Differential Adrenocortical Stress Responses in Naval Aviators during Aircraft Carrier Landing Practice

1970 ◽  
Vol 26 (1) ◽  
pp. 71-74 ◽  
Author(s):  
Robert T. Rubin ◽  
Robert G. Miller ◽  
Ransom J. Arthur ◽  
Brian R. Clark
Keyword(s):  
Stress Intensity ◽  
Stress Response ◽  
Stress Responses ◽  
Serum Cortisol ◽  
Aircraft Carrier ◽  
Naturally Occurring ◽  
Cortisol Levels ◽  
Naval Aviators ◽  
Adrenocortical Stress Response

Serum Cortisol levels were measured in 9 Navy pilots and their flight officers during aircraft carrier landing practice in the two-man F-4B jet aircraft. The pilots showed an unequivocal adrenocortical stress response; the flight officers did not. The complex and hazardous task of carrier landing appears to be a considerably greater stress on the “executive” naval aviator (the pilot in control of the aircraft) than on his passive partner, although both are exposed to the same dangers. The findings of this study highlight the importance of the active versus the passive role as a determinant of stress intensity in human Ss exposed to naturally occurring stress situations.

scholarly journals Adrenocortical stress responses influence an invasive vertebrate's fitness in an extreme environment

2013 ◽  
Vol 280 (1768) ◽  
pp. 20131444 ◽  
Author(s):  
Tim S. Jessop ◽  
Mike Letnic ◽  
Jonathan K. Webb ◽  
Tim Dempster
Keyword(s):  
Invasive Species ◽  
Stress Response ◽  
Stress Responses ◽  
Range Expansion ◽  
Physiological Stress ◽  
Extreme Environments ◽  
Extreme Environment ◽  
Evaporative Water ◽  
Hot Dry Season ◽  
Adrenocortical Stress Response

Continued range expansion into physiologically challenging environments requires invasive species to maintain adaptive phenotypic performance. The adrenocortical stress response, governed in part by glucocorticoid hormones, influences physiological and behavioural responses of vertebrates to environmental stressors. However, any adaptive role of this response in invasive populations that are expanding into extreme environments is currently unclear. We experimentally manipulated the adrenocortical stress response of invasive cane toads ( Rhinella marina ) to investigate its effect on phenotypic performance and fitness at the species' range front in the Tanami Desert, Australia. Here, toads are vulnerable to overheating and dehydration during the annual hot–dry season and display elevated plasma corticosterone levels indicative of severe environmental stress. By comparing unmanipulated control toads with toads whose adrenocortical stress response was manipulated to increase acute physiological stress responsiveness, we found that control toads had significantly reduced daily evaporative water loss and higher survival relative to the experimental animals. The adrenocortical stress response hence appears essential in facilitating complex phenotypic performance and setting fitness trajectories of individuals from invasive species during range expansion.

scholarly journals Comparison of morphine and fentanyl in attenuation of Intra operative stress response under general anesthesia: A randomized double blinded study

2014 ◽  
Vol 5 (4) ◽  
pp. 65-68
Author(s):  
R Krishna Prabu ◽  
P Rani ◽  
NP Madhu
Keyword(s):  
Body Weight ◽  
Stress Response ◽  
General Anesthesia ◽  
Elective Surgery ◽  
Serum Cortisol ◽  
Blood Samples ◽  
Significant Difference ◽  
Blinded Study ◽  
Cortisol Levels ◽  
Double Blinded

