Interaction between RNF4 and SART3 is associated with the risk of schizophrenia

Area of Science:

• Genetics and Molecular Biology
• Neuroscience
• Psychiatry

Background:

• Schizophrenia (SCZ) pathogenesis is significantly influenced by genetic factors.
• Ring finger protein 4 (RNF4) and SART3 are implicated in nervous system development and have been previously linked to SCZ.
• The precise roles of RNF4 and SART3 in SCZ remain incompletely understood.

Purpose of the Study:

• To investigate the involvement of RNF4 and SART3 genetic variants in schizophrenia.
• To elucidate the molecular interaction between RNF4 and SART3 in the context of SCZ.
• To explore potential shared regulatory mechanisms contributing to SCZ risk.

Main Methods:

• Quantification of RNF4 and SART3 mRNA levels in peripheral blood of SCZ patients and controls.
• Targeted sequencing of single nucleotide polymorphisms (SNPs) in RNF4 and SART3 genes in SCZ patients and controls.
• In vitro experiments using HEK293T cells to study the interaction between RNF4, SART3, and NRF2.

Main Results:

• Elevated mRNA levels of RNF4 and SART3 were observed in both first-episode and chronic SCZ patients compared to controls.
• A specific combination of SNPs in RNF4 (rs1203860, rs2282765) and SART3 (rs2287550) was associated with an increased risk of SCZ.
• SART3 was found to downregulate RNF4 expression via ubiquitination, which in turn affected the expression of downstream factor NRF2.

Conclusions:

• The interaction between RNF4 and SART3 plays a role in the risk of developing schizophrenia.
• These findings suggest a shared regulatory mechanism involving RNF4 and SART3 in SCZ pathogenesis.
• The study provides insights into the molecular underpinnings of SCZ, potentially paving the way for novel therapeutic strategies.