Document Detail


Microfilament and microtubule assembly is required for the propagation of inositol trisphosphate receptor-induced Ca2+ waves in bovine aortic endothelial cells.
MedLine Citation:
PMID:  19097121     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Ca2+ is a highly versatile second messenger that plays a key role in the regulation of numerous cell processes. One-way cells ensure the specificity and reliability of Ca2+ signals is by organizing them spatially in the form of waves that propagate throughout the cell or within a specific subcellular region. In non-excitable cells, the inositol 1,4,5-trisphosphate receptor (IP3R) is responsible for the release of Ca2+ from the endoplasmic reticulum. The spatial aspect of the Ca2+ signal depends on the organization of various elements of the Ca2+ signaling toolkit and varies from tissue to tissue. Ca2+ is implicated in many of endothelium functions that thus depend on the versatility of Ca2+ signaling. In the present study, we showed that the disruption of caveolae microdomains in bovine aortic endothelial cells (BAEC) with methyl-beta-cyclodextrin was not sufficient to disorganize the propagation of Ca2+ waves when the cells were stimulated with ATP or bradykinin. However, disorganizing microfilaments with latrunculin B and microtubules with colchicine both prevented the formation of Ca2+ waves. These results suggest that the organization of the Ca2+ waves mediated by IP3R channels does not depend on the integrity of caveolae in BAEC, but that microtubule and microfilament cytoskeleton assembly is crucial.
Authors:
Eric Béliveau; Gaétan Guillemette
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cellular biochemistry     Volume:  106     ISSN:  1097-4644     ISO Abbreviation:  J. Cell. Biochem.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-01-27     Completed Date:  2009-03-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8205768     Medline TA:  J Cell Biochem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  344-52     Citation Subset:  IM    
Affiliation:
Faculty of Medicine and Health Sciences, Department of Pharmacology, Université de Sherbrooke, Sherbrooke, Quebec J1H5N4, Canada.
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MeSH Terms
Descriptor/Qualifier:
Adenosine Triphosphate / pharmacology
Animals
Aorta / cytology*
Bradykinin / pharmacology
Calcium / metabolism*
Cattle
Caveolae / metabolism
Cells, Cultured
Endothelial Cells / drug effects,  metabolism*
Inositol 1,4,5-Trisphosphate Receptors / metabolism*
Microfilaments / metabolism*
Microtubules / metabolism*
Chemical
Reg. No./Substance:
0/Inositol 1,4,5-Trisphosphate Receptors; 56-65-5/Adenosine Triphosphate; 58-82-2/Bradykinin; 7440-70-2/Calcium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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