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https://www.readbyqxmd.com/read/29332196/bioelectronic-modulation-of-carotid-sinus-nerve-activity-in-the-rat-a-potential-therapeutic-approach-for-type-2-diabetes
#1
Joana F Sacramento, Daniel J Chew, Bernardete F Melo, Matteo Donegá, Wesley Dopson, Maria P Guarino, Alison Robinson, Jesus Prieto-Lloret, Sonal Patel, Bradley J Holinski, Nishan Ramnarain, Victor Pikov, Kristoffer Famm, Silvia V Conde
AIMS/HYPOTHESIS: A new class of treatments termed bioelectronic medicines are now emerging that aim to target individual nerve fibres or specific brain circuits in pathological conditions to repair lost function and reinstate a healthy balance. Carotid sinus nerve (CSN) denervation has been shown to improve glucose homeostasis in insulin-resistant and glucose-intolerant rats; however, these positive effects from surgery appear to diminish over time and are heavily caveated by the severe adverse effects associated with permanent loss of chemosensory function...
January 14, 2018: Diabetologia
https://www.readbyqxmd.com/read/29330559/a-post-translational-balancing-act-the-good-and-the-bad-of-sumoylation-in-pancreatic-islets
#2
EDITORIAL
Patrick E MacDonald
Post-translational modification of proteins contributes to the control of cell function and survival. The balance of these in insulin-producing pancreatic beta cells is important for the maintenance of glucose homeostasis. Protection from the damaging effects of reactive oxygen species is required for beta cell survival, but if this happens at the expense of insulin secretory function then the ability of islets to respond to changing metabolic conditions may be compromised. In this issue of Diabetologia, He et al ( https://doi...
January 12, 2018: Diabetologia
https://www.readbyqxmd.com/read/29322219/sirt6-mediated-transcriptional-suppression-of-txnip-is-critical-for-pancreatic-beta-cell-function-and-survival-in-mice
#3
Kunhua Qin, Ning Zhang, Zhao Zhang, Michael Nipper, Zhenxin Zhu, Jake Leighton, Kexin Xu, Nicolas Musi, Pei Wang
AIMS/HYPOTHESIS: Better understanding of how genetic and epigenetic components control beta cell differentiation and function is key to the discovery of novel therapeutic approaches to prevent beta cell dysfunction and failure in the progression of type 2 diabetes. Our goal was to elucidate the role of histone deacetylase sirtuin 6 (SIRT6) in beta cell development and homeostasis. METHODS: Sirt6 endocrine progenitor cell conditional knockout and beta cell-specific knockout mice were generated using the Cre-loxP system...
January 10, 2018: Diabetologia
https://www.readbyqxmd.com/read/29321172/modest-decreases-in-endogenous-all-trans-retinoic-acid-produced-by-a-mouse-rdh10-heterozygote-provoke-major-abnormalities-in-adipogenesis-and-lipid-metabolism
#4
Di Yang, Marta G Vuckovic, Carolyn P Smullin, Myeongcheol Kim, Christabel Pui-See Lo, Emily Devericks, Hong Sik Yoo, Milena Tintcheva, Yinghua Deng, Joseph L Napoli
Pharmacological dosing of all-trans-retinoic acid (atRA) controls adiposity in rodents by inhibiting adipogenesis and inducing fatty acid oxidation. Retinol dehydrogenases (Rdh) catalyze the first reaction that activate retinol into atRA. This study examined post-natal contributions of Rdh10 to atRA biosynthesis and physiological functions of endogenous atRA. Embryonic fibroblasts from Rdh10 heterozygote hypomorphs or with a total Rdh10 knockout exhibit decreased atRA biosynthesis and escalated adipogenesis...
January 10, 2018: Diabetes
https://www.readbyqxmd.com/read/29317623/glp-1-release-and-vagal-afferent-activation-mediate-the-beneficial-metabolic-and-chronotherapeutic-effects-of-d-allulose
#5
Yusaku Iwasaki, Mio Sendo, Katsuya Dezaki, Tohru Hira, Takehiro Sato, Masanori Nakata, Chayon Goswami, Ryohei Aoki, Takeshi Arai, Parmila Kumari, Masaki Hayakawa, Chiaki Masuda, Takashi Okada, Hiroshi Hara, Daniel J Drucker, Yuichiro Yamada, Masaaki Tokuda, Toshihiko Yada
Overeating and arrhythmic feeding promote obesity and diabetes. Glucagon-like peptide-1 receptor (GLP-1R) agonists are effective anti-obesity drugs but their use is limited by side effects. Here we show that oral administration of the non-calorie sweetener, rare sugar D-allulose (D-psicose), induces GLP-1 release, activates vagal afferent signaling, reduces food intake and promotes glucose tolerance in healthy and obese-diabetic animal models. Subchronic D-allulose administered at the light period (LP) onset ameliorates LP-specific hyperphagia, visceral obesity, and glucose intolerance...
