that at 100 microM, the vessel dilator decreased 92% of the cancer cells in 24 h while BNP had no effect, but CNP caused a 39% decrease. Western blots revealed that the natriuretic peptide receptors A- and C- were present in these cancer cells. CONCLUSIONS:Five peptide hormones significantly decrease the number of human small-cell lung cancer cells within 24 h and inhibit their proliferation for at least 96 h. Their mechanism of doing so involves inhibition of DNA synthesis mediated in part by cyclic GMP.

journal_name

Eur J Clin Invest

journal_title

European journal of clinical investigation

authors

Vesely BA,Song S,Sanchez-Ramos J,Fitz SR,Alli AA,Solivan SM,Gower WR Jr,Vesely DL

doi

10.1111/j.1365-2362.2005.01501.x

keywords:

subject

Has Abstract

pub_date

2005-06-01 00:00:00

pages

388-98

issue

eissn

0014-2972

issn

1365-2362

pii

ECI1501

journal_volume

pub_type

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Five cardiac hormones decrease the number of human small-cell lung cancer cells.