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Seasonal depression

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https://www.readbyqxmd.com/read/28073447/potential-impact-of-an-exceptional-bloom-of-karenia-mikimotoi-on-dissolved-oxygen-levels-in-waters-off-western-ireland
#1
Shane O'Boyle, Georgina McDermott, Joe Silke, Caroline Cusack
In the summer of 2005 an exceptional bloom of the dinoflagellate Karenia mikimotoi occurred along Ireland's Atlantic seaboard and was associated with the mass mortality of both benthic and pelagic marine life. Oxygen depletion, cellular toxicity and physical smothering, are considered to be the main factors involved in mortality. In this paper we use a theoretical approach based on stoichiometry (the Anderson ratio) and an average K. mikimotoi cellular carbon content of 329pgCcell(-1) (n=20) to calculate the carbonaceous and nitrogenous oxygen demand following bloom collapse...
March 2016: Harmful Algae
https://www.readbyqxmd.com/read/28056406/the-impact-of-maternal-factors-on-the-association-between-temperature-and-preterm-delivery
#2
Rupa Basu, Hong Chen, De-Kun Li, Lyndsay A Avalos
BACKGROUND: Few studies have examined maternal modifiers of temperature and adverse birth outcomes because of lack of data. We assessed the relationship between apparent temperature, preterm delivery (PTD) and maternal demographics, medical and mental health conditions, and behaviors. METHODS: A time-stratified case-crossover analysis was conducted using 14,466 women who had a PTD (20 to less than 37 gestational weeks) from 1995 to 2009 using medical records from a large health maintenance organization in Northern California...
January 2, 2017: Environmental Research
https://www.readbyqxmd.com/read/28012610/secondary-to-excessive-melatonin-synthesis-the-consumption-of-tryptophan-from-outside-the-blood-brain-barrier-and-melatonin-over-signaling-in-the-pars-tuberalis-may-be-central-to-the-pathophysiology-of-winter-depression
#3
José Carlos Pereira, Márcia Pradella Hallinan, Rosana Cardoso Alves
Seasonal affective disorder is defined as recurrent episodes of major depression, mania, or hypomania with seasonal onset and remission. In this class of mood disturbances, a unipolar major depressive disorder known as winter depression is common in populations living in northern latitudes far from the equator. Winter depression repeatedly occurs in the autumn or winter and remits in the spring or summer, and its etiopathogenesis is currently unknown. However, one can surmise that excessive melatonin production during the reduced duration of daily sunlight in the autumn and winter plays a role in its pathophysiology...
January 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/27979316/seasonal-mood-changes-in-patients-with-obsessive-compulsive-disorder
#4
Oğuz Tan, Barış Metin, Barış Önen Ünsalver, Gökben Hızlı Sayar
Obsessive-compulsive disorder (OCD) is frequently associated with mood disorders. However, to date, the co-occurrence of OCD with seasonal affective disorder (SAD) has not been investigated. We have aimed to estimate the prevalence of seasonal mood changes in patients with OCD and explore the contribution of seasonality in mood to the severity of OCD. The Seasonal Pattern Assessment Questionnaire (SPAQ), the Yale-Brown Obsession and Compulsion Scale (Y-BOCS), the Hamilton Depression Rating Scale-17 Items (HDRS-17), and the Beck Anxiety Inventory (BAI) were administered to patients with OCD (n=104) and controls (n=125)...
June 16, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27965366/expression-of-cyanobacterial-fbp-sbpase-in-soybean-prevents-yield-depression-under-future-climate-conditions
#5
Iris H Köhler, Ursula M Ruiz-Vera, Andy VanLoocke, Michell L Thomey, Tom Clemente, Stephen P Long, Donald R Ort, Carl J Bernacchi
Predictions suggest that current crop production needs to double by 2050 to meet global food and energy demands. Based on theory and experimental studies, overexpression of the photosynthetic enzyme sedoheptulose-1,7-bisphosphatase (SBPase) is expected to enhance C3 crop photosynthesis and yields. Here we test how expression of the cyanobacterial, bifunctional fructose-1,6/sedoheptulose-1,7-bisphosphatase (FBP/SBPase) affects carbon assimilation and seed yield (SY) in a major crop (soybean, Glycine max). For three growing seasons, wild-type (WT) and FBP/SBPase-expressing (FS) plants were grown in the field under ambient (400 μmol mol(-1)) and elevated (600 μmol mol(-1)) CO2 concentrations [CO2] and under ambient and elevated temperatures (+2...
