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https://www.readbyqxmd.com/read/28526480/human-seasonal-and-circadian-studies-in-antarctica-halley-75-0-s
#1
Josephine Arendt, Benita Middleton
Living for extended periods in Antarctica exposes base personnel to extremes of daylength (photoperiod) and temperature. At the British Antarctic Survey base of Halley, 75(0)S, the sun does not rise for 110 d in the winter and does not set for 100 d in summer. Photoperiod is the major time cue governing the timing of seasonal events such as reproduction in many species. The neuroendocrine signal providing photoperiodic information to body physiology is the duration of melatonin secretion which reflects the length of the night: longer in the short days of winter and shorter in summer...
May 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28515237/increasing-the-illumination-slowly-over-several-weeks-protects-against-light-damage-in-the-eyes-of-the-crustacean-mysis-relicta
#2
Martta L M Viljanen, Noora E Nevala, Cecilia L Calais-Granö, K Magnus W Lindström, Kristian Donner
The eyes of two glacial-relict populations of opossum shrimp Mysis relicta inhabiting the different photic environments of a deep, dark-brown freshwater lake and a variably lit bay of the Baltic Sea differ in their susceptibility to functional depression from strong light exposures. The lake population is much more vulnerable than the sea population. We hypothesized that the difference reflects physiological adaptation mechanisms operating on long time scales rather than genetically fixed differences between the populations...
May 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28495610/-allergic-mood-depressive-and-anxiety-symptoms-in-patients-with-seasonal-allergic-rhinitis-sar-and-their-association-to-inflammatory-endocrine-and-allergic-markers
#3
Katharina Trikojat, Hella Luksch, Angela Rösen-Wolff, Franziska Plessow, Jochen Schmitt, Angelika Buske-Kirschbaum
A growing number of studies show an association between seasonal allergic rhinitis (SAR) with depression and anxiety. The underlying mechanisms of a link between SAR and affect, however, are still unclear. The objective of the present study was to investigate depressive symptoms and anxiety in SAR patients and their association to inflammatory and endocrine parameters. SAR patients (n=41) and non-allergic, healthy controls (n=42) were assessed during (pollen season) and out of symptomatic periods (non-pollen season)...
May 8, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28462482/what-do-people-search-online-concerning-the-elusive-fibromyalgia-insights-from-a-qualitative-and-quantitative-analysis-of-google-trends
#4
Nicola Luigi Bragazzi, Howard Amital, Mohammad Adawi, Francesco Brigo, Samaa Watad, Gali Aljadeff, Daniela Amital, Abdulla Watad
Fibromyalgia is a chronic disease, characterized by pain, fatigue, and poor sleep quality. Patients and mainly those with chronic diseases tend to search for health-related material online. Google Trends (GT), an online tracking system of Internet hit-search volumes that recently merged with its sister project Google Insights for Search (Google Inc.), was used to explore Internet activity related to fibromyalgia. Digital interest in fibromyalgia and related topics searched worldwide has been reported in the last 13 years...
May 1, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28441037/preseason-anxiety-and-depressive-symptoms-and-prospective-injury-risk-in-collegiate-athletes
#5
Hongmei Li, Jennifer J Moreland, Corinne Peek-Asa, Jingzhen Yang
BACKGROUND: Psychological risk factors are increasingly recognized as important in sport-related injury prevention. Understanding how these psychological factors may affect the risk of injuries could help design effective prevention programs. PURPOSE: To determine the effect of reported preseason anxiety and depressive symptoms on the risk of injuries during a prospective season in a cohort of collegiate athletes. STUDY DESIGN: Cohort study; Level of evidence, 2...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28439746/plasma-phosphatidylethanolamine-and-triacylglycerol-fatty-acid-concentrations-are-altered-in-major-depressive-disorder-patients-with-seasonal-pattern
#6
Yurika Otoki, Marie Hennebelle, Anthony J Levitt, Kiyotaka Nakagawa, Walter Swardfager, Ameer Y Taha
Disturbances in peripheral and brain lipid metabolism, including the omega-3 fatty acid docosahexaenoic acid (DHA), have been reported in major depressive disorder (MDD). However, these changes have yet to be confirmed in MDD with seasonal pattern (MDD-s), a subtype of recurrent MDD. The present exploratory study quantified plasma plasmalogen and diacyl-phospholipid species, and fatty acids within total phospholipids, cholesteryl esters, triacylglycerols and free fatty acids in non-medicated MDD-s participants (n = 9) during euthymia in summer or fall, and during depression in winter in order to screen for potential high sensitivity lipid biomarkers...
April 24, 2017: Lipids
https://www.readbyqxmd.com/read/28401394/revisiting-inland-hypoxia-diverse-exceedances-of-dissolved-oxygen-thresholds-for-freshwater-aquatic-life
#7
Gavin N Saari, Zhen Wang, Bryan W Brooks
Water resources in many regions are stressed by impairments resulting from climate change, population growth and urbanization. In the United States (US), water quality criteria (WQC) and standards (WQS) were established to protect surface waters and associated designated uses, including aquatic life. In inland waters of the south central US, for example, depressed dissolved oxygen (DO) consistently results in impaired aquatic systems due to noncompliance with DO WQC and WQS. In the present study, we systematically examined currently available DO threshold data for freshwater fish and invertebrates and performed probabilistic aquatic hazard assessments with low DO toxicity data that were used to derive the US Environmental Protection Agency's (EPA) Ambient Water Quality Criteria (AWQC) for DO and newly published information...
