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https://www.readbyqxmd.com/read/29334686/fat-mass-and-obesity-related-gene-variants-rs9939609-and-rs7185735-are-associated-with-second-generation-antipsychotic-induced-weight-gain
#1
Charlotte Schröder, Fabian Czerwensky, Stefan Leucht, Werner Steimer
INTRODUCTION: Weight gain is a limiting and frequent adverse effect of second-generation antipsychotic therapy. Identifying genetic risk factors would significantly improve pharmacotherapy. METHODS: We focused on rs7185735 and rs9939609, 2 common single nucleotide polymorphisms of the fat mass and obesity-associated (FTO) gene reported to be associated with obesity. Three-hundred fifty Caucasian inpatients were included in a naturalistic study. RESULTS: After 4 weeks of treatment, we did not observe any significant association of polymorphisms with weight change in the whole study population (p>0...
January 15, 2018: Pharmacopsychiatry
https://www.readbyqxmd.com/read/29329999/understanding-melanocortin-4-receptor-control-of-neuronal-circuits-toward-novel-therapeutics-for-obesity-syndrome
#2
REVIEW
Sang Hyeon Ju, Gyu-Bon Cho, Jong-Woo Sohn
It is well known that melanocortin-4 receptors (MC4Rs) and central melanocortin pathways regulate food intake, energy expenditure, and glucose homeostasis. Importantly, MC4R deficiency is the most common monogenic cause of human obesity. Interestingly, MC4Rs expressed by distinct central nuclei are responsible for the different physiological function of MC4R stimulation. In addition, MC4Rs activate multiple intracellular and/or synaptic signaling molecules for the regulation of neuronal circuits. Therefore, MC4Rs and the downstream signal molecules are plausible targets for development of novel therapeutics against obesity and obesity-related metabolic disorders...
January 9, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29325775/nutrigenetic-variants-and-cardio-metabolic-risk-in-women-with-or-without-gestational-diabetes
#3
Marica Franzago, Federica Fraticelli, Daniela Marchetti, Claudio Celentano, Marco Liberati, Liborio Stuppia, Ester Vitacolonna
AIM: Gestational diabetes mellitus (GDM) is the most frequent metabolic disorder in pregnancy and it can be considered a silent risk associated to T2DM and CVD later in life. The aim of this study was to investigate the association of clinical parameters with nine single nucleotide polymorphisms (SNPs) involved with nutrients and metabolism in women with or without GDM in order to identify potential routine clinical markers for early prevention. METHODS: Nine gene variants associated with nutrients and metabolism, namely PPARG2 rs1801282 (C>G); PPARGC1A rs8192678 (C>T); TCF7L2 rs7903146 (C>T); LDLR rs2228671 (C>T); MTHFR rs1801133 (C>T); APOA5 rs662799 (T>C); GCKR rs1260326 (C>T); FTO rs9939609 (T>A); MC4R rs17782313 (T>C) were genotyped in 104 GDM cases and 124 controls using High Resolution Melting (HRM) analysis...
January 8, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29315078/associations-between-the-components-of-metabolic-syndrome-and-the-polymorphisms-in-the-peroxisome-proliferator-activated-receptor-gamma-ppar-%C3%AE-the-fat-mass-and-obesity-associated-fto-and-the-melanocortin-4-receptor-mc4r-genes
#4
Małgorzata Szkup, Aleksander Jerzy Owczarek, Daria Schneider-Matyka, Jacek Brodowski, Beata Łój, Elżbieta Grochans
INTRODUCTION: Metabolic syndrome (MetS) is regarded as a set of abnormalities, increasing the risk of serious functioning disorders. It can develop as a result of genetic predisposition. AIM: The aim of this study was to establish associations between MetS-related abnormalities and the PPAR-γ rs1801282, FTO rs9939609, and MC4R rs17782313 polymorphisms. MATERIAL AND METHODS: The study involved 425 women aged 45-60 years. The participants were surveyed and subjected to anthropometric, biochemical and genetic analysis...
