ISSN:
1432-0878
Keywords:
Semilunar valves
;
Extracellular matrix
;
Tenascin
;
Type-I collagen
;
Heart morphogenesis
;
Domestic fowl
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The development of the semilunar valves takes place in association with septation of the outflow tract in the embryonic heart. Although numerous studies have focused on this process, the causal mechanisms of valvular development remain obscure. This paper reports an immunohistochemical analysis of tenascin and type-I collagen distribution in developing chick heart valves. Tenascin is a glycoprotein that is present on some embryonic extracellular matrices. It plays several significant roles in tissue differentiation, cell growth, and tissue interactions; it is also important for the formation of specific zones of connective tissue that fulfill mechanical functions. Our results show that tenascin is present during valvular morphogenesis and histogenesis, and that its distribution is associated with zones specialized in bearing mechanical loads.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00318452
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