PMID- 27417104 OWN - NLM STAT- MEDLINE DCOM- 20170629 LR - 20220409 IS - 1432-2013 (Electronic) IS - 0031-6768 (Linking) VI - 468 IP - 9 DP - 2016 Sep TI - Hyperhomocysteinemia impairs regional blood flow: involvements of endothelial and neuronal nitric oxide. PG - 1517-25 LID - 10.1007/s00424-016-1849-y [doi] AB - Increasing evidence support the idea that hyperhomocysteinemia (HHcy) is responsible for pathogenesis underlying cerebral, coronary, renal, and other vascular circulatory disorders and for hypertension. Impaired synthesis of nitric oxide (NO) in the endothelium or increased production of asymmetric dimethylarginine and activated oxygen species are involved in the impairment of vasodilator effects of NO. Impaired circulation in the brain derived from reduced synthesis and actions of NO would be an important triggering factor to dementia and Alzheimer's disease. Reduced actions of NO and brain hypoperfusion trigger increased production of amyloid-beta that inhibits endothelial function, thus establishing a vicious cycle for impairing brain circulation. HHcy is involved in the genesis of anginal attack and coronary myocardial infarction. HHcy is also involved in renal circulatory diseases. The homocysteine (Hcy)-induced circulatory failure is promoted by methionine and is prevented by increased folic acid and vitamin B6/B12. Eliminating poor life styles, such as smoking and being sedentary; keeping favorable dietary habits; and early treatment maintaining constitutive NOS functions healthy, reducing oxidative stresses would be beneficial in protecting HHcy-induced circulatory failures. FAU - Toda, Noboru AU - Toda N AUID- ORCID: 0000-0003-4035-7365 AD - Toyama Institute for Cardiovascular Pharmacology Research, 7-13, 1-Chome, Azuchimachi, Chuo-ku, Osaka, 541-0052, Japan. n.toda.toyama-bldg@orion.ocn.ne.jp. FAU - Okamura, Tomio AU - Okamura T AD - Department of Pharmacology, Shiga University of Medical Science, Seta, Otsu, Shiga, 520-2192, Japan. LA - eng PT - Journal Article PT - Review DEP - 20160714 PL - Germany TA - Pflugers Arch JT - Pflugers Archiv : European journal of physiology JID - 0154720 RN - EC 1.14.13.39 (Nitric Oxide Synthase Type I) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type III) SB - IM MH - Animals MH - *Cerebrovascular Circulation MH - *Coronary Circulation MH - Humans MH - Hyperhomocysteinemia/enzymology/*metabolism/physiopathology MH - Nitric Oxide Synthase Type I/*metabolism MH - Nitric Oxide Synthase Type III/*metabolism OTO - NOTNLM OT - Cerebral blood flow OT - Coronary blood flow OT - Hyperhomocysteinemia OT - Nitric oxide OT - Oxidative stress EDAT- 2016/07/16 06:00 MHDA- 2017/07/01 06:00 CRDT- 2016/07/16 06:00 PHST- 2016/04/12 00:00 [received] PHST- 2016/06/08 00:00 [accepted] PHST- 2016/06/06 00:00 [revised] PHST- 2016/07/16 06:00 [entrez] PHST- 2016/07/16 06:00 [pubmed] PHST- 2017/07/01 06:00 [medline] AID - 10.1007/s00424-016-1849-y [pii] AID - 10.1007/s00424-016-1849-y [doi] PST - ppublish SO - Pflugers Arch. 2016 Sep;468(9):1517-25. doi: 10.1007/s00424-016-1849-y. Epub 2016 Jul 14.