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Blood glucose regulation

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https://www.readbyqxmd.com/read/29333728/population-correlations-do-not-support-the-existence-of-set-points-for-blood-levels-of-calcium-or-glucose-a-new-model-for-homeostasis
#1
Stephen P Fitzgerald, Nigel G Bean
The prevailing teaching regarding homeostasis, and in particular endocrine homeostasis, includes the fundamental concept of a "set point," which represents a target or optimum level defended by physiological control mechanisms. Analogies for the description and teaching of this concept have included thermostats and cruise controls. We previously demonstrated that such a set-point model of regulation implies that in population data of parameter set point/controlling hormone levels, correlations between the parameter and its controlling hormone must be in the direction of the response of the parameter to its controlling hormone, and that in thyroid homeostasis this relationship is not observed...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29331760/inotodiol-suppresses-proliferation-of-breast-cancer-in-rat-model-of-type-2-diabetes-mellitus-via-downregulation-of-%C3%AE-catenin-signaling
#2
Xia Zhang, Cuiyu Bao, Jingping Zhang
Breast cancer is amongst the most common cancers causing death of women worldwide. Breast cancer occurrence is more prominent in people with diabetes. A recent trend is management of diabetes and cancer has evolved to be natural remedy including single molecule therapy or combination. In this study, we investigated the effect of inotodiol on breast cancer growth in diabetic conditions. Inotodiol is a lanostane triterpenoid found in natural resources like edible mushroom Inonotus obliquus. We established a rat model of diabetic-breast cancer by treating female Sprague-Dawley rats with streptazotocin (STZ) at 35 mg/kg followed by induction of breast cancer by administration of 7,12-dimethylbenz(a)anthracene (DMBA) at 10 mg/kg...
January 10, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29329976/therapeutic-potential-of-spinal-glp-1-receptor-signaling
#3
REVIEW
Dongao Zhang, Gang Lv
GLP-1 signaling pathway has been well studied for its role in regulating glucose homeostasis, as well as its beneficial effects in energy and nutrient metabolism. A number of drugs based on GLP-1 have been used to treat type 2 diabetes mellitus. GLP-1R is expressed in multiple organs and numerous experimental studies have demonstrated that GLP-1 signaling pathway exhibits pro-survival functions in various disorders. In the central nervous system, stimulation of GLP-1R produces neuroprotective effects in specific neurodegenerative disorders, such as Alzheimer's disease and Parkinson's disease...
January 9, 2018: Peptides
https://www.readbyqxmd.com/read/29329320/atypical-e2f-functions-are-critical-for-pancreas-polyploidization
#4
Ramadhan B Matondo, Eva Moreno, Mathilda J M Toussaint, Peter C J Tooten, Saskia C van Essen, Elsbeth A van Liere, Sameh A Youssef, Laura Bongiovanni, Alain de Bruin
The presence of polyploid cells in the endocrine and exocrine pancreas has been reported for four decades. In rodents, pancreatic polyploidization is initiated after weaning and the number of polyploid cells increases with age. Surprisingly the molecular regulators and biological functions of polyploidization in the pancreas are still unknown. We discovered that atypical E2f activity is essential for polyploidization in the pancreas, using an inducible Cre/LoxP approach in new-born mice to delete ubiquitously the atypical E2f transcription factors, E2f7 and E2f8...
2018: PloS One
https://www.readbyqxmd.com/read/29328039/influence-of-metabolic-syndrome-on-condition-of-microcirculatory-bed-of-oral-cavity
#5
O Denga, T Pyndus, V Gargin, S Schneider
Metabolic syndrome (MS) can be characterized as the clustering of combination of impaired glucose regulation, metabolic disorders accompanied by abdominal obesity, hyperglycemia, high blood pressure and dyslipidemia. Detection of changes in microcirculatory bed (MCB) of oral cavity in metabolic syndrome could be important for completion of gap for developing of adequate therapeutical measure for prevention of pathological periodontal disorder that was the purpose of our study. We performed experimental investigation with modulation of MS (on white male rats 1...
