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https://www.readbyqxmd.com/read/29689252/bioadhesive-chitosan-coated-cationic-nanoliposomes-with-improved-insulin-encapsulation-and-prolonged-oral-hypoglycemic-effect-in-diabetic-mice
#1
Thanaa I Shalaby, Wessam M El-Refaie
Oral administration of insulin is hampered by the lack of carriers that can efficiently achieve high encapsulation, avoid gastric degradation, overcome mucosal barriers, and prolong the hypoglycemic effect. Chitosan (CS)-coated insulin-loaded cationic liposomes have been developed and optimized for improved oral delivery. Liposomes were prepared cationic to improve insulin encapsulation. CS was selected as a mucoadhesive coat to prolong system's residence and absorption. The performance of CS-coated compared to uncoated liposomes was examined in-vitro, ex-vivo, and in-vivo in Streptozotocin-induced diabetic mice...
April 21, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29689070/fti-277-inhibits-smooth-muscle-cell-calcification-by-up-regulating-pi3k-akt-signaling-and-inhibiting-apoptosis
#2
Arvind Ponnusamy, Smeeta Sinha, Gareth D Hyde, Samantha J Borland, Rebecca F Taylor, Emma Pond, Heather J Eyre, Colette A Inkson, Andrew Gilmore, Nick Ashton, Philip A Kalra, Ann E Canfield
BACKGROUND: Vascular calcification is associated with increased cardiovascular morbidity and mortality in patients with atherosclerosis, diabetes and chronic kidney disease. However, no viable treatments for this condition have been identified. This study aimed to determine whether farnesyl transferase inhibitors (FTIs) can reduce vascular calcification and the mechanism by which this reduction occurs. RESULTS: We demonstrate that FTI-277 significantly inhibits phosphate-induced mineral deposition by vascular smooth muscle cells (VSMC) in vitro, prevents VSMC osteogenic differentiation, and increases mRNA expression of matrix Gla protein (MGP), an inhibitor of mineralization...
2018: PloS One
https://www.readbyqxmd.com/read/29685689/insulin-resistance-adipocyte-derived-exosomes-aggravate-atherosclerosis-by-increasing-vasa-vasorum-angiogenesis-in-diabetic-apoe-mice
#3
Feng Wang, Fang-Fang Chen, Yuan-Yuan Shang, Ya Li, Zhi-Hao Wang, Lu Han, Yi-Hui Li, Lei Zhang, Yun Ti, Wei Zhang, Ming Zhong
BACKGROUND: Vasa vasorum (VV) angiogenesis is increased in type 2 diabetes mellitus (T2DM) and may promote atherosclerotic plaque rupture. We sought to determine whether insulin resistance adipocyte-derived exosomes (IRADEs) played a major role in modulating VV angiogenesis and the mechanisms involved. METHODS: The characterization of IRADEs was performed by electron microscopy, NTA (Nanoparticle Tracking Analysis) and western blot. The cellular effects of IRADEs on angiogenesis were explored in human umbilical vein endothelial cells (HUVECs) and murine aortic endothelial cells (MAECs) in vitro...
April 9, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29683445/assessing-collagen-and-elastin-pressure-dependent-microarchitectures-in-live-human-resistance-arteries-by-label-free-fluorescence-microscopy
#4
Maria Bloksgaard, Bjarne Thorsted, Jonathan R Brewer, Jo G R De Mey
The pathogenic contribution of resistance artery remodeling is documented in essential hypertension, diabetes and the metabolic syndrome. Investigations and development of microstructurally motivated mathematical models for understanding the mechanical properties of human resistance arteries in health and disease have the potential to aid understanding how disease and medical treatments affect the human microcirculation. To develop these mathematical models, it is essential to decipher the relationship between the mechanical and microarchitectural properties of the microvascular wall...
April 9, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29678603/chebulagic-acid-chebulinic-acid-and-gallic-acid-the-active-principles-of-triphala-inhibit-tnf%C3%AE-induced-pro-angiogenic-and-pro-inflammatory-activities-in-retinal-capillary-endothelial-cells-by-inhibiting-p38-erk-and-nfkb-phosphorylation
#5
Sivasankar Shanmuganathan, Narayanasamy Angayarkanni
Tumor necrosis factor-α (TNFα) a pleiotropic cytokine induces pro-inflammatory and pro-angiogenic changes in conditions such as diabetic retinopathy (DR) and neovascular age related macular degeneration (NV-AMD). Hence, inhibition of TNFα mediated changes can benefit the management of DR and NV-AMD. Triphala, an ayurvedic herbal preparation is known to have immunomodulatry functions. In this study we evaluated the alcoholic extract of triphala (AlE) and its compounds Chebulagic acid (CA), Chebulinic acid (CI) and Gallic acid (GA) for their anti-TNFα activity...