January 9, 2018: Aging
https://www.readbyqxmd.com/read/29311635/subcellular-localization-of-mc4r-with-adcy3-at-neuronal-primary-cilia-underlies-a-common-pathway-for-genetic-predisposition-to-obesity
#5
Jacqueline E Siljee, Yi Wang, Adelaide A Bernard, Baran A Ersoy, Sumei Zhang, Aaron Marley, Mark Von Zastrow, Jeremy F Reiter, Christian Vaisse
Most monogenic cases of obesity in humans have been linked to mutations in genes encoding members of the leptin-melanocortin pathway. Specifically, mutations in MC4R, the melanocortin-4 receptor gene, account for 3-5% of all severe obesity cases in humans 1-3 . Recently, ADCY3 (adenylyl cyclase 3) gene mutations have been implicated in obesity 4,5 . ADCY3 localizes to the primary cilia of neurons 6 , organelles that function as hubs for select signaling pathways. Mutations that disrupt the functions of primary cilia cause ciliopathies, rare recessive pleiotropic diseases in which obesity is a cardinal manifestation 7 ...
January 8, 2018: Nature Genetics
https://www.readbyqxmd.com/read/29296625/molecular-therapy-of-melanocortin-4-receptor-obesity-by-an-autoregulatory-bdnf-vector
#6
Jason J Siu, Nicholas J Queen, Xianglan Liu, Wei Huang, Travis McMurphy, Lei Cao
Mutations in the melanocortin-4-receptor (MC4R) comprise the most common monogenic form of severe early-onset obesity, and conventional treatments are either ineffective long-term or contraindicated. Immediately downstream of MC4R-in the pathway for regulating energy balance-is brain-derived neurotrophic factor (BDNF). Our previous studies show that adeno-associated virus (AAV)-mediated hypothalamic BDNF gene transfer alleviates obesity and diabetes in both diet-induced and genetic models. To facilitate clinical translation, we developed a built-in autoregulatory system to control therapeutic gene expression mimicking the body's natural feedback systems...
December 15, 2017: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/29290621/a-gut-brain-axis-regulating-glucose-metabolism-mediated-by-bile-acids-and-competitive-fibroblast-growth-factor-actions-at-the-hypothalamus
#7
Shunmei Liu, Genevieve Marcelin, Clemence Blouet, Jae Hoon Jeong, Young-Hwan Jo, Gary J Schwartz, Streamson Chua
OBJECTIVE: Bile acids have been implicated as important regulators of glucose metabolism via activation of FXR and GPBAR1. We have previously shown that FGF19 can modulate glucose handling by suppressing the activity of hypothalamic AGRP/NPY neurons. As bile acids stimulate the release of FGF19/FGF15 into the circulation, we pursued the potential of bile acids to improve glucose tolerance via a gut-brain axis involving FXR and FGF15/FGF19 within enterocytes and FGF receptors on hypothalamic AGRP/NPY neurons...
December 9, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29273807/protein-altering-variants-associated-with-body-mass-index-implicate-pathways-that-control-energy-intake-and-expenditure-in-obesity
#8
