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Melanocyte stimulating hormone

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https://www.readbyqxmd.com/read/28936166/nucleus-accumbens-mc4-r-stimulation-reduces-food-and-ethanol-intake-in-adult-rats-regardless-of-binge-like-ethanol-exposure-during-adolescence
#1
Francisca Carvajal, José M Lerma-Cabrera, Manuel Alcaraz-Iborra, Montserrat Navarro, Todd E Thiele, Inmaculada Cubero
The melanocortin (MC) system regulates feeding and ethanol consumption. Recent evidence shows that melanocortin 4 receptor (MC4-R) stimulation within the nucleus accumbens (NAc) elicits anorectic responses and reduces ethanol consumption and ethanol palatability in adult rats. Ethanol exposure during adolescence causes long-lasting changes in neural pathways critically involved in neurobehavioral responses to ethanol. In this regard, binge-like ethanol exposure during adolescence reduces basal alpha-melanocyte-stimulating hormone (α-MSH) and alters the levels of agouti-related peptide (AgRP) in hypothalamic and limbic areas...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28916831/the-melanocortin-signaling-camp-axis-accelerates-repair-and-reduces-mutagenesis-of-platinum-induced-dna-damage
#2
Stuart G Jarrett, Katharine M Carter, Brent J Shelton, John A D'Orazio
Using primary melanocytes and HEK293 cells, we found that cAMP signaling accelerates repair of bi- and mono-functional platinum-induced DNA damage. Elevating cAMP signaling either by the agonistic MC1R ligand melanocyte stimulating hormone (MSH) or by pharmacologic cAMP induction by forskolin enhanced clearance of intrastrand cisplatin-adducts in melanocytes or MC1R-transfected HEK293 cells. MC1R antagonists human beta-defensin 3 and agouti signaling protein blocked MSH- but not forskolin-mediated enhancement of platinum-induced DNA damage...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28915638/oleoylethanolamide-inhibits-%C3%AE-melanocyte-stimulating-hormone-stimulated-melanogenesis-via-erk-akt-and-creb-signaling-pathways-in-b16-melanoma-cells
#3
Juan Zhou, Tong Ren, Ying Li, Anran Cheng, Wanyi Xie, Lanxi Xu, Lu Peng, Jinbin Lin, Lianxiang Lian, Yong Diao, Xin Jin, Lichao Yang
The present study aimed to examine the potential inhibitory activity of oleoylethanolamide (OEA) on α-melanocyte stimulating hormone (α-MSH)-stimulated melanogenesis and the molecular mechanism(s) involved in the process in B16 mouse melanoma cells. Our data demonstrated that OEA markedly inhibited melanin synthesis and tyrosinase activity in α-MSH-stimulated B16 cells. In addition, the expression of melanogenesis-related proteins, such as melanocortin-1 receptor (MC1R), microphthalmia-associated transcription factor (MITF), tyrosinase-related protein-1 (TRP-1) and tyrosinase, was suppressed in a concentration-dependent manner by OEA...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28904020/gtrap3-18-regulates-food-intake-and-body-weight-by-interacting-with-pro-opiomelanocortin
#4
Koji Aoyama, Wattanaporn Bhadhprasit, Masahiko Watabe, Fan Wang, Nobuko Matsumura, Toshio Nakaki
Pro-opiomelanocortin (POMC)-expressing neurons provide α-melanocyte-stimulating hormone (α-MSH), which stimulates melanocortin 4 receptor to induce hypophagia by AMPK inhibition in the hypothalamus. α-MSH is produced by POMC cleavage in secretory granules and released. However, it is not known yet whether any posttranscriptional regulatory mechanism of POMC signaling exists upstream of the secretory granules in neurons. Here we show that glutamate transporter-associated protein 3-18 (GTRAP3-18), an anchor protein that retains interacting proteins in the endoplasmic reticulum, is a critical regulator of food intake and body weight by interacting with POMC...
