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https://www.readbyqxmd.com/read/28929019/heterologous-expression-of-plasmodium-vivax-apical-membrane-antigen-1-pvama1-for-binding-peptide-selection
#1
Ching Hoong Chew, Yvonne Ai Lian Lim, Kek Heng Chua
BACKGROUND: Plasmodium is an obligate intracellular parasite. Apical membrane antigen 1 (AMA1) is the most prominent and well characterized malarial surface antigen that is essential for parasite-host cell invasion, i.e., for sporozoite to invade and replicate within hepatocytes in the liver stage and merozoite to penetrate and replicate within erythrocytes in the blood stage. AMA1 has long served as a potent antimalarial drug target and is a pivotal vaccine candidate. A good understanding of the structure and molecular function of this Plasmodium protein, particularly its involvement in host-cell adhesion and invasion, is of great interest and hence it offers an attractive target for the development of novel therapeutics...
2017: PeerJ
https://www.readbyqxmd.com/read/28924630/role-of-in-vitro-release-methods-in-liposomal-formulation-development-challenges-and-regulatory-perspective
#2
Deepak Solomon, Nilesh Gupta, Nihal S Mulla, Snehal Shukla, Yadir A Guerrero, Vivek Gupta
In the past few years, measurement of drug release from pharmaceutical dosage forms has been a focus of extensive research because the release profile obtained in vitro can give an indication of the drug's performance in vivo. Currently, there are no compendial in vitro release methods designed for liposomes owing to a range of experimental challenges, which has created a major hurdle for both development and regulatory acceptance of liposome-based drug products. In this paper, we review the current techniques that are most often used to assess in vitro drug release from liposomal products; these include the membrane diffusion techniques (dialysis, reverse dialysis, fractional dialysis, and microdialysis), the sample-and-separate approach, the in situ method, the continuous flow, and the modified United States Pharmacopeia methods (USP I and USP IV)...
September 18, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28923834/is-chronic-dialysis-the-right-hard-renal-end-point-to-evaluate-renoprotective-drug-effects
#3
Misghina Weldegiorgis, Dick de Zeeuw, Jamie P Dwyer, Peter Mol, Hiddo J L Heerspink
BACKGROUND AND OBJECTIVES: RRT and doubling of serum creatinine are considered the objective hard end points in nephrology intervention trials. Because both are assumed to reflect changes in the filtration capacity of the kidney, drug effects, if present, are attributed to kidney protection. However, decisions to start RRT are not only on the basis of filtration capacity of the kidney, but also on other factors. We therefore compared the time to RRT with the time to a fixed eGFR threshold and assessed the effect of the renoprotective drug irbesartan on both components...
September 18, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28923348/stimulation-of-accumbal-gabaa-receptors-inhibits-delta2-but-not-delta1-opioid-receptor-mediated-dopamine-efflux-in-the-nucleus-accumbens-of-freely-moving-rats
#4
Yuri Aono, Yuri Kiguchi, Yuriko Watanabe, John L Waddington, Tadashi Saigusa
The nucleus accumbens contains delta-opioid receptors that may reduce inhibitory neurotransmission. Reduction in GABAA receptor-mediated inhibition of accumbal dopamine release due to delta-opioid receptor activation should be suppressed by stimulating accumbal GABAA receptors. As delta-opioid receptors are divided into delta2- and delta1-opioid receptors, we analysed the effects of the GABAA receptor agonist muscimol on delta2- and delta1-opioid receptor-mediated accumbal dopamine efflux in freely moving rats using in vivo microdialysis...
September 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28920493/construction-and-evaluation-in-vitro-and-in-vivo-of-tedizolid-phosphate-loaded-cationic-liposomes
#5
Zhenlei Yang, Liu Tian, Jingjing Liu, Guihua Huang
Firstly, The SA-TDZA-Lips were prepared by reverse-phase evaporation method. Then, the drug release behavior was evaluated by dynamic membrane dialysis in vitro and the preliminary safety was evaluated by hemolysis method. Finally, with Tedizolid phosphate injection (TDZA-Inj) and tedizolid phosphate loaded liposomes (TDZA-Lips) as the control groups, the pharmacokinetic characteristic and tissues distribution of SA-TDZA-Lips were evaluated after intravenous injection. As a result, the stearylamine modified tedizolid phosphate liposomal delivery system was constructed successfully and the particle size was (194...
