Abstract:
:The purpose of this study was to determine whether melatonin treatment would mitigate retinal ganglion cell (RGC) death in the developing retina following a hypoxic insult. Lipid peroxidation (LPO), glutathione (GSH), tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) concentrations, expression of vascular endothelial growth factor receptors, Flt-1 and Flk-1, release of cytochrome c from mitochondria, and caspase-3 expression were examined in the retinas of 1-day-old rats at 3 hr to 14 days after a hypoxic exposure. The mRNA and protein expression of Flt-1 and Flk-1 and the tissue concentration of LPO, TNF-α, and IL-1β were upregulated significantly after the hypoxic exposure, whereas the content of GSH was decreased significantly. RGC cultures also showed increased LPO and decreased GSH levels after hypoxic exposure but these effects were reversed in cells treated with melatonin. TNF-α and IL-1β expression was specifically located on microglial cells, whereas Flt-1 and Flk-1 was limited to RGCs as confirmed by double immunofluorescence labeling. Cultures of hypoxic microglial cells treated with melatonin showed a significant reduction in the release of these cytokines as compared to untreated hypoxic cells. Hypoxia induced increase in the cytosolic cytochrome c and caspase-3 in RGCs was attenuated with melatonin treatment. The results suggest that, in hypoxic injuries, melatonin is neuroprotective to RGCs in the developing retina through its antioxidative, anti-inflammatory, and anti-apoptotic effects. Melatonin suppressed Flt-1 and Flk-1 expression in retinal blood vessels, which may result in reduced retinal vascular permeability and it also preserved mitochondrial function as shown by a reduction in cytochrome c leakage into the cytosol. The results may have therapeutic implications for the management of retinopathy of prematurity.
journal_name
J Pineal Resjournal_title
Journal of pineal researchauthors
Kaur C,Sivakumar V,Robinson R,Foulds WS,Luu CD,Ling EAdoi
10.1111/jpi.12016subject
Has Abstractpub_date
2013-03-01 00:00:00pages
190-206issue
2eissn
0742-3098issn
1600-079Xjournal_volume
54pub_type
杂志文章abstract::The aim of this study was to determine, in the rat, the interaction between melatonin and cholecystokinin in the regulation of the ileal interdigestive motility. This was analyzed by the chronic electromyography technique. Ileal motility was defined by the presence of intermittent spike bursts corresponding to the con...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1994.tb00117.x
更新日期:1994-09-01 00:00:00
abstract::Despite state-of-the-art pharmaceutical regimens, continuous improvements in diagnostic techniques as well as refinements in equipment and interventional procedures, many diseases remain refractory to conventional therapies. Recent advances in stem cell (SC) biology have opened an avenue to exploring its therapeutic p...
journal_title:Journal of pineal research
pub_type: 杂志文章,评审
doi:10.1111/jpi.12372
更新日期:2017-03-01 00:00:00
abstract::Possible role of melatonin in the germination of negatively photoblastic and thermosensitive seeds of Phacelia tanacetifolia Benth was studied. Final germination percentage (FGP) was determined in the presence or absence of light at various temperatures, ranging from 0 to 40°C. The highest FGP was determined as 48.7% ...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079X.2011.00947.x
更新日期:2012-04-01 00:00:00
abstract::Melatonin and somatostatin are known to exert similar effects on locomotor activity. We have previously demonstrated that acute melatonin treatment regulates somatostatin receptor function in the rat frontoparietal cortex. However, the effects of subchronic and chronic melatonin treatment on the somatostatin receptor-...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1034/j.1600-079x.2002.02906.x
更新日期:2002-11-01 00:00:00
abstract::This study examined the factors that may be involved in altering the function of pineal gland in hypoxic conditions. Adult Wistar rats were subjected to hypoxia and the pineal gland was examined for the mRNA and protein expression of hypoxia-inducible factor-1alpha (HIF-1alpha), vascular endothelial growth factor (VEG...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079X.2007.00424.x
更新日期:2007-04-01 00:00:00
abstract::Cardiac tissue loss is one of the most important factors leading to the unsatisfactory recovery even after treatment of ischemic heart disease. Melatonin, a circadian molecule with marked antioxidant properties, protects against ischemia-reperfusion (IR) injury. In particular, the myocardial protection of melatonin is...
