Vasoactive intestinal peptide induces surfactant protein A expression in ATII cells through activation of PKC/c-Fos pathway.

Abstract

Vasoactive intestinal peptide (VIP) is a major neurotransmitter in the lungs and regulates many aspects of pulmonary functions. Pulmonary surfactant (PS), a complex mixture of lipids and proteins, produced by the alveolar type II (ATII) cells maintains alveolar integrity and plays important roles in the control of host defense and inflammation in the lungs. Surfactants deficiency or dysfunction is associated with occurrence and development of many pulmonary diseases. We reported previously that VIP enhanced the synthesis of pulmonary surfactants phospholipid in ATII cells. In this study, the effect of VIP on the expression of pulmonary surfactant protein A (SP-A) in lung explants was investigated. Firstly, we found that VIP elevated SP-A expression in ATII cells which was mediated by enhanced sp-a gene transcription. Furthermore, we identified that c-Fos protein was essential for VIP induced SP-A expression in ATII cells. Finally, we provided evidence to show that activation of c-Fos expression by PKC was required for VIP induced SP-A expression. Altogether, our work showed that VIP regulated the function of pulmonary surfactant system in the lungs and further investigation of the underlying mechanism would provide important clues for better therapeutic strategy design for pulmonary disorders caused by surfactant deficiency.

• Authors: Lian Li, Hua She, Shaojie Yue, Dandan Feng, Ziqiang Luo
• Journal: Peptides (Peptides) Vol. 31 Issue 11 Pg. 2046-51 (Nov 2010) ISSN: 1873-5169 [Electronic] United States
• PMID: 20688121 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2010 Elsevier Inc. All rights reserved.

Chemical References

• Proto-Oncogene Proteins c-fos
• Pulmonary Surfactant-Associated Protein A
• Vasoactive Intestinal Peptide
• Protein Kinase C

Topics

• Animals
• Cells, Cultured
• Protein Kinase C (physiology)
• Proto-Oncogene Proteins c-fos (physiology)
• Pulmonary Alveoli (cytology, metabolism)
• Pulmonary Surfactant-Associated Protein A (biosynthesis)
• Rats
• Vasoactive Intestinal Peptide (pharmacology, physiology)