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https://www.readbyqxmd.com/read/28735463/impact-of-pioglitazone-on-bone-mineral-density-and-bone-marrow-fat-content
#1
L M Pop, I Lingvay, Q Yuan, X Li, B Adams-Huet, N M Maalouf
Pioglitazone use is associated with an increased risk of fractures. In this randomized, placebo-controlled study, pioglitazone use for 12 months was associated with a significant increase in bone marrow fat content at the femoral neck, accompanied by a significant decrease in total hip bone mineral density. The change in bone marrow fat with pioglitazone use was predominantly observed in female vs. male participants. INTRODUCTION: Use of the insulin sensitizer pioglitazone is associated with greater fracture incidence, although the underlying mechanisms are incompletely understood...
July 22, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28733671/short-chain-fatty-acids-and-inulin-but-not-guar-gum-prevent-diet-induced-obesity-and-insulin-resistance-through-differential-mechanisms-in-mice
#2
Karolin Weitkunat, Christin Stuhlmann, Anna Postel, Sandra Rumberger, Maria Fankhänel, Anni Woting, Klaus Jürgen Petzke, Sabrina Gohlke, Tim J Schulz, Michael Blaut, Susanne Klaus, Sara Schumann
The role of dietary fibre and short-chain fatty acids (SCFA) in obesity development is controversially discussed. Here, we investigated how various types of dietary fibre and different SCFA ratios affect metabolic syndrome-related disorders. Male mice (B6) were fed high-fat diets supplemented with dietary fibres (either cellulose, inulin or guar gum) or different Ac:Pr ratios (high acetate (HAc) or propionate (HPr)) for 30 weeks. Body-fat gain and insulin resistance were greatly reduced by inulin, but not by guar gum, and completely prevented by SCFA supplementation...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28730728/beneficial-long-term-antidiabetic-actions-of-n-and-c-terminally-modified-analogues-of-apelin-13-in-diet-induced-obese-diabetic-mice
#3
V Parthsarathy, C Hogg, P R Flatt, F P M O'Harte
AIMS: This study investigated the chronic effects of twice daily administration of stable apelin analogues, apelin-13 amide and (pGlu)apelin-13 amide, on metabolic parameters in glucose intolerant and insulin resistant diet-induced obese (DIO) mice fed a high-fat diet for 150 days. STUDY DESIGN & METHODS: Groups of mice received twice daily (09:00 and 17:00 h) injections of saline vehicle, apelin-13 amide, (pGlu)apelin-13 amide or exendin-4(1-39) for 28 days (all at 25 nmol/kg)...
July 20, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28728946/serum-galectin-1-levels-are-positively-correlated-with-body-fat-and-negatively-with-fasting-glucose-in-obese-children
#4
Sezer Acar, Ahu Paketçi, Tuncay Küme, Hale Tuhan, Özlem Gürsoy Çalan, Korcan Demir, Ece Böber, Ayhan Abaci
Galectin-1, a recently identified peptide, is primarily released from the adipose tissue. Although galectin-1 was shown to have an anti-inflammatory effect, its specific function is not clearly understood. We aimed to evaluate the relationship of serum galectin-1 levels with clinical and laboratory parameters in childhood obesity. A total of 45 obese children (mean age: 12.1±3.1years) and 35 normal-weight children (mean age: 11.8±2.2years) were enrolled. Clinical [body mass index (BMI), waist circumference (WC), percentage of body fat and blood pressure] and biochemical [glucose, insulin, lipids, galectin-1, high-sensitive C-reactive protein (hsCRP) and leptin levels] parameters were assessed...
July 17, 2017: Peptides
https://www.readbyqxmd.com/read/28728620/insulin-resistance-and-hypertension-in-obese-youth-with-sleep-disordered-breathing-treated-with-positive-airway-pressure-a-prospective-multicenter-study
#5
Sherri L Katz, Joanna E MacLean, Lynda Hoey, Linda Horwood, Nicholas Barrowman, Bethany Foster, Stasia Hadjiyannakis, Laurent Legault, Glenda N Bendiak, Valerie G Kirk, Evelyn Constantin
STUDY OBJECTIVES: There is evidence that cardiometabolic disease associated with obesity and sleep-disordered breathing (SDB) in adults is present in youth. SDB is often treated with positive airway pressure (PAP) in youth with obesity. Our aims were to determine: (1) the prevalence of cardiometabolic disease and (2) whether PAP improves markers of cardiometabolic disease, in youth with obesity and newly diagnosed moderate-severe SDB. METHODS: A prospective multicenter cohort study was conducted in youth (8 to 16 years old) with obesity, prescribed PAP therapy for newly diagnosed moderate-severe SDB...
