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https://www.readbyqxmd.com/read/30545741/insulin-like-growth-factor-1-activates-ampk-to-augment-mitochondrial-function-and-correct-neuronal-metabolism-in-sensory-neurons-in-type-1-diabetes
#1
Mohamad-Reza Aghanoori, Darrell R Smith, Shiva Shariati-Ievari, Andrew Ajisebutu, Annee Nguyen, Fiona Desmond, Carlos H A Jesus, Xiajun Zhou, Nigel A Calcutt, Michel Aliani, Paul Fernyhough
OBJECTIVE: Diabetic sensorimotor polyneuropathy (DSPN) affects approximately half of diabetic patients leading to significant morbidity. There is impaired neurotrophic growth factor signaling, AMP-activated protein kinase (AMPK) activity and mitochondrial function in dorsal root ganglia (DRG) of animal models of type 1 and type 2 diabetes. We hypothesized that sub-optimal insulin-like growth factor 1 (IGF-1) signaling in diabetes drives loss of AMPK activity and mitochondrial function, both contributing to development of DSPN...
November 28, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/30545352/phytochemical-analysis-and-antidiabetic-potential-of-elaeagnus-umbellata-thunb-in-streptozotocin-induced-diabetic-rats-pharmacological-and-computational-approach
#2
Nausheen Nazir, Muhammad Zahoor, Mohammad Nisar, Imran Khan, Nasiara Karim, Heba Abdel-Halim, Akhtar Ali
BACKGROUND: The fruit of Elaeagnus umbellata has high medicinal values and is an excellent source of phytochemicals. This study was aimed to evaluate the antioxidant, enzyme inhibitory and antidiabetic potential of Elaeagnus umbellata. METHODS: The antioxidant potential of the crude extract and subfractions of E. umbellata fruit were determined using DPPH (2, 20-diphenyl-1-picrylhydrazyl) and ABTS (2, 2'-azinobis-3-ethylbenzothiazoline-6-sulfonic acid) assays. The enzyme inhibitory potentials of extracts against α-amylase and α-glucosidase enzymes were also determined...
December 13, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/30545309/metformin-regulates-atrial-sk2-and-sk3-expression-through-inhibiting-the-pkc-erk-signaling-pathway-in-type-2-diabetic-rats
#3
Chang-He Liu, Na Hua, Xi Fu, Yi-Long Pan, Bin Li, Xiao-Dong Li
BACKGROUND: Our previous study showed that metformin regulates the mRNA and protein levels of type 2 small conductance calcium-activated potassium channel (SK2) and type 3 small conductance calcium-activated potassium channels (SK3) in atrial tissue as well as the ion current of atrial myocytes in rats with type 2 diabetes mellitus (T2DM), but the underlying signaling mechanism is unknown. This study aimed to investigate whether metformin regulates atrial SK2 and SK3 protein expression in T2DM rats though the protein kinase C (PKC)/extracellular signal-regulated kinase (ERK) signaling pathway...
December 13, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/30543793/endogenous-insulin-signaling-in-the-rpe-contributes-to-the-maintenance-of-rod-photoreceptor-function-in-diabetes
#4
Matthew J Tarchick, Alecia H Cutler, Timothy D Trobenter, Michael R Kozlowski, Emily R Makowski, Nicholas Holoman, Jianning Shao, Bailey Shen, Bela Anand-Apte, Ivy S Samuels
In diabetes, there are two major physiological aberrations: (i) Loss of insulin signaling due to absence of insulin (type 1 diabetes) or insulin resistance (type 2 diabetes) and (ii) increased blood glucose levels. The retina has a high proclivity to damage following diabetes, and much of the pathology seen in diabetic retinopathy has been ascribed to hyperglycemia and downstream cascades activated by increased blood glucose. However, less attention has been focused on the direct role of insulin on retinal physiology, likely due to the fact that uptake of glucose in retinal cells is not insulin-dependent...
December 10, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/30541957/protein-rich-extract-of-musca-domestica-larvae-alleviated-metabolic-disorder-in-stz-induced-type-2-diabetic-rat-model-via-hepatoprotective-and-pancreatic-%C3%AE-cell-protective-activities
#5
Hanfang Mei, Jianhua Xu, Yinru He, Xia Yang, Wenbin Liu, Wei Tian, Y U Zeng, Jiayong Zhu
The study was designed to explore the beneficial effect of Musca domestica larvae extract (MDLE) on a metabolic disorder using a diabetic rat model. Streptozotocin-induced diabetic rats were treated with or without MDLE. Blood glucose, insulin levels, lipid profiles, and oxidative stress markers were measured. The morphological changes in the pancreas and liver were determined, as well as insulin expression. The expression of glucose transporter 4 (GLUT4), phospho-adenosine monophosphate-activated protein kinase (p-AMPK)/total AMPK, superoxide dismutase 1 (SOD1), catalase (CAT), and peroxisome proliferator-activated receptor gamma (PPARγ) were detected...
