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https://www.readbyqxmd.com/read/28211512/physiology-and-role-of-irisin-in-glucose-homeostasis
#1
REVIEW
Nikolaos Perakakis, Georgios A Triantafyllou, José Manuel Fernández-Real, Joo Young Huh, Kyung Hee Park, Jochen Seufert, Christos S Mantzoros
Irisin is a myokine that leads to increased energy expenditure by stimulating the 'browning' of white adipose tissue. In the first description of this hormone, increased levels of circulating irisin, which is cleaved from its precursor fibronectin type III domain-containing protein 5, were associated with improved glucose homeostasis by reducing insulin resistance. Consequently, several studies attempted to characterize the role of irisin in glucose regulation, but contradictory results have been reported, and even the existence of this hormone has been questioned...
February 17, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28202005/impact-of-gut-hormone-fgf-19-on-type-2-diabetes-and-mitochondrial-recovery-in-a-prospective-study-of-obese-diabetic-women-undergoing-bariatric-surgery
#2
Lucia Martinez de la Escalera, Ioannis Kyrou, Jana Vrbikova, Voitech Hainer, Petra Sramkova, Martin Fried, Milan K Piya, Sudhesh Kumar, Gyanendra Tripathi, Philip G McTernan
BACKGROUND: The ileal-derived hormone, fibroblast growth factor 19 (FGF-19), may promote weight loss and facilitate type-2 diabetes mellitus remission in bariatric surgical patients. We investigated the effect of different bariatric procedures on circulating FGF-19 levels and the resulting impact on mitochondrial health in white adipose tissue (AT). METHODS: Obese and type-2 diabetic women (n = 39, BMI > 35 kg/m(2)) undergoing either biliopancreatic diversion (BPD), laparoscopic greater curvature plication (LGCP), or laparoscopic adjustable gastric banding (LAGB) participated in this ethics approved study...
February 16, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28192887/linking-resistin-inflammation-and-cardiometabolic-diseases
#3
Hyeong Kyu Park, Mi Kyung Kwak, Hye Jeong Kim, Rexford S Ahima
Adipose tissue secretes a variety of bioactive substances that are associated with chronic inflammation, insulin resistance, and an increased risk of type 2 diabetes mellitus. While resistin was first known as an adipocyte-secreted hormone (adipokine) linked to obesity and insulin resistance in rodents, it is predominantly expressed and secreted by macrophages in humans. Epidemiological and genetic studies indicate that increased resistin levels are associated with the development of insulin resistance, diabetes, and cardiovascular disease...
February 16, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28182091/potential-role-of-angptl4-in-the-cross-talk-between-metabolism-and-cancer-through-ppar-signaling-pathway
#4
REVIEW
Laura La Paglia, Angela Listì, Stefano Caruso, Valeria Amodeo, Francesco Passiglia, Viviana Bazan, Daniele Fanale
The angiopoietin-like 4 (ANGPTL4) protein belongs to a superfamily of secreted proteins structurally related to factors modulating angiogenesis known as angiopoietins. At first, ANGPTL4 has been identified as an adipokine exclusively involved in lipid metabolism, because of its prevalent expression in liver and adipose tissue. This protein regulates lipid metabolism by inhibiting lipoprotein lipase (LPL) activity and stimulating lipolysis of white adipose tissue (WAT), resulting in increased levels of plasma triglycerides (TG) and fatty acids...
2017: PPAR Research
https://www.readbyqxmd.com/read/28170483/diagnosis-and-treatment-of-pituitary-adenomas-a-review
#5
Mark E Molitch
Importance: Pituitary adenomas may hypersecrete hormones or cause mass effects. Therefore, early diagnosis and treatment are important. Observations: Prevalence of pituitary adenomas ranges from 1 in 865 adults to 1 in 2688 adults. Approximately 50% are microadenomas (<10 mm); the remainder are macroadenomas (≥10 mm). Mass effects cause headache, hypopituitarism, and visual field defects. Treatments include transsphenoidal surgery, medical therapies, and radiotherapy...
