Related Experiment Video
Updated: Aug 15, 2026
Preparation of Rat Oligodendrocyte Progenitor Cultures and Quantification of Oligodendrogenesis Using Dual-infrared Fluorescence Scanning
Published on: February 17, 2016
Serum factors and hydrocortisone influence the synthesis of myelin basic proteins in mouse brain primary cultures
1Mental Retardation Research Center, UCLA School of Medicine 90024.
Abstract:
Mouse brain primary cultures were used to study the influence of serum factors and hydrocortisone on myelin basic protein (MBP) gene expression. Serum factors increased the synthesis of the MBP isoforms in 18-day and older cultures. Synthesis of the 17 and 18.5 kDa MBPs steadily increased from 14 to 26 DIV (days in vitro). Synthesis of the 14 kDa MBP reached a peak at 22 days, after which it fell off rapidly. Addition of serum to the medium also stimulated MBP mRNA expression. However, in the presence of serum, maximal stimulation of MBP mRNA expression occurred at 16-20 days, significantly earlier than maximal stimulation of 17 and 18.5 kDa MBP synthesis by serum. These observations suggest that serum influences both transcriptional and post-transcriptional steps in the expression of the MBP genes in primary cultures. Hydrocortisone increased the synthesis of the 14, 18.5 and 17 kDa MBP isoforms by two- to three-fold. This effect was seen in cultures older than 15 DIV. This effect of hydrocortisone on the synthesis of the MBPs may be responsible for the increase in the steady state levels of MBP in the presence of hydrocortisone. These studies suggest a role for serum factors and hydrocortisone in the transcriptional and post-transcriptional steps of MBP gene expression. They also suggest that this role may be developmentally regulated.
Insights
Serum factors and hydrocortisone influence myelin basic protein (MBP) gene expression in mouse brain cultures. These factors affect both mRNA and protein synthesis, with effects varying by developmental stage.
Area of Science:
- Neuroscience
- Molecular Biology
- Developmental Biology
Background:
- Myelin basic protein (MBP) is crucial for myelin sheath formation in the central nervous system.
- Understanding the regulation of MBP gene expression is vital for studying myelin development and disorders.
Purpose of the Study:
- To investigate the impact of serum factors and hydrocortisone on MBP gene expression in mouse brain primary cultures.
- To determine the developmental regulation of MBP synthesis and mRNA levels.
Main Methods:
- Primary mouse brain cultures were utilized.
- MBP synthesis and mRNA expression were analyzed at various days in vitro (DIV).
- The effects of serum supplementation and hydrocortisone treatment were assessed.
Main Results:
- Serum factors enhanced MBP isoform synthesis in cultures older than 18 days and stimulated MBP mRNA expression earlier (16-20 DIV).
- Hydrocortisone increased MBP isoform synthesis (14, 17, and 18.5 kDa) by two- to three-fold in cultures older than 15 DIV.
- Serum influenced both transcriptional and post-transcriptional regulation of MBP gene expression, suggesting developmental timing.
Conclusions:
- Serum factors and hydrocortisone play significant roles in regulating MBP gene expression.
- These regulatory effects are influenced by the developmental stage of the primary cultures.
- Findings suggest complex transcriptional and post-transcriptional control mechanisms for MBP during development.
