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HbA1c assays

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https://www.readbyqxmd.com/read/28326795/digital-health-care-by-in-silico-glycation-of-hba1-blood-cells
#1
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
#2
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)...
March 7, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28252873/glucose-metabolism-in-completed-suicide-a-forensic-pathological-pilot-study
#3
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
https://www.readbyqxmd.com/read/28231061/role-of-treatment-modifying-mthfr677c-t-and-1298a-c-polymorphisms-in-metformin-treated-puerto-rican-patients-with-type-2-diabetes-mellitus-and-peripheral-neuropathy
#4
Francisco J Jiménez-Ramírez, Liza M Castro, Clarymar Ortiz, Jennifer Concepción, Jessicca Y Renta, Raúl H Morales-Borges, Jorge R Miranda-Massari, Jorge Duconge
BACKGROUND: The study was conducted to investigate potential association between MTHFR genotypes and diabetic peripheral neuropathy (DPN) in Puerto Ricans with type-2 diabetes mellitus (T2DM) treated with metformin. The prevalence of major MTHFR polymorphisms in this cohort was also ascertained. METHODS: DNAs from 89 metformin-treated patients with T2DM and DPN were genotyped using the PCR-based RFLP assay for MTHFR677C>T and 1298A>C polymorphisms. Frequency distributions of these variants in the study cohort were compared to those reported for three reference populations (HapMap project) and controls (400 newborn specimens)...
March 1, 2017: Drug Metabolism and Personalized Therapy
https://www.readbyqxmd.com/read/28202005/impact-of-gut-hormone-fgf-19-on-type-2-diabetes-and-mitochondrial-recovery-in-a-prospective-study-of-obese-diabetic-women-undergoing-bariatric-surgery
#5
Lucia Martinez de la Escalera, Ioannis Kyrou, Jana Vrbikova, Voitech Hainer, Petra Sramkova, Martin Fried, Milan K Piya, Sudhesh Kumar, Gyanendra Tripathi, Philip G McTernan
BACKGROUND: The ileal-derived hormone, fibroblast growth factor 19 (FGF-19), may promote weight loss and facilitate type-2 diabetes mellitus remission in bariatric surgical patients. We investigated the effect of different bariatric procedures on circulating FGF-19 levels and the resulting impact on mitochondrial health in white adipose tissue (AT). METHODS: Obese and type-2 diabetic women (n = 39, BMI > 35 kg/m(2)) undergoing either biliopancreatic diversion (BPD), laparoscopic greater curvature plication (LGCP), or laparoscopic adjustable gastric banding (LAGB) participated in this ethics approved study...
February 16, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28182339/the-circulating-levels-of-complement-c1q-tnf-related-protein-13-ctrp13-in-patients-with-type-2-diabetes-and-its-association-with-insulin-resistance
#6
Abolfazl Afrookhteh, Solaleh Emamgholipour, Behnam Alipoor, Nariman Moradi, Reza Meshkani, Ensieh Nasli-Esfahani, Ali Rahimipour, Mehrnoosh Shanaki
BACKGROUND: Complement-C1q/TNF-related protein 13 (CTRP13) is a novel adipokine involved in the regulation of energy metabolism. Here, we sought to evaluate serum levels of CTRP13 and adiponectin in patients with type 2 diabetes (T2D) (n = 40) and healthy subjects (n = 40) and also to study the association of CTRP13 levels with diabetes-related indices. METHODS: Circulating levels of CTRP13 and adiponectin were measured by enzyme-linked immunosorbent assay (ELISA) in T2D patients (n = 40) and in an age and gender-matched control group (n = 40)...
