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Results 201 - 250 of 664
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Liu Min - - 2004
Apolipoprotein A-IV (apo A-IV) is a satiety protein synthesized in the small intestine and hypothalamus. To further understand the roles of central apo A-IV in the management of daily food intake, we have examined the diurnal patterns of hypothalamic apo A-IV gene and protein expression in freely feeding and food-restricted ...
Kuriyama H - - 2004
Although gender differences in the response to stress have been reported, differences in stress-induced changes in feeding behavior have not been well studied. In this report, inhibition of food intake was compared in male and female rats following 1 h of restraint, electric footshock, or emotional stress induced by a ...
Baskaran V - - 2004
A rat bioassay was conducted to preclinically evaluate nutritional quality of two supplementary foods (SFs) developed based on corn and soy blends for feeding preschool children. The SFs prepared by extrusion cooking and subsequently modified to taste either sweet or salty provide 395 +/- 2 kcal of energy and 20 ...
Darsaud A - - 2003
Animal models of Human African Trypanosomiasis (HAT) have been developed to understand the pathogenic mechanisms leading to the passage into the neurological phase, most of them referring to histological aspects but not clinical or behavioral data. Our study aimed at defining simple clinical and/or behavioral markers of the passage between ...
Güven Mustafa - - 2003
We re-studied the distribution of paw preference in rats using a new computerized food-reaching test, which recorded the times and time intervals between the single right- and left-paw entries. Using the traditional food-reaching test, we found that of 144 rats, 72.7% were right-handed, 19.7% left-handed, and 7.6% mixed-handed. This population-level ...
Kelley A E - - 2003
Brain opioid peptide systems are known to play an important role in motivation, emotion, attachment behaviour, the response to stress and pain, and the control of food intake. Opioid peptides within the ventral striatum are thought to play a key role in the latter function, regulating the affective response to ...
B Ganaraja, P S ...
It is well known that the primary control of the ingestive behaviours in the animals rests in the hypothalamic centres. The modulatory activities of the other subcortical areas on this subject had been widely debated. The involvement of the amygdaloid centres in this had been confirmed.1-6 Lesion and stimulation studies ...
Stricker Edward M - - 2003
To determine the temporal relation between the ingestion of dry food containing 8% NaCl and the increased daily consumption of water that occurs when rats eat this diet, rats were placed in specially designed cages linked to microprocessors that allowed the continuous monitoring of food and water ingestion. The increase ...
Gamaro Giovana D GD Departamento de Bioquimica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo. CEP: 90035-003. Porto Alegre, RS, - - 2003
The effect of a model of depression using female rats on Na+, K+-ATPase activity in hippocampal synaptic plasma membranes was studied. In addition, the effect of further chronic treatment with fluoxetine on this enzyme activity was verified. Sweet food consumption was measured to evaluate the efficacy of this model in ...
Monda M - - 2003
AIMS: As the nucleus accumbens shell plays an important role in the control of eating behaviour, the aim of this study was to evaluate the changes in: (a) the level of aspartic and glutamic acids in the accumbens shell of conditioned rats after the presentation of an aversive diet containing ...
Abiko T - - 2003
To examine the roles of aromatic rings Tyr residues at positions 1 and 6 and Phe residues at positions 16, 17 and 19 of rat neuromedin U-23 (NMU-23) (Tyr-Lys-Val-Asn-Glu-Tyr-Gln-Gly-Pro-Val-Ala-Pro-Ser-Gly-Phe-Phe-Leu-Phe-Arg-Pro-Arg-Asn-NH(2)) for reducing food intake activity in male Wistar rats, two NMU-23 analogues, [Phe(4F)(16,17,19)]NMU-23 and [Tyr(Me)(1,6)]NMU-23, were synthesized by Fmoc strategy of ...
Luo LuGuang - - 2003
The effects of thyroid hormone on whole body energy metabolism and compensatory effects on food intake are well established. However, the hypothalamic mechanisms that translate perceived whole body energy demands into subsequent appetitive behavior are incompletely understood. In order to address this question, we tested the effects of T3 on ...