Background: This randomized double blinded study was done to compare the effect of intravenous morphine and fentanyl in attenuation of stress response during surgeries under general anesthesia in adults. The attenuation of stress response was analyzed with changes in serum cortisol and glucose levels one hour after induction of anesthesia. Methods: Fifty consented healthy volunteers in age group 20-50, under ASA I and ASA II posted for elective surgery were included in the study. Two groups of 25 each, group M who received 0.2 mg/kg body weight of morphine and group F who received 2 microgram/kg body weight of fentanyl before anaesthetic induction were compared. The members of two groups were randomly allocated and double blinded using sealed envelope technique. Blood samples were collected for baseline glucose and cortisol in all the subjects. One hour after the administration of study drugs, which was given at the time of induction blood samples were collected for analysis of glucose and cortisol. The changes in blood glucose and serum cortisol levels were compared at the end of the study using independent samples ‘t’ test. Results: There was no significant difference in blood sugar levels in both groups at the end of 1 hour. But there was significant increase in serum cortisol levels in group F compared to group M. Conclusion: This study concludes that morphine is better than fentanyl in attenuation of Intraoperative stress by effectively controlling serum cortisol levels. DOI: http://dx.doi.org/10.3126/ajms.v5i4.9796 Asian Journal of Medical Sciences 2014 Vol.5(4); 65-68

scholarly journals Effects of different sedatives/analgesics on stress responses in patients undergoing craniotomy and bone flap decompression

2021 ◽  
Vol 49 (12) ◽  
pp. 030006052110627
Author(s):  
Qingduo Guo ◽  
Meina Ma ◽  
Qiuying Yang ◽  
Hong Yu ◽  
Xupeng Wang ◽  
...  
Keyword(s):  
Stress Response ◽  
Stress Responses ◽  
Cerebral Hemorrhage ◽  
Serum Cortisol ◽  
Bone Flap ◽  
Spontaneous Respiration ◽  
Consciousness Disturbance ◽  
Post Operation ◽  
Sedation And Analgesia ◽  
Intravenous Medication

Objective To explore the effects of sedation and analgesia with dexmedetomidine and other drugs on the stress response in patients with cerebral hemorrhage after craniotomy hematoma removal and bone flap decompression and insertion of an indwelling endotracheal catheter. Methods A total of 180 patients with cerebral hemorrhage with consciousness disturbance who underwent emergency surgery were included in this study. They were divided into six groups treated with propofol, dexmedetomidine, lidocaine, sufentanil, dezocine, and remifentanil, respectively. Intravenous medication was given after recovery of spontaneous respiration, and stress responses were compared among the group. Results Serum concentrations of norepinephrine, epinephrine, and cortisol and systolic blood pressure were significantly correlated with drug treatment. Serum norepinephrine concentrations differed significantly among the groups, except between the sufentanil and propofol groups. There were significant differences in serum epinephrine concentrations among all groups, and significant differences in serum cortisol concentrations among all groups, except the propofol, dexmedetomidine, and lidocaine groups. Conclusion Dexmedetomidine can reduce the stress response in patients with intracerebral hemorrhage undergoing emergency craniotomy and bone flap decompression, and can reduce adverse events from an indwelling endotracheal catheter 3 hours post-operation.

scholarly journals SERUM-CORTISOL LEVELS IN SEVERITY OF STROKE

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Akshat Agarwal ◽  
Haroon Iqbaal
Keyword(s):  
Atrial Fibrillation ◽  
Ischemic Stroke ◽  
Stress Response ◽  
Acute Stroke ◽  
Cortisol Level ◽  
Serum Cortisol ◽  
Blood Samples ◽  
Significance Level ◽  
History Of ◽  
Cortisol Levels