January 9, 2018: Nature Communications
https://www.readbyqxmd.com/read/29317436/the-diabetes-gene-and-wnt-pathway-effector-tcf7l2-regulates-adipocyte-development-and-function
#6
Xi Chen, Ayala Iriscilla, Chris Shannon, Marcel Fourcaudot, Nikhil K Acharya, Christopher P Jenkinson, Sami Heikkinen, Luke Norton
The gene encoding for transcription factor 7-like 2 (TCF7L2) is the strongest type 2 diabetes (T2DM) candidate gene discovered to date. The TCF7L2 protein is a key transcriptional effector of the Wnt/β-catenin signaling pathway, which is an important developmental pathway that negatively regulates adipogenesis. However, the precise role that TCF7L2 plays in the development and function of adipocytes remains largely unknown. Using a combination of in vitro approaches, we first show that TCF7L2 protein is increased during adipogenesis in 3T3-L1 cells and primary adipocyte stem cells (ASC), and that TCF7L2 expression is required for the regulation of Wnt signaling during adipogenesis...
January 9, 2018: Diabetes
https://www.readbyqxmd.com/read/29313726/development-and-characterization-of-a-novel-congenic-rat-strain-for-obesity-and-cancer-research
#7
Ann Marie O'Neill, Erin A Gillaspie, Christine M Burrington, Darin T Lynch, Robert T Dauchy, David E Blask, Paul C Tirrell, Brian A Reis, Melissa J Horsman, Michael W Greene
The association between a Western Diet and colon cancer suggests that dietary factors and/or obesity may contribute to cancer progression. Our objective was to develop a new animal model of obesity and the associated pathophysiology to investigate human cancer independent of dietary components that induce obesity. A novel congenic rat strain was established by introducing the fa allele from the Zucker rat into the Rowett Nude rat to generate a "fatty nude rat". The obese phenotype was first characterized in the new model...
January 9, 2018: Nutrition and Cancer
https://www.readbyqxmd.com/read/29309761/activation-of-nuclear-receptor-pxr-impairs-glucose-tolerance-and-dysregulates-glut2-expression-and-subcellular-localization-in-liver
#8
Fatemeh Hassani-Nezhad-Gashti, Jaana Rysä, Outi Kummu, Juha Näpänkangas, Marcin Buler, Mikko Karpale, Janne Hukkanen, Jukka Hakkola
Pregnane X receptor (PXR) is a nuclear receptor that senses chemical environment and is activated by numerous clinically used drugs and environmental contaminants. Previous studies have indicated that several drugs known to activate PXR appear to induce glucose intolerance. We now aimed to reveal the role of PXR in drug-induced glucose intolerance and characterize the mechanisms involved. We used PXR knockout mice model to investigate the significance of this nuclear receptor in the regulation of glucose tolerance...
January 5, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29309558/intergenerational-influence-of-paternal-obesity-on-metabolic-and-reproductive-health-parameters-of-the-offspring-male-preferential-impact-and-involvement-of-kiss1-mediated-pathways
#9
Miguel Angel Sanchez-Garrido, Francisco Ruiz-Pino, Inmaculada Velasco, Alexia Barroso, Daniela Fernandois, Violeta Heras, Maria Manfredi-Lozano, Maria Jesus Vazquez, Juan Manuel Castellano, Juan Roa, Leonor Pinilla, Manuel Tena-Sempere
Obesity and its comorbidities are reaching epidemic proportions worldwide. Maternal obesity is known to predispose the offspring to metabolic disorders, independently of genetic inheritance. This intergenerational transmission has also been suggested for paternal obesity, with a potential negative impact on the metabolic and, eventually, reproductive health of the offspring, likely via epigenetic changes in spermatozoa. However, the neuroendocrine component of such phenomenon and whether paternal obesity sensitizes the offspring to the disturbances induced by high fat diet (HFD) remain poorly defined...
