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Protein kinase C and adaptation to ethanol
R Roivainen1, B Hundle, R O Messing
1Ernest Gallo Clinic & Research Center, Department of Neurology, University of California, San Francisco 94110.
EXS
|January 1, 1994
Summary
Chronic ethanol exposure alters brain cell signaling, increasing L-type calcium channels and neural differentiation via protein kinase C (PKC). This adaptation may offer drug targets for alcohol-related issues.
Area of Science:
- Neuroscience
- Pharmacology
- Cell Biology
Background:
- Chronic ethanol exposure leads to decreased sensitivity to its intoxicating effects.
- Protein signaling pathways are crucial for cellular adaptation to ethanol.
- Understanding these molecular changes is key to addressing alcohol's consequences.
Purpose of the Study:
- To investigate how chronic ethanol exposure affects neural cells.
- To identify the specific signaling proteins involved in ethanol adaptation.
- To explore the role of protein kinase C (PKC) in these adaptations.
Main Methods:
- Utilized the PC12 neural cell line for experiments.
- Chronic exposure of PC12 cells to ethanol.
- Assessed changes in L-type voltage-gated calcium channels and neural differentiation.
- Investigated the role of protein kinase C (PKC) and its isozymes (delta and epsilon).
Main Results:
- Chronic ethanol exposure increased expression and function of L-type voltage-gated calcium channels.
- Ethanol enhanced nerve growth factor-induced neural differentiation.
- Both responses were dependent on protein kinase C (PKC) activation.
- Ethanol increased the expression of PKC delta and epsilon isozymes.
Conclusions:
- Protein kinase C (PKC) plays a critical role in neural adaptation to chronic ethanol exposure.
- Ethanol-induced changes in calcium channels and neural differentiation are mediated by PKC.
- PKC isozymes delta and epsilon are involved in mediating these adaptive responses.
- The PKC enzyme family represents a potential therapeutic target for mitigating alcohol's effects.