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315 results for “Cortisol”
Cortisol in fish scales remains stable during extended periods of storage.
<p>Dataset to accompany the manuscript: <a href="https://doi.org/10.1093/conphys/coae065">https://doi.org/10.1093/conphys/coae065</a></p> <p>The dataset contains two data files describing cortisol concentrations in the scales of adult salmon and a "Read Me" file that explains the data structure and source. </p>
Dataset of hair cortisol concentration in 950 finishing pigs on 20 commercial farms
<p>This dataset contains the hair cortisol concentrations of 950 finishing pigs. Pig hair was sampled as part of a study funded by the European project HealthyLivestock. Pigs were sampled in two separate batches on 20 farms (24 pigs/batch, two batches/farm. NB: 10 samples could not be analyzed at the laboratory). Farms were located in western France. A reference to the article relating to this dataset will be added when the article will be published.</p> <p>-The first sheet includes the 950 hair cortisol concentrations, distinguishing the batches and farms where pigs were sampled.</p> <p>-The second sheet includes the estimation of the average size of a pig batch on the 20 farms where hair was sampled + the estimation of the percentage of pigs sampled per batch.</p>
Perceived academic stress, hair and saliva cortisol concentrations, and their relationship with anthropometric measures associated with obesity in first-year medical students.
<p>Cortisol plays an important role between stress, weight gain, and the development of obesity. Therefore, we investigated the association between stress, eating behavior, cortisol, and anthropometric measures related to obesity in a sample of medical students. We determined cortisol concentrations by ELISA and related it to self-reported stress, eating behavior, and anthropometric measurements throughout the academic period. We report an increase in hair cortisol, higher self-reported stress scores, and BMI mainly in females. Finally, we found evidence of positive associations between capillary cortisol and BMI. Also, eating behavior is affected by perceived stress mainly in females.</p> <p>In this database, we provide weight variables, BMI, psychometric tests, and hormonal determinations.</p> <p><br> You can see two sheets in the Excel file. Sheet 1 includes the raw data and sheet 2 includes a description of each variable, as well as the bibliography (article or book) where each survey or protocol was obtained.</p> <p><br> In addition, the data specify the units of the hormonal variables, as well as the units of the anthropometric variables. If you have questions about the interpretation of psychometric test scores, you can contact our team for further details.</p> <p> </p>
Supplemental file for the manuscript "Utility of salivary cortisol and cortisone in the diagnostics of adrenal insufficiency"
<p>Supplemental file for the manuscript "Utility of salivary cortisol and cortisone in the diagnostics of adrenal insufficiency"</p>
Fig. 1 in 17,20β-P and cortisol are the main in vitro metabolites of 17-hydroxyprogesterone produced by spermiating testes of Micropogonias furnieri (Desmarest, 1823) (Perciformes: Sciaenidae)
Fig. 1. Radiochromatogram after TLC analysis of spermiating testes of Micropogonias furnieri males 1, 2 and 3 after toluene/cyclohexane 50/50 v/v (system I) and benzene/acetone 80/20 v/v (system II). The TLC zones further analyzed by HPLC are shown as A, B and C. The peak of precursor is shown as D. The authentic standards used were: 1 = 20-dihydrocortisone; 2 = 17,20,21-P; 3 = 17,20α-P; 4 = 11KT; 5 = 17,20ss-P; 6 = 11ssOH-A; 7 = Ad; 8 = testosterone; 9 = 17-P; 10 = A.
Figure 3 in Seasonal variations in immunoreactive cortisol and fecal immunoglobulin levels in Sichuan golden monkey (Rhinopithecus roxellana)
Figure 3. The immunoreactive cortisol concentrations of Sichuan golden monkeys within seasons (ng/g). Sp: Spring; Su: summer; Au: autumn; Wi: winter. FM refers to the mean of nonpregnant females (F1 and F2); MM refers to the mean of males (M1, M2, and M3). *,#, §,﹠: P <0.05, bar with * was significantly higher than bar with #, and bar with § was significantly higher than bar with ﹠.