September 18, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28918956/healthcare-utilization-and-expenditures-for-united-states-medicare-beneficiaries-with-systemic-vasculitis
#6
Carolyn T Thorpe, Joshua M Thorpe, Tao Jiang, Dylan Atkinson, Yihuang Kang, Loren J Schleiden, Delesha M Carpenter, Julie Anne G McGregor, Susan L Hogan
OBJECTIVE: The Medicare federal insurance program is the most common United States insurer of patients with systemic vasculitis (SV). We compared healthcare utilization and expenditures for Medicare beneficiaries with versus without SV. METHODS: This national, retrospective study used 2010 claims and enrollment data for a 100% cohort of Medicare Part A and B beneficiaries with ≥1 claim including a diagnosis for a form of SV (n = 176,498), and a randomly selected group of non-SV beneficiaries (n = 46,561)...
August 10, 2017: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/28917533/nanoparticles-of-a-polyaspartamide-based-brush-copolymer-for-modified-release-of-sorafenib-in-vitro-and-in-vivo-evaluation
#7
Melchiorre Cervello, Giovanna Pitarresi, Antonella Bavuso Volpe, Barbara Porsio, Daniele Balasus, Maria Rita Emma, Antonina Azzolina, Roberto Puleio, Guido Ruggero Loria, Stefano Puleo, Gaetano Giammona
In this paper, we describe the preparation of polymeric nanoparticles (NPs) loaded with sorafenib for the treatment of hepatocellular carcinoma (HCC). A synthetic brush copolymer, named PHEA-BIB-ButMA (PBB), was synthesized by Atom Trasnfer Radical Polymerization (ATRP) starting from the α-poly(N-2-hydroxyethyl)-d,l-aspartamide (PHEA) and poly butyl methacrylate (ButMA). Empty and sorafenib loaded PBB NPs were, then, produced by using a dialysis method and showed spherical morphology, colloidal size, negative ζ potential and the ability to allow a sustained sorafenib release in physiological environment...
September 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28915510/drug-eluting-vs-bare-metal-stents-in-patients-with-chronic-kidney-disease-and-coronary-artery-disease-insights-from-a-systematic-review-and-meta-analysis
#8
Alexander Volodarskiy, Sunil Kumar, Radoslaw Pracon, Mandeep Sidhu, Evgeny Kretov, Tomasz Mazurek, Olga Bockeria, Upendra Kaul, Sripal Bangalore
BACKGROUND: Most drug-eluting stent (DES) trials have excluded patients with chronic kidney disease (CKD). The efficacy of DES implantation in patients with CKD is therefore not known. OBJECTIVES: To evaluate the outcomes with DES vs bare-metal stent (BMS) implantation in patients with CKD. METHODS AND RESULTS: MEDLINE, EMBASE, and CENTRAL were searched for studies including at least 100 patients with CKD (estimated glomerular filtration rate ≤60 mL/min/1...
September 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28913392/data-on-scaling-up-and-in-vivo-human-study-of-progesterone-lipid-nanoparticles
#9
Elisabetta Esposito, Maddalena Sguizzato, Markus Drechsler, Paolo Mariani, Federica Carducci, Claudio Nastruzzi, Rita Cortesi
Progesterone containing nanoparticles constituted of tristearin or tristearin in association with caprylic-capric triglyceride were produced in a lab scale by ultrasound homogenization and in a pilot scale by high pressure homogenization. A study was conducted to select the pressure to be used in order to obtain homogenously sized nanoparticles. The Dialysis method was performed to mimic subcutaneous administration of lipid nanoparticles. Mathematical analyses of the results were conducted to understand and compare the drug release mechanisms...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28910791/inflammation-and-protein-energy-wasting-in-the-uremic-milieu
#10
Magdalena Jankowska, Gabriela Cobo, Bengt Lindholm, Peter Stenvinkel
Inflammation is normally a protective and physiological response to harmful stimuli, but typically becomes an uncontrolled, maladaptive, and persistent process in patients with end-stage renal disease (ESRD). Through a deleterious cascade of poorly controlled reactions mediated by biologically active molecules (also called middle molecular weight uremia retention solutes), inflammation associates with a range of complications including cardiovascular disease and protein-energy wasting (PEW). Persistent inflammation, which is central to the conceptual etiological models of PEW and the malnutrition, inflammation, and atherosclerosis syndrome, induces and reignites processes leading to PEW in a number of ways including stimulation of both direct and indirect mechanisms of muscle proteolysis...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28902231/risk-factors-for-the-progression-of-chronic-kidney-disease-after-acute-kidney-injury
#11
Benedito Jorge Pereira, Silvana Barreto, Thais Gentil, Larissa S Assis, Emília Md Soeiro, Isac de Castro, Sandra M Laranja
Introduction: The incidence of chronic kidney disease (CKD) is increasing with the increasing age of the population and the increasing number of elderly survivors of acute kidney injury (AKI). The risk factors for the progression of CKD after AKI are unclear. Objective: To investigate the association between AKI and its progression to CKD and the risk factors involved. Methods: An observational, retrospective study of AKI patients followed from 2009 to 2012 was carried out...