February 7, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28167127/-with-a-little-help-from-my-friends-the-role-of-microbiota-in-thyroid-hormone-metabolism-and-enterohepatic-recycling
#6
Camilla Virili, Marco Centanni
The gut microbiota is composed of over 1200 species of anaerobes and aerobes bacteria along with bacteriophages, viruses and fungal species. Increasing evidence indicates that the intestinal microbiota, beside digestive equilibrium, is also crucial for immunologic, hormonal and metabolic homeostasis. The intestinal microbiota interacts with distant organs by signals which may be part of the bacteria themselves or their metabolites. Dysbiosis has been observed in inflammatory or autoimmune disorders such as multiple sclerosis or type 1 diabetes as well as in obesity and type 2 diabetes...
February 3, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28164755/regulation-of-na-k-atpase-by-estradiol-and-igf-1-in-cardio-metabolic-diseases
#7
Milan Obradovic, Julijana Stanimirovic, Anastasija Panic, Nikola Bogdanovic, Emina Sudar-Milovanovic, Desanka Cenic-Milosevic, Esma R Isenovic
BACKGROUND: The sodium/potassium- adenosine- triphosphatase (Na+/K+-ATPase) is an important mediator in vasculature tone and contractility, and its abnormal regulation has been implicated in many diseases such as obesity, insulin resistance, diabetes, and hypertension. Decreased Na+/K+-ATPase abundance and its altered isoform expression induce cardiomyocytes death and cardiac dysfunction, possibly leading to the development of myocardial dilation and heart failure. Therefore, the regulation of Na+/K+-ATPase activity/expression could be important in treatment and possible prevention of cardio-metabolic diseases...
February 3, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28161330/testosterone-increases-ccl-2-expression-in-visceral-adipose-tissue-from-obese-women-of-reproductive-age
#8
Nicolás Crisosto, Cristián Flores, Manuel Maliqueo, Bárbara Echiburú, Jaime Vásquez, Fernando Maluenda, Teresa Sir-Petermann
CONTEXT: Hyperandrogenic states and obesity in women are associated with insulin-resistance. Androgens reduce glucose uptake in adipose cells and increase TNFα production in peripheral monocytes. Inflammatory cytokines have a known detrimental effect on insulin resistance. The aim of the present study was to explore the role of testosterone in local cytokine production in visceral adipose tissue from women of reproductive age. DESIGN: Twenty-four women 18-40 years old, undergoing elective abdominal surgery for benign and non-inflammatory conditions, were recruited for the study...
February 1, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28159674/extranuclear-initiated-estrogenic-actions-of-endocrine-disrupting-chemicals-is-there-toxicology-beyond-paracelsus
#9
Angel Nadal, Esther Fuentes, Cristina Ripoll, Sabrina Villar-Pazos, Manuel Castellano-Muñoz, Sergi Soriano, Juan Martinez-Pinna, Ivan Quesada, Paloma Alonso-Magdalena
Endocrine Disrupting Chemicals (EDCs), including bisphenol-A (BPA) do not act as traditional toxic chemicals inducing massive cell damage or death in an unspecific manner. EDCs can work upon binding to hormone receptors, acting as agonists, antagonists or modulators. Bisphenol-A displays estrogenic activity and, for many years it has been classified as a weak estrogen, based on the classic transcriptional action of estrogen receptors serving as transcription factors. However, during the last two decades our knowledge about estrogen signaling has advanced considerably...
January 31, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28144709/glucagon-increase-after-chronic-at1-blockade-is-more-likely-related-to-an-indirect-leptin-dependent-than-to-a-pancreatic-%C3%AE-cell-dependent-mechanism
#10
Martin Mildner, Helge Müller-Fielitz, Ines Stölting, Olaf Jöhren, Muscha Steckelings, Walter Raasch
AT1 blockers (ARB) prevent diabetes by improving pancreatic β cell function. Less is known about whether α cells are affected although they express angiotensin II (AngII) receptors. We aimed to investigate glucagon release upon AngII stimulation. We determined glucagon release after AngII stimulation (0.01-100 μM) in α cells (InR1G9) and isolated murine islets. We determined plasma glucagon in rats that were chronically treated with AngII (9 μg/h) or the ARBs telmisartan (8 mg/kg/day) and candesartan (16 mg/kg/day) and correlated glucagon with additional hormones (e...