February 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28178951/high-sensitive-c-reactive-protein-and-risk-of-incident-type-2-diabetes-a-case-control-study-nested-within-the-singapore-chinese-health-study
#7
An Pan, Yeli Wang, Jian-Min Yuan, Woon-Puay Koh
BACKGROUND: The liver-derived C-reactive protein (CRP) is a sensitive and systemic biomarker of inflammation, and has been associated with increased risk of developing type 2 diabetes in populations other than Chinese. Therefore, we prospectively examined the relation between plasma levels of CRP and risk of type 2 diabetes (T2D) among a Chinese population. METHODS: Plasma high-sensitive CRP (hs-CRP) concentrations were assayed among 571 T2D cases and 571 controls nested in the prospective cohort of the Singapore Chinese Health Study...
February 8, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28164640/unexpected-detection-of-hbh-cs-in-a-pregnant-woman-by-assessing-hba1c-using-capillary-electrophoresis
#8
Liangying Zhong, Miansheng Yan, Min Liu, Yingjun Xie, Lingling Xu, Linhuan Huang
BACKGROUND: Testing for hemoglobin A1C (HbA1C) is useful for following up on glycemic control in diabetic patients as well as in pregnant women. METHODS: A pregnant Chinese woman appeared for regular pregnancy check-ups. While monitoring blood glucose, an HbA1c test was initially performed in the pregnant Chinese woman using a CE-HPLC assay and capillary electrophoresis. Then acid gel Hb electrophoresis, a reverse dot-blot (RDB) assay, gap-PCR and DNA sequencing were applied to further evaluate the Hb variants...
July 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28164565/multicenter-evaluation-of-a-new-high-throughput-hba1c-testing-platform
#9
R Imdahl, R Roddiger, E Casis-Saenz
BACKGROUND: This non-interventional, multicenter study with anonymized leftover patient samples was performed to evaluate the reliability and analytical performance of the novel high-throughput HbA1c cobas c 513 analyzer. METHODS: A performance evaluation was carried out at three sites to validate the overall system functionality, user interaction and analytical performance of the new cobas c 513 analyzer using the Tina-quant® HbA1c Gen. 3 assay. RESULTS: HbA1c applications for both whole blood and hemolysate samples show a high precision using both quality control materials and pools of whole blood or hemolysates...
December 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28159227/alterations-of-serum-trace-elements-in-patients-with-type-2-diabetes
#10
Hongmei Zhang, Chonghuai Yan, Zhen Yang, Weiwei Zhang, Yixin Niu, Xiaoyong Li, Li Qin, Qing Su
OBJECTIVE: The aim of the present study is to investigate the association of trace elements and the risk of type 2 diabetes mellitus. DESIGN AND METHODS: The 1837 participants (637 men and 1200 women) aged 40-70 were from a cross-sectional community-based study performed in downtown Shanghai. All the participants without diabetes mellitus history underwent a 75-g OGTT. The participants with diabetes mellitus took 100g steamed bread as the substitute. The fasting and OGTT 2h or postprandial 2h venous blood samples were collected...
March 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28150817/association-of-genomic-instability-with-hba1c-levels-and-medication-in-diabetic-patients
#11
Annemarie Grindel, Helmut Brath, Armen Nersesyan, Siegfried Knasmueller, Karl-Heinz Wagner
Diabetes Mellitus type 2 (DM2) is associated with increased cancer risk. Instability of the genetic material plays a key role in the aetiology of human cancer. This study aimed to analyse genomic instability with the micronucleus cytome assay in exfoliated buccal cells depending on glycated haemoglobin (HbA1c) levels and medication in 146 female DM2 patients. The occurrence of micronuclei was significantly increased in DM2 patients compared to healthy controls. Furthermore, it was doubled in DM2 patients with HbA1c > 7...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28111966/procoagulant-activity-in-patients-with-combined-type-2-diabetes-and-coronary-artery-disease-no-effects-of-long-term-exercise-training
#12
Vibeke Bratseth, Rune Byrkjeland, Ida U Njerve, Svein Solheim, Harald Arnesen, Ingebjørg Seljeflot
We investigated the effects of 12-month exercise training on hypercoagulability in patients with combined type 2 diabetes mellitus and coronary artery disease. Associations with severity of disease were further explored. Patients ( n = 131) were randomized to exercise training or a control group. Blood was collected at inclusion and after 12 months. Tissue factor, free and total tissue factor pathway inhibitor, prothrombin fragment 1 + 2 (F1 + 2) and D-dimer were determined by enzyme-linked immunosorbent assay and ex vivo thrombin generation by the calibrated automated thrombogram assay...