August 28, 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/28900759/efficacy-and-safety-of-sevelamer-carbonate-in-hyperphosphatemic-pediatric-patients-with-chronic-kidney-disease
#12
Sahar Fathallah-Shaykh, Dorota Drozdz, Joseph Flynn, Randall Jenkins, Katherine Wesseling-Perry, Sarah J Swartz, Craig Wong, Beverly Accomando, Gerald F Cox, Bradley A Warady
BACKGROUND: Treatment for hyperphosphatemia in chronic kidney disease (CKD) involves dietary control of phosphorus intake, dialysis, and treatment with oral phosphate binders, none of which were approved by the Federal Food and Drug Administration in pediatric patients at the time of this study. METHODS: This was a phase 2, multicenter study (NCT01574326) with a 2-week, randomized, placebo-controlled, fixed-dose period (FDP) followed by a 6-month, single-arm, open-label, dose-titration period (DTP), with the aim to evaluate the safety and efficacy of sevelamer carbonate (SC) in hyperphosphatemic pediatric patients with CKD...
September 12, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28888849/outcomes-in-non-metastatic-extremity-osteosarcoma-treatment-naive-patients-treated-with-a-novel-non-high-dose-methotrexate-based-dose-dense-combination-chemotherapy-regimen-ogs-12
#13
Jyoti Bajpai, Arun Chandrasekharan, Vikas Talreja, Vijai Simha, M V Chandrakanth, Bharat Rekhi, Sachin Khurana, Arif Khan, Tushar Vora, Jaya Ghosh, Shripad D Banavali, Sudeep Gupta
PURPOSE: High-dose methotrexate (HDMTX)-based regimens are widely used in osteosarcoma. However, mandatory in-patient treatment with complex pharmacokinetic monitoring requirement precludes its use, especially in resource-constrained settings of low- and middle-income countries (LMICs). METHODS: All treatment naive consecutive patients of osteosarcoma were prospectively treated on a novel institutional regimen (named OGS-12) comprising of eight sequential doublets of the following drugs: doxorubicin, cisplatin and ifosfamide in four courses each, given in the neoadjuvant and adjuvant settings...
September 7, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28882165/successful-treatment-of-acute-renal-failure-secondary-to-complicated-infective-endocarditis-by-peritoneal-dialysis-a-case-report
#14
Aisha M Al-Osail, Ibrahim M Al-Zahrani, Abdullah A Al-Abdulwahab, Sarah M Alhajri, Emad M Al-Osail, Abdullah K Al-Hwiesh, Fahad A Al-Muhanna
BACKGROUND: Infective endocarditis is one of the most common infections among intravenous drug addicts. Its complications can affect many systems, and these can include acute renal failure. There is a scarcity of cases in the literature related to acute renal failure secondary to infective endocarditis treated with peritoneal dialysis. In this paper, the case of a 48-year-old Saudi male is reported, who presented with features suggestive of infective endocarditis and who developed acute kidney injury that was treated successfully with high tidal volume automated peritoneal dialysis...
September 7, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28881095/albumin-assisted-method-allows-assessment-of-release-of-hydrophobic-drugs-from-nanocarriers
#15
Dmitry Gil, Anastasia Frank-Kamenetskii, John Barry, Vladimir Reukov, Yun Xiang, Arabinda Das, Abhay K Varma, Mark S Kindy, Naren L Banik, Alexey Vertegel
Polymeric nanoparticles have been extensively studied as drug delivery vehicles both in vitro and in vivo for the last two decades. In vitro methods to assess drug release profiles usually utilize degradation of nanoparticles in aqueous medium, followed by the measurement of the concentration of the released drug. This method, however, is difficult to use for drugs that are poorly water soluble. In this study, we describe a protocol for measuring drug release kinetic using albumin solution as the medium. Albumin is a major blood transport protein, which mediates transport of many lipid soluble compounds including fatty acids, hormones, and bilirubin...
