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https://www.readbyqxmd.com/read/29775874/emotion-regulation-as-a-predictor-of-the-endocrine-autonomic-affective-and-symptomatic-stress-response-and-recovery
#1
Katarina Krkovic, Annika Clamor, Tania M Lincoln
Stress is associated with the development of mental disorders such as depression and psychosis. The ability to regulate emotions is likely to influence how individuals respond to and recover from acute stress, and may thus be relevant to symptom development. To test this, we investigated whether self-reported emotion regulation predicts the endocrine, autonomic, affective, and symptomatic response to and recovery from a stressor. Social-evaluative stress was induced by the Trier Social Stress Test (TSST) in N = 67 healthy individuals (53...
April 30, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29762733/the-effect-of-vaginal-microbial-communities-on-colonization-by-staphylococcus-aureus-with-the-gene-for-toxic-shock-syndrome-toxin-1-tsst-1-a-case-control-study
#2
Jacob D Pierson, Melanie A Hansmann, Catherine C Davis, Larry J Forney
Menstrual toxic shock syndrome is associated with vaginal colonization by Staphylococcus aureus strains that encode toxic shock syndrome toxin 1 (tst+). Interestingly, a small proportion of women are colonized by S. aureus tst+ but do not have symptoms of toxic shock syndrome. Here we sought to determine if differences in the species composition of vaginal bacterial communities reflect a differential risk of colonization by S. aureus capable of producing toxic shock syndrome toxin 1 (TSST-1). The composition of vaginal communities of women that were or were not colonized with S...
June 1, 2018: Pathogens and Disease
https://www.readbyqxmd.com/read/29754003/stress-induced-pro-and-anti-inflammatory-cytokine-concentrations-in-panic-disorder-patients
#3
Katja Petrowski, Susann Wichmann, Clemens Kirschbaum
BACKGROUND: An attenuated responsivity of the hypothalamus-hypophysis-adrenal (HPA) axis upon challenge and an increased risk for cardiac events are relatively consistent findings in panic disorder (PD) patients. Due to cytokine-HPA interactions, an altered HPA-axis responsivity may be accompanied by altered cytokine concentrations. Immunological reactions under stress might be considered the missing link for explaining an increased cardiac risk. This study analyzed stress-induced cytokine levels in PD patients...
May 4, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29745876/the-presence-of-staphylococcal-superantigens-in-nasal-swabs-and-correlation-with-activity-of-granulomatosis-with-polyangiitis-in-own-material
#4
Justyna Fijołek, Elzbieta Wiatr, Violetta Petroniec, Ewa Augustynowicz-Kopec, Michal Bednarek, Dariusz Gawryluk, Magdalena Maria Martusewicz-Boros, Katarzyna Modrzewska, Elzbieta Radzikowska, Kazimerz Roszkowski-Sliz
OBJECTIVES: Nasal carriage of Staphylococcus aureus and its superantigens (SAg) seem to be a risk factor disease exacerbation in granulomatosis with polyangiitis (GPA). We investigated the association between the presence of SAg in nasal swabs and activity of disease in GPA patients also taking into account correlation with an antimicrobial treatment. METHODS: In a prospective study of a total of 150 GPA patients hospitalised in the period 2009-2016, nasal swabs were examined for the presence of Staphylococcus aureus and SAg...
May 4, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29740073/stress-associated-changes-in-salivary-micrornas-can-be-detected-in-response-to-the-trier-social-stress-test-an-exploratory-study
#5
Conrad Wiegand, Peter Heusser, Claudia Klinger, Dirk Cysarz, Arndt Büssing, Thomas Ostermann, Andreas Savelsbergh
Stress is an important co-factor for the genesis and maintenance of many diseases and is known to have an effect on gene expression via epigenetic regulation. MicroRNAs (miRNAs) appear to function as one of the key factors of this regulation. This is the first study to investigate the response of 11 stress-associated miRNAs in human saliva - as a non-invasive source - in an experimental condition of acute psychological stress, and also their correlation with established psychological (subjective stress perception), physiological (heart rate and heart rate variability) and biochemical stress parameters (salivary cortisol and alpha-amylase)...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29712842/less-immune-activation-following-social-stress-in-rural-vs-urban-participants-raised-with-regular-or-no-animal-contact-respectively
#6
Till S Böbel, Sascha B Hackl, Dominik Langgartner, Marc N Jarczok, Nicolas Rohleder, Graham A Rook, Christopher A Lowry, Harald Gündel, Christiane Waller, Stefan O Reber
Urbanization is on the rise, and environments offering a narrow range of microbial exposures are linked to an increased prevalence of both physical and mental disorders. Human and animal studies suggest that an overreactive immune system not only accompanies stress-associated disorders but might even be causally involved in their pathogenesis. Here, we show in young [mean age, years (SD): rural, 25.1 (0.78); urban, 24.5 (0.88)] healthy human volunteers that urban upbringing in the absence of pets ( n = 20), relative to rural upbringing in the presence of farm animals ( n = 20), was associated with a more pronounced increase in the number of peripheral blood mononuclear cells (PBMCs) and plasma interleukin 6 (IL-6) concentrations following acute psychosocial stress induced by the Trier social stress test (TSST)...
