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Melatonin and cancer

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https://www.readbyqxmd.com/read/28431312/melatonin-charge-transfer-complex-with-2-3-dichloro-5-6-dicyano-1-4-benzoquinone-molecular-structure-dft-studies-thermal-analyses-evaluation-of-biological-activity-and-utility-for-determination-of-melatonin-in-pure-and-dosage-forms
#1
Gehad G Mohamed, Maher M Hamed, Nadia G Zaki, Mohamed M Abdou, Marwa El-Badry Mohamed, Abanoub Mosaad Abdallah
A simple, accurate and fast spectrophotometric method for the quantitative determination of melatonin (ML) drug in its pure and pharmaceutical forms was developed based on the formation of its charge transfer complex with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as an electron acceptor. The different conditions for this method were optimized accurately. The Lambert-Beer's law was found to be valid over the concentration range of 4-100μgmL(-1) ML. The solid form of the CT complex was structurally characterized by means of different spectral methods...
April 4, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28422711/melatonin-exerts-anti-oral-cancer-effect-via-suppressing-lsd1-in-patient-derived-tumor-xenograft-models
#2
Cheng-Yu Yang, Chih-Kung Lin, Chang-Huei Tsao, Cheng-Chih Hsieh, Gu-Jiun Lin, Kuo-Hsing Ma, Yi-Shing Shieh, Huey-Kang Sytwu, Yuan-Wu Chen
Aberrant activation of histone lysine-specific demethylase (LSD1) increases tumorigenicity; hence, LSD1 is considered a therapeutic target for various human cancers. Although melatonin, an endogenously produced molecule, may defend against various cancers, the precise mechanism involved in its anti-oral cancer effect remains unclear. Patient-derived tumor xenograft (PDTX) models are preclinical models that can more accurately reflect human tumor biology compared with cell line xenograft models. Here, we evaluated the anticancer activity of melatonin by using LSD1-overexpressing oral cancer PDTX models...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28420185/melatonin-a-full-service-anti-cancer-agent-inhibition-of-initiation-progression-and-metastasis
#3
REVIEW
Russel J Reiter, Sergio A Rosales-Corral, Dun-Xian Tan, Dario Acuna-Castroviejo, Lilan Qin, Shun-Fa Yang, Kexin Xu
There is highly credible evidence that melatonin mitigates cancer at the initiation, progression and metastasis phases. In many cases, the molecular mechanisms underpinning these inhibitory actions have been proposed. What is rather perplexing, however, is the large number of processes by which melatonin reportedly restrains cancer development and growth. These diverse actions suggest that what is being observed are merely epiphenomena of an underlying more fundamental action of melatonin that remains to be disclosed...
April 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28415828/melatonin-for-the-prevention-and-treatment-of-cancer
#4
REVIEW
Ya Li, Sha Li, Yue Zhou, Xiao Meng, Jiao-Jiao Zhang, Dong-Ping Xu, Hua-Bin Li
The epidemiological studies have indicated a possible oncostatic property of melatonin on different types of tumors. Besides, experimental studies have documented that melatonin could exert growth inhibition on some human tumor cells in vitro and in animal models. The underlying mechanisms include antioxidant activity, modulation of melatonin receptors MT1 and MT2, stimulation of apoptosis, regulation of pro-survival signaling and tumor metabolism, inhibition on angiogenesis, metastasis, and induction of epigenetic alteration...
March 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28413320/panax-ginseng-meyer-prevents-radiation-induced-liver-injury-via-modulation-of-oxidative-stress-and-apoptosis
#5
Hyeong-Geug Kim, Seong-Soon Jang, Jin-Seok Lee, Hyo-Seon Kim, Chang-Gue Son
BACKGROUND: Radiotherapy is one of the most important modalities in cancer treatment; however, normal tissue damage is a serious concern. Drug development for the protection or reduction of normal tissue damage is therefore a clinical issue. Herein, we evaluated the protective properties of Panax ginseng Meyer and its corresponding mechanisms. METHODS: C56BL/6 mice were orally pretreated with P. ginseng water extract (PGE; 25 mg/kg, 50 mg/kg, or 100 mg/kg) or intraperitoneally injected melatonin (20 mg/kg) for 4 d consecutively, then exposed to 15-Gy X-ray radiation 1 h after the last administration...
