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אסיף מאגר המחקר החקלאי
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Induction of thermotolerance in chickens by temperature conditioning: Heat shock protein expression
Year:
1997
Authors :
Friedman-Einat, Miriam
;
.
Haberfeld, Alon
;
.
Horev, Guy
;
.
Hurvitz, Shmuel (Animal science)
;
.
Shamay, Avi
;
.
Yahav, Shlomo
;
.
Volume :
813
Co-Authors:
Yahav, S., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Shamai, A., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Haberfeld, A., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Horev, G., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Hurwitz, S., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Einat, M., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
628
To page:
636
(
Total pages:
9
)
Abstract:
Broiler chicks were conditioned by exposure to heat stress early in life to elucidate physiological mechanisms and possible involvement of the known heat shock proteins (HSPs) in the induction of thermotolerance. Chicks were exposed to 36 ± 1°C; 70-80% relative humidity (rh) for 24 hours at the age of 5 days. During conditioning, weight gain was depressed. Due to accelerated growth during the postconditioning period, a complete compensation for lost weight gain was achieved by the conditioned group. At the age of 42 days, challenge with acute heat stress of 35 ± 1°C; 25-30% rh resulted in a large increase in cloacal temperature of the control chickens and by a more moderate increase in the conditioned chickens. Mortality during the thermal challenge was significantly higher in the control chickens than in the conditioned ones. Conditioning at an early age resulted in reduced plasma triiodothyronine (T3) concentration and hemodynamic changes (significant decrease in heart weight and hematocrit). The synthesis rate of 70 and 90 kDa HSPs during the first hour of heat challenge, accelerated gradually in control chickens, whereas in the conditioned chickens it accelerated only after 3 hours and in a more moderate response. These results suggest that HSP's response does not play a major role in the conditioning-induced mechanism leading to acquisition of thermotolerance in chickens.
Note:
Related Files :
animal experiment
Animalia
chicken
Conference paper
Gallus gallus
heat stress
heat tolerance
Male
nonhuman
Show More
Related Content
More details
DOI :
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
Conference paper
;
.
Language:
English
Editors' remarks:
ID:
24642
Last updated date:
21/08/2022 07:45
Creation date:
17/04/2018 00:09
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Scientific Publication
Induction of thermotolerance in chickens by temperature conditioning: Heat shock protein expression
813
Yahav, S., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Shamai, A., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Haberfeld, A., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Horev, G., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Hurwitz, S., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Einat, M., Institute of Animal Science, Agricultrual Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Induction of thermotolerance in chickens by temperature conditioning: Heat shock protein expression
Broiler chicks were conditioned by exposure to heat stress early in life to elucidate physiological mechanisms and possible involvement of the known heat shock proteins (HSPs) in the induction of thermotolerance. Chicks were exposed to 36 ± 1°C; 70-80% relative humidity (rh) for 24 hours at the age of 5 days. During conditioning, weight gain was depressed. Due to accelerated growth during the postconditioning period, a complete compensation for lost weight gain was achieved by the conditioned group. At the age of 42 days, challenge with acute heat stress of 35 ± 1°C; 25-30% rh resulted in a large increase in cloacal temperature of the control chickens and by a more moderate increase in the conditioned chickens. Mortality during the thermal challenge was significantly higher in the control chickens than in the conditioned ones. Conditioning at an early age resulted in reduced plasma triiodothyronine (T3) concentration and hemodynamic changes (significant decrease in heart weight and hematocrit). The synthesis rate of 70 and 90 kDa HSPs during the first hour of heat challenge, accelerated gradually in control chickens, whereas in the conditioned chickens it accelerated only after 3 hours and in a more moderate response. These results suggest that HSP's response does not play a major role in the conditioning-induced mechanism leading to acquisition of thermotolerance in chickens.
Scientific Publication
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