July 14, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28726642/coordinated-transcriptional-control-of-adipocyte-triglyceride-lipase-atgl-by-transcription-factors-sp1-and-ppar%C3%AE-during-adipocyte-differentiation
#6
Debasish Roy, Kenneth T Farabaugh, Jing Wu, Alyssa Charrier, Cynthia Smas, Maria Hatzoglou, Kavitha Thirumurugan, David A Buchner
The breakdown of stored fat deposits into its components is a highly regulated process that maintains plasma levels of free fatty acids to supply energy to cells. Insulin-mediated transcription of Atgl, the enzyme that mediates the rate-limiting step in lipolysis, is a key point of this regulation. In conditions such as obesity or insulin resistance, Atgl transcription is often misregulated, which can contribute to overall disease progression. The mechanisms by which Atgl is induced during adipogenesis are not fully understood...
July 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28726640/c1q-tnf-related-protein-6-ctrp6-links-obesity-to-adipose-tissue-inflammation-and-insulin-resistance
#7
Xia Lei, Marcus M Seldin, Hannah C Little, Nicholas Choy, Thomas Klonisch, G William Wong
Obesity is associated with chronic low-grade inflammation, and metabolic regulators linking obesity to inflammation have therefore received much attention. Secreted C1q/TNF-related proteins (CTRPs) are one such group of regulators that regulate glucose and fat metabolism in peripheral tissues and modulate inflammation in adipose tissue. We have previously shown that expression of CTRP6 is up-regulated in leptin-deficient mice and, conversely, down-regulated by the anti-diabetic drug, rosiglitazone. Here, we provide evidence for a novel role of CTRP6 in modulating both inflammation and insulin sensitivity...
July 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28726334/insulin-sensitivity-across-the-lifespan-from-obese-adolescents-to-obese-adults-with-impaired-glucose-tolerance-who-is-worse-off
#8
Silva Arslanian, Joon Young Kim, Alexis Nasr, Fida Bacha, Hala Tfayli, SoJung Lee, Frederico G S Toledo
OBJECTIVE: Youth type 2 diabetes mellitus (T2DM) occurs decades earlier than adult T2DM and is characterized by high therapeutic failure rates and decreased response to insulin sensitizers suggesting a more severe disease process than in adults. To explain these observations, we hypothesized that insulin resistance is worse in obese youth than adults with impaired glucose tolerance (IGT), a state of high-risk for T2DM. As proof-of-concept, we compared insulin sensitivity between BMI-, sex-, and race-matched obese youth vs adults with IGT...
July 20, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28725599/effects-of-metformin-on-endothelial-health-and-erectile-dysfunction
#9
REVIEW
Jay Pravin Patel, Eric Hweegeun Lee, Carlos Ignacio Mena, Charles N Walker
Erectile dysfunction (ED) affects approximately 18 million American men. ED may be attributed to several etiologies, including arteriogenic, psychogenic, neurogenic, hormonal, drug-induced, and systemic disease or aging related factors. Specific to arteriogenic ED, three major mechanisms have been identified: (I) endothelium-dependent vasodilatory impairment; (II) sympathetic nerve activity elevation; (III) atherosclerotic luminal narrowing. Additionally, these insults have been linked to the insulin resistant state, which in turn is comorbid with obesity, dyslipidemia, diabetes, and hypertension...
June 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28724846/metabolic-and-inflammatory-changes-with-orlistat-and-sibutramine-treatment-in-obese-malaysian-subjects
#10
Belqes Abdullah Mohammad Al-Tahami, Ab Aziz Al-Safi Ismail, Zulkefli Sanip, Zurkurnai Yusoff, Tg Muzaffar Tm Shihabudin, Taran Singh Pall Singh, Aida Hanum Ghulam Rasool
INTRODUCTION: Obesity is associated with numerous health problems, particularly metabolic and cardiovascular complications. This study aimed to assess the effects that, nine months of pharmacological intervention with orlistat or sibutramine, on obese Malaysians' body weight and compositions, metabolic profiles and inflammatory marker. METHODS: Seventy-six obese subjects were randomly placed into two groups. The first group received three daily 120 mg dosages of orlistat for nine months (n=39), and the second group received a once daily 10 or 15 mg dosage of sibutramine for nine months (n=37)...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28723567/cold-inducible-sirt6-regulates-thermogenesis-of-brown-and-beige-fat
#11
Lu Yao, Xiaona Cui, Qi Chen, Xiaoying Yang, Fude Fang, Jun Zhang, Guoqing Liu, Wanzhu Jin, Yongsheng Chang
Promoting development and function of brown and beige fat may reduce obesity. Here, we show that fat SIRT6 expression is markedly induced by cold exposure and a β-adrenergic agonist. Deletion of SIRT6 in adipose tissue impairs the thermogenic function of brown adipocytes, causing a morphological "whitening" of brown fat, reduced oxygen (O2) consumption, obesity, decreased core body temperature, and cold sensitivity. Fat SIRT6-deleted mice exhibit increased blood glucose levels, severe insulin resistance, and hepatic steatosis...
