Effect of training on eosinophil response of exercised rats

Keeney, Clifford E.

doi:10.1152/jappl.1960.15.6.1046

Cited by 7 publications

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“…The eosinophil drop has been used to evaluate the degree of adrenocortical activity in response to noise (Anthony and Ackermann, 1955), muscular exercise and training (Keeney, 1960), adrenal and adrenocorticotrophic (ACTI-I) hormones (Heroux and Hart, 1954;Speirs and Meyer, 1949) and stressors such as pain, heat, cold, and fasting (Sayers, 1950). It has been hypothesized that elevated catecholamine output resulting from stress causes release of AC'TH via hypothalamohypophyseal pathways, which in turn elevates the output of cortical hormones.…”

Section: Discussionmentioning

confidence: 99%

Effect of Forced Swimming on Body Temperatures and Eosinophil Levels in Cotton Rats (Sigmodon Hispidus)

Sealander¹,

Guess²

1970

Journal of Mammalogy

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Cotton rats, Sigmodon hispidus, were forced to swim in water at 2 and 10°C. Body temperatures (TB) declined most rapidly during the first 6 minutes of the swim and the rate of fall was nearly halved during the remainder of the swim. The rate of decline in TB was more rapid in the 2 than in the 10°C bath, . . but the per cent change in TB at the end of the swimming was about the same at both bath temperatures (about 43 per cent) . The mean TB of the 26 cotton rats tested was 21.4 ± 0.6°C at the end of swimming, and there was no significant difference in the total decline in TB at the two bath temperatures. The eosinophil count declined by 52.5 and 6,3.0 per cent in cotton rats swimming at 2, and 10°C, respectively, and there was no evident correlation between the magnitude of the eosinophil response and body weight, swimming time ·or percentage decrease in TB.Cotton rats, Sigmodon hispulus, periodically show striking changes in numbers. The underlying causes of irruptions and erratic fluctuations in population size of this mammal over much of its range are poorly known, but it is believed that cotton rats may be more susceptible to certain environmental stress factors than some small mammal species that maintain fairly stable popula.tions (Chipman, 1966;Davis, 1958). There is some evidence indicating that the range of the cotton rat expands northward in favorable years but is pushed southward in years with severe winters (Cockrum, 1952). Also, there is reason to believe that the thermoregulatory abilities, both behavioral and physiological, of the cotton rat are not adequate to cope with extended periods of cold in northern portions of its range as shown by population. reductions or die-offs during severe cold-snaps (Dunaway and Kaye, 1961).One objective of this study was to establish an average or "normal" body temperature of .cotton rats and to relate this to weight, sex, relative age, and acclimation to a relatively constant temperature and standard diet during a 3-week laboratory confinement. A second objective was to evaluate the stress resistance of cotton rats in terms of their thermoregulatory performance and decline in circulating eosinophils in response to combined hypothermic and muscular stresses induced by forced swimming in cold water. Hopefully, this portion of the study would provide a base for later studies on effects of season and nutritive plane on stress resistance in cotton rats. METHODS AND MATERIALSCotton rats were trapped with Sherman live traps in the environs. of Fayetteville, Washington Co., Arkansas, from October 1960 through May 1961. Captured rats were sorted into age groups according to body weight measured to the nearest 0.1 gram (Sealander and Walker, 195.5) and were caged in an animal room in which the ambient temperature ranged from about 22 to 25°C. 348 by guest on June 9, 2016 http://jmammal.oxfordjournals.org/ Downloaded from

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Section: Discussionmentioning

confidence: 99%

Effect of Forced Swimming on Body Temperatures and Eosinophil Levels in Cotton Rats (Sigmodon Hispidus)

Sealander¹,

Guess²

1970

Journal of Mammalogy

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“…It has been shown by many investigators that exercise will cause an increase in glucocorticoid levels (BoSovifc and Koshial -2wanovic, 1952;Staehelin et al, 1955;Suzuki et al, 1958;and Connell et al, 1958). In a report by Keeney (1960) it was suggested that physiological training could enhance this increase.…”

Section: Exercisementioning

confidence: 99%

“…to an increase in stress. It has been suggested byKeeney (1960) that this increase can be enhanced and prolonged by physiological training.…”

mentioning

confidence: 99%

Effects of exercise, thyroxine, and age on corticosterone production in the male rat

Craig

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“…Kullander (1960) and Baca and Chiodi (1965) Critz (1966), Critz and Withrow (1965) and Geber, et al (1966). Keeney (1960) has also reported eosinopenia in animals exercised utilizing an acute training regimen. Staehelin, et al (1955) and Suzuki, et^ a^-(1958) have shown increased plasma corticosteroid values in the human and dog in response to short term exercise.…”

Section: Thyroid-adrenal Cortical Interactionsmentioning

confidence: 93%

Effects of age, exercise, graded thyroxine levels and adrenocorticotrophic hormone upon the in vitro secretion of corticosterone in the male rat

Pritchett

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Effect of training on eosinophil response of exercised rats

Cited by 7 publications

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Effect of Forced Swimming on Body Temperatures and Eosinophil Levels in Cotton Rats (Sigmodon Hispidus)

Effect of Forced Swimming on Body Temperatures and Eosinophil Levels in Cotton Rats (Sigmodon Hispidus)

Effects of exercise, thyroxine, and age on corticosterone production in the male rat

Effects of age, exercise, graded thyroxine levels and adrenocorticotrophic hormone upon the in vitro secretion of corticosterone in the male rat

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