Cited by 212Trace Elements in HealthHeavy Metal Exposure and ToxicityIron Metabolism and Disorders

Role of Zinc in Plasma Membrane Function

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O'Dell, Boyd L.·2000·The Journal of Nutrition

Abstract

The concentration of plasma zinc is the generally accepted index of zinc status. Although low plasma zinc is an essential criterion of deficiency, alone it is inadequate. To supplement this index, we sought to determine the first limiting biochemical defect in animals fed zinc-deficient diets and concluded that the limiting function is associated with a posttranslational change in plasma membrane proteins. Among the signs of zinc deficiency in rats is a bleeding tendency associated with failure of platelet aggregation, a phenomenon that correlates with impaired uptake of Ca(2+) when stimulated. Zinc-deficient guinea pigs exhibit signs of peripheral neuropathy, and their brain synaptic vesicles exhibit impaired Ca(2+) uptake when they are stimulated with glutamate. Red cells from zinc-deficient rats show increased osmotic fragility associated with decreased plasma membrane sulfhydryl concentration. Both phenomena are readily reversed (2 d) by dietary zinc repletion. Volume recovery is dependent on Ca-dependent K channels and the sulfhydryl redox state. Both the impaired aggregation and calcium uptake of zinc-deficient platelets are corrected by in vitro incubation of blood with glutathione. Considering the fact that plasma membranes from several cell types show impaired function that is associated with a decreased rate of calcium uptake, it is postulated that a defect in calcium channels is the first limiting biochemical defect in zinc deficiency. The calcium uptake defect and consequent impaired second-messenger function likely results from an abnormal sulfhydryl redox state in the membrane channel protein.

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Crossref · 10.1093/jn/130.5.1432s

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Authors
O'Dell, B. L.
Venue
The Journal of Nutrition
Publisher
Elsevier BV
Published
2000-05
Volume
130
Issue
5
Pages
1432S-1436S
ISSN
0022-3166 (ISSN-L)
OpenAlex
W2163018505
Cited by
212
References
30
Citations by year
2026: 4 · 2025: 6 · 2024: 7 · 2023: 7 · 2022: 12 · 2021: 15 · 2020: 16 · 2019: 14 · 2018: 4 · 2017: 7 · 2016: 7 · 2015: 5 · 2014: 11 · 2013: 9 · 2012: 8
FWCI
1.06
Type
journal article
Language
en
Open access
Locations
  • Journal of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Heavy Metal Exposure and Toxicity
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
Keywords
zinc deficiency, plasma zinc, plasma membrane, calcium uptake, calcium channels, platelet aggregation, peripheral neuropathy, synaptic vesicles, glutamate, osmotic fragility, glutathione, second messengers, zinc status
MeSH terms
Animals, Cell Membrane, Deficiency Diseases, Diet, Membrane Proteins, Nutritional Status, Osmotic Fragility, Oxidation-Reduction, Sulfhydryl Compounds, Zinc, Calcium Channels

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