July 18, 2017: Cell Reports
https://www.readbyqxmd.com/read/28722653/directing-visceral-white-adipocyte-precursors-to-a-thermogenic-adipocyte-fate-improves-insulin-sensitivity-in-obese-mice
#12
Chelsea Hepler, Mengle Shao, Jonathan Y Xia, Alexandra L Ghaben, Mackenzie J Pearson, Lavanya Vishvanath, Ankit X Sharma, Thomas S Morley, William L Holland, Rana K Gupta
Visceral adiposity confers significant risk for developing metabolic disease in obesity whereas preferential expansion of subcutaneous white adipose tissue (WAT) appears protective. Unlike subcutaneous WAT, visceral WAT is resistant to adopting a protective thermogenic phenotype characterized by the accumulation of Ucp1(+) beige/BRITE adipocytes (termed "browning"). In this study, we investigated the physiological consequences of browning murine visceral WAT by selective genetic ablation of Zfp423, a transcriptional suppressor of the adipocyte thermogenic program...
July 19, 2017: ELife
https://www.readbyqxmd.com/read/28721400/weight-adjusted-lean-body-mass-and-calf-circumference-are-protective-against-obesity-associated-insulin-resistance-and-metabolic-abnormalities
#13
Toshinari Takamura, Yuki Kita, Masatoshi Nakagen, Masaru Sakurai, Yuki Isobe, Yumie Takeshita, Kohzo Kawai, Takeshi Urabe, Shuichi Kaneko
BACKGROUND: To test the hypothesis that preserved muscle mass is protective against obesity-associated insulin resistance and metabolic abnormalities, we analyzed the relationship of lean body mass and computed tomography-assessed sectional areas of specific skeletal muscles with insulin resistance and metabolic abnormalities in a healthy cohort. METHODS: A total of 195 subjects without diabetes who had completed a medical examination were included in this study...
July 2017: Heliyon
https://www.readbyqxmd.com/read/28721138/the-effect-of-orlistat-versus-metformin-on-body-composition-and-insulin-resistance-in-obese-premenopausal-women-3-month-randomized-prospective-open-label-study
#14
Magdalena Kujawska-Łuczak, Katarzyna Musialik, Monika Szulińska, Ewelina Swora-Cwynar, Angelina Kargulewicz, Małgorzata Grzymisławska, Danuta Pupek-Musialik, Paweł Bogdański
INTRODUCTION: Our aim was to evaluate the effects of metformin and orlistat on body composition and glucose-insulin homeostasis in obese premenopausal women. MATERIAL AND METHODS: Seventy-three obese premenopausal Caucasian women aged 32.4 ±8.3 years were treated with either metformin (1000 mg/day; n = 37) or orlistat (360 mg/day; n = 36). Anthropometric parameters were measured using dual-energy X-ray absorptiometry. Glucose tolerance, using the oral glucose tolerance test; insulin resistance, using the homeostasis model assessment (HOMA-IR); and insulin sensitivity, using the Matsuda insulin sensitivity index (ISI Matsuda), were assessed at the commencement of the study and after 3 months...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28720899/p32-heterozygosity-protects-against-age-and-diet-induced-obesity-by-increasing-energy-expenditure
#15
Yong Liu, Patrick L Leslie, Aiwen Jin, Koji Itahana, Lee M Graves, Yanping Zhang
Obesity is increasing in prevalence and has become a global public health problem. The main cause of obesity is a perturbation in energy homeostasis, whereby energy intake exceeds energy expenditure. Although mitochondrial dysfunction has been linked to the deregulation of energy homeostasis, the precise mechanism is poorly understood. Here, we identify mitochondrial p32 (also known as C1QBP) as an important regulator of lipid homeostasis that regulates both aerobic and anaerobic energy metabolism. We show that while whole-body deletion of the p32 results in an embryonic lethal phenotype, mice heterozygous for p32 are resistant to age- and high-fat diet-induced ailments, including obesity, hyperglycemia, and hepatosteatosis...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719892/cinnamaldehyde-ameliorates-diet-induced-obesity-in-mice-by-inducing-browning-of-white-adipose-tissue
#16
Jiacheng Zuo, Dandan Zhao, Na Yu, Xin Fang, Qianqian Mu, Yue Ma, Fangfang Mo, Rui Wu, Rufeng Ma, Lili Wang, Ruyuan Zhu, Haixia Liu, Dongwei Zhang, Sihua Gao
BACKGROUND/AIMS: Obesity has become a major health concern with few effective medications. Cinnamaldehyde (CA) has been reported to exhibit anti-diabetic and anti-inflammatory properties. However, whether CA shows anti-obesity activity remains unknown. Therefore, the present study aimed to investigate the potential anti-obesity effects of CA on mice fed a high-fat diet (HFD) and to explore the possible mechanisms involved. METHODS: Male C57BL/6J mice fed an HFD for 12 weeks were supplemented with CA (40 mg/kg/day) via gavage for an additional 8 weeks...
