ISSN:
1432-0878
Keywords:
Key words: Cardiac fibroblasts
;
Extracellular matrix proteins
;
Angiotensin II
;
Angiotensin receptor
;
Ageing
;
Human
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Abstract. Fibrosis makes an important contribution to the pathophysiological events leading to the development of heart failure in ischemic and hypertensive heart disease. Since cardiac fibroblasts are mainly responsible for the synthesis and deposition of the extracellular matrix, we have established a method for isolating and cultivating human cardiac fibroblasts from explanted human hearts. The cell yield was 2.14±0.25×106 cells in five independent isolations and the cell purity was 95–97%, contaminating cells being vascular smooth muscle cells and pericytes. Cultured cells were studied with respect to growth properties, morphology and deposition of components of the extracellular matrix. Isolated cells displayed a differentiated phenotype, including the second passage in culture; they synthesised collagen I, III, IV, fibronectin, vitronectin, tenascin and chondroitin sulphate and expressed an atypical angiotensin receptor. This atypical angiotensin receptor internalised angiotensins II and III but not angiotensin IV in a time-dependent manner. Stimulation of the cells with angiotensins II and III but not with angiotensin IV resulted in a dose-dependent stimulation of DNA synthesis. Co-incubation with the subtype-specific receptor antagonists Losartan and PD 123317 did not prevent the stimulation of DNA synthesis. The further characterisation of this receptor should provide insights into the pathobiochemical events leading to heart failure in hypertension and ischemic heart disease.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004410050683
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