Cellular ultrastructure and catecholamine histofluorescence of the heart of the Australian lungfish, Neoceratodus forsteri

Chopin L.K. and Bennett M.B. (1995) Cellular ultrastructure and catecholamine histofluorescence of the heart of the Australian lungfish, Neoceratodus forsteri. Journal of Morphology, 223 2: 191-201. doi:10.1002/jmor.1052230207


Author Chopin L.K.
Bennett M.B.
Title Cellular ultrastructure and catecholamine histofluorescence of the heart of the Australian lungfish, Neoceratodus forsteri
Journal name Journal of Morphology   Check publisher's open access policy
ISSN 0362-2525
Publication date 1995-01-01
Year available 1995
Sub-type Article (original research)
DOI 10.1002/jmor.1052230207
Open Access Status Not yet assessed
Volume 223
Issue 2
Start page 191
End page 201
Total pages 11
Place of publication NEW YORK
Publisher WILEY-LISS
Language eng
Subject 1101 Medical Biochemistry and Metabolomics
1309 Developmental Biology
2702 Anatomy
Abstract Ultrastructural descriptions of the dipnoan heart are lacking. Many ultrastructural features of the heart of the Australian lungfish, Neoceratodus forsteri, resemble those of other fewer vertebrates. The epicardial cells appear to be adapated for the exchange of material with the pericardial fluid. The most prominent features of the endocardial cells are numerous moderately electron-dense vesicles found within the cytoplasm. These organelles might have an endocrine function. The myocardiocytes are typically small. The banding pattern of the sarcomere is shared with most fish. The intercalated disc has a convoluted path and consists of desmosomes and fascia adherens. Caveolae are a prominent feature of the sarcoplasm. The sarcoplasmic reticulum is sparse, and T-tubules are lacking. Atrial myocardial dense bodies occur in vast numbers throughout the atrium and are occasionally seen in the ventricle. These vesicles are chromaffin-positive but fail to show catecholamine fluorescence. They are likely to contain peptides related to ANP. Subendothelial cells exhibiting catecholamine-specific fluorescence are scattered throughout the atrium. Ultrastructurally these cells contain many chromaffin-positive granules. Chromaffin cells represent another cell type with a probable endocrine function within the heart of N. forsteri. (C) 1995 Wiley-Liss, Inc.
Keyword Atrial-Natriuretic-Peptide
Immunohistochemical Localization
Protopterus-Aethiopicus
Squalus-Acanthias
African Lungfish
Chromaffin Cells
Myxine-Glutinosa
Fine-Structure
Dogfish
Brain
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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