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Hyperinsulinemia

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https://www.readbyqxmd.com/read/29237379/male-urogen%C3%A4-tal-d%C3%A4-sorders-and-metabol%C3%A4-c-syndrome-poss%C3%A4-ble-l%C3%A4-nks-character%C3%A4-st%C3%A4-cs-and-potent%C3%A4-al-treatment-strateg%C3%A4-es
#1
Cetin Volkan Oztekin, Ecem Kaya, Didem Yilmaz-Oral, Serap Gur
BACKGROUND: Metabolic syndrome (MetS), as a cluster of metabolic derangements which is major risk factors for vascular disease, is one of the most important threats to public health. Although the epidemiological and limited amount of basic science and clinical evidence link MetS to several male urogenital disorders, a holistic approach aiming to define common mechanistic pathways and new possible therapeutic targets are lacking. OBJECTIVE: The current review has focused on providing scientific evidence on the role of MetS and its components on male urogenital disorders and the definition of new therapeutic targets...
December 12, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29236310/insulin-induces-an-emt-like-process-in-mammary-epithelial-cells-mcf10a
#2
Cecilia Rodriguez-Monterrosas, Ricardo Díaz-Aragon, Elizabeth Leal-Orta, Pedro Cortes-Reynosa, Eduardo Perez Salazar
Diabetes mellitus has been related with an increased risk of breast cancer, whereas it has been suggested that links between diabetes mellitus and cancer are hyperinsulinemia, insulin resistance, hyperglycemia and chronic inflammation induced by adipose tissue. Contribution of hyperinsulinemia to carcinogenesis is mediated through resistance to endogenous insulin and by exogenous insulin used in treatment. Epithelial to mesenchymal transition (EMT) is a process by which epithelial cells are transdifferentiated to a mesenchymal state that has been implicated in cancer progression...
December 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29233100/high-blood-glucose-levels-are-associated-with-higher-risk-of-colon-cancer-in-men-a-cohort-study
#3
Alexandra Vulcan, Jonas Manjer, Bodil Ohlsson
BACKGROUND: High levels of blood glucose are thought to be associated with colorectal cancer (CRC) and hyperinsulinemia, an interstage in the development of CRC. The purpose of this study was to examine associations between incident CRC and blood glucose; plasma insulin; and the homeostasis model assessment for insulin resistance (HOMA2-IR), respectively, and to determine whether these associations were dependent on sex and cancer site. METHODS: The Malmö Diet and Cancer cardiovascular cohort comprises 6103 individuals...
December 12, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29229235/valproic-acid-disrupts-the-oscillatory-expression-of-core-circadian-rhythm-transcription-factors
#4
Chanel A Griggs, Scott W Malm, Rosa Jaime-Frias, Catharine L Smith
Valproic acid (VPA) is a well-established therapeutic used in treatment of seizure and mood disorders as well as migraines and a known hepatotoxicant. About 50% of VPA users experience metabolic disruptions, including weight gain, hyperlipidemia, and hyperinsulinemia, among others. Several of these metabolic abnormalities are similar to the effects of circadian rhythm disruption. In the current study, we examine the effect of VPA exposure on the expression of core circadian transcription factors that drive the circadian clock via a transcription-translation feedback loop...
December 8, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29226618/enteroinsular-hormones-in-two-siblings-with-donohue-syndrome-and-complete-leptin-deficiency
#5
M Güemes, S A Rahman, P Shah, K Hussain
The main biochemical hallmark of the rare and lethal condition of Donohue syndrome (DS) is hyperinsulinemia. The roles of the gut and other pancreatic hormones involved in glucose metabolism, satiety and energy expenditure have not been previously reported in DS. Two siblings with genetically confirmed DS and extremely low weight underwent a mixed meal (MM) test where pancreatic hormones insulin, C-peptide, glucagon, active amylin, pancreatic polypeptide (PP) as well as gut hormones active glucagon-like peptide 1 (GLP-1), glucose-dependent insulinotropic peptide (GIP), ghrelin, peptide YY (PYY) and leptin were analyzed using a Multiplex assay...
