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https://www.readbyqxmd.com/read/29748994/hypothalamic-arcuate-nucleus-glucokinase-regulates-insulin-secretion-and-glucose-homeostasis
#1
Yue Ma, Risheka Ratnasabapathy, Chioma Izzi-Engbeaya, Marie-Sophie Nguyen-Tu, Errol Richardson, Sufyan Hussain, Ivan De Backer, Christopher Holton, Mariana Norton, Gaelle Carrat, Blanche Schwappach, Guy A Rutter, Waljit S Dhillo, James Gardiner
AIMS: Glucokinase (GK) serves as a glucose sensor in several tissues including glucose-sensitive neurons of the arcuate nucleus within the hypothalamus. We have previously demonstrated a role for arcuate GK in the regulation of food and glucose intake. However, its role in the regulation of glucose homeostasis is less clear. We therefore sought to investigate the role of arcuate GK in the regulation of glucose homeostasis. MATERIALS AND METHODS: Recombinant adeno-associated virus expressing either GK or an antisense GK construct was used to alter GK activity specifically in the hypothalamic arcuate nucleus...
May 11, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29731442/effect-of-aerobic-exercise-combined-with-ginkgo-polysaccharide-on-weight-blood-glucose-and-glycosylated-serum-protein-in-diabetic-rats
#2
Rongkun Zhu, Jun Xie
Streptozotocin copied diabetic rats model were studied through aerobic exercise combined with ginkgo polysaccharide. Aimed to offering the updating experimental basis to prevent diabetic through aerobic exercise combined with ginkgo polysaccharide, the effect of aerobic exercise combined with ginkgo polysaccharide were discussed on the weight, blood glucose, glucosylated serum protein and the secretion ability of islet β cells, oral glucose tolerance test, islet cell pathological morophological changes and positive expression of Bax and Bcl-2...
May 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29730416/the-delayed-protective-effect-of-gk-2-%C3%B0-dipeptide-mimetic-of-nerve-growth-factor-in-a-model-of-rat-traumatic-brain-injury
#3
Elisaveta E Genrikhs, Dmitriy N Voronkov, Marina R Kapkaeva, Tatyana A Gudasheva, Yuliya A Glibka, Nickolay K Isaev, Elena V Stelmashook
The delayed protective effect of GK-2, a dipeptide mimetic of Nerve Growth Factor, was investigated on the model of focal one-sided traumatic brain injury (TBI) of the sensorimotor cortex region on the 180th day after the injury. TBI caused a reliably disruption of the functions of the limbs contralateral to injury focus. The intraperitoneal administration of GK-2 (1 mg/kg) from 1st to 4th and from 7th to 10th days after TBI reduced the impairment of the motor functions of the limbs. This therapeutic effect significant manifested itself from the 7th day and continued until the end of the experiment - on the 180th day after TBI...
May 3, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29728030/-effect-of-compatibility-of-ginkgolide-a-ginkgolide-b-and-ginkgolide-k
#4
Hong Zhang, Yan-Ping Luo, Ze-Yu Cao, Xin-Zhuang Zhang, Liang Cao, Zhen-Zhong Wang, Wei Xiao
To investigate the best active compatibility of ginkgolide A, B and K (GA,GB,GK). The effects of GA, GB, GK alone, combinations of each two of them, and combinations of these three components on platelet-activating factor (PAF)-induced platelet aggregation activity and rat cerebral ischemia reperfusion model (tMCAO) were compared in this study. Different compatibilities of GA, GB and GK could significantly reduce the maximum aggregation rate of PAF-induced platelet aggregation, and the effect was most obvious in combination of the three...
April 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29725390/effect-of-gastric-bypass-combined-with-ileal-transportation-on-type-2-diabetes-mellitus
#5
Zhaoxia Gao, Bin Wang, Xiaojun Gong, Chun Yao, Defa Ren, Liwei Shao, Yan Pang, Jinxiu Liu
Type 2 diabetes mellitus (T2DM) is a chronic progressive disease, which manifests as an endocrine disorder. Among the different methods of surgery available to treat patients with T2DM, Roux-en-Y gastric bypass (RYGBP) and ileal transposition (IT) are the most commonly performed. The aim of the present study was to investigate the effects of RYGBP combined with IT on rats with T2DM. A total of 8 healthy male rats were used as a control group and 40 GK rats were randomly divided into 5 groups: A diabetes mellitus (DM) group, a sham operative group (SO), a RYGBP group, an IT group and a RYGBP+IT group...
