Cerebrospinal fluid synaptic biomarker changes in bipolar disorder - A longitudinal case-control study.

Area of Science:

• Neuroscience
• Biomarker Discovery
• Psychiatry

Background:

• Bipolar disorder (BD) shares cognitive impairments with Alzheimer's disease, and BD patients have an increased dementia risk.
• Investigating cerebrospinal fluid (CSF) synaptic protein biomarkers may elucidate the neurobiology of BD.
• This study explores potential links between synaptic dysfunction and BD.

Purpose of the Study:

• To investigate CSF synaptic protein biomarkers in bipolar disorder (BD).
• To identify potential neurobiological underpinnings of BD.
• To explore connections between BD, cognitive impairment, and dementia risk.

Main Methods:

• Examined 59 BD patients and 37 healthy controls (HC) over one year.
• Measured levels of specific synaptic proteins in CSF using liquid chromatography-mass spectrometry.
• Compared biomarker levels between BD and HC groups, and longitudinally within BD patients.

Main Results:

• No statistically significant differences in CSF synaptic proteins were found between BD patients and HC.
• CSF synaptic protein levels did not differ cross-sectionally or longitudinally in BD patients.
• Levels remained unaltered in BD patients during euthymia and at follow-up compared to baseline.

Conclusions:

• This study is the first to examine a panel of CSF synaptic dysfunction biomarkers in BD.
• No significant differences in these biomarkers were observed between BD patients and controls.
• The clinical significance of CSF biomarker concentrations in BD remains uncertain due to unknown release mechanisms.