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Stress: the International Journal on the Biology of Stress

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https://www.readbyqxmd.com/read/28482730/buccal-telomere-length-and-its-associations-with-cortisol-heart-rate-variability-heart-rate-and-blood-pressure-responses-to-an-acute-social-evaluative-stressor-in-college-students
#1
Alex Woody, Katrina Hamilton, Irina E Livitz, Wilson S Figueroa, Peggy M Zoccola
Understanding the relationship between stress and telomere length (a marker of cellular aging) is of great interest for reducing aging-related disease and death. One important aspect of acute stress exposure that may underlie detrimental effects on health is physiological reactivity to the stressor. The current study tested the relationship between buccal telomere length and physiological reactivity (salivary cortisol reactivity and total output, heart rate variability, blood pressure, and heart rate) to an acute psychosocial stressor in a sample of 77 (53% male) healthy young adults...
May 8, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28462597/acute-stress-in-residents-during-emergency-care-a-study-of-personal-and-situational-factors
#2
Roger Daglius Dias, Augusto Scalabrini Neto
Providing care for simulated emergency patients may induce considerable acute stress in physicians. However, the acute stress provoked in a real-life emergency room is not well known. Our aim was to assess acute stress responses in residents during real emergency care and investigate the related personal and situational factors. A cross-sectional observational study was carried out at an emergency department of a tertiary teaching hospital. All second-year internal medicine residents were invited to voluntarily participate in this study...
May 2, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28460556/adrenal-gland-plasticity-in-lactating-rats-and-mice-is-sufficient-to-maintain-basal-hypersecretion-of-corticosterone
#3
Clara V Perani, Dominik Langgartner, Nicole Uschold-Schmidt, Andrea M Füchsl, Inga D Neumann, Stefan O Reber, David A Slattery
Increased basal glucocorticoid secretion and a reduced glucocorticoid response during acute stress, despite only minor changes in the secretion of the major secretagogue adrenocorticotropic hormone (ACTH), have been documented in the peripartum period in several species. We recently showed that the adrenal gland, the site of glucocorticoid synthesis, undergoes substantial post partum-associated plasticity in the rat at mid-lactation. Here, we asked the question whether adrenal changes take place already around parturition in the rat and in another species, namely the mouse...
May 2, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28446047/effect-of-chronic-restraint-stress-on-inhibitory-gating-in-the-auditory-cortex-of-rats
#4
Lanlan Ma, Wai Li, Sibin Li, Xuejiao Wang, Ling Qin
A fundamental adaptive mechanism of auditory function is inhibitory gating (IG), which refers to the attenuation of neural responses to repeated sound stimuli. IG is drastically impaired in individuals with emotional and cognitive impairments (i.e., posttraumatic stress disorder). The objective of this study was to test whether chronic stress impairs the IG of the auditory cortex (AC). We used the standard two-tone stimulus paradigm and examined the parametric qualities of IG in the AC of rats by recording the electrophysiological signals of a single-unit and local field potential (LFP) simultaneously...
April 26, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28436309/corticotropin-releasing-hormone-binding-protein-and-stress-from-invertebrates-to-humans
#5
Kyle D Ketchesin, Gwen S Stinnett, Audrey F Seasholtz
Corticotropin-releasing hormone (CRH) is a key regulator of the stress response. This peptide controls the hypothalamic-pituitary adrenal (HPA) axis as well as a variety of behavioral and autonomic stress responses via the two CRH receptors, CRH-R1 and CRH-R2. The CRH system also includes an evolutionarily conserved CRH-binding protein (CRH-BP), a secreted glycoprotein that binds CRH with subnanomolar affinity to modulate CRH receptor activity. In this review, we discuss the current literature on CRH-BP and stress across multiple species, from insects to humans...
April 23, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28347187/second-trimester-amniotic-fluid-corticotropin-releasing-hormone-and-urocortin-in-relation-to-maternal-stress-and-fetal-growth-in-human-pregnancy
#6
Pearl La Marca-Ghaemmaghami, Sara M Dainese, Günter Stalla, Marina Haller, Roland Zimmermann, Ulrike Ehlert
This study explored the association between the acute psychobiological stress response, chronic social overload and amniotic fluid corticotropin-releasing hormone (CRH) and urocortin (UCN) in 34 healthy, second-trimester pregnant women undergoing amniocentesis. The study further examined the predictive value of second-trimester amniotic fluid CRH and UCN for fetal growth and neonatal birth outcome. The amniocentesis served as a naturalistic stressor, during which maternal state anxiety and salivary cortisol was measured repeatedly and an aliquot of amniotic fluid was collected...
