Response of urinary purine derivatives excretion to yeast RNA infusion levels in the yak abomasum

Abstract

Abstract: Three castrated yaks fitted with T-shaped abomasum cannulae were used to study the recovery rate of urinary purine derivative after abomasum infusion with incremental amounts of purine bases. As the infusion RNA levels increased, excretion of urinary allantoin (564-1 426 μmol/kg BW^0.75), total purine derivative (629-1 507 μmol/kg BW^0.75) and the ratio of allantoin to total purine derivative (0.90-0.95) increased linearly (P<0.01), although excretion of uric acid, creatinine and nitrogen were not significantly (P>0.05) affected by infusion levels. The relationship between daily urinary purine derivative excretion (Y, mmol/d) and exogenous purine supply via abomasums infusion (X, mmol/d) was Y=0.85X+33.02 (R²=0.96), suggesting that 85% of the supplied exogenous purine was excreted in the urine of the yaks.

CLC Number:

S823.8⁺5

WANG Hu-cheng, YE De-he, ZHOU Jian-wei, LONG Rui-jun. Response of urinary purine derivatives excretion to yeast RNA infusion levels in the yak abomasum[J]. Acta Prataculturae Sinica, 2012, 21(1): 248-253.

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