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https://www.readbyqxmd.com/read/29793095/sex-hormones-affect-acute-and-chronic-stress-responses-in-sexually-dimorphic-patterns-consequences-for-depression-models
#1
Lei Guo, Yi-Xi Chen, Yu-Ting Hu, Xue-Yan Wu, Yang He, Juan-Li Wu, Man-Li Huang, Matthew Mason, Ai-Min Bao
BACKGROUND: Alterations in peripheral sex hormones may play an important role in sex differences in terms of stress responses and mood disorders. It is not yet known whether and how stress-related brain systems and brain sex steroid levels fluctuate in relation to changes in peripheral sex hormone levels, or whether the different sexes show different patterns. We aimed to investigate systematically, in male and female rats, the effect of decreased circulating sex hormone levels following gonadectomy on acute and chronic stress responses, manifested as changes in plasma and hypothalamic sex steroids and hypothalamic stress-related molecules...
May 21, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29793048/dna-methylation-differences-at-the-glucocorticoid-receptor-gene-in-depression-are-related-to-functional-alterations-in-hypothalamic-pituitary-adrenal-axis-activity-and-to-early-life-emotional-abuse
#2
Chloё Farrell, Kelly Doolin, Niamh O' Leary, Chaitra Jairaj, Darren Roddy, Leonardo Tozzi, Derek Morris, Andrew Harkin, Thomas Frodl, Zsófia Nemoda, Moshe Szyf, Linda Booij, Veronica O'Keane
Depression is associated with alterations in hypothalamic-pituitary-adrenal (HPA) axis activity. A proposed mechanism to explain these alterations are changes in DNA methylation levels, secondary to early life adversity (ELA), at stress-related genes. Two gene regions that have been implicated in the literature, the glucocorticoid receptor gene (NR3C1) exon 1F and the FKBP5 gene intron 7 were examined in 67 individuals (33 depressed patients and 34 controls). We investigated whether cortisol concentrations, evaluated in 25 depressed patients and 20 controls, and measures of ELA were associated with the degree of methylation at these candidate gene regions...
May 8, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29792165/molecular-characterization-and-differential-expression-suggested-diverse-functions-of-p-type-ii-ca-2-atpases-in-triticum-aestivum-l
#3
Mehak Taneja, Santosh Kumar Upadhyay
BACKGROUND: Plant P-type II Ca2+ ATPases are formed by two distinct groups of proteins (ACAs and ECAs) that perform pumping of Ca2+ outside the cytoplasm during homeostasis, and play vital functions during development and stress management. In the present study, we have performed identification and characterisation of P-type II Ca 2+ ATPase gene family in an important crop plant Triticum aestivum. RESULTS: Herein, a total of 33 TaACA and 9 TaECA proteins were identified from the various chromosomes and sub-genomes of Triticum aestivum...
May 23, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29790822/the-serotonin-transporter-polymorphism-5-httlpr-and-cortisol-stress-responsiveness-preliminary-evidence-for-a-modulating-role-for-sleep-quality
#4
Jens H van Dalfsen, C Rob Markus
The short (S) allele of a functional polymorphism (5-HTTLPR) within the promoter region of the serotonin transporter gene (SLC6A4) is found to predispose the risk for stress-related affective disorders relative to the long (L) allele. Evidence suggests that elevated stress reactivity of the hypothalamic-pituitary-adrenal (HPA) axis might underlie this association although there is little understanding about the origin of inconsistent findings. Since inadequate sleep is commonly known to promote HPA stress reactivity, it might well play an important modulating role...
May 23, 2018: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29788320/chronic-variable-stress-induces-sex-specific-alterations-in-social-behavior-and-neuropeptide-expression-in-the-mouse
#5
Amanda P Borrow, Natalie J Bales, Sally A Stover, Robert J Handa
Chronic exposure to stressors impairs the function of multiple organ systems and is implicated in increased disease risk. In the rodent, the chronic variable stress (CVS) paradigm has successfully modeled several stress-related illnesses. Despite striking disparities between men and women in the prevalence and etiology of disorders associated with chronic stress, most preclinical research examining chronic stressor exposure has focused on male subjects. One potential mediator of the consequences of CVS is oxytocin (OT), a known regulator of stress neurocircuitry and behaviors...