January 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28107170/hb-variants-in-korea-effect-on-hba1c-using-five-routine-methods
#13
Yeo-Min Yun, Misuk Ji, Dae-Hyun Ko, Sail Chun, Gye Cheol Kwon, Kyunghoon Lee, Sang Hoon Song, Moon Woo Seong, Sung Sup Park, Junghan Song
BACKGROUND: Quantification of glycated hemoglobin (HbA1c) is a challenge in patients with hemoglobin (Hb) variants. We evaluated the impact of various Hb variants on five routine HbA1c assays by comparing with the IFCC reference measurement procedure (RMP). METHODS: Whole blood samples showing warning flags or no results on routine HPLC HbA1c assays were confirmed for Hb variants and were submitted to HbA1c quantification using Sebia Capillarys 2 Flex Piercing, Roche Tina-quant HbA1c Gen...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28097881/evaluation-of-hemoglobin-a1c-measurement-from-filter-paper-using-high-performance-liquid-chromatography-and-immunoturbidimetric-assay
#14
Yonghua Wu, Xu Yang, Haining Wang, Zhenrong Li, Tiancheng Wang
Glycated hemoglobin (HbA1c) measurement from whole blood (WB) samples is inconvenient for epidemic surveillance and self-monitoring of glycemic level. We evaluated HbA1c measurement from WB blotted on filter paper (FP), which can be easily transported to central laboratories, with high-performance liquid chromatography (HPLC) and immunoturbidimetric assay (ITA). WB was applied to Whatman filter paper. By using HPLC and WB samples as reference methods, these FP samples were evaluated on HPLC and ITA. Inter- and intra-assay variation, WB vs...
April 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28086872/dapagliflozin-decreases-small-dense-low-density-lipoprotein-cholesterol-and-increases-high-density-lipoprotein-2-cholesterol-in-patients-with-type-2-diabetes-comparison-with-sitagliptin
#15
Toshiyuki Hayashi, Tomoyasu Fukui, Noriko Nakanishi, Saki Yamamoto, Masako Tomoyasu, Anna Osamura, Makoto Ohara, Takeshi Yamamoto, Yasuki Ito, Tsutomu Hirano
BACKGROUND: The sodium-glucose co-transporter-2 (SGLT-2) inhibitors have been reported to increase both low-density lipoprotein (LDL) and high-density lipoprotein (HDL)-cholesterol (C). This study aimed to determine how SGLT-2 inhibitors affect LDL and HDL-C subspecies. METHODS: This single center, open-label, randomized, prospective study included 80 patients with type 2 diabetes taking prescribed oral hypoglycemic agents. Patients were allocated to receive dapagliflozin (n = 40) or sitagliptin (n = 40) as add-on treatment...
January 13, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28049995/clinical-implication-of-plasma-hydrogen-sulfide-levels-in-japanese-patients-with-type-2-diabetes
#16
COMPARATIVE STUDY
Kunihiro Suzuki, Masaaki Sagara, Chie Aoki, Seiichi Tanaka, Yoshimasa Aso
Objective The goal of the present study was to investigate the plasma hydrogen sulfide (H2S) levels in patients with type 2 diabetes, as the plasma H2S levels in Japanese patients with type 2 diabetes remain unclear. Methods The plasma H2S levels were measured in 154 outpatients with type 2 diabetes and 66 outpatients without diabetes. All blood samples were collected in the outpatient department from 09:00 to 10:00. The patients had fasted from 21:00 the previous evening and had not consumed alcohol or caffeine or smoked until sample collection...
