Development of hypothalamic neuronal thermosensitivity in birds during the perinatal period

Tzschentke, B.; Basta, Dietmar

doi:10.1016/s0306-4565(99)00088-1

Cited by 32 publications

(19 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Until day 5 post-hatching, the hypothalamic neuronal thermosensitivity is characterized by a high cold sensitivity (up to 30%). Between days 5 and 10 post-hatching hypothalamic neuronal cold sensitivity decreases significantly from 30 to 14% while warm sensitivity increases from 5 to 14% (Tzschentke and Basta, 2000).…”

Section: Discussionmentioning

confidence: 92%

Effect of Short-Term Thermal Conditioning on Physiological and Behavioral Responses to Subsequent Acute Heat Exposure in Chicks

et al. 2014

View full text Add to dashboard Cite

It is known that thermal conditioning at an early age results in improved heat tolerance, and reduces mortality when re-exposed to heat in later life in chickens. However, the mechanism of thermal conditioning is not fully understood. The objective of this study was to investigate the effect of early thermal conditioning on physiological and behavioral responses in acute heat-exposed chicks. Six-day-old chicks (White Plymouth Rock) were exposed to high temperature at 40℃ for 3 h while control chicks were kept at 30℃. Four days after treatment, both groups were challenged to high temperature at 40℃ for 15 min. We found that the initiation times for behavioral responses (panting and wing-droop posture) in experienced chicks were later than those in control. At the end of heat-exposure treatment, the rectal temperature in experienced chicks was lower than that in control while there was no difference in respiration rate between the groups. Compared with control, experienced chicks had a lower level of plasma corticosterone. Gene expression levels of brain-derived neurotrophic factor, thyrotropin-releasing hormone, interleukin-6 and lipopolysaccharide-induced tumor necrosis factor were significantly lower in the brain of experienced chicks than in the control chicks. These results suggest that thermal conditioning may change response to subsequent heat exposure by altering the central thermoregulation system, resulting in an alleviation of heat stress.

show abstract

Section: Discussionmentioning

confidence: 92%

Effect of Short-Term Thermal Conditioning on Physiological and Behavioral Responses to Subsequent Acute Heat Exposure in Chicks

et al. 2014

View full text Add to dashboard Cite

show abstract

“…In our previous electrophysiological investigations [2,6,[33][34][35][36] we found long-lasting changes in hypothalamic neuronal activity after prenatal temperature experiences. These long-lasting reorganizations in the neuronal network controlling body temperature, induced by prenatal warm or cold incubation but also under normal incubation conditions, occur stepwise during different developmental periods.…”

Section: Discussionmentioning

confidence: 82%

“…In normal incubated birds a stepwise development of the neuronal hypothalamic thermosensitivity occurs during the early post hatching ontogeny. In Muscovy duck embryos as well as during the first days of post hatching in Muscovy ducklings and chickens the neuronal hypothalamic thermosensitivity is characterized by a high cold-sensitivity [33,36]. Around day 10 in Muscovy ducklings [33] and day 30 in chickens [36], respectively, the neuronal hypothalamic thermosensitivity is changing from the juvenile into the adult type, which is in birds as well as mammals characterized by a higher warm sensitivity [37].…”

Section: Discussionmentioning

confidence: 99%

“…In Muscovy duck embryos as well as during the first days of post hatching in Muscovy ducklings and chickens the neuronal hypothalamic thermosensitivity is characterized by a high cold-sensitivity [33,36]. Around day 10 in Muscovy ducklings [33] and day 30 in chickens [36], respectively, the neuronal hypothalamic thermosensitivity is changing from the juvenile into the adult type, which is in birds as well as mammals characterized by a higher warm sensitivity [37]. In Muscovy ducks prenatal warm or cold load during the last days of incubation altered the neuronal hypothalamic thermosensitivity at the last day of incubation already [34].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Long-Lasting Effect of Changes in Incubation Temperature on Heat Stress Induced Neuronal Hypothalamic c-Fos Expression in Chickens

Janke¹,

Tzschentke²

2010

TOOENIJ

View full text Add to dashboard Cite

Abstract:In birds, during prenatal 'critical periods' the thermoregulatory system can be life-long imprinted by the actual incubation temperature. The aim of the present study is to elucidate long-term effects of prenatal temperature experiences, applied at the end of incubation, on central thermoregulatory mechanisms by detection of neuronal hypothalamic c-Fos expression as a consequence of acute heat stress in growing and adult chickens using immunohistochemistry. From day 18 of incubation chicken embryos were incubated in three temperature groups: 37.5°C (regular incubated), 34.5°C (cold incubated) or 38.5°C (warm incubated). C-Fos expression was detected in 29 4-weeks old and 61 8-weeks old chickens after acute heat stress (42°C for 90 min). The results show, that prenatal temperature experiences can induce long-lasting changes in the heat induced neuronal hypothalamic c-Fos expression. But significant alterations could be only found in 8 weeks old chickens and these changes were in opposite as expected. It means that after acute heat stress cold incubated chickens have a significantly lower neuronal c-Fos expression compared with the warm incubated ones. This effect could be caused by cross adaptation to the actual ambient temperature during the growing period. Further, the developmental pattern of the hypothalamic neuronal network in different incubated birds, which is demonstrated by neuronal c-Fos expression in the actual study, is similar to the pattern, which we found after recordings of single neurons activity, to a higher extent. Correlations between both parameters, which are involved in neuronal plasticity, can be accepted.

show abstract

“…Future work also could usefully address the neuromuscular mechanisms underlying embryonic thermoregulation. For example, the ability of bird embryos to exhibit hypothalamic neuronal thermosensitivity (Tzschentke and Basta 2000;Tzschentke et al 2004) may play an important role in embryonic thermoregulation.…”

Section: Discussionmentioning

confidence: 99%

Thermoregulatory Behavior Is Widespread in the Embryos of Reptiles and Birds

Zhou

et al. 2014

The American Naturalist

View full text Add to dashboard Cite

Recent studies have demonstrated that thermoregulatory behavior occurs not only in posthatching turtles but also in turtles prior to hatching. Does thermoregulatory behavior also occur in the embryos of other reptile and bird species? Our experiments show that such behavior is widespread but not universal in reptile and bird embryos. We recorded repositioning within the egg, in response to thermal gradients, in the embryos of three species of snakes (Xenochrophis piscator, Elaphe bimaculata, and Zaocys dhumnades), two turtles (Chelydra serpentina and Ocadia sinensis), one crocodile (Alligator sinensis), and four birds (Coturnix coturnix, Gallus gallus domesticus, Columba livia domestica, and Anas platyrhynchos domestica). However, we detected no significant thermoregulation by the embryos of two lizard species (Takydromus septentrionalis and Phrynocephalus frontalis). Overall, embryonic thermoregulatory behavior is widespread in reptile as well as bird species but may be unimportant in the small eggs laid by most lizards.

show abstract

Development of hypothalamic neuronal thermosensitivity in birds during the perinatal period

Cited by 32 publications

References 10 publications

Effect of Short-Term Thermal Conditioning on Physiological and Behavioral Responses to Subsequent Acute Heat Exposure in Chicks

Effect of Short-Term Thermal Conditioning on Physiological and Behavioral Responses to Subsequent Acute Heat Exposure in Chicks

Long-Lasting Effect of Changes in Incubation Temperature on Heat Stress Induced Neuronal Hypothalamic c-Fos Expression in Chickens

Thermoregulatory Behavior Is Widespread in the Embryos of Reptiles and Birds

Contact Info

Product

Resources

About