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https://www.readbyqxmd.com/read/29329709/characterization-of-singly-and-multiply-pegylated-insulin-isomers-by-reversed-phase-ultra-performance-liquid-chromatography-interfaced-with-ion-mobility-mass-spectrometry
#1
Selim Gerislioglu, Scott R Adams, Chrys Wesdemiotis
Conjugation of poly(ethylene glycol) (PEG) to protein drugs (PEGylation) is increasingly utilized in the biotherapeutics field because it improves significantly the drugs' circulatory half-life, solubility, and shelf-life. The activity of a PEGylated drug depends on the number, size, and location of the attached PEG chain(s). This study introduces a 2D separation approach, including reversed-phase ultra-performance liquid chromatography (RP-UPLC) and ion mobility mass spectrometry (IM-MS), in order to determine the structural properties of the conjugates, as demonstrated for a PEGylated insulin sample that was prepared by random amine PEGylation...
April 3, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29328881/factors-affecting-the-virological-response-among-chronic-hepatitis-c-virus-patients-in-yemen
#2
Zaid Mutahar Mohammed Alezzi, Ayman Yosry Abd El Rehim, Waleed Fouad Fathallah, Mansour Ali Alamrani, Fouad Hezam Othman
Hepatitis C virus (HCV) infection is increasingly seen as a major public health problem, threat, and concern worldwide. In Yemen about 1.7% of the population is infected with chronic hepatitis C. This study aimed to detect the predictors for response to pegylated interferon and ribavirin (Peg-IFN/RBV) in chronic HCV Yemeni patients. The study was conducted on 100 patients with chronic HCV who received Peg-IFN/RBV in the 48th Military Hospital in Sana'a Yemen, from 2011 to 2013. All patients were subjected to complete history taking, thorough clinical examinations, routine laboratory investigation, and abdominal ultrasonography...
January 2018: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/29325289/-optimal-treatment-regimen-for-patients-with-hbeag-positive-chronic-hepatitis-b-after-suboptimal-response-to-24-weeks-of-peg-ifn-%C3%AE-2a
#3
X D Luo, X P Chen, X F Chen
Objective: To investigate the optimal treatment regimen for patients with HBeAg-positive chronic hepatitis B (CHB) after suboptimal response to 24 weeks of pegylated interferon (Peg-IFN) α-2a. Methods: A total of 188 patients with HBeAg-positive CHB who had suboptimal response to 24 weeks of Peg-IFN α-2a were randomly divided into entecavir group (n = 93) and telbivudine group (n = 95). The two groups received entecavir 0.5 mg/d and telbivudine 0.6 g/d, respectively, for 208 weeks. After 208 weeks of treatment, the following indices were assessed: HBeAg clearance rate and seroconversion rate, hepatitis B virus (HBV) DNA clearance rate (HBV DNA < 500 IU/ml), safety, and drug resistance rate...
December 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29325276/-a-clinical-study-of-antiviral-therapy-for-patients-with-compensated-hepatitis-c-cirrhosis
#4
Z W Xie, J P Li, Y J Guan, X Y Zhang, F X Guo, B B Chen, Calvin Q Pan
Objective: To investigate the effect of antiviral therapy on the progression of liver cirrhosis and related predictive factors through a retrospective analysis of patients with compensated hepatitis C cirrhosis. Methods: The patients with compensated hepatitis C cirrhosis who were treated in our hospital from 2004 to 2015 were divided into sustained virologic response (SVR) group, non-SVR (NSVR) group, and untreated group. The baseline features of patients with or without liver cirrhosis were compared to identify the predictive factors for the progression of liver cirrhosis...
November 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29322302/the-superiority-of-sucrose-cushion-centrifugation-to-ultrafiltration-and-pegylation-in-generating-high-titer-lentivirus-particles-and-transducing-stem-cells-with-enhanced-efficiency
#5
Mahdi Eskandarian Boroujeni, Mossa Gardaneh
Viral gene delivery is hailed as a great milestone in gene-based therapeutic approaches. The human immunodeficiency virus-derived lentiviral vectors (LVs) are advantageous in infecting both dividing and non-dividing cells leading to continuous expression of transgenes. A variety of protocols are available for concentration of LVs. We primarily generated our internal ribosome entry site (IRES)-based LVs. Virus titration and transduction efficiency were compared between various strategies that included sucrose cushion centrifugation (SCC), protein column ultrafiltration and polyethylene glycol precipitation...
