Transcriptome analysis of lncRNA expression patterns in human congenital lung malformations

Area of Science:

• Genomics
• Molecular Biology
• Developmental Biology

Background:

• Congenital lung malformations (CLMs) are a spectrum of developmental abnormalities.
• Understanding the molecular basis of CLMs is crucial for diagnosis and treatment.
• Long non-coding RNAs (lncRNAs) are increasingly recognized for their roles in gene regulation and disease.

Purpose of the Study:

• To comprehensively analyze lncRNA expression patterns across different subtypes of CLMs.
• To investigate the potential biological functions of identified lncRNAs in CLMs.
• To identify specific lncRNAs and their associated pathways involved in CLM development.

Main Methods:

• RNA sequencing (RNA-seq) was performed on lesion and normal lung tissues from patients with CPAM-I, CPAM-II, ILS, and ILS-CPAM.
• Bioinformatics analyses were used to characterize lncRNA expression profiles and functions.
• lncRNA-mRNA co-expression networks and gene set enrichment analysis (GSEA) were employed to predict molecular mechanisms.

Main Results:

• Over 5921 lncRNA transcripts were identified, with significant differences in expression between CLM subtypes and normal lung tissue.
• Specific lncRNAs were found to be upregulated or downregulated in CPAM-I, CPAM-II, ILS, and ILS-CPAM.
• Differentially expressed genes were enriched in immune system regulation, cell projection organization, and inflammatory pathways.
• The lncRNA FLJ26850 was identified as potentially related to CLMs via ZNF473.

Conclusions:

• Distinct lncRNA expression profiles characterize different subtypes of congenital lung malformations.
• The lncRNA FLJ26850, potentially acting through ZNF473, is implicated in the pathogenesis of CLMs.
• These findings provide novel insights into the molecular mechanisms underlying CLMs.