April 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28391103/seasonal-patterns-in-self-reported-peripartum-depressive-symptoms
#8
H E Henriksson, S M Sylvén, T K Kallak, F C Papadopoulos, A Skalkidou
BACKGROUND: In the peripartum period, the literature on seasonality in depression is still scarce and studies present varying findings. The aims of this study were to investigate whether seasonal patterns in postpartum depressive symptoms previously identified in a Swedish study could be replicated in a larger study, as well as to assess seasonal patterns in depressive symptoms during pregnancy. METHODS: This was a nested case-control study comprised of 4129 women who participated in the BASIC project and gave birth at Uppsala University Hospital, Uppsala, Sweden, between February 2010 and December 2015...
March 18, 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28385173/novel-augmentation-strategies-in-major-depression
#9
Klaus Martiny
Hypothesis The hypotheses of all the four included studies share the common idea that it is possible to augment the effect of antidepressant drug treatment by applying different interventions and with each intervention attain a clinically meaningful better effect compared to a control condition, and with minor side effects, thus improving the short- and medium-term outcome in major depression. Procedures Study design The basic study design has been the double blind randomised controlled trial (RCT). In the light therapy study, all patients were treated with sertraline for the whole of the study duration...
April 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28385072/spatial-and-temporal-variation-in-the-stable-isotope-composition-%C3%AE-18-o-and-%C3%AE-2-h-of-rain-across-the-tropical-island-of-sri-lanka
#10
E A N V Edirisinghe, H M T G A Pitawala, H A Dharmagunawardhane, R L Wijayawardane
Seasonal and spatial variation in δ(18)O and δ(2)H in rainwater was determined in three selected transects across Sri Lanka, the tropical island in the Indian Ocean. Local meteoric water lines (LMWLs) for three distinguished climatic zones; wet, dry and intermediate were constructed. LMWLs show slight variations in their gradients and respective d-excess values, depending on the air moisture origin, circulation and environmental conditions of each climatic zone. The elevation effect and amount effect could be identified but the continental effect is not significantly seen in the isotope composition of rain in the concerned areas...
April 6, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28381902/soil-water-availability-and-evaporative-demand-affect-seasonal-growth-dynamics-and-use-of-stored-water-in-co-occurring-saplings-and-mature-conifers-under-drought
#11
Walter Oberhuber
High-resolution time series of stem radius variations (SRVs) record fluctuations in tree water status and temporal dynamics of radial growth. The focus of this study was to evaluate the influence of tree size (i.e., saplings vs. mature trees) and soil water availability on SRVs. Dendrometers were installed on Pinus sylvestris at an open xeric site and on Picea abies at a dry-mesic site, and the SRVs of co-occurring saplings and mature trees were analyzed during two consecutive years. The results revealed that irrespective of tree size, radial growth in P...
April 2017: Trees: Structure and Function
https://www.readbyqxmd.com/read/28364591/seasonal-affective-disorder-and-alcohol-abuse-disorder-in-a-population-based-study
#12
Isabel Morales-Muñoz, Seppo Koskinen, Timo Partonen
Seasonal affective disorder (SAD) is a recurrent major depressive disorder with a seasonal pattern, which is characterized by sad mood, low energy, longer sleep duration and carbohydrate craving. Furthermore, seasonal changes in mood and behavior may be closely related to alcohol use disorder (AUD). Nevertheless, there is scarce research on the study of cognitive impairments in SAD and AUD. We aimed to examine the relationship between the prevalence between SAD and AUD patients, and how cognitive functioning might be related to these variables...
March 18, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28358524/loneliness-predicts-self-reported-cold-symptoms-after-a-viral-challenge
#13
Angie S LeRoy, Kyle W Murdock, Lisa M Jaremka, Asad Loya, Christopher P Fagundes
OBJECTIVE: Loneliness is a well-established risk factor for poor physical health. Much less is known about how loneliness affects patient-reported outcomes (PROs), such as somatic symptoms, which are increasingly important for guiding symptom management and assessing quality of patient care. The current study investigates whether (a) loneliness and social isolation predict cold symptoms independent of each other, and (b) whether loneliness is a more robust risk factor than objective social isolation for experiencing cold symptoms...
