Exploratory laser flash photolysis study of free radical reactions and magnetic field effects in melatonin chemistry.

abstract：:Chronic hyperhomocysteinemia is a risk factor in cardiovascular diseases and neurodegeneration. Among the putative mechanisms of homocysteine-induced neurotoxicity, an increased production of reactive oxygen species has been suggested. However, elevated homocysteine levels might disturb neurogenesis during brain devel...

journal_title：Journal of pineal research

authors： Baydas G,Koz ST,Tuzcu M,Nedzvetsky VS

更新日期：2008-03-01 00:00:00

abstract：:The antioxidant and anti-inflammatory effects of melatonin on kainic acid (KA)-induced neurodegeneration in the hippocampus were evaluated in vivo. It has been suggested that the pineal secretory product, melatonin, protects neurons in vitro from excitotoxicity mediated by kainate-sensitive glutamate receptors, and fr...

journal_title：Journal of pineal research

authors： Chung SY,Han SH

更新日期：2003-03-01 00:00:00

abstract：:Melatonin is involved in the control of various physiological functions, such as sleep, cell growth and free radical scavenging. The ability of melatonin to behave as an antioxidant, together with the fact that the Alzheimer-related amyloid β-peptide (Aβ) triggers oxidative stress through hydroxyl radical-induced cell...

journal_title：Journal of pineal research

authors： Panmanee J,Nopparat C,Chavanich N,Shukla M,Mukda S,Song W,Vincent B,Govitrapong P

更新日期：2015-10-01 00:00:00

abstract：:Melatonin has been shown to improve in vitro fertilization and offspring survival after bacterial infection, but its role in regulating maternal-fetal communication during early pregnancy has not been investigated. Results of this study demonstrated expression of abundant melatonin receptors in conceptus and endometri...

journal_title：Journal of pineal research

authors： Bae H,Yang C,Lee JY,Park S,Bazer FW,Song G,Lim W

更新日期：2020-09-01 00:00:00

abstract：:Djungarian hamsters kept in long photoperiod (16:8 L:D) were injected daily at 0800, 1200, or 1600 with 25 micrograms of melatonin. During 90 days of treatment, body weight and fur coloration were checked at weekly intervals, and at the end of the treatment the reproductive status of the hamsters and their thermoregul...

journal_title：Journal of pineal research

authors： Holtorf AP,Heldmaier G,Thiele G,Steinlechner S

更新日期：1985-01-01 00:00:00

abstract：:Previous data have demonstrated that a single 1-hr light pulse at night affects the secretion of melatonin in the ram if it was given at the appropriate time. This paper reports the effect on melatonin secretion of a 1-hr light pulse given at two different times at night to two groups of rams kept in constant darkness...

journal_title：Journal of pineal research

authors： Ravault JP,Chesneau D

更新日期：1996-11-01 00:00:00

abstract：:Female Syrian hamsters were kept in a light (14:10 h light:dark cycle, lights on 0600 h)- and temperature (22 or 30 degrees C)-controlled room; some groups were treated with an afternoon s.c. injection of melatonin (6.25, 12.5, or 25 micrograms/day) for 11 or 14 weeks. The melatonin-induced suppression of the reproduc...

journal_title：Journal of pineal research

authors： Reiter RJ,Li K,Gonzalez-Brito A,Tannenbaum MG,Vaughan MK,Vaughan GM,Villanua MA

更新日期：1988-01-01 00:00:00

abstract：:The effect of melatonin on thrombin-induced [3H]-arachidonic acid (AA) metabolism to cyclooxygenase derivatives was determined in platelets obtained from normal volunteers at 0830 and 2030 h. Percent conversion of radioactive AA was generally greater at 2030 h than at 0830 h for every cyclooxygenase derivative analyze...

journal_title：Journal of pineal research

authors： Martinuzzo M,Del Zar MM,Cardinali DP,Carreras LO,Vacas MI

更新日期：1991-10-01 00:00:00

abstract：:Excessive activity of NADPH oxidase (Nox) is considered to be of importance for the progress of diabetic nephropathy. The aim of the study was to elucidate the effect of melatonin, known for its nephroprotective properties, on Nox activity under diabetic conditions. The experiments were performed on three groups of an...

journal_title：Journal of pineal research

authors： Winiarska K,Dzik JM,Labudda M,Focht D,Sierakowski B,Owczarek A,Komorowski L,Bielecki W

