Oxalate synthesis from hydroxypyruvate in vitamin-B6-deficient rats.

Oxalate synthesis from hydroxypyruvate in vitamin-B6-deficient rats. Research Abstract Details 

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Oxalate synthesis from hydroxypyruvate in vitamin-B6-deficient rats. Abstract Text:

Yaovalak Teerajetgul,Rayhan Zubair Hossain,Kenichi Yamakawa,Makoto Morozumi,Kimio Sugaya,Yoshihide Ogawa,Yaovalak Teerajetgul,Rayhan Zubair Hossain,Kenichi Yamakawa,Makoto Morozumi,Kimio Sugaya,Yoshihide Ogawa,

We studied the effects of an intravenous hydroxypyruvate load on endogenous oxalogenesis in rats receiving a standard diet or a vitamin-B6-deficient diet. Twelve male Wistar rats were randomized to two groups and were fed either a standard diet or a vitamin-B6-deficient diet for 3 weeks. Then the animals received an intravenous infusion of 100 mg/ml (960.6 micromol/ml) of hydroxypyruvate slowly over 10 min. Urine samples were collected just before hydroxypyruvate infusion and at hourly intervals until 5 h afterward. Urinary oxalate, glycolate, and citrate levels were measured by capillary electrophoresis. Hourly urinary oxalate excretion peaked within 2 h, while urinary glycolate excretion peaked at 1 h, after the hydroxypyruvate load in both control and vitamin-B6-deficient rats. Both urinary oxalate and glycolate excretion were higher in vitamin-B6-deficient rats than in control rats. Infusion of hydroxypyruvate increased the 5-h urinary oxalate and glycolate excretion to 0.68% (6.56 micromol) and 0.53% (5.10 micromol) of the administered dose (mol/mol), respectively, in the control rats, while oxalate and glycolate excretion, respectively, increased to 2.43% (23.36 micromol) and 0.79% (7.59 micromol) of the dose in the vitamin-B6-deficient rats. Urinary citrate excretion was significantly lower at baseline and all other times in the vitamin-B6-deficient rats than in the control rats. In conclusion, a hydroxypyruvate load increased endogenous oxalate synthesis in control rats, and its synthesis was even greater in vitamin-B6-deficient rats. Vitamin B6 deficiency also resulted in significant hypocitraturia.

Oxalate synthesis from hydroxypyruvate in vitamin-B6-deficient rats. Publishing Authors By Initials

Y Teerajetgul,RZ Hossain,K Yamakawa,M Morozumi,K Sugaya,Y Ogawa,Y Teerajetgul,RZ Hossain,K Yamakawa,M Morozumi,K Sugaya,Y Ogawa,

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Oxalate synthesis from hydroxypyruvate in vitamin-B6-deficient rats. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Urological research

VOLUME: 35

Page Numbers: 173-8

Journal Abbreviation: Urol. Res.

ISSN: 0300-5623

DAY: 13

MONTH: 06

YEAR: 2007

Oxalate synthesis from hydroxypyruvate in vitamin-B6-deficient rats. Information

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LANGUAGE: eng

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AFFILIATION: Division of Urology, Department of Organ-oriented Medicine, Faculty of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa 903-0215, Japan.

Country: Germany

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MEDLINETA: Urol Res

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