Relationship Between Regulation of Polysialic Acid Expression and Brain Diseases

Area of Science:

• Neuroscience
• Biochemistry
• Pathology

Background:

• Polysialic acid (polySia) is a post-translational modification of neural cell adhesion molecules.
• Aberrant polySia expression is implicated in various neurological and psychiatric conditions.
• ST8SIA2 is the primary enzyme responsible for polySia biosynthesis.

Purpose of the Study:

• To review the intricate relationship between polySia, its biosynthetic enzyme ST8SIA2, and brain disorders.
• To explore the role of inflammation and the polySia degradation enzyme, sialidase (neuraminidase), in these diseases.

Main Methods:

• Literature review of studies investigating polySia, ST8SIA2, sialidase, and brain diseases.
• Analysis of the molecular mechanisms linking these components to disease pathogenesis.

Main Results:

• PolySia and ST8SIA2 dysregulation are associated with schizophrenia, bipolar disorder, autism spectrum disorders, Alzheimer's, Parkinson's, and Huntington's diseases.
• Inflammation significantly impacts polySia levels through modulation of sialidase activity.

Conclusions:

• PolySia and its metabolic enzymes are critical players in brain health and disease.
• Targeting polySia pathways may offer novel therapeutic strategies for neurological and psychiatric disorders.
• The interplay between inflammation and polySia metabolism warrants further investigation.