May 15, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29679879/polygenic-risk-score-of-serpina6-serpina1-associates-with-diurnal-and-stress-induced-hpa-axis-activity-in-children
#7
Siddheshwar Utge, Katri Räikkönen, Eero Kajantie, Jari Lipsanen, Sture Andersson, Timo Strandberg, Rebecca M Reynolds, Johan G Eriksson, Jari Lahti
PURPOSE: Corticosteroid-binding globulin (CBG) transports glucocorticoids in blood. Variation in genes SERPINA6 encoding for CBG, SERPINA2 and SERPINA1 (serpin family A member 6, 2, and 1) have been shown to influence morning plasma cortisol and CBG in adults. However, association of this genetic variation with diurnal and stress-induced salivary cortisol remain unknown. This study aims to investigate the effect of genetic variation in SERPINA6/2/1 loci on diurnal and stress-induced salivary cortisol in children...
April 13, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29678918/impact-of-currently-marketed-tampons-and-menstrual-cups-on-staphylococcus-aureus-growth-and-tsst-1-production-in-vitro
#8
Louis Nonfoux, Myriam Chiaruzzi, Cédric Badiou, Jessica Baude, Anne Tristan, Jean Thioulouse, Daniel Muller, Claire Prigent Combaret, Gérard Lina
Fifteen currently marketed intravaginal protection products (11 types of tampon and four menstrual cups) were tested by the modified tampon sac method to determine their effect on Staphylococcus aureus growth and toxic shock toxin 1 (TSST-1) production. Most tampons reduced S. aureus growth and TSST-1 production, with differences based on brand and composition, and S. aureus growth was higher in de-structured than in unaltered tampons. We observed higher S. aureus growth and toxin production in menstrual cups than in tampons, potentially due to the additional air introduced to the bag by cups, with differences based on cup composition and size...
April 20, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29676866/detecci%C3%A3-n-y-expresi%C3%A3-n-de-superant%C3%A3-genos-y-de-resistencia-antimicrobiana-en-aislamientos-obtenidos-de-mujeres-portadoras-de-staphylococcus-aureus-que-cuidan-y-alimentan-ni%C3%A3-os
#9
Yina Marcela Guaca-González, Gladys Fernanda Flórez-Restrepo, José Ignacio Moncayo-Ortíz, Jorge Santacruz-Ibarra, Adalucy Álvarez-Aldana
Introducción. Staphylococcus aureus coloniza mucosas y piel, y causa graves infecciones en el hombre y los animales. Es importante establecer el estatus de portadoras de cepas enterotoxigénicas de este microorganismo en manipuladoras de alimentos, con el fin de prevenir intoxicaciones alimentarias.Objetivo. Establecer las correlaciones entre los genes de enterotoxinas clásicas, el gen tsst-1, la producción de toxinas en cultivo y la resistencia antimicrobiana en aislamientos de S. aureus provenientes de manipuladoras de alimentos que cuidan niños en sus comunidades...
March 15, 2018: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29657682/the-relationship-between-prevalence-of-antibiotics-resistance-and-virulence-factors-genes-of-mrsa-and-mssa-strains-isolated-from-clinical-samples-west-iran
#10
Mohammad Reza Arabestani, Sahar Rastiyani, Mohammad Yousef Alikhani, Seyed Fazlullah Mousavi
Objectives: We sought to evaluate the relationship between the prevalence of antibiotics resistance and virulence factors genes in methicillin-resistant Staphylococcal aureus (MRSA) and methicillin-sensitive S. aureus (MSSA) strains from clinical samples taken in west Iran. Methods: We performed a cross-sectional study using 100 MRSA and 100 MSSA samples isolated from clinical specimens. We used biochemical methods to identify the isolates, which were confirmed by the polymerase chain reaction (PCR) assay...