April 21, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28412873/%C3%AE-3-adrenergic-receptors-adipokines-and-neuroendocrine-activation-during-stress-induced-by-repeated-immune-challenge-in-male-and-female-rats
#7
Agnesa Csanova, Natasa Hlavacova, Malgorzata Hasiec, Michal Pokusa, Barbora Prokopova, Daniela Jezova
The main hypothesis of the study is that stress associated with repeated immune challenge has an impact on β3-adrenergic receptor gene expression in the brain. Sprague-Dawley rats were intraperitoneally injected with increasing doses of lipopolysaccharide (LPS) for 5 consecutive days. LPS treatment was associated with body weight loss and increased anxiety-like behavior. In LPS-treated animals of both sexes, β3-receptor gene expression was increased in the prefrontal cortex but not the hippocampus. LPS treatment decreased β3-receptor gene expression in white adipose tissue with higher values in males compared to females...
April 16, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28367664/passive-adaptation-to-stress-in-adulthood-after-short-term-social-instability-stress-during-adolescence-in-mice
#8
A P N de Lima, C O Massoco Salles Gomes
This study reports that short-term social instability stress in adolescence increases passive-coping in adulthood in male mice. Short-term SIS decreased the latency of immobility and increased the frequency and time of immobility in tail suspension test. These findings support the hypothesis that adolescent stress can induce a passive adaptation to stress in adulthood, even if it is a short period of stress.
April 2, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28287019/effect-of-prenatal-restraint-stress-and-morphine-co-administration-on-plasma-vasopressin-concentration-and-anxiety-behaviors-in-adult-rat-offspring
#9
Elnaz Nakhjiri, Ehsan Saboory, Shiva Roshan-Milani, Yousef Rasmi, Davod Khalafkhani
Stressful events and exposure to opiates during gestation have important effects on the later mental health of the offspring. Anxiety is among the most common mental disorders. The present study aimed to identify effects of prenatal restraint stress and morphine co-administration on plasma vasopressin concentration (PVC) and anxiety behaviors in rats. Pregnant rats were divided into four groups (n = 6, each): saline, morphine, stress + saline and stress + morphine treatment. The stress procedure consisted of restraint twice per day, two hours per session, for three consecutive days starting on day 15 of pregnancy...
March 28, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28264636/mothers-parenting-stress-is-associated-with-salivary-cortisol-profiles-in-children-with-attention-deficit-hyperactivity-disorder
#10
Terpsichori Korpa, Panagiota Pervanidou, Eleni Angeli, Filia Apostolakou, Katerina Papanikolaou, Ioannis Papassotiriou, George P Chrousos, Gerasimos Kolaitis
The aim of this study was to explore the relation between mothers' parenting stress and the functioning of the hypothalamic-pituitary-adrenal axis (HPAA), as expressed by daily salivary cortisol concentrations, in their children diagnosed with attention deficit hyperactivity disorder (ADHD). Seventy-five children aged 6-11 years diagnosed with ADHD predominant hyperactive-impulsive/combined (ADHD-HI/C, N = 49) and inattentive symptoms (ADHD-I, N = 26) and 45 healthy peers and their mothers participated in the study...
March 28, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28270027/hair-cortisol-concentrations-exhibit-a-positive-association-with-salivary-cortisol-profiles-and-are-increased-in-obese-prepubertal-girls
#11
Chrysanthe Papafotiou, Eirini Christaki, Erica L T van den Akker, Vincent L Wester, Filia Apostolakou, Ioannis Papassotiriou, George P Chrousos, Panagiota Pervanidou
Cortisol, a key mediator of the stress response, has been associated with obesity and metabolic syndrome manifestations as early as in childhood. Scalp hair cortisol has been proposed as a reliable index of long-term circulating cortisol. We aimed to investigate whether obese prepubertal girls have higher scalp hair cortisol than normal-weight controls and whether hair cortisol levels are correlated with salivary cortisol concentrations in these groups. In this cross-sectional study, 25 obese girls and 25 normal-weighted, age-matched girls were enrolled...
