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Vascular reactivity

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https://www.readbyqxmd.com/read/28102774/interactions-between-c-reactive-protein-and-traditional-risk-factors-in-predicting-mortality-of-older-adults
#1
Henrik Rudolf, Naemi Wall, Renate Klaassen-Mielke, Ulrich Thiem, Curt Diehm, Hans-Joachim Trampisch, Dietmar Krause
BACKGROUND: Elevated levels of C-reactive protein (CRP) are known to be associated with cardiovascular (CV) morbidity and mortality in older adults, however, there seems to be heterogeneity of this association across subsets of individuals. We aim to assess the effects of interactions between CRP and one of the following traditional CV risk factors regarding all-cause mortality in unselected elderly men and women: age, sex, body mass index, diabetes, and hypertension. PATIENTS AND METHODS: Three hundred and forty-four general practitioners all over Germany enrolled 6,817 unselected participants, aged 65 years or older, and performed thorough examinations, including CRP measurement at baseline (getABI study)...
January 19, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28100685/heat-stress-induces-ferroptosis-like-cell-death-in-plants
#2
Ayelén Mariana Distéfano, María Victoria Martin, Juan Pablo Córdoba, Andrés Martín Bellido, Sebastián D'Ippólito, Silvana Lorena Colman, Débora Soto, Juan Alfredo Roldán, Carlos Guillermo Bartoli, Eduardo Julián Zabaleta, Diego Fernando Fiol, Brent R Stockwell, Scott J Dixon, Gabriela Carolina Pagnussat
In plants, regulated cell death (RCD) plays critical roles during development and is essential for plant-specific responses to abiotic and biotic stresses. Ferroptosis is an iron-dependent, oxidative, nonapoptotic form of cell death recently described in animal cells. In animal cells, this process can be triggered by depletion of glutathione (GSH) and accumulation of lipid reactive oxygen species (ROS). We investigated whether a similar process could be relevant to cell death in plants. Remarkably, heat shock (HS)-induced RCD, but not reproductive or vascular development, was found to involve a ferroptosis-like cell death process...
January 18, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28099583/swimming-training-prevents-coronary-endothelial-dysfunction-in-ovariectomized-spontaneously-hypertensive-rats
#3
E R G Claudio, S A Almeida, V Mengal, G A Brasil, C H Santuzzi, R V Tiradentes, S A Gouvea, N S Bissoli, R L Santos, G R Abreu
Estrogen deficiency and hypertension are considered major risk factors for the development of coronary heart disease. On the other hand, exercise training is considered an effective form to prevent and treat cardiovascular diseases. However, the effects of swimming training (SW) on coronary vascular reactivity in female ovariectomized hypertensive rats are not known. We aimed to evaluate the effects of SW on endothelium-dependent coronary vasodilation in ovariectomized hypertensive rats. Three-month old spontaneously hypertensive rats (SHR, n=50) were divided into four groups: sham (SH), sham plus swimming training (SSW), ovariectomized (OVX), and ovariectomized plus swimming training (OSW)...
January 16, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28098886/novel-zinc-phthalocyanine-as-a-promising-photosensitizer-for-photodynamic-treatment-of-esophageal-cancer
#4
Weronika Kuzyniak, Jacob Schmidt, Wojciech Glac, Janine Berkholz, Gustav Steinemann, Björn Hoffmann, Eugeny A Ermilov, Ayşe Gül Gürek, Vefa Ahsen, Bianca Nitzsche, Michael Höpfner
Photodynamic therapy (PDT) has gathered much attention in the field of cancer treatment and is increasingly used as an alternative solution for esophageal cancer therapy. However, there is a constant need for improving the effectiveness and tolerability of the applied photosensitizers (PS). Here, we propose tetra-triethyleneoxysulfonyl substituted zinc phthalocyanine (ZnPc) as a promising PS for photodynamic treatment of esophageal cancer. ZnPc-induced phototoxicity was studied in two human esophageal cancer cell lines: OE-33 (adenocarcinoma) and Kyse-140 (squamous cell carcinoma)...
January 17, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28098405/shielding-engineered-islets-with-mesenchymal-stem-cells-enhance-survival-under-hypoxia
#5
Bhawna Chandravanshi, Ramesh Ramchandra Bhonde
In the present study we focused on the improvisation of islet survival in hypoxia.The Islet like cell aggregates (ICAs) derived from wharton's jelly mesenchymal stem cells (WJ MSC) were cultured with and without WJ MSC for 48h in hypoxia and normoxia and tested for their direct trophic effect on β cell survival. The WJ MSCs themselves secreted insulin upon glucose challenge and expressed the pancreatic markers at both transcription and translational level (C-peptide, Insulin,Glucagon and Glut 2). Direct contact of MSCs with ICAs facilitated highest viability under hypoxia as evidenced by fluorescein diacetate/propidium iodide and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) assay...