Figure 5 in Seasonal variations in immunoreactive cortisol and fecal immunoglobulin levels in Sichuan golden monkey (Rhinopithecus roxellana)
Figure 5. The fecal immunoglobulin levels of Sichuan golden monkeys over the year (ng/g). FM refers to mean of nonpregnant females (F1 and F2); MM refers to mean of males (M1, M2, and M3).
Figure 2 in Seasonal variations in immunoreactive cortisol and fecal immunoglobulin levels in Sichuan golden monkey (Rhinopithecus roxellana)
Figure 2. Immunoreactive cortisol concentrations in males (M1 was the dominant male; M2 and M3 were all-male units) within seasons (ng/g). Sp: Spring; Su: summer; Au: autumn; Wi: winter. a,b,c,d: Histograms that share the same letters do not differ from each other, whereas histograms with different letters are different at P <0.05. *,#: P <0.05, bar with # was significantly higher than bar with *.
Figure 1 in Seasonal variations in immunoreactive cortisol and fecal immunoglobulin levels in Sichuan golden monkey (Rhinopithecus roxellana)
Figure 1. Immunoreactive cortisol concentrations in nonpregnant (F1 and F2) and pregnant (F3) females within seasons (ng/g). Sp: spring; Su: summer; Au: autumn; Wi: winter. a,b,c,d: Histograms that share the same letters do not differ from each other, whereas histograms with different letters are different at P <0.05. *,#: P <0.05, bar with * was significantly higher than bar with #.
Figure 4 in Seasonal variations in immunoreactive cortisol and fecal immunoglobulin levels in Sichuan golden monkey (Rhinopithecus roxellana)
Figure 4. The immunoreactive cortisol concentrations of Sichuan golden monkeys over the year (ng/g). FM refers to mean of nonpregnant females (F1 and F2); MM refers to mean of males (M1, M2, and M3).
Interstitial cortisol measurements aligned by wake time, healthy volunteers
Open the record for dataset details and reuse information.
Data from: Cooperation with closely bonded individuals reduces cortisol levels in long-tailed macaques
<p><span>Many animal species cooperate with conspecifics in various social contexts. While ultimate causes of cooperation are being studied extensively, its proximate causes, particularly endocrine mechanisms, have received comparatively little attention. Here, we present a study investigating the link between the hormone cortisol, cooperation and social bonds in long-tailed macaques (<i>Macaca fascicularis</i>). We tested 14 macaques in a dyadic cooperation task (loose-string paradigm), each with two partners of different social bond strength and measured their salivary cortisol before and after the task. We found no strong link between the macaques' cortisol level before the task and subsequent cooperative success. In contrast, we did find that the act of cooperating in itself led to a subsequent decrease in cortisol levels, but only when cooperating with closely bonded individuals. Two control conditions showed that this effect was not due to the mere presence of such an individual or the pulling task itself. Consequently, our study shows an intricate way in which the hypothalamic-pituitary-adrenal axis is involved in cooperation. Future studies should reveal whether and how our findings are driven by the anxiolytic effect of oxytocin, which has been associated with social bonding.</span></p>
Relationships between cortisol and testosterone in female titi monkeys (Plecturocebus cupreus) [dataset]
<p>[dataset for article in review]</p> <p>Steroid hormones are critical to the regulation of sociosexual behavior. Their role in the formation of pair bonds is complicated by the relative scarcity of this social system in mammals, as well as species and taxonomic differences in endocrine systems. In the present study, we experimentally manipulated the hypothalamic-pituitary-adrenal axis in female titi monkeys (<em>Plecturocebus cupreus</em>), a neotropical monkey studied for its strong, selective pair bonds. We validated a new assay for plasma and urinary cortisol in this species, showing a strong suppression of cortisol following dexamethasone injection, and a significant but somewhat blunted response to adrenocorticotrophin hormone (ACTH) stimulation. Urinary testosterone did not change in response to dexamethasone or ACTH. Plasma and urinary cortisol were highly correlated, whereas urinary cortisol and testosterone were only correlated when extreme cortisol values were included. In this study, we laid groundwork for studying the role of glucocorticoids and androgens (and eventually, their interactions with peptides) in the behavioral endocrinology of pair bonds in female titi monkeys.</p>
