Long Non-Coding RNA BCYRN1 Drives Cellular Processes to Promote Asthma Development.

Area of Science:

• Respiratory Medicine
• Molecular Biology
• Genetics

Background:

• Asthma is a prevalent chronic inflammatory respiratory disease globally.
• The role of long non-coding RNA BCYRN1 in bronchial smooth muscle cells (BSMCs) during asthma pathogenesis is not well understood.
• BCYRN1's known functions include inhibiting smooth muscle cell differentiation and vascular development.

Purpose of the Study:

• To investigate the expression and function of lncRNA BCYRN1 in asthma.
• To explore the molecular mechanisms of BCYRN1 in BSMCs.
• To evaluate BCYRN1 as a potential biomarker for asthma.

Main Methods:

• Quantitative real-time polymerase chain reaction (RT-qPCR) to measure lncRNA BCYRN1 levels in asthma patients' blood and sputum.
• In vitro assays (cell counting kit-8, Transwell, colony formation, flow cytometry) to assess BCYRN1's impact on BSMC proliferation, migration, apoptosis, and cell cycle.
• RNA sequencing (RNA-seq) to identify differentially expressed genes following BCYRN1 manipulation, with RT-qPCR validation.

Main Results:

• LncRNA BCYRN1 expression was significantly upregulated in asthma patients.
• Overexpression of BCYRN1 promoted BSMC proliferation and migration, inhibited apoptosis, and affected cell cycle progression.
• Inhibition of BCYRN1 reversed these effects. RNA-seq identified 434 differentially expressed genes linked to external stimuli, cell cycle, growth factors, and inflammation.

Conclusions:

• Highly expressed lncRNA BCYRN1 in asthma patients, coupled with functional and transcriptomic data, indicates its role in asthma development.
• LncRNA BCYRN1 shows promise as a diagnostic and prognostic biomarker for asthma.