Valérie Turcot, Yingchang Lu, Heather M Highland, Claudia Schurmann, Anne E Justice, Rebecca S Fine, Jonathan P Bradfield, Tõnu Esko, Ayush Giri, Mariaelisa Graff, Xiuqing Guo, Audrey E Hendricks, Tugce Karaderi, Adelheid Lempradl, Adam E Locke, Anubha Mahajan, Eirini Marouli, Suthesh Sivapalaratnam, Kristin L Young, Tamuno Alfred, Mary F Feitosa, Nicholas G D Masca, Alisa K Manning, Carolina Medina-Gomez, Poorva Mudgal, Maggie C Y Ng, Alex P Reiner, Sailaja Vedantam, Sara M Willems, Thomas W Winkler, Gonçalo Abecasis, Katja K Aben, Dewan S Alam, Sameer E Alharthi, Matthew Allison, Philippe Amouyel, Folkert W Asselbergs, Paul L Auer, Beverley Balkau, Lia E Bang, Inês Barroso, Lisa Bastarache, Marianne Benn, Sven Bergmann, Lawrence F Bielak, Matthias Blüher, Michael Boehnke, Heiner Boeing, Eric Boerwinkle, Carsten A Böger, Jette Bork-Jensen, Michiel L Bots, Erwin P Bottinger, Donald W Bowden, Ivan Brandslund, Gerome Breen, Murray H Brilliant, Linda Broer, Marco Brumat, Amber A Burt, Adam S Butterworth, Peter T Campbell, Stefania Cappellani, David J Carey, Eulalia Catamo, Mark J Caulfield, John C Chambers, Daniel I Chasman, Yii-Der I Chen, Rajiv Chowdhury, Cramer Christensen, Audrey Y Chu, Massimiliano Cocca, Francis S Collins, James P Cook, Janie Corley, Jordi Corominas Galbany, Amanda J Cox, David S Crosslin, Gabriel Cuellar-Partida, Angela D'Eustacchio, John Danesh, Gail Davies, Paul I W Bakker, Mark C H Groot, Renée Mutsert, Ian J Deary, George Dedoussis, Ellen W Demerath, Martin Heijer, Anneke I Hollander, Hester M Ruijter, Joe G Dennis, Josh C Denny, Emanuele Angelantonio, Fotios Drenos, Mengmeng Du, Marie-Pierre Dubé, Alison M Dunning, Douglas F Easton, Todd L Edwards, David Ellinghaus, Patrick T Ellinor, Paul Elliott, Evangelos Evangelou, Aliki-Eleni Farmaki, I Sadaf Farooqi, Jessica D Faul, Sascha Fauser, Shuang Feng, Ele Ferrannini, Jean Ferrieres, Jose C Florez, Ian Ford, Myriam Fornage, Oscar H Franco, Andre Franke, Paul W Franks, Nele Friedrich, Ruth Frikke-Schmidt, Tessel E Galesloot, Wei Gan, Ilaria Gandin, Paolo Gasparini, Jane Gibson, Vilmantas Giedraitis, Anette P Gjesing, Penny Gordon-Larsen, Mathias Gorski, Hans-Jörgen Grabe, Struan F A Grant, Niels Grarup, Helen L Griffiths, Megan L Grove, Vilmundur Gudnason, Stefan Gustafsson, Jeff Haessler, Hakon Hakonarson, Anke R Hammerschlag, Torben Hansen, Kathleen Mullan Harris, Tamara B Harris, Andrew T Hattersley, Christian T Have, Caroline Hayward, Liang He, Nancy L Heard-Costa, Andrew C Heath, Iris M Heid, Øyvind Helgeland, Jussi Hernesniemi, Alex W Hewitt, Oddgeir L Holmen, G Kees Hovingh, Joanna M M Howson, Yao Hu, Paul L Huang, Jennifer E Huffman, M Arfan Ikram, Erik Ingelsson, Anne U Jackson, Jan-Håkan Jansson, Gail P Jarvik, Gorm B Jensen, Yucheng Jia, Stefan Johansson, Marit E Jørgensen, Torben Jørgensen, J Wouter Jukema, Bratati Kahali, René S Kahn, Mika Kähönen, Pia R Kamstrup, Stavroula Kanoni, Jaakko Kaprio, Maria Karaleftheri, Sharon L R Kardia, Fredrik Karpe, Sekar Kathiresan, Frank Kee, Lambertus A Kiemeney, Eric Kim, Hidetoshi Kitajima, Pirjo Komulainen, Jaspal S Kooner, Charles Kooperberg, Tellervo Korhonen, Peter Kovacs, Helena Kuivaniemi, Zoltán Kutalik, Kari Kuulasmaa, Johanna Kuusisto, Markku Laakso, Timo A Lakka, David Lamparter, Ethan M Lange, Leslie A Lange, Claudia Langenberg, Eric B Larson, Nanette R Lee, Terho Lehtimäki, Cora E Lewis, Huaixing Li, Jin Li, Ruifang Li-Gao, Honghuang Lin, Keng-Hung Lin, Li-An Lin, Xu Lin, Lars Lind, Jaana Lindström, Allan Linneberg, Ching-Ti Liu, Dajiang J Liu, Yongmei Liu, Ken S Lo, Artitaya Lophatananon, Andrew J Lotery, Anu Loukola, Jian'an Luan, Steven A Lubitz, Leo-Pekka Lyytikäinen, Satu Männistö, Gaëlle Marenne, Angela L Mazul, Mark I McCarthy, Roberta McKean-Cowdin, Sarah E Medland, Karina Meidtner, Lili Milani, Vanisha Mistry, Paul Mitchell, Karen L Mohlke, Leena Moilanen, Marie Moitry, Grant W Montgomery, Dennis O Mook-Kanamori, Carmel Moore, Trevor A Mori, Andrew