March 2018: Oman Medical Journal
https://www.readbyqxmd.com/read/29621629/genetic-characterization-of-staphylococcus-aureus-isolated-from-milk-and-nasal-samples-of-healthy-cows-in-tunisia-first-report-of-st97-t267-agri-sccmecv-mrsa-of-bovine-origin-in-tunisia
#11
Monia Khemiri, Mohamed Salah Abbassi, Natacha Couto, Riadh Mansouri, Salah Hammami, Constança Pomba
OBJECTIVES: This study aimed to screen for and characterize methicillin-susceptible S. aureus (MSSA) and MRSA in nasal swabs and milk from healthy cows from different regions in Tunisia. METHODS: One hundred and forty-one Staphylococcus spp. isolates were recovered from milk and nasal swabs of cows. S. aureus isolates were further characterized by determining their antibiotic susceptibilities, genes encoding antibiotic resistance and virulence factors, biofilm production, agr type and PFGE...
April 2, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29605399/the-relationship-between-the-menstrual-cycle-and-cortisol-secretion-daily-and-stress-invoked-cortisol-patterns
#12
Eva Montero-López, Ana Santos-Ruiz, M Carmen García-Ríos, Manuel Rodríguez-Blázquez, Heather L Rogers, María Isabel Peralta-Ramírez
The menstrual cycle involves significant changes in hormone levels, causing physical and psychological changes in women that are further influenced by stress. The aim of this study was to understand the relationship between menstrual cycle phase and salivary cortisol patterns during the day as well as the salivary cortisol response to the Virtual Reality Version of the Trier Social Stress Test (TSST-VR). Forty two women not taking oral contraceptives (24 in follicular phase and 18 in luteal phase) participated in the study...
March 29, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29599675/activity-of-antimicrobial-peptides-and-conventional-antibiotics-against-superantigen-positive-staphylococcus-aureus-isolated-from-patients-with-atopic-dermatitis
#13
Izabela Błażewicz, Maciej Jaśkiewicz, Lidia Piechowicz, Damian Neubauer, Roman J Nowicki, Wojciech Kamysz, Wioletta Barańska-Rybak
Introduction: Staphylococcus aureus causes a diverse array of diseases, ranging from relatively harmless localized skin infections to life-threatening systemic conditions. It secretes toxins directly associated with particular disease symptoms. Aim: To determine the prevalence of methicillin-resistant S. aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) colonization among patients with atopic dermatitis and to assess the antimicrobial susceptibility to conventional antibiotics and selected antimicrobial peptides among toxin-producing strains and nonproducing strains...
February 2018: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/29565724/molecular-epidemiology-and-virulence-features-of-staphylococcus-aureus-bloodstream-isolates-in-a-regional-burn-center-in-china-2012-2016
#14
Yang Liu, Fang-Ling Du, Pan-Pan Liu, Yan-Fang Mei, La-Gen Wan, Dan-Dan Wei, Heng-Yi Xu, Wei Zhang
Staphylococcus aureus is known to be a predominant pathogen causing bloodstream infection (BSI) from burn units. Our study aimed to perform the clinical epidemiological analysis and virulence features of S. aureus strains isolated from the burn patients with BSI from a burn center in southeastern China during 2012-2016. A collection of 112 S. aureus isolates causing BSI from burn center of a tertiary care hospital in China was carried out. Antimicrobial susceptibility testing was conducted in accordance with the Clinical and Laboratory Standards Institute (CLSI) guidelines...
March 22, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29564946/virulence-factor-genes-in-staphylococcus-aureus-isolated-from-diabetic-foot-soft-tissue-and-bone-infections
#15
Gerardo Víquez-Molina, Javier Aragón-Sánchez, Cristian Pérez-Corrales, Christian Murillo-Vargas, María Eugenia López-Valverde, Benjamin A Lipsky
The aim of this study is to describe the presence of genes encoding for 4 virulence factors (pvl, eta, etb, and tsst), as well as the mecA gene conferring resistance to beta-lactam antibiotics, in patients with diabetes and a staphylococcal foot infection. We have also analyzed whether isolates of Staphylococcus aureus from bone infections have a different profile for these genes compared with those from exclusively soft tissue infections. In this cross-sectional study of a prospectively recruited series of patients admitted to the Diabetic Foot Unit, San Juan de Dios Hospital, San José, Costa Rica with a moderate or severe diabetic foot infection (DFI), we collected samples from infected soft tissue and from bone during debridement...
