PMID: 9526044Apr 4, 1998Paper

Calbindin-D28k buffers intracellular calcium and promotes resistance to degeneration in PC12 cells

Brain Research. Molecular Brain Research
A McMahonD C German

Abstract

The calcium-binding protein calbindin-D28k (CB) has been hypothesized to function, in part, as a neuroprotective protein. CB is localized within nerve cells that are often less vulnerable to degeneration in patients with Alzheimer's disease and Parkinson's disease, and cells containing CB can buffer intracellular calcium concentrations ([Ca2+]i). The present study was designed to directly test the hypothesis that CB can protect cells from degeneration by reducing [Ca2+]i. PC12 cells, transfected to express different levels of CB, were found to be significantly less vulnerable to degeneration caused by serum withdrawal, glutamate, and the neurotoxin 1-methyl-4-phenylpyridinium (MPP+). However, CB did not protect cells from degeneration caused by the calcium ionophore A23187. CB-transfected cells exhibited reduced elevations in [Ca2+]i following treatment with bradykinin, or ATP compared to non-CB-containing cells. These data indicate that CB can protect cells from degeneration caused by certain conditions, and it reduces elevations in [Ca2+]i caused by influx from extracellular sources.

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Mar 23, 2004·Toxicon : Official Journal of the International Society on Toxinology·A FranchiniE Ottaviani
Mar 26, 2003·Brain Research. Molecular Brain Research·Pamela I HammondStephen Brimijoin
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