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Glycosylated Albumin

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https://www.readbyqxmd.com/read/28624473/antibody-blood-brain-barrier-efflux-is-modulated-by-glycan-modification
#1
John M Finke, Kari R Ayres, Ryan P Brisbin, Hali A Hill, Emily E Wing, William A Banks
BACKGROUND: Drug delivery to the brain is a major roadblock to treatment of Alzheimer's disease. Recent results of the PRIME study indicate that increasing brain penetration of antibody drugs improves Alzheimer's treatment outcomes. New approaches are needed to better accomplish this goal. Based on prior evidence, the hypothesis that glycan modification alters antibody blood-brain barrier permeability was tested here. METHODS: The blood-brain barrier permeability coefficient Pe of different glycosylated states of anti-amyloid IgG was measured using in vitro models of brain microvascular endothelial cells...
June 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28603992/glycosylated-platinum-iv-complexes-as-substrates-for-glucose-transporters-gluts-and-organic-cation-transporters-octs-exhibited-cancer-targeting-and-human-serum-albumin-binding-properties-for-drug-delivery
#2
Jing Ma, Qingpeng Wang, Zhonglv Huang, Xiande Yang, Quandeng Nie, Wenpei Hao, Peng George Wang, Xin Wang
Glycosylated platinum(IV) complexes were synthesized as substrates for GLUTs and OCTs for the first time, and the cytotoxicity, and detailed mechanism were determined in vitro and in vivo. Galactoside Pt(IV), glucoside Pt(IV) and mannoside Pt(IV) were highly cytotoxic and showed specific cancer-targeting properties in vitro and in vivo. Glycosylated platinum(IV) complexes 5, 6, 7 and 8 (IC50 0.24 μM-3.97 μM) had better antitumor activity of nearly 166-fold higher than the positive controls cisplatin (1a), oxaliplatin (3a) and satraplatin (5a)...
June 12, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28578411/red-cell-distribution-width-as-a-significant-indicator-of-medication-and-prognosis-in-type-2-diabetic-patients
#3
Xiao-Fen Xiong, Yuan Yang, Xianghui Chen, Xuejing Zhu, Chun Hu, Yachun Han, Li Zhao, Fuyou Liu, Lin Sun
Whether red cell distribution width (RDW) can be a potential indicator for diabetic nephropathy (DN) is unknown. A total of 809 type 2 diabetes mellitus (T2D) patients were divided into 4 groups according to the quartiles (Q) of the RDW (%): Q1 ≤ 12.4 (n = 229), 12.4 < Q2 ≤ 12.9 (n = 202), 12.9 < Q3 < 13.5 (n = 168), Q4 ≥ 13.5 (n = 210). Results showed that the levels in Q4 group was higher in age, disease duration, systolic blood pressure, blood urea nitrogen, creatinine, uric acid and proteinuria but lower in hemoglobin, serum albumin and glycosylated hemoglobin compared to Q1 group...
June 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28554385/co-overexpression-of-mgat1-and-mgat4-in-cho-cells-for-production-of-highly-sialylated-albumin-erythropoietin
#4
Hyun-Myoung Cha, Jin-Hyuk Lim, Jung-Heum Yeon, Jeong-Min Hwang, Dong-Il Kim
Terminal sialic acids on N-glycan of recombinant human erythropoietin are very important for in vivo half-life, as this glycoprotein has three N-glycosylation sites. N-acetylglucosaminyltransferases I, II, IV, and V (i.e. Mgat1, Mgat2, Mgat4, and Mgat5) catalyze the formation of a glycan antennary structure. These enzymes display different reaction kinetics for a common substrate and generally show low expression in Chinese hamster ovary (CHO) cells. Therefore, genetic control of Mgat expression is an effective method to increase sialic acid contents by enhancing glycan antennarity...
August 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/28551118/synthesis-of-hydrazide-functionalized-hydrophilic-polymer-hybrid-graphene-oxide-for-highly-efficient-n-glycopeptide-enrichment-and-identification-by-mass-spectrometry
#5
Haihong Bai, Yiting Pan, Cong Guo, Xinyuan Zhao, Bingquan Shen, Xinghe Wang, Zeyuan Liu, Yuanguo Cheng, Weijie Qin, Xiaohong Qian
Protein N-glycosylation is one of the most important post-translational modifications, participating in many key biological and pathological processes. Large-scale and precise identification of N-glycosylated proteins and peptides is especially beneficial for understanding their biological functions and for discovery of new clinical biomarkers and therapeutic drug targets. However, protein N-glycosylation is microheterogeneous and low abundant in living organisms, therefore specific enrichment of N-glycosylated proteins/peptides before mass spectrometry analysis is a prerequisite...
