What question did this study set out to answer?

To examine how cell density, serum conditions, and proliferation rates regulate the expression of myelin genes and proteins in immortalized S16 Schwann cells.

April 1, 1996Journal of Neurochemistry

Myelin Gene Expression in Immortalized Schwann Cells: Relationship to Cell Density and Proliferation

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To examine how cell density, serum conditions, and proliferation rates regulate the expression of myelin genes and proteins in immortalized S16 Schwann cells.
Cultured immortalized S16 Schwann cells under varying cell densities in serum-containing or defined serum-free medium.
Quantified cell proliferation rates using direct cell counts and [3H]thymidine incorporation assays.
Measured protein and mRNA levels of P0, MAG, PMP-22, and nonmyelin L1 using western blotting and RNase protection assays, while evaluating conditioned medium and cyclic AMP.
Slower-proliferating S16 cells in serum-free medium expressed substantially higher levels of P0 glycoprotein and myelin-associated glycoprotein (MAG) than rapidly proliferating cells in serum-supplemented medium.
High cell density increased P0 and MAG mRNA and protein levels, as well as PMP-22 mRNA, without decreasing proliferation rates or changing cyclic AMP levels.
Conditioned medium from high-density cultures failed to stimulate myelin gene expression in sparse cells, indicating that density-dependent upregulation relies on direct cell-to-cell contact rather than soluble factors.

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Implication

In vitro study reveals elevated myelin gene expression at high density and slow growth in S16 Schwann cells, indicating contact-mediated regulation.

Cite This Study

Sasagasako et al. (1996) studied this question.

synapsesocial.com/papers/6a8727f5f87adc0a02ca3139 https://doi.org/10.1046/j.1471-4159.1996.66041432.x

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Implication

In vitro study reveals elevated myelin gene expression at high density and slow growth in S16 Schwann cells, indicating contact-mediated regulation.

Myelin Gene Expression in Immortalized Schwann Cells: Relationship to Cell Density and Proliferation

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Discussion

Implication

Cite This Study

Myelin Gene Expression in Immortalized Schwann Cells: Relationship to Cell Density and Proliferation

Key Points

Discussion

Implication

Cite This Study

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