January 18, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28098245/natural-cytotoxicity-receptor-1-in-mouse-unk-cell-maturation-and-function
#6
A M Felker, B A Croy
Early and midgestational decidua of mice genetically ablated for expression of the natural killer (NK) cell natural cytotoxicity receptor (NCR; Ncr1(Gfp/Gfp) mice) shows restricted angiogenesis and atypically small uterine (u)NK cells . We hypothesized that NCR1 inactivation disturbs maturation and angiokine production by uterine natural killer (uNK) cells. Using histological and morphometric approaches, we observed that Ncr1(Gfp/Gfp) but not control C57BL/6 (B6) implantation sites sustain immature, non-granulated uNK cells into midpregnancy...
January 18, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28096437/phase-angle-predicts-arterial-stiffness-and-vascular-calcification-in-peritoneal-dialysis-patients
#7
Margarida Sarmento-Dias, Carla Santos-Araújo, Rui Poínhos, Bruno Oliveira, Maria Sousa, Liliana S Silva, Isabel S Silva, Flora Correia, Manuel Pestana
♦ Objectives: Fluid overload (FO) is frequently present in peritoneal dialysis (PD) patients and is associated with markers of malnutrition, inflammation, and atherosclerosis/calcification (MIAC) syndrome. We examined the relationships in stable PD patients between phase angle (PhA) and the spectrum of uremic vasculopathy including vascular calcification and arterial stiffness and between PhA and changes in serum fetuin-A levels. ♦ Methods: Sixty-one stable adult PD patients were evaluated in a cross-sectional study (ST1)...
January 17, 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/28096127/formation-of-fructose-mediated-advanced-glycation-end-products-and-their-roles-in-metabolic-and-inflammatory-diseases
#8
REVIEW
Alejandro Gugliucci
Fructose is associated with the biochemical alterations that promote the development of metabolic syndrome (MetS), nonalcoholic fatty liver disease, and type 2 diabetes. Its consumption has increased in parallel with MetS. It is metabolized by the liver, where it stimulates de novo lipogenesis. The triglycerides synthesized lead to hepatic insulin resistance and dyslipidemia. Fructose-derived advanced glycation end products (AGEs) may be involved via the Maillard reaction. Fructose has not been a main focus of glycation research because of the difficulty in measuring its adducts, and, more importantly, because although it is 10 times more reactive than glucose, its plasma concentration is only 1% of that of glucose...
January 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28095104/the-relative-efficacy-of-land-based-and-water-based-exercise-training-on-macro-and-micro-vascular-functions-in-older-patients-with-type-2-diabetes
#9
Saowaluck Suntraluck, Hirofumi Tanaka, Daroonwan Suksom
Microvascular and macrovascular dysfunction plays an important role in the pathogenesis of diabetic vascular disease. Twenty-nine older patients with type 2 diabetes were randomly assigned into the land-based (LB; n=14) or water-based (WB; n=15) groups. Both groups completed supervised aerobic cycling exercises 3 times per week for 12 weeks. The WB group performed cycling exercise training in warm water (36°C) immersed to the hip level. After 12 weeks, blood glucose concentration and insulin resistance did not change but hemoglobin A1c levels decreased (P<0...
January 17, 2017: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/28093924/effects-of-an-adapted-cardiac-rehabilitation-programme-on-arterial-stiffness-in-patients-with-type-2-diabetes-without-cardiac-disease-diagnosis
#10
Anka P Brozic, Susan Marzolini, Jack M Goodman
PURPOSE: To determine the effects of a 12-week cardiac rehabilitation programme of aerobic and resistance exercise training on arterial stiffness, peak calf vasodilatory reserve, and haemostatic markers in patients with type 2 diabetes. METHODS: Observational cohort study examining effects of 12 weeks of exercise training in 23 subjects (13 men, 10 women; mean age of 56.1 ± 10.1 years) with type 2 diabetes mellitus. Subjects performed exercise training for 12 weeks [aerobic training 5 days/week, 70%-75% peak cardiovascular fitness (VO2peak) and resistance training 2-3 days/week, 60% of one repetition maximum]...