September 13, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28899502/melaleuca-quinquenervia-essential-oil-inhibits-%C3%AE-melanocyte-stimulating-hormone-induced-melanin-production-and-oxidative-stress-in-b16-melanoma-cells
#5
Wen-Wan Chao, Chia-Chi Su, Hsin-Yi Peng, Su-Tze Chou
BACKGROUND: Essential oils are odorous, volatile products of plant secondary metabolism, which are found in many leaves and stems. They show important biological activities, which account for the development of aromatherapy used in complementary and alternative medicine. The essential oil extracted from Melaleuca quinquenervia (Cav.) S.T. Blake (paperbark) (MQ-EO) has various functional properties. PURPOSE: The aim of this study is to investigate the chemical composition of MQ-EO by using gas chromatography-mass spectrometry (GC-MS) and evaluate its tyrosinase inhibitory activity...
October 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28884442/whitening-and-anti-wrinkle-activities-of-ferulic-acid-isolated-from-tetragonia-tetragonioides-in-b16f10-melanoma-and-ccd-986sk-fibroblast-cells
#6
Hye-Jin Park, Jun-Hyo Cho, Shin-Hyub Hong, Dong-Hee Kim, Hee-Young Jung, In-Kyu Kang, Young-Je Cho
Ferulic acid isolated from Tetragonia tetragonioides was tested for its whitening effect on the B16F10 mouse melanoma cell line and its anti-wrinkle activity on the CCD-986sk human dermal fibroblast cell line. Ferulic acid, one of the primary phenolic compounds that can be isolated from T. tetragonioides, has been reported to show potential as a functional food, for its whitening effect and anti-wrinkle activity. To measure its whitening and anti-wrinkle activities, cells were treated with ferulic acid isolated from T...
September 7, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28878021/ck1%C3%AE-ablation-in-keratinocytes-induces-p53-dependent-sunburn-protective-skin-hyperpigmentation
#7
Chung-Hsing Chang, Che-Jung Kuo, Takamichi Ito, Yu-Ya Su, Si-Tse Jiang, Min-Hsi Chiu, Yi-Hsiung Lin, Andrea Nist, Marco Mernberger, Thorsten Stiewe, Shosuke Ito, Kazumasa Wakamatsu, Yi-An Hsueh, Sheau-Yann Shieh, Irit Snir-Alkalay, Yinon Ben-Neriah
Casein kinase 1α (CK1α), a component of the β-catenin destruction complex, is a critical regulator of Wnt signaling; its ablation induces both Wnt and p53 activation. To characterize the role of CK1α (encoded by Csnk1a1) in skin physiology, we crossed mice harboring floxed Csnk1a1 with mice expressing K14-Cre-ER(T2) to generate mice in which tamoxifen induces the deletion of Csnk1a1 exclusively in keratinocytes [single-knockout (SKO) mice]. As expected, CK1α loss was accompanied by β-catenin and p53 stabilization, with the preferential induction of p53 target genes, but phenotypically most striking was hyperpigmentation of the skin, importantly without tumorigenesis, for at least 9 mo after Csnk1a1 ablation...
September 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28869973/palmitoylation-dependent-activation-of-mc1r-prevents-melanomagenesis
#8
Shuyang Chen, Bo Zhu, Chengqian Yin, Wei Liu, Changpeng Han, Baoen Chen, Tongzheng Liu, Xin Li, Xiang Chen, Chunying Li, Limin Hu, Jun Zhou, Zhi-Xiang Xu, Xiumei Gao, Xu Wu, Colin R Goding, Rutao Cui
The melanocortin-1 receptor (MC1R), a G-protein-coupled receptor, has a crucial role in human and mouse pigmentation. Activation of MC1R in melanocytes by α-melanocyte-stimulating hormone (α-MSH) stimulates cAMP signalling and melanin production and enhances DNA repair after ultraviolet irradiation. Individuals carrying MC1R variants, especially those associated with red hair colour, fair skin and poor tanning ability (denoted as RHC variants), are associated with higher risk of melanoma. However, how MC1R activity is modulated by ultraviolet irradiation, why individuals with red hair are more prone to developing melanoma, and whether the activity of RHC variants might be restored for therapeutic benefit are unknown...