March 1, 2018: International Journal of Lower Extremity Wounds
https://www.readbyqxmd.com/read/29560307/stress-related-dysfunction-of-the-right-inferior-frontal-cortex-in-high-ruminators-an-fnirs-study
#16
David Rosenbaum, Mara Thomas, Paula Hilsendegen, Florian G Metzger, Florian B Haeussinger, Hans-Christoph Nuerk, Andreas J Fallgatter, Vanessa Nieratschker, Ann-Christine Ehlis
Repetitive thinking styles such as rumination are considered to be a key factor in the development and maintenance of mental disorders. Different situational triggers (e.g., social stressors) have been shown to elicit rumination in subjects exhibiting such habitual thinking styles. At the same time, the process of rumination influences the adaption to stressful situations. The study at hand aims to investigate the effect of trait rumination on neuronal activation patterns during the Trier Social Stress Test (TSST) as well as the physiological and affective adaptation to this high-stress situation...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29544544/comparative-and-molecular-analysis-of-mrsa-isolates-from-infection-sites-and-carrier-colonization-sites
#17
Khaled R Alkharsah, Suriya Rehman, Fatimah Alkhamis, Amani Alnimr, Asim Diab, Amein K Al-Ali
BACKGROUND: Methicillin resistant Staphylococcus aureus (MRSA) constitutes a major global health concern causing hospital and community acquired infections. A wide diversity of MRSA genotypes are circulating in geographically related regions. Therefore understanding the molecular epidemiology of MRSA is fundamental to design control and clearance measures. METHODS: A total of 106 MRSA isolates from infection (51) and carrier colonization sites (55) are characterized genetically based on SCCmec and MLST genotyping methods in addition to detection of PVL, TSST-1 and enterotoxins...
March 15, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29529950/the-plasma-interleukin-6-response-to-acute-psychosocial-stress-in-humans-is-detected-by-a-magnetic-multiplex-assay-comparison-to-high-sensitivity-elisa
#18
Andrea M Quinn, Allison R Williams, Teresa I Sivilli, Charles L Raison, Thaddeus W W Pace
Circulating concentrations of interleukin (IL)-6, an inflammatory biomarker widely assessed in humans to study the inflammatory response to acute psychological stress, have for decades been quantified using enzyme-linked immunosorbent assay (ELISA). However, biobehavioral researchers are increasingly using cytokine multiplex assays instead of ELISA to measure IL-6 and other cytokines. Despite this trend, multiplex assays have not been directly compared to ELISA for their ability to detect subtle stress-induced changes of IL-6...
March 13, 2018: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29529922/assessing-the-antecedents-and-consequences-of-threat-appraisal-of-an-acute-psychosocial-stressor-the-role-of-optimism-displacement-behavior-and-physiological-responses
#19
Martina Zandara, Carolina Villada, Vanesa Hidalgo, Alicia Salvador
The feeling of stress is increasing in today's societies, particularly in young adults subjected to social evaluative situations in highly competitive academic and work contexts. Threat appraisal is a primary and fundamental reaction when people face a stressful situation. The aim of this study was to investigate the role of dispositional optimism as an antecedent and displacement behavior as a consequence of threat appraisal of a social-evaluative situation of stress. A second objective was to verify the moderating role of physiological responses to stress (heart rate and cortisol reactivity) in the relationship between threat appraisal and displacement behavior...
March 13, 2018: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29522544/sex-differences-in-the-association-between-internalizing-symptoms-and-hair-cortisol-level-among-10-12-year-old-adolescents-in-china
#20
Qingyun Lu, Fada Pan, Lingling Ren, Jing Xiao, Fangbiao Tao
Although numerous studies have described the relationship between HPA axis dysregulation and internalizing symptoms among adolescents, research using hair cortisol concentrations in pre- and young adolescent samples has not been reported. We investigated the association of self-reported internalizing symptoms with cortisol concertration in hair among pre- and young adolescents aged 10-12 years. Forty-six boys and 39 girls supplied a hair sample of at least 3 cm in length for an analysis of this period (3 months) cortisol excretion...
2018: PloS One
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