Introduction: Cortisol, an important hormone in the hypothalamic pituitary adrenal axis, has important effects on the metabolism of glucose, protein and lipid[i]. A stress response consists of increased levels of cortisol and catecholamines in the 1st weeks after acute stroke. The cortisol response has been observed in cerebral infarction as well as in intracerebral haemorrhage. Change in serum level of cortisol has been reported in patients with ischemic stroke and studies reported that high levels of this hormone are independently associated with increase in ischemic lesion volume. Also it has been observed that cortisol level in patients with ischemic stroke is associated with significantly increased mortality rate. Increase in the circulating levels of catecholamines was shown in insular damage in experimental stroke suggesting this as a mechanism for the cardiac complications associated with stroke. Patients and Methods: All patients were included in the study who was admitted within 6 hours in the hospital after the episode of stroke. Scandinavian Stroke Scale (SSS)[ii] was monitored in all patients from admission. SSS was performed every 2 hours in the first 24 hours, every 4 hours in the next 48 hours and then daily up to day 7. Blood samples were obtained for routine investigation and estimation of serum cortisol. No patients had blood samples drawn for cortisol determination between 01:00 and 07:00 am. Results: Mean age was observed in the current series was 72.8 ± 12.54 years. There were 34 (53.1%) male and 30(46.9%) female. SSS was observed to be 36 (21-47) on admission. History of hypertension, History of stroke, Diabetes mellitus and Atrial fibrillation was observed in 38(59.4%), 12(18.8%), 24(37.5%) and 11(17.2%) respectively. In univariate logistic regression analysis of the relations to 7 days of mortality, s-cortisol, SSS on admission, and pulse rate reached a significance level. Age, atrial fibrillation, blood glucose, body temperature 12 h after stroke onset, and the presence of early infarctions signs did not reach a significance level of 0.1 in univariate testing. S-cortisol level was higher in patients with insular involvement, 635 nmol/l, in comparison to patients without insular involvement, 589 nmol/l. Conclusion: Adrenal glucocorticoid stress response in acute stroke is harmful. High cortisol levels are associated with the poor outcome and mortality of the patients with stroke. Keywords: Cortisol, HPA, Stroke, SSS

Stress responses of wapiti (Cervus elaphus canadensis) to removal of velvet antler

2002 ◽  
Vol 82 (1) ◽  
pp. 11-17 ◽  
Author(s):  
N. J. Cook ◽  
A. L. Schaefer
Keyword(s):  
Stress Response ◽  
Heat Loss ◽  
Cervus Elaphus ◽  
Stress Responses ◽  
Salivary Cortisol ◽  
Plasma Cortisol ◽  
Respiration Rates ◽  
Velvet Antler ◽  
Cortisol Levels ◽  
Assessment Of Stress

An assessment of stress responses of 27 mature wapiti (Cervus elaphus canadensis) stags was conducted to test the efficacy of two methods of analgesia to reduce stress responses associated with the pain of cutting velvet antler. Analgesic methods were a Lidocaine nerve block (LIDO) and pedicle placement electrical analgesia (EA). A control group of animals (CON) was included that did not receive analgesia. Methods of assessing stress responses included heart and respiration rates, differential white blood cell counts and plasma cortisol. Assessment of stress responses also utilized infrared thermographic imaging and measurement of salivary cortisol concentrations. The latter measures were novel approaches to stress assessment in wapiti, and, as such, the study was a trial of their applicability. Measures were conducted over 2 d. Antler was harvested on day 1 and the animals were brought back to the handling facility 24 h later (day 2) for repeated measures. Heart and respiration rates were increased in response to cutting antler (P < 0.05) and declined following antler removal (P < 0.003). Reductions in eosinophils occurred over a 24-h period in all treatments and were statistically significant for the EA treatment (P < 0.014). Plasma cortisol concentrations did not demonstrate statistical differences between either treatments or days. Plasma cortisol concentrations were numerically higher for the EA animals on days 1 and 2 than for either the CON or LIDO treatments. Plasma cortisol levels tended to be higher after capture and restraint on day 2 compared to levels recorded after antler removal on day 1. Salivary cortisol levels were higher on day 2 compared to day 1 (P < 0.004). Between treatments, CON animals exhibited higher salivary cortisol levels on day 2 than EA (P < 0.05) and LIDO (P < 0.002) animals. Radiated heat loss, measured by infrared thermography, was significantly elevated in response to velveting (P < 0.00001). Increased radiated heat loss was observed for all treatments and was statistically significant for EA (P < 0.006) and CON (P < 0.02), but not for LIDO (P < 0.06). The study demonstrated that the process of harvesting velvet antler from wapiti initiates a significant stress response similar to that of other animals during practices such as capture, handling and restraint. The data further suggest that stress responses to the above husbandry practices are exacerbated by the pain of cutting antler and that animals treated with Lidocaine for pain management exhibited a lesser stress response than CON or EA treated animals. Key words: Wapiti, velvet antler, analgesia, stress, salivary cortisol, infrared thermography