December 2018: Journal of Biosciences
https://www.readbyqxmd.com/read/30541952/primary-study-on-the-hypoglycemic-mechanism-of-5rolglp-hv-in-stz-induced-type-2-diabetes-mellitus-mice
#6
Yanan Wang, Minggang Li, Zaizhong Ni
5rolGLP-HV is a promising dual-function peptide for the treatment of diabetes and thrombosis simultaneously. For investigating the therapeutic mechanism of 5rolGLP-HV for type 2 diabetes mellitus (T2DM), STZ-induced diabetic mice were established and treated with 5rolGLP-HV. The results showed that daily water and food intake, blood glucose, serum and pancreatic insulin levels significantly decreased after 5rolGLP-HV treatment with various oral concentrations, and 16 mg/kg was the optimal dose for controlling diabetes...
December 2018: Journal of Biosciences
https://www.readbyqxmd.com/read/30539783/terpenoid-rich-elettaria-cardamomum-extract-prevents-alzheimer-like-alterations-induced-in-diabetic-rats-via-inhibition-of-gsk3%C3%AE-activity-oxidative-stress-and-pro-inflammatory-cytokines
#7
Adel A Gomaa, Rania M Makboul, Mohamed A El-Mokhtar, Engy A Abdel-Rahman, Israa A Ahmed, Mariam A Nicola
PURPOSE: Recent studies suggested that the non-familiar form of Alzheimer's disease (AD) could be consequence of metabolic syndrome and neuroinflammation. Elettaria cardamomum extract (EC) has exhibited antidiabetic, antioxidant and anti-inflammatory properties. This research was conducted to evaluate the effects of EC on AD-like alterations in rats induced by high fructose and high fat diet coupled with a single small dose of STZ (25 mg/kg) (T2DM rats). METHODS: Phytochemical analysis was carried out...
January 2019: Cytokine
https://www.readbyqxmd.com/read/30539702/effect-of-flavonoid-rich-extract-of-tamarix-articulata-vahl-on-glucose-and-lipid-metabolism-in-normal-and-diabetic-rats
#8
Morad Hebi, Lhoussaine Hajji, Mohamed Eddouks
OBJECTIVE: The present study was carried out in order to evaluate the antidiabetic and antihyperlipidemic potential of flavonoid-rich extract of Tamarix articulata (FRETA) in both normal and streptozotocin (STZ)-induced diabetic rats. MATERIAL AND METHODS: Normal and diabetic rats were treated with the FRETA for 7 days. At the end of treatment, a range of parameters were tested including blood lipid profile, histopathological changes in both liver and pancreas and oral glucose tolerance test (OGTT)...
December 11, 2018: Cardiovascular & Hematological Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/30538991/improvement-of-diabetes-mellitus-symptoms-by-intake-of-ninjin-yoeito
#9
Shigekuni Hosogi, Masahiro Ohsawa, Ikuo Kato, Atsukazu Kuwahara, Toshio Inui, Akio Inui, Yoshinori Marunaka
Diabetes mellitus is a well-known common disease and one of the most serious social problems in the worldwide. Although various types of drugs are developed, the number of patients suffering from diabetes mellitus is still increasing. Ninjin'yoeito (NYT) is one of formulas used in Japanese traditional herbal medicines for improving various types of metabolic disorders. However, the effect of NYT on diabetes mellitus has not yet been investigated. In the present study, we tried to clarify the action of NYT on the serum glucose level in streptozotocin (STZ)-induced diabetic mice...
2018: Frontiers in Nutrition
https://www.readbyqxmd.com/read/30537701/in-vivo-assessment-of-combined-effects-of-glibenclamide-and-losartan-in-diabetic-rats
#10
Moureq R Alotaibi, Amal J Fatani, Ahmed T Almnaizel, Mohammed M Ahmed, Hatem M Abuohashish, Salim S Al-Rejaie
OBJECTIVE: Diabetic complications involve multiple pathological pathways, including hyperglycemia-induced oxidative stress and inflammation. Combination therapy is usually employed to improve treatment outcomes and to lower potential adverse effects. In this study, we evaluated the effects of antidiabetic and antihypertensive agents, glibenclamide (GLI) and losartan (LT), on diabetes-associated metabolic changes in rats. MATERIALS AND METHODS: Streptozotocin (STZ)-induced diabetic animals were orally treated with GLI and/or LT 5 and 25 mg/kg respectively for 4 weeks...