August 15, 2017: Talanta
https://www.readbyqxmd.com/read/28520799/nonenzymatic-glycosylation-of-human-serum-albumin-and-its-effect-on-antibodies-profile-in-patients-with-diabetes-mellitus
#6
Alok Raghav, Jamal Ahmad, Khursheed Alam
BACKGROUND: Albumin glycation and subsequent formation of advanced glycation end products (AGEs) correlate with diabetes and associated complications. METHODS: Human Serum Albumin (HSA) was modified with D-glucose for a 40 day period under sterile conditions at 37°C. Modified samples along with native HSA (unmodified) were analyzed for structural modifications by UV and fluorescence, FTIR, Liquid chromatography mass spectrometry (LCMS) and X-ray crystallography...
2017: PloS One
https://www.readbyqxmd.com/read/28507626/follow-up-of-value-of-the-intrarenal-resistivity-indices-and-different-renal-biomarkers-for-early-identification-of-diabetic-nephropathy-in-type-1-diabetic-patients
#7
Soha Abd El Dayem, Abo El Magd El Bohy, Mona Hamed, Solaf Ahmed
AIM: To evaluate intrarenal resistivity index (RI) and different biomarkers of diabetic nephropathy (DN) with clinical signs of DN and its progression over time as early detection of DN. PATIENTS AND METHODS: This longitudinal study included 48 type 1 diabetic patients who were studied at baseline and after three years. A blood sample was taken for assessment of glycosylated haemoglobin (HbA1), lipid profile and a urine sample was taken for assessment of albumin/creatinine ratio, Neutrophil gelatinase-associated lipocalin (NGAL), liver-type fatty acid binding protein (L-FABP) and kidney injury molecule-1 (Kim-1) at baseline and after three years...
April 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28507616/leptin-and-lipid-profile-in-overweight-patient-with-type-1-diabetes
#8
Soha M Abd El Dayem, Mona Abd El Kader, Soheir Ibrahim, Enas Mokhtar, Eman Abd El Megeed
AIM: To evaluate leptin and lipid profile in overweight patients with type 1 diabetes. PATIENTS AND METHODS: The study included 50 overweight patients with type 1 diabetes and 50 age and sex matched healthy controls. Blood samples were taken for evaluation of glycosylated haemoglobin, lipid profile and leptin. Also, urine samples were taken for evaluation of albumin/creatinine ratio. RESULTS: Leptin level was significantly lower in overweight with type 1 diabetes and showed a significant positive correlation with hip circumference and body mass index and negative correlation with glycosylated haemoglobin (HbA1c)...
April 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28501217/edta-functionalized-magnetic-nanoparticles-a-suitable-platform-for-the-analysis-of-low-abundance-urinary-proteins
#9
Paulo Bastos, Fábio Trindade, Rita Ferreira, Adelino Leite-Moreira, Inês Falcão-Pires, Bruno Manadas, Ana L Daniel-da-Silva, Rui Vitorino
Urine is a highly attractive source of biological information and disease biomarkers, whose proteome characterization is ongoing. To that end, depletion/enrichment strategies for protein analysis can be of great convenience. We have thus developed a method based on the use of EDTA-functionalized magnetic nanoparticles (NPs@EDTA), to fractionate urine samples before liquid chromatography-mass spectrometry analysis and compared the identified proteins with those obtained from ultrafiltrated/unfractionated (UF) urine samples...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28501198/introducing-plasma-serum-glycodepletion-for-the-targeted-proteomics-analysis-of-cytolysis-biomarkers
#10
Pauline Maes, Sandrine Donadio-Andréi, Mathilde Louwagie, Yohann Couté, Guillaume Picard, Claire Lacoste, Christophe Bruley, Jérôme Garin, Philippe Ichai, Jamila Faivre, Michel Jaquinod, Virginie Brun
A major class of clinical biomarkers is constituted of intracellular proteins which are leaking into the blood following ischemia, exposure to toxic xenobiotics or mechanical aggression. Their ectopic presence in plasma/serum is an indicator of tissue damage and raises a warning signal. These proteins, referred to as cytolysis biomarkers, are generally of cytoplasmic origin and as such, are devoid of glycosylation. In contrast, most plasma/serum proteins originate from the hepatic secretory pathway and are heavily glycosylated (at the exception of albumin)...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28395215/evaluation-of-kidney-function-and-risk-factors-of-retinopathy-in-type-2-diabetes-mellitus-people-in-south-africa
#11
F A Ganjifrockwala, J T Joseph, G George
AIM: Diabetic retinopathy (DR) is a disease of the retina and an important microvascular complication of diabetes, frequently causing blindness in adults. The study aims to evaluate kidney function and risk factors for the development of retinopathy in Type 2 diabetes mellitus (DM) patients. METHODS: A total of 140 participants (54 Type 2DM without retinopathy, 44 with DR and 42 normal, healthy controls) consented to participate in the study. Fasting plasma glucose (FPG), glycosylated haemoglobin (HbA1c), lipid profile and renal function tests were measured using routine laboratory methods...