Galef Bennett G BG - - 2003
Immediately after a recently fed rodent demonstrator interacts with a conspecific observer, the observer shows a substantially enhanced preference for whatever food its demonstrator ate. Here we show that (1) influence of a single, 30-min interaction with a demonstrator on an observer's food preference lasts for at least 1 month, ...
Holland Peter C - - 2003
Pavlovian conditioned stimuli (CSs) for food can enhance both the performance of instrumental responses that earn food (Pavlovian-instrumental transfer; PIT) and the consumption of food itself (CS-potentiated feeding). After a single phase of Pavlovian training, each rat was tested in both PIT and potentiated feeding tasks. Rats with lesions of ...
Vergara-Aragon Patricia - - 2003
Parkinson's disease is characterized by tremor, rigidity, bradykinesia, and postural abnormalities ascribed to the loss of nigrostriatal dopamine (DA). Symptoms similar to the human condition can be produced in the rat by DA-depleting 6-hydroxydopamine injections made into the nigrostriatal system. After a unilateral lesion, the rat symptoms include sensory and ...
Gamaro G D - - 2003
Chronic variate stress was seen to decrease the ingestion of sweet food when compared to control rats. Brain monoamines are known to be involved in the control of food intake, serotonin appears to be involved in the mechanisms of satiety, and dopamine in mediating appetite or approach behaviors triggered by ...
DiGello Elizabeth - - 2002
Rats learn the spatial pattern in which hidden caches of food are located. Once the pattern is learned, finding one or more baited locations provides (positive) information about the remaining baited locations. In the present experiment, we examined whether negative information (the absence of food in a location) would also ...
Grover Jagdish Kumari - - 2002
Plants in the form of food or other remedial forms have been used for the treatment of various human ailments. Diabetes is one such disorder in which various form of plants and herbal remedies have been tried. Brassicajuncea (BJ) seeds (Rai) are consumed in India as a spice in various ...
Hrupka Brian J - - 2002
To investigate further the site where estradiol (E(2)) inhibits food intake, we tested the effects on feeding of subcutaneous and intrahypothalamic implants of 10% E(2) benzoate in cholesterol (CHOL) or CHOL alone. E(2) was implanted subcutaneously in Silastic tubes, and intrahypothalamically via bilateral 29-gauge cannulas into the paraventricular nucleus (PVN) ...
Pizzo Matthew J - - 2002
Ordinal, interval, and circadian mechanisms of solving a time-place task were tested. Rats searched for food twice in the morning and once in the afternoon (Group AB-C, n = 5) or once in the morning and twice in the afternoon (Group A-BC, n = 5) in a box with four ...
Coutureau E - - 2002
Neural manipulations were used to examine the mechanisms that underlie the acquired equivalence and distinctiveness of cues in rats. Control rats and those with excitotoxic lesions of either the hippocampus (HPC) or entorhinal cortex (EC) acquired the following conditional discrimination: In Contexts A and B, Stimulus X-->food and Stimulus Y-->no ...
Thorpe Christina - - 2002
This experiment examined the effect of medial prefrontal lesions on time-place learning in the rat. During the first phase, prior to lesioning, rats received training on an interval time-place task. Food was available on each of four levers for 3 consecutive min of a 12-min session. The levers provided food ...
Sako Noritaka - - 2002
To examine the importance of the hardness of foods, we conducted behavioral and electromyographical experiments in Wistar male rats using three kinds of pellets, a hard commercially made pellet (MF), a hard privately produced pellet (H) and a soft privately produced pellet (S). MF and H had the same hardness ...
Salinas Juan A JA Department of Psychology, University of Texas at Austin, Austin, TX 78712, USA. - - 2002
Male Fischer 344 rats received chronic exposure to either water containing 250 ppm lead or tap water. On the first day of the study, rats were allowed to habituate to a 1-m(2) open field arena with a rectilinear grid pattern of food wells on the floor for a 2-min session. ...
Grasmuck V - - 2002
Previous studies have shown that a behavioural differentiation appeared in groups of rats subjected to an experimental design in which access to the feeder was made difficult. Some rats brought back food pellets to the cage (divers) while the others (non-divers) stayed in the sole home cage and obtained food ...
Holland Peter C - - 2002
Both control rats and rats with neurotoxic lesions of the amygdala central nucleus ate more food during presentations of a conditioned stimulus (CS) previously paired with food than during an unpaired CS. This potentiation occurred regardless of whether the food was presented in its usual place or in a different ...