May 16, 2018: Endocrinology
https://www.readbyqxmd.com/read/29786832/the-primary-active-components-antioxidant-properties-and-differential-metabolite-profiles-of-radish-sprouts-raphanus-sativus-l-upon-domestic-storage-analysis-of-nutritional-quality
#6
Ru Li, Yi Zhu
BACKGROUND: This study aimed to analyze the nutritional quality of radish sprouts (Raphanus sativus L.) upon domestic short-term storage. We stored fresh radish sprouts at 25±1°C and at 4±1°C for 12 h, detected phenolic substances, glucosinolates, isothiocyanates, vitamin C, and various antioxidant and abiotic stress-related factors. We investigated nutrient-related metabolic differences and associated pathways and postharvest treatment effects on nutritional quality via metabolomics analysis...
May 21, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29786026/sources-of-medical-student-stress
#7
Krishna Subhash Vyas, Terry D Stratton, Neelkamal S Soares
Background: Key elements in the clinical practice of prevention, health and wellness are best cultivated in medical professionals during undergraduate medical training. This study explores students' self-assessed stress relative to gender, academic expectations, and level of medical training to guide development of targeted wellness interventions. Methods: In early 2012, undergraduate (M1-M4) students in four Southeastern U.S. allopathic medical schools were surveyed about health-related attitudes and behaviors...
September 2017: Education for Health: Change in Training & Practice
https://www.readbyqxmd.com/read/29785687/education-is-associated-with-the-magnitude-of-cortisol-responses-to-psychosocial-stress-in-college-students
#8
Andrew W Manigault, Alex Woody, Peggy M Zoccola, Sally S Dickerson
PURPOSE: Researchers benefit from controlling for individual differences that systematically account for variance in acute cortisol responses (e.g., sex). Similarly, some suggest that education could be used as a cortisol covariate because prior work found a negative relationship between education and the magnitude of acute cortisol responses in middle-aged adults. Nevertheless, education is seldom controlled for in tests of cortisol responses to acute stress, in part because the effect of education on acute cortisol responses has yet to be tested in a college sample...
May 21, 2018: International Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/29785161/prevalence-and-psychological-stress-in-recurrent-aphthous-stomatitis-among-female-dental-students-in-saudi-arabia
#9
Muhammed Ajmal, Lujain Ibrahim, Nada Mohammed, Heba Al-Qarni
Introduction: Recurrent Aphthous Stomatitis (RAS) is a common oral mucosal disorder which is characterized by recurrent ulcerations mainly confined to non-keratinized oral mucosa. Though the exact etiology is imprecise, stress and anxiety were found to be linked with the onset of RAS. The present study was directed to know the prevalence of RAS among female dental students in King Khalid University, to find out the association between RAS and psychological stress and the effectiveness of Hospital Anxiety and Depression scale (HADS) in finding out the psychological profile of RAS patients...
2018: Clujul Medical (1957)
https://www.readbyqxmd.com/read/29783874/influence-of-bovine-serum-albumin-pre-incubation-on-toxicity-and-er-stress-apoptosis-gene-expression-in-thp-1-macrophages-exposed-to-zno-nanoparticles
#10
Hongying Liang, Tong He, Jimin Long, Liangliang Liu, Guochao Liao, Yanhuai Ding, Yi Cao
When entering a biological environment, proteins could be adsorbed onto nanoparticles (NPs), which will consequently influence the toxicity of NPs. This study used bovine serum albumin (BSA) as the model for serum protein and investigated its interactions with three different types of ZnO NPs, coded as XFI06 (pristine NPs of 20 nm), NM110 (pristine NPs of 100 nm) and NM111 (hydrophobic NPs of 130 nm). Atomic force microscope indicated the adsorption of BSA to ZnO NPs, leading to the increase of NP diameters...
