Production of gastrin-releasing peptide by a non-small cell lung carcinoma cell line adapted to serum-free and growth factor-free conditions

Jill M. Siegfried, Yi Hong Han, Mary Ann A DeMichele, Jay D. Hunt, Autumn L. Gaither, Frank Cuttitta

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Gastrin-releasing peptide is an important growth-modulating factor in developing lung epithelium. It is known to be produced by small cell carcinomas of the lung, and an autocrine loop involving gastrin-releasing peptide and its receptor has been demonstrated in many small cell lung tumors. We investigated whether such an autocrine loop could also be demonstrated in non-small cell lung carcinoma, since gastrin-releasing peptide is known to stimulate human bronchial epithelial cells, from which non-small cell tumors should emerge. We report here that gastrin-releasing peptide is produced by a bronchiolo-alveolar carcinoma cell line (A549) adapted to serum-free and growth factor-free conditions. A549 cells adapted to these conditions, termed A549-R0 cells, display extensive membrane interdigitations, Golgi apparatus, and secretory-like granules, and grow as a mixture of attached colonies and floating cells. Gastrin-releasing peptide is present in the conditioned medium produced by A549-R0 cells. Colony formation of cells derived from a squamous cell carcinoma of the lung, 239T, was stimulated 9-fold by A549-R0 conditioned medium or by authentic gastrin- releasing peptide, measured in serum-free conditions. The growth stimulatory activity was inhibited by a monoclonal antibody to gastrin-releasing peptide. Transcripts for receptors for the bombesin family of peptides were also demonstrated in A549-R0 cells and 239T cells. These results demonstrate that non-small cell lung carcinomas can secrete gastrin-releasing peptide and can also respond to the peptide.

Original languageEnglish (US)
Pages (from-to)8596-8603
Number of pages8
JournalJournal of Biological Chemistry
Volume269
Issue number11
StatePublished - Mar 18 1994

Fingerprint Dive into the research topics of 'Production of gastrin-releasing peptide by a non-small cell lung carcinoma cell line adapted to serum-free and growth factor-free conditions'. Together they form a unique fingerprint.

Cite this