Expression and Function of Long Non-coding RNA in Endemic Cretinism.

Area of Science:

• Genetics
• Molecular Biology
• Endocrinology

Background:

• Endemic cretinism (EC) is a severe iodine deficiency disorder with unclear genetic contributions.
• Neurodevelopmental impairments and mental deficits are characteristic symptoms of EC.
• Understanding the genetic basis of EC is crucial for developing effective interventions.

Purpose of the Study:

• To investigate the differential expression profiles of long non-coding RNA (lncRNA) and messenger RNA (mRNA) in endemic cretinism (EC).
• To identify potential molecular players and pathways involved in the pathogenesis of EC.
• To explore the interaction between lncRNAs and mRNAs in EC patients.

Main Methods:

• High-throughput RNA sequencing (RNA-seq) was employed to analyze lncRNA and mRNA expression.
• Gene Ontology (GO) and KEGG pathway analyses were performed for functional annotation.
• Protein-protein interaction (PPI) network construction and quantitative real-time PCR (qRT-PCR) were utilized for validation.

Main Results:

• A total of 864 lncRNAs and 393 mRNAs were found to be differentially expressed between EC patients and controls.
• The PPI network revealed key protein-coding genes, with LINC01220 and its target mRNA IDO1 showing statistically elevated levels in EC patients.
• The regulation of postsynaptic membrane potential and the Rap1 signaling pathway were implicated in EC pathophysiology.

Conclusions:

• Differentially expressed lncRNAs, particularly LINC01220, represent potential novel players in the pathogenesis of EC.
• The interaction between LINC01220 and IDO1 may contribute to the development of EC.
• These findings provide valuable insights into the molecular mechanisms underlying EC.