PMID- 30429785 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240404 IS - 1663-4365 (Print) IS - 1663-4365 (Electronic) IS - 1663-4365 (Linking) VI - 10 DP - 2018 TI - Hyperhomocysteinemia as a Risk Factor for Vascular Contributions to Cognitive Impairment and Dementia. PG - 350 LID - 10.3389/fnagi.2018.00350 [doi] LID - 350 AB - Behind only Alzheimer's disease, vascular contributions to cognitive impairment and dementia (VCID) is the second most common cause of dementia, affecting roughly 10-40% of dementia patients. While there is no cure for VCID, several risk factors for VCID, such as diabetes, hypertension, and stroke, have been identified. Elevated plasma levels of homocysteine, termed hyperhomocysteinemia (HHcy), are a major, yet underrecognized, risk factor for VCID. B vitamin deficiency, which is the most common cause of HHcy, is common in the elderly. With B vitamin supplementation being a relatively safe and inexpensive therapeutic, the treatment of HHcy-induced VCID would seem straightforward; however, preclinical and clinical data shows it is not. Clinical trials using B vitamin supplementation have shown conflicting results about the benefits of lowering homocysteine and issues have arisen over proper study design within the trials. Studies using cell culture and animal models have proposed several mechanisms for homocysteine-induced cognitive decline, providing other targets for therapeutics. For this review, we will focus on HHcy as a risk factor for VCID, specifically, the different mechanisms proposed for homocysteine-induced cognitive decline and the clinical trials aimed at lowering plasma homocysteine. FAU - Price, Brittani R AU - Price BR AD - Department of Physiology, Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States. FAU - Wilcock, Donna M AU - Wilcock DM AD - Department of Physiology, Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States. FAU - Weekman, Erica M AU - Weekman EM AD - Department of Physiology, Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, United States. LA - eng GR - F31 NS092202/NS/NINDS NIH HHS/United States GR - RF1 AG057754/AG/NIA NIH HHS/United States GR - R01 NS097722/NS/NINDS NIH HHS/United States GR - R01 NS079637/NS/NINDS NIH HHS/United States GR - P30 AG028383/AG/NIA NIH HHS/United States PT - Journal Article PT - Review DEP - 20181031 PL - Switzerland TA - Front Aging Neurosci JT - Frontiers in aging neuroscience JID - 101525824 PMC - PMC6220027 OTO - NOTNLM OT - B vitamins OT - dementia OT - homocysteine OT - hyperhomocysteinemia OT - vascular cognitive impairment and dementia EDAT- 2018/11/16 06:00 MHDA- 2018/11/16 06:01 PMCR- 2018/01/01 CRDT- 2018/11/16 06:00 PHST- 2018/06/06 00:00 [received] PHST- 2018/10/16 00:00 [accepted] PHST- 2018/11/16 06:00 [entrez] PHST- 2018/11/16 06:00 [pubmed] PHST- 2018/11/16 06:01 [medline] PHST- 2018/01/01 00:00 [pmc-release] AID - 10.3389/fnagi.2018.00350 [doi] PST - epublish SO - Front Aging Neurosci. 2018 Oct 31;10:350. doi: 10.3389/fnagi.2018.00350. eCollection 2018.