January 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28093569/translational-evaluation-of-translocator-protein-as-a-marker-of-neuroinflammation-in-schizophrenia
#11
T Notter, J M Coughlin, T Gschwind, U Weber-Stadlbauer, Y Wang, M Kassiou, A C Vernon, D Benke, M G Pomper, A Sawa, U Meyer
Positron emission tomography (PET) imaging with radiotracers that target translocator protein 18 kDa (TSPO) has become a popular approach to assess putative neuroinflammatory processes and associated microglia activation in psychotic illnesses. It remains unclear, however, whether TSPO imaging can accurately capture low-grade inflammatory processes such as those present in schizophrenia and related disorders. Therefore, we evaluated the validity of TSPO as a disease-relevant marker of inflammation using a translational approach, which combined neurodevelopmental and neurodegenerative mouse models with PET imaging in patients with recent-onset schizophrenia and matched controls...
January 17, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28093217/abnormal-cd161-immune-cells-and-ror%C3%AE-t-mediated-enhanced-il-17f-expression-in-genetic-hypertension
#12
Madhu V Singh, Michael Z Cicha, Santosh Kumar, David K Meyerholz, Kaikobad Irani, Mark W Chapleau, François M Abboud
BACKGROUND: Hypertension is considered an immunological disorder. However, the role of IL-17 family in genetic hypertension of the spontaneously hypertensive rat (SHR) has not been investigated. OBJECTIVE: We tested the hypothesis that enhanced Th17 programming and IL-17 expression in abundant CD161+ immune cells in SHR represent an abnormal proinflammatory adaptive immune response. Furthermore, we propose that this response is driven by the master regulator RORγt and a nicotinic proinflammatory innate immune response...
January 13, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28093070/clonidine-is-effective-for-the-treatment-of-primary-idiopathic-hyperhidrosis-and-hot-flushes-a-case-report
#13
Ahmed Albadrani
BACKGROUND: While primary hyperhidrosis can be seen in men, accompanying hot flushes is rarely seen in men. Primary hyperhidrosis is thought to be related to overactivity of the sympathetic nervous system while hot flushes are believed to be related to altered peripheral vascular reactivity and a narrowed thermoregulatory zone. CASE PRESENTATION: I report the case of a 29-year-old man of Arab origin who presented to a dermatology clinic with a complaint of generalized sweating, with heavier involvement of his inguinal region, axilla, and lower back...
January 17, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28091556/vegf-b-promotes-recovery-of-corneal-innervations-and-trophic-functions-in-diabetic-mice
#14
Guohu Di, Xiaowen Zhao, Xia Qi, Songmei Zhang, Lu Feng, Weiyun Shi, Qingjun Zhou
Vascular endothelial growth factor (VEGF)-B possesses the capacity of promoting injured peripheral nerve regeneration and restore their sensory and trophic functions. However, the contribution and mechanism of VEGF-B in diabetic peripheral neuropathy remains unclear. In the present study, we investigated the expression and role of VEGF-B in diabetic corneal neuropathy by using type 1 diabetic mice and cultured trigeminal ganglion (TG) neurons. Hyperglycemia attenuated the endogenous expression of VEGF-B in regenerated diabetic corneal epithelium, but not that of VEGF receptors in diabetic TG neurons and axons...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28090711/topical-application-of-nitrosonifedipine-a-novel-radical-scavenger-ameliorates-ischemic-skin-flap-necrosis-in-a-mouse-model
#15
Yutaka Fukunaga, Yuki Izawa-Ishizawa, Yuya Horinouchi, Eriko Sairyo, Yasumasa Ikeda, Keisuke Ishizawa, Koichiro Tsuchiya, Yoshiro Abe, Ichiro Hashimoto, Toshiaki Tamaki
Ischemic skin flap necrosis can occur in random pattern flaps. An excess amount of reactive oxygen species is generated and causes necrosis in the ischemic tissue. Nitrosonifedipine (NO-NIF) has been demonstrated to possess potent radical scavenging ability. However, there has been no study on the effects of NO-NIF on ischemic skin flap necrosis. Therefore, we evaluated the potential of NO-NIF in ameliorating ischemic skin flap necrosis in a mouse model. A random pattern skin flap (1.0 × 3.0 cm) was elevated on the dorsum of C57BL/6 mice...
