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HbA1c assays

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https://www.readbyqxmd.com/read/28531992/boronate-functionalized-hydrogel-as-a-novel-biosensing-interface-for-the-glycated-hemoglobin-a1c-hba1c-based-on-the-competitive-binding-with-signaling-glycoprotein
#1
Yong Duk Han, Ka Ram Kim, Yoo Min Park, Seung Yeon Song, Yong Ju Yang, Kangsun Lee, Yunhee Ku, Hyun C Yoon
According to recent increases in public healthcare costs associated with diabetes mellitus, the development of new glycemic monitoring techniques based on the biosensing of glycated hemoglobin A1c (HbA1c), a promising long-term glycemic biomarker, has become a major challenge. In the development of HbA1c biosensors for point-of-care applications, the selection of an effective biorecognition layer that provides a high reaction yield and specificity toward HbA1c is regarded as the most significant issue. To address this, we developed a novel HbA1c biosensing interfacial material by the integration of boronate hydrogel with glass fiber membrane...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28523459/plasma-vascular-endothelial-growth-factor-b-levels-are-increased-in-patients-with-newly-diagnosed-type-2-diabetes-mellitus-and-associated-with-the-first-phase-of-glucose-stimulated-insulin-secretion-function-of-%C3%AE-cell
#2
J Wu, H Wei, H Qu, Z Feng, J Long, Q Ge, H Deng
PURPOSE: To detect plasma vascular endothelial growth factor B (VEGF-B) in individuals with different glucose tolerance and investigate the relationship between plasma VEGF-B levels and the first phase of glucose-stimulated insulin secretion. METHODS: A cross-sectional study was conducted involving 45 patients with newly diagnosed type 2 diabetes mellitus (T2DM), 37 patients with impaired glucose regulation (IGR), and 39 Normal glucose tolerance (NGT) subjects, all of whom underwent intravenous glucose tolerance test...
May 18, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28498352/encapsulation-of-16-hydroxycleroda-3-13-dine-16-15-olide-in-mesoporous-silica-nanoparticles-as-a-natural-dipeptidyl-peptidase-4-inhibitor-potentiated-hypoglycemia-in-diabetic-mice
#3
Po-Kai Huang, Shi-Xiang Lin, May-Jywan Tsai, Max K Leong, Shian-Ren Lin, Ranjith Kumar Kankala, Chia-Hung Lee, Ching-Feng Weng
Natural supplements comprise good efficacy with less adverse effects as against diabetic therapy, but their advancement as anti-diabetic agents is unsatisfactory with regard to the delivery system. Dipeptidyl peptidase-4 (DPP4)/CD26) can degrade glucagon-like pepetide-1 (GLP-1) which renders a decrease of blood glucose levels. 16-hydroxycleroda-3,13-dine-16,15-olide (HCD) extracted from Polyalthia longifolia, exhibits numerous medicinal potentials including hypoglycemic potential. On consideration of HCD application, the bioavailability is affected by low solubility...
May 12, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28496345/glucose-lowering-therapies-adequacy-of-metabolic-control-and-their-relationship-with-comorbid-depression-in-outpatients-with-type-2-diabetes-in-a-tertiary-hospital-in-kenya
#4
Cf Frederick Otieno, Joseph E Kanu, Emma M Karari, Violet Okech-Helu, Mark D Joshi, Kenn Mutai
BACKGROUND: Depression and diabetes mellitus are important comorbid conditions with serious health consequences. When depression and diabetes are comorbid, depression negatively affects self-management activities of diabetes with serious consequences. Relationship between treatment regimens of diabetes, the adequacy of glycemic control, and occurrence of comorbid depression is not known among our patients. PATIENTS AND METHODS: This was a cross-sectional descriptive study at the outpatient diabetes clinic of the Kenyatta National Hospital where 220 ambulatory patients with type 2 diabetes on follow-up were systematically sampled...
2017: Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
https://www.readbyqxmd.com/read/28484010/erythritol-is-a-pentose-phosphate-pathway-metabolite-and-associated-with-adiposity-gain-in-young-adults
#5
Katie C Hootman, Jean-Pierre Trezzi, Lisa Kraemer, Lindsay S Burwell, Xiangyi Dong, Kristin A Guertin, Christian Jaeger, Patrick J Stover, Karsten Hiller, Patricia A Cassano
Metabolomic markers associated with incident central adiposity gain were investigated in young adults. In a 9-mo prospective study of university freshmen (n = 264). Blood samples and anthropometry measurements were collected in the first 3 d on campus and at the end of the year. Plasma from individuals was pooled by phenotype [incident central adiposity, stable adiposity, baseline hemoglobin A1c (HbA1c) > 5.05%, HbA1c < 4.92%] and assayed using GC-MS, chromatograms were analyzed using MetaboliteDetector software, and normalized metabolite levels were compared using Welch's t test...