March 23, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28322068/greater-avoidance-behavior-in-individuals-with-posttraumatic-stress-disorder-symptoms
#12
Jony Sheynin, Christine Shind, Milen Radell, Yasheca Ebanks-Williams, Mark W Gilbertson, Kevin D Beck, Catherine E Myers
While avoidance is a core symptom of PTSD, little is known about whether individuals with PTSD show a general cognitive bias to acquire and express avoidance, in situations not related to trauma or fear. Here, we used a computer-based task to examine operant acquisition and extinction of avoidance in participants with and without severe self-reported PTSD symptoms. A total of 119 participants (77 male, 42 female; 74 veteran, 45 civilian) with symptoms (PTSS; n = 63) or with few/no symptoms (noPTSS; n = 56) performed a task, in which they controlled a spaceship and could shoot a target to gain points or hide in "safe areas" to escape or avoid on-screen aversive events...
March 21, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28320257/academic-stress-disrupts-cortical-plasticity-in-graduate-students
#13
Carmen Concerto, Dhaval Patel, Carmenrita Infortuna, Eileen Chusid, Maria R Muscatello, Antonio Bruno, Rocco Zoccali, Eugenio Aguglia, Fortunato Battaglia
Medical education is a time of high stress and anxiety for many graduate students in medical professions. In this study, we sought to investigate the effect of academic stress on cortical excitability and plasticity by using transcranial magnetic stimulation (TMS). We tested two groups (n = 13 each) of healthy graduate medical students (mean age 33.7 ± 3.8 SE). One group was tested during a final exam week (High-stress group) while the other group was tested after a break, during a week without exams (Low-stress group)...
March 20, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28316272/prenatal-noise-and-restraint-stress-interact-to-alter-exploratory-behavior-and-balance-in-juvenile-rats-and-mixed-stress-reverses-these-effects
#14
Soumeya Badache, Slim Bouslama, Oualid Brahmia, Abdel Madjid Baïri, Abdel Krim Tahraoui, Ali Ladjamaa
We aimed to investigate in adolescent rats the individual and combined effects of prenatal noise and restraint stress on balance control, exploration, locomotion and anxiety behavior. Three groups of pregnant rats were exposed to daily repeated stress from day 11 to day 19 of pregnancy: 3 min noise (Noise Stress, NS); 10 min restraint (Restraint Stress, RS); or 3 min noise followed by 10 min restraint (Mixed Stress, MS). On postnatal days (PND) 44, 45 and 46, four groups of male rats (Control, NS, RS:, MS; 16 rats each), were tested as follows: 1) Beam walking (BW), 2) Open Field (OF), and 3) Elevated plus maze (EPM)...
March 19, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28288545/chronic-overexpression-of-angiotensin-1-7-in-rats-reduces-cardiac-reactivity-to-acute-stress-and-dampens-anxious-behavior
#15
Danielle Moura Santos, Fernanda Ribeiro Marins, Marcelo Limborço-Filho, Marilene Luzia de Oliveira, Daniele Hamamoto, Carlos Henrique Xavier, Fabrício Araújo Moreira, Robson Augusto Souza Santos, Maria José Campagnole-Santos, Marco Antonio Peliky Fontes
Angiotensin II (Ang II) acts as a pro-stress hormone, while other evidence indicates that angiotensin-(1-7) [Ang-(1-7)] attenuates physiological responses to emotional stress. To further test this hypothesis, in groups of 5-6 rats we evaluated autonomic, cardiovascular and behavioral parameters in male Sprague-Dawley (SD) and transgenic TGR(A1-7)3292 (TG) rats chronically overexpressing Ang-(1-7). Compared to SD rats, TG rats showed reduced baseline heart rate (HR; SD 380 ± 16 versus TG 329 ± 9 beats per minute (bpm), mean ± standard error of mean, p < ...
