Ikjun Lee, Shuyu Piao, Seonhee Kim, Harsha Nagar, Su-Jeong Choi, Byeong Hwa Jeon, Sang-Ha Oh, Kaikobad Irani, Cuk-Seong Kim
Elevated plasma homocysteine levels can induce vascular endothelial dysfunction; however, the mechanisms regulating homocysteine metabolism in impaired endothelial cells are currently unclear. In this study, we deleted the essential mitoribosomal gene CR6 interacting factor 1 (CRIF1) in human umbilical vein endothelial cells (HUVECs) and mice to induce endothelial cell dysfunction; then, we monitored homocysteine accumulation. We found that CRIF1 downregulation caused significant increases in intracellular and plasma concentrations of homocysteine, which were associated with decreased levels of folate cycle intermediates such as 5-methyltetrahydrofolate (MTHF) and tetrahydrofolate (THF)...
October 20, 2021: Antioxidants (Basel, Switzerland)