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146 articles concerning extended query  found, showing 1 to 10

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* Search for seasonal rhythmicity of pineal melatonin production in rats under constant laboratory conditions: spectral chronobiological analysis, and relation to solar and geomagnetic variables. med./biol.
Bartsch H, Mecke D, Probst H, Kupper H, Seebald E, Salewski L, Stehle T, Bartsch C (2012), Chronobiol Int 29 (8): 1048 - 1061
Exposure: geomagnetic field

DETAILS * Is newborn melatonin production influenced by magnetic fields produced by incubators? med./biol.
Bellieni CV, Tei M, Iacoponi F, Tataranno ML, Negro S, Proietti F, Longini M, Perrone S, Buonocore G (2012), Early Hum Dev 88 (8): 707 - 710
Aim: To assess melatonin production in a group of newborns exposed to electromagnetic fields within incubators.
Endpoints: endocrine changes (melatonin production)
System: human
Exposure: magnetic field, 50/60 Hz (AC), LF therapeutical/medical device

DETAILS * Effects of power frequency electromagnetic fields on melatonin and sleep in the rat. med./biol.
Dyche J, Anch AM, Fogler KA, Barnett DW, Thomas C (2012), Emerg Health Threats J 5: 10904-1 - 10904-8
Aim: To study the effects of extremely low power frequency magnetic fields on the production of melatonin and the subsequent sleep structure in rats.
Endpoints: endocrine changes (melatonin secretion); sleep (sleep behavior)
System: animal (species/strain): rat/Sprague-Dawley
Exposure: 60 Hz, magnetic field, low frequency field, 50/60 Hz (AC)

* Effects of 1800-MHz Radiofrequency Fields on Circadian Rhythm of Plasma Melatonin and Testosterone in Male Rats. med./biol.
Qin F, Zhang J, Cao H, Yi C, Li JX, Nie J, Chen LL, Wang J, Tong J (2012), J Toxicol Environ Health A 75 (18): 1120 - 1128
Exposure: 1.8 GHz, radio frequency field, microwaves, wireless transmitter (RF)

DETAILS * Signal transduction of the melatonin receptor MT1 is disrupted in breast cancer cells by electromagnetic fields. med./biol.
Girgert R, Hanf V, Emons G, Grundker C (2010), Bioelectromagnetics 31 (3): 237 - 245
Aim: To study the effects of electromagnetic fields on the anti-proliferative effect of melatonin in breast cancer cell lines (melatonin suppresses the cell proliferation of breast cancer cells) expressing different amounts of the melatonin receptor (MT1).
In order to elucidate the underlying mechanism of this action, the regulation of transcription of the breast cancer susceptibility gene BRCA-1 and the expression of a number of other estrogen-regulated genes were analyzed in the presence of melatonin, either in sham exposed cells or in cells exposed to 1.2 µT of a 50 Hz electromagnetic field.
Endpoints: cell function (signal transduction of the melatonin receptor MT1 in breast cancer cells)
System: intact cell/cell culture (in vitro): MCF-7 (breast cancer cell line, parental cells and cells transfected with the MT1 gene (for the membrane-bound melatonin receptor))
Exposure: 50 Hz, magnetic field, 50/60 Hz (AC)

* Cryptochrome Mediates Light-Dependent Magnetosensitivity of Drosophila's Circadian Clock. med./biol.
Yoshii T, Ahmad M, Helfrich-Forster C (2009), PLoS Biol 7 (4): e86
Exposure: static magnetic field

DETAILS * Geomagnetic activity and human melatonin metabolite excretion. med./biol.
Burch JB, Reif JS, Yost MG (2008), Neurosci Lett 438 (1): 76 - 79
Aim: To evaluate the relationship between geomagnetic activity and overnight excretion of the melatonin metabolite, 6-hydroxymelatonin sulfate, and potential modifications by ambient light and 60 Hz MF exposure among male electric utility workers.
Endpoints: endocrine changes ( overnight melatonin metabolite excretion)
System: human
Exposure: geomagnetic field, 50/60 Hz (AC), occupational exposure

DETAILS * Effects of mobile phone electromagnetic fields at nonthermal SAR values on melatonin and body weight of Djungarian hamsters (Phodopus sungorus). med./biol.
Lerchl A, Kruger H, Niehaus M, Streckert JR, Bitz AK, Hansen V (2008), J Pineal Res 44 (3): 267 - 272
Aim: This in vivo study was performed to assess the effects of chronic radio frequency electromagnetic fields exposure on hamster body weight as an indicator of metabolic changes.
Endpoints: endocrine changes (metabolic effects (body weight, melatonin levels))
System: animal (species/strain): Djungarian hamster (Phodopus sungorus)
Exposure: 383 MHz - 1.8 GHz, mobile communication system, digital mobile phone, GSM, TETRA/TETRAPOL

DETAILS * Biomonitoring of estrogen and melatonin metabolites among women residing near radio and television broadcasting transmitters. med./biol.
Clark ML, Burch JB, Yost MG, Zhai Y, Bachand AM, Fitzpatrick CT, Ramaprasad J, Cragin LA, Reif JS (2007), J Occup Environ Med 49 (10): 1149 - 1156
Aim: To test the hypothesis that radiofrequency or 60 Hz exposures reduce melatonin and increase estrogen production, the authors measured a urinary metabolite of each hormone among women living in a community with increased radiofrequency power densities from nearby radio and TV broadcasting antennae.
Endpoints: endocrine changes (melatonin and estrogen production)
System: human
Exposure: 60 Hz - 3 GHz, Radio/TV transmitter, 50/60 Hz (AC), residential exposure

DETAILS * Effect of short-wave (6-22 MHz) magnetic fields on sleep quality and melatonin cycle in humans: the Schwarzenburg shut-down study. med./biol.
Altpeter ES, Röösli M, Battaglia M, Pfluger D, Minder CE, Abelin T (2006), Bioelectromagnetics 27 (2): 142 - 150
Aim: This study describes the results of a unique "natural experiment" of the operation and cessation of a broadcast transmitter with its short wave electromagnetic fields (6-22 MHz) on sleep quality and melatonin cycle in a general human population sample.
Endpoints: endocrine changes (melatonin cycle); sleep (sleep quality)
System: human
Exposure: 6.1 MHz - 21.8 MHz, radio frequency field, magnetic field

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