Effects of bioglycans isolated from birch fungiinonotus obliquus on electric activity of venous sinus cells in frog heart |
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Authors: | V A Golovko |
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Institution: | (1) Laboratory of Physiological Researches, Department of Biotechnology and Molecular Immunology, Institute of Physiology, Komi Research Center, Ural Division of the Russian Academy of Sciences, Syktyvkar |
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Abstract: | Bioglycans isolated from chaga in a concentration of 0.0001% reduced frequency of action potential in venous sinus cells of
frog heart during the first 15–30 min of exposure, then this parameter increased by 10% per hour over 3.5 h, and was 41±3
min−1 from the 4th to the 20th hour of incubation. The frequency of action potentials in heart strips in the chaga extract was
40% higher than in Ringer's solution. The effect of chaga bioglycan is probably associated with adsorption on myocyte membranes.
Binding of Ca2+ to bioglycans observed during the first 30 min inhibited efflux of intracellular Ca2+.
Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 128, No. 9, pp. 264–266, September, 1999 |
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Keywords: | chag bioglycans action potential pacemaker |
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