D Morris, Andrew P Morris, Martina Müller-Nurasyid, Patricia B Munroe, Mike A Nalls, Narisu Narisu, Christopher P Nelson, Matt Neville, Sune F Nielsen, Kjell Nikus, Pål R Njølstad, Børge G Nordestgaard, Dale R Nyholt, Jeffrey R O'Connel, Michelle L O'Donoghue, Loes M Olde Loohuis, Roel A Ophoff, Katharine R Owen, Chris J Packard, Sandosh Padmanabhan, Colin N A Palmer, Nicholette D Palmer, Gerard Pasterkamp, Aniruddh P Patel, Alison Pattie, Oluf Pedersen, Peggy L Peissig, Gina M Peloso, Craig E Pennell, Markus Perola, James A Perry, John R B Perry, Tune H Pers, Thomas N Person, Annette Peters, Eva R B Petersen, Patricia A Peyser, Ailith Pirie, Ozren Polasek, Tinca J Polderman, Hannu Puolijoki, Olli T Raitakari, Asif Rasheed, Rainer Rauramaa, Dermot F Reilly, Frida Renström, Myriam Rheinberger, Paul M Ridker, John D Rioux, Manuel A Rivas, David J Roberts, Neil R Robertson, Antonietta Robino, Olov Rolandsson, Igor Rudan, Katherine S Ruth, Danish Saleheen, Veikko Salomaa, Nilesh J Samani, Yadav Sapkota, Naveed Sattar, Robert E Schoen, Pamela J Schreiner, Matthias B Schulze, Robert A Scott, Marcelo P Segura-Lepe, Svati H Shah, Wayne H-H Sheu, Xueling Sim, Andrew J Slater, Kerrin S Small, Albert V Smith, Lorraine Southam, Timothy D Spector, Elizabeth K Speliotes, John M Starr, Kari Stefansson, Valgerdur Steinthorsdottir, Kathleen E Stirrups, Konstantin Strauch, Heather M Stringham, Michael Stumvoll, Liang Sun, Praveen Surendran, Amy J Swift, Hayato Tada, Katherine E Tansey, Jean-Claude Tardif, Kent D Taylor, Alexander Teumer, Deborah J Thompson, Gudmar Thorleifsson, Unnur Thorsteinsdottir, Betina H Thuesen, Anke Tönjes, Gerard Tromp, Stella Trompet, Emmanouil Tsafantakis, Jaakko Tuomilehto, Anne Tybjaerg-Hansen, Jonathan P Tyrer, Rudolf Uher, André G Uitterlinden, Matti Uusitupa, Sander W Laan, Cornelia M Duijn, Nienke Leeuwen, Jessica van Setten, Mauno Vanhala, Anette Varbo, Tibor V Varga, Rohit Varma, Digna R Velez Edwards, Sita H Vermeulen, Giovanni Veronesi, Henrik Vestergaard, Veronique Vitart, Thomas F Vogt, Uwe Völker, Dragana Vuckovic, Lynne E Wagenknecht, Mark Walker, Lars Wallentin, Feijie Wang, Carol A Wang, Shuai Wang, Yiqin Wang, Erin B Ware, Nicholas J Wareham, Helen R Warren, Dawn M Waterworth, Jennifer Wessel, Harvey D White, Cristen J Willer, James G Wilson, Daniel R Witte, Andrew R Wood, Ying Wu, Hanieh Yaghootkar, Jie Yao, Pang Yao, Laura M Yerges-Armstrong, Robin Young, Eleftheria Zeggini, Xiaowei Zhan, Weihua Zhang, Jing Hua Zhao, Wei Zhao, Wei Zhou, Krina T Zondervan, Jerome I Rotter, John A Pospisilik, Fernando Rivadeneira, Ingrid B Borecki, Panos Deloukas, Timothy M Frayling, Guillaume Lettre, Kari E North, Cecilia M Lindgren, Joel N Hirschhorn, Ruth J F Loos
Genome-wide association studies (GWAS) have identified >250 loci for body mass index (BMI), implicating pathways related to neuronal biology. Most GWAS loci represent clusters of common, noncoding variants from which pinpointing causal genes remains challenging. Here we combined data from 718,734 individuals to discover rare and low-frequency (minor allele frequency (MAF) < 5%) coding variants associated with BMI. We identified 14 coding variants in 13 genes, of which 8 variants were in genes (ZBTB7B, ACHE, RAPGEF3, RAB21, ZFHX3, ENTPD6, ZFR2 and ZNF169) newly implicated in human obesity, 2 variants were in genes (MC4R and KSR2) previously observed to be mutated in extreme obesity and 2 variants were in GIPR...
