PMID- 20399205 OWN - NLM STAT- MEDLINE DCOM- 20100803 LR - 20211020 IS - 1096-0945 (Electronic) IS - 0014-4800 (Print) IS - 0014-4800 (Linking) VI - 89 IP - 1 DP - 2010 Aug TI - MMTV promoter-regulated caveolin-1 overexpression yields defective parenchymal epithelia in multiple exocrine organs of transgenic mice. PG - 9-19 LID - 10.1016/j.yexmp.2010.03.009 [doi] AB - Caveolin-1 (Cav-1) is a major structural protein of caveolae, specialized plasma membrane invaginations that are involved in a cell-specific fashion in diverse cell activities such as molecular transport, cell adhesion, and signal transduction. In normal adult mammals, Cav-1 expression is abundant in mesenchyme-derived cells but relatively low in epithelial parenchyma. However, epithelial Cav-1 overexpression is associated with development and/or progression of many carcinomas. In this study, we generated and characterized a transgenic mouse model of Cav-1 overexpression under the control of a mouse mammary tumor virus (MMTV) long terminal-repeat promoter, which is predominantly expressed in specific epithelial cells. The MMTVcav-1(+) transgenic mice were fertile, and females bore litters of normal size with no obvious developmental abnormalities. However, by age 11months, the MMTVcav-1(+) mice demonstrated overtly different phenotypes in multiple exocrine organs when compared with their nontransgenic MMTVcav-1(-) littermates. Cav-1 overexpression in MMTVcav-1(+) mice produced organ-specific abnormalities, including hypotrophy of mammary glandular epithelia, bronchiolar epithelial hyperplasia and atypia, mucous-cell hyperplasia in salivary glands, elongated hair follicles and dermal thickening in the skin, and reduced accumulation of enzymogen granules in pancreatic acinar cells. In addition, the MMTVcav-1(+) transgenic mice tended to have a greater incidence of malignant tumors, including lung and liver carcinomas and lymphoma, than their MMTVcav-1(-) littermates. Our results indicate that Cav-1 overexpression causes organ-specific, age-related epithelial disorders and suggest the potential for increased susceptibility to carcinogenesis. CI - Copyright 2010 Elsevier Inc. All rights reserved. FAU - Yang, Guang AU - Yang G AD - Department of Genitourinary Medical Oncology-Research, Unit 18-3, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030-4009, USA. guangyang@mdanderson.org FAU - Park, Sanghee AU - Park S FAU - Cao, Guangwen AU - Cao G FAU - Goltsov, Alexei AU - Goltsov A FAU - Ren, Chengzhen AU - Ren C FAU - Truong, Luan D AU - Truong LD FAU - Demayo, Francesco AU - Demayo F FAU - Thompson, Timothy C AU - Thompson TC LA - eng GR - P30 CA016672/CA/NCI NIH HHS/United States GR - CA 16672/CA/NCI NIH HHS/United States GR - CA R0168814/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20100422 PL - Netherlands TA - Exp Mol Pathol JT - Experimental and molecular pathology JID - 0370711 RN - 0 (Caveolin 1) SB - IM MH - Abnormalities, Multiple/*genetics MH - Animals MH - Caveolin 1/*genetics MH - Cells, Cultured MH - Epithelium/metabolism/*pathology MH - Exocrine Glands/*abnormalities MH - Female MH - Gene Expression Regulation/*physiology MH - Hyperplasia MH - Incidence MH - Liver Neoplasms/genetics MH - Lung Neoplasms/genetics MH - Male MH - Mammary Glands, Animal/abnormalities MH - Mammary Tumor Virus, Mouse/*genetics MH - Mice MH - Mice, Transgenic MH - Promoter Regions, Genetic/*genetics MH - Skin/metabolism/pathology PMC - PMC3881545 MID - NIHMS198149 COIS- Conflict of interest statement The authors declare that there are no conflicts of interest. EDAT- 2010/04/20 06:00 MHDA- 2010/08/04 06:00 PMCR- 2014/01/06 CRDT- 2010/04/20 06:00 PHST- 2010/03/12 00:00 [received] PHST- 2010/03/31 00:00 [accepted] PHST- 2010/04/20 06:00 [entrez] PHST- 2010/04/20 06:00 [pubmed] PHST- 2010/08/04 06:00 [medline] PHST- 2014/01/06 00:00 [pmc-release] AID - S0014-4800(10)00052-3 [pii] AID - 10.1016/j.yexmp.2010.03.009 [doi] PST - ppublish SO - Exp Mol Pathol. 2010 Aug;89(1):9-19. doi: 10.1016/j.yexmp.2010.03.009. Epub 2010 Apr 22.