December 12, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27942239/seasonal-affective-disorder-winter-type-current-insights-and-treatment-options
#6
REVIEW
Ybe Meesters, Marijke Cm Gordijn
Seasonal affective disorder (SAD), winter type, is a seasonal pattern of recurrent major depressive episodes most commonly occurring in autumn or winter and remitting in spring/summer. The syndrome has been well-known for more than three decades, with light treatment being the treatment of first choice. In this paper, an overview is presented of the present insights in SAD. Description of the syndrome, etiology, and treatment options are mentioned. Apart from light treatment, medication and psychotherapy are other treatment options...
2016: Psychology Research and Behavior Management
https://www.readbyqxmd.com/read/27923182/sociodemographic-lifestyle-and-psychosocial-determinants-of-hair-cortisol-in-a-south-london-community-sample
#7
Susanne Fischer, Roman Duncko, Stephani L Hatch, Andrew Papadopoulos, Laura Goodwin, Souci Frissa, Matthew Hotopf, Anthony J Cleare
OBJECTIVE: Hypothalamic-pituitary-adrenal (HPA) measures are crucial for research into stress and stress-related disorders. Most HPA measures fluctuate depending on diurnal rhythms and state confounders. Hair cortisol concentrations (HCC) are less susceptible to such fluctuations, but less is known about trait-like confounders. Using a community sample, we tested the relationship between HCC and a range of variables including demographic variables, hair treatment, and medication, as well as psychosocial variables, namely childhood trauma, critical life events, and depressive symptoms...
November 17, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27919923/clonality-increases-with-snow-depth-in-the-arctic-dwarf-shrub-empetrum-hermaphroditum
#8
Miriam J Bienau, R Lutz Eckstein, Annette Otte, Walter Durka
PREMISE OF THE STUDY: Vegetative reproduction and spread through clonal growth plays an important role in arctic-alpine ecosystems with short cool growing seasons. Local variation in winter snow accumulation leads to discrete habitat types that may provide divergent conditions for sexual and vegetative reproduction. Therefore, we studied variation in clonal structure of a dominant, evergreen, dwarf shrub (Empetrum nigrum s.l. with the two taxa E. nigrum L. s.s. and E. hermaphroditum Hagerup) along a snow cover gradient and compared clonal diversity and spatial genetic structure between habitats...
December 2016: American Journal of Botany
https://www.readbyqxmd.com/read/27912106/a-multicenter-randomized-controlled-trial-for-bright-light-therapy-in-adults-with-intellectual-disabilities-and-depression-study-protocol-and-obstacle-management
#9
Pauline C M Hamers, Heleen M Evenhuis, Heidi Hermans
Due to the limited cognitive and communicative abilities of adults with intellectual disabilities (ID), current treatment options for depression are often limited to lifestyle changes and pharmacological treatment. Bright light therapy (BLT) is an effective intervention for both seasonal and non-seasonal depression in the general population. BLT is an inexpensive, easy to carry out intervention with minimal side effects. However, knowledge on its anti-depressant effect in adults with ID is lacking. Obstacles in realizing a controlled intervention study in this particular study population may have contributed to this lack...
January 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/27903144/parent-burden-in-accessing-outpatient-psychiatric-services-for-adolescent-depression-in-a-large-state-system
#10
Kaitlin P Gallo, S Serene Olin, Amy Storfer-Isser, Briannon C O'Connor, Emma D Whitmyre, Kimberly E Hoagwood, Sarah McCue Horwitz
OBJECTIVE: This study examined barriers facing parents who seek outpatient psychiatric care in a large state system for adolescents with depression. METHODS: A total of 264 outpatient facilities licensed to treat youths in New York were contacted by using a mystery shopper methodology. Callers tracked the number of call attempts, in-person appointments, and other steps required prior to seeing a psychiatrist. RESULTS: Fewer than two-thirds of parents made a psychiatry, therapy, or intake appointment...