April 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28403142/melatonin-protects-rats-from-radiotherapy-induced-small-intestine-toxicity
#6
Beatriz Fernández-Gil, Ahmed E Abdel Moneim, Francisco Ortiz, Ying-Qiang Shen, Viviana Soto-Mercado, Miguel Mendivil-Perez, Ana Guerra-Librero, Darío Acuña-Castroviejo, María M Molina-Navarro, José M García-Verdugo, Ramy K A Sayed, Javier Florido, Juan D Luna, Luis Carlos López, Germaine Escames
Radiotherapy-induced gut toxicity is among the most prevalent dose-limiting toxicities following radiotherapy. Prevention of radiation enteropathy requires protection of the small intestine. However, despite the prevalence and burden of this pathology, there are currently no effective treatments for radiotherapy-induced gut toxicity, and this pathology remains unclear. The present study aimed to investigate the changes induced in the rat small intestine after external irradiation of the tongue, and to explore the potential radio-protective effects of melatonin gel...
2017: PloS One
https://www.readbyqxmd.com/read/28400824/melatonin-and-human-mitochondrial-diseases
#7
REVIEW
Reza Sharafati-Chaleshtori, Hedayatollah Shirzad, Mahmoud Rafieian-Kopaei, Amin Soltani
Mitochondrial dysfunction is one of the main causative factors in a wide variety of complications such as neurodegenerative disorders, ischemia/reperfusion, aging process, and septic shock. Decrease in respiratory complex activity, increase in free radical production, increase in mitochondrial synthase activity, increase in nitric oxide production, and impair in electron transport system and/or mitochondrial permeability are considered as the main factors responsible for mitochondrial dysfunction. Melatonin, the pineal gland hormone, is selectively taken up by mitochondria and acts as a powerful antioxidant, regulating the mitochondrial bioenergetic function...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28398226/melatonin-reduces-angiogenesis-in-serous-papillary-ovarian-carcinoma-of-ethanol-preferring-rats
#8
Yohan Ricci Zonta, Marcelo Martinez, Isabel Cristina C Camargo, Raquel F Domeniconi, Luiz Antonio Lupi Júnior, Patricia Fernanda F Pinheiro, Russel J Reiter, Francisco Eduardo Martinez, Luiz Gustavo A Chuffa
Angiogenesis is a hallmark of ovarian cancer (OC); the ingrowth of blood vessels promotes rapid cell growth and the associated metastasis. Melatonin is a well-characterized indoleamine that possesses important anti-angiogenic properties in a set of aggressive solid tumors. Herein, we evaluated the role of melatonin therapy on the angiogenic signaling pathway in OC of an ethanol-preferring rat model that mimics the same pathophysiological conditions occurring in women. OC was chemically induced with a single injection of 7,12-dimethylbenz(a)anthracene (DMBA) under the ovarian bursa...
April 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28391184/thioredoxin-1-modulates-apoptosis-induced-by-bioactive-compounds-in-prostate-cancer-cells
#9
Aida Rodriguez-Garcia, David Hevia, Juan C Mayo, Pedro Gonzalez-Menendez, Lucia Coppo, Jun Lu, Arne Holmgren, Rosa M Sainz
Accumulating evidence suggests that natural bioactive compounds, alone or in combination with traditional chemotherapeutic agents, could be used as potential therapies to fight cancer. In this study, we employed four natural bioactive compounds (curcumin, resveratrol, melatonin, and silibinin) and studied their role in redox control and ability to promote apoptosis in androgen sensitive and insensitive prostate cancer cells. Here is shown that curcumin and resveratrol promote ROS production and induce apoptosis in LNCaP and PC-3...
March 31, 2017: Redox Biology
https://www.readbyqxmd.com/read/28382516/ramelteon-a-selective-mt1-mt2-receptor-agonist-suppresses-the-proliferation-and-invasiveness-of-endometrial-cancer-cells
#10
Kiyono Osanai, Yoichi Kobayashi, Masahiro Otsu, Tomoko Izawa, Keiji Sakai, Mitsutoshi Iwashita
The incidence of endometrial cancer is increasing, making it the fifth most common cancer worldwide. To date, however, there is no standard therapy for patients with recurrent endometrial cancer. Melatonin, a hormone secreted by the pineal gland, has been shown to have anti-tumor effects in various tumor types. Although melatonin is available as a supplement, it has not been approved for cancer treatment. Ramelteon, a selective melatonin receptor type 1 and 2 (MT1/MT2) receptor agonist, has been approved to treat sleep disorders, suggesting that ramelteon may be effective in the treatment of endometrial cancer...
