Overview
Recent research indicates a role for a stress-related signal in potential brain repair mechanisms. Specifically, the stress hormone corticotropin-releasing hormone (CRH) has been identified as being rapidly released by myelin-producing precursor cells in proximity to damaged brain tissue. This release appears to influence the maturation of these precursor cells and their capacity to reconstruct protective nerve insulation. The same system has also been observed to affect overall brain development and the eventual thickness of myelin throughout an individual's life.
Findings
Researchers identified that myelin-producing precursor cells engage in the rapid release of CRH. This release occurs specifically in areas adjacent to damaged brain tissue. The function attributed to this CRH release is the control over the maturation process of these precursor cells. Consequently, this control mechanism aids in the rebuilding of protective nerve insulation. Beyond injury response, the observed system also exerts influence on broader brain development. Furthermore, it impacts the thickness of myelin in later stages of life.
Why This Matters
The findings offer new clues regarding the potential mechanisms through which early-life stress may contribute to the development of psychiatric disorders.