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Age-related differences in mouse Schwann cell response to cyclic AMP
1Department of Pathology and Laboratory Medicine, School of Medicine, University of North Carolina at Chapel Hill 27599-7525, USA.
Brain Research
|May 6, 1996
Summary
Schwann cells from young mice show increased proliferation and differentiation in response to cyclic adenosine monophosphate (cAMP). Older mice exhibit reduced sensitivity to cAMP, indicating age-related changes in these critical nerve cells.
Area of Science:
- Neuroscience
- Cell Biology
- Developmental Biology
Background:
- Intracellular cyclic adenosine 3', 5'-monophosphate (cAMP) influences Schwann cell proliferation and galactocerebroside (galC) expression.
- Schwann cells are crucial for peripheral nerve myelination and repair.
Purpose of the Study:
- To investigate age-related differences in Schwann cell responses to cAMP.
- To determine the effect of forskolin, an adenylate cyclase activator, on proliferation and differentiation in young versus adult mice.
Main Methods:
- Cultured Schwann cells from mice at postnatal days 3, 10, and 30.
- Treatment with forskolin to elevate intracellular cAMP levels.
- Assessed proliferation and surface galactocerebroside (galC) expression.
Main Results:
- Forskolin stimulated galC expression and proliferation in Schwann cells from P3 and P10 mice, but not P30 mice.
- Schwann cells from P30 mice required higher fetal bovine serum (FBS) concentrations for proliferation.
- A progressive decrease in surface galC-positive cells was observed over time in vitro across all age groups.
Conclusions:
- Schwann cells from suckling mice are more responsive to cAMP-mediated proliferative and differentiating signals than adult Schwann cells.
- Age-dependent differences in Schwann cell responses to cAMP may reflect intrinsic metabolic changes related to myelination status in vivo.