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Titolo:
Food intake patterns are altered during long-term zinc deficiency in rats
Autore:
Rains, TM; Hedrick, S; Randall, AC; Lee, RG; Kennedy, KJ; Shay, NF;
Indirizzi:
Univ Illinois, Div Nutr Sci, Urbana, IL 61801 USA Univ Illinois Urbana ILUSA 61801 ois, Div Nutr Sci, Urbana, IL 61801 USA Univ Illinois, Dept Food Sci & Human Nutr, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 Sci & Human Nutr, Urbana, IL 61801 USA
Titolo Testata:
PHYSIOLOGY & BEHAVIOR
fascicolo: 3, volume: 65, anno: 1998,
pagine: 473 - 478
SICI:
0031-9384(199812)65:3<473:FIPAAD>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIETARY SELF-SELECTION; NEUROPEPTIDE-Y; PARAVENTRICULAR NUCLEUS; MACRONUTRIENT SELECTION; MEAL PATTERNS; DEPRIVATION; PREFERENCES; CARBOHYDRATE; INGESTION; MORPHINE;
Keywords:
zinc deficiency; diurnal food intake; macronutrient preference;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Shay, NF Univ61801nois, Div Nutr Sci, 260 Bevier Hall,905 S Goodwin Ave, Urbana, IL Univ Illinois 260 Bevier Hall,905 S Goodwin Ave Urbana IL USA 61801
Citazione:
T.M. Rains et al., "Food intake patterns are altered during long-term zinc deficiency in rats", PHYSL BEHAV, 65(3), 1998, pp. 473-478

Abstract

Rats experience anorexia and reduction or cessation in growth after being provided a zinc-deficient diet. While zinc deficient, intake levels may be reduced 50% or more compared to control rats. In the present report, diurnal food intake patterns of male Sprague-Dawley rats were measured during zinc deficiency. In Study 1, rats consuming a modified AIN-93 diet were testedduring the dark phase using an automated food weighing system. In zinc-deficient animals (Zn-), the onset of the first meal of the dark phase was delayed compared to zinc-adequate rats (Zn+; 106 +/- 47 vs. 23 +/- 5 min; p < 0.05) and the number of meals consumed during the dark phase was reduced inZn- vs. Zn+ rats (3.9 +/- 0.5 vs 7.1 +/- 0.4; p < 0.05). In Study 2, diurnal food intake patterns were tested using a three-choice macronutrient self-selection paradigm of carbohydrate-, protein-, and fat-containing diets made deficient or adequate in zinc (1 or 30 mg Zn/kg diet). Food intake was recorded in the early-, mid-, late-dark period (4 h each) and light period (12 h). Carbohydrate intake was 70% of total intake of both Zn+ and Zn- ratsduring the first 5 days, but decreased significantly to 50% in the Zn- group during the last 5 days. Fat intake increased significantly in the Zn- group during the last 5 days. This increase was the result of 4 of 15 Zn- rats increasing their intake of fat significantly. Results of this study indicate that zinc status alters dark phase and macronutrient selection patternsby delaying consumption of the initial meal of the dark phase, reducing the average meal number and by changing the dominant macronutrient preferenceof some Zn- rats. (C) 1998 Elsevier Science Inc.

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Documento generato il 11/07/20 alle ore 20:50:58