December 1, 2016: Psychiatric Services: a Journal of the American Psychiatric Association
https://www.readbyqxmd.com/read/27858294/sleep-quality-morningness-eveningness-preference-mood-profile-and-levels-of-serum-melatonin-in-migraine-patients-a-case-control-study
#11
Hasan Hüseyin Kozak, Murat Boysan, Ali Ulvi Uca, Adem Aydın, İbrahim Kılınç, Emine Genç, Mustafa Altaş, Dilara Cari Güngör, Keziban Turgut, Nejla Özer
The melatonin as the pineal gland's secretory product is implicated in the pathophysiology of migraine. Melatonin has critical functions in human physiology, and research underscores the importance of melatonin in circadian rhythm, sleep, and mood regulation. Clinical observations have indicated that migraine attacks have a seasonal, menstrual, and circadian timing, suggesting that chronobiological mechanisms and their alterations may causally involve in the etiology of the disease. However, the topic has received relatively little attention in the migraine literature...
November 17, 2016: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/27836724/immune-priming-and-portal-of-entry-effectors-improve-response-to-vibrio-infection-in-a-resistant-population-of-the-european-abalone
#12
Bruno Dubief, Flavia L D Nunes, Olivier Basuyaux, Christine Paillard
Since 1997, populations of the European abalone Haliotis tuberculata suffer mass mortalities attributed to the bacterium Vibrio harveyi. These mortalities occur at the spawning season, when the abalone immune system is depressed, and when temperatures exceed 17 °C, leading to favorable conditions for V. harveyi proliferation. In order to identify mechanisms of disease resistance, experimental successive infections were carried out on two geographically distinct Brittany populations: one that has suffered recurrent mortalities (Saint-Malo) and one that has not been impacted by the disease (Molène)...
November 9, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27835725/bright-light-therapy-as-augmentation-of-pharmacotherapy-for-treatment-of-depression-a-systematic-review-and-meta-analysis
#13
Thomas M Penders, Cornel N Stanciu, Alexander M Schoemann, Philip T Ninan, Richard Bloch, Sy A Saeed
Background: Bright light therapy has demonstrated efficacy and is an accepted treatment for seasonal depression. It has been suggested that bright light therapy may have efficacy in nonseasonal depressions. Also, there is evidence that bright light therapy may improve responsiveness to antidepressant pharmacotherapy. Data Sources: We searched PubMed/MEDLINE, PsycINFO, PsycARTICLES, CINAHL, EMBASE, Scopus, and Academic OneFile for English-language literature published between January 1998 and April 2016, using the keywords bright light therapy AND major depression, bright light therapy AND depress*, bright light therapy AND bipolar depression, bright light therapy AND affective disorders, circadian rhythm AND major depression, circadian rhythm AND depress*, and circadian rhythm AND affective disorder...
October 20, 2016: Primary Care Companion to CNS Disorders
https://www.readbyqxmd.com/read/27821359/pupillary-response-abnormalities-in-depressive-disorders
#14
Scott A Laurenzo, Randy Kardon, Johannes Ledolter, Pieter Poolman, Ashley M Schumacher, James B Potash, Jan M Full, Olivia Rice, Anna Ketcham, Cole Starkey, Jess G Fiedorowicz
Depressive disorders lack objective physiological measurements to characterize the affected population and facilitate study of relevant mechanisms. The melanopsin-mediated light signaling pathway may contribute to seasonal variation and can be measured non-invasively by pupillometry. We prospectively studied changes in melanopsin-mediated pupillary constriction in 19 participants with major depressive disorder (MDD) and 10 control across the summer and winter solstices. The melanopsin-mediated response, as measured by the pupil's sustained constriction six s after a high intensity blue light stimulus, was marginally attenuated in those with MDD relative to controls (p=0...
December 30, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27821114/bright-light-therapy-in-pregnant-women-with-major-depressive-disorder-study-protocol-for-a-randomized-double-blind-controlled-clinical-trial
#15
Babette Bais, Astrid M Kamperman, Marjolein D van der Zwaag, Gwen C Dieleman, Hanneke W Harmsen van der Vliet-Torij, Hilmar H Bijma, Ritsaert Lieverse, Witte J G Hoogendijk, Mijke P Lambregtse-van den Berg
BACKGROUND: Depression during pregnancy is a common and high impact disease. Generally, 5-10 % of pregnant women suffer from depression. Children who have been exposed to maternal depression during pregnancy have a higher risk of adverse birth outcomes and more often show cognitive, emotional and behavioural problems. Therefore, early detection and treatment of antepartum depression is necessary. Both psychotherapy and antidepressant medication, first choice treatments in a non-pregnant population, have limitations in treating depression during pregnancy...
