Functional Expression and Characterization of a Voltage-Gated CaV1.3 (α1D) Calcium Channel Subunit from an Insulin-Secreting Cell Line
Population
Xenopus oocytes expressing neuroendocrine CaV1.3 or cardiac CaV1.2a subunits together with alpha2delta- and…
Comparison
Electrophysiological characterization and… vs Cardiac L-type channel CaV1.2a and neuronal…
Design
Preclinical
Authors
Discussion
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Member takes
Implication
Subtype differences may guide CaV1.3-selective targeting in neuroendocrine disease; leaves open human translation from animal models.
Structured PICO
P
Population
Xenopus oocytes expressing neuroendocrine CaV1.3 (cloned from HIT-T15 cells) or cardiac CaV1.2a subunits together with alpha2delta- and beta3-subunits
I
Intervention
Electrophysiological characterization and pharmacological modulation (GPCR ligands, phorbol-12-myristate-13-acetate, kinase inhibitors, wortmannin, (+)isradipine)
C
Comparator
Cardiac L-type channel CaV1.2a and neuronal CaV2.2 channel
O
Outcome
Biophysical properties (current voltage relation, voltage dependence of inactivation, activation/inactivation kinetics) and receptor regulationsurrogate
The neuroendocrine CaV1.3 calcium channel differs significantly in biophysical characteristics and GPCR regulation from the cardiac CaV1.2a subtype, suggesting distinct physiological roles.
Cite This Study
Scholze et al. (2001) studied this question.