January 10, 2018: Molecular Biotechnology
https://www.readbyqxmd.com/read/29321547/polycythemia-vera-treatment-algorithm-2018
#6
REVIEW
Ayalew Tefferi, Alessandro M Vannucchi, Tiziano Barbui
Recently reported mature survival data have confirmed the favorable prognosis in polycythemia vera (PV), with an estimated median survival of 24 years, in patients younger than age 60 years old. Currently available drugs for PV have not been shown to prolong survival or alter the natural history of the disease and are instead indicated primarily for prevention of thrombosis. Unfortunately, study endpoints that are being utilized in currently ongoing clinical trials in PV do not necessarily target clinically or biologically relevant outcomes, such as thrombosis, survival, or morphologic remission, and are instead focused on components of disease palliation...
January 10, 2018: Blood Cancer Journal
https://www.readbyqxmd.com/read/29319069/utility-of-pegylated-dithiolane-ligands-for-direct-synthesis-of-water-soluble-au-ag-pt-pd-cu-and-aupt-nanoparticles
#7
Eunkeu Oh, James B Delehanty, Christopher A Klug, Kimihiro Susumu, W Russ Algar, Ramasis Goswami, Igor L Medintz
Water soluble metallic nanoparticles are being developed for a variety of roles ranging from catalysis to drug delivery and as potential contrast agents. We demonstrate direct synthesis of high-quality water-soluble Au, Ag, Pt, Pd, Cu and alloyed AuPt nanoparticles as well as ligand-exchange of FePt, cubic Pt and Au/Pt core/shell nanoparticles using bidentate dithiolane PEG as a universal ligand. Simple chemistry can greatly expand the applications of metal nanoparticles.
January 10, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29316059/cost-effectiveness-analyses-of-anti-hcv-treatments-using-qol-scoring-among-patients-with-chronic-liver-disease-in-the-hiroshima-prefecture
#8
Terumi Kaishima, Tomoyuki Akita, Masayuki Ohisa, Kazuaki Sakamune, Akemi Kurisu, Aya Sugiyama, Hiroshi Aikata, Kazuaki Cyayama, Junko Tanaka
AIM: We estimated the cost-effectiveness of direct acting antiviral treatment (DAA) compared to triple therapy (simeprevir, pegylated interferon-α and ribavirin) (scenario-1) and Peg-IFN+RBV(scenario-2) and non-antiviral therapy(scenario-3). METHODS: The Cost-effectiveness was evaluated as incremental cost-effectiveness ratios (ICERs) using direct costs and indirect costs which included loss of wages during the patient's lifetime due to early death caused by viral hepatitis infection...
January 5, 2018: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29316039/treatment-of-hcv-infection-in-poland-at-the-beginning-of-the-interferon-free-era-the-epiter-2-study
#9
Robert Flisiak, Dorota Zarębska-Michaluk, Ewa Janczewska, Agnieszka Staniaszek, Andrzej Gietka, Włodzimierz Mazur, Magdalena Tudrujek, Krzysztof Tomasiewicz, Teresa Belica-Wdowik, Barbara Baka-Ćwierz, Dorota Dybowska, Waldemar Halota, Beata Lorenc, Marek Sitko, Aleksander Garlicki, Hanna Berak, Andrzej Horban, Iwona Orłowska, Krzysztof Simon, Łukasz Socha, Marta Wawrzynowicz-Syczewska, Jerzy Jaroszewicz, Zbigniew Deroń, Agnieszka Czauż-Andrzejuk, Jolanta Citko, Rafał Krygier, Anna Piekarska, Łukasz Laurans, Witold Dobracki, Jolanta Białkowska, Olga Tronina, Małgorzata Pawłowska
The aim of the EpiTer-2 study was to analyze patient characteristics and their medication for HCV infection in Poland at the beginning of the interferon-free era. Analysis of data of HCV infected patients treated during the initial period of availability of interferon-free regimens in Poland, who started therapy after 1 July 2015 and had available an efficacy evaluation report before 30 June 2017 was undertaken. A total of 2879 patients with chronic hepatitis C were entered, including 46% with liver cirrhosis...
January 6, 2018: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29314573/higher-efficacy-of-pegylated-interferon-alpha-2b-add-on-therapy-in-hbeag-positive-chronic-hepatitis-b-patients-on-tenofovir-monotherapy
#10
Ankur Jindal, Ashish Kumar Vyas, Devesh Kumar, Guresh Kumar, Manoj Kumar Sharma, Shiv Kumar Sarin
BACKGROUND: Monotherapy with Peg-IFNα or nucleos(t)ide analogues(NA) currently approved for treating chronic hepatitis B(CHB) have limited efficacy. Studies on combination of Peg-IFN-α/NA have shown conflicting results. We investigated whether sequential adding-on Peg-IFNα to tenofovir enhances serological response rates. METHODS: Treatment naïve, HBeAg-positive CHB patients with moderately elevated ALT(48 to 200IU/mL) were started on tenofovir(300 mg/day) and enrolled at week 12 in 1:1 ratio to either receive Peg-IFNα2b add-on(1...