Exposure to exogenous egg cortisol does not rescue juvenile Chinook salmon body size, condition, or survival from the effects of elevated water temperatures
<p class="NormalThesis">Climate change is leading to altered temperature regimes which are impacting aquatic life, particularly for ectothermic fish. The impacts of environmental stress can be translated across generations through maternally-derived glucocorticoids, leading to altered offspring phenotypes. Although these maternal stress effects are often considered negative, recent studies suggest this maternal stress signal may prepare offspring for a similarly stressful environment (environmental match). We applied the environmental match hypothesis to examine whether a prenatal stress signal can dampen the effects of elevated water temperatures on body size, condition, and survival during early development in Chinook salmon <i>Oncorhynchus tshawytscha</i> from Lake Ontario, Canada. We exposed fertilized eggs to prenatal exogenous egg cortisol (1000ng*mL<sup>-1</sup> cortisol or 0ng*mL<sup>-1</sup> control) and then reared these dosed groups at temperatures indicative of current (+0°C) and future (+3°C) temperature conditions. Offspring reared in elevated temperatures were smaller and had a lower survival at the hatchling developmental stage. Overall, we found that our exogenous cortisol dose did not dampen effects of elevated rearing temperatures (environmental match) on body size or early survival. Instead, our eyed stage survival indicates that our prenatal cortisol dose may be detrimental, as cortisol-dosed offspring raised in elevated temperatures had lower survival than cortisol-dosed and control reared in current temperatures. Our results suggest that a maternal stress signal may not be able to ameliorate the effects of thermal stress during early development. However, we highlight the importance of interpreting the fitness impacts of maternal stress within an environmentally relevant context.</p>
Data from: Hair and plasma cortisol throughout the first three years of development in infant rhesus macaques, Macaca mulatta
<p>Cortisol expression has been demonstrated to have variation across development in rhesus macaques (Macaca mulatta). There exists contradictory evidence for the nature of this change, and age at which it occurs, across biological sample types. Consequently, we lack a cohesive understanding for cortisol concentrations across the development of a major human health translational model. We examined hair cortisol concentrations over the first three years of life for 49 mother-reared infant macaques from mixed-sex outdoor units at the California National Primate Research Center. For 48 of these subjects at infancy, one year, and two years, we obtained plasma cortisol samples for: response to a stressor, adjustment to prolonged stress, and response to dexamethasone injection. Hair cortisol concentrations decreased dramatically between three and ten months, followed by relative stability up to the final sampling event at around 34 months of age. Plasma cortisol showed within-year consistency, and consistency between infancy and year one. We document variability in the infant plasma cortisol samples, especially in percent change between samples one and two. Our plasma cortisol results indicate that infants possess the physiological capacity to effectively inhibit the release of cortisol when stimulated, as effectively as later responses in juveniles. Age-related changes in hair cortisol parallel findings indicating a large decline in the weeks following postparturation.</p>
Short and long-term effects of endogenous cortisol on personality traits and behavioral syndromes
<p>Animals express consistent individual differences in some behaviours, termed animal personality but behaviours can also considerably vary within individuals, within minutes or hours, due to environmental stimuli. Consistent among-individual variation is often assumed to be mediated by hormonal mechanisms. Hormones are also involved in flexible and fast responses towards environmental stimuli. Even though basic mechanisms by which hormones regulate behaviours are known, much of the quantitative patterns underlying hormone-behaviour interactions within and among individuals, remain unclear. Here, we conducted two experiments to investigate the immediate, short-term effects of experimentally elevated cortisol titres on well-known animal personality traits (Experiment 1) and the potential long-term effects of such experimentally elevated cortisol titres (Experiment 2) in the medium-sized cavy (<em>Cavia