December 10, 2018: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/30536889/downregulation-of-long-noncoding-rna-h19-rescues-hippocampal-neurons-from-apoptosis-and-oxidative-stress-by-inhibiting-igf2-methylation-in-mice-with-streptozotocin-induced-diabetes-mellitus
#11
Jin-Lu Yu, Chao Li, Li-He Che, Yu-Hao Zhao, Yun-Bao Guo
The diabetes mellitus (DM)-induced reduction of neurogenesis in the hippocampus is consequently accompanied by cognitive decline. The present study set out to define the critical role played by long noncoding RNA H19 (lncRNA H19) in the apoptosis of hippocampal neurons, as well as oxidative stress (OS) in streptozotocin (STZ)-induced DM mice through regulation of insulin-like growth factor 2 (IGF2) methylation. The expression of lncRNA H19 in the hippocampal neurons and surviving neurons were detected. Hippocampal neurons were cultured and transfected with oe-H19, sh-H19, oe-IGF2, or sh-IGF2, followed by detection of the expressions of IGF2 and apoptosis-related genes...
December 7, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/30536833/suppression-of-tlr4-by-mir-448-is-involved-in-diabetic-development-via-regulating-macrophage-polarization
#12
Qing Zhao, Xin Wang, Qiaosheng Hu, Ridong Zhang, Yong Yin
OBJECTIVES: Lipopolysaccharide (LPS) contributed to the development and progression of type 2 diabetes mellitus (T2D), while TLR4 is reported to mediate the LPS-induced inflammation in macrophages. However, the potential molecular mechanisms for TLR4-mediated macrophages activation in T2D have not yet to be fully clarified. METHODS: Type 2 diabetes models in C57BL/6J mice were generated by a combination administration of streptozotocin (STZ) and a high-fat diet (HFD)...
December 7, 2018: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/30536192/increased-levels-of-serum-pigment-epithelium-derived-factor-aggravate-proteinuria-via-induction-of-podocyte-actin-rearrangement
#13
Na Huang, Xuan Zhang, Youzhao Jiang, Hao Mei, Ling Zhang, Qiong Zhang, Jiongyu Hu, Bing Chen
PURPOSE: To assess the role of serum pigment epithelium-derived factor (PEDF) in the occurrence and development of proteinuria and renal dysfunction and determine its relevant signaling pathway. METHODS: We analyzed serum PEDF, creatinine, the urinary albumin-to-creatinine ratio, and renal morphology of normal or streptozotocin (STZ)-induced diabetic mice, before and after treatment with PEDF. In vitro, podocytes were stimulated with PEDF under normal or high-glucose conditions; permeability was measured by the transwell assay with fluorescein isothiocyanate (FITC)-dextran; and F-actin cytoskeleton was analyzed by phalloidin staining...
December 7, 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/30532641/effect-of-treatment-with-vitamin-d-plus-calcium-on-oxidative-stress-in-streptozotocin-induced-diabetic-rats
#14
Fatema Suliman Alatawi, Uzma A Faridi, Mohsen Suliaman Alatawi
Background: In diabetes mellitus, uncontrolled hyperglycemia has been reported to induce oxidative stress, which may lead to health complications. Vitamin D, however, acts as a non-enzymatic antioxidant to protect cells against oxidative stress and damage. Objective: To investigate the antioxidative effect of vitamin D combined with calcium in streptozotocin (STZ)-induced diabetic rats. Methods: Rats were divided into four groups (ten rats in each group)...
December 2018: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/30526660/overexpression-of-apelin-in-wharton-jelly-mesenchymal-stem-cell-reverses-insulin-resistance-and-promotes-pancreatic-%C3%AE-cell-proliferation-in-type-2-diabetic-rats
#15
Lian Ru Gao, Ning Kun Zhang, Yan Zhang, Yu Chen, Li Wang, Ying Zhu, Hai Hong Tang
BACKGROUND: Apelin plays a key beneficial role in energy metabolism by increasing glucose uptake and insulin sensitivity; however, apelin has a short half-life because it is rapidly cleared from the circulation limiting its therapeutic benefit. The aim of this study is to create a new approach to treat type 2 diabetes by inducing prolonged expression of apelin in Wharton's jelly-derived mesenchymal stem cells (WJ-MSCs). METHODS: A type 2 diabetic rat model was given a high-fat diet combined with low-dose streptozotocin (STZ) injection...