November 8, 2016: BMC Psychiatry
https://www.readbyqxmd.com/read/27792402/is-18-f-fdg-pet-suitable-to-predict-clinical-response-to-the-treatment-of-geriatric-depression-a-systematic-review-of-pet-studies
#16
Franco De Crescenzo, Mario Ciliberto, Deny Menghini, Giorgio Treglia, Klaus P Ebmeier, Luigi Janiri
BACKGROUND: Geriatric depression is one of the most common psychiatric disorders in later life. It differs from earlier depression in its presentation, etiology, risk factors, protective factors and outcome. Positron emission tomography (PET) can be used to detect changes in neural circuitry in neuropsychiatric disorders, and several authors have assessed its role in the diagnosis and follow-up of patients with geriatric depression. We reviewed the current evidence on the use of fluorine-18-fluorodeoxyglucose positron emission tomography ((18)F-FDG-PET) in geriatric depressed patients to find predictors of treatment response...
October 28, 2016: Aging & Mental Health
https://www.readbyqxmd.com/read/27768955/seasonal-variations-in-photosystem-i-compared-with-photosystem-ii-of-three-alpine-evergreen-broad-leaf-tree-species
#17
Wei Huang, Ying-Jie Yang, Hong Hu, Shi-Bao Zhang
Low temperature associated with high light can induce photoinhibition of photosystem I (PSI) and photosystem II (PSII). However, the photosynthetic electron flow and specific photoprotective responses in alpine evergreen broad-leaf plants in winter is unclear. We analyzed seasonal changes in PSI and PSII activities, and energy quenching in PSI and PSII in three alpine broad-leaf tree species, Quercus guyavifolia (Fagaceae), Rhododendron decorum (Ericaceae), Euonymus tingens (Celastraceae). In winter, PSII activity remained stable in Q...
December 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27755687/seasonal-control-of-mammalian-energy-balance-recent-advances-in-the-understanding-of-daily-torpor-and-hibernation
#18
Martin Jastroch, Sylvain Giroud, Perry Barrett, Fritz Geiser, Gerhard Heldmaier, Annika Herwig
Endothermic mammals and birds require intensive energy turnover to sustain high body temperatures and metabolic rates. To cope with energetic bottlenecks associated with the change of seasons, and to minimise energy expenditure, complex mechanisms and strategies, such as daily torpor and hibernation, are used. During torpor metabolic depression and low body temperatures save energy. However, these bouts of torpor lasting for hours to weeks are interrupted by active 'euthermic' phases with high body temperatures...
October 18, 2016: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/27741403/symptoms-of-common-mental-disorders-among-professional-football-referees-a-one-season-prospective-study-across-europe
#19
Vincent Gouttebarge, Urban Johnson, Pierre Rochcongar, Philippe Rosier, Gino Kerkhoffs
OBJECTIVE: The primary aim of this study was to determine the prevalence and one-season incidence of symptoms of common mental disorders (CMD; distress, anxiety/depression, sleep disturbance, eating disorders, adverse alcohol use) among European professional football referees. A secondary aim was to explore the view of European professional football referees on consequences, support and needs related to these symptoms. METHODS: An observational prospective cohort study with three measurements over a follow-up period of one season (2015-2016) was conducted among central or assistant professional football referees from Belgium, Finland, France, Germany, Norway, Russia, Scotland and Sweden...
October 14, 2016: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/27723114/identification-of-non-reported-bupropion-metabolites-in-human-plasma
#20
Jamie N Connarn, Ruijuan Luo, Jim Windak, Xinyuan Zhang, Andrew Babiskin, Marisa Kelly, Gloria Harrington, Vicki L Ellingrod, Masoud Kamali, Melvin McInnis, Duxin Sun
Bupropion and its three active metabolites exhibit clinical efficacy in the treatment of major depression, seasonal depression and smoking cessation. The pharmacokinetics of bupropion in humans is highly variable. It is not known if there are any non-reported metabolites formed in humans in addition to the three known active metabolites. This paper reports newly identified and non-reported metabolites of bupropion in human plasma samples. Human subjects were dosed with a single oral dose of 75 mg of an immediate release bupropion HCl tablet...
December 2016: Biopharmaceutics & Drug Disposition
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