journal_title:Journal of pineal research
pub_type: 杂志文章,评审
doi:10.1111/jpi.12175
更新日期:2014-11-01 00:00:00
abstract::Production of melatonin in the pineal gland of inbred mice such as C57B1/6J, BALB/c and AKR strains is still a matter of debate. In previous studies, we and other authors showed that these strains of inbred mice have a clear-cut circadian rhythm of serum melatonin and urinary 6-hydroxy-melatonin-sulphate. In contrast,...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1996.tb00249.x
更新日期:1996-04-01 00:00:00
abstract::There is substantial evidence that magnetic field (MF) exposure influences melatonin secretion in animals. However, data on its influence on human melatonin levels are scarce, and seemingly contradictory. Because of its many beneficial effects, very low-frequency MF exposure is used in physiotherapy of some neurologic...
journal_title:Journal of pineal research
pub_type: 临床试验,杂志文章
doi:10.1034/j.1600-079x.2000.290203.x
更新日期:2000-09-01 00:00:00
abstract::The distribution of 14C-Melatonin (14C-MT) after systemic injection was studied in the plasma, cerebrospinal fluid (CSF), and brain of rats. Chromatographic analysis (thin-layer chromatography and high-performance liquid chromatography) indicated that the radioactivity from biological samples taken at various times fo...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1988.tb00787.x
更新日期:1988-01-01 00:00:00
abstract::Melatonin regulates mitogen-activated protein kinase (MAPK) and Akt signaling pathways. The MAPK family mainly includes extracellular signal-regulated kinase (ERK), p38, and c-Jun N-terminal kinase (JNK). Our previous study documented that melatonin delays osteoblast proliferation; however, the mechanism of action of ...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079X.2011.00971.x
更新日期:2012-08-01 00:00:00
abstract::The frequency of mitoses of adrenaline (A) cells and noradrenaline (N) cells in the adrenal medulla of nonoperated (NO), sham-operated (SPX), and pinealectomized (PX) male, 53-day-old Holtzman rats (n = 133) was investigated by means of light microscopy. Animals were killed at eight time points during a standardized 2...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1990.tb00803.x
更新日期:1990-01-01 00:00:00
abstract::Earlier studies showed that melatonin reduced the growth of 17-beta-estradiol (E(2))-induced rat pituitary prolactin-secreting tumor (prolactinoma) in vivo. The mechanisms of melatonin's inhibitory action on the prolactin-secreting tumor were further explored by investigating the in vitro effects of melatonin on the g...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079X.2006.00403.x
更新日期:2007-03-01 00:00:00
abstract::Lower global cognitive function scores are a common symptom of autism spectrum disorders (ASDs). This study investigates the effects of melatonin on hippocampal serine/threonine kinase signaling in an experimental ASD model. We found that chronic melatonin (1.0 or 5.0 mg/kg/day, 28 days) treatment significantly rescue...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/jpi.12081
更新日期:2014-01-01 00:00:00
abstract::The role played by postsynaptic alpha-adrenergic receptors in the stimulation of pineal melatonin production was investigated in the Syrian hamster. The studies were conducted using organ cultured pineal glands collected from both anatomically intact and superior cervical ganglionectomized hamsters. Results obtained i...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1989.tb00437.x
更新日期:1989-01-01 00:00:00
abstract::While ectopic overexpression of serotonin N-acetyltransferase (SNAT) in plants has been accomplished using animal SNAT genes, ectopic overexpression of plant SNAT genes in plants has not been investigated. Because the plant SNAT protein differs from that of animals in its subcellular localization and enzyme kinetics, ...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/jpi.12392
更新日期:2017-04-01 00:00:00
abstract::Diurnal variations in serum melatonin levels and pineal concentrations of serotonin (5-HT), N-acetylserotonin (NAS), 5-hydroxyindole acetic acid (5-HIAA), and melatonin were estimated in adult male Djungarian hamsters kept under long-day (LD 16:8) or short-day (LD 8:16) photoperiods. The nocturnal increase in melatoni...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1992.tb00039.x
更新日期:1992-04-01 00:00:00
abstract::We evaluated the antioxidant property of melatonin as it relates to the vasospastic effect of hydrogen peroxide (H2O2) on the human umbilical artery. Helical sections of umbilical arteries were obtained from healthy pregnant women who were delivered between weeks 37 and 39 of gestation. Changes in maximal potassium ch...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1997.tb00318.x
更新日期:1997-04-01 00:00:00
abstract::In the present paper, binding of melatonin to purified cell nuclei from harderian glands of male and female hamsters was assessed. Binding of 125I-melatonin to cell nuclei fulfills the criteria for binding to a receptor site. Binding kinetics exhibit properties such as dependence on time and temperature as well as rev...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1034/j.1600-079x.2003.00029.x
