The Diffusion Capacity of the Hematoparenchymal Barrier in Mammalian and Marine Fish Skeletal Muscles
- Authors: Soldatov A.A.1
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Affiliations:
- A.O. Kovalevsky Institute of Marine Biological Studies
- Issue: Vol 54, No 1 (2018)
- Pages: 43-49
- Section: Comparative and Ontogenic Biochemistry
- URL: https://journals.rcsi.science/0022-0930/article/view/159422
- DOI: https://doi.org/10.1134/S0022093018010052
- ID: 159422
Cite item
Abstract
Analysis of own and literature data shows that oxygen tension and mass transfer in skeletal muscles of higher and lower vertebrates (mammals, teleosts) are quite comparable. Oxygen consumption in fish muscles is 2–6 times lower and occurs at higher diffusion gradients of PO2 (blood ↔ muscles: 45–57 hPa). Wei ghted mean values of PO2 in fish muscles (with allowance for muscle composition) are minimum (5–12 hPa). As compared to mammals, they exhibit an extremely low diffusion capacity of the hematoparenchymal barrier (0.0014–0.0055 mLO2 min–1 100 g–1 hPa–1) which appears to rely on diffusion characteristics of cell membranes. Apparently, this is the main reason that accounts for low values of tissue PO2 as well as low efficacy and oxygen utilization degree in muscles of this taxonomic group of animals.
About the authors
A. A. Soldatov
A.O. Kovalevsky Institute of Marine Biological Studies
Author for correspondence.
Email: alekssoldatov@yandex.ru
Russian Federation, Sevastopol