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endothelial function type diabetes

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https://www.readbyqxmd.com/read/27920123/selective-enhancement-of-insulin-sensitivity-in-the-endothelium-in-vivo-reveals-a-novel-proatherosclerotic-signalling-loop
#1
Hema Viswambharan, Nadira Y Yuldasheva, Anshuman Sengupta, Helen Imrie, Matthew C Gage, Natalie J Haywood, Andrew M Walker, Anna Skromna, Natalia Makova, Stacey L Galloway, Pooja Shah, Piruthivi Sukumar, Karen E Porter, Peter J Grant, Ajay M Shah, Celio X Santos, Jing Li, David J Beech, Stephen Wheatcroft, Richard M Cubbon, Mark T Kearney
RATIONALE: In the endothelium, insulin stimulates endothelial nitric oxide synthase (eNOS) to generate the anti-atherosclerotic signalling radical NO. Insulin resistant type 2 diabetes is associated with reduced NO availability and accelerated atherosclerosis. The effect of enhancing endothelial insulin sensitivity on NO availability is unclear. OBJECTIVE: To answer this question we generated a mouse with endothelial cell (EC)-specific over-expression of the human insulin receptor (hIRECO) using the Tie2 promoter-enhancer...
December 5, 2016: Circulation Research
https://www.readbyqxmd.com/read/27915979/nontraditional-cardiovascular-risk-factors-in-pediatric-type-1-diabetes
#2
Robert P Hoffman
If we are to gain a full and complete understanding of mechanisms of cardiovascular risk factors in adolescent type 1 diabetes mechanistic risk markers must be developed that predict risk accurately and which can be used as endpoints for short or intermediate term intervention studies aimed at reducing risk. A variety of biochemical and vascular markers have potential to meet these requirements. Biochemical markers include markers of inflammation, oxidation, and endothelial damage. Vascular markers include static and dynamic measures of arterial function...
December 1, 2016: Current Diabetes Reviews
https://www.readbyqxmd.com/read/27899343/long-term-high-fat-diet-induces-hippocampal-microvascular-insulin-resistance-and-cognitive-dysfunction
#3
Zhuo Fu, Jing Wu, Tanseli Nesil, Ming D Li, Kevin W Aylor, Zhenqi Liu
Insulin action on hippocampus improves cognitive function and obesity and type 2 diabetes are associated with decreased cognitive function. Cerebral microvasculature plays a critical role in maintaining cerebral vitality and function by supplying nutrients, oxygen and hormones such as insulin to cerebral parenchyma including hippocampus. In skeletal muscle insulin actively regulates microvascular opening and closure and this action is impaired in the insulin resistant states. To examine insulin's action on hippocampal microvasculature and parenchyma and the impact of diet-induced obesity we determined cognitive function, and microvascular insulin responses, parenchyma insulin responses and capillary density in the hippocampus in 2-month and 8-month rats on chow diet and 8-month rats on long-term high-fat diet (6 months)...
November 29, 2016: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27897258/lack-of-fibronectin-extra-domain-a-alternative-splicing-exacerbates-endothelial-dysfunction-in-diabetes
#4
Gianluca Gortan Cappellari, Rocco Barazzoni, Luigi Cattin, Andrés F Muro, Michela Zanetti
Glucose-induced changes of artery anatomy and function account for diabetic vascular complications, which heavily impact disease morbidity and mortality. Since fibronectin containing extra domain A (EDA + FN) is increased in diabetic vessels and participates to vascular remodeling, we wanted to elucidate whether and how EDA + FN is implicated in diabetes-induced endothelial dysfunction using isometric-tension recording in a murine model of diabetes. In thoracic aortas of EDA(-/-), EDA(+/+) (constitutively lacking and expressing EDA + FN respectively), and of wild-type mice (EDA(wt/wt)), streptozotocin (STZ)-induced diabetes impaired endothelial vasodilation to acetylcholine, irrespective of genotype...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27895384/exendin-4-induces-extracellular-superoxide-dismutase-through-histone-h3-acetylation-in-human-retinal-endothelial-cells
#5
Hiroyuki Yasuda, Atsuko Ohashi, Shohei Nishida, Tetsuro Kamiya, Tetsuya Suwa, Hirokazu Hara, Jun Takeda, Yoshinori Itoh, Tetsuo Adachi
Extracellular-superoxide dismutase (genetic name SOD3) is a secreted anti-oxidative enzyme, and its presence in vascular walls may play an important role in protecting the vascular system against oxidative stress. Oxidative stress has been implicated in the pathogenesis of diabetic retinopathy; therefore, increases in extracellular-superoxide dismutase have been suggested to inhibit the progression of diabetic retinopathy. Incretin-based drugs such as glucagon-like peptide-1 receptor agonists are used in the treatment of type 2 diabetes...