December 11, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/29224025/alterations-in-adiposity-and-glucose-homeostasis-in-adult-gasp-1-overexpressing-mice
#6
Luce Périè, Alexis Parenté, Fabienne Baraige, Laetitia Magnol, Véronique Blanquet
BACKGROUND/AIMS: Myostatin is known as a powerful negative regulator of muscle growth playing a key role in skeletal muscle homeostasis. Recent studies revealed that myostatin-deficient mice lead to an increase of insulin sensitivity, a decrease of adiposity and a resistance to obesity, showing that myostatin can also impact on metabolism. Thus, myostatin appeared as a potential therapeutic target to treat insulin resistance. METHODS: We generated transgenic mice overexpressing Gasp-1, a myostatin inhibitor...
December 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29220530/impaired-lipolysis-diminished-fat-oxidation-and-metabolic-inflexibility-in-obese-girls-with-polycystic-ovary-syndrome
#7
Joon Young Kim, Hala Tfayli, Sara F Michaliszyn, Silva Arslanian
CONTEXT: Metabolic flexibility reflects the ability to switch from lipid to carbohydrate oxidation during insulin stimulation manifested in increased respiratory quotient (RQ). Despite insulin resistance in glucose metabolism in PCOS women and adolescents, little is known about adipose tissue metabolism and metabolic flexibility. OBJECTIVE: To investigate whole-body lipolysis, substrate oxidation and metabolic flexibility in obese PCOS vs. non-PCOS girls. PATIENTS/DESIGN: Twenty-one obese (BMI 32...
December 6, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29220408/comparison-of-goto-kakizaki-rats-and-high-fat-diet-induced-obese-rats-are-they-reliable-models-to-study-type-2-diabetes-mellitus
#8
Wilson Mitsuo Tatagiba Kuwabara, Ana Carolina Panveloski-Costa, Caroline Naomi Fukusawa Yokota, Joice Naiara Bertaglia Pereira, Jorge Mancini Filho, Rosangela Pavan Torres, Sandro Massao Hirabara, Rui Curi, Tatiana Carolina Alba-Loureiro
Type 2 Diabetes mellitus (T2DM) is an evident growing disease that affects different cultures throughout the world. T2DM occurs under the influence of three main factors: the genetic background, environmental and behavioral components. Obesity is strongly associated to the development of T2DM in the occident, while in the orient most of the diabetic patients are considered lean. Genetics may be a key factor in the development of T2DM in societies where obesity is not a recurrent public health problem. Herein, two different models of rats were used to understand their differences and reliability as experimental models to study the pathophysiology of T2DM, in two different approaches: the genetic (GK rats) and the environmental (HFD-induced obese rats) influences...
2017: PloS One
https://www.readbyqxmd.com/read/29217128/circulating-irisin-in-patients-with-polycystic-ovary-syndrome-a-meta-analysis
#9
Xue Cai, Shanhu Qiu, Ling Li, Martina Zügel, Jürgen Michael Steinacker, Uwe Schumann
There is growing interest in exploring circulating (plasma/serum) irisin in polycystic ovary syndrome (PCOS) patients. This meta-analysis aimed to summarize the evidence assessing circulating irisin changes in this population. A systematic search was conducted in three databases: PubMed, Cochrane Library and Web of Science, for studies reporting irisin in PCOS patients compared with healthy controls or stratified by body mass index (BMI), or assessing irisin response to hyperinsulinemia. Effect sizes (Cohen's d with 95% confidence intervals [CI]) were calculated using random-effects models...
November 22, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29207011/astragaloside-iv-prevents-kidney-injury-caused-by-iatrogenic-hyperinsulinemia-in-a-streptozotocin%C3%A2-induced-diabetic-rat-model
#10
Ke-Qiang He, Wei-Zu Li, Xiao-Qing Chai, Yan-Yan Yin, Yan Jiang, Wei-Ping Li
Diabetic patients are able to manage their blood glucose with exogenous insulin but, ultimately, remain at risk of diabetic nephropathy (DN). Long‑term use of insulin may lead to iatrogenic hyperinsulinemia, which has been suggested to cause kidney injury. However, there are no effective interventions for iatrogenic hyperinsulinemia leading to kidney damage. In the present paper, the hypothesis that astragaloside IV (AS‑IV), a novel saponin purified from Astragalus membranaceus (Fisch) Bunge, may prevent DN in iatrogenic hyperinsulinemic diabetic rats through antioxidative and anti‑inflammatory mechanisms was investigated...