January 2018: Nature Genetics
https://www.readbyqxmd.com/read/29226825/desacetyl-%C3%AE-melanocyte-stimulating-hormone-and-%C3%AE-melanocyte-stimulating-hormone-are-required-to-regulate-energy-balance
#9
Kathleen G Mountjoy, Alexandre Caron, Kristina Hubbard, Avik Shome, Angus C Grey, Bo Sun, Sarah Bould, Martin Middleditch, Beau Pontré, Ailsa McGregor, Paul W R Harris, Renata Kowalczyk, Margaret A Brimble, Rikus Botha, Karen M L Tan, Sarah J Piper, Christina Buchanan, Syann Lee, Anthony P Coll, Joel K Elmquist
OBJECTIVE: Regulation of energy balance depends on pro-opiomelanocortin (POMC)-derived peptides and melanocortin-4 receptor (MC4R). Alpha-melanocyte stimulating hormone (α-MSH) is the predicted natural POMC-derived peptide that regulates energy balance. Desacetyl-α-MSH, the precursor for α-MSH, is present in brain and blood. Desacetyl-α-MSH is considered to be unimportant for regulating energy balance despite being more potent (compared with α-MSH) at activating the appetite-regulating MC4R in vitro...
November 24, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29220676/penetrance-of-polygenic-obesity-susceptibility-loci-across-the-body-mass-index-distribution
#10
Arkan Abadi, Akram Alyass, Sebastien Robiou du Pont, Ben Bolker, Pardeep Singh, Viswanathan Mohan, Rafael Diaz, James C Engert, Salim Yusuf, Hertzel C Gerstein, Sonia S Anand, David Meyre
A growing number of single-nucleotide polymorphisms (SNPs) have been associated with body mass index (BMI) and obesity, but whether the effects of these obesity-susceptibility loci are uniform across the BMI distribution remains unclear. We studied the effects of 37 BMI-associated SNPs in 75,230 adults of European ancestry across BMI percentiles by using conditional quantile regression (CQR) and meta-regression (MR) models. The effects of nine SNPs (24%)-rs1421085 (FTO; p = 8.69 × 10-15), rs6235 (PCSK1; p = 7...
December 7, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29216354/high-prevalence-of-rare-monogenic-forms-of-obesity-in-obese-guadeloupean-afro-caribbean-children
#11
Lydia Foucan, Laurent Larifla, Emmanuelle Durand, Christine Rambhojan, Christophe Armand, Carl-Thony Michel, Rachel Billy, Véronique Dhennin, Franck De Graeve, Iandry Rabearivelo, Olivier Sand, Jean-Marc Lacorte, Philippe Froguel, Amélie Bonnefond
Context: The population from Guadeloupe Island exhibits high prevalence of obesity. Objective: We aimed to investigate whether rare genetic mutations in genes involved in monogenic obesity (or diabetes) might be causal in this population of Afro-Caribbean ancestry. Design and setting: This was a secondary analysis of a study on obesity conducted in schoolchildren from Guadeloupe in 2013, which aimed to assess the changes in children profiles after a lifestyle intervention program...