更新日期：2016-01-01 00:00:00

abstract：:The activity of N-acetyltransferase (NAT) and the content of melatonin (MEL) in the rat pineal have been shown to be sensitive to several types of stressors. This study was designed to assess the role of the adrenals in mediating the effect of one such stressor, insulin-induced hypoglycemia, on pineal synthetic activi...

journal_title：Journal of pineal research

authors： Tannenbaum MG,Reiter RJ,Vaughan MK,Troiani ME,Gonzalez-Brito A

更新日期：1987-01-01 00:00:00

abstract：:Melatonin has been identified in primitive photosynthetic bacteria, fungi, plants, and animals including humans. Vegetables, fruits, cereals, wine, and beers all contain melatonin. However, the melatonin content in meats has not been reported previously. Here, for the first time, we report melatonin in meats, eggs, co...

journal_title：Journal of pineal research

authors： Tan DX,Zanghi BM,Manchester LC,Reiter RJ

更新日期：2014-09-01 00:00:00

abstract：:The production of oxygen free radicals has been strongly implicated as an important pathophysiological mechanism mediating myocardial ischemia/reperfusion (I/R) injury. Various antioxidants have cardioprotective effects. Melatonin, an indoleamine synthesized by the pineal gland, is a potent antioxidant and a direct fr...

journal_title：Journal of pineal research

authors： Lee YM,Chen HR,Hsiao G,Sheu JR,Wang JJ,Yen MH

更新日期：2002-09-01 00:00:00

abstract：:Dim light exposure of the mother during pregnancy has been proposed as one of the environmental factors that affect the fetal brain development in schizophrenia. Melatonin circulating levels are regulated by the environmental light/dark cycle. This hormone stimulates neuronal differentiation in the adult brain. Howeve...

journal_title：Journal of pineal research

authors： Galván-Arrieta T,Trueta C,Cercós MG,Valdés-Tovar M,Alarcón S,Oikawa J,Zamudio-Meza H,Benítez-King G

更新日期：2017-10-01 00:00:00

abstract：:Melatonin plays an important role in regulating circadian rhythms. It also acts as a potent antioxidant and regulates glucose and lipid metabolism, although the exact action mechanism is not clear. The α2-HS-glycoprotein gene (AHSG) and its protein, fetuin-A (FETUA), are one of the hepatokines and are known to be asso...

journal_title：Journal of pineal research

authors： Heo JI,Yoon DW,Yu JH,Kim NH,Yoo HJ,Seo JA,Kim SG,Choi KM,Baik SH,Choi DS,Kim NH

更新日期：2018-09-01 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

authors： Yang Y,Sun Y,Yi W,Li Y,Fan C,Xin Z,Jiang S,Di S,Qu Y,Reiter RJ,Yi D

更新日期：2014-11-01 00:00:00

abstract：:Irradiation of the melatonin metabolite N(1)-acetyl-N(2)-formyl-5-methoxykynuramine (AFMK) with UV light of 254 nm causes the release of carbon monoxide (CO) and, thus, deformylation to N(1)-acetyl-5-methoxykynuramine (AMK). Liberation of CO was demonstrated by reduction of PdCl(2) to metallic palladium, under avoidan...

journal_title：Journal of pineal research

authors： Seever K,Hardeland R

更新日期：2008-05-01 00:00:00

abstract：:Autophagy is an important survival pathway and participates in the host response to infection. Beneficial effects of melatonin have been previously reported in an animal model of acute liver failure (ALF) induced by the rabbit hemorrhagic disease virus (RHDV). This study was aimed to investigate whether melatonin prot...

journal_title：Journal of pineal research

authors： San-Miguel B,Crespo I,Vallejo D,Álvarez M,Prieto J,González-Gallego J,Tuñón MJ

更新日期：2014-04-01 00:00:00

abstract：:The protective role of exogenous melatonin on U-induced nephrotoxicity was investigated in rats. Animals were given single doses of uranyl acetate dihydrate (UAD) at 5 mg/kg (subcutaneous), melatonin at 10 or 20 mg/kg (intraperitoneal), and UAD (5 mg/kg) plus melatonin (10 or 20 mg/kg), or vehicle (control group). In ...

journal_title：Journal of pineal research

authors： Bellés M,Linares V,Luisa Albina M,Sirvent J,Sánchez DJ,Domingo JL

更新日期：2007-08-01 00:00:00

abstract：:The circadian system comprises several peripheral oscillators and a central rhythm generator that, in mammals, is located in the suprachiasmatic nucleus of the hypothalamus. Expression of clock genes is a characteristic feature of the central rhythm generator and the peripheral oscillators. With regard to the rhythmic...