September 21, 2017: Nature
https://www.readbyqxmd.com/read/28860709/%C3%AE-melanocyte-stimulating-hormone-modulates-the-central-acyl-ghrelin-induced-stimulation-of-feeding-gastrointestinal-motility-and-colonic-secretion
#9
Hsien-Hao Huang, Liang-Yu Chen, Ming-Luen Doong, Shi-Chuan Chang, Chih-Yen Chen
BACKGROUND: Acyl ghrelin-induced intake depends on hypothalamic neuropeptide Y and agouti-related protein (AgRP) neurotransmitters. Intracerebroventricular (ICV) injection of AgRP increases feeding through competitive antagonism at melanocortin receptors. ICV administration of α-melanocyte stimulating hormone (α-MSH), a natural antagonist of AgRP, may modulate the acyl ghrelin-induced orexigenic effect. OBJECTIVE: This study aimed to investigate the modulating effect of α-MSH on the central acyl ghrelin-induced food intake, gastrointestinal motility, and colonic secretion in rats...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28835664/the-activation-of-ppar%C3%AE-by-2-4-6-octatrienoic-acid-protects-human-keratinocytes-from-uvr-induced-damages
#10
Enrica Flori, Arianna Mastrofrancesco, Daniela Kovacs, Barbara Bellei, Stefania Briganti, Vittoria Maresca, Giorgia Cardinali, Mauro Picardo
Increasing attention is addressed to identify products able to enhance skin photoprotection and to prevent skin carcinogenesis. Several studies have demonstrated that the α-melanocyte stimulating hormone (αMSH), acting on a functional MC1R, provides a photoprotective effect by inducing pigmentation, antioxidants and DNA repair. We discovered a link between αMSH and the nuclear receptor Peroxisome Proliferator-Activated Receptor-γ (PPARγ), suggesting that some of the αMSH protective effects may be dependent on PPARγ transcriptional activity...
August 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28831862/prunus-mume-extract-exerts-antioxidant-activities-and-suppressive-effect-of-melanogenesis-under-the-stimulation-by-alpha-melanocyte-stimulating-hormone-in-b16-f10-melanoma-cells
#11
KyungBae Pi, KiBeom Lee
In the current study, we examined the antioxidant and skin-whitening properties of Prunus mume extract (PME). The ability of PME to scavenge 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals was investigated in vitro. At a concentration of 1000 μg/mL, PME neutralized >45% free radical activity. Cell viability assessment with the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay revealed that at concentrations <1500 μg/mL, PME does not exert cytotoxic effects on murine B16 melanoma (B16) cells...
October 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28825660/protocatechuic-acid-from-pear-inhibits-melanogenesis-in-melanoma-cells
#12
Xuan T Truong, Seo-Hee Park, Yu-Geon Lee, Hang Yeon Jeong, Jae-Hak Moon, Tae-Il Jeon
Despite the critical role of melanin in the protection of skin against UV radiation, excess production of melanin can lead to hyperpigmentation and skin cancer. Pear fruits are often used in traditional medicine for the treatment of melasma; therefore, we investigated the effects of pear extract (PE) and its component, protocatechuic acid (PCA), on melanogenesis in mouse melanoma cells. We found that PE and PCA significantly suppressed melanin content and cellular tyrosinase activity through a decrease in the expression of melanogenic enzymes and microphthalmia-associated transcription factor (Mitf) in α-melanocyte stimulating hormone-stimulated mouse melanoma cells...