November 2016: Journal of Clinical Biochemistry and Nutrition
https://www.readbyqxmd.com/read/27884660/exenatide-improves-diastolic-function-and-attenuates-arterial-stiffness-but-does-not-alter-exercise-capacity-in-individuals-with-type-2-diabetes
#6
Rebecca L Scalzo, Kerrie L Moreau, Cemal Ozemek, Leah Herlache, Shawna McMillin, Sarah Gilligan, Amy G Huebschmann, Tim A Bauer, Jennifer Dorosz, Jane E B Reusch, Judith G Regensteiner
BACKGROUND: Exercise is recommended as a cornerstone of treatment for type 2 diabetes mellitus (T2DM), however, it is often poorly adopted by patients. Even in the absence of apparent cardiovascular disease, persons with T2DM have an impaired ability to carry out maximal and submaximal exercise and these impairments are correlated with cardiac and endothelial dysfunction. Glucagon-like pepetide-1 (GLP-1) augments endothelial and cardiac function in T2DM. We hypothesized that administration of a GLP-1 agonist (exenatide) would improve exercise capacity in T2DM...
October 7, 2016: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/27874027/circulating-long-non-coding-rnas-as-biomarkers-of-left-ventricular-diastolic-function-and-remodelling-in-patients-with-well-controlled-type-2-diabetes
#7
D de Gonzalo-Calvo, F Kenneweg, C Bang, R Toro, R W van der Meer, L J Rijzewijk, J W Smit, H J Lamb, V Llorente-Cortes, T Thum
Contractile dysfunction is underdiagnosed in early stages of diabetic cardiomyopathy. We evaluated the potential of circulating long non-coding RNAs (lncRNAs) as biomarkers of subclinical cardiac abnormalities in type 2 diabetes. Forty-eight men with well-controlled type 2 diabetes and 12 healthy age-matched volunteers were enrolled in the study. Left ventricular (LV) parameters were measured by magnetic resonance imaging. A panel of lncRNAs was quantified in serum by RT-qPCR. No differences in expression levels of lncRNAs were observed between type 2 diabetes patients and healthy volunteers...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27871219/relationship-between-endothelial-function-of-micro-and-macrocirculation-in-patients-with-peripheral-arterial-disease
#8
Pavel Poredoš, Hana Bešič, Luka Jeraj
BACKGROUND: In the pathogenesis of peripheral arterial occlusive disease (PAD), different risk factors of atherosclerosis are involved which stimulate the development of the functional and morphological deterioration of vessel walls in macro- and microcirculation. The endothelial dysfunction (ED) of macrovessels has been proven, however, data on ED in microcirculation are sparse. Therefore, we have studied the relationship between micro- and macrocirculation in PAD patients. PATIENTS AND METHODS: The study included 85 participants: 30 patients had PAD without diabetes mellitus, 30 patients had PAD and diabetes mellitus type 2, and 25 were healthy controls...
November 24, 2016: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/27868359/linagliptin-improves-endothelial-function-in-patients-with-type-2-diabetes-a-randomized-study-of-linagliptin-effectiveness-on-endothelial-function
#9
Fumika Shigiyama, Naoki Kumashiro, Masahiko Miyagi, Ryo Iga, Yuka Kobayashi, Eiichiro Kanda, Hiroshi Uchino, Takahisa Hirose
AIMS/INTRODUCTION: The present multicenter, prospective, controlled, open and randomized three-arm parallel study was designed to compare the effects of linagliptin with those of metformin on endothelial function. MATERIALS AND METHODS: Type 2 diabetes patients treated with 750 mg of metformin (hemoglobin A1c ≥6.0% and <8.0%, n = 96) were randomized to continue metformin 750 mg/day (control group, n = 29), metformin at 1,500 mg/day (metformin group, n = 26) and metformin 750 mg/day supplemented with linagliptin 5 mg/day (linagliptin add-on group, n = 29) and treated for 16 weeks...
October 19, 2016: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/27867429/correlation-between-diastolic-function-and-endothelial-function-in-patients-with-type-2-diabetes-and-hypertension
#10
Ricardo Bedirian, Mario Fritsch Neves, Wille Oigman, Ronaldo Altenburg Odebrecht Curi Gismondi, Cesar Romaro Pozzobon, Marcia Cristina Boaventura Ladeira, Marcia Bueno Castier
BACKGROUND: Endothelial dysfunction may be involved in the pathophysiology of cardiac abnormalities in patients with diabetes mellitus (DM). A correlation between endothelial dysfunction and diastolic dysfunction in patients with type 1 DM has been demonstrated, but this relationship has not been well investigated in type 2 DM. OBJECTIVE: Compare groups of patients with type 2 DM and hypertension with and without diastolic dysfunction using endothelial function indexes, and to assess whether correlations exist between the diastolic function and the endothelial function indexes...