更新日期:2003-04-01 00:00:00
abstract::The present study analyzes the participation of pineal stalk and superior cervical ganglia (SCG) in the conduction of photic evoked potentials (PEP) to the pineal body (PB) in unanesthetized freely moving rats implanted with semimicroelectrodes. The PEPs were recorded in PB, lateral hypothalamus (LH), and habenular co...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1987.tb00866.x
更新日期:1987-01-01 00:00:00
abstract::Elevated levels of soluble cellular adhesion molecules have been reported in patients with acute coronary syndromes. Likewise, a relation between decreased nocturnal melatonin levels and coronary artery disease has been suggested. The aim of the present study was to investigate the day-night variations in the concentr...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079X.2007.00529.x
更新日期:2008-01-01 00:00:00
abstract::Abnormal proliferation and motility of retinal pigment epithelial cells leads to proliferative vitreoretinopathy (PVR). Melatonin is a known effective antitumour and anti-invasive agent, but whether it affects the formation and underlying mechanisms of PVR remains unclear. In this study, the results of the MTT assay, ...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/jpi.12615
更新日期:2020-01-01 00:00:00
abstract::We tested whether combined melatonin (Mel) and exendin-4 (Ex4) treatment can better preserve glomerular structural integrity after ischemia-reperfusion (IR) injury compared with either alone. Adult male Sprague Dawley rats (n = 50) were equally divided into sham control (SC), IR, IR-Ex4 (10 μg/kg subcutaneously 30 min...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/jpi.12273
更新日期:2015-11-01 00:00:00
abstract::Cell movement is generated by a driving force provided by dynamic cytoskeletal organization. Two main cytoskeletal-dependent features, essential for migration, are the highly cell polarized structure and focal adhesion complexes. Cell migration and substrate anchorage are finely regulated by external signaling exerted...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079X.2008.00600.x
更新日期:2009-01-01 00:00:00
abstract::Melatonin, the main secretory product of the pineal gland, has been shown to be potentially effective in prevention of numerous types of neurodegenerative disorders in which free radical processes are involved. Homocysteine (Hcy), an independent risk factor for atherosclerosis, undergoes auto-oxidation and generates r...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1034/j.1600-079x.2003.02939.x
更新日期:2003-01-01 00:00:00
abstract::Melatonin is found in a wide variety of plant species. Several investigators have studied the physiological roles of melatonin in plants. However, its role is not well understood because of the limited information on its biosynthetic pathway. To clarify melatonin biosynthesis in plants, we isolated a cDNA-coded arylal...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079X.2009.00673.x
更新日期:2009-05-01 00:00:00
abstract::Previously it has been found that pinealectomy in rats was associated with increased small bowel crypt cell proliferation. The hypothalamus is thought to play a role in the neural control of crypt cell proliferation and the pineal gland is known to be functionally connected with this component of the autonomic nervous...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1991.tb00813.x
更新日期:1991-01-01 00:00:00
abstract::Day and nighttime melatonin production in the pineal gland was compared in normal and cardiomyopathic (polydystrophic) adult male Syrian hamsters. These strains of hamsters were selected for comparison because the cardiomyopathetic hamster displays a deficient transmembrane Ca(2+)-pump in a number of tissues, and intr...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/j.1600-079x.1991.tb00472.x
更新日期:1991-10-01 00:00:00
abstract::Melatonin, a neurohormone that binds to two G protein-coupled receptors MT1 and MT2, is involved in pain regulation, but the distinct role of each receptor has yet to be defined. We characterized the nociceptive responses of mice with genetic inactivation of melatonin MT1 (MT1-/- ), or MT2 (MT2-/- ), or both MT1 /MT2 ...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/jpi.12671
更新日期:2020-10-01 00:00:00
abstract::Melatonin receptors play important roles in the regulation of circadian and seasonal rhythms, sleep, retinal functions, the immune system, depression, and type 2 diabetes development. Melatonin receptors are approved drug targets for insomnia, non-24-hour sleep-wake disorders, and major depressive disorders. In mammal...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/jpi.12540
更新日期:2019-03-01 00:00:00
abstract::Melatonin (MEL) has been found in some medicinal and food plants, including grapevine, a commodity of particular interest for the production of wine, a beverage of economic relevance. It has also been suggested that MEL in wine may, at least in part, contribute to the health-promoting properties attributed to this bev...
journal_title:Journal of pineal research
pub_type: 杂志文章
doi:10.1111/jpi.12223
更新日期:2015-05-01 00:00:00