December 22, 2017: Endocrinology
https://www.readbyqxmd.com/read/29307460/diabetes-mellitus-and-right-ventricular-dysfunction-in-heart-failure-with-preserved-ejection-fraction
#10
Thomas M Gorter, Koen W Streng, Joost P van Melle, Michiel Rienstra, Michael G Dickinson, Carolyn S P Lam, Yoran M Hummel, Adriaan A Voors, Elke S Hoendermis, Dirk J van Veldhuisen
Diabetes mellitus is associated with left-sided myocardial remodeling in heart failure with preserved ejection fraction (HFpEF). Little is known about the impact of diabetes mellitus on right ventricular (RV) function in HFpEF. We therefore studied the relation between diabetes mellitus and RV dysfunction in HFpEF. We have examined patients with HFpEF who underwent simultaneous right-sided cardiac catheterization and echocardiography. RV systolic function was assessed using multiple established echocardiographic parameters, and systolic dysfunction was present if ≥2 parameters were outside the normal range...
December 11, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29300979/high-intensity-exercise-decreases-ip6k1-muscle-content-improves-insulin-sensitivity-si2-in-glucose-intolerant-individuals
#11
Jane Naufahu, Bradley Elliott, Anatoliy Markiv, Petra Dunning-Foreman, Maggie McGrady, David Howard, Peter Watt, Richard W A Mackenzie
Context: Insulin resistance in skeletal muscle contributes to whole body hyperglycaemia and the secondary complications associated with type 2 diabetes. Inositol hexakisphosphate kinase-1 (IP6K1) may inhibit insulin-stimulated glucose transport in this tissue type. Objective: Muscle and plasma IP6K1 were correlated with two-compartment models of glucose control in insulin-resistant hyperinsulimic individuals. Muscle IP6K1 was also compared following two different exercise trials...
December 29, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29298444/human-malformation-syndromes-of-defective-gli-opposite-phenotypes-of-2q14-2-gli2-and-7p14-2-gli3-microdeletions-and-a-glia-r-balance-model
#12
Yo Niida, Mika Inoue, Mamoru Ozaki, Etsuko Takase
GLI family zinc finger proteins are transcriptional effectors of the sonic hedgehog signaling pathway. GLI regulates gene expression and repression at various phases of embryonic morphogenesis. In humans, 4 GLI genes are known, and GLI2 (2q14.2) and GLI3 (7p14.1) mutations cause different syndromes. Here, we present 2 distinctive cases with a chromosomal microdeletion in one of these genes. Patient 1 is a 14-year-old girl with Culler-Jones syndrome. She manifested short stature, cleft palate, and mild intellectual/social disability caused by a 6...
January 4, 2018: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/29296613/mglur2-3-activation-of-the-sirt1-axis-preserves-mitochondrial-function-in-diabetic-neuropathy
#13
Krish Chandrasekaran, Anjaneyulu Muragundla, Tyler G Demarest, Joungil Choi, Avinash R Sagi, Neda Najimi, Pranith Kumar, Anmol Singh, Cheng-Ying Ho, Gary Fiskum, Lauren G Koch, Steven L Britton, James W Russell
Objectives: There is a critical need to develop effective treatments for diabetic neuropathy. This study determined if a selective mGluR2/3 receptor agonist prevented or treated experimental diabetic peripheral neuropathy (DPN) through glutamate recycling and improved mitochondrial function. Methods: Adult male streptozotocin treated Sprague-Dawley rats with features of type 1 diabetes mellitus (T1DM) or Low Capacity Running (LCR) rats with insulin resistance or glucose intolerance were treated with 3 or 10 mg/kg/day LY379268...
December 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29289537/early-postpartum-metabolic-syndrome-in-women-with-or-without-gestational-diabetes-results-from-life-after-gestational-diabetes-ahvaz-cohort-study
#14
Sedigheh Nouhjah, Hajieh Shahbazian, Nahid Shahbazian, Shayesteh Jahanfar, Alireza Jahanshahi, Bahman Cheraghian, Zeinab Dehghan Mohammadi, Niloofar Ghodrati, Sousan Houshmandi
AIMS: This study aimed to determine the prevalence rate of metabolic syndrome and its potential risk factors, 6-12 weeks postpartum in women with GDM compared to women with normal glucose tolerance. METHODS: LAGAs is an ongoing population-based prospective cohort study that started in March 2015 in Ahvaz, Iran. During 11 months of study progression, 176 women with GDM pregnancy and 86 healthy women underwent a fasting glucose test, 75-g OGTT and fasting lipid tests at 6-12 weeks postpartum...
