Related Experiment Video
Updated: Jul 6, 2026
Induction and Micro-CT Imaging of Cerebral Cavernous Malformations in Mouse Model
Published on: September 4, 2017
Mice with cav-1 gene disruption have benign stromal lesions and compromised epithelial differentiation
Guang Yang1, Terry L Timme, Koji Naruishi
1Scott Department of Urology, Baylor College of Medicine, Houston, TX, USA.
Abstract:
Caveolin-1 (cav-1) is a major structural protein of caveolae, small invaginations of the plasma membrane that integrate and regulate signaling pathways involved in cell growth and differentiation. We previously generated a genetically engineered mice that are homozygous for a null mutation in exon 2 of cav-1 and documented increased incidence of urolithiasis in young male cav-1(-/-) mice. We attributed this, in part, to improper localization of plasma membrane calcium/calmodulin-dependent calcium ATPase in the distal convoluted tubules of the kidney. To document pathologies related to cav-1 function, we maintained cav-1(-/-) and control cav-1(+/+) mice for an extended time period. We report here that cav-1(-/-) mice demonstrate organ-specific growth-related disorders in stromal cells that normally have high levels of cav-1 expression. In many of these organs, epithelial cell growth/differentiation abnormalities were also observed, yet in most of these sites the epithelial cells normally express low to non-detectable levels of cav-1. We propose that loss of cav-1 function in stromal cells of various organs directly leads to a disorganized stromal compartment that, in turn, indirectly promotes abnormal growth and differentiation of adjacent epithelium.
Insights
Loss of caveolin-1 (cav-1) in mice causes organ growth disorders in stromal cells, indirectly affecting adjacent epithelial cells. This highlights cav-1
Area of Science:
- Cell Biology
- Molecular Biology
- Physiology
Background:
- Caveolin-1 (cav-1) is a key structural protein of caveolae, regulating cellular signaling pathways.
- Previous studies noted urolithiasis in young male cav-1 knockout mice, linked to calcium ATPase mislocalization.
Purpose of the Study:
- To investigate long-term pathologies associated with caveolin-1 deficiency.
- To elucidate the role of cav-1 in organ-specific growth and differentiation.
Main Methods:
- Generation and extended observation of genetically engineered mice homozygous for a null mutation in cav-1 (cav-1(-/-)).
- Comparison of cav-1(-/-) mice with control cav-1(+/+) mice.
- Histological and cellular analysis of organ tissues.
Main Results:
- Cav-1 knockout mice exhibit organ-specific growth disorders in stromal cells.
- Abnormalities in epithelial cell growth and differentiation were observed in organs with low/absent cav-1 expression.
- Loss of cav-1 in stromal cells leads to a disorganized stromal compartment, indirectly affecting adjacent epithelium.
Conclusions:
- Caveolin-1 plays a critical role in maintaining stromal cell integrity and function.
- Disruption of stromal compartment by cav-1 loss indirectly impacts epithelial homeostasis.
- Cav-1 deficiency has broader implications for organ development and pathology beyond initial observations.