May 2017: Health Psychology: Official Journal of the Division of Health Psychology, American Psychological Association
https://www.readbyqxmd.com/read/28345527/prevalence-and-factors-promoting-the-occurrence-of-vitamin-d-deficiency-in-the-elderly
#14
Magdalena Wyskida, Katarzyna Wieczorowska-Tobis, Jerzy Chudek
Vitamin D deficiency affects a large part of the population of elderly people, especially women, who live in moderate climate countries due to a reduced amount of vitamin D in the diet (small sea fish consumption) and reduced content of 7-dehydrocholesterol, which causes decreased skin synthesis. The lowest seasonal concentration of 25(OH)D3 is usually observed during winter and spring. Sun exposure influences 25(OH)D3 concentration more strongly in men than in women. Sociodemographic factors that increase the risk of vitamin D deficiency in the elderly include poor environmental conditions, low economic status, lower educational level, drug exposure (smoking), reduced physical activity, overall poor health and obesity, which causes reduced skin exposure to sunlight...
March 13, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28344397/comparative-study-of-obstructive-urolithiasis-and-its-sequelae-in-buffalo-calves
#15
Yasmin H Bayoumi, Noura E Attia
AIM: The present work was designed to study the incidence of obstructive urolithiasis and to apply comparative diagnosis to urine retention cases. MATERIALS AND METHODS: A total of 78 non-castrated buffalo calves aging 3-11 months were included in this study, 68 calves were admitted to the Veterinary Teaching Hospital, Zagazig University, Egypt, during the study period with a history of anuria, and they were classified into three groups; intact bladder group (19 calves), uroperitoneum group (45 calves), and ruptured urethra group (4 calves)...
February 2017: Veterinary World
https://www.readbyqxmd.com/read/28333994/chronic-environmental-stress-enhances-tolerance-to-seasonal-gradual-warming-in-marine-mussels
#16
Ionan Marigómez, Maria Múgica, Urtzi Izagirre, Inna M Sokolova
In global climate change scenarios, seawater warming acts in concert with multiple stress sources, which may enhance the susceptibility of marine biota to thermal stress. Here, the responsiveness to seasonal gradual warming was investigated in temperate mussels from a chronically stressed population in comparison with a healthy one. Stressed and healthy mussels were subjected to gradual temperature elevation for 8 days (1°C per day; fall: 16-24°C, winter: 12-20°C, summer: 20-28°C) and kept at elevated temperature for 3 weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28329660/predictors-of-tanning-dependence-in-white-non-hispanic-females-and-males
#17
Brenda Cartmel, Susan T Mayne, Allen E Bale, Joel Gelernter, Andrew DeWan, David J Leffell, Sherry Pagoto, Peter Spain, Leah M Ferrucci
Growing evidence suggests some individuals may exhibit dependence to ultraviolet light, a known carcinogen; however, few studies have investigated predictors of tanning dependence (TD).A sub-set of early-onset basal cell carcinoma case-control study participants completed an online survey. The modified-Cut down, Annoyed, Guilty, Eye-opener (mCAGE) and a questionnaire based on the addiction criteria of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (mDSM-IV-TR) were used to classify participants having'Symptoms of TD' if they met criteria for TD on both questionnaires, 'Tendency for TD' if met criteria on only one questionnaire, or 'Not TD'...
September 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28293623/patients-experience-of-winter-depression-and-light-room-treatment
#18
Cecilia Rastad, Lennart Wetterberg, Cathrin Martin
Background. There is a need for more knowledge on the effects of light room treatment in patients with seasonal affective disorder and to explore patients' subjective experience of the disease and the treatment. Methods. This was a descriptive and explorative study applying qualitative content analysis. A purposeful sample of 18 psychiatric outpatients with a major depressive disorder with a seasonal pattern and a pretreatment score ≥12 on the 9-item Montgomery-Åsberg Depression self-rating scale was included (10 women and 8 men, aged 24-65 years)...
2017: Psychiatry Journal
https://www.readbyqxmd.com/read/28278268/highs-and-lows-ups-and-downs-meteorology-and-mood-in-bipolar-disorder
#19
Ben Bullock, Greg Murray, Denny Meyer
Seasonal variation of manic and depressive symptoms is a controversial topic in bipolar disorder research. Several studies report seasonal patterns of hospital admissions for depression and mania and variation in symptoms that appear to follow a seasonal pattern, whereas others fail to report such patterns. Differences in research methodologies, data analysis strategies, and temporal resolution of data may partly explain the variation in findings between studies. The current study adds a novel perspective to the literature by investigating specific meteorological factors such as atmospheric pressure, hours of sunshine, relative humidity, and daily maximum and minimum temperatures as more proximal predictors of self-reported daily mood change in people diagnosed with bipolar disorder...
2017: PloS One
https://www.readbyqxmd.com/read/28262145/predictors-of-metabolic-syndrome-in-first-manic-episode
#20
Sermin Kesebir, Boray Erdinç, Nevzat Tarhan
OBJECTIVE: In the present study we aimed to investigate, whether an association between metabolic syndrome (MetS) and clinical features and affective temperaments exists or not in first manic episode of bipolar disorder (BD) and to clarify the prevalence and predictors of MetS. METHOD: A total of 150 patients who were received a diagnosis of bipolar disorder type I according to DSM-IV criteria and who were experiencing their first manic episode (FME) were screened consecutively for inclusion...
February 2017: Asian Journal of Psychiatry
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