Platelet Function in Surgical Stress

1985 ◽  
Vol 54 (04) ◽  
pp. 849-852 ◽  
Author(s):  
O Naesh ◽  
J T Friis ◽  
I Hindberg ◽  
K Winther
Keyword(s):  
Stress Response ◽  
Negative Correlation ◽  
Surgical Stress ◽  
Plasma Concentrations ◽  
Serum Cortisol ◽  
Cortisol Concentration ◽  
Pulmonary Dysfunction ◽  
Arterial Po2 ◽  
Elective Cholecystectomy ◽  
Serum Cortisol Concentration

SummaryTen patients for elective cholecystectomy were studied pre-, per- and postoperatively. All had neurolept anesthesia. Plasma concentrations of β-TG, TXB2 and 5-HT and intraplatelet 5-HT were measured. Aggregation to ADP was recorded.Serum cortisol concentration was used as index of the stress response, showing peroperative increase and postoperative decrease. Closely related to this we observed a significant increase in P-β-TG and P-TXB2 with postoperative normalization in 6 patients without complications. P-5-HT had a peak peropera-tively and remained elevated postoperatively. A negative correlation between P--5-HT and decreasing intraplatelet 5-HT postoperatively was observed.High postoperative levels of P--5-HT seem to be related to low arterial Po2 and pulmonary dysfunction. In 3 patients with complications a second increase in P-β-TG, P-TXB2 and partly in P--5-HT was found. Platelets were temporarily refractory to ADP immediately following surgery and showed increased aggregabil-ity postoperatively. We conclude that platelets are activated in surgical stress.

scholarly journals Flavonoids: Potential Candidates for the Treatment of Neurodegenerative Disorders

Biomedicines ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 99
Author(s):  
Shweta Devi ◽  
Vijay Kumar ◽  
Sandeep Kumar Singh ◽  
Ashish Kant Dubey ◽  
Jong-Joo Kim
Keyword(s):  
Stress Response ◽  
Stress Responses ◽  
Neurodegenerative Disorders ◽  
Cell Damage ◽  
Cellular Stress ◽  
Clinical Manifestations ◽  
Cellular Stress Response ◽  
Dramatic Rise ◽  
Cellular Stress Responses

Neurodegenerative disorders, such as Parkinson’s disease (PD), Alzheimer’s disease (AD), Amyotrophic lateral sclerosis (ALS), and Huntington’s disease (HD), are the most concerning disorders due to the lack of effective therapy and dramatic rise in affected cases. Although these disorders have diverse clinical manifestations, they all share a common cellular stress response. These cellular stress responses including neuroinflammation, oxidative stress, proteotoxicity, and endoplasmic reticulum (ER)-stress, which combats with stress conditions. Environmental stress/toxicity weakened the cellular stress response which results in cell damage. Small molecules, such as flavonoids, could reduce cellular stress and have gained much attention in recent years. Evidence has shown the potential use of flavonoids in several ways, such as antioxidants, anti-inflammatory, and anti-apoptotic, yet their mechanism is still elusive. This review provides an insight into the potential role of flavonoids against cellular stress response that prevent the pathogenesis of neurodegenerative disorders.

scholarly journals Ambient air pollutants are associated with morning serum cortisol in overweight and obese Latino youth in Los Angeles

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
C. M. Toledo-Corral ◽  
T. L. Alderete ◽  
M. M. Herting ◽  
R. Habre ◽  
A. K. Peterson ◽  
...  
Keyword(s):  
Hpa Axis ◽  
Air Pollutants ◽  
Latino Youth ◽  
Serum Cortisol ◽  
Ambient Air ◽  
Pubertal Status ◽  
Ambient Air Pollutants ◽  
Morning Cortisol ◽  
Morning Serum Cortisol ◽  
Cortisol Levels