December 22, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/29288667/chronic-sleep-disorder-induced-by-psychophysiological-stress-induces-glucose-intolerance-without-adipose-inflammation-in-mice
#15
Katsutaka Oishi, Sumika Ohyama, Sayaka Higo-Yamamoto
Sleep disturbances are associated with various metabolic diseases such as hypertension and diabetes. We had previously established a mouse model of a psychophysiological stress-induced chronic sleep disorder (CSD) characterized by disrupted circadian rhythms of wheel-running activity, core body temperature, and sleep-wake cycles. To evaluate the underlying mechanisms of metabolic disorders induced by CSD, we created mice with CSD for six weeks and fed them with a high-fat diet. Glucose intolerance with hyperglycemia resulted, although plasma insulin levels and body weight increases were identical between control and CSD mice...
December 28, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29287842/high-prevalence-of-obesity-among-nursing-personnel-working-in-tertiary-care-hospital
#16
M Aslam, A A Siddiqui, G Sandeep, S V Madhu
AIM: To find out the prevalence of obesity and glucose intolerance among nurses working in tertiary care hospital. METHODS: Study was conducted in 496 apparently healthy females comprising two groups. Group B had 290 nurses and control group A had 206 age matched female subjects of general population. Detailed performa was filled which included anthropometry, systemic examination and other details. Fasting plasma glucose was done followed by oral glucose tolerance test (OGTT)...
December 22, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/29286159/maternal-chromium-restriction-induces-insulin-resistance-in-adult-mice-offspring-through-mirna
#17
Qian Zhang, Xiaofang Sun, Xinhua Xiao, Jia Zheng, Ming Li, Miao Yu, Fan Ping, Zhixin Wang, Cuijuan Qi, Tong Wang, Xiaojing Wang
Increasing evidence suggests that undernutrition during the fetal period may lead to glucose intolerance, impair the insulin response and induce insulin resistance (IR). Considering the importance of chromium (Cr) in maintaining carbohydrate metabolism, the present study aimed to determine the effects of maternal low Cr (LC) on glucose metabolism in C57BL mice offspring, and the involved mechanisms. Weaned C57BL mice were born from mothers fed a control diet or LC diet, and were then fed a control or LC diet for 13 weeks...
December 18, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29282998/clinical-significance-of-neuregulin-4-nrg4-in-gestational-diabetes-mellitus
#18
Meryem Kurek Eken, Cigdem Yayla Abide, Gulcin Sahin Ersoy, Tugba Altun Ensari, Oya Pekin, Ozge Cevik
OBJECTIVE: Gestational diabetes mellitus (GDM) is defined as glucose intolerance detected during pregnancy. GDM is increasing worldwide and is associated with adverse maternal and fetal outcomes. Neuregulin 4 (NGR4) is epidermal growth factor like signaling molecule. It plays an important role in cell to cell communication furthermore recent studies indicate that NRG4 may work as a novel adipokine with a possible role in maintaining energy and metabolic homeostasis. The aim of the present study was to assess serum NRG4 levels along with several metabolic parameters in patients diagnosed with gestational diabetic mellitus...
December 28, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29282544/diet-induced-glucose-homeostasis-dysregulation-is-enhanced-by-taurine-supplementation-in-ovariectomized-mice
#19
Roberta de Souza Santos, Rafael L Camargo, Emerielle C Vanzela, Thiago M Batista, Priscila N Morato, Nayara C Leite, Juliana C Rovani, Marta García-Arévalo, Deborah J Clegg, Everardo M Carneiro
Low levels of estrogens are associated with obesity-related comorbidities. Mice with lower levels of estrogens are thereby more sensitive to the effects of a high-fat-diet (HFD) for the development of glucose intolerance and insulin resistance. Studies in vivo have demonstrated that taurine (TAU) supplementation prevents glucose and insulin resistance. Thus, we aimed to investigate the potential beneficial effects of TAU supplementation on glucose homeostasis of mice with low levels of estrogens fed with a HFD...
December 27, 2017: Amino Acids
https://www.readbyqxmd.com/read/29280303/dual-ccr2-5-antagonist-attenuates-obesity-induced-insulin-resistance-by-regulating-macrophage-recruitment-and-m1-m2-status
#20
Ji Hye Huh, Hong Min Kim, Eun Soo Lee, Mi Hye Kwon, Bo Ra Lee, Hyun-Jeong Ko, Choon Hee Chung
OBJECTIVE: Adipose tissue inflammation induced by macrophage infiltration through the C-C motif chemokine receptor (CCR) 2 or CCR5 pathway has a pivotal role in obesity-related disease and insulin resistance. Here, the effect of PF4178903, a dual CCR2/CCR5 antagonist, on obesity and insulin resistance was evaluated. METHODS: Forty male C57BL/6J mice were divided into four groups as follows: (1) regular diet (RD), (2) RD with PF4178903, (3) high-fat diet (HFD), and (4) HFD with PF4178903...
December 27, 2017: Obesity
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