Involvement of the Thyroid Gland in the Response of Young Chickens to Heat Stress

Bowen, S. J.; Washburn, K. W.; Huston, Till M.

doi:10.3382/ps.0630066

Cited by 39 publications

(23 citation statements)

References 13 publications

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“…These results could be due to the positive effects of vitamin E and vitamin A, alleviating the negative effects of heat stress. Several researchers reported reduced concentrations of T 3 and T 4 in heat-stressed chickens (Heninger et al, 1960;Johnson, 1981;Bowen et al, 1984). The inverse relationship between plasma concentration of T 3 and environmental temperature has also been wellknown (Hilman et al, 1985;May et al, 1986;Iqbal et al, 1990).…”

Section: Discussionmentioning

confidence: 96%

“…Plasma T 3 and T 4 , important growth promoters in animals, are associated with ambient temperature (McNabb and King, 1993). The circulating concentrations of T 3 and T 4 are reduced at high temperatures (Heninger et al, 1960;Bowen et al, 1984;Hilman et al, 1985). In addition, during heat stress the plasma corticosterone concentration increases (Edens and Siegel, 1975).…”

Section: Introductionmentioning

confidence: 99%

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Effects of vitamin E and vitamin A supplementation on performance, thyroid status and serum concentrations of some metabolites and minerals in broilers reared under heat stress (32 degrees C)

Şahin¹,

Şahin²,

Küçük³

2001

Vet. Med. - Czech

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An experiment on Cobb-500 male broilers was conducted to evaluate the effects of vitamin E (α-tocopherolacetate), vitamin A (retinol), and their combination on broiler performance and serum concentrations of triiodothyronine (T 3 ), thyroxine (T 4 ), adrenocorticotropine hormone (ACTH) and some metabolite and mineral concentrations in broilers reared under heat stress (32°C). One day-old 120 broilers were randomly assigned to 4 treatment groups, 3 replications of 10 birds each. The birds were fed either a control diet or a control diet supplemented with either vitamin A (15 000 IU retinol/kg diet), vitamin E (250 mg α-tocopherol-acetate/kg diet), or a combination of vitamin A and E (15 000 IU retinol plus 250 mg of α-tocopherolacetate/kg diet). Considered separately or as a combination, supplemental vitamin A and vitamin E increased feed intake (P = 0.01) and live weight gain (P = 0.03). However, feed efficiency remained similar in all treatments (P = 0.18). Serum T 3 and T 4 concentrations were also higher (P ≤ 0.001) with vitamin A, vitamin E, and vitamin A plus vitamin E groups than those of the control. However, ACTH concentration in serum was lower (P ≤ 0.001) in supplemental dietary vitamin groups compared with control. Serum glucose, uric acid, triglyceride, and cholesterol concentrations decreased (P ≤ 0.001) while protein and albumin concentrations increased (P ≤ 0.001) when both dietary vitamin E and vitamin A were supplemented. Serum activities of serum glutamic oxalate transaminase (SGOT) and serum glutamic pyruvate transaminase (SGPT) were not influenced by dietary vitamin E, vitamin A nor by a combination of vitamin A and vitamin E (P > 0.72). However, serum activity of alkaline phosphatase (AP) increased (P ≤ 0.001) with supplemental dietary vitamin E, vitamin A, or a combination of vitamin A and vitamin E. In addition, supplemental dietary vitamin E and vitamin A resulted in an increase in serum concentrations of both Ca and P (P ≤ 0.001). In general, when a significant effect was found for a parameter, the magnitude of responses to vitamin supplements was greatest with the combination of vitamin A and vitamin E, rather than that of each vitamin supplement separately. The results of the present study show that supplementing a combination of dietary vitamin E and vitamin A offers a good management practice to reduce heat stress-related decreases in broiler performance.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Effects of vitamin E and vitamin A supplementation on performance, thyroid status and serum concentrations of some metabolites and minerals in broilers reared under heat stress (32 degrees C)

Şahin¹,

Şahin²,

Küçük³

2001

Vet. Med. - Czech

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“…Plasma T3 and T4, important growth promoters in animals, are associated with ambient temperature [3]. The circulating concentrations of T3 and T4 are reduced at high temperatures [4,5]. In addition, plasma corticosterone concentration increases during heat stress [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of Vitamin C and Vitamin E on Lipid Peroxidation Status, Serum Hormone, Metabolite, and Mineral Concentrations of Japanese Quails Reared under Heat Stress (34º C)

