Neurodevelopmental Implications Underpinning Hereditary Spastic Paraplegia.

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Hereditary spastic paraplegia (HSP) comprises rare genetic disorders affecting the corticospinal tract.
• Protein abnormalities in HSP are also found in early-onset childhood brain disorders, suggesting a neurodevelopmental link.

Purpose of the Study:

• To investigate the neurodevelopmental aspects of Hereditary spastic paraplegia.
• To analyze clinical features, gene expression, and functional roles of HSP-implicated proteins in central nervous system development.

Main Methods:

• Clinical feature summarization of 89 HSP subtypes.
• Analysis of HSP gene expression trajectories during prenatal cortical development.
• Review of studies using induced pluripotent stem cells (iPSCs)/organoids and mouse models.

Main Results:

• Most HSP subtypes manifest symptoms in infancy or early childhood.
• HSP patients exhibit neurodevelopmental phenotypes like microcephaly and ventricular enlargement.
• HSP genes are broadly expressed during critical prenatal neurodevelopmental periods (8-24 weeks post-conception).

Conclusions:

• HSP has significant neurodevelopmental origins, challenging the purely degenerative disease model.
• HSP proteins play critical roles in central nervous system development.
• Understanding HSP as a neurodevelopmental disorder may improve insights into its pathogenesis.