December 5, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29212175/the-role-of-established-east-asian-obesity-related-loci-on-pediatric-leptin-levels-highlights-a-neuronal-influence-on-body-weight-regulation-in-chinese-children-and-adolescents-the-bcams-study
#12
Junling Fu, Ge Li, Lujiao Li, Jinhua Yin, Hong Cheng, Lanwen Han, Qian Zhang, Naishi Li, Xinhua Xiao, Struan F A Grant, Mingyao Li, Shan Gao, Jie Mi, Ming Li
Genome-wide association studies have identified multiple variants associated with adult obesity, mostly in European-ancestry populations. We aimed to systematically assess the contribution of key loci, which had been previously shown to be associated in East Asian adults, to childhood obesity, related adipokine profiles and metabolic traits in a Chinese pediatric population. Twelve single-nucleotide polymorphisms (SNPs) plus metabolic profiles and levels of five adipokines (leptin, adiponectin, resistin, fibroblast growth factor 21 and retinol binding protein 4) were evaluated in 3,506 Chinese children and adolescents aged 6-18...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29202448/cd11c-resident-macrophages-drive-hepatocyte-death-triggered-liver-fibrosis-in-a-murine-model-of-nonalcoholic-steatohepatitis
#13
Michiko Itoh, Takayoshi Suganami, Hideaki Kato, Sayaka Kanai, Ibuki Shirakawa, Takeru Sakai, Toshihiro Goto, Masahiro Asakawa, Isao Hidaka, Hiroshi Sakugawa, Koji Ohnishi, Yoshihiro Komohara, Kenichi Asano, Isao Sakaida, Masato Tanaka, Yoshihiro Ogawa
Although recent evidence has pointed to the role of organ- and pathogenesis-specific macrophage subsets, it is still unclear which subsets are critically involved in the pathogenesis of nonalcoholic steatohepatitis (NASH). Using melanocortin-4 receptor-deficient (MC4R-KO) mice fed Western diet (WD), which exhibit liver phenotypes similar to those of human NASH, we found a histological structure, termed hepatic crown-like structure (hCLS), in which CD11c+ macrophages surround dead/dying hepatocytes, a prominent feature of NASH...
November 16, 2017: JCI Insight
https://www.readbyqxmd.com/read/29182660/interaction-between-tcf7l2-polymorphism-and-dietary-fat-intake-on-high-density-lipoprotein-cholesterol
#14
Dhanasekaran Bodhini, Szilvia Gaal, Israa Shatwan, Kandaswamy Ramya, Basma Ellahi, Shelini Surendran, Vasudevan Sudha, Mohan R Anjana, Viswanathan Mohan, Julie A Lovegrove, Venkatesan Radha, Karani Santhanakrishnan Vimaleswaran
Recent evidence suggests that lifestyle factors influence the association between the Melanocortin 4 receptor (MC4R) and Transcription Factor 7-Like 2 (TCF7L2) gene variants and cardio-metabolic traits in several populations; however, the available research is limited among the Asian Indian population. Hence, the present study examined whether the association between the MC4R single nucleotide polymorphism (SNP) (rs17782313) and two SNPs of the TCF7L2 gene (rs12255372 and rs7903146) and cardio-metabolic traits is modified by dietary factors and physical activity...
2017: PloS One
https://www.readbyqxmd.com/read/29154220/association-of-melanocortin-mc4r-and-myostatin-mstn-genes-with-carcass-quality-in-rabbit
#15
Karim El-Sabrout, Sarah Aggag
The aim of this study was to investigate the association of Melanocortin (MC4R) and Myostatin (MSTN) with the carcass quality of V-line and Alexandria line rabbits. MC4R and MSTN were screened by single-strand conformational polymorphism analysis (SSCP) then DNA was sequenced. The results identified four novel SNPs using the four studied primers of the MC4R and MSTN genes. The genotype (BB) has significant higher body weight (BW), carcass weight (CW) and dressing percentage (DP) than AA rabbits. There were no significant differences within the two lines in the carcass color (light pink) and carcass fat (CF)...
