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The effect of short term starvation on galanin, leptin, thyroid hormones, insulin, prolactin, growth hormone, ghrelin and factors involved in energy metabolism in adult goats

Neda Eskandarzadeh1, Medi Saeb1, Saeed Nazifi2*, Saeedeh Saeb3 and Maryam Ansari-Lari4

1Department of Biochemistry, School of Veterinary Medicine, Shiraz University, Shiraz, Iran, P.O. Box, 71345-1731; 2Department of Clinical Studies, School of Veterinary Medicine, Shiraz University, Shiraz, Iran, P.O. Box, 71345-1731; 3Clinical Biochemistry, College of Medical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran; 4Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, P.O. Box, 71345-1731, Iran

 
Abstract

The present study was conducted to assess the effect of short term starvation on galanin, leptin, thyroid hormones, insulin, prolactin, growth hormone, ghrelin and factors involved in energy metabolism including high-density lipoprotein (HDL), cholesterol, β-hydroxybutyrate, glucose, non-esterified fatty acids (NEFA), triglyceride (TG) and very-low-density lipoprotein (VLDL) concentrations in adult goats. Eight non-lactating non-pregnant goats aged 4-5 years and body condition score (BCS) 3 were randomly assigned to control and test groups. The animals were trained to eat their daily forage ration during a period of 10 days. The experimental procedure was applied for 3 days during which control group received 120% of maintenance energy, while the test group was supplied with 60% of maintenance energy. Blood samples were collected on days 8 and 10 and at 2, 12, 24, 36 and 72 hours after beginning of starvation. Blood parameters were measured according to standard procedures. No significant differences were observed in the concentrations of cholesterol, fT3, fT4, glucose, growth hormone, leptin, VLDL-cholesterol, non-esterified fatty acids (NEFA), triglyceride (TG) and prolactin between control and test groups. A significant difference was found in β-hydroxybutyrate concentration between fed and fasted goats at 36th hour of starvation. Moreover, there was a significant difference in the concentration of HDL-cholesterol between control and test groups at 72nd hour (P<0.05). Gradual starvation had no effect on hormonal and neuropeptides concentrations probably.

Keywords: Short term starvation; hormones; biochemical parameters; energy metabolism; goat
 
To cite this article: Eskandarzadeh, N, M Saeb, S Nazifi, S Saeb and M Ansari-Lari, 2014. The effect of short term starvation on galanin, leptin, thyroid hormones, insulin, prolactin, growth hormone, ghrelin and factors involved in energy metabolism in adult goats. Res. Opin. Anim. Vet. Sci., 4(5): 258-263.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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