August 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28823078/sesquiterpenes-from-fruits-of-torilis-japonica-with-inhibitory-activity-on-melanin-synthesis-in-b16-cells
#13
Da Hye Song, Yang Hee Jo, Jong Hoon Ahn, Seon Beom Kim, Cheong-Yong Yun, Youngsoo Kim, Bang Yeon Hwang, Mi Kyeong Lee
Melanin, a dark macromolecular pigment, protects skin from harmful damage. However, abnormal accumulation is responsible for hyperpigmentation disorders. Melanogenesis inhibitors have therefore become important constituents in cosmetic products for depigmentation. Torilis japonica Decandolle (Umbelliferae) is a biennial plant which is distributed in East Asia. Fruits of this plant have been used for the treatment of skin disease and inflammation. In our previous study, torilin, a major sesquiterpene of T. japonica, showed an inhibitory effect on melanin production in α-melanocyte stimulating hormone (α-MSH)-activated B16 melanoma cells...
August 19, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28782535/alpha-melanocyte-stimulating-hormone-induced-anorexia-in-japanese-quail-coturnix-japonica-likely-involves-the-ventromedial-hypothalamus-and-paraventricular-nucleus-of-the-hypothalamus
#14
Taylor Lear, Lingbin Liu, Madison O'Donnell, Betty R McConn, D Michael Denbow, Mark A Cline, Elizabeth R Gilbert
Alpha-melanocyte stimulating hormone (α-MSH) reduces food intake in birds and mammals. The objective of this experiment was to determine effects of α-MSH on food and water intake, and hypothalamic c-Fos immunoreactivity and appetite-associated factor mRNA in Japanese quail (Coturnix japonica), a species that has not undergone the same artificial selection for growth-related traits as the chicken. At 7days post-hatch, 3-h-fasted quail were intracerebroventricularly (ICV) injected into the lateral ventricle with 0 (vehicle), 0...
October 1, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28714883/nmr-insights-into-the-structure-function-relationships-in-the-binding-of-melanocortin-analogues-to-the-mc1r-receptor
#15
Maurício Morais, Héctor Zamora-Carreras, Paula D Raposinho, Maria Cristina Oliveira, David Pantoja-Uceda, João D G Correia, M Angeles Jiménez
Linear and cyclic analogues of the α-melanocyte stimulating hormone (α-MSH) targeting the human melanocortin receptor 1 (MC1R) are of pharmacological interest for detecting and treating melanoma. The central sequence of α-MSH (His-Phe-Arg-Trp) has been identified as being essential for receptor binding. To deepen current knowledge on the molecular basis for α-MSH bioactivity, we aimed to understand the effect of cycle size on receptor binding. To that end, we synthesised two macrocyclic isomeric α-MSH analogues, c[NH-NO₂-C₆H₃-CO-His-DPhe-Arg-Trp-Lys]-Lys-NH₂ (CycN-K6) and c[NH-NO₂-C₆H₃-CO-His-DPhe-Arg-Trp-Lys-Lys]-NH₂ (CycN-K7)...
July 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28713981/neuroendocrine-factors-the-missing-link-in-non%C3%A2-melanoma-skin-cancer-review
#16
Mihai Lupu, Ana Caruntu, Constantin Caruntu, Laura Maria Lucia Papagheorghe, Mihaela Adriana Ilie, Vlad Voiculescu, Daniel Boda, Constantin Carolina, Cristiana Tanase, Maria Sifaki, Nikolaos Drakoulis, Charalampos Mamoulakis, George Tzanakakis, Monica Neagu, Demetrios A Spandidos, Boris N Izotov, Aristides M Tsatsakis
Non‑melanoma skin cancer (NMSC) is the most common form of cancer worldwide, comprising 95% of all cutaneous malignancies and approximately 40% of all cancers. In spite of intensive efforts aimed towards awareness campaigns and sun‑protective measures, epidemiological data indicate an increase in the incidence of NMSC. This category of skin cancers has many common environmental triggers. Arising primarily on sun‑exposed skin, it has been shown that ultraviolet radiation is, in the majority of cases, the main trigger involved in the pathogenesis of NMSC...
