Cigarette Smoke-Induced Epithelial-to-Mesenchymal Transition: Insights into Cellular Mechanisms and Signaling...

Area of Science:

• Pulmonary Cell Biology
• Molecular Toxicology
• Cancer Research

Background:

• Cigarette smoke (CS) exposure is a major risk factor for respiratory diseases.
• Epithelial-to-mesenchymal transition (EMT) is a critical cellular process implicated in disease progression.
• Understanding CS-induced EMT in human bronchial epithelial cells (HBECs) is vital for developing therapeutic strategies.

Purpose of the Study:

• To review the molecular mechanisms of CS-induced EMT in HBECs.
• To identify research gaps and limitations in current methodologies.
• To provide a foundation for future research into CS-induced EMT.

Main Methods:

• Literature review of studies investigating CS-induced EMT in HBECs.
• Analysis of signaling pathways involved in CS-induced EMT, including WNT/β-catenin, TGF-β/SMAD, hypoxia, oxidative stress, PI3K/Akt, and NF-κB.
• Critical evaluation of research methodologies, focusing on cell culture models and consideration of genetic/epigenetic factors.

Main Results:

• CS induces EMT in HBECs through intricate molecular signaling pathways.
• Current research predominantly utilizes 2D cell cultures, potentially limiting biological relevance.
• Genetic and epigenetic factors in CS-induced EMT have been largely overlooked in recent studies.

Conclusions:

• CS-induced EMT is a complex process involving multiple signaling pathways.
• There is a critical need to move beyond 2D culture models to more accurately simulate in vivo conditions.
• Future research should incorporate genetic and epigenetic analyses to comprehensively understand CS-induced EMT.