Abstract Background Hypothalamic-pituitary-adrenal (HPA)-axis dysfunction has been associated with a variety of mental health and cardio-metabolic disorders. While causal models of HPA-axis dysregulation have been largely focused on either pre-existing health conditions or psychosocial stress factors, recent evidence suggests a possible role for central nervous system activation via air pollutants, such as nitrogen dioxide (NO2), ozone (O3) and particulate matter (PM). Therefore, in an observational study of Latino youth, we investigated if monthly ambient NO2, O3, and PM with aerodynamic diameter ≤ 2.5 (PM2.5) exposure were associated with morning serum cortisol levels. Methods In this cross-sectional study, morning serum cortisol level was assessed after a supervised overnight fast in 203 overweight and obese Latino children and adolescents (female/male: 88/115; mean age: 11.1 ± 1.7 years; pre-pubertal/pubertal/post-pubertal: 85/101/17; BMI z-score: 2.1 ± 0.4). Cumulative concentrations of NO2, O3 and PM2.5 were spatially interpolated at the residential addresses based on measurements from community monitors up to 12 months prior to testing. Single and multi-pollutant linear effects models were used to test the cumulative monthly lag effects of NO2, O3, and PM2.5 on morning serum cortisol levels after adjusting for age, sex, seasonality, social position, pubertal status, and body fat percent by DEXA. Results Single and multi-pollutant models showed that higher O3 exposure (derived from maximum 8-h exposure windows) in the prior 1–7 months was associated with higher serum morning cortisol (p < 0.05) and longer term PM2.5 exposure (4–10 months) was associated with lower serum morning cortisol levels (p < 0.05). Stratification by pubertal status showed associations in pre-pubertal children compared to pubertal and post-pubertal children. Single, but not multi-pollutant, models showed that higher NO2 over the 4–10 month exposure period associated with lower morning serum cortisol (p < 0.05). Conclusions Chronic ambient NO2, O3 and PM2.5 differentially associate with HPA-axis dysfunction, a mechanism that may serve as an explanatory pathway in the relationship between ambient air pollution and metabolic health of youth living in polluted urban environments. Further research that uncovers how ambient air pollutants may differentially contribute to HPA-axis dysfunction are warranted.

scholarly journals Environmental Conditions Modulate the Transcriptomic Response of Both Caulobacter crescentus Morphotypes to Cu Stress

2021 ◽  
Vol 9 (6) ◽  
pp. 1116
Author(s):  
Laurens Maertens ◽  
Pauline Cherry ◽  
Françoise Tilquin ◽  
Rob Van Houdt ◽  
Jean-Yves Matroule
Keyword(s):  
Oxidative Stress ◽  
Stress Response ◽  
Stress Responses ◽  
Caulobacter Crescentus ◽  
Oxidative Stress Response ◽  
Transport Systems ◽  
Transcriptomic Response ◽  
Swarmer Cell ◽  
Cu Stress ◽  
Cellular Environment

Bacteria encounter elevated copper (Cu) concentrations in multiple environments, varying from mining wastes to antimicrobial applications of copper. As the role of the environment in the bacterial response to Cu ion exposure remains elusive, we used a tagRNA-seq approach to elucidate the disparate responses of two morphotypes of Caulobacter crescentus NA1000 to moderate Cu stress in a complex rich (PYE) medium and a defined poor (M2G) medium. The transcriptome was more responsive in M2G, where we observed an extensive oxidative stress response and reconfiguration of the proteome, as well as the induction of metal resistance clusters. In PYE, little evidence was found for an oxidative stress response, but several transport systems were differentially expressed, and an increased need for histidine was apparent. These results show that the Cu stress response is strongly dependent on the cellular environment. In addition, induction of the extracytoplasmic function sigma factor SigF and its regulon was shared by the Cu stress responses in both media, and its central role was confirmed by the phenotypic screening of a sigF::Tn5 mutant. In both media, stalked cells were more responsive to Cu stress than swarmer cells, and a stronger basal expression of several cell protection systems was noted, indicating that the swarmer cell is inherently more Cu resistant. Our approach also allowed for detecting several new transcription start sites, putatively indicating small regulatory RNAs, and additional levels of Cu-responsive regulation.

Sign in / Sign up

Export Citation Format

Share Document