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- W64465852 abstract "Although the liver plays an important role in Zn metabolism, the mechanisms regulating hepatic Zn uptake are poorly understood. Hepatocytes were isolated from adult female rats, body weight 200-250 g, by the collagenase perfusion technique and purified by differential centrifugation. Uptake of Zn was studied by incubation of hepatocytes with /sup 65/Zn in 10 mM HEPES buffer, pH 7.4, containing 138 mM NaCl, 5.2 mM KCl, 0.9 mM MgCl/sub 2/ and 1.0 mM CaCl/sub 2/, followed by washing with ice-cold 10 mM EDTA, 0.9% NaCl, pH 7.3 on Whatman GF-C glass microfiber filters. Zn uptake of 37/sup 0/C from ZnSO/sub 4/ (10 ..mu..M) was linear up to approx. 5 min with an initial rate of uptake of 11-20 ng/min/10/sup 6/ viable cells. Initial rate of Zn uptake at 37/sup 0/C was over 10-fold greater than at 4/sup 0/C. At 37/sup 0/C initial rate of uptake increased as a function of Zn concentration in the range 2-20 ..mu..M, with K/sub m/ = 27 ..mu..M and V/sub max/ = 42 ng/min/10/sup 6/ viable cells. Inclusion of bovine serum albumin (2 mg/ml) with ZnSO/sub 4/ (10 ..mu..m) reduced the initial rate of uptake to approx. 25% of the rate with ZnSO/sub 4/ alone.more » The low molecular weight ligands, phosphate, citrate and histidine at equimolar concentrations with Zn had little effect on Zn uptake by hepatocytes.« less" @default.
- W64465852 created "2016-06-24" @default.
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- W64465852 date "1986-03-05" @default.
- W64465852 modified "2023-09-24" @default.
- W64465852 title "Effect of serum albumin and low molecular weight ligands on Zn uptake by isolated rat hepatocytes" @default.
- W64465852 hasPublicationYear "1986" @default.
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