Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"Corticosterone, CORT"”.
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The impact of urban centers on American goldfinches (Spinus tristis) overwintering at high latitudes
… to sample baseline and stress-induced plasma corticosterone (CORT) levels. Analyses revealed no interaction of latitude and urbanization in the winter distribution of American Goldfinches. Similarly, CORT concentrations did not differ between individuals trapped in urban and rural settings. It …
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Effects of Stress, Circadian Rhythms, and Dietary Sodium on Brain Cell-Nuclear Uptake of Aldosterone and Corticosterone (Steroid Receptors)
… adrenal steroid hormones aldosterone (ALD) and corticosterone (CORT) in brain cell-nuclei has been implicated as a necessary step in the behavioral and physiological actions of these hormones. In vivo uptake of radioactively labeled ALD and CORT in adrenalectomized (ADX) rats indicates a strong …
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ACUTE STRESS, BUT NOT CORTICOSTERONE, FACILITATES ACQUISITION OF PAIRED ASSOCIATES LEARNING ASSESSED IN RATS USING TOUCHSCREEN-EQUIPPED OPERANT CONDITIONING CHAMBERS
… of restraint stress (30 min) or injection of corticosterone (CORT; 3 mg/kg). Daily performance was then monitored for one week. We found that only the animals subjected to restraint stress performed with higher accuracy and task efficiency, when compared to untreated controls. These results …
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Modeling the Psychiatric Aspects of Polycystic Ovary Syndrome and Induced Stress
… a stress condition, subjects were implanted with corticosterone (CORT) pellets to model the complex interaction of stress and PCOS on depression- and anxiety-like behavior. Data analysis for depression-like behavior on the forced swim test showed a significant main effect of time, with subjects …
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Sex Ratios and the City: Is parental corticosterone a mediator of the relationship between urbanization and offspring sex allocation?
… parental condition, and sex ratios is corticosterone (CORT), the primary glucocorticoid in birds. However, no research has examined the links between urbanization, individual condition, CORT, and adaptive sex allocation within the same study. Furthermore, research that has examined …
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Stress-Related Effects of Phoenixin on Nucleus of the Solitary Tract Neurons
… was recovered. Rats were then placed on a corticosterone (CORT)-stressor treatment that replicated the decreased PNX responsiveness within 2 weeks and had no effect on the responsiveness of neurons to another neuropeptide, Angiotensin II (ANG). These results implicate PNX in the central …
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Unraveling the interaction between hormones and incubation temperature on lizard cognition
… how prenatal thermal environment and corticosterone (CORT) - a key stress hormone in reptiles - affects cognitive development in two species of skinks: the delicate skink (Lampropholis delicata), and the common garden skink (L. guichenoti). I manipulated egg CORT levels and incubation …
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Unraveling the interaction between hormones and incubation temperature on lizard cognition
… how prenatal thermal environment and corticosterone (CORT) - a key stress hormone in reptiles - affects cognitive development in two species of skinks: the delicate skink (Lampropholis delicata), and the common garden skink (L. guichenoti). I manipulated egg CORT levels and incubation …
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Effects of Anthropogenic Environmental Stressors on Amphibian Immune Defenses and Host-Pathogen Interactions Across Temperate and Tropical Systems
… stress responses are governed by glucocorticoids, which are responsible for homeostasis, resource allocation, and remobilization of energy stores, but can also directly and indirectly impact host immune function. Amphibians are the most threatened vertebrate taxon, in part because of …
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Microvascular Function and Remodeling Due to Chronic Changes Within the Skeletal Muscle Microenvironment
… through manipulation of TIMP1 expression or glucocorticoid (GC) levels. Furthermore, blood flow was altered via femoral artery (FA) ligation or prazosin treatment. This dissertation includes three primary hypotheses and corresponding findings to examine the importance of alterations to the …
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Seasonal Variation in Corticosterone, Stress Responses, and Physiology in the Northern Cardinal <i>Cardinalis cardinalis</i>
<p>Seasonal regulation of the adrenocortical response (e.g., ‘stress response’) appears to be ubiquitous in mid- to high-latitude vertebrates. Northern Cardinals (Cardinalis cardinalis) are a Temperate dwelling passerine of Tropical-descent with a wide species range (tropics to Northern Temperate …
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The crucial role of reelin in a preclinical model of depression
… episode relapses. Rats treated for 21 days with corticosterone (CORT), a well characterized model of depression, exhibit a depression-like phenotype. Additionally, CORT treated rats have shown a downregulation in reelin. Reelin is a large glycoprotein that has been implicated in many psychiatric …
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Hormonal Mediation of a Unique Behavioral Polymorphism in the White-throated Sparrow (Zonotrichia albicollis)
… play a similar role in females. Next I ask how corticosterone binding globulin (CBG) modulates T action. I found that CBG binds over 90% of T and is an important modulator of T action in this species. However CBG capacity did not differ between morphs, nor did morphs differ in baseline levels of …
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Glucocorticoid physiology and behavior during life history transitions in Laysan Albatross (Phoebastria immutabilis)
… entire 2-month incubation period. I found total corticosterone (CORT) increased both within individual incubation shifts and over the season as body mass declined. Corticosteroid binding globulin (CBG) significantly increased as individual body condition declined. Though CORT secretion steadily …
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Hormonal Mediation of a Unique Behavioral Polymorphism in the White-throated Sparrow (Zonotrichia albicollis)
… play a similar role in females. Next I ask how corticosterone binding globulin (CBG) modulates T action. I found that CBG binds over 90% of T and is an important modulator of T action in this species. However CBG capacity did not differ between morphs, nor did morphs differ in baseline levels of …
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Glucocorticoid physiology and behavior during life history transitions in Laysan Albatross (Phoebastria immutabilis)
… entire 2-month incubation period. I found total corticosterone (CORT) increased both within individual incubation shifts and over the season as body mass declined. Corticosteroid binding globulin (CBG) significantly increased as individual body condition declined. Though CORT secretion steadily …
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Stress, sexual signaling, and alternative mating tactics in male green treefrogs, Hyla cinerea
… that stimulate production of the stress hormone corticosterone (CORT) in vocal competitors, suggesting a role of CORT in intrasexual competition. I predicted that modulation of CORT level during intraspecific contests plays a pivotal role in regulating the expression of male courtship signals and …
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The effects of stress hormones on preferences for acoustic signals in female green treefrogs (Hyla cinerea) and barking treefrogs (Hyla gratiosa)
… that circulating stress hormones (i.e., glucocorticoids) may mediate such effects, but this idea remains largely unexplored. I examined how circulating glucocorticoids affect preferences for male advertisement calls in female green treefrogs, <italic>Hyla cinerea<italic>, and barking …
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Testosterone’s regulation of the HPA axis differs for adolescent and adult male rats
Stress hormones such as corticosterone (CORT), enables rodents to cope and meet the demands of their environment. In adult male rats, CORT release in response to stressors is dampened by the gonadal hormone testosterone. Adolescent male rats secrete more CORT in response to stressors than do adults …
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Antidepressant-Like Effects of Ketamine on Fear Conditioning and Extinction
… induces a state of chronically elevated glucocorticoid exposure in the brain, which is neurotoxic and can lead to the dysfunction of glutamatergic signaling. Since memory is highly dependent upon glutamatergic neurotransmission, patients with depression commonly display alterations in memory …
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