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Duramycin increases short-circuit current ( I sc ) and net Cl − secretion in tracheal epithelium. We measured the intracellular free calcium ((Ca 2+ )) response to duramycin using Indo-1 and bovine and canine tracheal cell suspensions, and the effect of an intracellular calcium chelator, BAPTA,...
The present study examines the hormonal regulation of the syntheses of gap junction proteins and estrogen receptor activation factors in the rat uterus. Ovariectomy and the depletion of estradiol from the system exerted negative influence on the synthesis of both the proteins. At the same time...
Human placenta was used to investigate the effects of chronic methadone use during pregnancy on villus tissue opioid receptors. Patients included in this investigation received 35–60 mg methadone per day. Methadone-exposed placenta villus tissue had no detectable opioid receptor binding sites...
In this study the volume-dependent, ouabain-resistant K + influx and efflux in camel red blood cells were measured with the tracer Rb + . The results showed that the camel erythrocytes do not have the Na + -K + cotransport. The cell swelling increases a ouabain-resistant K + influx and shrinkage...
The addition of fMet-Leu-Phe or phorbol 12-myristate 13-acetate to human neutrophils stimulates phospholipase D activity as evidenced by the release of phosphatidic acid and the generation of diacylglycerol, and in the presence of ethanol the formation of phosphatidyl ethanol. The activation of...
Diabetic patients present alterations in the activity of a number of enzymes of the plasma membrane. The aim of this study was to verify if the modifications of the enzymatic activities in diabetes mellitus are associated with structural alterations of the cellular membrane. By means of the...
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