December 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29325370/-association-between-carotid-artery-plaques-and-all-cause-mortality-and-cardiovascular-events
#6
W Li, F Ma, Y M Jiang, J J Li, L Song, S H Chen, X M Liu, X Q Li, S L Wu
Objective: To observe the association of carotid artery plaque with all-cause mortality and cardiovascular events. Methods: A total of 7 017 participants who completed the carotid sonography examination between 2010 and 2011 were selected from the stroke and the elderly prospective cohort Kailuan study. The participants of stroke cohort received health examination between 2006 and 2007, and participants of elderly cohort received health examination between 2010 and 2011. All participants were divided into plaque group (3 285 cases) and without plaque group (3 732 cases) according to with or without carotid artery plaque...
December 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29325290/-effect-of-hepatitis-c-virus-nonstructural-protein-5a-and-its-domains-ii-on-hepatocyte-gluconeogenesis-in-mice
#7
J J Zhang, Q Liu, L Qiao
Objective: To investigate the role of hepatitis C virus nonstructural protein 5A (NS5A) and its domains I, II, and III in regulating gluconeogenesis in mice and the underlying mechanism. Methods: A total of 60 male C57BL/6J mice were randomly divided into six groups. Recombinant lentiviral particles with specific expression of full-length NS5A, NS5A domain I, NS5A domain II, or NS5A domain III were injected via the caudal vein to establish a mouse model, and the group without injection and the group with the injection of the lentiviral particles containing enhanced green fluorescent protein (EGFP) were established as negative control...
December 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29322001/evaluation-of-the-antidiabetic-property-of-aqueous-leaves-extract-of%C3%A2-zanthoxylum-armatum-dc-using-in%C3%A2-vivo-and-in%C3%A2-vitro-approaches
#8
Carey Vana Rynjah, Ningthoujam Neelima Devi, Nasheman Khongthaw, Donkupar Syiem, Suktilang Majaw
The present study was designed to evaluate the antidiabetic potential of the aqueous leaves extract of Zanthoxylum armatum DC. leaves using in vivo and in vitro approaches. For in vivo studies, blood glucose level was monitored at different intervals after administration of varying doses of the extract for its hypoglycemic (100-6000 mg/kg b.w.) and antihyperglycemic (250 mg/kg b.w.) effect in normoglycemic and diabetic mice. In vitro enzymatic inhibition activity was tested against α-amylase, α- and β-glucosidase and lipase...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29321988/hypolipidemic-effects-of-s-linalool-and-essential-oil-from-cinnamomum-osmophloeum-ct-linalool-leaves-in-mice
#9
Bing-Ho Cheng, Lee-Yan Sheen, Shang-Tzen Chang
Cinnamomum osmophloeum ( tǔ ròu guì) ct. linalool is one of the chemotypes of the indigenous cinnamon in Taiwan. S-(+)-linalool is the major constituent of leaf essential oil (LEO) of C. osmophloeum ct. linalool. This study aimed to investigate its physiological effects including body weight changes, blood biochemical values, and histopathological changes in mice. The mice were treated with LEO, S-(+)-linalool, and R-(-)-linalool. Results demonstrated similar physiological changes in mice treated with LEO and S-(+)-linalool, but significantly different effects in the body weight, TG, TC and blood glucose of R-(-)-linalool group...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29321388/suppression-of-abdominal-aortic-aneurysm-formation-in-mice-by-teneligliptin-a-dipeptidyl-peptidase-4-inhibitor
#10
Yusuke Takahara, Tomotake Tokunou, Toshihiro Ichiki
AIM: Dipeptidyl peptidase-4 (DPP-4) inhibitors lower blood glucose levels through inhibition of incretin degradation, which stimulates insulin secretion. Recent studies reported that DPP-4 inhibitors suppressed atherogenesis in apolipoprotein E-knockout (ApoEKO) mice. In this study, we investigated whether teneligliptin, a DPP-4 inhibitor, affects the development of abdominal aortic aneurysms (AAA) in ApoEKO mice. METHODS: ApoEKO mice were fed a high-fat diet (HFD) and infused with angiotensin (Ang) II by osmotic mini pumps for 4 weeks to induce AAA with (DPP-4i group) or without (control group) teneligliptin administered orally from 1 week before HFD and Ang II infusion to the end of the experiment...