Şahin¹,

Küçük²,

Şahin³

et al. 2002

International Journal for Vitamin and Nutrition Research

127

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This study was conducted to determine the effects of dietary vitamin C (L-ascorbic acid) and vitamin E (alpha-tocopherol acetate) on lipid peroxidation status measured as MDA and serum triiodothyronine (T3), thyroxine (T4), thyroid-stimulating hormone (TSH), adrenocorticotropic hormone (ACTH), as well as some other serum metabolite and mineral concentrations of Japanese quails reared under heat stress (34 degrees C). One hundred-eighty 10-day-old Japanese quails were randomly assigned to six treatment groups, three replicates of 10 birds each. Using a 2 x 3 factorial design, the birds received two levels of vitamin C (100 and 200 mg/kg of diet) or three levels of vitamin E (125, 250, or 500 mg/kg of diet). Greater dietary vitamin E and vitamin C resulted in a greater serum T3, T4, and TSH (p = 0.001), but lower ACTH (p = 0.001) concentrations. Serum concentrations of T4 and TSH increased to a greater extent by increasing dietary vitamin C when greater vitamin E levels were fed (interaction, p = 0.001). Serum glucose, urea, triglycerides, and cholesterol concentrations decreased (p = 0.001), while protein and albumin concentrations increased (p = 0.001) when both dietary vitamin C and vitamin E were increased. Serum activities of SGOT and SGPT were not influenced by dietary vitamin C and vitamin E (p > 0.43). However, serum activity of AP increased (p = 0.001) by increasing both dietary vitamin C and vitamin E. Increasing both dietary vitamin C and vitamin E caused an increase in serum concentrations of Ca, P, K (p = 0.001), Fe, and Zn (p = 0.01) but a decrease in serum concentrations of Na (p = 0.001) and Cu (p = 0.01). Interactions between vitamin C and vitamin E were detected for Ca, P, Na, and K (p = 0.001). Greater dietary vitamin C and vitamin E resulted in a greater serum and liver vitamin E, C, and A (p < or = 0.05), but lower MDA (p = 0.001) concentrations. Results of the present study conclude that supplementing a combination of dietary vitamin C (200 mg) and vitamin E (250-500 mg) offers a good management practice to reduce heat stress-related decreases in performance of Japanese quails.

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“…These results could have been caused by the positive effects of vitamin E and selenium, alleviating the negative effects of heat stress. Several researchers reported reduced concentrations of T 3 and T 4 in heat-stressed chickens [5,6,28,29]. The inverse relationship between plasma concentration of T 3 and environmental temperature has been also well known [7,30,31].…”

Section: Discussionmentioning

confidence: 99%

Effects of vitamin E and selenium on thyroid status, adrenocorticotropin hormone, and blood serum metabolite and mineral concentrations of Japanese quails reared under heat stress (34°C)

Gürsu

Şahin

Küçük

2003

J Trace Elements Exper Med

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This study was conducted to determine the effects of vitamin E and selenium (Se) on triiodothyronine (T 3 ), thyroxine (T 4 ), thyroid stimulating hormone (TSH), adrenocorticotropin hormone (ACTH), and serum glucose, urea, triglyceride, cholesterol, Ca, P, Na, and K concentrations of Japanese quails reared under heat stress (34°C). Onehundred twenty 10-day-old Japanese quails were randomly assigned to four treatment groups with three replicates of 10 birds each. The birds with a 2 · 2 factorial design received either two levels of vitamin E (125 and 250 mg/kg of diet) or two levels of selenium (0.1 and 0.2 mg/kg of diet). Greater dietary vitamin E and selenium inclusions resulted in a greater (P = 0.001) serum T 3 , T 4 , and TSH, but lower (P = 0.001) ACTH concentrations. No interactions between vitamin E and selenium were detected (P ‡ 0.11) for serum concentrations of T 3 , T 4 , TSH, and ACTH. Serum glucose, urea, triglyceride, and cholesterol concentrations decreased (P = 0.001), whereas protein concentrations increased (P = 0.001) when both dietary vitamin E and selenium increased. Serum albumin concentrations increased (P = 0.001) with greater dietary vitamin E but did not change with dietary selenium (P = 0.16). No interactions on any blood metabolites were detected (P ‡ 0.11). Serum activities of serum glutamic oxalate transaminase and serum glutamic pyruvate transaminase were not influenced by dietary vitamin E or selenium (P ‡ 0.42). However, serum activity of alkaline phosphatase increased (P = 0.001) with both increasing dietary vitamin E and selenium. There were no interactions detected for the serum enzyme activities (P ‡ 0.09). Increasing both dietary vitamin E and selenium caused an increase in serum concentrations of Ca, P, and K (P = 0.001), but a decrease in serum concentrations of Na (P = 0.001). No interactions were detected for serum mineral concentrations (P ‡ 0.07) except for P (P = 0.001). Results of the present study showed that dietary vitamin E and selenium have synergistic effects, and that supplementing a combination of dietary vitamin E (250 mg) and selenium (0.2 mg) positively influences some blood parameters that may positively influence the performance of Japanese quails under heat stress. J. Trace Elem. Exp. Med. 16:95-104, 2003.

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Involvement of the Thyroid Gland in the Response of Young Chickens to Heat Stress

Cited by 39 publications

References 13 publications

Effects of vitamin E and vitamin A supplementation on performance, thyroid status and serum concentrations of some metabolites and minerals in broilers reared under heat stress (32 degrees C)

Effects of vitamin E and vitamin A supplementation on performance, thyroid status and serum concentrations of some metabolites and minerals in broilers reared under heat stress (32 degrees C)

Effects of Vitamin C and Vitamin E on Lipid Peroxidation Status, Serum Hormone, Metabolite, and Mineral Concentrations of Japanese Quails Reared under Heat Stress (34º C)

Effects of vitamin E and selenium on thyroid status, adrenocorticotropin hormone, and blood serum metabolite and mineral concentrations of Japanese quails reared under heat stress (34°C)

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