aperea</em>). Therefore, we tested how personality traits related to stress-coping, novelty seeking and social behaviour react within hours towards elevated cortisol. In Experiment 2, we tested if a three-weeks elevation of cortisol affects the same personality traits after cessation of the hormone treatment. We investigated effects on the mean levels of behaviours, i.e., the personality type, the temporal consistency, i.e., repeatability and among-individual correlations of traits. In experiment 1, we found cortisol to lead to more aggressive behaviour and more passive stress-coping while other traits were unaffected. In experiment 2, we found no long-term persisting effects. Both measured hormones, cortisol and testosterone, showed correlations to several personality traits, these correlations were, however, unaffected by the cortisol treatment. Animals receiving the cortisol treatment showed higher repeatability, for one stress-coping trait and lower repeatability for testosterone concentration. Interestingly, sexes differed only in few mean trait expressions but showed different correlation structures across traits. Taken together, our data indicate that personality traits in adult individuals are very consistent and only react via short-term fluctuations towards internal hormonal signals.</p>
Dataset for Fish Plasma Cortisol Levels and System DO and pH in Experiments Where Fish were Exposed to Algicide IRI-160AA
<p>This dataset includes two files. The first is the plasma cortisol levels of fish exposed to algicide IRI-160AA, and the second file is the system dissolved oxygen (DO) and pH for fish tanks before and during exposure to the algicide.</p>
Experimental manipulation of perceived predation risk and cortisol generates contrasting trait trajectories in plastic crucian carp
<p>Most animals constitute potential prey and must respond appropriately to predator-mediated stress in order to survive. Numerous prey also adaptively tailor their response to the prevailing level of risk and stress imposed by their natural enemies, i.e. they adopt an inducible defence strategy. Predator exposure may activate the stress axis, and drive the expression of anti-predator traits that facilitate survival in a high-risk environment (the predation–stress hypothesis). Here, we quantified two key morphological anti-predator traits, body morphology and coloration in crucian carp following exposure (or not) to a predator (pike) as well as to experimental manipulation of physiological stress via implants containing either cortisol or a cortisol inhibitor. We found that predator-exposed fish expressed a deeper-bodied phenotype and darker body coloration as compared with non-exposed individuals. Skin analyses revealed that an increase in the amount of melanophores caused the dramatic colour change in predatorexposed fish. Increased melanization is costly, and the darker body coloration may act as an inducible defence against predation, via a conspicuous signal of the morphological defence or by crypsis towards dark environments and a nocturnal lifestyle. By contrast, the phenotype of individuals carrying cortisol implants did not mirror the phenotype of predator-exposed fish but instead exhibited opposite trajectories of trait change: a shallow-bodied morphology with a lighter body coloration as compared with sham-treated fish. The cortisol inhibitor did not influence the phenotype of fish i.e. neither body depth nor body coloration differed between this group and predator-exposed fish having a sham implant. However, our results illuminate a potential link between stress physiology and morphological defence expression.</p>
Data of "Poor repeatability of cortisol responses to adrenocorticotropic hormone (ACTH) in beef heifers: is the ACTH challenge a suitable measure for stress research in cattle?"
<p>Data for article "Poor repeatability of cortisol responses to adrenocorticotropic hormone (ACTH) in beef heifers: is the ACTH challenge a suitable measure for stress research in cattle?" Dataset of 64 crossbred beef heifers which were subjected to three ACTH challenges. Both experimental independent variables (animal id, horn status, replicate, time of day of the ACTH challenge, ACTH challenge number) and post-ACTH salivary cortisol concentrations (at the seven sampling timepoints and area under the curve values) are presented.</p>
The Effect of Aromatherapy on Neonatal Abstinence Syndrome and Salivary Cortisol Levels
ClinicalTrials.gov study NCT03097484. IPD Sharing: NO. Countries: 1. Publications: 17.
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