Age-related impairment in rat parotid cell α 1 -adrenergic action at the level of inositol trisphosphate responsiveness
Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, ISSN: 0167-4889, Vol: 968, Issue: 2, Page: 203-210
1988
- 42Citations
- 1Captures
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Metrics Details
- Citations42
- Citation Indexes42
- 42
- CrossRef35
- Captures1
- Readers1
Article Description
α 1 -Adrenergic-stimulated calcium efflux from rat parotid cell aggregates declines approx. 40% between 3 and 24 months of age, with the bulk of the reduction occurring between 12 and 24 months. Intracellular free calcium levels following α 1 -adrenoceptor stimulation are also reduced about 40% between 3 and 24 months. No significant age differences in stimulation of inositol mono-, bis- or trisphosphate production are observed. However, the ability of inositol trisphosphate to directly stimulate calcium efflux is reduced by about 50% with increasing age. Concentrations of this inositol phosphate required for maximal calcium release do not change between 3 and 24 months. Differences in response are not due to a reduction in uptake of inositol trisphosphate into older cells, but suggest an age-related defect in the ability of inositol trisphosphate to liberate calcium from intracellular stores. Such dysfunction may be at least partially responsible for impaired α 1 -adrenergic responsiveness during aging.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/0167488988900092; http://dx.doi.org/10.1016/0167-4889(88)90009-2; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0023858895&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/2829980; https://linkinghub.elsevier.com/retrieve/pii/0167488988900092; http://dx.doi.org/10.1016/0167-4889%2888%2990009-2; https://dx.doi.org/10.1016/0167-4889%2888%2990009-2
Elsevier BV
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