PMID- 33080955 OWN - NLM STAT- MEDLINE DCOM- 20210223 LR - 20210223 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 21 IP - 20 DP - 2020 Oct 18 TI - Homocysteine and Mitochondria in Cardiovascular and Cerebrovascular Systems. LID - 10.3390/ijms21207698 [doi] LID - 7698 AB - Elevated concentration of homocysteine (Hcy) in the blood plasma, hyperhomocysteinemia (HHcy), has been implicated in various disorders, including cardiovascular and neurodegenerative diseases. Accumulating evidence indicates that pathophysiology of these diseases is linked with mitochondrial dysfunction. In this review, we discuss the current knowledge concerning the effects of HHcy on mitochondrial homeostasis, including energy metabolism, mitochondrial apoptotic pathway, and mitochondrial dynamics. The recent studies suggest that the interaction between Hcy and mitochondria is complex, and reactive oxygen species (ROS) are possible mediators of Hcy effects. We focus on mechanisms contributing to HHcy-associated oxidative stress, such as sources of ROS generation and alterations in antioxidant defense resulting from altered gene expression and post-translational modifications of proteins. Moreover, we discuss some recent findings suggesting that HHcy may have beneficial effects on mitochondrial ROS homeostasis and antioxidant defense. A better understanding of complex mechanisms through which Hcy affects mitochondrial functions could contribute to the development of more specific therapeutic strategies targeted at HHcy-associated disorders. FAU - Kaplan, Peter AU - Kaplan P AD - Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia. FAU - Tatarkova, Zuzana AU - Tatarkova Z AD - Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia. FAU - Sivonova, Monika Kmetova AU - Sivonova MK AD - Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia. FAU - Racay, Peter AU - Racay P AD - Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia. FAU - Lehotsky, Jan AU - Lehotsky J AD - Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia. LA - eng GR - 1/0004/19/Vedecka Grantova Agentura MSVVaS SR a SAV/ GR - 26220220114/EU sources and European Regional Development Fund/ PT - Journal Article PT - Review DEP - 20201018 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0LVT1QZ0BA (Homocysteine) SB - IM MH - Animals MH - Brain/*blood supply MH - Cardiovascular System/*metabolism MH - Energy Metabolism MH - Homocysteine/chemistry/*metabolism MH - Humans MH - Mitochondria/*metabolism MH - Oxidative Stress PMC - PMC7589705 OTO - NOTNLM OT - ROS OT - brain OT - heart OT - homocysteine OT - hyperhomocysteinemia OT - mitochondria OT - oxidative stress COIS- The authors declare no conflict of interest. EDAT- 2020/10/22 06:00 MHDA- 2021/02/24 06:00 PMCR- 2020/10/01 CRDT- 2020/10/21 01:02 PHST- 2020/10/02 00:00 [received] PHST- 2020/10/15 00:00 [revised] PHST- 2020/10/16 00:00 [accepted] PHST- 2020/10/21 01:02 [entrez] PHST- 2020/10/22 06:00 [pubmed] PHST- 2021/02/24 06:00 [medline] PHST- 2020/10/01 00:00 [pmc-release] AID - ijms21207698 [pii] AID - ijms-21-07698 [pii] AID - 10.3390/ijms21207698 [doi] PST - epublish SO - Int J Mol Sci. 2020 Oct 18;21(20):7698. doi: 10.3390/ijms21207698.