May 21, 2018: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/29783187/impact-of-drought-and-salt-stress-on-the-biosynthesis-of-alkaloids-in-chelidonium-majus-l
#11
Mahdi Yahyazadeh, Rieke Meinen, Robert Hänsch, Sara Abouzeid, Dirk Selmar
When plants are exposed to various stress situations, their alkaloid concentration frequently is enhanced. This well-known phenomenon is presumably due to a passively enhanced rate of biosynthesis, caused by greatly elevated concentrations of NADPH in stressed plants. Here, we used Chelidonium majus L. plants, which accumulate high concentrations of dihydrocoptisine in their leaves, to study the impact of drought and salt stress on the biosynthesis and accumulation of alkaloids. In comparison to well-watered controls, in the transcriptome of the gene encoding the key enzyme in alkaloid biosynthesis, stylopine synthase, is enhanced in stressed C...
May 18, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29782838/non-invasive-assessment-of-glucocorticoid-and-androgen-metabolite-levels-in-cooperatively-breeding-damaraland-mole-rats-fukomys-damarensis
#12
Katarina Medger, Nigel C Bennett, Heike Lutermann, Andre Ganswindt
Dominant females of cooperative breeding species often use aggression to suppress reproduction of subordinate females, resulting in subordinates experiencing stress-related increases in glucocorticoid levels, which may cause reproductive down-regulation. This would suggest a general pattern with higher glucocorticoid levels in subordinate compared to dominant individuals; however, the opposite was found in a number of cooperatively breeding species. Furthermore, breeding females of the cooperatively breeding Damaraland mole-rats (Fukomys damarensis) exhibit very high androgen concentrations during the wet season, presumably to support their breeding monopoly...
May 18, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29781947/childhood-trauma-dna-methylation-of-stress-related-genes-and-depression-findings-from-two-monozygotic-twin-studies
#13
Hao Peng, Yun Zhu, Eric Strachan, Emily Fowler, Tamara Bacus, Peter Roy-Byrne, Jack Goldberg, Viola Vaccarino, Jinying Zhao
OBJECTIVE: DNA methylation has been associated with both early life stress and depression. This study examined the combined association of DNA methylation at multiple CpG probes in five stress-related genes with depressive symptoms, and tested whether these genes methylation mediated the association between childhood trauma and depression in two monozygotic (MZ) twin studies. METHODS: The current analysis comprised 119 MZ twin pairs (84 male pairs [mean 55 years], and 35 female pairs [mean 36 years])...
May 17, 2018: Psychosomatic Medicine
https://www.readbyqxmd.com/read/29781924/changes-in-psychiatric-and-medical-conditions-and-health-care-utilization-following-a-diagnosis-of-sexual-assault-a-retrospective-cohort-study
#14
Kelly C Young-Wolff, Varada Sarovar, Daniella Klebaner, Felicia Chi, Brigid McCaw
INTRODUCTION: Sexual assault (SA) is alarmingly common and is associated with higher prevalence of psychiatric and medical conditions. However, many prior studies are limited to cross-sectional designs. Health care systems with electronic health records provide unique longitudinal data to examine whether SA is associated with changes in health and health care utilization. METHODS: The sample included 1350 Kaiser Permanente Northern California adult female patients with a SA diagnosis from 2009 to 2015 and 4050 adult female patients without a SA diagnosis, matched on age, medical facility, and continuous enrollment during the study period...
May 17, 2018: Medical Care
https://www.readbyqxmd.com/read/29779146/food-addiction-orthorexia-and-food-related-stress-among-dietetics-students
#15
Maria G Grammatikopoulou, Konstantinos Gkiouras, Anastasia Markaki, Xenophon Theodoridis, Vasiliki Tsakiri, Pantelis Mavridis, Theodore Dardavessis, Michael Chourdakis
PURPOSE: Health sciences, and in particular Nutrition and Dietetics students, have been shown to exhibit an increased prevalence of disordered eating. The aim of the present cross-sectional study was to evaluate other specified feeding and eating disorders (OSFEDs), including stress-related eating, food addiction, and orthorexia, in relation to the dietary intake, among nutrition/dietetics students. METHODS: A total of 176 undergraduate students from a Department of Nutrition and Dietetics, in Greece, participated in the study...