May 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28350354/proteomic-profiling-comparing-the-effects-of-different-heat-treatments-on-camel-camelus-dromedarius-milk-whey-proteins
#12
COMPARATIVE STUDY
Hicham Benabdelkamel, Afshan Masood, Ibrahim O Alanazi, Dunia A Alzahrani, Deema K Alrabiah, Sami A AlYahya, Assim A Alfadda
Camel milk is consumed in the Middle East because of its high nutritional value. Traditional heating methods and the duration of heating affect the protein content and nutritional quality of the milk. We examined the denaturation of whey proteins in camel milk by assessing the effects of temperature on the whey protein profile at room temperature (RT), moderate heating at 63 °C, and at 98 °C, for 1 h. The qualitative and quantitative variations in the whey proteins before and after heat treatments were determined using quantitative 2D-difference in gel electrophoresis (DIGE)-mass spectrometry...
March 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28329747/influence-of-dipeptidyl-peptidase-iv-inhibitor-sitagliptin-on-extracellular-signal-regulated-kinases-1-2-signaling-in-rats-with-diabetic-nephropathy
#13
Xiaojun Ren, Gaohong Liu, Yanhong Wang, Wan Zhang, Fuping Xue, Rongshan Li, Weimin Yu
The protective effects of sitagliptin on the kidneys of rats with diabetic nephropathy (DN) and its influence on extracellular signal-regulated kinases 1/2 (ERK1/2) signaling were investigated. Male Wistar rats (n = 40) were randomly assigned to normal control, DN, low-dose sitagliptin intervention (ST1), or high-dose sitagliptin intervention (ST2) groups. Animals were euthanized after a 16-week treatment, and blood glucose (BG), glycosylated hemoglobin (HbA1c), urinary albumin excretion rate (AER), serum creatinine (Scr), creatinine clearance rate (Ccr), active glucagon-like peptide-1 (GLP-1) levels, kidney hypertrophy index, and renal pathohistology were determined...
2017: Pharmacology
https://www.readbyqxmd.com/read/28322944/new-insights-into-non-enzymatic-glycation-of-human-serum-albumin-biopolymer-a-study-to-unveil-its-impaired-structure-and-function
#14
Alok Raghav, Jamal Ahmad, Khursheed Alam, Asad U Khan
Albumin glycation and subsequent formation of advanced glycation end products (AGEs) correlate with diabetes and associated complications. Human Serum Albumin (HSA) was modified with d-glucose for a 40day period under sterile conditions at 37°C. Modified samples along with native HSA (unmodified) were analyzed for impairment in biochemical characteristics ((fructosamine, carbonyl, thiol, lysine, arginine, hydroxymethyl furfural [HMF] content), electrochemical (electrical conductance), simulated gastric fluid assay, simulated intestinal fluid assay, spectroscopic properties (UV, fluorescence), optical (surface contact angle) and fluid dynamics (viscosity and Stokes radius)...
August 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28280335/nanoparticle-abraxane-possesses-impaired-proliferation-in-a549-cells-due-to-the-underexpression-of-glucosamine-6-phosphate-n-acetyltransferase-1-gnpnat1-gna1
#15
Minzhi Zhao, Haiyun Li, Yan Ma, He Gong, Shu Yang, Qiaojun Fang, Zhiyuan Hu
Abraxane (Abr), a US Food and Drug Administration-approved albumin-bound nanoparticle applied for the treatment of non-small-cell lung cancer, has been reported to be more effective than paclitaxel (PTX). To further understand the molecular mechanisms that produce this superior drug efficacy of Abr, a quantitative proteomic approach has been applied to investigate the global protein expression profiles of lung cancer cell A549 treated with Abr and PTX. Only one protein, namely, glucosamine 6-phosphate N-acetyltransferase 1 (GNA1), showed significant differential expression (P<0...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28280052/cross-sectional-analysis-of-age-cml-srage-and-esrage-with-diabetes-and-cardiometabolic-risk-factors-in-a-community-based-cohort
#16
MULTICENTER STUDY
Stephanie J Loomis, Yuan Chen, David B Sacks, Eric S Christenson, Robert H Christenson, Casey M Rebholz, Elizabeth Selvin
BACKGROUND: Advanced glycation end products (AGEs) and their receptors are regarded as central to the development of diabetic complications, but associations with diabetes and cardiometabolic outcomes in previous studies are mixed. METHODS: Using ELISA assays, we measured N(6)-carboxymethyllysine (AGE-CML), soluble receptor for AGEs (sRAGE), and endogenous secreted receptor for AGEs (esRAGE) in 1874 participants from the Atherosclerosis Risk in Communities study...
