Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0022116 (ischemia)
 91,303 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Oxidative stress is an important mechanism of cell death in Parkinson's disease (PD) and brain ischemia. Vitamins C, E and A are important antioxidants and deficiency of these agents has been implicated in the mechanisms of atherosclerosis. We measured the levels of the above antioxidant vitamins in 44 patients with PD, 12 patients with vascular parkinsonism (VP), 11 patients with other parkinsonism syndromes of various causes and 39 controls. Vitamin A levels did not differ between groups. Vitamins C and E were found decreased in VP, while they were normal in PD indicating low levels of antioxidant vitamins in VP and stressing the necessity of maintaining sufficient dietary intake of these agents in the elderly.
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PMID:Plasma levels of antioxidant vitamins C and E are decreased in vascular parkinsonism. 1554 5

In this study we evaluated the neuroprotective potential of vitamin A (all-trans retinol), and its geometric isomers, all-trans retinoic acid and 9-cis retinoic acid, in a focal model of ischemia. A 60 minute middle cerebral artery occlusion in C57 mice resulted in over 50% hemispheric infarction. Vitamin A (retinol) and its derivatives were administered as two i.p. injections immediately prior to and following ischemia. A reduction in infarct volume was observed with all-trans retinol, in a dose-dependent manner: maximum protection was observed with a 10 mg/kg dose. A similar protective profile was observed with all-trans retinol, but not the stereo-isomer 9-cis retinoic acid. Administration of the derivatives 1 h following ischemia did not produce significant protection. Taken together these data suggest a possible use of vitamin A derivatives as an acute neuroprotective strategy for stroke.
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PMID:Stereo-selective neuroprotection against stroke with vitamin A derivatives. 1882 56