January 4, 2018: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29314465/sequential-therapy-involving-an-early-switch-from-entecavir-to-pegylated-interferon-%C3%AE-in-japanese-patients-with-chronic-hepatitis-b
#11
Masaru Enomoto, Shuhei Nishiguchi, Akihiro Tamori, Ritsuzo Kozuka, Hideki Fujii, Sawako Uchida-Kobayashi, Shinya Fukunishi, Yasuhiro Tsuda, Kazuhide Higuchi, Masaki Saito, Hirayuki Enomoto, Norifumi Kawada
AIM: The optimal combination of the two currently available agents with different mechanisms of action, a nucleos(t)ide analog and pegylated interferon-α (PegIFNα), must be determined to improve treatment of chronic hepatitis B. METHODS: In this study, 24 patients with chronic hepatitis B (14 hepatitis B e-antigen [HBeAg]-positive and 10 HBeAg-negative) received entecavir for 36-52 weeks, followed by entecavir plus PegIFNα-2a for 4 weeks and finally by PegIFNα-2a alone for 44 weeks...
January 4, 2018: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/29305923/junction-opener-protein-increases-nanoparticle-accumulation-in-solid-tumors
#12
Christine E Wang, Roma C Yumul, Jonathan Lin, Yilong Cheng, André Lieber, Suzie H Pun
Carcinomas contain tight junctions that can limit the penetration and therefore therapeutic efficacy of anticancer agents, especially those delivered by nano-carrier systems. The junction opener (JO) protein is a virus-derived protein that can transiently open intercellular junctions in epithelial tumors by cleaving the junction protein desmoglein-2 (DSG2). Co-administration of JO was previously shown to significantly increase the efficacy of various monoclonal antibodies and chemotherapy drugs in murine tumor models by allowing for increased intratumoral penetration of the drugs...
January 3, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29305921/distribution-of-therapeutic-proteins-into-thoracic-lymph-after-intravenous-administration-is-protein-size-dependent-and-primarily-occurs-within-the-liver-and-mesentery
#13
Preeti Yadav, Victoria M McLeod, Cameron J Nowell, Laura I Selby, Angus P R Johnston, Lisa M Kaminskas, Natalie L Trevaskis
Therapeutic proteins can facilitate the targeting and treatment of lymphatic diseases (such as cancer metastases, infections and inflammatory diseases) since they are cleared via the lymphatics following interstitial (SC or IM) administration. However, therapeutic proteins are often administered intravenously (IV). Recently therapeutic proteins have been found to access the thoracic lymph in surprisingly high quantities after IV administration. The aim of this study was to determine, for the first time, the major sites of thoracic lymph access of therapeutic proteins, and the protein properties that enhance lymph access, after IV administration...
January 3, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29303196/biodegradable-moox-nanoparticles-with-efficient-near-infrared-photothermal-and-photodynamic-synergetic-cancer-therapy-at-the-second-biological-window
#14
Wenyan Yin, Tao Bao, Xiao Zhang, Qin Gao, Jie Yu, Xinghua Dong, Liang Yan, Zhanjun Gu, Yuliang Zhao
Near-infrared (NIR) laser induced phototherapy has been considered as a noninvasive option for cancer therapy. Herein, we report plasmonic PEGylated molybdenum oxide nanoparticles (PEG-MoOx NPs) that were synthesized by using a facile hydrothermal method. The PEG-MoOx NPs exhibit broad absorption at the NIR biological window and remarkable photothermal conversion ability in the first (808 nm) and the second (1064 nm) windows. Moreover, the biocompatible PEG-MoOx NPs exhibit effective cellular uptake and could be eliminated gradually from the liver and spleen in mice...
January 5, 2018: Nanoscale
https://www.readbyqxmd.com/read/29301580/pharmacokinetics-comparison-of-two-pegylated-interferon-alfa-formulations-in-healthy-volunteers
#15
Marisa Boff Costa, Paulo Dornelles Picon, Guilherme Becker Sander, Hugo Nodarse Cuni, Carmen Valenzuela Silva, Rolando Páez Meireles, Ana Carolina Magalhães Andrade Góes, Nadia Maria Batoreu, Maria de Lourdes de Sousa Maia, Elizabeth Maciel Albuquerque, Denise Cristina de Souza Matos, Pedro Lopez Saura
BACKGROUND: Several countries have used pegylation technology to improve the pharmacokinetic properties of essential drugs. Recently, a novel interferon alfa-2b protein conjugated to four-branched 12 kDa polyethylene glycol molecules was developed jointly between Cuba and Brazil. The aim of this study was to compare the pharmacokinetic properties of BIP48 (pegylated interferon alfa-2b from Bio-Manguinhos/Fiocruz, Brazil) to those of PEGASYS® (commercially available pegylated interferon alfa-2a from Roche Pharmaceutical)...