2016: Open Cardiovascular Medicine Journal
https://www.readbyqxmd.com/read/27866791/mesenchymal-stem-cells-the-roles-and-functions-in-cutaneous-wound-healing-and-tumor-growth
#11
REVIEW
Sei-Ichiro Motegi, Osamu Ishikawa
Mesenchymal stem cells (MSCs) are bone marrow-derived non-hematopoietic progenitor cells. MSCs are able to differentiate into various types of cells, including chondrocytes, adipocytes, osteocytes, myocytes, endothelial cells, and keratinocytes. There is increasing evidence that MSCs might be located external to the vasculature, and that perivascular cells in the skin, generally called as "pericytes", might include MSCs. It has been suggested that MSCs localized around blood vessels might migrate into wounds and contribute to the restoration of injured tissues...
November 11, 2016: Journal of Dermatological Science
https://www.readbyqxmd.com/read/27859785/increased-monocyte-derived-reactive-oxygen-species-in-type-2-diabetes-role-of-endoplasmic-reticulum-stress
#12
Robert M Restaino, Shekhar H Deo, Alan R Parrish, Paul J Fadel, Jaume Padilla
Recent evidence suggests that exposure of human monocytes to glucolipotoxic media to mimic the composition of plasma of patients with type 2 diabetes (T2D) results in the induction of endoplasmic reticulum stress markers and formation of reactive oxygen species (ROS). The extent to which these findings translate to patients with T2D remains unclear. Thus, we first measured ROS (dihydroethidium fluorescence) in peripheral blood mononuclear cells (PBMCs) from whole blood of T2D patients (n = 8) and compared to age matched healthy controls (n = 8)...
November 18, 2016: Experimental Physiology
https://www.readbyqxmd.com/read/27855624/the-women-s-heart-insights-into-new-potential-targeted-therapy
#13
Daniele Gianfrilli, Ricardo Pofi, Tiziana Feola, Andrea Lenzi, Elisa Giannetta
Cardiovascular disease represents an increasing cause of death in women. The analysis of cardiovascular risk factors in women has not reached a consensus with respect to a specific and personalized treatment designed in pre-menopausal and post-menopausal phases. Clinically significant cardioprotective and antiremodeling effects were detected in animal and human study exploring chronic inhibition of Phosphodiesterase type 5 (PDE5). The relationship between heart, estrogens and PDE5 inhibitors (PDE5i) remains unclear...
November 18, 2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27852303/the-effects-of-nigella-sativa-on-thyroid-function-serum-vascular-endothelial-growth-factor-vegf-1-nesfatin-1-and-anthropometric-features-in-patients-with-hashimoto-s-thyroiditis-a-randomized-controlled-trial
#14
Mahdieh Abbasalizad Farhangi, Parvin Dehghan, Siroos Tajmiri, Mehran Mesgari Abbasi
BACKGROUND: Hashimoto's thyroiditis is an autoimmune disorder and the most common cause of hypothyroidism. The use of Nigella sativa, a potent herbal medicine, continues to increase worldwide as an alternative treatment of several chronic diseases including hyperlipidemia, hypertension and type 2 diabetes mellitus (T2DM). The aim of the current study was to evaluate the effects of Nigella sativa on thyroid function, serum Vascular Endothelial Growth Factor (VEGF) - 1, Nesfatin-1 and anthropometric features in patients with Hashimoto's thyroiditis...
November 16, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27832858/effects-of-equivalent-sympathetic-activation-during-hypoglycemia-on-endothelial-function-and-pro-atherothrombotic-balance-in-healthy-individuals-and-obese-standard-treated-type-2-diabetes
#15
Nino G Joy, Maia Mikeladze, Lisa M Younk, Donna B Tate, Stephen N Davis
OBJECTIVE: Recent studies in type 2 diabetes have reported an association between hypoglycemia and severe cardiovascular adverse events, which are relatively increased in standard versus intensively treated individuals. The aim of this study was to determine the effects of equivalent sympathetic nervous system (SNS) activity during moderate hypoglycemia on in-vivo endothelial function, pro-inflammatory, pro-atherothrombotic, and pro-coagulant responses in healthy and standard treated type 2 diabetes individuals...