April 17, 2018: Vascular Pharmacology
https://www.readbyqxmd.com/read/29676804/the-biphasic-effect-of-extracellular-glucose-concentration-on-carbachol-induced-fluid-secretion-from-mouse-submandibular-glands
#6
Momomi Terachi, Chikara Hirono, Michinori Kitagawa, Makoto Sugita
Cholinergic agonists evoke elevations of the cytoplasmic free-calcium concentration ([Ca2+ ]i ) to stimulate fluid secretion in salivary glands. Salivary flow rates are significantly reduced in diabetic patients. However, it remains elusive how salivary secretion is impaired in diabetes. Here, we used an ex vivo submandibular gland perfusion technique to characterize the dependency of salivary flow rates on extracellular glucose concentration and activities of glucose transporters expressed in the glands. The cholinergic agonist carbachol (CCh) induced sustained fluid secretion, the rates of which were modulated by the extracellular glucose concentration in a biphasic manner...
April 20, 2018: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/29676546/alginate-catechol-cross-linking-interferes-with-insulin-secretion-capacity-in-isolated-murine-islet-cells
#7
Yu Sik Kim, Seung Woo Cho, Bomin Ko, Jisoo Shin, Chul Woo Ahn
Over the past three decades, human pancreatic islet isolation and transplantation techniques have developed as a routine clinical procedure for selected patients with type 1 diabetes mellitus. However, due to the donor shortage and required chronic systemic immunosuppression, the widespread application of islet transplantation is limited. To overcome these limitations, providing a physical barrier to transplanted islet cells with encapsulating biomaterial has emerged as a promising approach to enhance engraftment and promote islet survival post-transplantation...
April 2018: Diabetes & Metabolism Journal
https://www.readbyqxmd.com/read/29674475/effect-of-sfrp5-secreted-frizzled-related-protein-5-on-the-wnt5a-wingless-type-family-member-5a-induced-endothelial-dysfunction-and-its-relevance-with-arterial-stiffness-in-human-subjects
#8
Yun Kyung Cho, Yu Mi Kang, Seung Eun Lee, Yoo La Lee, So Mi Seol, Woo Je Lee, Joong-Yeol Park, Chang Hee Jung
OBJECTIVE: SFRP5 (secreted frizzled-related protein 5) is an endogenous inhibitor of WNT5A (wingless-type family member 5a), which has been implicated in atherosclerosis. However, contradictory results have been reported about the role of SFRP5 in atherosclerosis. We aimed to investigate whether SFRP5 could restore WNT5A-induced endothelial dysfunction in vitro and ex vivo. In addition, we sought to determine whether the serum concentration of SFRP5 is associated with atherosclerosis in humans...
April 19, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29643784/clinical-efficacy-and-safety-of-the-ex-press-filtration-device-in-patients-with-advanced-neovascular-glaucoma-and-proliferative-diabetic-retinopathy
#9
Rana Hanna, Beatrice Tiosano, Shmuel Graffi, Dan Gaton
Background: The prognosis of conventional filtration surgery in eyes with neovascular glaucoma (NVG) is limited due to increased fibrovascular proliferation or bleeding. This study aims to evaluate the safety and efficacy of the EX-PRESS filtration device in the management of NVG associated with proliferative diabetic retinopathy (PDR). Methods: In this retrospective case series, we reviewed the medical records of patients diagnosed as having NVG associated with PDR who underwent EX-PRESS filtration surgery...
January 2018: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29643061/supplemental-oxygen-improves-in-vivo-mitochondrial-oxidative-phosphorylation-flux-in-sedentary-obese-adults-with-type-2-diabetes
#10
Melanie Cree-Green, Rebecca L Scalzo, Kylie Harrall, Bradley R Newcomer, Irene E Schauer, Amy G Huebschmann, Shawna McMillin, Mark S Brown, David Orlicky, Leslie Knaub, Kristen J Nadeau, P Mason Mcclatchey, Timothy A Bauer, Judith G Regensteiner, Jane E B Reusch
Type 2 diabetes is associated with impaired exercise capacity. Alterations in both muscle perfusion and mitochondrial function can contribute to exercise impairment. We hypothesized that impaired muscle mitochondrial function in type 2 diabetes is mediated, in part, by decreased tissue oxygen delivery and would improve with oxygen supplementation. Ex vivo muscle mitochondrial content and respiration assessed from biopsy samples demonstrated expected differences in obese individuals with (N=18) and without (N=17) diabetes...
