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Updated: May 25, 2025
Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome
Published on: June 15, 2016
miR-212-5p Regulates PM2.5-Induced Apoptosis by Targeting LAMC2 and LAMA3
Yunna Jia1, Xiqing Zhang1, Cuizhu Zhao1
1Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
Abstract:
Fine particulate matter (PM2.5) is often linked to a range of respiratory diseases and cellular damage. Although studies have shown that the expression profiles of microRNAs (miRNAs) are altered during lung damage brought on by PM2.5, the underlying functions of miRNAs remain poorly understood. In this research, we explored the role of PM2.5-induced apoptosis in detail and focused on the miRNA (miR-212-5p) that regulates apoptosis. Through a dual-luciferase assay, a direct targeting connection between laminin subunits γ2 (LAMC2) and α3 (LAMA3) and miR-212-5p was successfully demonstrated. This study focused on revealing the negative regulatory relationship between miR-212-5p and LAMC2 and LAMA3, providing important clues for a deeper understanding of the relevant physiological and pathological mechanisms. The present study showed that LAMC2 and LAMA3 positively regulate the PI3K-AKT pathway and negatively regulate the NF-κB pathway, which directly leads to significant changes in apoptosis rates. This study reveals a previously unrecognized molecular mechanism by showing that miR-212-5p directly targets LAMC2 and LAMA3 and thus associates with PM2.5-induced apoptosis via the PI3K/AKT/NF-κB pathway. These findings not only redefine the role of miR-212-5p in apoptosis but also open up new avenues for future research.
Insights
Fine particulate matter (PM2.5) exposure induces lung cell apoptosis. MicroRNA-212-5p targets LAMC2 and LAMA3, regulating cell death pathways and offering new insights into PM2.5-related lung damage.
Area of Science:
- Environmental Health
- Molecular Biology
- Cellular Biology
Background:
- Fine particulate matter (PM2.5) exposure is linked to respiratory diseases and cellular damage.
- MicroRNA (miRNA) expression changes are observed in PM2.5-induced lung injury, but their functions are unclear.
Purpose of the Study:
- To investigate the role of microRNA-212-5p (miR-212-5p) in PM2.5-induced apoptosis.
- To identify the molecular targets and pathways regulated by miR-212-5p in response to PM2.5 exposure.
Main Methods:
- Dual-luciferase reporter assay to confirm direct targeting of LAMC2 and LAMA3 by miR-212-5p.
- Analysis of the regulatory relationship between miR-212-5p, LAMC2, LAMA3, and apoptosis.
- Investigation of the involvement of PI3K-AKT and NF-κB signaling pathways.
Main Results:
- miR-212-5p directly targets the laminin subunits LAMC2 and LAMA3.
- LAMC2 and LAMA3 positively regulate the PI3K-AKT pathway and negatively regulate the NF-κB pathway.
- miR-212-5p modulates apoptosis rates by targeting LAMC2 and LAMA3 via the PI3K/AKT/NF-κB pathway.
Conclusions:
- A novel molecular mechanism is revealed where miR-212-5p targets LAMC2 and LAMA3, influencing PM2.5-induced apoptosis.
- This study redefines the role of miR-212-5p in apoptosis and its connection to environmental pollutants.
- Findings provide new avenues for understanding and potentially treating PM2.5-related lung pathologies.
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