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Published on: May 10, 2020
Heterogeneity of left ventricular cardiomyocytes from rat heart
E V Baidyuk1, E A Bitkova, N N Bezborodkina
1Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia. katya_bay@mail.ru
Insights
Cardiomyocyte dry weight varies across the rat left ventricle, with the medial anterior wall being heaviest. However, cardiomyocyte ploidy remains consistent throughout the ventricle regions studied.
Area of Science:
- Cardiology
- Cell Biology
- Physiology
Background:
- Contractile cardiomyocytes exhibit variations in size, shape, and ploidy across different heart regions.
- The heterogeneity of cardiomyocyte populations within individual heart chambers remains largely unexplored.
Purpose of the Study:
- To investigate regional differences in cardiomyocyte dry weight and ploidy within the rat left ventricle.
- To determine if cardiomyocyte populations are heterogeneous within a specific heart chamber.
Main Methods:
- Estimation of cardiomyocyte dry weight in different sections of the rat left ventricle.
- Assessment of cardiomyocyte ploidy across various regions of the left ventricle.
Main Results:
- Cardiomyocytes in the medial part of the left ventricular anterior wall exhibited significantly higher dry weight compared to other regions.
- No significant differences in cardiomyocyte ploidy were observed among the different regions of the left ventricle.
Conclusions:
- The rat left ventricle contains a heterogeneous population of cardiomyocytes based on dry weight.
- Cardiomyocyte ploidy is uniform across different regions of the rat left ventricle, suggesting ploidy is not a major driver of regional functional differences.
Abstract:
Contractile cardiomyocytes in various parts of the heart differ in shape, size, ploidy, and other parameters. However, it is not known whether their population is heterogeneous within each heart chamber. In this paper, dry weight and ploidy of cardiomyocytes were estimated in different parts of rat left ventricle. It was found that the dry weight of cardiomyocytes in medial part of left ventricular anterior wall is higher than in other parts of the ventricle. Cardiomyocyte ploidy is the same in different regions of the left ventricle.