January 10, 2018: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/29321378/glutamine-derived-2-hydroxyglutarate-is-associated-with-disease-progression-in-plasma-cell-malignancies
#11
Wilson I Gonsalves, Vijay Ramakrishnan, Taro Hitosugi, Toshi Ghosh, Dragan Jevremovic, Tumpa Dutta, Dhananjay Sakrikar, Xuan-Mai Petterson, Linda Wellik, Shaji K Kumar, K Sreekumaran Nair
The production of the oncometabolite 2-hydroxyglutarate (2-HG) has been associated with c-MYC overexpression. c-MYC also regulates glutamine metabolism and drives progression of asymptomatic precursor plasma cell (PC) malignancies to symptomatic multiple myeloma (MM). However, the presence of 2-HG and its clinical significance in PC malignancies is unknown. By performing 13C stable isotope resolved metabolomics (SIRM) using U[13C6]Glucose and U[13C5]Glutamine in human myeloma cell lines (HMCLs), we show that 2-HG is produced in clonal PCs and is derived predominantly from glutamine anaplerosis into the TCA cycle...
January 11, 2018: JCI Insight
https://www.readbyqxmd.com/read/29320716/distinct-roles-of-systemic-and-local-actions-of-insulin-on-pancreatic-%C3%AE-cells
#12
Takumi Kitamoto, Kenichi Sakurai, Eun Young Lee, Koutaro Yokote, Domenico Accili, Takashi Miki
OBJECTIVE: Pancreatic β-cell mass and function are critical in glucose homeostasis. Their regulatory mechanisms have been studied principally under experimental conditions of reduced β-cell numbers, such as β-cell ablation and partial pancreatectomy. In the present study, we generated an opposite mouse model with an excessive amount of ectopic β-cells, and analyzed its consequence on β-cell mass and survival. METHODS: Mice underwent sub-renal transplantation (SRT) of pseudo-islets generated from a pancreatic β-cell line MIN6 or intra-pancreatic transplantation (IPT) of MIN6 cells, and morphological and functional changes of their endocrine pancreata were analyzed...
January 7, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29318852/-effects-of-electroacupuncture-on-ultrastructure-of-interstitial-cells-of-cajal-and-stem-cell-factor-kit-signal-pathway-of-gastric-antrum-in-diabetic-gastroparesis-rats
#13
Cheng-Cheng Zhang, Ya-Ping Lin, Yan Peng, Zeng-Hui Yue, Hai-Jiao Chen, Jian-Wen Yang, Wei-Wei Liu, Li Liu
OBJECTIVE: To observe the effects of electroacupuncture (EA) on gastrointestinal motility and the ultrastructure of interstitial cells of Cajal (ICC) and the expressions of c-kit receptor protein and stem cell factor (SCF) mRNA in diabetic gastroparesis (DGP) rats, so as to explore its mechanism. METHODS: Fifty SD rats were randomly divided into normal, model, acupoint, non-acupoint and metoclopramide groups (n=10 rats/group). DGP model was established by intraperitoneal injection of streptozotocin (STZ, 2%), and raised with high-sugar high-fat diet irregularly...
December 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29318456/voltage-dependence-of-the-ca2-transient-in-endocardial-and-epicardial-myocytes-from-the-left-ventricle-of-goto-kakizaki-type-2-diabetic-rats
#14
Lina Al Kury, Vadym Sydorenko, Manal M A Smail, Muhammad Anwar Qureshi, Anatoliy Shmygol, Murat Oz, Jaipaul Singh, Frank Christopher Howarth
Diabetes mellitus is a major global health disorder and, currently, over 450 million people have diabetes with 90% suffering from type 2 diabetes. Left untreated, diabetes may lead to cardiovascular diseases which are a leading cause of death in diabetic patients. Calcium is the trigger and regulator of cardiac muscle contraction and derangement in cellular Ca2+ homeostasis, which can result in heart failure and sudden cardiac death. It is of paramount importance to investigate the regional involvement of Ca2+ in diabetes-induced cardiomyopathy...
January 9, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29317958/relationship-between-angiopoietin-like-protein-8-and-fasting-serum-triglyceride-level
#15
Hodaka Yamada, Ikuyo Kusaka, Rika Saikawa, Kazuo Hara, Masafumi Kakei, San-E Ishikawa
Background: The aim of the study was to evaluate the correlation between angiopoietin-like protein 8 (ANGPTL8) and metabolic parameters in non-diabetic healthy humans. Methods: We enrolled 30 healthy Japanese adults (25 men and five women). After 9 h of fasting, we collected blood samples and analyzed the ANGPTL8, lipoprotein lipase (LPL), plasma lipid and glucose metabolic parameters. In addition, we performed 75-g oral glucose tolerance test (OGTT) and measured adipokines (tumor necrosis factor-α, leptin and adiponectin)...
