Oxidatively Modified LDL Suppresses Lymphangiogenesis via CD36 Signaling. 2021

Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA.

Arterial accumulation of plasma-derived LDL and its subsequent oxidation contributes to atherosclerosis. Lymphatic vessel (LV)-mediated removal of arterial cholesterol has been shown to reduce atherosclerotic lesion formation. However, the precise mechanisms that regulate LV density and function in atherosclerotic vessels remain to be identified. The aim of this study was to investigate the role of native LDL (nLDL) and oxidized LDL (oxLDL) in modulating lymphangiogenesis and underlying molecular mechanisms. Western blotting and immunostaining experiments demonstrated increased oxLDL expression in human atherosclerotic arteries. Furthermore, elevated oxLDL levels were detected in the adventitial layer, where LV are primarily present. Treatment of human lymphatic endothelial cells (LEC) with oxLDL inhibited in vitro tube formation, while nLDL stimulated it. Similar results were observed with Matrigel plug assay in vivo. CD36 deletion in mice and its siRNA-mediated knockdown in LEC prevented oxLDL-induced inhibition of lymphangiogenesis. In addition, oxLDL via CD36 receptor suppressed cell cycle, downregulated AKT and eNOS expression, and increased levels of p27 in LEC. Collectively, these results indicate that oxLDL inhibits lymphangiogenesis via CD36-mediated regulation of AKT/eNOS pathway and cell cycle. These findings suggest that therapeutic blockade of LEC CD36 may promote arterial lymphangiogenesis, leading to increased cholesterol removal from the arterial wall and reduced atherosclerosis.

UI MeSH Term Description Entries

Related Publications

Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
January 1990, Free radical biology & medicine,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
March 2007, FASEB journal : official publication of the Federation of American Societies for Experimental Biology,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
April 1996, Critical reviews in food science and nutrition,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
January 1994, Biochimica et biophysica acta,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
November 2007, Molecular and cellular biochemistry,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
September 1994, Kidney international,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
August 1990, Journal of lipid research,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
March 2004, Circulation research,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
July 1992, Arteriosclerosis and thrombosis : a journal of vascular biology,
Bhupesh Singla, and Hui-Ping Lin, and WonMo Ahn, and Joseph White, and Gábor Csányi
March 1998, Atherosclerosis,
Copied contents to your clipboard!