Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Melatonin levels"”.
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The role of melatonin in peripartum cardiomyopathy
… stress contributes to the pathogenesis of PPCM. Melatonin is a powerful endogenous antioxidant that can limit the damaging effect of oxidative stress. Melatonin levels are known to be altered in sleep disruption, depression and other cardiac diseases. The aim of this study was to determine if …
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Studio dei ritmi circadiani in pazienti in stato vegetativo
… rhythms (sleep-wake, body core temperature and melatonin circadian rhythms) in patients in vegetative state (VS) in basal condition and after nocturnal blue light exposure. Methods: Eight patients in VS underwent two experimental sessions of 48 consecutive hours polysomnography with body core …
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Sleep-wake Cycle Assessment in Type 2 Diabetes and Salivary Melatonin Correlates
… were significant inverse relationships between melatonin collected at two hours before bed time and latency (Ï=-.87; p=.001), wake after sleep onset (Ï =-.69; p=.02) and nocturnal activity (Ï =-.67; p=.03). Latency was inversely correlated with melatonin collected at bed time (Ï =-.69; …
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Characterization of the genetic variability of human arylalklamine-N-acetyltransferase (AA-NAT) and its potential effects on melatonin production and the sleep pattern
… by a circadian rhythm of circulating melatonin levels, which has been attributed to the cyclic expression of its biosynthetic rate-limiting enzyme, arylalkylamine-N-acetyl-transferase (AA-NAT). Genetic variability of the AA-NAT gene may therefore potentially influence sleep patterns in …
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The Environmental Control of Reproduction in the Female Dace, Leuciscus leuciscus
… development and 4) the measurement of serum melatonin levels under different photoperiod regimes. Ovarian development was monitored by endocrinological data, notably serum cycles of 17-oestradiol (E2), testosterone (T), and calcium (as an index of vitellogenin), oocyte diameter, the …
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Influence of Light Exposure on the Melanopsin Driven Pupil Response and Circadian Rhythm
… sleep dysfunction. Release of the sleep hormone melatonin is mediated by the intrinsically photosensitive retinal ganglion cells (ipRGCs). ipRGCs signal environmental light, with pathways to the midbrain to control pupil size and circadian rhythm. Evidence suggests that light exposure plays a …
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Effect of Food Restriction on Serum and Pineal Indoles
… 24 h mean serum tryptophan and serum serotonin levels but an increase in serum melatonin levels. The duration of the night-time melatonin rise was increased secondary to an earlier rise of both pineal and serum melatonin. Such changes in circulating melatonin may account for the gonadal …
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Markers of Circadian Disruption and Reproductive Risk Factors for Breast Cancer
… turn has long been linked to breast cancer. The melatonin hypothesis holds that increased exposure to artificial light at night and resulting inhibition of nocturnal melatonin may account for recent increased breast cancer incidence. Coregulation of melatonin, circulating reproductive hormones …
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Impairment in mitochondrial oxidative phosphorylation alters clock gene expression
… light exposure at night is known to decrease melatonin levels, some researchers have hypothesized that a reduction in the nocturnal levels of this pineal hormone predisposes individuals to disease. Animals that displayed atypical behaviours in their daily cycles, led to the identification of …
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Transplantation of the Mammalian Pineal Gland: Studies of Survival, Revascularization, Reinnervation and Recovery of Function
… regions than in others.</p> <p>Nighttime serum melatonin levels increased significantly in pinealectomized rats with transplants into either the third cerebral ventricle or the anterior eye chamber. This increase might reflect graft reinnervation. Yet day-night differences in serum melatonin …
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Sleeping to perform: examining sleep and exercise in elite female athletes
… Study Four assessed difference between the melatonin and sleep responses to training and non-training days. Study Fix, objectively assessed the effect of an acute sleep hygiene education session on sleep indices via wrist-actigraphy. Finally, Study Six, an observational and longitudinal …
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Melatonin-micronutrients Osteopenia Treatment Study (MOTS): A translational study assessing the effects of melatonin, strontium citrate, vitamin D3 and vitamin K2 on bone density, bone turnover markers and health-related quality of life in postmenopausal osteopenic women following a one-year double-blind randomized placebo-controlled trial and on osteoblast-osteoclast co-cultures
… study was to assess if a novel combination of melatonin and three other natural bone-aiding micronutrients: strontium citrate, vitamins D<sub>3</sub> and K<sub>2</sub> (MSDK) could improve bone health by modulating the activity of osteoblasts and osteoclasts in favor of balanced bone remodeling …