Research Progress on the Molecular Mechanism of LRP1 and TGFβ-PDGFRβ Signaling Network in Atherosclerosis and...

Area of Science:

• Cardiovascular Biology
• Molecular Medicine
• Cellular Signaling

Background:

• Atherosclerosis (AS) is a major cause of cardiovascular and cerebrovascular diseases, driven by lipid deposition, inflammation, and vascular remodeling.
• Low-density lipoprotein receptor-associated protein 1 (LRP1) is a key regulator of vascular homeostasis in AS.
• LRP1 influences lipid handling, inflammation, transforming growth factor beta (TGFβ) signaling, and platelet-derived growth factor receptor beta (PDGFRβ) trafficking.

Purpose of the Study:

• To review the structure and function of LRP1 in the context of AS and vascular remodeling.
• To elucidate the intricate LRP1-TGFβ-PDGFRβ signaling network, distinguishing demonstrated mechanisms from inferred cross-talk.
• To propose an integrated, cell- and stage-dependent regulatory model for LRP1's role in AS.

Main Methods:

• Systematic review of existing literature on LRP1, TGFβ, and PDGFRβ in atherosclerosis.
• Analysis of LRP1-mediated regulation of TGFβ and PDGFRβ signaling pathways.
• Examination of cell-specific effects of LRP1 in vascular smooth muscle cells, macrophages, endothelial cells, and pericytes.

Main Results:

• LRP1 plays a multifaceted role in vascular homeostasis and AS progression.
• The relationship between LRP1, TGFβ, and PDGFRβ is complex and context-dependent, not a simple linear pathway.
• Cell-specific functions of LRP1 highlight its diverse roles in different vascular cell types.

Conclusions:

• A deeper understanding of the cell- and stage-dependent LRP1-TGFβ-PDGFRβ network is crucial for elucidating AS mechanisms.
• This knowledge can inform novel strategies for risk stratification and precise intervention in AS.
• Potential translational strategies include lipid-lowering, anti-inflammatory therapies, and targeted modulation of LRP1, TGFβ, and PDGFRβ pathways.