May 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28270484/differences-in-incidence-of-diabetic-retinopathy-between-type-1-and-2-diabetes-mellitus-a-nine-year-follow-up-study
#17
Pedro Romero-Aroca, Raul Navarro-Gil, Aida Valls-Mateu, Ramon Sagarra-Alamo, Antonio Moreno-Ribas, Nuria Soler
BACKGROUND/AIMS: To determine the incidence of any diabetic retinopathy (any-DR), sight-threatening diabetic retinopathy (STDR) and diabetic macular oedema (DMO) and their risk factors in type 1 diabetes mellitus (T1DM) over a screening programme. METHODS: Nine-year follow-up, prospective population-based study of 366 patients with T1DM and 15 030 with T2DM. Epidemiological risk factors were as follows: current age, age at DM diagnosis, sex, type of DM, duration of DM, arterial hypertension, levels of glycosylated haemoglobin (HbA1c), triglycerides, cholesterol fractions, serum creatinine, estimated glomerular filtration rate (eGFR) and urine albumin to creatinine ratio (UACR)...
March 7, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28210565/label-free-proteome-analysis-of-plasma-from-patients-with-breast-cancer-stage-specific-protein-expression
#18
Marina Duarte Pinto Lobo, Frederico Bruno Mendes Batista Moreno, Gustavo Henrique Martins Ferreira Souza, Sara Maria Moreira Lima Verde, Renato de Azevedo Moreira, Ana Cristina de Oliveira Monteiro-Moreira
Breast cancer is one of the most commonly diagnosed types of cancer among women. Breast cancer mortality rates remain high probably because its diagnosis is hampered by inaccurate detection methods. Since changes in protein expression as well as modifications in protein glycosylation have been frequently reported in cancer development, the aim of this work was to study the differential expression as well as modifications of glycosylation of proteins from plasma of women with breast cancer at different stages of disease (n = 30) compared to healthy women (n = 10)...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28201997/the-association-between-interleukin-19-concentration-and-diabetic-nephropathy
#19
Li Li, Xu-Gan Jiang, Juan-Yu Hu, ZHeng-Qing Yu, Jian-Yong Xu, Fan Liu, Guang-Chun Zhao, Lei Zhang, Hui-Ming Gu, Si-Jing Zhang, Jin Meng
BACKGROUND: Interleukin-19 (IL-19) is a newly discovered cytokine belonging to the Interleukin-10(IL-10) family. IL-19 have indispensable functions in many inflammatory processes and also can induce the angiogenic potential of endothelial cells. The purpose of present study was to investigate the relation of serum interleukin-19 (IL-19) levels with diabetic nephropathy (DN). METHODS: Two hundred study groups of patients with type 2 diabetes mellitus (T2DM) (109 males and 91 females) were recruited, included normoalbuminuria(n = 102), microalbuminuria(n = 72) and macroalbuminuria(n = 26) ...
February 15, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28105260/shear-wave-elastography-in-hepatitis-c-patients-before-and-after-antiviral-therapy
#20
Toshikuni Suda, Osamu Okawa, Rion Masaoka, Yoshinori Gyotoku, Naohiko Tokutomi, Yasumi Katayama, Masaya Tamano
AIM: To investigate shear wave (SW) propagation velocity in patients with untreated hepatitis C and patients with sustained virological response (SVR). METHODS: A total of 136 hepatitis C patients [85 patients who had not received antiviral therapy (naïve group) and 51 patients who had received antiviral therapy and subsequently achieved SVR of at least 24 wk (SVR group)] and 58 healthy volunteers and outpatients without liver disease (control group) underwent evaluation of liver stiffness by SW elastography (SWE)...
January 8, 2017: World Journal of Hepatology
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