Abstract
Rats reared at 30°C do not exhibit the same thermoregulatory competence during cold exposure as do rats reared at 20° C. They are even more clearly distinguished by the absence of an hypothermic response to intrahypothalamic noradrenaline (IH-NA). In one series of experiments, different groups of rats all received 120 days 30° C-exposure and 20 days 20° C-exposure. The 20° C-exposure occurred at different ages in different treatment groups. At 140 days of age, bilateral IH-NA injections (each 10 μg/1 μl CSF) were administered in conscious rats and the body temperature response observed. An hypothermic response to IH-NA was observed in groups whose exposure to 20° C terminated between 20 and 80 days of age. In a second series of experiments, duration of rearing at 20° C varied but always started at 40 days of age. Responses to IH-NA in 140-day-old adults indicated that the exposure required to induce 50% of the hypothermic response of control (20° C-reared) rats was ∼ 17days. These data suggest that there is an hypothalamic noradrenergic mechanism implicated in the control of body temperature whose development is affected by environmental temperature in a duration-dependent manner. The period during which this effect may be exerted extends into adulthood.
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References
Avery DD (1971) Intrahypothalamic adrenergic and cholinergic injection effects on temperature and ingestive behaviour in the rat. Neuropharmacology 10:753–763
Barnard T, Skala J, Lindberg O (1970) Changes in interscapular brown adipose tissue of the rat during perinatal and early postnatal development. Comp Biochem Physiol 33:499–508
Barnett SA (1960) An adaptive change in an inbred mouse strain maintained in a cold environment. Nature 188:500
Barnett SA (1965) Adaptation of mice to cold. Biol Rev 40:5–51
Bartůňková R, Janský L, Mejsnar J (1971) Non-shivering thermogenesis and cold adaptation. In: Janský L (ed) Nonshivering thermogenesis: proceedings of the first international symposium. Swet and Zeitlinger, Lisse, p 39
Beckman AL (1970) Effect of intrahypothalamic norepinephrine on thermoregulatory responses in the rat. Am J Physiol 218:1596–1604
Blatteis CM (1975) Postnatal development of pyrogenic sensitivity in guinea pigs. J Appl Physiol 39:251–257
Brück K, Hinckel P (1984) Thermal afferents to the hypothalamus and thermal adaptation. J Therm Biol 9:7–10
Cooper KE, Ferguson AV, Veale WL (1980) Modification of thermoregulatory responses in rabbits reared at elevated environmental temperatures. J Physiol (Lond) 303:165–172
Corklin P, Heggerness F (1971) Maturation of temperature homeostasis in the rat. Am J Physiol 220:333–336
Cranston WI, Hellon RF, Luff RH, Rawlins MD (1972) Hypothalamic endogenous noradrenaline and thermoregulation in the cat and rabbit. J Physiol (Lond) 223:59–67
Dawson NJ, Hellon RF, Herington JG, Young AA (1982) Facial thermal input in the caudal trigeminal nucleus of rats reared at 30° C. J Physiol (Lond) 333:545–554
Doi K, Kuroshima A (1979) Lasting effect of infantile cold experience on cold tolerance in adult rats. Jpn J Physiol 29:139–150
Farris EJ, Griffith JQ (1967) The rat in laboratory investigation 2nd edition. Hafner, New York
Feldberg W, Myers RD (1965) Changes in temperature produced by microinjections of amines into the anterior hypothalamus of cats. J Physiol (Lond) 177:239–245
Ferguson AV, Veale WL, Cooper KE (1981) Evidence of environmental influence on the development of thermoregulation in the rat. Can J Physiol Pharmacol 59:91–95
Fisher RS, Almli CR (1984) Postnatal development of sensory influences on lateral hypothalamic neurons in the rat. Brain Res 314:55–75
Fisher RS, Almli CR (1975) Postnatal development of sensory influences on neurons in the ventromedial hypothalamic nucleus in the rat. Brain Res 350:13–26
Fowler SJ, Kellog C (1975) Ontogeny of thermoregulatory mechanisms in the rat. J Comp Physiol Psychol 89:738–746
Gottlieb G (1976) Studies on the development of behaviour and the nervous system. In: Gottlieb G (ed) Neural and behavioural specificity, vol 3. Academic Press, New York
Hafez ESE (1968) Adaptation of domestic animals, Lea and Febiger, Philadelphia, PA
Hahn P (1956) Effect of environmental temperatures on the development of thermoregulatory mechanisms in young rats. Nature 178:96–97
Hellon RF (1975) Monoamines, pyrogens and cations: their actions on central control of body temperature. Pharmacol Rev 26(4):289–321
Hori T, Shinohara K (1979) Hypothalamic thermoresponsive neurones in the newborn rat. J Physiol (Lond) 294:541–560
Hubel DH, Wiesel TN (1970) The period of susceptibility to the physiological effects of unilateral eye closure in kittens. J Physiol (Lond) 206:419–436
Kasting NW, Veale WL, Cooper KE (1979) Development of fever in the newborn lamb. Am J Physiol 236:R184-R187
Křeček J, Křečková J, Martínek (1957) The development of thermoregulation: V. Effect of rearing under cold and warm conditions on the development of thermoregulation in young rats. Physiol Bohemoslov 6:329–336
Metcalf G, Myers RD (1978) Precise location with the preoptic area where noradrenaline produces hypothermia. Eur J Pharmacol 51:47–53
Moriya K, Yahata T, Kuroshima A (1985) Lasting consistency of cold adaptability in rats reared in cold for many generations. Jpn Physiol 35:423–442
Myers RD, Yaksh TL (1969) Control of body temperature by the unanaesthetized monkey by cholinergic and aminergic systems in the hypothalamus. J Physiol (Lond) 202:483–500
Pellegrino LJ, Pellegrino AS, Cushman AJ (1979) A Stereotaxic Atlas of the rat brain, 2nd edn, Plenum, New York
Poole S, Stephenson JD (1979) Effects of noradrenaline and carbachol on temperature regulation of rats. Br J Pharmacol 65:43–51
Rudy TA, Wolf HH (1971) The effect of intrahypothalamically injected sympathomimetic amines on temperature regulation in the cat. J Pharmacol Exp Ther 179:218–235
Taylor PM (1960) Oxygen consumption in newborn rats. J Physiol (Lond) 154:153–168
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Young, A.A., Dawson, N.J. Effects of environmental temperature on the development of a noradrenergic thermoregulatory mechanism in the rat. Pflugers Arch. 412, 141–146 (1988). https://doi.org/10.1007/BF00583743
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DOI: https://doi.org/10.1007/BF00583743