November 17, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29203627/favorable-vascular-actions-of-angiotensin-1-7-in-human-obesity
#11
Francesca Schinzari, Manfredi Tesauro, Augusto Veneziani, Nadia Mores, Nicola Di Daniele, Carmine Cardillo
Obese patients have vascular dysfunction related to impaired insulin-stimulated vasodilation and increased endothelin-1-mediated vasoconstriction. In contrast to the harmful vascular actions of angiotensin (Ang) II, the angiotensin-converting enzyme 2 product Ang-(1-7) has shown to exert cardiovascular and metabolic benefits in experimental models through stimulation of the Mas receptor. We, therefore, examined the effects of exogenous Ang-(1-7) on vasodilator tone and endothelin-1-dependent vasoconstriction in obese patients...
January 2018: Hypertension
https://www.readbyqxmd.com/read/29203613/nfe2l1-silenced-insulinoma-cells-acquire-aggressiveness-and-chemo-resistance
#12
Jingqi Fu, Hongzhi Zheng, Qi Cui, Chengjie Chen, Simeng Bao, Jing Sun, Lu Li, Bei Yang, Huihui Wang, Yongyong Hou, Yuanyuan Xu, Yuanhong Xu, Qiang Zhang, Jingbo Pi
The transcription factor nuclear factor erythroid 2 like 1 (NFE2L1 or NRF1) is involved in various critical cell processes such as maintenance of ubiquitin-proteasome system and regulation of the cellular antioxidant response. We previously determined that pancreatic β-cell-specific Nfe2l1-knockout mice had hyperinsulinemia, and that silencing of Nfe2l1 in mouse islets or MIN6 insulinoma β-cells induced elevated basal insulin release and altered glucose metabolism. Hypoglycemia is a major issue with aggressive insulinomas, although a role of NFE2L1 in this pathology is not defined...
December 4, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/29200886/monitoring-and-management-of-hypertension-with-obesity-in-adolescents
#13
REVIEW
Bonita Falkner
Largely due to the childhood obesity epidemic, there has been an increase in the prevalence of hypertension in children and adolescents. Obesity associated hypertension is the most common hypertension phenotype among adolescents. Approximately 30% of obese adolescents have elevated blood pressure (BP) or hypertension. Updated definitions of elevated BP and hypertension in adolescents are now similar to definitions of BP status in adults. For adolescents ≥13 years of age, elevated BP is 120 to 129/<80 mm Hg...
2017: Integrated Blood Pressure Control
https://www.readbyqxmd.com/read/29193779/insulin-access-to-skeletal-muscle-is-preserved-in-obesity-induced-by-polyunsaturated-diet
#14
Josiane L Broussard, Richard N Bergman, Isaac Asare Bediako, Rebecca L Paszkiewicz, Malini S Iyer, Cathryn M Kolka
OBJECTIVE: Diets high in saturated fat induce obesity and insulin resistance and impair insulin access to skeletal muscle, leading to reduced insulin levels at the muscle cell surface available to bind insulin receptors and induce glucose uptake. In contrast, diets supplemented with polyunsaturated fat improve insulin sensitivity (SI) and reduce the risk for type 2 diabetes. It was hypothesized that a diet high in polyunsaturated fat would preserve SI and insulin access to muscle, as compared with a diet high in saturated fat...
November 30, 2017: Obesity
https://www.readbyqxmd.com/read/29184811/dermatologic-manifestations-of-endocrine-disorders
#15
REVIEW
Michael Lause, Alisha Kamboj, Esteban Fernandez Faith
The skin serves as a window for clinicians to understand, diagnose, and monitor endocrine disease. Dermatologic manifestations of endocrinopathies contribute significantly to an individual's health and quality of life. In this review, we outline various disorders of the hypothalamic-pituitary axis, thyroid gland, pancreas, adrenal gland, and androgen axis as well as hereditary endocrine syndromes. In acromegaly, glycosaminoglycan deposition contributes to a thickening of skin and soft tissue, which manifests as coarsening and enlargement of facial and acral structures...
