Long non-coding RNA expression profiles in hereditary haemorrhagic telangiectasia

Area of Science:

• Genetics and Molecular Biology
• Vascular Biology
• Transcriptomics

Background:

• Hereditary Haemorrhagic Telangiectasia (HHT) is an autosomal dominant vascular disorder.
• HHT is primarily caused by mutations in ENG and ACVRL1, part of the TGF-β signaling pathway.
• The precise molecular mechanisms underlying HHT manifestations are not fully understood.

Purpose of the Study:

• To investigate the potential role of long non-coding RNAs (lncRNAs) in the molecular pathogenesis of HHT.
• To identify differentially expressed lncRNAs in HHT-affected tissues.

Main Methods:

• Microarray profiling of lncRNA transcripts from HHT nasal telangiectasial and non-telangiectasial tissues.
• Annotation of microarray probes using the GENCODE v.16 dataset.
• Differential expression analysis and pathway enrichment analysis (GREAT tool).

Main Results:

• Identified 4,810 probes corresponding to 2,811 lncRNAs.
• Discovered 42 differentially expressed lncRNAs between HHT telangiectasial and non-telangiectasial tissues (q<0.001).
• Enriched lncRNAs were associated with genomic loci involved in key HHT-related pathways.

Conclusions:

• Aberrantly expressed lncRNAs are present in HHT telangiectasia.
• lncRNAs may contribute to the regulation of protein-coding genes in HHT.
• Further research into lncRNAs in HHT could reveal novel therapeutic targets for telangiectasia formation.