July 13, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28713957/soyasaponin%C3%A2-ag-inhibits-%C3%AE-%C3%A2-msh%C3%A2-induced-melanogenesis-in-b16f10-melanoma-cells-via-the-downregulation-of-trp%C3%A2-2
#17
Seung Hwan Yang, Aristides M Tsatsakis, George Tzanakakis, Hong-Suk Kim, Bao Le, Maria Sifaki, Demetrios A Spandidos, Chigen Tsukamoto, Kirill S Golokhvast, Boris N Izotov, Gyuhwa Chung
Saponins, which are glycosylated, represent a diverse group of biologically functional products in plants. In the present study, we investigated the effects of soyasaponin Ag, a secondary metabolite extracted from soybean, on α‑melanocyte-stimulating hormone (α‑MSH)‑induced melanin synthesis in B16F10 mouse melanoma cells and the underlying molecular mechanisms. To elucidate the mechanisms through which soyasaponin Ag inhibits melanin synthesis, we performed cellular tyrosinase activity assays and analyzed the expression of the melanogenesis‑related genes, tyrosinase, tyrosinase‑related protein (TRP)‑1 and TRP‑2...
September 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28695326/anti-melanogenic-effect-of-gomisin-n-from-schisandra-chinensis-turcz-baillon-schisandraceae-in-melanoma-cells
#18
JungNo Lee, Hwa Sun Ryu, Jae-Moon Kim, Tae-Hwa Jung, Sung-Min Park, Yong-Moon Lee
Overproduction and accumulation of melanin in the skin can lead to pigmentation disorders, such as freckles and melasma. Many researchers are studying the regulation of melanogenesis in the skin with the aim of developing whitening cosmetics. In this study, bioactivity-guided separation of the hexane fraction of Schisandra chinensis (Turcz.) Baillon extract yielded five major compounds, β-chamigrenal, α-ylangenol, gomisin N, gomisin A, and schisandrin. The structures were identified by using (1)H-NMR and (13)C-NMR spectroscopy and comparing the spectral data with published data...
July 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28689798/ethyl-acetate-extract-from-panax-ginseng-c-a-meyer-and-its-main-constituents-inhibit-%C3%AE-melanocyte-stimulating-hormone-induced-melanogenesis-by-suppressing-oxidative-stress-in-b16-mouse-melanoma-cells
#19
Rui Jiang, Xiao-Hao Xu, Ke Wang, Xin-Zhao Yang, Ying-Fei Bi, Yao Yan, Jian-Zeng Liu, Xue-Nan Chen, Zhen-Zhong Wang, Xiao-Li Guo, Da-Qing Zhao, Li-Wei Sun
ETHNOPHARMACOLOGICAL RELEVANCE: Hyperpigmentation disease involves darkening of the skin color due to melanin overproduction. Panax ginseng C.A. Meyer is a well-known traditional Chinese medicine and has a long history of use as a skin lightener to inhibit melanin formation in China, Korea and some other Asian countries. However, the constituents and the molecular mechanisms by which they affect melanogenesis are not fully clear. AIM OF THE STUDY: The purpose of this study was to identify the active ingredient in Panax ginseng C...
July 8, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28673563/the-role-of-oligomenorrhea-in-melasma
#20
Marjan Mahjour, Arash Khoushabi, Zohre Feyzabadi
Melasma is a facial hyperpigmentation in the upper lips, cheeks, forehead and chin. It is mostly seen in women. Melasma treatments include topical methods that are not only costly, but also temporary. Melasma recurs shortly after cessation of the treatment. Considering the relationship between melasma and elevated estrogen levels in patients with oligomenorrhea, systemic anti-estrogen therapies are not used for melasma. In this study, by searching in the scientific databases such as Scopus, Pubmed and the authentic books of traditional medicine such as the Canon of medicine, melasma treatment was evaluated based on oligomenorrhea systemic therapy...
July 2017: Medical Hypotheses
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