Skip to Main content Skip to Navigation
Journal articles

Caveolin-1 and -3 dissociations from caveolae to cytosol in the heart during aging and after myocardial infarction in rat.

Abstract : OBJECTIVE: Caveolins, the structural proteins of caveolae, modulate numerous signaling pathways including Nitric Oxide (NO) production. Among the caveolin family, caveolin-1 and -3 are mainly expressed in endothelial and muscle cells, respectively. In this study, we investigate whether (i) changes in caveolin abundance and/or distribution occur during cardiac aging and failure in rat, and (ii) the process could influence NO synthase (NOS) activity. METHODS: Using immunohistolabelling and Western blot approaches, expression and distribution of caveolins were analysed in adult (Ad), senescent (S-Sh) and myocardial infarction-induced failing (S-MI) hearts. NOS3/caveolin-1 interactions were evaluated by immunoprecipitation assays. RESULTS: At the microscope level, caveolin-1 distribution in the endothelial cells was unchanged between the groups. Conversely the typical distribution of caveolin-3 in myocyte sarcolemma was dramatically altered in S-MI rats, resulting in a heterogeneous pattern throughout the septum. Total abundance of caveolin-1 and -3 remained stable whatever the group. In the fractions free of caveolae (Triton X-100 soluble), the levels of caveolin-1 alpha and -3 increased with aging (+20%, and +104%, P<0.05 versus Ad, respectively) and were further enhanced in S-MI (+25%, +30%, P<0.05, P<0.001 versus S-Sh respectively). In these fractions, NOS3/caveolin-1 alpha complexes increased as well. In addition, NOS activity was negatively correlated to caveolin-1 level in the cytosolic fractions. CONCLUSIONS: We demonstrate that dissociation of caveolin from caveolae is associated with aging and heart failure, the process being related to the decreased NOS activity.
Document type :
Journal articles
Complete list of metadata

Cited literature [15 references]  Display  Hide  Download
Contributor : Philippe Ratajczak Connect in order to contact the contributor
Submitted on : Thursday, October 11, 2012 - 5:09:17 PM
Last modification on : Saturday, June 25, 2022 - 8:52:40 PM
Long-term archiving on: : Saturday, December 17, 2016 - 12:01:58 AM


 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : jamais

Please log in to resquest access to the document


  • HAL Id : inserm-00741115, version 1
  • PUBMED : 12566108



Philippe Ratajczak, Thibaud Damy, Christophe Heymes, Patricia Oliviéro, Françoise Marotte, et al.. Caveolin-1 and -3 dissociations from caveolae to cytosol in the heart during aging and after myocardial infarction in rat.. Cardiovascular Research, Oxford University Press (OUP), 2003, 57 (2), pp.358-69. ⟨inserm-00741115⟩



Record views