2017: Internal Medicine
https://www.readbyqxmd.com/read/27994825/effects-of-pomegranate-seed-oil-on-metabolic-state-of-patients-with-type-2-diabetes-mellitus
#17
Zahra Faghihimani, Parvin Mirmiran, Golbon Sohrab, Bijan Iraj, Elham Faghihimani
BACKGROUND: Rapid increasing prevalence of diabetes mellitus is a serious health concern in the world. New data determined that the pathogenesis of diabetes mellitus is chronic low-grade inflammation, resulting insulin resistance. Pomegranate seed oil (PSO) has anti-inflammatory effects; though it may reduce insulin resistance and improve glycemia in diabetes mellitus. The present study has been designed to investigate the effects of PSO as a natural dietary component on metabolic state of patients with Type 2 diabetes mellitus...
2016: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/27965024/a-novel-glp-1-analog-a-dimer-of-glp-1-via-covalent-linkage-by-a-lysine-prolongs-the-action-of-glp-1-in-the-treatment-of-type-2-diabetes
#18
Yingying Pan, Siwei Shi, Xun Lao, Jinlong Zhang, Shiming Tan, Zirong Wu, Jing Huang
GLP-1 is an incretin hormone that can effectively lower blood glucose, however, the short time of biological activity and the side effect limit its therapeutic application. Many methods have been tried to optimize GLP-1 to extend its in vivo half-time, reduce its side effect and enhance its activity. Here we have chosen the idea to dimerize GLP-1 with a C-terminal lysine to form a new GLP-1 analog, DLG3312. We have explored the structure and the biological property of DLG3312, and the results indicated that DLG3312 not only remained the ability to activate the GLP-1R, but also strongly stimulated Min6 cell to secrete insulin...
February 2017: Peptides
https://www.readbyqxmd.com/read/27942500/salvia-officinalis-sage-leaf-extract-as-add-on-to-statin-therapy-in-hypercholesterolemic-type-2-diabetic-patients-a-randomized-clinical-trial
#19
Saeed Kianbakht, Farzaneh Nabati, Behrooz Abasi
The efficacy and safety of Salvia officinalis combined with statin have not been evaluated in dyslipidemic diabetes mellitus type 2 (DDMT2) so far. The plant extract antioxidant activity was determined by the DPPH radical scavenging assay. The total flavonoid, total phenolic and quercetin contents of the capsules containing the plant extract were also measured. Moreover, the effects of 2-month extract intake (500 mg capsule three times a day) as add-on to daily use of 15 mg glyburide, 2000 mg metformin and 10 mg atorvastatin on the blood levels of fasting glucose (FG), 2 h postprandial glucose (2hPPG), glycosylated hemoglobin (HbA1c), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), triglyceride, high-density lipoprotein cholesterol (HDL-C), serum aspartate aminotransferase (AST), serum alanine aminotransferase (ALT), creatinine and body mass index were studied in 50 patients and compared with the placebo group (n=50)...
2016: International Journal of Molecular and Cellular Medicine
https://www.readbyqxmd.com/read/27942008/the-dpp4-inhibitor-linagliptin-protects-from-experimental-diabetic-retinopathy
#20
Nadine Dietrich, Matthias Kolibabka, Stephanie Busch, Petra Bugert, Ulrike Kaiser, Jihong Lin, Thomas Fleming, Michael Morcos, Thomas Klein, Andrea Schlotterer, Hans-Peter Hammes
BACKGROUND/AIMS: Dipeptidyl peptidase 4 (DPP4) inhibitors improve glycemic control in type 2 diabetes, however, their influence on the retinal neurovascular unit remains unclear. METHODS: Vasculo- and neuroprotective effects were assessed in experimental diabetic retinopathy and high glucose-cultivated C. elegans, respectively. In STZ-diabetic Wistar rats (diabetes duration of 24 weeks), DPP4 activity (fluorometric assay), GLP-1 (ELISA), methylglyoxal (LC-MS/MS), acellular capillaries and pericytes (quantitative retinal morphometry), SDF-1a and heme oxygenase-1 (ELISA), HMGB-1, Iba1 and Thy1...
2016: PloS One
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