April 5, 2017: Human Cell
https://www.readbyqxmd.com/read/28364111/-inhibitory-effects-of-melatonin-on-breast-cancer
#11
Zhou Jiang, Fang Ma
Melatonin has a significant inhibitory effect on various cancers, especially on breast cancer. In estrogen receptor (ER)-positive human breast cancer, anti-cancer effects of melatonin on breast cancer cells and transplanted tumors mainly achieve by suppressing ER mRNA expression and ER transcriptional activity via the MT1 receptor. In addition, melatonin regulates the transactivation of other members of the nuclear receptor super-family, estrogen metabolizing enzymes, and the expression of related genes. Furthermore, melatonin also suppresses tumor aerobic metabolism, critical cell-signaling pathways relevant to cell proliferation, survival, metastasis, and drug resistance...
March 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28335402/2-hydroxymelatonin-a-predominant-hydroxylated-melatonin-metabolite-in-plants-shows-antitumor-activity-against-human-colorectal-cancer-cells
#12
Yi Yang, Rui Zhou, So-Yeon Park, Kyoungwhan Back, Woo Kyun Bae, Kyung Keun Kim, Hangun Kim
2-Hydroxymelatonin is a predominant hydroxylated melatonin metabolite in plants. To investigate whether it has potent cytotoxic effects on colorectal cancer cells, four colorectal cancer cell lines, Caco2, HCT116, DLD1, and CT26, were treated with 2-hydroxymelatonin and melatonin. 2-Hydroxymelatonin had a much lower IC50 value than melatonin in the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The cytotoxic effect of 2-hydroxymelatonin was much stronger than that of melatonin at high concentrations (1000 or 2000 μM) in HCT116, DLD1, and CT26 cells, but only at intermediate concentrations (250 or 500 μM) in Caco2 cells...
March 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28322972/potential-role-of-cyp1b1-in-the-development-and-treatment-of-metabolic-diseases
#13
REVIEW
Fei Li, Weifeng Zhu, Frank J Gonzalez
Cytochrome P450 1B1 (CYP1B1), a member of CYP450s, is expressed in liver and extrahepatic tissues carries out the metabolism of numerous xenobiotics, including the metabolic activation of polycyclic aromatic hydrocarbons. Surprisingly, CYP1B1 was also shown to be important in regulating endogenous metabolic pathways, including the metabolism of steroid hormones, fatty acids, melatonin, and vitamins. CYP1B1 and nuclear receptors including peroxisome proliferator-activated receptors (PPARs), estrogen receptor (ER), and retinoic acid receptors (RAR) contribute to the maintenance of the homeostasis of these endogenous compounds...
March 16, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28272467/meta-analysis-identifies-novel-risk-loci-and-yields-systematic-insights-into-the-biology-of-male-pattern-baldness
#14
Stefanie Heilmann-Heimbach, Christine Herold, Lara M Hochfeld, Axel M Hillmer, Dale R Nyholt, Julian Hecker, Asif Javed, Elaine G Y Chew, Sonali Pechlivanis, Dmitriy Drichel, Xiu Ting Heng, Ricardo C-H Del Rosario, Heide L Fier, Ralf Paus, Rico Rueedi, Tessel E Galesloot, Susanne Moebus, Thomas Anhalt, Shyam Prabhakar, Rui Li, Stavroula Kanoni, George Papanikolaou, Zoltán Kutalik, Panos Deloukas, Michael P Philpott, Gérard Waeber, Tim D Spector, Peter Vollenweider, Lambertus A L M Kiemeney, George Dedoussis, J Brent Richards, Michael Nothnagel, Nicholas G Martin, Tim Becker, David A Hinds, Markus M Nöthen
Male-pattern baldness (MPB) is a common and highly heritable trait characterized by androgen-dependent, progressive hair loss from the scalp. Here, we carry out the largest GWAS meta-analysis of MPB to date, comprising 10,846 early-onset cases and 11,672 controls from eight independent cohorts. We identify 63 MPB-associated loci (P<5 × 10(-8), METAL) of which 23 have not been reported previously. The 63 loci explain ∼39% of the phenotypic variance in MPB and highlight several plausible candidate genes (FGF5, IRF4, DKK2) and pathways (melatonin signalling, adipogenesis) that are likely to be implicated in the key-pathophysiological features of MPB and may represent promising targets for the development of novel therapeutic options...