Seto Yasuyuki - - 2002
BACKGROUND/AIMS: The nutritional effects of pouch replacement after total gastrectomy remain clinically controversial. Two previous experiments failed to show any nutritional benefit. However, the pouches applied clinically and examined experimentally so far were all of anti-peristaltic type. METHODOLOGY: Male 7- or 8-week-old Wistar rats were divided into 3 experimental groups ...
Pal G K - - 2002
Twenty-four hour basal food and water intakes were recorded in Wistar rats. Diabetes was produced in a group of rats by injecting streptozotocin (STZ, 75 mg/kg, b.w., IP) and their post-diabetic basal food and water intakes were recorded. Noradrenaline (2 microg) and dopamine (2 microg) were injected separately into the ...
Marzo F - - 2002
The influence of extrusion cooking on the protein content, amino acid profile, and concentration of antinutritive compounds (phytic acid, condensed tannins, polyphenols, trypsin, chymotrypsin, alpha-amylase inhibitors, and hemagglutinating activity) in kidney bean seeds (Phaseolus vulgaris L. var. Pinto) was investigated. Growing male rats were fed diets based on casein containing ...
Parker Graham C - - 2002
We have recently reported that bilateral infusions of the 5-HT receptor antagonist metergoline (MET) into the posterior basolateral amygdala (pBLA) elicit feeding in female rats tested at mid-light cycle. The present study was performed to determine whether (1) testing at two different phases of the estrous cycle, and/or (2) the ...
Oddie Scott D - - 2002
It is well known that damage to the hippocampal formation (Ammon's horn, dentate gyrus, fimbria-fornix, and other pathways) produces impairments in spatial navigation and in certain forms of learning. Lesions within these structures have also been reported to produce some motor impairments, but the nature of these impairments is less ...
Abiko T - - 2002
To examine the roles of aromatic rings, Tyr residues at positions 1 and 5 and Phe residues at positions 16, 17, and 19 of rat neuromedin U-23 (NMU-23) (Tyr-Lys-Val-Asn-Glu-Tyr-Gln-Gly-Pro-Val-Ala-Pro-Ser-Gly-Gly-Phe-Phe-Leu-Phe-Arg-Pro-Arg-Asn-NH2) for reducing food intake activity in male Wistar rats, two NMU-23 analogues, [Phe(4F)16,17,19] NMU-23 and [Tyr(Me)1,6]NMU-23, were synthesized by Fmoc strategy ...
Tuohy K - - 2002
AIMS: The generation of data of real relevance to the purported risks of DNA transfer from food-borne genetically modified microorganisms (GMMOs) using the human biota associated (HBA) rat model. Plasmid transfer between Lactococcus lactis strains and between donor strains and human gut bacteria was monitored. METHODS AND RESULTS: Transfer of ...
Norese María F - - 2002
The anorexic effect of exposure to high altitude may be related to the reduction in the arterial oxygen content (Ca(O2)) induced by hypoxemia and possibly the associated decreased convective oxygen transport (COT). This study was then performed to evaluate the effects of either transfusion-induced polycythemia or previous acclimation to hypobaria ...
Brown M F - - 2001
Rats searched in a matrix of vertical poles for food hidden on top of the poles. The only information available about the location of the food was the consistent spatial pattern of the baited poles, which was a checkerboard. This spatial pattern of hidden-food locations came to control the choices ...
Boileau T W - - 2001
We previously demonstrated that the castration of male rats profoundly increases hepatic lycopene compared with intact controls. Here we further characterized the role of testosterone in modulating hepatic lycopene accumulation and isomer patterns in male rats. Furthermore, because castration significantly decreases ad libitum food consumption, we investigated the influence of ...
Abiko T - - 2001
A nonapeptide, H-Asn-Gln-Trp-Ala-Val-Gly-His-Leu-Met-NH2, corresponding to amino acids 6 to 14 of bombesin and its four analogues were synthesized by a solid-phase method and were tested for their comparative effect on reducing activity on food intake using male Wistar rats. The synthetic bombesin-fragment6-14 showed reducing effect on food intake using male ...
