Effects of saponins of Panax notoginseng on sodium-potassium-adenosine triphosphatase and calcium-magnesium-adenosine triphosphatase.
Rat brain synaptosomal Na(+)-K(+)-ATPase was activated by Panax notoginseng (PNS, 0.1-1.0 mg.ml-1), fraction Rb1 (25-200 micrograms.ml-1), and fraction Rg1 (50-200 micrograms.ml-1). Activating rates were respectively 84-227%, 12-48%, and 12-22%. Results implied that Rb1 and Rg1 were not the major components of PNS, which were responsible for the activating effects. Ca(2+)-Mg(2+)-ATPase was inhibited by PNS (0.1-1.0 mg.ml-1) and Rb1 (100-200 micrograms.ml-1), but not by Rg1. It was proposed that PNS activated Na(+)-K(+)-ATPase, leading to a reduced Na+/Ca2+ exchange, a lowered intracellular Ca2+ level, and heart contractility.
Jin
L Q
LQ
Department of Pharmacology, Suzhou Medical College, China.
Shi
L
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D000818:Animals; D017301:Ca(2+) Mg(2+)-ATPase / Q000378:metabolism*; D000252:Calcium-Transporting ATPases / Q000378:metabolism*; D005260:Female; D036145:Ginsenosides; D008297:Male; D005894:Panax; D010946:Plants, Medicinal; D051381:Rats; D011919:Rats, Inbred Strains; D012503:Saponins / Q000494:pharmacology*; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism*; D013574:Synaptosomes / Q000201:enzymology*
D036145:Ginsenosides; D012503:Saponins; D017301:Ca(2+) Mg(2+)-ATPase; D000252:Calcium-Transporting ATPases; D000254:Sodium-Potassium-Exchanging ATPase; C035054:ginsenoside Rg1