Effect of low ambient temperature on protein turnover and heat production in chicks

Chronic Heat Exposure Alters Protein Turnover of Three Different Skeletal Muscles in Finishing Broiler Chickens Fed 20 or 25% Protein Diets

“…These declines in both protein synthesis and breakdown are consistent with earlier studies performed on younger birds (Aoyagi et al 1988, Hayashi et al 1992, Yunianto et al 1997.…”

Chronic Heat Exposure Alters Protein Turnover of Three Different Skeletal Muscles in Finishing Broiler Chickens Fed 20 or 25% Protein Diets

“…These declines in both protein synthesis and breakdown are consistent with earlier studies performed on younger birds (Aoyagi et al 1988, Hayashi et al 1992, Yunianto et al 1997.…”

Enhancement of Myofibrillar Proteolysis Following Infusion of Amino Acid Mixture Correlates Positively with Elevation of Core Body Temperature in Rats

“…Anesthetics generally induce a decrease in Tb, as seen in anesthetized rats in the present study, and Tb of anesthetized rats should be above the thermoregulatory threshold for thermogenesis (9). Thermogenic responses against Tb decline might therefore not have been evoked, which would be different from the abovementioned thermoregulatory response (increased protein turnover) to cold under the conscious condition (28). This is supported by the finding that urinary MeHis excretion after cardiac surgery did not differ between patients randomized to intraoperative blood temperatures of 28 or 20˚C (29).…”

“…Increases in metabolic heat production by elevated protein turnover would be attributable to either incorporation of ingested or degraded AA into protein or their direct oxidation, as both reactions are accompanied by increases in energy expenditure (10). For example, it is known that in ad lib.-fed chicks exposed to 22˚C, whole body protein synthesis and degradation were increased compared with those exposed to 30˚C (28), possibly leading to the prevention of Tb declines. Therefore, one might predict that increased rates of protein turnover after AA or protein ingestion would contribute to elevated thermogenesis.…”

The effect of a cold environment on protein and energy metabolism in calves

“…Relatively few studies have examined the effect of environmental temperature on the rate of protein turnover, particularly in domestic species. Aoyagi et al (1988) found that in ad lib.-fed chicks exposed to 22" whole-body protein synthesis and degradation were increased compared with those exposed to 30". Lindsay et al (1988) showed that tyrosine catabolic rate was elevated in young restricted-fed pigs acclimated to 10" compared with others exposed to 35", although environment did not influence rates of whole-body or muscle protein synthesis.…”

“…A lack of response in liver protein synthesis to cold-adaptation in calves is supported by similar results in chicks fed ad lib. at 22" compared with 30" (Aoyagi et al 1988) and in rats fed ad lib. at 5" compared with 25" (McAllister, 1987).…”

Chronic Heat Exposure Alters Protein Turnover of Three Different Skeletal Muscles in Finishing Broiler Chickens Fed 20 or 25% Protein Diets

“…These declines in both protein synthesis and breakdown are consistent with earlier studies performed on younger birds (Aoyagi et al 1988, Hayashi et al 1992, Yunianto et al 1997.…”

Enhancement of Myofibrillar Proteolysis Following Infusion of Amino Acid Mixture Correlates Positively with Elevation of Core Body Temperature in Rats

“…Anesthetics generally induce a decrease in Tb, as seen in anesthetized rats in the present study, and Tb of anesthetized rats should be above the thermoregulatory threshold for thermogenesis (9). Thermogenic responses against Tb decline might therefore not have been evoked, which would be different from the abovementioned thermoregulatory response (increased protein turnover) to cold under the conscious condition (28). This is supported by the finding that urinary MeHis excretion after cardiac surgery did not differ between patients randomized to intraoperative blood temperatures of 28 or 20˚C (29).…”

“…Increases in metabolic heat production by elevated protein turnover would be attributable to either incorporation of ingested or degraded AA into protein or their direct oxidation, as both reactions are accompanied by increases in energy expenditure (10). For example, it is known that in ad lib.-fed chicks exposed to 22˚C, whole body protein synthesis and degradation were increased compared with those exposed to 30˚C (28), possibly leading to the prevention of Tb declines. Therefore, one might predict that increased rates of protein turnover after AA or protein ingestion would contribute to elevated thermogenesis.…”

The effect of a cold environment on protein and energy metabolism in calves

“…Relatively few studies have examined the effect of environmental temperature on the rate of protein turnover, particularly in domestic species. Aoyagi et al (1988) found that in ad lib.-fed chicks exposed to 22" whole-body protein synthesis and degradation were increased compared with those exposed to 30". Lindsay et al (1988) showed that tyrosine catabolic rate was elevated in young restricted-fed pigs acclimated to 10" compared with others exposed to 35", although environment did not influence rates of whole-body or muscle protein synthesis.…”

“…A lack of response in liver protein synthesis to cold-adaptation in calves is supported by similar results in chicks fed ad lib. at 22" compared with 30" (Aoyagi et al 1988) and in rats fed ad lib. at 5" compared with 25" (McAllister, 1987).…”

Chronic Heat Exposure Alters Protein Turnover of Three Different Skeletal Muscles in Finishing Broiler Chickens Fed 20 or 25% Protein Diets

“…These declines in both protein synthesis and breakdown are consistent with earlier studies performed on younger birds (Aoyagi et al 1988, Hayashi et al 1992, Yunianto et al 1997.…”

Enhancement of Myofibrillar Proteolysis Following Infusion of Amino Acid Mixture Correlates Positively with Elevation of Core Body Temperature in Rats

“…Anesthetics generally induce a decrease in Tb, as seen in anesthetized rats in the present study, and Tb of anesthetized rats should be above the thermoregulatory threshold for thermogenesis (9). Thermogenic responses against Tb decline might therefore not have been evoked, which would be different from the abovementioned thermoregulatory response (increased protein turnover) to cold under the conscious condition (28). This is supported by the finding that urinary MeHis excretion after cardiac surgery did not differ between patients randomized to intraoperative blood temperatures of 28 or 20˚C (29).…”

“…Increases in metabolic heat production by elevated protein turnover would be attributable to either incorporation of ingested or degraded AA into protein or their direct oxidation, as both reactions are accompanied by increases in energy expenditure (10). For example, it is known that in ad lib.-fed chicks exposed to 22˚C, whole body protein synthesis and degradation were increased compared with those exposed to 30˚C (28), possibly leading to the prevention of Tb declines. Therefore, one might predict that increased rates of protein turnover after AA or protein ingestion would contribute to elevated thermogenesis.…”

The effect of a cold environment on protein and energy metabolism in calves

“…Relatively few studies have examined the effect of environmental temperature on the rate of protein turnover, particularly in domestic species. Aoyagi et al (1988) found that in ad lib.-fed chicks exposed to 22" whole-body protein synthesis and degradation were increased compared with those exposed to 30". Lindsay et al (1988) showed that tyrosine catabolic rate was elevated in young restricted-fed pigs acclimated to 10" compared with others exposed to 35", although environment did not influence rates of whole-body or muscle protein synthesis.…”

“…A lack of response in liver protein synthesis to cold-adaptation in calves is supported by similar results in chicks fed ad lib. at 22" compared with 30" (Aoyagi et al 1988) and in rats fed ad lib. at 5" compared with 25" (McAllister, 1987).…”