March 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28255737/melatonin-as-an-anti-inflammatory-agent-in-radiotherapy
#15
REVIEW
M Najafi, A Shirazi, E Motevaseli, A H Rezaeyan, A Salajegheh, S Rezapoor
Radiotherapy is one of the most relevant treatment options for cancer therapy with or without other treatment modalities including immunotherapy, surgery and chemotherapy. Exposure to heavy doses of ionizing radiation during radiotherapy results in short and long term side effects. It appears that many of these side effects are linked to inflammatory responses during treatment or after prolonged use. Inflammation is mediated by various genes and cytokines related to immune system responses caused by massive cell death following radiotherapy...
March 2, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28246472/melatonin-a-novel-selective-atf-6-inhibitor-induces-human-hepatoma-cell-apoptosis-through-cox-2-downregulation
#16
Li-Jia Bu, Han-Qing Yu, Lu-Lu Fan, Xiao-Qiu Li, Fang Wang, Jia-Tao Liu, Fei Zhong, Cong-Jun Zhang, Wei Wei, Hua Wang, Guo-Ping Sun
AIM: To clarify the mechanisms involved in the critical endoplasmic reticulum (ER) stress initiating unfolded protein response pathway modified by melatonin. METHODS: Hepatoma cells, HepG2, were cultured in vitro. Flow cytometry and TUNEL assay were used to measure HepG2 cell apoptosis. Western blotting and quantitative reverse transcription-polymerase chain reaction methods were used to determine the protein and messenger RNA levels of ER stress and apoptosis related genes' expression, respectively...
February 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28228077/antioxidant-nanoplatforms-for-dermal-delivery-melatonin
#17
Aroha Belen Sánchez Milán, Ana C Calpena Campmany, Beatriz Clares Naveros
Melatonin (MLT) is emerging as a promising therapeutic agent, mainly due to its role as antioxidant. Substantial evidences show that melatonin is potentially effective on a variety of diseases as cancer, inflammation and neurodegenerative diseases. The excellent antioxidant capacity with pharmacokinetics characteristics and the emerging search for new pharmaceutical nanotechnology based systems, make it particularly attractive to elaborate nanoplatforms based on MLT for biomedical or cosmetic dermal applications...
February 22, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28214594/association-between-light-at-night-melatonin-secretion-sleep-deprivation-and-the-internal-clock-health-impacts-and-mechanisms-of-circadian-disruption
#18
REVIEW
Yvan Touitou, Alain Reinberg, David Touitou
Exposure to Artificial Light At Night (ALAN) results in a disruption of the circadian system, which is deleterious to health. In industrialized countries, 75% of the total workforce is estimated to have been involved in shift work and night work. Epidemiologic studies, mainly of nurses, have revealed an association between sustained night work and a 50-100% higher incidence of breast cancer. The potential and multifactorial mechanisms of the effects include the suppression of melatonin secretion by ALAN, sleep deprivation, and circadian disruption...
March 15, 2017: Life Sciences
https://www.readbyqxmd.com/read/28152213/melatonin-signaling-in-t-cells-functions-and-applications
#19
REVIEW
Wenkai Ren, Gang Liu, Shuai Chen, Jie Yin, Jing Wang, Bie Tan, Guoyao Wu, Fuller W Bazer, Yuanyi Peng, Tiejun Li, Russel J Reiter, Yulong Yin
Melatonin affects a variety of physiological processes including circadian rhythms, cellular redox status, and immune function. Importantly, melatonin significantly influences T-cell-mediated immune responses, which are crucial to protect mammals against cancers and infections, but are associated with pathogenesis of many autoimmune diseases. This review focuses on our current understanding of the significance of melatonin in T-cell biology and the beneficial effects of melatonin in T-cell response-based diseases...
February 2, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28151704/urinary-melatonin-in-relation-to-postmenopausal-breast-cancer-risk-according-to-melatonin-1-receptor-status
#20
Elizabeth E Devore, Erica T Warner, A Heather Eliassen, Susan B Brown, Andrew H Beck, Susan E Hankinson, Eva S Schernhammer
Background: Urinary melatonin levels have been associated with a reduced risk of breast cancer in postmenopausal women, but this association might vary according to tumor melatonin 1 receptor (MT1R) expression.Methods: We conducted a nested case-control study among 1,354 postmenopausal women in the Nurses' Health Study, who were cancer free when they provided first-morning spot urine samples in 2000 to 2002; urine samples were assayed for 6-sulfatoxymelatonin (aMT6s, a major metabolite of melatonin). Five-hundred fifty-five of these women developed breast cancer before May 31, 2012, and were matched to 799 control subjects...
March 2017: Cancer Epidemiology, Biomarkers & Prevention
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