May 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29721762/effects-of-diet-on-bile-acid-metabolism-and-insulin-resistance-in-type-2-diabetic-rats-after-roux-en-y-gastric-bypass
#6
Cheng-Xiang Shan, Nian-Cun Qiu, Miao-E Liu, Si-Luo Zha, Xin Song, Zhi-Peng Du, Wen-Sheng Rao, Dao-Zhen Jiang, Wei Zhang, Ming Qiu
BACKGROUND: Roux-en-Y gastric bypass (RYGB) is effective for the treatment of type 2 diabetes mellitus; however, the mechanism remains unclear. METHODS: The effects of RYGB on postprandial responses to three different diets (low carbohydrate (CH)-rich diet, high CH-rich diet, and fat-rich diet) of different nutritional composition in a Goto-Kakizaki (GK) diabetic rat model were assessed by measuring glucose tolerance, insulin resistance, incretin responses, and bile acid (BA) metabolism...
May 2, 2018: Obesity Surgery
https://www.readbyqxmd.com/read/29693586/ellagic-acid-alleviates-hepatic-oxidative-stress-and-insulin-resistance-in-diabetic-female-rats
#7
Simran Alexandria Polce, Cameron Burke, Lucas Martins França, Benjamin Kramer, Antonio Marcus de Andrade Paes, Maria Alicia Carrillo-Sepulveda
Non-alcoholic fatty liver disease (NAFLD) affects more than 70% of patients with type 2 diabetes mellitus (T2DM) and has become one of the most common metabolic liver diseases worldwide. To date, treatments specifically targeting NAFLD do not exist. Oxidative stress and insulin resistance have been implicated in the pathogenesis of NAFLD in diabetes. Accordingly, the goal of this present study was to determine whether Ellagic acid (EA), a natural antioxidant polyphenol found in berries and nuts, mitigates hepatic oxidative stress and insulin resistance in T2DM rats, and thus alleviates NAFLD...
April 25, 2018: Nutrients
https://www.readbyqxmd.com/read/29670912/the-effects-of-sleeve-gastrectomy-on-glucose-metabolism-and-glucagon-like-peptide-1-in-goto-kakizaki-rats
#8
Laiyuan Li, Xiaolin Wang, Liangliang Bai, Huichuan Yu, Zenghong Huang, Anpei Huang, Yanxin Luo, Jianping Wang
Purpose: To investigate the effects of sleeve gastrectomy (SG) on glucose metabolism and changes in glucagon-like peptide 1 (GLP-1) in Goto-Kakizaki (GK) rats. Methods: GK rats were randomly assigned to one of three groups: SG, SG pair-fed plus sham surgery (PF-sham), and ad libitum-fed no surgery (control). Food intake, body weight, blood glucose, GLP-1 and insulin levels, and GLP-1 expression in the jejunum and ileum were compared. Results: The SG rats exhibited lower postoperative food intake, body weight, and fasting glucose than did the control rats ( P < 0...
2018: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29610554/hypoglycemic-property-of-soy-isoflavones-from-hypocotyl-in-goto-kakizaki-diabetic-rats
#9
Ming Jin, Ming-Hua Shen, Mei-Hua Jin, Ai-Hua Jin, Xue-Zhe Yin, Ji-Shu Quan
The present study was carried out to investigate the hypoglycemic effect of soy isoflavones from hypocotyl in GK diabetic rats. A single administration and long-term administration tests were conducted in GK diabetic rats to test the hypoglycemic effect of soy isoflavones. At the end of long-term administration trial, blood protein, cholesterol, triglyceride, glycosylated serum protein, C-reactive protein, insulin, aminotransferase, lipid peroxide, interleukin-6, tumor necrosis factor-α were estimated. Inhibition of soy isoflavones against α-amylase and α-glucosidase, as well as on glucose uptake into brush border membrane vesicles or Caco-2 cells were determined in vitro ...
