Search results for "Globin"
showing 10 items of 734 documents
Comparison of neutron and X-ray scattering of dilute myoglobin solutions.
1975
Experimental results obtained by neutron scattering of dilute solutions of myoglobin are compared with those obtained by X-ray scattering. X-ray scattering remains the more powerful technique at wider angles above 0.3 A−1, where neutron experiments are less accurate because of low coherent scattering probability and high incoherent background. Neutron scattering is preferable at momentum transfers below 0.2 A−1; the conditions for applying the contrast variation method for the evaluation of the three basic scattering functions, which are due to shape and internal structure, equation (3), are ideally fulfilled in this region. Furthermore, neutrons allow observation of the hydrogen-deuterium …
Androglobin: a chimeric globin in metazoans that is preferentially expressed in mammalian testes
2012
Abstract: Comparative genomic studies have led to the recent identification of several novel globin types in the Metazoa. They have revealed a surprising evolutionary diversity of functions beyond the familiar O2 supply roles of hemoglobin and myoglobin. Here we report the discovery of a hitherto unrecognized family of proteins with a unique modular architecture, possessing an N-terminal calpain-like domain, an internal, circular permuted globin domain, and an IQ calmodulin-binding motif. Putative orthologs are present in the genomes of many metazoan taxa, including vertebrates. The calpain-like region is homologous to the catalytic domain II of the large subunit of human calpain-7. The glo…
Effects of Vildagliptin/Metformin Therapy on Patient-Reported Outcomes: Work Productivity, Patient Satisfaction, and Resource Utilization
2013
Introduction: Type 2 diabetes mellitus (T2DM) is associated not only with high direct healthcare costs, but also with indirect costs, as diabetic complications and the disease itself result in loss of productivity. Vildagliptin is a novel dipeptidyl peptidase-4 inhibitor that is given either alone or in combination with oral hypoglycemic drugs, including metformin. The study was designed to assess the hypothesis that fixed-combination vildagliptin/metformin improves work productivity measured as Work Productivity and Activity Impairment (WPAI) scores. Secondary objectives were the assessment of patient satisfaction by means of the Diabetes Treatment Satisfaction Questionnaire (DTSQs), the c…
Neuroprotective effects of antibodies on retinal ganglion cells in an adolescent retina organ culture
2016
Glaucoma, a neurodegenerative disease, is characterized by a progressive loss of retinal ganglion cells (rgc). Up- and down-regulated autoantibody immunoreactivities in glaucoma patients have been demonstrated. Previous studies showed protective effects of down-regulated antibodies [gamma (γ)-synuclein and glial fibrillary acidic protein [GFAP]) on neuroretinal cells. The aim of this study was to test these protective antibody effects on rgc in an organ culture model and to get a better understanding of cell-cell interactions of the retina in the context of the protective effect. We used an adolescent retinal organ culture (pig) with an incubation time of up to 4 days. Retinal explants were…
Low Hemoglobin Levels and Risk of Developing Depression in the Elderly: Results From the Prospective PRO.V.A. Study.
2016
OBJECTIVE Low hemoglobin negatively affects health in the elderly, but research about the association with risk for depression is limited. We investigated the association between baseline hemoglobin concentrations and incident depression in a cohort of nondepressed elderly individuals. METHODS As part of the Northern Italian Progetto Veneto Anziani (PRO.V.A.) study, randomly drawn, community-dwelling subjects aged ≥ 65 years underwent prospective clinical and laboratory assessments between October 1995 and December 2002. The association between baseline hemoglobin and depression was assessed with adjusted Cox regression analyses. Baseline serum hemoglobin concentrations were further categor…
Oral Semaglutide Versus Empagliflozin in Patients With Type 2 Diabetes Uncontrolled on Metformin: The PIONEER 2 Trial
2019
OBJECTIVE Efficacy and safety of the glucagon-like peptide 1 (GLP-1) analog oral semaglutide and the sodium–glucose cotransporter 2 inhibitor empagliflozin were compared in patients with type 2 diabetes uncontrolled on metformin. RESEARCH DESIGN AND METHODS Patients were randomized to once-daily open-label treatment with oral semaglutide 14 mg (n = 412) or empagliflozin 25 mg (n = 410) in a 52-week trial. Key end points were change from baseline to week 26 in HbA1c (primary) and body weight (confirmatory secondary). Two estimands addressed efficacy-related questions: treatment policy (regardless of trial product discontinuation or rescue medication) and trial product (on trial product with…
The use of statins in people at risk of developing diabetes mellitus: Evidence and guidance for clinical practice
2014
Reducing low-density lipoprotein cholesterol (LDL-C) levels using statins is associated with significant reductions in cardiovascular (CV) events in a wide range of patient populations. Although statins are generally considered to be safe, recent studies suggest they are associated with an increased risk of developing Type 2 diabetes (T2D). This led the US Food and Drug Administration (FDA) to change their labelling requirements for statins to include a warning about the possibility of increased blood sugar and HbA1c levels and the European Medicines Agency (EMA) to issue guidance on a small increased risk of T2D with the statin class. This review examines the evidence leading to these clai…
Identification and quantification of a new family of peptide endocannabinoids (Pepcans) showing negative allosteric modulation at CB1 receptors.
2012
The α-hemoglobin-derived dodecapeptide RVD-hemopressin (RVDPVNFKLLSH) has been proposed to be an endogenous agonist for the cannabinoid receptor type 1 (CB(1)). To study this peptide, we have raised mAbs against its C-terminal part. Using an immunoaffinity mass spectrometry approach, a whole family of N-terminally extended peptides in addition to RVD-Hpα were identified in rodent brain extracts and human and mouse plasma. We designated these peptides Pepcan-12 (RVDPVNFKLLSH) to Pepcan-23 (SALSDLHAHKLRVDPVNFKLLSH), referring to peptide length. The most abundant Pepcans found in the brain were tested for CB(1) receptor binding. In the classical radioligand displacement assay, Pepcan-12 was th…
Pancreatic ascites hemoglobin contributes to the systemic response in acute pancreatitis.
2015
Upon hemolysis extracellular hemoglobin causes oxidative stress and cytotoxicity due to its peroxidase activity. Extracellular hemoglobin may release free hemin, which increases vascular permeability, leukocyte recruitment, and adhesion molecule expression. Pancreatitis-associated ascitic fluid is reddish and may contain extracellular hemoglobin. Our aim has been to determine the role of extracellular hemoglobin in the local and systemic inflammatory response during severe acute pancreatitis in rats. To this end we studied taurocholate-induced necrotizing pancreatitis in rats. First, extracellular hemoglobin in ascites and plasma was quantified and the hemolytic action of ascitic fluid was …
Effects of exercise training on airway responsiveness and airway cells in healthy subjects.
2010
J Appl Physiol. 2010 Aug;109(2):288-94. Epub 2010 Jun 10. Effects of exercise training on airway responsiveness and airway cells in healthy subjects. Scichilone N, Morici G, Zangla D, Chimenti L, Davì E, Reitano S, Paternò A, Santagata R, Togias A, Bellia V, Bonsignore MR. SourceDept. of Internal Medicine, Div. of Pulmonology (DIBIMIS Univ. of Palermo, "Villa Sofia-Cervello" Hospital, Via Trabucco 180, 90146 Palermo, Italy. n.scichilone@libero.it Abstract Airway responsiveness to methacholine (Mch) in the absence of deep inspirations (DIs) is lower in athletes compared with sedentary individuals. In this prospective study, we tested the hypothesis that a training exercise program reduces th…