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Hyperinsulinemia

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https://www.readbyqxmd.com/read/29449893/endoplasmic-reticulum-stress-activation-in-adipose-tissue-induces-metabolic-syndrome-in-individuals-with-familial-partial-lipodystrophy-of-the-dunnigan-type
#1
Maria C Foss-Freitas, Rafael C Ferraz, Luciana Z Monteiro, Patricia M Gomes, Ricardo Iwakura, Luiz Carlos C de Freitas, Milton C Foss
Background: Familial partial lipodystrophy of the Dunnigan type is one of the most common inherited lipodystrophies variables. These individuals have important metabolic disorders that cause predisposition to various diseases. In this study we aimed to demonstrate the relation between the metabolic abnormalities, inflammatory profile and the expression of genes involved in the activation of the endoplasmic reticulum stress (ERS) in subjects with FPLD. Methods: We evaluated 14 female FPLD patients and compared with 13 female healthy individuals...
2018: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/29449181/roux-en-y-gastric-bypass-hypoglycemia-resolves-with-gastric-feeding-or-reversal-confirming-a-non-pancreatic-etiology
#2
Dawn Belt Davis, Jad Khoraki, Martynas Ziemelis, Sirinart Sirinvaravong, Jee Young Han, Guilherme M Campos
OBJECTIVE: Postprandial hypoglycemia is an infrequent but disabling complication of Roux-en-Y gastric bypass (RYGB) surgery. Controversy still exists as to whether the postprandial hyperinsulinemia observed is due to inherent changes in pancreatic β-cell mass or function or to reversible alterations caused by RYGB anatomy. We aimed to determine if gastric feeding or reversal of RYGB would normalize postprandial glucose and hormone excursions in patients with symptomatic hypoglycemia...
January 31, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29440390/high-dietary-fat-and-sucrose-results-in-an-extensive-and-time-dependent-deterioration-in-health-of-multiple-physiological-systems-in-mice
#3
James G Burchfield, Melkam A Kebede, Christopher C Meoli, Jacqueline Stöckli, P Tess Whitworth, Amanda L Wright, Nolan J Hoffman, Annabel Y Minard, Xiuquan Ma, James R Krycer, Marin E Nelson, Shi-Xiong Tan, Belinda Yau, Kristen C Thomas, Natalie K Y Wee, Ee-Cheng Khor, Ronaldo F Enriquez, Bryce Vissel, Trevor J Biden, Paul A Baldock, Kyle L Hoehn, James Cantley, Gregory J Cooney, David E James, Daniel J Fazakerley
Obesity is associated with metabolic dysfunction, including insulin resistance and hyperinsulinemia, and with disorders such as cardiovascular disease, osteoporosis, and neurodegeneration. Typically, these pathologies are examined in discrete model systems and with limited temporal resolution, and whether these disorders co-occur is therefore unclear. To address this question, we examined multiple physiological systems in male C57BL/6J mice following prolonged exposure to a high-fat/high-sucrose diet (HFHSD)...
February 13, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29438162/serum-glucose-and-insulin-and-risk-of-cancers-of-the-breast-endometrium-and-ovary-in-postmenopausal-women
#4
Geoffrey C Kabat, Mimi Y Kim, Dorothy S Lane, Oleg Zaslavsky, Gloria Y F Ho, Juhua Luo, Wanda K Nicholson, Rowan T Chlebowski, Wendy E Barrington, Mara Z Vitolins, Xiaochen Lin, Simin Liu, Thomas E Rohan
Limited evidence suggests that hyperinsulinemia may contribute to the risk of breast, endometrial, and, possibly, ovarian cancer. The aim of this study was to assess the association of serum glucose and insulin with risk of these cancers in postmenopausal women, while taking into account potential confounding and modifying factors. We studied 21 103 women with fasting baseline insulin and glucose measurements in a subsample of the Women's Health Initiative. The subsample was composed of four studies within Women's Health Initiative with different selection and sampling strategies...