March 2018: Journal of Clinical Biochemistry and Nutrition
https://www.readbyqxmd.com/read/29593555/ileal-transposition-surgery-decreases-fat-mass-and-improves-glucose-metabolism-in-diabetic-gk-rats-possible-involvement-of-fgf21
#10
Kemin Yan, Weijie Chen, Huijuan Zhu, Guole Lin, Hui Pan, Naishi Li, Linjie Wang, Hongbo Yang, Meijuan Liu, Fengying Gong
Objective: Ileal transposition (IT) surgery has been reported to improve glucose and lipid metabolism, and fibroblast growth factor 21 (FGF21) is a powerful metabolic regulator. In the present study, we aimed to investigate the effects of IT surgery on metabolism and its possible relationship with the FGF21 signaling pathway in diabetic Goto-Kakizaki (GK) rats. Methods: Ten-week-old male GK rats were subjected to IT surgery with translocation of a 10 cm ileal segment to the proximal jejunum (IT group) or sham surgery without the ileum transposition (Sham-IT group)...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29552086/effect-of-qufengtongluo-decoction-on-pi3k-akt-signaling-pathway-in-the-kidney-of-type-2-diabetes-mellitus-rat-gk-rat-with-diabetic-nephropathy
#11
Wei-Jun Huang, Qiang Fu, Yong-Hua Xiao, Qing Gong, Wen-Jing Wu, Zi-Long Shen, Hua Zhang, Xu Jia, Xue-Min Huang, Ya-Xin Zhang, Jin-Xi Zhao, Shi-Dong Wang, Mian Jia, Yu-Ting Zhang
Qufengtongluo (QFTL) decoction is an effective treatment for diabetic nephropathy (DN). However, the underlying molecular mechanism is still unclear. In this study, we try to investigate whether QFTL decoction acts via inhibiting PI3K/Akt signaling pathway. Twenty-four GK rats were randomly divided into 3 groups: blank group, sham-operated group, and QFTL group. After model establishment, rats in QFTL group were given QFTL decoction by gavage, while the rest were given pure water. During the 8-week intervention, 24 hr urinal protein was measured every 2-3 weeks...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29532765/starch-synthase-iiia-and-starch-branching-enzyme-iib-deficient-mutant-rice-line-ameliorates-pancreatic-insulin-secretion-in-rats-screening-and-evaluating-mutant-rice-lines-with-antidiabetic-functionalities
#12
Yasutake Tanaka, Kiyomi Takahashi, Jun-Ichi Kato, Ai Sawazaki, Taiki Akasaka, Naoko Fujita, Toshihide Kumamaru, Yuhi Saito, Bungo Shirouchi, Masao Sato
Diabetes mellitus is a metabolic disease spreading worldwide that has been reported to worsen the development and progression of other diseases (cancer, vascular diseases and dementia). To establish functional rice lines with anti-postprandial hyperglycaemic effects, we developed mutant rice lines, which lack one or two gene(s) related to starch synthesis, and evaluated their effects. Powder of mutant rice lines or other grains was loaded to rats fasted overnight (oral grain powder loading test). Incremental area under time-concentration curves (iAUC) were calculated with monitored blood glucose levels...
May 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29525472/weaning-stage-hyperglycemia-induces-glucose-insensitivity-in-arcuate-pomc-neurons-and-hyperphagia-in-type-2-diabetic-gk-rats
#13
A Ando, D Gantulga, M Nakata, F Maekawa, K Dezaki, S Ishibashi, T Yada
Hyperphagia triggers and accelerates diabetes, and prevents proper dietary control of glycemia. Inversely, the impact of hyperglycemia on hyperphagia and possible mechanistic cause common for these two metabolic disorders in type 2 diabetes are less defined. The present study examined the precise developmental process of hyperglycemia and hyperphagia and explored the alterations in the hypothalamic arcuate nucleus (ARC), the primary feeding and metabolic center, in Goto-Kakizaki (GK) rats with type 2 diabetes and nearly normal body weight...
April 2018: Neuropeptides
https://www.readbyqxmd.com/read/29493138/-effects-of-ginkgolide-k-on-platelet-aggregation-activity-and-neuroprotection
#14
Xiao-Qian Tao, Ze-Yu Cao, Liang Cao, Wei Xiao
To investigate the antagonism effects of different concentrations of ginkgolide K(GK) on platelet activating factor (PAF)-induced platelet aggregation and neuroprotective effect on cells and animal models of ischemia-reperfusion injury. GK-containing serum in rabbit was prepared, and the effects of GK-containing serum on PAF-induced platelet aggregation was observed by platelet aggregation assay. The effect of different concentrations of GK on apoptosis of SH-SY5Y cells injured by oxygen-glucose deprivation/reoxygenation (OGD/R) was investigated by Hoechst 33342/PI double staining in OGD/R cell model...
December 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29491272/oral-glucose-tolerance-and-tryptophan-metabolism-in-non-obese-and-non-insulin-dependent-diabetic-goto-kakizaki-rats-fed-high-tryptophan-diets
#15
Eri Imai, Katsumi Shibata
We investigated oral glucose tolerance and tryptophan (Trp) metabolism in non-obese and non-insulin-dependent diabetic Goto-Kakizaki (GK) rats fed high-Trp diets. Five-week-old male Wistar and GK rats were fed a 20% casein diet (control diet) or the same diet supplemented with 1%, 2%, 3%, or 5% Trp for 58 d. Oral glucose tolerance tests were performed on Days 14 and 28 of the experimental period. Urine as well as livers and blood were collected on the last day of the experiment. The glucose concentration and the amount of Trp metabolites were measured...
