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https://www.readbyqxmd.com/read/28089708/hair-corticosterone-measurement-in-mouse-models-of-type-1-and-type-2-diabetes-mellitus
#1
Rebecca L Erickson, Caroline A Browne, Irwin Lucki
In diabetes, glucocorticoid secretion increases secondary to hyperglycemia and is associated with an extensive list of disease complications. Levels of cortisol in humans, or corticosterone in rodents, are usually measured as transitory biomarkers of stress in blood or saliva. Glucocorticoid concentrations accumulate in human or animal hair over weeks and could more accurately measure the cumulative stress burden of diseases like chronic diabetes. In this study, corticosterone levels were measured in hair in verified rodent models of diabetes mellitus...
January 12, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28073999/everyday-support-to-aging-parents-links-to-middle-aged-children-s-diurnal-cortisol-and-daily-mood
#2
Lauren R Bangerter, Yin Liu, Kyungmin Kim, Steven H Zarit, Kira S Birditt, Karen L Fingerman
PURPOSE OF THE STUDY: Middle-aged adults are often called upon to support aging parents. However, providing support to an aging parent with health problems and disability may be a stressful experience. This study asked whether giving everyday support to parents in the context of health problems and disability has implications for middle-aged children's diurnal cortisol and daily mood. DESIGN AND METHODS: During four consecutive days, 148 middle-aged adults (mean age = 55) reported the support they gave to their parents and provided saliva 4 times a day (wake, 30 min post-wake, lunchtime, and bedtime)...
January 9, 2017: Gerontologist
https://www.readbyqxmd.com/read/28073304/the-impact-of-stress-on-odor-perception
#3
Matthias Hoenen, Oliver T Wolf, Bettina M Pause
The olfactory system and emotional systems are highly intervened and share common neuronal structures. The current study investigates whether emotional (e.g., anger and fear) and physiological (saliva cortisol) stress responses are associated with odor identification ability and hedonic odor judgments (intensity, pleasantness, and unpleasantness). Nineteen men participated in the modified Trier Social Stress Test (TSST) and a control session (cycling on a stationary bike). The physiological arousal was similar in both sessions...
January 1, 2017: Perception
https://www.readbyqxmd.com/read/28068807/annals-express-measuring-cortisol-in-serum-urine-and-saliva-are-our-assays-good-enough
#4
Nadia El-Farhan, D Aled Rees, Carol Evans
Cortisol is a steroid hormone produced in response to stress. It is essential for maintaining health and well-being; and leads to significant morbidity when deficient or present in excess. It is lipophillic and is transported bound to cortisol-binding globulin (CBG) and albumin; a small fraction (~10%) of total serum cortisol is unbound and biologically active. Serum cortisol assays measure total cortisol and their results can be misleading in patients with altered serum protein concentrations. Automated immunoassays are used to measure cortisol but lack specificity and show significant interassay differences...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/28064085/cortisol-awakening-response-is-blunted-and-pain-perception-is-increased-during-menses-in-cyclic-women
#5
Tuba Ozgocer, Cihat Ucar, Sedat Yildiz
BACKGROUND AND AIMS: The incidence of menstrual symptoms is reported to be as high as 90% in cyclic women. These symptoms, including anxiety and pain, might be associated with cortisol, as its receptors are widely distributed in the brain areas associated with behavior. Therefore, the current study aimed to assess the cortisol awakening response (CAR) throughout the menstrual cycle and correlate it with pain perception and trait anxiety. MATERIALS AND METHODS: CAR was assessed by measuring salivary cortisol at 0, 15, 30, and 60min following awakening in the same women (n=59, age 22...
December 21, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28056410/role-of-bdnf-val66met-polymorphism-in-modulating-exercised-induced-emotional-memories
#6
Dharani Keyan, Richard A Bryant
Brief physical exercise enhances memories for neutral events, and modulates fear learning in animals. Exercise-induced arousal induces the release of brain-derived neurotrophic factor (BDNF), which may moderate memory-enhancing effects. This study investigated the effect of exercise, and the extent to which the BDNF val66met polymorphism (which limits BDNF activity-dependent secretion) influenced emotional memories. Sixty-two healthy participants were randomly assigned to either 10min of intense exercise (n=31) or slow walking (control condition; n=31), and then immediately viewed positive and negative images...
