xanthine

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Related to Xanthin: Xanthan, Astaxanthin

xanthine

 [zan´thēn]
a purine compound found in most bodily tissues and fluids; it is a precursor of uric acid. Methylated xanthine compounds such as caffeine, theobromine, and theophylline are used for their bronchodilator effects.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

xan·thine (Xan),

(zan'thēn),
Oxidation product of guanine and hypoxanthine, precursor of uric acid; occurs in many organs and in the urine, occasionally forming urinary calculi; elevated in molybdenum cofactor deficiency and in xanthinuria.
Farlex Partner Medical Dictionary © Farlex 2012

xanthine

(zăn′thēn′, -thĭn)
n.
1. A yellowish-white, crystalline purine base, C5H4N4O2, that is a precursor of uric acid and is found in blood, urine, muscle tissue, and certain plants.
2. Any of several derivatives of this compound.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

xan·thine

(zan'thēn)
Oxidation product of guanine and hypoxanthine, precursor of uric acid; occurs in many organs and in the urine, occasionally forming urinary calculi.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
It is one of the green vegetables with highest levels of anti-oxidants (beta carotenes, xanthin and lutein).
* Fresh fruit has small amounts of vitamin-A and flavonoid pigments such as carotene-fl, xanthin, lutein and cryproxanthin-fl.
Astaxanthin vs placebo on arterial stiffness, oxidative stress and inflammation in renal transplant patients (Xanthin): a randomised controlled trial.
In fact, increased production of free radicals during muscle activity is results of oxidative phosphorylation in mitochondrial, synthesis of eicosanoid and by some enzymatic reactions (primarily xanthin oxidase) and these processes lead to oxidative modification of proteins, including the antioxidant enzymes, and at the same time reducing their protective care which results in pro-antioxidants imbalance.