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Expression of melatoninergic receptors in human placental choriocarcinoma cell lines

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TLDR
These results demonstrate, for the first time, the expression of melatonin receptors in human term placental tissues and in choriocarcinoma cells and suggest a possible paracrine/autocrine function for melatonin in human placenta.
Abstract
Lanoix D, Ouellette R, Vaillancourt C. Melatonin crosses the placenta and enters the fetal circulation. Moreover, experimental data suggest a possible influence of melatonin on placental function and fetal development in humans. To date, the expression and role of melatonin receptors in human placenta choriocarcinoma cell lines and in human term placental tissues remain to be elucidated. METHODS AND RESULTS : Results from RT-PCR, western blotting and confocal microscopy demonstrated that the (...)

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Journal ArticleDOI

Extrapineal melatonin: sources, regulation, and potential functions.

TL;DR: The presence of melatonin in extrapineal organs, tissues, and fluids of mammals including humans is emphasized and information related to its peripheral production and regulation of this ubiquitously acting indoleamine is compiled.
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Melatonin—A pleiotropic, orchestrating regulator molecule

TL;DR: Control of electron flux, prevention of bottlenecks in the respiratory chain and electron leakage contribute to the avoidance of damage by free radicals and seem to be important in neuroprotection, inflammatory diseases and, presumably, aging.
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Melatonin membrane receptors in peripheral tissues: distribution and functions.

TL;DR: Melatonin receptor agonists and antagonists have an exciting future since they could define multiple mechanisms by which melatonin modulates the complexity of such a wide variety of physiological and pathological processes.
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Melatonin and stable circadian rhythms optimize maternal, placental and fetal physiology

TL;DR: Melatonin, of both pineal and placental origin, has essential functions in fetal maturation and placenta/uterine homeostasis and a number of conclusions naturally evolve from the data summarized in this review.
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Melatonin receptors: molecular pharmacology and signalling in the context of system bias

TL;DR: Bias at the level of the receptor, by the expression of genetic receptor variants, will be discussed to show how a modified receptor function can have an effect on the risk for common diseases like type 2 diabetes in humans.
References
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Journal ArticleDOI

Control of human luteal steroidogenesis.

TL;DR: Although the agents causing regression of the CL in a non-fertile cycle are not yet known, intra-luteal growth factors and cytokines that modify the action of LH probably contribute to the reduction of StAR expression and the subsequent fall in progesterone production.
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The human myometrium as a target for melatonin.

TL;DR: Results imply that melatonin may have the potential to modulate myometrial function in the human, a finding that could open up new possibilities for the development of novel therapeutic agents.
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Melatonin as a local regulator of human placental function

TL;DR: It is suggested that melatonin may regulate human placental function in a paracrine/autocrine manner, providing evidence for a novel role in human reproduction.
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Circulating Melatonin in Man: Episodic Secretion throughout the Light-Dark Cycle

TL;DR: A sensitive and specific RIA for melatonin has been validated for human plasma andMelatonin was found to be secreted episodically throughout the 24 h in each condition, with secretory episodes clearly present during the waking day in the presence of bright light.
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Effect of melatonin alone or in combination with human chorionic gonadotropin or ovine luteinizing hormone on the in vitro secretion of estrogens or progesterone by granulosa cells of rats.

TL;DR: Results show that, at least over a short period (90 min), melatonin is progonadal, in that it augments gonadotropic stimulation of granulosa cells and leads to increased synthesis of estrogen or progesterone.
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