2018: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/29477872/microrna-216b-actively-modulates-diabetic-angiopathy-through-inverse-regulation-on-fzd5
#16
Yuxiang Dai, Hao Lu, Shen Wang, Shufu Chang, Chenguang Li, Zheyong Huang, Feng Zhang, Hongbo Yang, Yi Shen, Zhangwei Chen, Juying Qian, Junbo Ge
BACKGROUND: In this work, we examined the angiogenic function of microRNA-216b in an in vitro rat diabetic model of myocardial microvascular endothelial cells (MMECs). METHODS: MMECs were extracted from Wistar rats (MMEC(WI)) or diabetic Goto-Kakizaki (GK) rats (MMEC(GK)) and cultured in vitro. QRT-PCR was applied to compare miR-216b between MMEC(WI) and MMEC(GK). MiR-216b was downregulated in MMEC(GK). Its effects on angiogenic development, including invasion and proliferation, were evaluated...
June 5, 2018: Gene
https://www.readbyqxmd.com/read/29444446/pathophysiological-changes-after-lipopolysaccharide-induced-acute-inflammation-in-a-type-2-diabetic-rat-model-versus-normal-controls
#17
Tingting Han, Xingxing Ren, Dongdong Jiang, Shuang Zheng, Yawen Chen, Huiying Qiu, Peter C Hou, Wei Liu, Yaomin Hu
AIMS: The present study aimed to explore the mechanism of a potential beneficial effect of pre-existing diabetes in acute hyperglycemia during critical illness. METHODS: Pathophysiological changes including blood glucose variability, changes of inflammatory and oxidative stress responses after lipopolysaccharide (LPS)-induced acute infection were compared between type 2 diabetic rat model (GK rats) and normal controls (Wistar rats). RESULTS: After LPS injection, Wistar rats showed serious infective symptoms while GK rats did not...
April 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29384667/effects-of-simulated-smog-atmospheres-in-rodent-models-of-metabolic-and-immunologic-dysfunction
#18
Marie McGee Hargrove, Samantha J Snow, Robert W Luebke, Charles E Wood, Jonathan D Krug, Q Todd Krantz, Charly King, Carey B Copeland, Shaun D McCullough, Kymberly M Gowdy, Urmila P Kodavanti, M Ian Gilmour, Stephen H Gavett
Air pollution is a diverse and dynamic mixture of gaseous and particulate matter, limiting our understanding of associated adverse health outcomes. The biological effects of two simulated smog atmospheres (SA) with different compositions but similar air quality health indexes were compared in a nonobese diabetic rat model (Goto-Kakizaki, GK) and three mouse immune models (house dust mite (HDM) allergy, antibody response to heat-killed pneumococcus, and resistance to influenza A infection). In GK rats, both SA-PM (high particulate matter) and SA-O3 (high ozone) decreased cholesterol levels immediately after a 4-h exposure, whereas only SA-O3 increased airflow limitation...
March 6, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29363193/cell-shortening-and-calcium-dynamics-in-epicardial-and-endocardial-myocytes-from-the-left-ventricle-of-goto-kakizaki-type-2-diabetic-rats
#19
Manal Smail, Lina Al Kury, Muhammad Anwar Qureshi, Anatoliy Shmygol, Murat Oz, Jaipaul Singh, Frank Christopher Howarth
NEW FINDINGS: What is the central question of this study? To investigate haemodynamic dysfunction in the type 2 diabetic Goto-Kakizaki (GK) rat, we measured shortening and Ca2+ transport in ventricular myocytes from epicardial (EPI) and endocardial (ENDO) regions. What is the main finding and its importance? EPI and ENDO GK myocytes displayed similar hypertrophy. Time to peak (TPK) and time to half (THALF) relaxation were prolonged in EPI GK myocytes. TPK Ca2+ transient was prolonged and THALF decay of the Ca2+ transient was shortened in EPI GK myocytes...
April 1, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29342984/amaranthus-caudatus-stimulates-insulin-secretion-in-goto-kakizaki-rats-a-model-of-diabetes-mellitus-type-2
#20
Silvia Zambrana, Lena C E Lundqvist, Virginia Veliz, Sergiu-Bogdan Catrina, Eduardo Gonzales, Claes-Göran Östenson
Diabetes Mellitus Type 2 prevalence is increasing worldwide; thus efforts to develop novel therapeutic strategies are required. Amaranthus caudatus (AC) is a pseudo-cereal with reported anti-diabetic effects that is usually consumed in food preparations in Bolivia. This study evaluated the anti-diabetic nutraceutical property of an AC hydroethanolic extract that contains mainly sugars and traces of polyphenols and amino acids (as shown by nalysis with liquid chromatography-mass spectrometry (LC-MS) and nuclear magnetic resonance (NMR)), in type 2 diabetic Goto-Kakizaki (GK) rats and healthy Wistar (W) rats...
January 15, 2018: Nutrients
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