December 7, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/30525056/corrigendum-to-gmelina-arborea-roxb-family-verbenaceae-extract-upregulates-the-%C3%AE-cell-regeneration-in-stz-induced-diabetic-rats
#16
Anoja Priyadarshani Attanayake, Kamani Ayoma Perera Wijewardana Jayatilaka, Chitra Pathirana, Lakmini Kumari Boralugoda Mudduwa
[This corrects the article DOI: 10.1155/2016/4513871.].
2018: Journal of Diabetes Research
https://www.readbyqxmd.com/read/30524944/transforming-growth-factor-%C3%AE-blocks-glucose-induced-inflammation-and-apoptosis-in-corneal-epithelial-cells
#17
Fengge Liu, Hui Kong, Xiangfeng Kong
Diabetic retinopathy is the most important ocular complication associated with diabetes. Corneal defects due to diabetes mellitus (DM) may cause severe vision impairments. This study aimed to identify the effect of transforming growth factor-β (TGF-β) on biological events, such as apoptosis and inflammation, in the diabetic cornea. High-glucose treatment induced reactive oxygen species (ROS) production and several biological events, including apoptosis and inflammatory cytokine secretion, in human corneal epithelial cells...
December 2018: FEBS Open Bio
https://www.readbyqxmd.com/read/30524676/differential-change-in-cortical-and-hippocampal-monoamines-and-behavioral-patterns-in-streptozotocin-induced-type-1-diabetic-rats
#18
Li-Wei Lin, Fan-Shiu Tsai, Wen-Ta Yang, Shang-Chih Lai, Chun-Chuan Shih, Sheng-Chi Lee, Chi-Rei Wu
Objectives: Diabetes mellitus (DM) is a widespread metabolic disorder worldwide. Clinical physicians have found diabetic patients have mild to middle cognitive dysfunction and an alteration of brain monoaminergic function. This study explored the change in various patterns of behavioral models and brain monoamine function under streptozotocin (STZ)-induced type 1 diabetes. Materials and Methods: We established a type 1 DM model via intravenous injection with STZ (65 mg/kg) in rats...
October 2018: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/30523230/-vascular-endothelial-growth-factor-antibody-attenuates-diabetic-peripheral-neuropathic-pain-in-rats
#19
Bingbing Pan, Huijuan Ding, Zhigang Cheng, Zongbin Song, Dan Xiao, Qulian Guo
To explore the role of vascular endothelial growth factor (VEGF) in diabetic peripheral neuropathic pain in rats.
 Methods: Twenty-four adult male Sprague-Dawley rats aged 8 weeks were randomly divided into 3 groups (n=8 per group). The control group (C group): rats were intraperitoneally injected with sodium citrate solution at 10 mL/kg; the model group (M group): rats were intraperitoneally injected with streptozotocin at 65 mg/kg; the treatment group (T group): rats received intraperitoneal injection of anti-VEGF antibody (10 mg/kg) at the 1st, 3rd, 7th, 10th day after STZ treatment...
October 28, 2018: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/30523026/foxo-transcription-factors-are-critical-regulators-of-diabetes-related-muscle-atrophy
#20
Brian T O'Neill, Gourav Bhardwaj, Christie M Penniman, Megan T Krumpoch, Pablo A Suarez Beltran, Katherine Klaus, Kennedy Poro, Mengyao Li, Hui Pan, Jonathan M Dreyfuss, K Sreekumaran Nair, C Ronald Kahn
Insulin deficiency and uncontrolled diabetes lead to a catabolic state with decreased muscle strength, contributing to disease-related morbidity. FoxO transcription factors are suppressed by insulin and thus are key mediators of insulin action. To study their role in diabetic muscle wasting, we created mice with muscle-specific triple knockout of FoxO1/3/4 and induced diabetes in these M-FoxO-TKO mice with streptozotocin (STZ). Muscle mass and myofiber area were decreased 20-30% in STZ-Diabetes mice due to increased ubiquitin-proteasome degradation and autophagy alterations, characterized by increased LC3 containing vesicles, and elevated levels of p-ULK1 and LC3-II...
December 6, 2018: Diabetes
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