February 2018: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29317203/alpha-mangostin-attenuates-diabetic-nephropathy-in-association-with-suppression-of-acid-sphingomyelianse-and-endoplasmic-reticulum-stress
#16
Tingting Liu, Wang Duan, Paul Nizigiyimana, Lin Gao, Zhouning Liao, Boya Xu, Lerong Liu, Minxiang Lei
AIMS: Diabetic nephropathy is a common complication of diabetes, but there are currently few treatment options. The aim of this study was to gain insight into the effect of alpha-mangostin on diabetic nephropathy and possible related mechanisms. METHODS: Goto-Kakizaki rats were used as a diabetic model and received alpha-mangostin or desipramine treatment with normal saline as a control. Ten age-matched Sprague Dawley rats were used as normal controls and treated with normal saline...
January 6, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29316644/gelidium-elegans-extract-ameliorates-type-2-diabetes-via-regulation-of-mapk-and-pi3k-akt-signaling
#17
Jia Choi, Kui-Jin Kim, Eun-Jeong Koh, Boo-Yong Lee
Gelidium elegans, a red alga native to the Asia Pacific region, contains biologically active polyphenols. We conducted a molecular biological study of the anti-diabetic effect of Gelidium elegans extract (GEE) in C57BL/KsJ-db/db mice. Mice that had been administered GEE had significantly lower body mass, water consumption, and fasting blood glucose than db/db controls. Moreover, hemoglobin A1c (HbA1c), an indicator of the glycemic status of people with diabetes, was significantly lower in mice that had been administered GEE...
January 6, 2018: Nutrients
https://www.readbyqxmd.com/read/29314731/regulation-of-amino-acid-metabolism-and-alpha-cell-proliferation-by-glucagon
#18
REVIEW
Yoshitaka Hayashi, Yusuke Seino
Both glucagon and GLP-1 are produced from proglucagon through proteolytic cleavage. Blocking glucagon action increases the circulating levels of glucagon and GLP-1, reduces the blood glucose level and induces the proliferation of islet alpha cells. Glucagon blockade also suppresses hepatic amino acid catabolism and increases the serum amino acid level. In animal models defective in both glucagon and GLP-1, the blood glucose level is not reduced, indicating that GLP-1 is required for glucagon blockade to reduce the blood glucose level...
January 3, 2018: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/29313093/baseline-glucose-level-is-an-individual-trait-that-is-negatively-associated-with-lifespan-and-increases-due-to-adverse-environmental-conditions-during-development-and-adulthood
#19
Bibiana Montoya, Michael Briga, Blanca Jimeno, Sander Moonen, Simon Verhulst
High baseline glucose levels are associated with pathologies and shorter lifespan in humans, but little is known about causes and consequences of individual variation in glucose levels in other species. We tested to what extent baseline blood glucose level is a repeatable trait in adult zebra finches, and whether glucose levels were associated with age, manipulated environmental conditions during development (rearing brood size) and adulthood (foraging cost), and lifespan. We found that: (1) repeatability of glucose levels was 30%, both within and between years...
January 9, 2018: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/29309743/population-based-and-animal-study-on-the-effects-of-schistosoma-japonicum-infection-in-the-regulation-of-host-glucose-homeostasis
#20
Qiong Duan, Lu Xiong, Chaonan Liao, Zhenzhen Liu, Yi Xiao, Ruixue Huang, Ting Tan, Yanhao Ouyang, Jinxing Cai, Meifang Xiao, Huilan Xu, Zihua Chen, Lizhang Chen, Tianlun Yang, He Huang
Although parasitic infection affects the glucose homeostasis of mice, only few studies have integrated epidemiological and animal data to determine the effect of Schistosoma japonicum infection on mice metabolism. The current study assessed the effects of S. japonicum infection on blood glucose and other metabolic parameters in both patients and animal models of chronic schistomiasis. A total of 2,183 patients with chronic schistosomiasis and age- and gender-matched individuals without schistosomiasis (n = 1,798) were enrolled in this study...
January 5, 2018: Acta Tropica
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