December 2016: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/27829708/interleukin-22-might-act-as-a-double-edged-sword-in-type-2-diabetes-and-coronary-artery-disease
#16
Fangchen Gong, Jin Wu, Ping Zhou, Mengyao Zhang, Jingning Liu, Ying Liu, Xiang Lu, Zhengxia Liu
Type 2 diabetes mellitus (T2DM) and coronary artery disease (CAD) are both characterized by chronic low-grade inflammation. The role of Th17 and its related cytokines in T2DM and CAD is unclear. Here we investigated the serum levels of five Th17-related cytokines (IL-17, IL-22, MIP-3α, IL-9, and IL-27) in T2DM, CAD, and T2DM-CAD comorbidity patients. IL-22 was found to be elevated in all three conditions. Elevated serum IL-22 was independently associated with the incidence of T2DM and CAD. Conversely, IL-22 was found to protect endothelial cells from glucose- and lysophosphatidylcholine- (LPC-) induced injury, and IL-22R1 expression on endothelial cells was increased upon treatment with high glucose and LPC...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27819769/cardiovascular-outcome-trials-of-the-incretin-based-therapies-what-do-we-know-so-far
#17
Pablo F Mora, Eric L Johnson
OBJECTIVE: Diabetes is a well-established pro-inflammatory state with an increased risk for cardiovascular (CV) diseases. In recent years, the number of different classes of agents for the treatment of type 2 diabetes has increased substantially, and while glycemic control is the major focus of these medications, CV safety has become of interest. Two incretin based therapies are currently available, glucagonlike peptide-1 (GLP-1) receptor agonists (RAs) and dipeptidyl peptidase-4 (DPP-4) inhibitors...
November 7, 2016: Endocrine Practice
https://www.readbyqxmd.com/read/27817148/cpap-therapy-for-patients-with-sleep-apnea-and-type-2-diabetes-mellitus-improves-control-of-blood-pressure
#18
Jamie Chung Mei Lam, Agnes Yuen Kwan Lai, Terence Chi Chun Tam, Michele Mae Ann Yuen, Karen Siu Ling Lam, Mary Sau Man Ip
PURPOSE: Obstructive sleep apnea (OSA) is highly associated with type 2 diabetes mellitus (DM), and treatment of OSA may have a positive impact on cardiometabolic profile. This study investigates the effects of continuous positive airway pressure (CPAP) treatment on glycemic control and cardiometabolic parameters in patients with diabetes. METHODS: Diabetic patients, who were newly diagnosed of OSA with an apnea hypopnea index (AHI) ≥15 and HbA1c ≥7%, were randomly assigned to either CPAP treatment or no treatment (control) for 3 months...
November 5, 2016: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/27816522/soluble-cd14-inhibits-contractile-function-and-insulin-action-in-primary-adult-rat-cardiomyocytes
#19
Sabrina Overhagen, Marcel Blumensatt, Pia Fahlbusch, Daniella Herzfeld de Wiza, Heidi Müller, Bujar Maxhera, Payam Akhyari, D Margriet Ouwens
Epicardial adipose tissue (EAT) from patients with type 2 diabetes (T2D) is characterized by monocyte infiltrations and displays an elevated release of the monocyte marker soluble cluster of differentiation 14 (sCD14) versus EAT from patients without T2D. We propose that an increased abundance of sCD14 in EAT from patients with T2D may impair the function and insulin sensitivity of the adjacent cardiomyocytes. To examine this, primary adult rat cardiomyocytes were incubated with increasing concentrations of sCD14 in the presence and absence of the co-receptor lipopolysaccharide (LPS), and analyzed for effects on determinants of contractile function, activation of inflammation signalling and insulin action...
November 3, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27812790/the-role-of-sleeve-gastrectomy-in-reducing-cardiovascular-risk
#20
Tromba Luciana, Tartaglia Francesco, Carbotta Sabino, Sforza Nadia, Pelle Fabio, Colagiovanni Vanessa, Carbotta Giovanni, Cavaiola Stefania, Casella Giovanni
BACKGROUND: Obesity is an independent cardiovascular risk factor and a catalyst of other cardiovascular risk factors, such as hypertension, dyslipidemia, type 2 diabetes mellitus (DM2) and metabolic syndrome. METHODS: We analyzed cardiovascular risk in obese patients before and after sleeve gastrectomy (SG). To this end, we studied changes in body mass index (BMI), blood chemistry parameters that characterize the risk of atherosclerosis and instrumental parameters (objective markers of this risk), namely intima-media thickness (IMT) and flow-mediated dilation (FMD), the latter reflecting endothelial function...
November 4, 2016: Obesity Surgery
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