Oxidative stress and lectin-like ox-LDL-receptor LOX-1 in atherogenesis and tumorigenesis.

Abstract

Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) has been identified as a major receptor for oxidized low-density lipoprotein (ox-LDL) in endothelial cells, monocytes, platelets, cardiomyocytes, and vascular smooth muscle cells. Its expression is minimal under physiological conditions but can be induced under pathological conditions. The upregulation of LOX-1 by ox-LDL appears to be important for physiologic processes, such as endothelial cell proliferation, apoptosis, and endothelium remodeling. Pathophysiologic effects of ox-LDL in atherogenesis have also been firmly established, including endothelial cell dysfunction, smooth muscle cell growth and migration, monocyte transformation into macrophages, and finally platelet aggregation-seen in atherogenesis. Recent studies show a positive correlation between increased serum ox-LDL levels and an increased risk of colon, breast, and ovarian cancer. As in atherosclerosis, ox-LDL and its receptor LOX-1 activate the inflammatory pathway through nuclear factor-kappa B, leading to cell transformation. LOX-1 is important for maintaining the transformed state in developmentally diverse cancer cell lines and for tumor growth, suggesting a molecular connection between atherogenesis and tumorigenesis.

• Authors: Jingjun Lu, Sona Mitra, Xianwei Wang, Magomed Khaidakov, Jawahar L Mehta
• Journal: Antioxidants & redox signaling (Antioxid Redox Signal) Vol. 15 Issue 8 Pg. 2301-33 (Oct 15 2011) ISSN: 1557-7716 [Electronic] United States
• PMID: 21338316 (Publication Type: Journal Article, Review)

Chemical References

• Scavenger Receptors, Class E

Topics

• Animals
• Atherosclerosis (genetics, metabolism)
• Cell Transformation, Neoplastic (genetics, metabolism)
• Humans
• Oxidative Stress (genetics, physiology)
• Scavenger Receptors, Class E (genetics, metabolism)