journal_title：Journal of pineal research

authors： Torres-Farfan C,Serón-Ferré M,Dinet V,Korf HW

更新日期：2006-01-01 00:00:00

abstract：:The association of seasonal changes in health and disease has been known for centuries. The prevalence of psychopathological symptoms with seasonal fluctuations and the use of melatonin as a biological marker of circadian and circannual rhythms is well documented. The aim of this work was to study the variability of m...

journal_title：Journal of pineal research

authors： Morera AL,Abreu P

更新日期：2006-10-01 00:00:00

abstract：:The binding characteristics of the tritiated pineal hormone, [3H] melatonin, were studied in brain tissues using in vitro binding techniques. In synaptosomal membranes prepared from rat hippocampus and subjected to preincubation at 37 degrees C and multiple washings, high-affinity binding of [3H] melatonin significant...

journal_title：Journal of pineal research

authors： Niles LP

更新日期：1987-01-01 00:00:00

abstract：:The pineal hormone melatonin, due to its lipophilic nature, has access to every cell and every part of a cell in the body, suggesting that it could exert effects on blood immune cells. The regulation of the activation of monocytes may be important in a number of diseases, especially pathophysiological conditions assoc...

journal_title：Journal of pineal research

authors： Fjaerli O,Lund T,Osterud B

更新日期：1999-01-01 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

authors： Kaur C,Sivakumar V,Lu J,Ling EA

更新日期：2007-04-01 00:00:00

abstract：:In three separate experiments, the effect of acute exposure to either artificial or natural light during darkness of pineal N-acetyltransferase (NAT) activity and melatonin content was studied in the cotton rat (Sigmodon hispidus). The exposure of animals to an artificial-light irradiance of 160,000 microW/cm2 during ...

journal_title：Journal of pineal research

authors： Nürnberger F,Joshi BN,Heinzeller T,Milin J,Reiter RJ

更新日期：1985-01-01 00:00:00

abstract：:We evaluated the feasibility of using morning urine samples in epidemiological studies aimed at clarifying the relationship between nocturnal melatonin levels and breast cancer risk. Initially, a laboratory-based study of 29 women (40- 70 yr old) was performed to examine the correlation between plasma melatonin levels...

journal_title：Journal of pineal research

authors： Cook MR,Graham C,Kavet R,Stevens RG,Davis S,Kheifets L

更新日期：2000-01-01 00:00:00

abstract：:The presence of melatonin and the enzymes (transcripts and activities) involved in its synthesis, i.e. arylalkylamine N-acetyltransferase (AA-NAT) and hydroxyindole-O-methyltransferase (HIOMT), was investigated in the eggs and early embryos of Japanese quail at Hamburger-Hamilton stages 1-10. Melatonin was present in ...

journal_title：Journal of pineal research

authors： Olszańska B,Majewski P,Lewczuk B,Stepińska U

更新日期：2007-04-01 00:00:00

abstract：:Recently, a species-dependent distribution of melatonin binding sites have been found in lamina I-V and lamina X of the spinal cord. In order to learn more about the function of spinal melatonin receptors, we investigated (i) the gene expression for melatonin receptor subtypes in lumbar and thoracal spinal cord tissue...

journal_title：Journal of pineal research

authors： Zahn PK,Lansmann T,Berger E,Speckmann EJ,Musshoff U

更新日期：2003-08-01 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

authors： Callaghan BD

更新日期：1991-01-01 00:00:00

abstract：:Fetal intrauterine growth restriction (IUGR) is a serious pregnancy complication associated with increased rates of perinatal morbidity and mortality, and ultimately with long-term neurodevelopmental impairments. No intervention currently exists that can improve the structure and function of the IUGR brain before birt...

journal_title：Journal of pineal research

authors： Miller SL,Yawno T,Alers NO,Castillo-Melendez M,Supramaniam VG,VanZyl N,Sabaretnam T,Loose JM,Drummond GR,Walker DW,Jenkin G,Wallace EM

更新日期：2014-04-01 00:00:00

abstract：:In previous studies, we have shown that mitochondrial respiratory chain (MRC) activity is decreased in patients with nonalcoholic steatohepatitis and in ob/ob mice and that peroxynitrite plays a pathogenic role. The present study examined whether melatonin, a peroxynitrite scavenger, prevents: (i) the in vitro effects...

journal_title：Journal of pineal research

authors： Solís-Muñoz P,Solís-Herruzo JA,Fernández-Moreira D,Gómez-Izquierdo E,García-Consuegra I,Muñoz-Yagüe T,García Ruiz I

更新日期：2011-08-01 00:00:00