January 16, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28089751/reduced-serum-milk-fat-globule-epidermal-growth-factor-8-mfg-e8-concentrations-are-associated-with-an-increased-risk-of-microvascular-complications-in-patients-with-type-2-diabetes
#16
Jinxing Quan, Guohua Sun, Juxiang Liu, Guanghao Xia, Lijuan Zhang, Yonghong Li, Zubang Zhou, L V Yaya, Suhong Wei, Jing Liu
BACKGROUND: The association between serum milk fat globule-epidermal growth factor 8 (MFG-E8) concentrations and vascular complications in T2DM remains unclear. METHODS: A total of 149 patients with T2DM were included. The serum concentrations of MFG-E8, glycosylated hemoglobin (HbA1c), and high-sensitivity C-reactive protein (hs-CRP) were measured. RESULTS: There was no significant difference in serum MFG-E8 concentrations between the T2DM group and the T2DM with subclinical atherosclerosis (AS) group (615...
January 12, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28089343/assessment-of-microvascular-endothelial-function-in-type-1-diabetes-using-laser-speckle-contrast-imaging
#17
Alessandra S de M Matheus, Eliete Leão Silva Clemente, Maria de Lourdes Guimarães Rodrigues, Débora Cristina Torres Valença, Marília B Gomes
OBJECTIVE: To test whether laser speckle contrast imaging (LSCI) coupled with physiological post-occlusive reactive hyperemia (PORH) and pharmacological iontophoresis of acetylcholine (ACh) as local vasodilator stimuli could distinguish between cutaneous microvascular responses of Type 1 Diabetes (T1DM)'s patients with endothelial dysfunction and that of healthy controls. METHODS: Patients with T1DM aged ≥12years completed a clinical-epidemiological questionnaire...
January 3, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28088753/mitochondrial-redox-plays-a-critical-role-in-the-paradoxical-effects-of-napdh-oxidase-derived-ros-on-coronary-endothelium
#18
Ehtesham Shafique, Anali Torina, Karla Reichert, Bonnie Colantuono, Nasifa Nur, Khawaja Zeeshan, Vani Ravichandran, Yuhong Liu, Jun Feng, Khawaja Zeeshan, Laura E Benjamin, Kaikobad Irani, Elizabeth O Harrington, Frank W Sellke, Md Ruhul Abid
AIMS: There are conflicting reports on the role of reactive oxygen species (ROS) i.e. beneficial vs. harmful, in vascular endothelium. Here, we aim to examine whether duration of exposure to ROS and/or subcellular ROS levels are responsible for the apparently paradoxical effects of oxidants on endothelium. METHODS AND RESULTS: We have recently generated binary (Tet-ON/OFF) conditional transgenic mice (Tet-Nox2:VE-Cad-tTA) that can induce 1.8 ± 0.42-fold increase in NADPH oxidase (NOX)-derived ROS specifically in vascular endothelium upon withdrawal of tetracycline from the drinking water...
January 14, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28087333/nicotinamide-nucleotide-transhydrogenase-activity-impacts-mitochondrial-redox-balance-and-the-development-of-hypertension-in-mice
#19
Igor Leskov, Amber Neville, Xinggui Shen, Sibile Pardue, Christopher G Kevil, D Neil Granger, David M Krzywanski
Oxidant stress contributes to the initiation and progression of hypertension (HTN) by enhancing endothelial dysfunction and/or causing perturbations in nitric oxide homeostasis. Differences in mitochondrial function may augment this process and provide insight into why age of onset and clinical outcomes differ among individuals from distinct ethnic groups. We have previously demonstrated that variation in normal mitochondrial function and oxidant production exists in endothelial cells from individuals of Caucasian and African-American ethnicity and that this variation contributes to endothelial dysfunction...
December 16, 2016: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28081460/blood-brain-barrier-dysfunction-induced-by-silica-nps-in%C3%A2-vitro-and-in%C3%A2-vivo-involvement-of-oxidative-stress-and-rho-kinase-jnk-signaling-pathways
#20
Xin Liu, Baiyan Sui, Jiao Sun
Silica nanoparticles (SiO2-NPs) has been extensively exploited in biomedical fields and mostly designed to enter the circulatory system, however, few studies focused on the potential adverse effects of SiO2-NPs exposure on the blood-brain barrier (BBB) that serves as a critical barrier between the central nervous system (CNS) and the peripheral circulation. This study attempts to provide an understanding of whether and how SiO2-NPs disrupts the BBB in vitro and in vivo. Through a human BBB model, we found that SiO2-NPs could induce tight junction loss and cytoskeleton arrangement, and increase inflammatory response and the release of vascular endothelial growth factor (VEGF) of brain microvessel endothelial cells (BMECs), which further activates astrocytes to amplify the generation of VEGF and increase the aquaporin-4 expression, and thus causing BBB disruption through a complex immunoregulatory loop between BMECs and astrocytes under SiO2-NPs exposure...
January 4, 2017: Biomaterials
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