Thermoresponsiveness of the Preoptic Region of the Brain in House Sparrows

Mills, Steven H.; Heath, James E.

doi:10.1126/science.168.3934.1008

Cited by 16 publications

(3 citation statements)

References 12 publications

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“…However, if HSF2 is involved in the regulation of proteostasis capacity, it could be activated at least during mild heat shock at physiological temperatures. The body temperature in avians is around 41°C (Mills and Heath, 1970; Aschoff et al , 1973), but it is <38°C in mammals, including humans (Mackowiak, 1998). Therefore chicken DT40 cells and mouse fibroblasts maintained at 37°C were treated with mild heat shock at 41 and 40°C, respectively.…”

Section: Resultsmentioning

confidence: 99%

Heat shock factor 2 is required for maintaining proteostasis against febrile-range thermal stress and polyglutamine aggregation

Shinkawa

Tan

Fujimoto

et al. 2011

MBoC

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Section: Resultsmentioning

confidence: 99%

Heat shock factor 2 is required for maintaining proteostasis against febrile-range thermal stress and polyglutamine aggregation

Shinkawa

Tan

Fujimoto

et al. 2011

MBoC

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“…In birds, as in mammals, brain temperature is generally considered to be of particular significance in thermoregulation (see Saalfeld, 1936;Mills & Heath, 1970), and the stability of brain temperature is presumably of importance for many other functions controlled by the central nervous C. ASCHOFF AND OTHERS system. While small artificial changes of hypothalamic temperature can result in large changes in either heat production or heat loss, larger spontaneous fluctuations in brain temperature seem to have comparatively little influence on the same two thermoregulatory effector systems.…”

Section: Introductionmentioning

confidence: 99%

Circadian rhythms of chicken brain temperatures

Aschoff¹,

Aschoff²,

Paul³

1973

The Journal of Physiology

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SUMMARY1. Brain temperature was recorded continuously for up to 18 days in unanaesthetized adult male chickens. With the use of a guide box of plexiglas screwed into a trephine of the calvarium, several thermocouples could be inserted at various depths into the brain at the same time.2. While brain temperatures were being recorded, each chicken was placed in a small circular arena and kept either in a light-dark cycle (LD 12:12 hr) or in conditions of constant dim illumination (LL) within a soundproof chamber.3. Under LD-conditions, the range of oscillation (the difference between maximum and minimum within one period) in brain temperature at any one site was about 1.50 C. During the 12 hr of light the temperature often reached a plateau for several hours. During darkness, a minimum of temperature was usually reached shortly after light-off. Brain temperature started to rise several hours before light-on.4. All eleven chickens tested under LL-conditions showed free running circadian rhythms of brain temperature, with mean periods varying between 22-75 and 25-00 hr (overall mean: 23-69 hr). The range of oscillation in LL-conditions was smaller than in LD-conditions, but was seldom less than 1.00 C.5. In LD as well as in LL, continuous fluctuations of temperature with a much higher frequency were superimposed on the circadian cycle. The fluctuations occurred synchronously at all sites of the brain and were of the same order of magnitude (frequency and range) during wakefulness as during sleep.

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“…In addition to maintaining the endogenous time-keeping apparatus, the neuroendocrine mechanism apparently adjusts the temperature cycle in response to changes in the light regime. Attempting to locate the site of thermoregulation within the house sparrow, Mills and Heath (1970) demonstrated that the hypothalamic region of the brain was thermosensitive. Regulation of sparrow body temperature was accomplished through localized temperature changes induced within the hypothalamus by thermode implants.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Photoperiod on the Deep Body Temperature of Domestic Turkeys and Its Relationship to the Diurnal Periodicity of Leucocytozoon smithi Gametocytes in the Peripheral Blood of Turkeys

Gore

Noblet

1978

Poultry Science

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Eighteen turkeys naturally infected with Leucocytozoon smithi were separated into 3 groups of 6 each and were respectively exposed to conditions of natural, reversed, or continuous light. Turkey deep body temperature and peripheral gametocyte numbers of L. smithi in all three groups were determined every 2 hr over a 36-hr period. The peak period of both turkey body temperature and gametocyte numbers coincided with the midpoint of the light period for turkeys exposed to natural and reversed light conditions. The body temperature of turkeys exposed to continuous light remained relatively constant while L. smithi gametocytes exhibited asynchronous behavior.

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Thermoresponsiveness of the Preoptic Region of the Brain in House Sparrows

Cited by 16 publications

References 12 publications

Heat shock factor 2 is required for maintaining proteostasis against febrile-range thermal stress and polyglutamine aggregation

Heat shock factor 2 is required for maintaining proteostasis against febrile-range thermal stress and polyglutamine aggregation

Circadian rhythms of chicken brain temperatures

The Effect of Photoperiod on the Deep Body Temperature of Domestic Turkeys and Its Relationship to the Diurnal Periodicity of Leucocytozoon smithi Gametocytes in the Peripheral Blood of Turkeys

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