April 11, 2018: Diabetes
https://www.readbyqxmd.com/read/29626150/rac1-modulates-endothelial-function-and-platelet-aggregation-in-diabetes-mellitus
#11
Gabriele Giacomo Schiattarella, Albino Carrizzo, Federica Ilardi, Antonio Damato, Mariateresa Ambrosio, Michele Madonna, Valentina Trimarco, Marina Marino, Elena De Angelis, Silvio Settembrini, Cinzia Perrino, Bruno Trimarco, Giovanni Esposito, Carmine Vecchione
BACKGROUND: Vascular complications and abnormal platelet function contribute to morbidity and mortality in diabetes mellitus. We hypothesized that the Rho-related GTPase protein, Rac1, can influence both endothelial and platelet function and might represent a potential novel therapeutic target in diabetes mellitus. METHODS AND RESULTS: We used both in vitro and ex vivo approaches to test the effects of pharmacological inhibition of Rac1 during hyperglycemic condition...
April 6, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29621668/exendin-4-relieves-the-inhibitory-effects-of-high-glucose-on-the-proliferation-and-osteoblastic-differentiation-of-periodontal-ligament-stem-cells
#12
Zijun Guo, Rui Chen, Fujun Zhang, Ming Ding, Ping Wang
BACKGROUND: With the impaired regenerative potential in patients with diabetes mellitus (DM), Periodontal ligament stem cells (PDLSCs) are regarded as an attractive source of stem cells for periodontal cytotherapy. Recent studies have shown that Exendin-4 (Ex-4) exerts cell-protective effects and bone remodeling ability on many types of cells. The aim of this study was to investigate whether Ex-4 alleviates the inhibition of high glucose on the proliferation and osteogenic differentiation of PDLSCs...
March 27, 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29614709/effects-of-resistance-exercise-on-antioxidant-enzyme-activities-and-apoptosis-related-protein-expression-of-hippocampus-in-oletf-rats
#13
Min-Ki Lee, Chun-Seop Jung, Jin-Hwan Yoon, Namju Lee
BACKGROUND: Studies on antioxidant enzyme activity and apoptosis related protein expression associated with diabetes are mainly limited to aerobic exercise. Since the effectiveness and efficiency of the resistance to diabetes has recently emerged, it is necessary to investigate the effects of regular resistance exercise on these factors. OBJECTIVE: The purpose of this study was to investigate the effects of resistance exercise on antioxidant enzymes activities and apoptosis related protein expression in hippocampus of diabetic rats...
March 23, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29609582/ex-met-study-exercise-in-prevention-on-of-metabolic-syndrome-a-randomized-multicenter-trial-rational-and-design
#14
Arnt Erik Tjønna, Joyce S Ramos, Axel Pressler, Martin Halle, Klaus Jungbluth, Erika Ermacora, Øyvind Salvesen, Jhennyfer Rodrigues, Carlos Roberto Bueno, Peter Scott Munk, Jeff Coombes, Ulrik Wisløff
BACKGROUND: Metabolic syndrome substantially increases risk of cardiovascular events. It is therefore imperative to develop or optimize ways to prevent or attenuate this condition. Exercise training has been long recognized as a corner-stone therapy for reducing individual cardiovascular risk factors constituting the metabolic syndrome. However, the optimal exercise dose and its feasibility in a real world setting has yet to be established. The primary objective of this randomized trial is to investigate the effects of different volumes of aerobic interval training (AIT) compared to the current exercise guideline of moderate-intensity continuous training (MICT) on the composite number of cardiovascular disease risk factors constituting the metabolic syndrome after a 16 week, 1-year, and 3-year follow-up...
April 2, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29608244/microrna-181a-inhibits-ocular-neovascularization-by-interfering-with-vegf-expression
#15
Chun Yang, Houda Tahiri, Chenrongrong Cai, Muqing Gu, Carmen Gagnon, Pierre Hardy
AIM: Excess angiogenesis or neovascularization plays a key role in the pathophysiology of several ocular diseases such as retinopathy of prematurity, diabetic retinopathy and exudative age-related macular degeneration. MicroRNA-181a (miR-181a) was found highly expressed in retina and choroidal tissues. This study intends to investigate the role of miR-181a in the regulation of ocular neovascularization in different pathophysiological conditions. METHOD: We performed the RNA sequence to identify the microRNAs components of anti-angiogenic lymphocyte-derived microparticles (LMPs)...