May 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28477414/do-glycoalbumin-levels-preferentially-reflect-changes-in-postprandial-glucose-excursions
#6
S K Paul, R R Holman
AIMS: To evaluate whether plasma glycated albumin, which provides an integrated measure of plasma glucose levels over the preceding 2-4 weeks, better reflects changes in postprandial glucose excursions than HbA1c . METHODS: People with suboptimum glycaemic control on dual oral therapy were enrolled in the Treating-to-Target-in-Type 2 diabetes (4-T) trial, in which participants were randomized to the addition of once-daily basal insulin, twice-daily biphasic insulin or thrice-daily prandial insulin...
May 6, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28469104/investigation-and-analysis-of-hemoglobin-a1c-measurement-systems-performance-for-135-laboratories-in-china
#7
Hai-Jian Zhao, Tian-Jiao Zhang, Jie Zeng, Cui-Hua Hu, Rong Ma, Chuan-Bao Zhang
BACKGROUND: Hemoglobin A1c (HbA1c) measurement is of great value for the diagnosis and monitoring of diabetes. Many manufacturers have developed various experiments to determine the HbA1c concentration. However, the longitudinal use of these tests requires strict quality management. This study aimed to analyze the quality of HbA1c measurement systems in China using six sigma techniques to help improve their performances. METHODS: A total of 135 laboratories were involved in this investigation in 2015...
May 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28422968/the-impact-of-a-point-of-care-testing-device-on-cvd-risk-assessment-completion-in-new-zealand-primary-care-practice-a-cluster-randomised-controlled-trial-and-qualitative-investigation
#8
RANDOMIZED CONTROLLED TRIAL
Sue Wells, Natasha Rafter, Timothy Kenealy, Geoff Herd, Kyle Eggleton, Rose Lightfoot, Kim Arcus, Angela Wadham, Yannan Jiang, Chris Bullen
OBJECTIVES: To assess the effect of a point of care (POC) device for testing lipids and HbA1c in addition to testing by community laboratory facilities (usual practice) on the completion of cardiovascular disease (CVD) risk assessments in general practice. METHODS: We conducted a pragmatic, cluster randomised controlled trial in 20 New Zealand general practices stratified by size and rurality and randomised to POC device plus usual practice or usual practice alone (controls)...
2017: PloS One
https://www.readbyqxmd.com/read/28415730/a-polymorphism-at-igf1-locus-is-associated-with-anemia
#9
Maria Adelaide Marini, Gaia Chiara Mannino, Teresa Vanessa Fiorentino, Francesco Andreozzi, Francesco Perticone, Giorgio Sesti
In vitro and in vivo studies suggest that IGF-1 has a role in erythropoiesis. There is evidence that the rs35767 C/T polymorphism near IGF1 is associated with plasma IGF-1 levels. We investigated the effect of this polymorphism on hemoglobin (Hb) concentration and anemia. The study group comprised 3286 adult Whites. The rs35767 polymorphism was screened using a TaqMan allelic discrimination assay. The rs35767 polymorphism was not associated with age, gender, BMI, waist circumference, smoking, blood pressure, plasma glucose, HbA1c, type 2 diabetes, HOMA-IR, hsCRP, eGFR, and lipid profile...
May 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28413419/role-of-vitamin-d-on-glycemic-control-and-oxidative-stress-in-type-2-diabetes-mellitus
#10
Mostafa Saif-Elnasr, Iman M Ibrahim, Manal M Alkady
BACKGROUND: Vitamin D deficiency may play a key role in the development of impaired glucose tolerance, type 2 diabetes mellitus (T2DM), and metabolic syndrome. Several studies have shown that Vitamin D has an antioxidant property. We aimed to investigate 25-hydroxy Vitamin D (25[OH]D) levels in patients with T2DM and in nondiabetic healthy controls and to ascertain the impact of 25(OH)D levels on glycemic control and oxidative stress in T2DM patients. MATERIALS AND METHODS: Thirty male patients with T2DM and twenty age- and socioeconomic status-matched male healthy controls were included in the study...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28410925/circulating-osteocalcin-is-unrelated-to-glucose-homoeostasis-in-adults-with-type-1-diabetes
#11
Bu B Yeap, Wendy A Davis, Kirsten Peters, Emma J Hamilton, Valentina Rakic, Stephen A Paul Chubb, Timothy M E Davis
AIMS: To assess the relationship between total osteocalcin (tOC), undercarboxylated osteocalcin (ucOC) and a range of markers of glucose homeostasis in type 1 diabetes. METHODS: One hundred and eight community-based Caucasian adults (53 males, 55 females) without a history of osteoporosis and with a mean±SD age 39.1±15.1years and median [inter-quartile range] type 1 diabetes duration of 14.3 [6.6-20.4] years participated in a cross-sectional study of bone health...
