Journal
JOURNAL OF STRUCTURAL BIOLOGY
Volume 173, Issue 1, Pages 110-116Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jsb.2010.06.020
Keywords
Connective tissue; Collagen; Picrosirius red; Scanning electron microscopy; Confocal microscopy
Funding
- Royal Society of New Zealand [06-UOA-123]
- Health Research Council of New Zealand [06/067]
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Cardiac ventricular trabeculae are widely used in the study of cardiac muscle function, primarily because their myocytes are axially-aligned. However, their collagen content has not been rigorously determined. In particular, it is unknown whether the content of collagen differs between specimens originating from the left (LV) and right (RV) ventricles and whether, indeed, either corresponds to the collagen content of the ventricular walls themselves. In order to redress this deficit of knowledge, we have used the techniques of fluorescence confocal microscopy and environmental scanning electron microscopy to quantify the proportion of perimysial collagen comprising the cross-sectional area of trabeculae carneae. In trabeculae from both the RV and LV of adult rat hearts, collagen may occupy as little as 1% or as much as 100% of the cross-section. For specimens of dimensions typically used experimentally, there was no difference in average collagen content (6.03 +/- 5.14%, n = 33) of preparations from the two ventricles. (C) 2010 Elsevier Inc. All rights reserved.
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