January 31, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28141701/mechanisms-of-uterine-artery-dysfunction-in-pregnancy-complications
#11
Jude S Morton, Alison S Care, Sandra T Davidge
Pregnancy is a unique condition and the vascular processes that are required for this undertaking are both complex and extensive. In this review, we discuss the vascular adaptations which occur in the maternal uterine arterial bed to maintain blood supply to the fetal-placental unit. In complicated pregnancies, inadequate remodeling of the uterine arteries, hormonal imbalances, and pre-existing conditions such as obesity, hypertension, diabetes etc. may lead to maladaptations of the uterine vasculature that includes increased vasoconstriction and endothelial dysfunction...
January 30, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28141700/endothelial-and-perivascular-adipose-tissue-abnormalities-in-obesity-related-vascular-dysfunction-novel-targets-for-treatment
#12
Francesca Schinzari, Manfredi Tesauro, Carmine Cardillo
The heavy impact of obesity on the development and progression of cardiovascular disease has sparked sustained efforts to uncover the mechanisms linking excess adiposity to vascular dysfunction. In addition to its well-established role in maintaining vascular homeostasis, the endothelium has been increasingly recognized as a key player in modulating healthy adipose tissue expansion in response to excess calories by providing adipocyte precursors and driving angiogenesis. When this increased storage need is unmet, excessive deposition of fat occurs at ectopic locations, including perivascular adipose tissue (PVAT)...
January 30, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28137218/metabolic-and-cardiovascular-actions-of-nesfatin-1-implications-in-health-and-disease
#13
Naresh Ramesh, Kavishankar Gawli, Venkatakiran Pasupulleti, Suraj Unniappan
BACKGROUND: Metabolic homeostasis is achieved by proper functioning of a complex endocrine milieu, comprising of signals arising from the brain and peripheral tissues. Our knowledge of the factors regulating such balance is rapidly evolving, as new signaling molecules are characterized. Of central interest is nesfatin-1, owing to its multifunctional tissue specific actions regulating food intake, body weight, blood glucose and cardiac functions. METHOD: This review discusses the tissue/system wide distribution and actions of nesfatin-1 in regulating metabolic and cardiovascular functions in healthy conditions and diseases...
January 30, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28134508/synthetic-triterpenoid-inhibition-of-human-ghrelin-o-acyltransferase-the-involvement-of-a-functionally-required-cysteine-provides-mechanistic-insight-into-ghrelin-acylation
#14
Kayleigh R McGovern-Gooch, Nivedita S Mahajani, Ariana Garagozzo, Anthony J Schramm, Lauren G Hannah, Michelle A Sieburg, John D Chisholm, James L Hougland
The peptide hormone ghrelin plays a key role in regulating hunger and energy balance within the body. Ghrelin signaling presents a promising and unexploited target for development of small molecule therapeutics for treatment of obesity, diabetes, and other health conditions. Inhibition of ghrelin O-acyltransferase (GOAT), which catalyzes an essential octanoylation step in ghrelin maturation, offers a potential avenue for controlling ghrelin signaling. Through screening a small molecule library, we have identified a class of synthetic triterpenoids that efficiently inhibit ghrelin acylation by the human isoform of GOAT (hGOAT)...
February 7, 2017: Biochemistry
https://www.readbyqxmd.com/read/28133708/tadalafil-improves-lean-mass-and-endothelial-function-in-nonobese-men-with-mild-ed-luts-in-vivo-and-in-vitro-characterization
#15
Antonio Aversa, Simona Fittipaldi, Davide Francomano, Viviana M Bimonte, Emanuela A Greco, Clara Crescioli, Luigi Di Luigi, Andrea Lenzi, Silvia Migliaccio
PURPOSE: Phosphodiesterase type-5 inhibitor administration in diabetic men with erectile dysfunction (ED) is associated with reduced waist circumference. We evaluated potential effects of daily tadalafil administration on body composition and investigated its possible mechanism(s) of action in C2C12 skeletal muscle cells in vitro. METHODS: Forty-three men on stable caloric intake (mean age 48.5 ± 7; BMI 25.5 ± 0.9 kg/m(2)) complaining mild ED and/or low urinary tract symptoms (LUTS) were randomly assigned to receive tadalafil (TAD) 5 mg/daily (once-a-day=OAD-TAD; n = 23) or 20 mg on-demand (on-demand=OD-TAD; n = 20) for 2 months...