June 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28407371/effects-of-hemoglobin-variants-hbj-bangkok-hbe-hbg-taipei-and-hbh-on-analysis-of-glycated-hemoglobin-via-ion-exchange-high-performance-liquid-chromatography
#12
Xiu-Ming Zhang, Dong-Mei Wen, Sheng-Nan Xu, Ming-Huan Suo, Ya-Qiong Chen
BACKGROUND: To explore the effects of HbJ Bangkok, HbE, HbG Taipei, and α-thalassemia HbH on the results of HbA1c assessment using ion-exchange high-performance liquid chromatography (IE-HPLC). METHODS: We enrolled five patients in which the results of the IE-HPLC HbA1c assay were inconsistent with the average levels of FBG. We performed hemoglobin capillary (Hb) electrophoresis using whole-blood samples. We also sequenced the genes encoding Hb using dideoxy-mediated chain termination and analyzed HbA1c using borate affinity HPLC (BA-HPLC) and turbidimetric inhibition immunoassay (TINIA)...
April 13, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28406728/clinical-evaluation-of-a-polyherbal-nutritional-supplement-in-dyslipidemic-volunteers
#13
Subramanian Suganya, Subapriya Natarajan, Duraipandian Chamundeeswari, Anand Anbarasu, Kunissery A Balasubramanian, Lynn C Schneider, Balaji Nandagopal
Ten important plant parts routinely used in South Indian ethnic food preparation as spices and condiments were investigated for their potential antidyslipidemic properties. The aim of the study was to characterize the biochemical properties of the polyherbal formulation (nutritional supplement) and evaluate its use to control dyslipidemia in patients. Phytochemical evaluation, in vitro α-amylase inhibitory assay, and high performance thin layer chromatography (HPTLC) fingerprinting were carried out with alcoholic extracts of all 10 individual plants and with the nutritional supplement...
November 2, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28401620/atp4a-autoimmunity-in-pediatric-patients-with-type-1-diabetes-and-its-relationship-to-blood-count-iron-metabolism-and-vitamin-b12
#14
Agata Chobot, Ewa Rusak, Janet Wenzlau, Howard Davidson, Piotr Adamczyk, Agnieszka Krzywicka, Bogdan Mazur, Joanna Polańska, Marian Rewers
OBJECTIVE: We aimed to assess the prevalence of autoantibodies against the 4A subunit of the gastric proton pump (ATP4A) in pediatric type 1 diabetes (T1D) patients and explore the relationship between ATP4A positivity and blood cell count, iron turnover, and vitamin B12 concentration. SUBJECTS: The study included 94 (59% female) T1D children (aged 12.5 ± 4.1 years, T1D duration 4.2 ± 3.6 years, HbA1c 7.3 ± 1.5% (57 ± 12.6 mmol/mol) with no other autoimmune diseases...
April 12, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28387422/validation-and-determination-of-a-reference-interval-for-canine-hba1c-using-an-immunoturbidimetric-assay
#15
Anne F Goemans, Susanna J Spence, Ian K Ramsey
BACKGROUND: Hemoglobin A1c (HbA1c) provides a reliable measure of glycemic control over 2-3 months in human diabetes mellitus. In dogs, presence of HbA1c has been demonstrated, but there are no validated commercial assays. OBJECTIVE: The purpose of the study was to validate a commercially available automated immunoturbidimetric assay for canine HbA1c and determine an RI in a hospital population. METHODS: The specificity of the assay was assessed by inducing glycosylation in vitro using isolated canine hemoglobin, repeatability by measuring canine samples 5 times in succession, long term inter-assay imprecision by measuring supplied control materials, stability using samples stored at 4°C over 5 days and -20°C over 8 weeks, linearity by mixing samples of known HbA1c in differing proportions, and the effect of anticoagulants with paired samples...