September 7, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28877127/renal-transplant-recipients-the-factors-related-to-immunosuppressive-medication-adherence-based-on-the-health-belief-model
#16
Pen-Chen Kung, Mei Chang Yeh, Ming-Kuen Lai, Hsueh-Erh Liu
BACKGROUND: Kidney transplant failures are caused primarily by lack of adherence to immunosuppressive medication regimens by patients after transplantation. A number of studies have indicated that health-related beliefs are an effective predictor of health-related behavior. PURPOSE: The aim of this study is to understand the influence of the personal characteristics and health-related beliefs of patients on adherence to treatment with immunosuppressive medication based on the Health Belief Model...
October 2017: Journal of Nursing Research: JNR
https://www.readbyqxmd.com/read/28874122/doxycycline-treatment-in-dialysis-related-amyloidosis-discrepancy-between-antalgic-effect-and-inflammation-studied-with-fdg-positron-emission-tomography-a-case-report
#17
Giorgina Barbara Piccoli, Mammar Hachemi, Ida Molfino, Jean Philippe Coindre, Charles Boursot
BACKGROUND: No effective treatment is currently available and dialysis related amyloidosis continues to be invalidating in long-term dialysis patients. A recent case series reported reduction of osteoarticular pain on doxycycline treatment, extending the indications of this drug, used in other uncommon forms of amyloidosis, to dialysis patients. Explanations of the antalgic effect were the anti-inflammatory properties and anti-coiling effects of tetracycline. CASE PRESENTATION: Our report regards a 54-year-old woman, who was never transplanted and has been on hemodialysis and hemodiafiltration for overall 37 years, due to renal hypoplasia...
September 6, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28873458/anti-fibrotic-effects-of-valproic-acid-in-experimental-peritoneal-fibrosis
#18
Elerson C Costalonga, Luiza J de Freitas, Deise da S P Aragone, Filipe M O Silva, Irene L Noronha
BACKGROUND: Progressive fibrous thickening of the peritoneal membrane is a complication of long-term peritoneal dialysis (PD). TGF-β/Smad pathway activation, inflammation, and neoangiogenesis play important roles in peritoneal membrane (PM) changes induced by PD. Recently, histone deacetilase inhibitors (HDACi) have shown anti-fibrotic and anti-inflammatory effects in different experimental models. These drugs prevent deacetylation of histones causing a loosen chromatin, which in turn induce the expression of some anti-fibrotic genes...
2017: PloS One
https://www.readbyqxmd.com/read/28870161/chronic-dialysis-nat2-polymorphisms-and-the-risk-of-isoniazid-induced-encephalopathy-case-report-and-literature-review
#19
Stefan Matei Constantinescu, Benoit Buysschaert, Vincent Haufroid, Franck Broly, Michel Jadoul, Johann Morelle
BACKGROUND: Isoniazid is the most widely used anti-tuberculosis agent, yet it may lead to life-threatening complications. CASE PRESENTATION: Here we report the case of a chronic hemodialysis patient who developed severe encephalopathy after the start of isoniazid. Blood levels of isoniazid were elevated, and acetyl-isoniazid over isoniazid ratio was decreased 3 h after intake of the medication, suggesting that a slow acetylator phenotype may have contributed to drug toxicity, in addition to pyridoxal phosphate removal by dialysis...
September 4, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28869937/prospects-for-vascular-access-education-in-developing-countries-current-situation-in-cambodia
#20
Toshihide Naganuma, Yoshiaki Takemoto
We report our activities training doctors on vascular access procedures at International University (IU) Hospital in Cambodia through a program facilitated by Ubiquitous Blood Purification International, a nonprofit organization that provides medical support to developing countries in the field of dialysis medicine. Six doctors from Japan have been involved in the education of medical personnel at IU, and we have collectively visited Cambodia about 15 times from 2010 to 2016. In these visits, we have performed many operations, including 42 for arteriovenous fistula, 1 arteriovenous graft, and 1 percutaneous transluminal angioplasty...
2017: Blood Purification
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