Rollins B L - - 2001
Female rats with posterodorsal amygdala (PDA), basolateral amygdala (BLA), or sham lesions were compared regarding ad libitum food intake, weight gain, consumption of a novel food, and acquisition of a conditioned taste aversion (CTA). While only the rats with PDA lesions evidenced substantial weight gains at 10 days after surgery ...
Starbuck E M - - 2001
A lesion of the subfornical organ (SFO) may disrupt drinking after a meal of dry chow as it does drinking after intragastric administration of hypertonic saline. Food and water intakes of SFO-lesioned (SFOX) and sham-lesioned rats were measured during 90-min tests following various lengths of food deprivation. During the tests, ...
Galef B G BG - - 2001
Six experiments were undertaken to explore factors affecting young rats' (Rattus norvegicus) frequencies of stealing food from conspecifics when identical food is available in surplus. It was found that (a) rats would walk across a bed of pellets to steal the particular pellet a peer was eating, (b) frequency of ...
Metz G A - - 2000
Many animals in different mammalian orders display skilled forelimb use for prehension, but there has been little study of the rules underlying skilled forelimb use that may provide insight into its neural organization. Inflexibility of movement would imply an underlying fixed neural control characteristic of innate action pattern, whereas flexibility ...
Giorgetti M - - 2000
The effects of protracted cocaine administration (15 mg/kg i.p., twice a day for 9 days) on the circadian pattern of feeding behavior was studied in individually housed male Sprague-Dawley rats, maintained under a 12:12 light:dark cycle. Water and food were available ad libitum and food intake was measured twice a ...
Ganaraja B - - 2000
Amygdaloid nuclei and the hypothalamic structures are known to have intimate functional relationships. But to date the nature of this relationship has not been completely understood. In the present study, this relationship was evaluated. Lesions were performed in basolateral nucleus of amygdala (BLA) and the ventromedial hypothalamus (VMH) in the ...
Ronca A E - - 2000
In the present study, we analyzed the relationship between body mass, food and water intake, and behavioral activity in pregnant and lactating rat dams exposed to continuous, 1.5-g centrifugation for 32 days. The period of centrifugation spanned from Gestational day (G) 11 of the rats' 22-day pregnancy until Postnatal day ...
Galef B G BG - - 2000
A naive observer Norway rat offered a choice between two foods, after it interacts with a demonstrator rat fed one of those foods, increases its preference for whichever food the demonstrator rat ate. It is not known whether interaction with a demonstrator rat would also increase the amount that an ...
Casas M - - 2000
This study investigated whether methylxanthines (caffeine and theophylline) would restore food and water intake in rats made aphagic and adipsic by bilateral 6-hydroxydopamine lesions of the nigrostriatal bundle, and these results were compared with the effects of d-amphetamine, the dopamine D(1) agonist SKF 38393, and the D(2/3) agonist quinpirole. In ...
Davidson A J - - 2000
Rats anticipate daily restricted meals with increased approaches to a feeder and an increase in core body temperature. Food anticipatory activity (FAA) is thought to be under the control of a feeding-entrained circadian oscillator. Although numerous forebrain lesions have failed to permanently abolish FAA, the hindbrain has not been investigated. ...
Kawagishi H - - 2000
In an experiment in which rats were allowed free access to food and water, the rats did not eat the diet containing a mushroom Pleurotus ostreatus even if they were emaciated. A P. ostreatus lectin (POL) was isolated from the mushroom as the food intake-suppression principle. In hemagglutination inhibition assays, ...
Flo G - - 2000
Simmondsin, 2-(cyanomethylene)-3 hydroxy 4,5 dimethoxy cyclohexyl beta-D-glucoside, from jojoba meal reduces food intake in rats. We investigated the mechanism of action simmondsin, by studying the effects of fasting or of vagotomy on the food intake reduction. The food intake reduction was significantly less in fasted rats than in non-fasted rats. ...
Tuomisto J T - - 2000
Effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on food selection were studied in TCDD-resistant Han/Wistar and TCDD-sensitive Long-Evans rats and their crosses. The rats were offered a selection diet consisting of chocolate, cheese, and chow, and TCDD was given at the same time or 4 or 16 days later. TCDD persistently reduced the ...
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