February 12, 2018: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/29434922/association-of-abnormal-glucose-metabolism-and-insulin-resistance-in-patients-with-atypical-and-typical-endometrial-cancer
#5
Yongjing Lai, Chuanying Sun
This study aimed to detect glucose metabolism indicators and insulin resistance index in patients with endometrial cancer, and to explore the clinical significance and correlation between them. A total of 65 patients with endometrial cancer (52 of typical endometrial and 13 cases of atypical endometrial cancer patients, 27 with diabetes mellitus, and 38 cases without diabetes mellitus) were selected at the People's Hospital of Rizhao from June, 2010 to June, 2016 to serve as the observation group. During the same period, 62 patients with endometrial benign lesions (24 with diabetes mellitus and 38 cases without diabetes mellitus) were selected as the control group...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434814/metformin-and-pioglitazone-combination-therapy-ameliorate-polycystic-ovary-syndrome-through-ampk-pi3k-jnk-pathway
#6
Yuanyuan Wu, Pengfen Li, Dan Zhang, Yingpu Sun
Polycystic ovary syndrome (PCOS) is a common gynecological endocrine disorder, which results in health problems such as menstrual disorders, hyperandrogenism and persistent anovulation. Hyperandrogenism and insulin resistance are the basic characteristics of PCOS. To investigate the combined effect of metformin and pioglitazone on POCS and the potential mechanisms, a rat model of PCOS was established by intramuscular injection of estradiol valerate (EV). The effect of metformin and pioglitazone monotherapy or combination therapy in control rats and PCOS rats was evaluated, involving the testosterone level, follicular development and insulin resistance...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29428365/the-mechanisms-linking-obesity-to-colon-cancer-an-overview
#7
REVIEW
Aleksandra Tarasiuk, Paula Mosińska, Jakub Fichna
Obesity, characterised as a chronic low-grade inflammation is a crucial risk factor for colon cancer. The expansion of the adipose tissue is related to elevated triglyceride and low-density lipoprotein (LDL) levels and hyperinsulinemia, which all are presumed mediators of the tumour development. Obesity is also believed to support carcinogenesis by activating the insulin/IGF-1 pathway. Moreover, obesity increases the level of proinflammatory cytokines (e.g. TNF-α, IL-1, and IL-6) and has a significant impact on selected adipokines...
February 7, 2018: Obesity Research & Clinical Practice
https://www.readbyqxmd.com/read/29426356/the-correlation-between-serum-amh-and-homa-ir-among-pcos-phenotypes
#8
Budi Wiweko, Indra Indra, Cynthia Susanto, Muharam Natadisastra, Andon Hestiantoro
BACKGROUND: Polycystic ovarian syndrome (PCOS) is known to be one of the most prevalent endocrine disorders affecting reproductive age women. One of the endocrine disorder is hyperinsulinemia, which corresponds with the severity of PCOS. However, the pathogenesis of PCOS is not fully understood, but one theory of anti-mullerian hormone (AMH) has been proposed as one of the factor related to the degree of severity of PCOS. However, there are no clear correlation between levels of AMH with the incidence of insulin resistance in PCOS patients especially in Indonesia...
February 9, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29425766/antidiabetic-effects-of-sglt2-inhibitor-ipragliflozin-in-type-2-diabetic-mice-fed-diets-containing-different-carbohydrate-contents
#9
Atsuo Tahara, Toshiyuki Takasu
AIMS: Daily intake of carbohydrates differs among individual patients with type 2 diabetes. Here, we investigated whether or not dietary carbohydrate content affects the efficacy of the sodium-glucose cotransporter 2 (SGLT2) inhibitor ipragliflozin in type 2 diabetic mice. MAIN METHODS: Diabetic mice were fed a regular (50% kcal), high (75% kcal)-, or low (25% kcal)-carbohydrate diet. Ipragliflozin was orally administered once a day for 4 weeks. KEY FINDINGS: In all groups, mice exhibited characteristics of type 2 diabetes, including hyperglycemia, hyperinsulinemia, and obesity...
February 6, 2018: Life Sciences
https://www.readbyqxmd.com/read/29417372/adipose-tissue-but-not-skeletal-muscle-sirtuin-1-expression-is-decreased-in-obesity-and-related-to-insulin-sensitivity
#10
Magdalena Stefanowicz, Agnieszka Nikołajuk, Natalia Matulewicz, Monika Karczewska-Kupczewska
PURPOSE: Sirtuin 1 may regulate glucose and lipid metabolism. We aimed to assess adipose tissue and skeletal muscle sirtuin 1 expression in relation to insulin sensitivity, the expression of proinflammatory and metabolic genes, and to study the regulation of sirtuin 1 expression by hyperinsulinemia and circulating free fatty acids elevation. METHODS: We examined 60 normal-weight, 42 overweight and 15 obese young subjects. The hyperinsulinemic-euglycemic clamp technique was applied throughout to measure insulin sensitivity...
February 7, 2018: Endocrine
https://www.readbyqxmd.com/read/29412474/sex-dependent-reductions-in-high-molecular-weight-adiponectin-during-acute-hyperinsulinemia-are-prevented-with-endurance-training-in-older-females
#11
Leslie A Consitt, Gunjan Saxena, Megan Schaefer
OBJECTIVE: The high molecular weight (HMW) adiponectin isoform is considered the active form of adiponectin and is linked to insulin sensitivity and the reduced risk of developing cardiovascular disease. The purpose of the first study was to determine the effects of age and sex on the plasma HMW adiponectin response to acute hyperinsulinemia, and secondly determine if either endurance or resistance exercise training could affect this response. DESIGN AND PARTICIPANTS: Twenty-six, healthy males (19-84 years) and twenty-six, healthy females (18-76 years) were recruited and matched for BMI to examine the effects of sex and age on the plasma adiponectin response to a 2 hour hyperinsulinemic-euglycemic clamp...