January 30, 2017: Endocrine
https://www.readbyqxmd.com/read/28125073/the-association-between-igf-1-levels-and-the-histologic-severity-of-nonalcoholic-fatty-liver-disease
#16
Laura E Dichtel, Kathleen E Corey, Joseph Misdraji, Miriam A Bredella, Melanie Schorr, Stephanie A Osganian, Brian J Young, Joshua C Sung, Karen K Miller
OBJECTIVES: The mechanisms responsible for the development of nonalcoholic fatty liver disease (NAFLD) and progression to nonalcoholic steatohepatitis (NASH) are incompletely understood. Growing evidence suggests that growth hormone (GH) and insulin-like growth factor-1 (IGF-1) may have roles in the development and progression of NAFLD. We hypothesized that lower serum IGF-1 levels would be associated with increased liver fat accumulation, inflammation, and fibrosis in a group of meticulously phenotyped obese subjects with liver biopsies...
January 26, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28123945/the-neuropeptide-tlqp-21-opposes-obesity-via%C3%A2-c3ar1-mediated-enhancement-of-adrenergic-induced-lipolysis
#17
Cheryl Cero, Maria Razzoli, Ruijun Han, Bhavani Shankar Sahu, Jessica Patricelli, ZengKui Guo, Nathan A Zaidman, John M Miles, Scott M O'Grady, Alessandro Bartolomucci
OBJECTIVES: Obesity is characterized by excessive fat mass and is associated with serious diseases such as type 2 diabetes. Targeting excess fat mass by sustained lipolysis has been a major challenge for anti-obesity therapies due to unwanted side effects. TLQP-21, a neuropeptide encoded by the pro-peptide VGF (non-acronymic), that binds the complement 3a receptor 1 (C3aR1) on the adipocyte membrane, is emerging as a novel modulator of adipocyte functions and a potential target for obesity-associated diseases...
January 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28120721/progranulin-a-new-adipokine-at-the-crossroads-of-metabolic-syndrome-diabetes-dyslipidemia-and-hypertension
#18
Agnieszka Korolczuk, Jerzy Bełtowski
BACKGROUND: Progranulin is a multifunctional regulatory protein with growth-promoting, neuroprotective and antiinflammatory activities. Recent studies indicate that progranulin is one of the adipose tissue hormones (adipokines). Progranulin expression in visceral adipose tissue and circulating progranulin concentration are increased in obesity and hyperprogranulinemia is involved in the pathogenesis of obesity-associated insulin resistance. Progranulin impairs insulin signaling and reduces insulin-induced glucose uptake both in vitro and in vivo whereas progranulin deficiency protects from high fat diet-induced insulin resistance...
January 24, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28120715/hormonal-regulation-of-nitric-oxide-no-in-cardio-metabolic-diseases
#19
Emina Sudar-Milovanovic, Sonja Zafirovic, Aleksandra Jovanovic, Jovana Trebaljevac, Milan Obradovic, Desanka Cenic-Milosevic, Esma R Isenovic
BACKGROUND: Nitric oxide (NO) is a potential biochemical, cardio-metabolic risk marker. The production of NO is catalyzed by different isoforms of enzymes, NO synthases (NOS). An altered NO level is associated with obesity, insulin resistance (IR), diabetes and cardiovascular diseases (CVD). Activity of NOS and NO production are regulated by various hormones under physiological and pathophysiological condition. METHODS: Data used for this review were obtained by searching the electronic database [PUBMED/MEDLINE 1984 - May 2016]...
January 24, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28119159/hindbrain-dpp-iv-inhibition-improves-glycemic-control-and-promotes-negative-energy-balance
#20
Elizabeth G Mietlicki-Baase, Lauren E McGrath, Kieran Koch-Laskowski, Joanna Krawczyk, Tram Pham, Rinzin Lhamo, David J Reiner, Matthew R Hayes
The beneficial glycemic and food intake-suppressive effects of glucagon-like peptide-1 (GLP-1) have made this neuroendocrine system a leading target for pharmacological approaches to the treatment of diabetes and obesity. One strategy to increase the activity of endogenous GLP-1 is to prevent the rapid degradation of the hormone by the enzyme dipeptidyl peptidase-IV (DPP-IV). However, despite the expression of both DPP-IV and GLP-1 in the brain, and the clear importance of central GLP-1 receptor (GLP-1R) signaling for glycemic and energy balance control, the metabolic effects of central inhibition of DPP-IV activity are unclear...
January 22, 2017: Physiology & Behavior
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