October 2017: Translational Pediatrics
https://www.readbyqxmd.com/read/29184536/insulin-resistance-any-role-in-the-changing-epidemiology-of-thyroid-cancer
#16
REVIEW
Roberta Malaguarnera, Veronica Vella, Maria Luisa Nicolosi, Antonino Belfiore
In the past few decades, the incidence of thyroid cancer (TC), namely of its papillary hystotype (PTC), has shown a steady increase worldwide, which has been attributed at least in part to the increasing diagnosis of early stage tumors. However, some evidence suggests that environmental and lifestyle factors can also play a role. Among the potential risk factors involved in the changing epidemiology of TC, particular attention has been drawn to insulin-resistance and related metabolic disorders, such as obesity, type 2 diabetes, and metabolic syndrome, which have been also rapidly increasing worldwide due to widespread dietary and lifestyle changes...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29172109/the-oral-glucose-test-predicts-laminitis-risk-in-ponies-fed-a-diet-high-in-nonstructural-carbohydrates
#17
A D Meier, M A de Laat, D B Reiche, C C Pollitt, D M Walsh, J M McGree, M N Sillence
The aim of this study was to investigate the relationship between laminitis development in ponies and insulin/glucose concentrations in response to the oral glucose test (OGT) and a dietary challenge high in nonstructural carbohydrates (NSCs). After undergoing an OGT (1 g dextrose/kg BW in feed), 37 ponies with 2-h serum insulin concentrations ranging from 22 to 1,133 μIU/mL were subjected to a diet challenge period (DCP), consuming 12 g NSC/kg BW/d for up to 18 d. Insulin and glucose responses were measured on day 2 of the DCP...
November 16, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/29170160/insulin-selectively-reduces-mitochondrial-uncoupling-in-brown-adipose-tissue-in-mice
#18
Blake W Dallon, Brian A Parker, Aimee E Hodson, Trevor S Tippetts, Mitchell E Harrison, M Marissa A Appiah, Jeffrey E Witt, Jonathan L Gibbs, Harrison M Gray, Thomas M Sant, Benjamin T Bikman
Objective The purpose of this study was to determine the effects of prolonged hyperinsulinemia on mitochondrial respiration and uncoupling in distinct adipose tissue depots. Methods. Sixteen-wk-old male mice were injected daily with placebo or insulin to induce an artificial hyperinsulinemia for 28 d. Following treatment period, mitochondrial respiration and degree of uncoupling was determined in permeabilized perirenal, inguinal, and interscapular adipose tissue. Results. White adipose tissue (WAT) mitochondria (inguinal and perirenal) respire at substantially lower rates compared with brown adipose tissue (BAT)...
November 23, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29162603/exogenous-insulin-infusion-can-decrease-atherosclerosis-in-diabetic-rodents-by-improving-lipids-inflammation-and-endothelial-function
#19
Kyoungmin Park, Qian Li, Net Daş Evcimen, Christian Rask-Madsen, Yasutaka Maeda, Ernesto Maddaloni, Hisashi Yokomizo, Takanori Shinjo, Ronald St-Louis, Jialin Fu, Daniel Gordin, Mogher Khamaisi, David Pober, Hillary Keenan, George L King
OBJECTIVE: The objective of this study is to evaluate whether exogenously induced hyperinsulinemia may increase the development of atherosclerosis. APPROACH AND RESULTS: Hyperinsulinemia, induced by exogenous insulin implantation in high-fat fed (60% fat HFD) apolipoprotein E-deficient mice (ApoE-/-) mice, exhibited insulin resistance, hyperglycemia, and hyperinsulinemia. Atherosclerosis was measured by the accumulation of fat, macrophage, and extracellular matrix in the aorta...
November 21, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29161316/acute-exercise-alters-skeletal-muscle-mitochondrial-respiration-and-h2o2-emission-in-response-to-hyperinsulinemic-euglycemic-clamp-in-middle-aged-obese-men
#20
Adam J Trewin, Itamar Levinger, Lewan Parker, Christopher S Shaw, Fabio R Serpiello, Mitchell J Anderson, Glenn K McConell, David L Hare, Nigel K Stepto
Obesity, sedentary lifestyle and aging are associated with mitochondrial dysfunction and impaired insulin sensitivity. Acute exercise increases insulin sensitivity in skeletal muscle; however, whether mitochondria are involved in these processes remains unclear. The aim of this study was to investigate the effects of insulin stimulation at rest and after acute exercise on skeletal muscle mitochondrial respiratory function (JO2) and hydrogen peroxide emission (JH2O2), and the associations with insulin sensitivity in obese, sedentary men...
2017: PloS One
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