Elastica-Positive Material in the Atrial Endocardium
作者:
Wolfgang Klein,
Peter Böck,
期刊:
Cells Tissues Organs
(Karger Available online 1983)
卷期:
Volume 116,
issue 2
页码: 106-113
ISSN:1422-6405
年代: 1983
DOI:10.1159/000145732
出版商: S. Karger AG
关键词: Ultrastructure;Elastin;Microfibrils;Endocardium;Atrium
数据来源: Karger
摘要:
The elastic layer of the endocardium is studied in various laboratory animals (mouse, rat, rabbit, cat, and dog) and in man. Coarse elastica-positive fibers form a tightly woven layer in the endocardium of the left atrium; the elastic layer consists of loosely arranged delicate fibers in the endocardium of the right atrium. Electron microscopy shows the elastic material to consist of homogeneous elastin (E) and of elastic fiber microfibrils (EFM). Elastic material in the endocardium of the left atrium is mainly formed of E with few EFM present. By contrast, the portion of EFM predominates that of E in elastic fibers from the right atrium, where some elastica-positive fibers even appear as pure bundles of microfibrils. This was also observed in human material obtained from aged individuals (8th decennium). It is concluded that EFM are not only progenitors of E but represent an independent fibrous component of the connective tissue.
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