July 18, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28718949/high-dosage-of-vitamin-d-regulates-the-energy-metabolism-and-increases-insulin-sensitivity-but-are-associated-with-high-levels-of-kidney-damage
#17
Rafael Calais Gaspar, José Diego Botezelli, Gabriel Keine Kuga, Vitor Rosetto Muñoz, Andressa Coope, Rodrigo Martins Pereira, Adelino Sanchez Ramos da Silva, Dennys Esper Cintra, Leandro Pereira de Moura, Eduardo Rochete Ropelle, José Rodrigo Pauli
Preclinical Research Metabolic disorders are responsible for more than 60% of all deaths worldwide. Calcitriol or vitamin D (vitD) deficiency is associated with a large proportion of these diseases is an important therapeutic target for exploration. This study evaluated the administration of high doses of vitD (3000 IU/kg) in obese and insulin-resistant C57BL/6J mice. Our results demonstrated that although high doses of vitD provided metabolic benefits such as increased insulin sensitivity and decreased body mass, this was associated with significant damage in the kidneys of obese mice...
July 18, 2017: Drug Development Research
https://www.readbyqxmd.com/read/28718215/usp18-protects-against-hepatic-steatosis-and-insulin-resistance-via-its-dub-activity
#18
Shimin An, Ling-Ping Zhao, Li-Jun Shen, Siyuan Wang, Kuo Zhang, Yu Qi, Jilin Zheng, Xiao-Jing Zhang, Xue-Yong Zhu, Rong Bao, Ling Yang, Yue-Xin Lu, Zhi-Gang She, Yi-Da Tang
Non-alcoholic fatty liver disease (NAFLD) is characterized by hepatic steatosis, impaired insulin sensitivity and chronic low-grade inflammation. However, the pathogenic mechanism of NAFLD is poorly understood, which hinders the exploration of possible treatments. Here, we first report that ubiquitin-specific protease 18 (USP18), a member of the deubiquitinating (DUB) enzyme family, plays regulatory roles in NAFLD progression. The expression of USP18 was down-regulated in the livers of non-alcoholic steatohepatitis (NASH) patients and high-fat diet (HFD) induced or genetically obese mice...
July 17, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28713332/childhood-maltreatment-is-an-independent-risk-factor-for-prediabetic-disturbances-in-glucose-regulation
#19
Li Li, W Timothy Garvey, Barbara A Gower
AIMS: Childhood maltreatment (CM) is shown to be associated with obesity and depression. However, the relationship of CM to prediabetic state is much less studied. We tested the hypothesis that CM increases the risk for prediabetic state due to glucose intolerance, reduced insulin sensitivity, and beta cell function. METHODS: Oral glucose tolerance test (OGTT)-derived metabolic parameters of glucose tolerance, insulin sensitivity, and beta cell function were measured in 121 participants aged 19-60 years...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28713285/amiloride-improves-endothelial-function-and-reduces-vascular-stiffness-in-female-mice-fed-a-western-diet
#20
Luis A Martinez-Lemus, Annayya R Aroor, Francisco I Ramirez-Perez, Guanghong Jia, Javad Habibi, Vincent G DeMarco, Brady Barron, Adam Whaley-Connell, Ravi Nistala, James R Sowers
Obese premenopausal women lose their sex related cardiovascular disease protection and develop greater arterial stiffening than age matched men. In female mice, we have shown that consumption of a Western diet (WD), high in fat and refined sugars, is associated with endothelial dysfunction and vascular stiffening, which occur via activation of mineralocorticoid receptors and associated increases in epithelial Na(+) channel (ENaC) activity on endothelial cells (EnNaC). Herein our aim was to determine the effect that reducing EnNaC activity with a very-low-dose of amiloride would have on decreasing endothelial and arterial stiffness in young female mice consuming a WD...
2017: Frontiers in Physiology
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