March 13, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28285561/adverse-parenting-is-associated-with-blunted-salivary-cortisol-awakening-response-and-altered-expression-of-glucocorticoid-receptor-%C3%AE-and-%C3%AE-2-adrenergic-receptor-mrnas-in-leukocytes-in-japanese-medical-students
#16
Tomoko Kawai, Yuki Kuwano, Kiyoshi Masuda, Kinuyo Fujita, Hiroki Tanaka, Tatsuya Nishikawa, Kazuhito Rokutan, Kensei Nishida
Adverse parenting is associated with an increased risk for the development of mood and behavioral disorders. In this study, we assessed the perceived parental bonding of 232 medical students using the parental bonding instrument (PBI) and extracted 22 students who reported their parents' rearing attitudes as affectionless control (LOW; low care, high overprotection). Using the 28-item general health questionnaire, the Zung self-rating depression scale (Zung-SDS), the hospital anxiety and depression scale (HADS), and the Spielberger state-trait-anxiety-inventory (STAI), physical and mental state of the LOW students were compared with those of 30 students who reported their parental bonding as optimal (OPT; high care and low overprotection)...
March 12, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28274152/restraint-stress-differentially-regulates-inflammation-and-glutamate-receptor-gene-expression-in-the-hippocampus-of-c57bl-6-and-balb-c-mice
#17
Monica Sathyanesan, Jacob M Haiar, Michael J Watt, Samuel S Newton
The inbred mouse strains, C57BL/6 and BALB/c have been used widely in preclinical psychiatric research. The differences in stress susceptibility of available strains has provided a useful platform to test pharmacological agents and behavioral responses. Previous brain gene profiling efforts have indicated that the inflammation and immune response gene pathway is the predominant gene network in the differential stress response of BALB/c and C57BL/6 mice. The implication is that a composite stress paradigm that includes a sequence of extended, varied and unpredictable stressors induces inflammation-related genes in the hippocampus...
March 8, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28276806/psychobiological-impact-of-ethnic-discrimination-in-turkish-immigrants-living-in-germany
#18
Susanne Fischer, Urs M Nater, Jana Strahler, Nadine Skoluda, Leander Dieterich, Orgun Oezcan, Ricarda Mewes
Perceived ethnic discrimination has a negative impact on health. One of the key mechanisms may be a dysregulation of stress-responsive systems. Our aims were to investigate whether (1) acute face-to-face ethnic discrimination induces a stress response, and (2) to compare long-term endocrine functioning between immigrants and nonimmigrants. 30 male Turkish immigrants living in Germany underwent an ethnic discrimination condition and a control condition in the laboratory. Perceived ethnic discrimination, stress, salivary alpha-amylase and cortisol were measured four times...
March 5, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28276805/the-protective-effects-of-social-bonding-on-behavioral-and-pituitary-adrenal-axis-reactivity-to-chronic-mild-stress-in-prairie-voles
#19
Neal McNeal, Katherine M Appleton, Alan Kim Johnson, Melissa-Ann L Scotti, Joshua Wardwell, Rachel Murphy, Christina Bishop, Alison Knecht, Angela J Grippo
Positive social interactions may protect against stress. This study investigated the beneficial effects of pairing with a social partner on behaviors and neuroendocrine function in response to chronic mild stress (CMS) in 13 prairie vole pairs. Following 5 days of social bonding, male and female prairie voles were exposed to 10 days of CMS (mild, unpredictable stressors of varying durations, for instance, strobe light, white noise, and damp bedding), housed with either the social partner (paired group) or individually (isolated group)...
March 5, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/28166699/planhab-study-assessment-of-psycho-neuroendocrine-function-in-male-subjects-during-21%C3%A2-d-of-normobaric-hypoxia-and-bed-rest
#20
C Strewe, R Zeller, M Feuerecker, M Hoerl, I Kumprej, A Crispin, B Johannes, T Debevec, I Mekjavic, G Schelling, A Choukèr
Immobilization and hypoxemia are conditions often seen in patients suffering from severe heart insufficiency or primary pulmonary diseases (e.g. fibrosis, emphysema). In future planned long-duration and exploration class space missions (including habitats on the moon and Mars), healthy individuals will encounter such a combination of reduced physical activity and oxygen tension by way of technical reasons and the reduced gravitational forces. These overall unconventional extraterrestrial conditions can result in yet unknown consequences for the regulation of stress-permissive, psycho-neuroendocrine responses, which warrant appropriate measures in order to mitigate foreseeable risks...
March 5, 2017: Stress: the International Journal on the Biology of Stress
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