April 2, 2018: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/29603534/low-intensity-extracorporeal-shock-wave-therapy-ameliorates-diabetic-underactive-bladder-in-streptozocin-induced-diabetic-rats
#16
Hsun Shuan Wang, Byung Seok Oh, Bohan Wang, Yajun Ruan, Jun Zhou, Lia Banie, Yung Chin Lee, Arianna Tamaddon, Zhou Tie, Guifang Wang, Guiting Lin, Tom F Lue
OBJECTIVES: To evaluate the therapeutic effect of once-per-week low-intensity extracorporeal shock wave therapy (Li-ESWT) on underactive bladder (UAB) in the streptozotocin-induced diabetic rat model. MATERIALS AND METHODS: Thirty-six female Sprague-Dawley rats were assigned into 3 groups: normal control (NC), diabetes control (DMC), and diabetes underwent Li-ESWT (DM Li-ESWT). The two DM groups received intraperitoneal 60 mg/kg streptozotocin injection to induce diabetes mellitus...
March 30, 2018: BJU International
https://www.readbyqxmd.com/read/29593229/effects-of-smoking-habit-change-on-all-cause-mortality-and-cardiovascular-diseases-among-patients-with-newly-diagnosed-diabetes-in-korea
#17
Mi Hee Cho, Kiheon Lee, Sang Min Park, Jooyoung Chang, Seulggie Choi, Kyuwoong Kim, Hye-Yeon Koo, Ji-Hye Jun, Sung Min Kim
This study aimed to investigate the effects of smoking habit change on the risks of all-cause mortality and cardiovascular diseases (CVDs) among patients with newly diagnosed diabetes using the Korean National Sample Cohort data. Survival regression analyses for the risks of all-cause mortality and CVDs were performed. Quitters without body mass index (BMI) change (adjusted hazard ratio [aHR], 0.68; 95% confidence interval [CI], 0.46-1.00) and quitters with BMI loss (aHR, 1.76; 95% CI, 1.13-2.73) showed significantly reduced and substantially the increased risk of all-cause mortality, respectively, compared with sustained smokers...
March 28, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29589072/the-resident-macrophages-in-murine-pancreatic-islets-are-constantly-probing-their-local-environment-capturing-beta-cell-granules-and-blood-particles
#18
Bernd H Zinselmeyer, Anthony N Vomund, Brian T Saunders, Michael W Johnson, Javier A Carrero, Emil R Unanue
AIMS/HYPOTHESIS: We studied here the interactions between the resident macrophages of pancreatic islets with beta cells and the blood vasculature. We also examined the immunological consequences of such interactions. METHODS: Islets were isolated from C57BL/6 mice expressing CX3C motif chemokine receptor 1-green fluorescent protein (CX3CR-GFP) and examined live by two-photon microscopy. Islets were also examined by electron microscopy to study the relationship of the intra-islet macrophages with the beta cells...
March 27, 2018: Diabetologia
https://www.readbyqxmd.com/read/29580624/antidiabetic-gliptins-affect-biofilm-formation-by-streptococcus-mutans
#19
Arpan De, Arianna Pompilio, Jenifer Francis, Iain C Sutcliffe, Gary W Black, Giulio Lupidi, Dezemona Petrelli, Luca A Vitali
Streptococcus mutans, a dental caries causing odontopathogen, produces X-prolyl dipeptidyl peptidase (Sm-XPDAP, encoded by pepX), a serine protease known to have a nutritional role. Considering the potential of proteases as therapeutic targets in pathogens, this study was primarily aimed at investigating the role of Sm-XPDAP in contributing to virulence-related traits. Dipeptidyl peptidase (DPP IV), an XPDAP analogous enzyme found in mammalian tissues,is a well known therapeutic target in Type II diabetes. Based on the hypothesis that gliptins, commonly used as anti-human-DPP IV drugs, may affect bacterial growth upon inhibition of Sm-XPDAP, we have determined their ex vivo antimicrobial and anti-biofilm activity towards S...
April 2018: Microbiological Research
https://www.readbyqxmd.com/read/29574168/low-leisure-based-sitting-time-and-being-physically-active-were-associated-with-reduced-odds-of-death-and-diabetes-in-people-with-chronic-obstructive-pulmonary-disease-a-cohort-study
#20
Zoe McKeough, Sonia Wing Mei Cheng, Jennifer Alison, Christine Jenkins, Mark Hamer, Emmanuel Stamatakis
QUESTIONS: In people with chronic obstructive pulmonary disease (COPD), are activity phenotypes (based on physical activity and recreational screen time) associated with mortality and cardiometabolic risk factors? DESIGN: Cohort study. PARTICIPANTS: People with COPD aged≥40years and who were current or ex-smokers were identified from the 2003 Scottish Health Survey. OUTCOME MEASURES: Data were collected regarding demographics, anthropometric measurements, medical history, physical activity, sedentary behaviour, health outcomes, and mortality...
March 21, 2018: Journal of Physiotherapy
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