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1

Effect of feed supplementation with alpha-ketoglutarate, combined with vitamin B6 or C, on the performance and haemoglobin and amino acid levels in growing rats

100%
Pierzynowski S. G., Filip R., Harrison A.
Bulletin of the Veterinary Institute in Puławy
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2007
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tom 51
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nr 2
The aim of the study was to evaluate the influence of α-ketoglutarate (AKG), at pH 2 or 5, combined with vitamin B₆ (AKG 2B, AKG 5B) or C (AKG 2C, AKG 5C), on the performance and haemoglobin and amino acid levels in growing rats. Eighty rats were divided into 5 treatment groups and stayed on trial for 9 d (n=16) or 18 d (n=10). No significant differences in average daily gain (ADG), average daily feed intake (ADFI), or feed efficiency were seen between the dextrose-treated control group and the AKG treated groups. The highest ADG and ADFI were seen in the AKG 2B rats. The AKG 2B and AKG 2C treated rats had the highest Hb levels. The Hb levels were positively correlated with a better performance. The free glutamine (Glu) increased over time in all the groups. The arginine (Arg) levels significantly increased in the AKG 2B and AKG 5B groups. An increase in free Glu had a positive impact on the growth performance.
2
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Potato genetically modified by 14-3-3 protein repression in growing rat diets. Part II: Health status of experimental animals

100%
Kosieradzka I., Sawosz E., Szopa J., Bielecki W.
Polish Journal of Food and Nutrition Sciences
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2008
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tom 58
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nr 3
For 4 weeks, male outbred IF2Jaz rats, divided into 4 groups (n=10), were administered ad libitum diets with 30% addition of dried tubers of transgenic potatoes with repression of isoform a, c as well as a and c of 14-3-3 protein (experimental groups) or with the addition of non-transgenic potatoes of Desiree cultivar (control group). The administration of transgenic potatoes did not affect the growth rate of model animals nor most of the analysed parameters of their health status. Neither anti-nutritional, nor immunostimulatory or toxic effects of the experimental diets were demonstrated. Yet, in liver tissue of rats fed a diet with transgenic potatoes J4 and G1 the concentration of 8-oxo-2’deoxyguanosine – a biomarker of oxidative damage to DNA – was higher than in animals administered a diet with non-transgenic potatoes. Results obtained in the study indicate a threat to the health status of animals fed diets with a high content of genetically-modified potatoes with repression of 14-3-3 protein.
3

Influence of the forms of alpha-ketoglutarate as feed additive on some blood indices and performance of growing rats

80%
Filip R. S., Pierzynowski S. G.
Medycyna Weterynaryjna
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2007
|
tom 63
|
nr 07
796-800
Alpha-ketoglutarate (AKG), a derivative of glutaminic acid and glutamate, was shown to increase muscle protein synthesis as well as to have a positive effect on the quality of bone strength. The aim of this study was to investigate the effects of AKG supplemented either as a salt (Ca + AKG) of pH 5 AKG 5, or in the pure form of pH 2 (AKG 2) on rats growth, performance, feed utilization, some blood parameters and histology of the small intestine. Sixty four rats were divided into 4 treatments and stayed on trial for 9 (n = 6) or 18 days (n = 10). The AKG 2 treated rats were observed to generally have the lowest average daily gain (ADG) with a high average daily food intake (ADFI). The only significant difference found was a reduced (P < 0.03) feed efficacy on day 9 of the AKG 2 treatment from that of the control group. All dietary treatments showed higher Hb levels than the controls on day 9, with those of dextrose and AKG 2 being significant (P < 0.03 and P < 0.005, respectively). The enterocyte crypt depth in the proximal small intestine of the AKG 2 treated rats was significantly enlarged in comparison to that of the dextrose group. From day 9 to day 18, the control as well as the dextrose and the AKG 2 treatments showed an increase in the free Gln levels, while the AKG 5 group showed a decrease in free Gln levels over time. In the AKG 2 group, the level of peptide bound (PB) Gln + Glu was higher than in controls.
4

Influence of folic acid, vitamin B2 and B6 supplementation on feed intake, body and organs weight, and liver fatty acids composition in rats subjected to severe protein deprivation

70%
Debski B., Bertrandt J., Klos A., Gralak M.
Polish Journal of Veterinary Sciences
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2006
|
tom 09
|
nr 3
Growing rats fed for 3 months a low-protein (LP) diet (4.5% of energy from protein), possessed about 29% lower body weight than animals consuming adequate-protein diet (20% energy from protein). The LP diet feeding caused an increase in daily feed intake followed by a decrease in feed conversion efficiency. The enrichment of LP diet with folic acid, vitamin B2 and B() (3 times above the level applied in the control diet) did not have any impact on rats BW and supplementation with these vitamins minimize the effect of LP diet on feed intake. The use of examined vitamins had a tendency to diminish an increase in feed conversion ratio caused by the LP nutrition. This effect was significant when all vitamins were added together. Rats fed the LP diet had higher relative weights of lungs, heart, liver and testis. Vitamins enriching the LP diet were observed to decrease a relative weight of lungs (folic acid, vitamin B6 and vitamin mixture), and liver (vitamin B6 and vitamin mixture). A tendency of increasing relative testis weight was also revealed in rats given the LP diet enriched with vitamins. The lower content of hepatic polyunsaturated fatty acids (FA) and a tendency for monoun- saturated FA content to be higher were found in rats fed the LP diet. The LP diet enrichment with folic acid caused that these changes were more pronounced and statistically significant. Enrichment of LP diet with vitamins tested may cause a partial reverse of changes observed in the hepatic FA composition.
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