Thermogenesis in normal rabbits and rats: no role for brown adipose tissue?

Brockway, J. M.; Lobley, GE

doi:10.1113/jphysiol.1981.sp013692

The Journal of Physiology

1981

DOI: 10.1113/jphysiol.1981.sp013692

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Thermogenesis in normal rabbits and rats: no role for brown adipose tissue?

J. M. Brockway¹,

GE Lobley²

Abstract: 1. The occurrence of dietary and cold‐induced thermogenesis in young rabbits was unaffected by noradrenaline or propranolol, and it is concluded that the brown adipose tissue, although detectable histologically, is non‐functional. 2. Noradrenaline treatment caused an increase in oxygen consumption in albino, but not in hooded rats, suggesting that the former breed may possess brown adipose tissue capable of thermogenesis.

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Cited by 6 publications

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Changes in body temperature after administration of adrenergic and serotonergic agents and related drugs including antidepressants: II

Clark

Lipton

1986

Neuroscience & Biobehavioral Reviews

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This survey continues a second series of compilations of data regarding changes in body temperature induced by drugs and related agents. The information listed includes the species used, the route of administration and dose of drug, the environmental temperature at which experiments were performed, the number of tests, the direction and magnitude of change in body temperature and remarks on the presence of special conditions, such as age or brain lesions. Also indicated is the influence of other drugs, such as antagonists, on the response to the primary agent. Most of the papers were published from 1980 to 1984 but data from many earlier papers are also tabulated.

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Changes in body temperature after administration of adrenergic and serotonergic agents and related drugs including antidepressants: II

Clark

Lipton

1986

Neuroscience & Biobehavioral Reviews

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The histopathology of enterovirus infections of new-born mice

Roberts¹,

Boyd²

1987

Journal of Infection

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Effect of dietary protein concentration and ambient temperature on the energy, protein and water metabolism of the rat

Harri¹,

Brockway²

1985

Br J Nutr

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1. Groups of rats (n 8) were offered, to appetite, diets containing 10 (LP), 25 (MP) and 45 (HP) % of gross energy as protein energy from 45 d of age to slaughter 50 d later. At 53 d of age, half the rats on each diet were left at 22" while the other half were transferred to 6". Water balances were measured daily, and digestibilities of energy and nitrogen and the metabolizability of the diets were measured for each rat over a 7 d period at some stage between the age of 74 and 95 d. The rats were slaughtered at day 95 and their carcasses were analysed for protein, lipid, energy and ash contents. Energy expenditure was calculated as the difference between metabolizable energy intake and energy retained.2. Growth performance was best on the MP diet at both temperatures. At 22" the rate of gain of body-weight and of energy retention, although not of protein, were slightly reduced on the HP diet while overall performance was markedly inferior on the LP diet. At 6' the LP diet, while not so good as the MP diet, led to significantly better all-round growth performance than did the HP diet. Cold increased the energy expenditure of the rats by 50% (109-138 kJ/d); the increase was greater for the LP group than for the HP group.3. Intrascapular brown adipose tissue hypertrophied in response to cold and to the LP diet. 4. Adrenal gland size was significantly increased by cold exposure and by increasing level of dietary protein concentration.5. Urine volume was more closely related to the intake of protein than to that of energy. Urinary N concentration for the HP rats was approximately double that for those on the LP diet. Cold-exposed rats had a high water content in their fat-free carcasses, but there were no differences between the dietary treatments.

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Thermogenesis in normal rabbits and rats: no role for brown adipose tissue?

Cited by 6 publications

References 5 publications

Changes in body temperature after administration of adrenergic and serotonergic agents and related drugs including antidepressants: II

Changes in body temperature after administration of adrenergic and serotonergic agents and related drugs including antidepressants: II

The histopathology of enterovirus infections of new-born mice

Effect of dietary protein concentration and ambient temperature on the energy, protein and water metabolism of the rat

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