November 7, 2017: Meat Science
https://www.readbyqxmd.com/read/29113896/neuroinflammation-produced-by-heavy-alcohol-intake-is-due-to-loops-of-interactions-between-toll-like-4-and-tnf-receptors-peroxisome-proliferator-activated-receptors-and-the-central-melanocortin-system-a-novel-hypothesis-and-new-therapeutic-avenues
#16
Osvaldo Flores-Bastías, Eduardo Karahanian
Excessive alcohol intake induces an inflammatory response in the brain, via TNFα, TLR4 and NF-κB signaling pathways. It has been proposed that neuroinflammation would play a very important role in the development of alcohol addiction. In addition to stimulating the synthesis of inflammatory mediators such as IL-6, IL-1β and TNFα, NF-κB is capable of reducing the anti-inflammatory activity of PPARα and PPARγ. Reciprocally, PPARα, PPARγ and melanocortin 4 receptor (MC4R) can decrease the proinflammatory activity of NF-κB, establishing an interplay of inactivations between such nuclear factors and receptors...
November 4, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29099963/activity-of-the-hypothalamic-melanocortin-system-decreases-in-middle-aged-and-increases-in-old-rats
#17
Nóra Füredi, Alexandra Mikó, Balázs Gaszner, Diána Feller, Ildikó Rostás, Judit Tenk, Margit Solymár, Márta Balaskó, Erika Pétervári
Appearance of middle-aged obesity and aging anorexia both in humans and rodents suggests a role for regulatory alterations. Hypothalamic melanocortin agonist, alpha-melanocyte-stimulating hormone (alpha-MSH) produced in the arcuate nucleus (ARC) reduces body weight via inducing hypermetabolism and anorexia mainly through melanocortin 4 receptors (MC4R) in the paraventricular nucleus (PVN). Orexigenic ARC-derived agouti-related protein (AgRP) is an inverse agonist on MC4R in the PVN. Previously we demonstrated that characteristic age-related shifts in the catabolic effects of alpha-MSH may contribute both to middle-aged obesity and aging anorexia...
November 1, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29097517/neuropeptides-in-obesity-and-metabolic-disease
#18
REVIEW
Agatha A van der Klaauw
BACKGROUND: The global rise in the prevalence of obesity and associated comorbidities such as type 2 diabetes, cardiovascular disease, and cancer represents a major public health concern. CONTENT: Studies in rodents with the use of global and targeted gene disruption, and mapping of neurocircuitry by using optogenetics and designer receptors exclusively activated by designer drugs (DREADDs) have greatly advanced our understanding of the neural control of body weight...
November 2, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29069752/the-caudal-pedunculopontine-tegmental-nucleus-may-be-involved-in-the-regulation-of-skeletal-muscle-activity-by-melanocortin-sympathetic-pathway-a-virally-mediated-trans-synaptic-tracing-study-in-spinally-transected-transgenic-mice
#19
Zhi-Gang He, Bao-Wen Liu, Zhi-Xiao Li, Xue-Bi Tian, San-Guang Liu, Anne Manyande, Ding-Yu Zhang, Hong-Bing Xiang
Understanding neuroanatomical sympathetic circuitry and neuronal connections from the caudal pedunculopontine tegmental nucleus to skeletal muscle is important to the study of possible mechanisms of pedunculopontine tegmental nucleus (PPTg) and cuneiform nucleus (CnF) that are involved in the regulation of skeletal muscle activity of the sympathetic pathway. The aim of this study was to use virus PRV-614 to trace the melanocortin-sympathetic neural pathways from PPTg and CnF to a hindlimb muscle (gastrocnemius) in spinally transected MC4R-GFP transgenic mice...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29059347/sim1-neurons-are-sufficient-for-mc4r-mediated-sexual-function-in-male-mice
#20
Erin Semple, Jennifer W Hill
Sexual dysfunction is a poorly understood condition that affects up to one-third of men around the world. Existing treatments that target the periphery do not work for all men. Previous studies have shown that central melanocortins, which are released by pro-opiomelanocortin (POMC) neurons in the arcuate nucleus of the hypothalamus, can lead to male erection and increased libido. Several studies specifically implicate the melanocortin 4 receptor (MC4R) in the central control of sexual function, but the specific neural circuitry involved is unknown...
October 19, 2017: Endocrinology
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