Introduction: Ghrelin increases growth hormone secretion and food intake. Growth hormone (GH), steroid hormones and opioids are involved in the regulation of food intake. So, they may have a role in the regulation of ghrelin secretion. We determined the effect of intravenous injections of progesterone, GH and morphine or co-administration of these hormones on ghrelin concentration and body w...

It has long been known that severe food deprivation disrupts the estrous cycle. One of the main problems with behavioral tasks that use food for reinforcement is the requirement that the animal be food deprived. This manipulation could be problematic in studies using female animals, since it may interfere with the estrous cycle of the animals. The purpose of the present study was to investigate...

Background: The increase of stress following the technological improvements appears to be an important factor that causes organs disorders like genital system. Therefore the present study was conducted to investigate the effects of chronic multiple sequential stress on rat epididim. Materials and Methods: 18 Wistar rats were divided randomly into two equal groups. In animals under stress, the m...

The present study was conducted to verify whether experimental conditions such as obesity and food deprivation, which promote food intake and reduce thermogenesis, could modify the expression of the corticotropin-releasing hormone (CRH)-binding protein (BP) in the rat brain. In situ hybridization, histochemistry, and immunohistochemistry were used to assess the expression of CRH-BP in lean ( Fa...

Compensatory increases in food intake are commonly observed after a period of food deprivation in many species, including laboratory rats and mice. Thus it is interesting that Syrian hamsters fail to increase food intake after a period of food deprivation, despite a fall in plasma leptin concentrations similar to those seen in food-deprived rats and mice. In previous laboratory studies, food-de...

The present experiment examined the effects of food deprivation upon predatory attack elicited by electrical stimulation of lateral hypothalamic sites in the cat. Latencies for attack initiation and for object contact were assessed under ad libitum feeding conditions and compared, in a within-subjects design, to attack latendes following 72 hr of food deprivation. Both initiation and object con...

Patterns of physiological flexibility in response to fasting are well established, but much less is known about the contribution of water deprivation to the observed effects. We investigated body composition and energy and water budget in three groups of zebra finches: birds with access to food and water, food-deprived birds having access to drinking water and food-and-water-deprived birds. Ani...

The primary aim of this study was to examine the effects of 48-h food deprivation on rat skeletal muscle fiber type, according to myosin heavy-chain (MyHC) isoform composition and some metabolism-related factors in both slow-type dominant and fast-type dominant muscle tissues. Male Wistar rats (7 wk old) were treated with 48-h food deprivation or ad libitum feeding as control. After the treatme...