January 4, 2018: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29299917/near-infrared-cyanine-loaded-liposome-like-nanocapsules-of-camptothecin-floxuridine-conjugate-for-enhanced-chemophotothermal-combination-cancer-therapy
#16
Chuang Gao, Xiaolong Liang, Shanyan Mo, Nisi Zhang, Desheng Sun, Zhifei Dai
A dual-in-dual synergistic strategy was proposed based on the self-assembly of combinatorial nanocapsules (NCs) from Janus camptothecin-floxuridine (CF) conjugate and near infrared absorber of 1,1'-dioctadecyl-3,3,3',3'-tetramethylindotricarbocyanine iodide (DiR) by introducing PEGylated phospholipid of DSPE-PEG2000 to help NCs escape the rapid clearance from the bloodstream. Due to the use of amphiphilic CF and DiR themselves to form liposome-like nanocapsules, the obtained CF-DiR NCs owned significantly high loading content, stable co-delivery drug combinations, no premature release and excellent photothermal conversion efficiency...
January 4, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29298688/enhanced-response-rate-to-pegylated-liposomal-doxorubicin-in-high-grade-serous-ovarian-carcinomas-harbouring-brca1-and-brca2-aberrations
#17
Robert L Hollis, Alison M Meynert, Michael Churchman, Tzyvia Rye, Melanie Mackean, Fiona Nussey, Mark J Arends, Andrew H Sims, Colin A Semple, C Simon Herrington, Charlie Gourley
BACKGROUND: Approximately 10-15% of ovarian carcinomas (OC) are attributed to inherited susceptibility, the majority of which are due to mutations in BRCA1 or BRCA2 (BRCA1/2). These patients display superior clinical outcome, including enhanced sensitivity to platinum-based chemotherapy. Here, we seek to investigate whether BRCA1/2 status influences the response rate to single-agent pegylated liposomal doxorubicin (PLD) in high grade serous (HGS) OC. METHODS: One hundred and forty-eight patients treated with single-agent PLD were identified retrospectively from the Edinburgh Ovarian Cancer Database...
January 3, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29298535/multimethod-assessment-of-baseline-depression-and-relationship-to-hepatitis-c-treatment-discontinuation
#18
Jeffrey J Weiss, Sarah Prieto, Norbert Bräu, Douglas T Dieterich, Sue M Marcus, Alicia Stivala, Jack M Gorman
Objective The primary study objective is to determine which measures of depression are associated with early discontinuation of hepatitis C virus infection treatment and to determine which measure best characterizes the depression that develops during treatment. Methods Seventy-eight treatment-naïve subjects who initiated pegylated interferon/ribavirin treatment for hepatitis C virus infection were included. Baseline depression was assessed with the Structured Interview for the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV), the Hamilton Depression Rating Scale, and the Beck Depression Inventory-II...
January 1, 2018: International Journal of Psychiatry in Medicine
https://www.readbyqxmd.com/read/29298046/conjugation-with-eight-arm-peg-markedly-improves-the-in-vitro-activity-and-prolongs-the-blood-circulation-of-staphylokinase
#19
Fangbing Qi, Chunyang Hu, Weili Yu, Tao Hu
Staphylokinase (SAK) is a profibrinolytic protein and can be used for therapy of acute myocardial infarction and coronary thrombosis. However, SAK suffers from a short serum half-life time (~6 min) that limits its clinical application. PEGylation prolongs the half-life time of SAK, whereas significantly decreases the bioactivity of SAK for the steric shielding effect of PEG. To improve the bioactivity and prolong the half-life time of SAK, 8-arm PEG maleimide (8-arm PEG) was used for conjugation of multiple SAK molecules in one entity...
January 3, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29297946/synthesis-of-pegylated-semiconducting-polymer-amphiphiles-for-molecular-photoacoustic-imaging-and-guided-therapy
#20
Chen Xie, Penghui Cheng, Kanyi Pu
Semiconducting polymer nanoparticles (SPNs) have been used as a new class of photonic materials with great potential in biomedical applications, but their synthetic method is limited to nanoprecipitation. Semiconducting polymer amphiphiles (SPAs) which can spontaneously self-assemble into nanoparticles are ideal alternatives for SPNs. Depending on their backbone structures, SPAs with different optical properties can be developed into nanoprobes for molecular imaging applications such as photoacoustic (PA) and fluorescence imaging as well as photothermal therapy...
January 3, 2018: Chemistry: a European Journal
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