February 7, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29411486/severe-insulin-resistance-in-disguise-a-familial-case-of-reactive-hypoglycemia-associated-with-a-novel-heterozygous-insr-mutation
#12
Stefania Innaurato, Gemma V Brierley, Valeria Grasso, Arianna Massimi, Rossella Gaudino, Sara Sileno, Sergio Bernardini, Robert Semple, Fabrizio Barbetti
AIM: Hypoglycemia in childhood is very rare and can be caused by genetic mutations or insulin-secreting neoplasms. Postprandial hypoglycemia has previously been associated with insulin receptor (INSR) gene mutations. We aimed to identify the cause of postprandial hypoglycemia in a 10-year-old boy. SUBJECTS: We studied the symptomatic proband and his apparently asymptomatic mother and elder brother. All of them were lean. METHODS: Metabolic screening of the proband included a 5-hour oral glucose tolerance test (OGTT), angio-magnetic resonance imaging, and 18 F-dihydroxyphenylalanine positron emission tomography/computed tomography imaging of the pancreas...
February 7, 2018: Pediatric Diabetes
https://www.readbyqxmd.com/read/29408836/pathophysiological-response-to-burn-injury-in-adults
#13
Mile Stanojcic, Abdikarim Abdullahi, Sarah Rehou, Alexandra Parousis, Marc G Jeschke
OBJECTIVE: The aim of this study was to compare the hypermetabolic, and inflammatory trajectories in burned adults to gain insight into the pathophysiological alterations and outcomes after injury. SUMMARY OF BACKGROUND DATA: Burn injury leads to a complex response that is associated with hypermetabolism, morbidity, and mortality. The underlying pathophysiology and the correlations between humoral changes and organ function have not been well delineated in adult burn patients...
March 2018: Annals of Surgery
https://www.readbyqxmd.com/read/29404514/serine-threonine-protein-kinase-25-antisense-oligonucleotide-treatment-reverses-glucose-intolerance-insulin-resistance-and-nonalcoholic-fatty-liver-disease-in-mice
#14
Esther Nuñez-Durán, Mariam Aghajan, Manoj Amrutkar, Silva Sütt, Emmelie Cansby, Sheri L Booten, Andrew Watt, Marcus Ståhlman, Norbert Stefan, Hans-Ulrich Häring, Harald Staiger, Jan Borén, Hanns-Ulrich Marschall, Margit Mahlapuu
Nonalcoholic fatty liver disease (NAFLD) contributes to the pathogenesis of type 2 diabetes and cardiovascular disease, and patients with nonalcoholic steatohepatitis (NASH) are also at risk of developing cirrhosis, liver failure, and hepatocellular carcinoma. To date, no specific therapy exists for NAFLD/NASH, which has been recognized as one of the major unmet medical needs of the twenty-first century. We recently identified serine/threonine protein kinase (STK)25 as a critical regulator of energy homeostasis and NAFLD progression...
January 2018: Hepatology Communications
https://www.readbyqxmd.com/read/29404511/exenatide-induces-carcinoembryonic-antigen-related-cell-adhesion-molecule-1-expression-to-prevent-hepatic-steatosis
#15
Hilda E Ghadieh, Harrison T Muturi, Lucia Russo, Christopher C Marino, Simona S Ghanem, Saja S Khuder, Julie C Hanna, Sukanta Jash, Vishwajeet Puri, Garrett Heinrich, Cara Gatto-Weis, Kevin Y Lee, Sonia M Najjar
Exenatide, a glucagon-like peptide-1 receptor agonist, induces insulin secretion. Its role in insulin clearance has not been adequately examined. Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) promotes hepatic insulin clearance to maintain insulin sensitivity. Feeding C57BL/6J mice a high-fat diet down-regulates hepatic Ceacam1 transcription to cause hyperinsulinemia, insulin resistance, and hepatic steatosis, as in Ceacam1 null mice (Cc1-/- ). Thus, we tested whether exenatide regulates Ceacam1 expression in high-fat diet-fed mice and whether this contributes to its insulin sensitizing effect...
