Long noncoding RNA ANRIL alleviates hypoxia-induced pulmonary microvascular endothelial cell damage

Area of Science:

• Pulmonary Medicine
• Molecular Biology
• Cell Biology

Background:

• High-altitude pulmonary edema (HAPE) is a critical condition.
• Long noncoding RNAs (lncRNAs) are implicated in HAPE pathogenesis.
• The specific role of ANRIL in HAPE remains unclear.

Purpose of the Study:

• To investigate the mechanism of ANRIL in hypoxic injury of pulmonary microvascular endothelial cells (PMVECs).
• To explore the effect of ANRIL on PMVEC function under hypoxic conditions.

Main Methods:

• Established a hypoxic model of PMVECs.
• Manipulated ANRIL expression (overexpression) and miR-181c-5p levels (knockdown).
• Assessed cell proliferation, apoptosis, migration, and levels of key proteins and factors.

Main Results:

• Hypoxia suppressed PMVEC proliferation and migration, increasing apoptosis, decreasing ANRIL, and increasing miR-181c-5p.
• ANRIL overexpression protected PMVECs from hypoxic injury, reducing inflammatory and apoptosis markers.
• ANRIL and miR-181c-5p knockdown exhibited similar protective effects against hypoxia.

Conclusions:

• ANRIL protects against hypoxia-induced injury in PMVECs.
• This protection is mediated through the negative regulation of miR-181c-5p.
• ANRIL represents a potential therapeutic target for HAPE.