CPT2 Deficiency Modeled in Zebrafish: Abnormal Neural Development, Electrical Activity, Behavior, and...

Area of Science:

• Mitochondrial biology and metabolic pathways
• Neurodevelopmental disorders and genetics
• Zebrafish as a model organism for human disease

Background:

• Carnitine palmitoyltransferase 2 (CPT2) is crucial for long-chain fatty acid beta-oxidation, an alternative energy source during development and starvation.
• CPT2 deficiency, a genetic disorder, has been linked to schizophrenia.
• Early life CPT2 deficiency may induce brain abnormalities predisposing to schizophrenia.

Purpose of the Study:

• To investigate the impact of CPT2 deficiency on early vertebrate development and brain function using a zebrafish model.
• To explore the potential link between CPT2 deficiency and the molecular pathways associated with schizophrenia.

Main Methods:

• Carnitine palmitoyltransferase 2 (CPT2) was knocked down in zebrafish embryos.
• Observed developmental, morphological, and behavioral outcomes.
• Analyzed gene expression related to schizophrenia using RT-qPCR.

Main Results:

• CPT2 knockdown led to abnormal lipid metabolism, reduced body size, and impaired brain development in zebrafish.
• Disruptions in axonal projections, neurotransmitter synthesis, neuronal activity, and swimming behavior were noted.
• Significant upregulation of schizophrenia-associated genes was observed in CPT2-deficient zebrafish.

Conclusions:

• Zebrafish serve as a valuable model for studying beta-oxidation's role in vertebrate development and brain function.
• CPT2 deficiency is linked to neurodevelopmental abnormalities and altered expression of schizophrenia-related genes.
• This study provides novel insights into CPT2's role in regulating genes associated with schizophrenia and neurodegenerative diseases.