April 7, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28382439/plasma-level-of-mir-93-is-associated-with-higher-risk-to-develop-type-2-diabetic-retinopathy
#16
Hui-Ling Zou, Yan Wang, Qiang Gang, Ying Zhang, Yu Sun
PURPOSE: MicroRNA-93 (miR-93) usually acts as a promoter of tumor progression in several human carcinomas. It has been found distinctly high in eyes with proliferative diabetic retinopathy (DR). The present study aims to investigate the role of plasma miR-93 in the progression of type 2 diabetic retinopathy (T2DR). METHODS: Our study subjects were made up of 140 type 2 diabetes mellitus (T2DM) patients who were assigned into DR (DR patients, n = 75), NDR (non-DR patients, n = 65), and control (healthy individuals, n = 127) groups...
April 5, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28365449/multicenter-evaluation-of-an-enzymatic-method-for-glycated-albumin
#17
Renata Paleari, Graziella Bonetti, Cinzia Callà, Mariarosa Carta, Ferruccio Ceriotti, Nicola Di Gaetano, Marilisa Ferri, Elena Guerra, Gabriella Lavalle, Claudia Lo Cascio, Francesca Gabriela Martino, Martina Montagnana, Marco Moretti, Gabriele Santini, Donata Scribano, Roberto Testa, Anna Vero, Andrea Mosca
BACKGROUND: The use of glycated albumin (GA) has been proposed as an additional glycemic control marker particularly useful in intermediate-term monitoring and in situation when HbA1c test is not reliable. METHODS: We have performed the first multicenter evaluation of the analytical performance of the enzymatic method quantILab Glycated Albumin assay implemented on the most widely used clinical chemistry analyzers (i.e. Abbott Architect C8000, Beckman Coulter AU 480 and 680, Roche Cobas C6000, Siemens ADVIA 2400 and 2400 XPT)...
March 29, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28326795/digital-health-care-by-in-silico-glycation-of-hba1-blood-cells
#18
James M Minor, Leslie M Rickey, Richard M Bergenstal
BACKGROUND: Diabetes health care relies on the HbA1c (A1c) assay and associated average glucose (AG) to evaluate and control chronic glycemia. However, the A1c assay is plagued with significant noise, lag time, and specificity issues. Current studies support the significant health care advantage of clinical action based on real-time blood glucose (BG) metrics. We seek to improve diabetes management by directly relating such metrics to AG levels as mediated by recently discovered recurrent endocrine cycles...
March 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28290602/ajs1669-a-novel-small-molecule-muscle-glycogen-synthase-activator-improves-glucose-metabolism-and-reduces-body-fat-mass-in-mice
#19
Kazuhiro Nakano, Sen Takeshita, Noriko Kawasaki, Wataru Miyanaga, Yoriko Okamatsu, Mizuki Dohi, Tadakiyo Nakagawa
Impaired glycogen synthesis and turnover are common in insulin resistance and type 2 diabetes. As glycogen synthase (GS) is a key enzyme involved in the synthetic process, it presents a promising therapeutic target for the treatment of type 2 diabetes. In the present study, we identified a novel, potent and orally available GS activator AJS1669 {sodium 2-[[5-[[4-(4,5-difluoro-2-methylsulfanyl-phenyl)phenoxy] methyl]furan-2-carbonyl]-(2-furylmethyl)amino] acetate}. In vitro, we performed a glycogen synthase 1 (GYS1) activation assay for screening GS activators and identified that the activity of AJS1669 was further potentiated in the presence of glucose-6-phosphate (G6P)...
April 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28252873/glucose-metabolism-in-completed-suicide-a-forensic-pathological-pilot-study
#20
Jonas Forsman, Terhi Keltanen, Benny Liberg, Antti Sajantila, Thomas Masterman, Katarina Lindroos
AIM: To determine whether antemortem blood levels of glycated hemoglobin (HbA1c) and glucose predict completed suicide and, by extension, whether markers of glucose metabolism might be associated with a prosuicidal trait or state. METHOD: From consecutively performed autopsies, samples of blood and vitreous humor from 17 suicide victims and 27 non-suicide controls were compared with regard to levels of glucose, lactate, and HbA1c. RESULTS: Mean HbA1c was higher, and mean estimated blood glucose lower, among suicide victims, although tests revealed no significant differences (P=0...
February 28, 2017: Croatian Medical Journal
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