December 21, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28054380/perceived-stress-recurrent-pain-and-aggregate-salivary-cortisol-measures-in-mid-adolescent-girls-and-boys
#7
Petra Lindfors, Lisa Folkesson Hellstadius, Viveca Östberg
Measures of perceived stress have been criticized for theoretical inconsistency. However, the validated pressure activation stress scale has been suggested as a theoretically sound alternative. But it is unclear how pressure and activation stress relate to objective and subjective measures including commonly used aggregate cortisol measures and health complaints respectively. Specifically, this study aimed at investigating how pressure and activation stress were related to aggregate salivary cortisol measures and recurrent pain in mid-adolescent girls and boys...
February 2017: Scandinavian Journal of Psychology
https://www.readbyqxmd.com/read/28050904/paper-based-analytical-biosensor-chip-designed-from-graphene-nanoplatelet-amphiphilic-di-block-co-polymer-composite-for-cortisol-detection-in-human-saliva
#8
Muhammad Khan, Santosh K Misra, Zhen Wang, Enrique A Daza, Aaron Schwartz-Duval, Joseph Kus, Debanjan Pan, Dipanjan Pan
Cortisol has been identified as a biomarker in saliva to monitor psychological stress. In this work, we report label-free paper-based electrical biosensor chip to quantify salivary cortisol at a point-of-care (POC) level. A high specificity of the sensor chip to detect cortisol with detection limit of 3 pg/mL was achieved by conjugating anti-cortisol antibody (anti-CAB) on top of gold (Au) microelectrodes using 3,3'-Dithiodipropionic acid di(N-hydroxysuccinimide ester (DTSP) - as self-assembled monolayer (SAM) agent...
January 4, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28050886/evaluation-of-cortisol-and-telomere-length-measurements-in-ethnically-diverse-women-with-breast-cancer-using-culturally-sensitive-methods
#9
Julio Ramirez, May Elmofty, Esperanza Castillo, Mindy DeRouen, Salma Shariff-Marco, Laura Allen, Scarlett Lin Gomez, Anna María Nápoles, Leticia Márquez-Magaña
The under-representation of ethnic minority participants, who are more likely to be socially disadvantaged in biomedical research, limits generalizability of results and reductions in health disparities. To facilitate investigations of how social disadvantage "gets under the skin," this pilot study evaluated low-intensity methods for collecting hair and saliva samples from multiethnic breast cancer survivors (N = 70) and analysis of biomarkers of chronic stress (cortisol levels) and biological age (telomere length)...
January 3, 2017: Journal of Community Genetics
https://www.readbyqxmd.com/read/28049540/catestatin-and-vasostatin-concentrations-in-healthy-dogs
#10
Thanikul Srithunyarat, Ragnvi Hagman, Odd V Höglund, Ulf Olsson, Mats Stridsberg, Supranee Jitpean, Anne-Sofie Lagerstedt, Ann Pettersson
BACKGROUND: The neuroendocrine glycoprotein chromogranin A is a useful biomarker in humans for neuroendocrine tumors and stress. Chromogranin A can be measured in both blood and saliva. The objective of this study was to investigate concentrations of and correlation between the chromogranin A epitopes catestatin and vasostatin in healthy dogs accustomed to the sample collection procedures. Blood and saliva samples were collected from 10 research Beagle dogs twice daily for 5 consecutive days, and from 33 privately-owned blood donor dogs in association with 50 different blood donation occasions...