May 19, 2018: Eating and Weight Disorders: EWD
https://www.readbyqxmd.com/read/29778840/identification-of-a-novel-promoter-from-banana-aquaporin-family-gene-matip1-2-which-responses-to-drought-and-salt-stress-in-transgenic-arabidopsis-thaliana
#16
Shun Song, Yi Xu, Dongmei Huang, Hongxia Miao, Juhua Liu, Caihong Jia, Wei Hu, Ana Valeria Valarezo, Biyu Xu, Zhiqiang Jin
Drought and salt stresses often affect plant growth and crop yields. Identification of promoters involved in drought and salt stress responses is of great significance for genetic improvement of crop resistance. Our previous studies showed that aquaporin can respond to drought and salt stresses, but its promoter has not yet been reported in plants. In the present study, cis-acting elements of MaAQP family member promoters were systematically analyzed in banana. Expression of MaTIP1; 2 was induced by drought and salt stresses but not sensitive to cold stress, waterlogging stress, or mechanical damage, and its promoter contained five stress-related cis-acting elements...
May 17, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29775961/antioxidant-response-elements-discovery-classes-regulation-and-potential-applications
#17
REVIEW
Azhwar Raghunath, Kiruthika Sundarraj, Raju Nagarajan, Frank Arfuso, Jinsong Bian, Alan P Kumar, Gautam Sethi, Ekambaram Perumal
Exposure to antioxidants and xenobiotics triggers the expression of a myriad of genes encoding antioxidant proteins, detoxifying enzymes, and xenobiotic transporters to offer protection against oxidative stress. This articulated universal mechanism is regulated through the cis-acting elements in an array of Nrf2 target genes called antioxidant response elements (AREs), which play a critical role in redox homeostasis. Though the Keap1/Nrf2/ARE system involves many players, AREs hold the key in transcriptional regulation of cytoprotective genes...
May 7, 2018: Redox Biology
https://www.readbyqxmd.com/read/29775876/childhood-abuse-and-depression-in-adulthood-the-mediating-role-of-allostatic-load
#18
Sandra Scheuer, Nicole Wiggert, Tanja Maria Brückl, Yvonne Awaloff, Manfred Uhr, Susanne Lucae, Stefan Kloiber, Florian Holsboer, Marcus Ising, Frank H Wilhelm
BACKGROUND: Traumatic experiences during childhood are considered a major risk factor for depression in adulthood. Childhood trauma may induce physiological dysregulation with long-term effects of increased allostatic load until adulthood, which may lead to depression. Thus, our aim was to investigate whether allostatic load - which represents a multi-system measure of physiological dysregulation - mediates the association between childhood trauma and adult depression. METHODS: The study sample consisted of 324 depressed inpatients participating in the Munich Antidepressant Response Signature (MARS) project and 261 mentally healthy control participants...
April 22, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29775837/predator-based-psychosocial-stress-model-of-ptsd-differentially-influences-voluntary-ethanol-consumption-depending-on-methodology
#19
Phillip R Zoladz, Eric D Eisenmann, Robert M Rose, Brooke A Kohls, Brandon L Johnson, Kiera L Robinson, Megan E Heikkila, Kasey E Mucher, Madelaine R Huntley
Post-traumatic stress disorder (PTSD) is a debilitating psychological disorder typified by diagnostic symptom clusters including hyperarousal, avoidance, negative cognitions and mood, and intrusive re-experiencing of the traumatic event. Patients with PTSD have been reported to self-medicate with alcohol to ameliorate hyperarousal symptoms associated with the disorder. Research utilizing rodent models of PTSD to emulate this behavioral phenomenon has thus far yielded inconsistent results. In the present study, we examined the effects of a predator-based psychosocial stress model of PTSD on voluntary ethanol consumption...
January 8, 2018: Alcohol
https://www.readbyqxmd.com/read/29774962/maternal-regulation-of-the-infant-s-hpa-axis-stress-response-seymour-gig-levine-s-legacy-to-neuroendocrinology
#20
REVIEW
Deborah Suchecki
Thirty years ago, Seymour 'Gig' Levine published a serendipitous, yet, seminal finding on the regulatory role of maternal presence on the corticosterone stress response of neonatal rats, during the developmental period know as stress hyporesponsive period. At the same time, his group of students also studied the stress response of infant monkeys to maternal separation, as a means to understand the stressful nature of disruptions of attachment to the primary caregiver. Gig and his group of students and collaborators, mainly in the USA and the Netherlands, investigated how initial social relationships buffer the stress response of non-human primate and rodent infants...
May 18, 2018: Journal of Neuroendocrinology
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