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Transferrin gene expression and secretion by rat brain cells in vitro
A Espinosa de los Monteros1, S Kumar, S Scully
1Department of Anatomy and Cell Biology, University of California, Los Angeles.
Journal of Neuroscience Research
|April 1, 1990
Summary
Transferrin (Tf) is synthesized by oligodendrocytes and astrocytes in vitro, but not neurons. Hydrocortisone reduces Tf gene expression in astrocytes, suggesting epigenetic regulation.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Transferrin (Tf) is an early developmental marker for oligodendrocytes.
- Investigating Tf gene expression and synthesis in neural cells is crucial for understanding brain development and function.
Purpose of the Study:
- To determine Tf gene expression and synthesis in cultured rat neurons, astrocytes, and oligodendrocytes.
- To identify cell types responsible for Tf production in the central nervous system.
- To explore potential regulatory mechanisms of Tf expression.
Main Methods:
- Primary cell cultures of rat embryonic neurons, newborn glial cells (astrocytes and oligodendrocytes).
- Use of fibroblasts and C6 glioma cells as negative controls.
- Detection of Tf mRNA and protein synthesis and secretion.
Main Results:
- Tf mRNA was detected in neurons, astrocytes, and oligodendrocytes.
- Oligodendrocytes and astrocytes, but not neurons, synthesized and secreted Tf.
- Fibroblasts and C6 glioma cells showed no detectable Tf mRNA.
- Hydrocortisone significantly reduced Tf mRNA levels in astrocyte cultures.
Conclusions:
- Astrocytes and oligodendrocytes are capable of synthesizing and secreting Tf in vitro.
- Neural cell Tf production may be regulated by epigenetic factors like hydrocortisone.
- Tf expression in astrocytes might be repressed in vivo by such factors.