January 3, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28027684/associations-between-circadian-and-stress-response-cortisol-in-children
#11
Sterre S H Simons, Antonius H N Cillessen, Carolina de Weerth
Hypothalamic-pituitary-adrenal (HPA) axis functioning is characterized by the baseline production of cortisol following a circadian rhythm, as well as by the superimposed production of cortisol in response to a stressor. However, it is relatively unknown whether the basal cortisol circadian rhythm is associated with the cortisol stress response in children. Since alterations in cortisol stress responses have been associated with mental and physical health, this study investigated whether the cortisol circadian rhythm is associated with cortisol stress responses in 6-year-old children...
December 27, 2016: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28010148/bone-health-of-the-ovahimba-people-of-north-western-namibia-in-the-context-of-urbanization-and-a-change-of-the-sociocultural-environment
#12
Anneke Wilhelm, Peyman Hadji, Mark Münzel, Hanna Daniel, Stephan Flache, Peter Nyarango, Peter Herbert Kann
The prevalence of osteoporosis in Sub-Saharan African (SSA) countries is low, however, as urbanization takes root, it is predicted that bone health will decrease dramatically. The bone health of the semi-nomadic Ovahimba people of Namibia was investigated in the context of urbanization and changes of the sociocultural environment. Furthermore, data on bone health in SSA countries is scarce; there exists no ethnic-specific reference group for people of black origin. Included in the study were 98 urban and rural living Ovahimba people...
December 23, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28009530/maternal-cortisol-during-pregnancy-and-infant-adiposity-a-prospective-investigation
#13
Sonja Entringer, Claudia Buss, Jerod M Rasmussen, Karen Lindsay, Daniel L Gillen, Dan M Cooper, Pathik D Wadhwa
CONTEXT: Glucocorticoids play a key role during intrauterine development in cellular growth and differentiation. Evidence suggests that exposure to inappropriate concentrations of glucocorticoids during sensitive developmental periods may produce alterations in physiological systems that impact obesity risk. OBJECTIVE: To elucidate the magnitude and stage-of-gestation specific association of maternal cortisol concentrations during pregnancy with infant adiposity...
December 23, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28002634/fkbp5-polymorphisms-influence-pre-learning-stress-induced-alterations-of-learning-and-memory
#14
Phillip R Zoladz, Alison M Dailey, Hannah E Nagle, Miranda K Fiely, Brianne E Mosley, Callie M Brown, Tessa J Duffy, Amanda R Scharf, McKenna B Earley, Boyd R Rorabaugh
FK506 binding protein 51(FKBP5) is a co-chaperone of heat shock protein 90 and significantly influences glucocorticoid receptor sensitivity. Single nucleotide polymorphisms (SNPs) in the FKBP5 gene are associated with altered hypothalamus-pituitary-adrenal (HPA) axis function, changes in the structure and function of several cognitive brain areas, and increased susceptibility to post-traumatic stress disorder, major depression, bipolar disorder, and suicidal events. The mechanisms underlying these associations are largely unknown, but it has been speculated that the influence of these SNPs on emotional memory systems may play a role...
December 21, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27998757/intraindividual-stability-of-cortisol-and-cortisone-and-the-ratio-of-cortisol-to-cortisone-in-saliva-urine-and-hair
#15
Quan Zhang, Zheng Chen, Shenghuo Chen, Youyun Xu, Huihua Deng
BACKGROUND: Cortisol, cortisone and the ratio of cortisol to cortisone in saliva, urine and hair are acute, short-term and long-term biomarkers to reliably assess the activity of hypothalamic-pituitary-adrenal (HPA) axis and 11β-hydroxysteroid dehydrogenase (11β-HSD). One key issue is whether these biomarkers have intraindividual relative stability. Salivary, urinary and hair cortisol was proven to show considerable long-term intraindividual relative stability. However, currently unknown is whether cortisone and the ratio in saliva, urine and hair show intraindividual relative stability...