January 2018: Hepatology Communications
https://www.readbyqxmd.com/read/29404484/the-selective-peroxisome-proliferator-activated-receptor-delta-agonist-seladelpar-reverses-nonalcoholic-steatohepatitis-pathology-by-abrogating-lipotoxicity-in-diabetic-obese-mice
#16
Fahrettin Haczeyni, Hans Wang, Vanessa Barn, Auvro R Mridha, Matthew M Yeh, W Geoffrey Haigh, George N Ioannou, Yun-Jung Choi, Charles A McWherter, Narcissus C-H Teoh, Geoffrey C Farrell
Lipotoxicity associated with insulin resistance is central to nonalcoholic steatohepatitis (NASH) pathogenesis. To date, only weight loss fully reverses NASH pathology, but mixed peroxisome proliferator-activated receptor-alpha/delta (PPAR-α/δ) agonists show some efficacy. Seladelpar (MBX-8025), a selective PPAR-δ agonist, improves atherogenic dyslipidemia. We therefore used this agent to test whether selective PPAR-δ activation can reverse hepatic lipotoxicity and NASH in an obese, dyslipidemic, and diabetic mouse model...
September 2017: Hepatology Communications
https://www.readbyqxmd.com/read/29404215/equine-glucagon-like-peptide-1-receptor-physiology
#17
Murad H Kheder, Simon R Bailey, Kevin J Dudley, Martin N Sillence, Melody A de Laat
Background: Equine metabolic syndrome (EMS) is associated with insulin dysregulation, which often manifests as post-prandial hyperinsulinemia. Circulating concentrations of the incretin hormone, glucagon-like peptide-1 (GLP-1) correlate with an increased insulin response to carbohydrate intake in animals with EMS. However, little is known about the equine GLP-1 receptor (eGLP-1R), or whether GLP-1 concentrations can be manipulated. The objectives were to determine (1) the tissue localisation of the eGLP-1R, (2) the GLP-1 secretory capacity of equine intestine in response to glucose and (3) whether GLP-1 stimulated insulin secretion from isolated pancreatic islets can be attenuated...
2018: PeerJ
https://www.readbyqxmd.com/read/29401632/impaired-prolactin-actions-mediate-altered-offspring-metabolism-induced-by-maternal-high-fat-feeding-during-lactation
#18
Ericka A de Los Ríos, Xarubet Ruiz-Herrera, Viridiana Tinoco-Pantoja, Fernando López-Barrera, Gonzalo Martínez de la Escalera, Carmen Clapp, Yazmín Macotela
Maternal diet during lactation affects offspring metabolic health throughout life. Prolactin (PRL) is present in high quantities in maternal milk; however, the effects of milk PRL on the offspring remain poorly characterized. In this study, we evaluated whether feeding a high-fat diet (HFD) to rats during lactation alters PRL, both in the mother's serum and in milk, and whether this factor contributes to HFD-induced metabolic dysfunction in the offspring. Maternal HFD resulted in decreased PRL levels in milk (but not in serum), reduced mammary gland (MG) PRL receptor expression, and altered MG structure and function...
January 31, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29396908/mice-fed-a-high-cholesterol-diet-supplemented-with-quercetin-3-glucoside-show-attenuated-hyperlipidemia-and-hyperinsulinemia-associated-with-differential-regulation-of-pcsk9-and-ldlr-in-their-liver-and-pancreas
#19
Majambu Mbikay, Janice Mayne, Francine Sirois, Olesya Fedoryak, Angela Raymond, Jennifer Noad, Michel Chrétien
SCOPE: Hepatic LDL receptor (LDLR) and proprotein convertase subtilisin/kexin type 9 (PCSK9) regulate the clearance of plasma LDL-cholesterol (LDL-C): LDLR promotes it, and PCSK9 opposes it. These proteins also expressed in pancreatic β cells. Using cultured hepatocytes, we previously showed that the plant flavonoid quercetin-3-glucoside (Q3G) inhibited PCSK9 secretion, stimulated LDLR expression, and enhanced LDL-C uptake. Here, we examined whether Q3G supplementation could reverse the hyperlipidemia and hyperinsulinemia of mice fed a high-cholesterol diet, and how it affected hepatic and pancreatic LDLR and PCSK9 expression...
February 3, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29396368/liver-specific-rescuing-of-ceacam1-reverses-endothelial-and-cardiovascular-abnormalities-in-male-mice-with-null-deletion-of-ceacam1-gene
#20
Lucia Russo, Harrison T Muturi, Hilda E Ghadieh, Alexander M Wisniewski, Eric E Morgan, Syed S Quadri, Gavin P Landesberg, Helmy M Siragy, Guillermo Vazquez, Rosario Scalia, Rajesh Gupta, Sonia M Najjar
OBJECTIVE: Mice with global null mutation of Ceacam1 (Cc1-/-), display impairment of insulin clearance that causes hyperinsulinemia followed by insulin resistance, elevated hepatic de novo lipogenesis, and visceral obesity. In addition, they manifest abnormal vascular permeability and elevated blood pressure. Liver-specific rescuing of Ceacam1 reversed all of the metabolic abnormalities in Cc1-/-liver+ mice. The current study examined whether Cc1-/- male mice develop endothelial and cardiac dysfunction and whether this relates to the metabolic abnormalities caused by defective insulin extraction...
January 26, 2018: Molecular Metabolism
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