December 18, 2016: Steroids
https://www.readbyqxmd.com/read/27997348/relationship-between-plasma-and-salivary-melatonin-and-cortisol-investigated-by-lc-ms-ms
#16
Martijn van Faassen, Rainer Bischoff, Ido P Kema
BACKGROUND: Disturbance of the circadian rhythm has been associated with disease states, such as metabolic disorders, depression and cancer. Quantification of the circadian markers such as melatonin and cortisol critically depend on reliable and reproducible analytical methods. Previously, melatonin and cortisol were primarily analyzed separately, mainly using immunoassays. METHODS: Here we describe the validation and application of a high-throughput liquid chromatography in combination with mass spectrometry (LC-MS/MS) method for the combined analysis of melatonin and cortisol in plasma and saliva...
December 20, 2016: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/27995329/stress-hormones-and-posttraumatic-stress-symptoms-following-paediatric-critical-illness-an-exploratory-study
#17
REVIEW
Lorraine C Als, Maria D Picouto, Kieran J O'Donnell, Simon Nadel, Mehrengise Cooper, Christine M Pierce, Tami Kramer, Vivette A S Glover, M Elena Garralda
In this exploratory case-control study, we investigated basal cortisol regulation in 5-16-year-old children, 3-6 months following PICU (paediatric intensive care) admission. This was nested within a study of child psychological and cognitive function; 47 children were assessed alongside 56 healthy controls. Saliva samples were collected three times per day (immediately after waking, waking +30 min, and waking +12 h) over two consecutive weekdays. In addition, data on posttraumatic stress symptoms were ascertained from 33 PICU admitted children using the Impact of Events Scale-8 (IES-8)...
December 19, 2016: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/27989492/a-statistical-method-to-calculate-blood-contamination-in-the-measurement-of-salivary-hormones-in-healthy-women
#18
Guilherme A Behr, Jay P Patel, Marg Coote, Jose C F Moreira, Daniel P Gelain, Meir Steiner, Benicio N Frey
OBJECTIVES: Previous studies have reported that salivary concentrations of certain hormones correlate with their respective serum levels. However, most of these studies did not control for potential blood contamination in saliva. In the present study we developed a statistical method to test the amount of blood contamination that needs to be avoided in saliva samples for the following hormones: cortisol, estradiol, progesterone, testosterone and oxytocin. DESIGN & METHODS: Saliva and serum samples were collected from 38 healthy, medication-free women (mean age=33...
December 16, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27984355/the-prospective-association-of-the-diurnal-cortisol-rhythm-with-sleep-duration-and-perceived-sleeping-problems-in-pre-schoolers-the-generation-r-study
#19
Nathalie S Saridjan, Desana Kocevska, Maartje P C M Luijk, Vincent W V Jaddoe, Frank C Verhulst, Henning Tiemeier
OBJECTIVE: Cortisol, the end-product of the hypothalamic-pituitary-adrenal (HPA) axis, plays an important role in modulating sleep. Yet, studies investigating the association between diurnal cortisol rhythm and sleep patterns in young children are scarce. We tested the hypothesis that the diurnal cortisol rhythm is associated with shorter sleep duration and more sleep problems across early childhood. METHODS: This study was embedded in Generation R, a population-based cohort from fetal life onwards...
December 15, 2016: Psychosomatic Medicine
https://www.readbyqxmd.com/read/27982510/stress-system-dysregulation-in-pediatric-generalized-anxiety-disorder-associated-with-comorbid-depression
#20
R Funke, A Eichler, J Distler, Y Golub, O Kratz, G H Moll
Because chronic stress is an important risk factor for anxiety states and depressive disorders, we studied hypothalamus-pituitary-adrenal (HPA) axis and sympathetic system activity via changes in cortisol and alpha amylase activity levels in pediatric generalized anxiety disorder (GAD) patients (n = 26) with comorbid depression and a healthy comparison group (n = 26). Morning plasma cortisol and diurnal profiles of salivary cortisol and salivary alpha amylase (sAA) activity were assessed, also reactivity of HPA-axis, sAA activity, and heart rate following a psychosocial stressor (Trier Social Stress Test for children)...
December 16, 2016: Stress and Health: Journal of the International Society for the Investigation of Stress
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