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Blood purification

Shijie Li, Linlin Li, Zhuo Chen, Guangpu Xue, Longguang Jiang, Ke Zheng, Jincan Chen, Rui Li, Cai Yuan, Mingdong Huang
Plasma-derived human serum albumin (pHSA) has important applications in many clinical indications, including blood loss, serious burn, or hemorrhagic shock. The limited supply and potential infectious pathogen contamination of pHSA have stimulated the development of recombinant human serum albumin (rHSA). However, rHSA often entraps endogenous or exogenous impurities, including color pigments and polysaccharides. Therefore, the purification of rHSA to high purity remains the bottleneck in large-scale production of rHSA...
April 17, 2018: Protein Expression and Purification
Nicholas E Long, Brandon J Sullivan, Haiming Ding, Stephanie R Doll, Michael A Ryan, Charles L Hitchcock, Edward W Martin, Krishan Kumar, Michael F Tweedle, Thomas J Magliery
Antibody (Ab) fragments have great clinical potential as cancer therapeutics and diagnostics. Their small size allows for fast clearance from blood, low immunoreactivity, better tumor penetration, and simpler engineering and production. The smallest fragment derived from a full-length IgG that retains binding to its antigen, the single-chain variable fragment (scFV), is engineered by fusing the variable light and variable heavy domains with a peptide linker. Along with switching the domain orientation, altering the length and amino acid sequence of the linker can significantly affect scFV binding, stability, quaternary structure, and other biophysical properties...
April 18, 2018: Journal of Biological Chemistry
Can Xu, Ningbo Qin, Chunyan Yan, Shumei Wang
The root of Pueraria lobata is considered to be a medicinal and edible herb for the treatment of diabetes, and it has a long history of application in China. To explore the constituents responsible for the anti-hyperglycemic activities of P. lobata, a water-soluble polysaccharide (PL70-1-1) was isolated and purified by using a DEAE-Cellulose 52 anion exchange column and a Sephacryl S-100 gel filtration column. Its molecular weight (2584 Da) was determined by high performance gel permeation chromatography (HPGPC)...
April 18, 2018: Food & Function
Juan-Juan Chen, Si-Yong Huang, Peng-Fei Ma, Bi-Jia Wu, Si-Lang Zhou, Yong-Xing Zhao, Jun-Mei Gong, Ying-Min Liang
OBJECTIVE: To express and purify the mouse endothelial cell-targeted recombinant Notch ligand protein mD1R, and to investigate its effect on hematopoiesis after carbon tetrachloride damage. METHODS: PCR was performed to clone and construct the expression vector pET22b(+)-mD1R. The mD1R successfully transformed into E. coli was induced by IPTG, and purified with Ni2+ -beads affinity chromatography. The target protein was detected by SDS-PAGE. The fluorescence-activated cell sorting analysis (FACS), cell adhesion test, immunofluorescence staining and quantitative real-time PCR were employed to detect the endothelial cell-targeted and Notch signaling-activated biological characteristics of mD1R...
April 2018: Zhongguo Shi Yan Xue Ye Xue za Zhi
Ayse Akcan Arikan, Poyyapakkam Srivaths, Ryan W Himes, Naile Tufan Pekkucuksen, Fong Lam, Trung Nguyen, Tamir Miloh, Michael Braun, John Goss, Moreshwar S Desai
OBJECTIVES: Standard intensive care treatment is inadequate to keep children with liver failure alive without catastrophic complications to ensure successful transplant, as accumulation of endogenous protein-bound toxins often lead to hepatic encephalopathy, hepatorenal syndrome, cardiovascular instability, and multiple organ failure. Given paucity of proven treatment modalities for liver failure, blood purification using different extracorporeal treatments as a bridge to transplantation is used, but studies evaluating the safety and efficacy of combination of these therapies, especially in pediatric liver failure, are lacking...
April 12, 2018: Pediatric Critical Care Medicine
Takashi Temma, Naoya Kondo, Keiko Yoda, Kantaro Nishigori, Satoru Onoe, Masashi Shiomi, Masahiro Ono, Hideo Saji
OBJECTIVE: Oxidized low-density lipoprotein (OxLDL) plays a pivotal role in atherosclerotic plaque destabilization, which suggests its potential as a nuclear medical imaging target. We previously developed radioiodinated 125 I-AHP7, a peptide probe carrying a 7-residue sequence from the OxLDL-binding protein Asp-hemolysin, for specific OxLDL imaging. Although 125 I-AHP7 recognized OxLDL, it had low stability. Thus, to improve stability, we designed radiolabeled 22-residue peptide probes, 125 I-AHP22 and 111 In-AHP22, which include the entire AHP7 sequence, and evaluated the stability, activity, and applications of these probes in vitro and in vivo...
April 12, 2018: Annals of Nuclear Medicine
Andreas C Boukis, Kevin Reiter, Maximiliane Frölich, Dennis Hofheinz, Michael A R Meier
A convenient and inherently more secure communication channel for encoding messages via specifically designed molecular keys is introduced by combining advanced encryption standard cryptography with molecular steganography. The necessary molecular keys require large structural diversity, thus suggesting the application of multicomponent reactions. Herein, the Ugi four-component reaction of perfluorinated acids is utilized to establish an exemplary database consisting of 130 commercially available components...
April 12, 2018: Nature Communications
Xiao-Fang Gao, Jian-Dong Li, Li Guo, Shan-Shan Guo, Ran Zhang, Yan-Li Gou, Hang Chen
OBJECTIVE: This study aims to investigate the effects of hybrid blood purification treatment on secondary hyperparathyroidism for maintenance hemodialysis (HD) patients. METHODS: A total of 40 patients were randomly divided into 2 groups: HD combined with hemoperfusion (HD + HP) group (n = 20) and HD group (n = 20). Changes in intact parathyroid hormone (iPTH) in these 2 groups were compared before and after treatment, and iPTH levels in the HD + HP group were monitored before and after treatment...
April 12, 2018: Blood Purification
Margaret L Thomas, Paola Marcato
Aberrant epigenetic modifications are an early event in carcinogenesis, with the epigenetic landscape continuing to change during tumor progression and metastasis-these observations suggest that specific epigenetic modifications could be used as diagnostic and prognostic biomarkers for many cancer types. DNA methylation, post-translational histone modifications, and non-coding RNAs are all dysregulated in cancer and are detectable to various degrees in liquid biopsies such as sputum, urine, stool, and blood...
April 1, 2018: Cancers
T Sun, Y Q Ren, F Wang, H J Miao, Y J Shan, C X Wang, Y C Zhang
Objective: To investigate the incidence and prognosis of hypophosphatemia in critically ill children treated with continuous blood purification (CBP). Methods: The medical records of the critically ill patients, who were treated with CBP, admitted to pediatric intensive care unit (PICU) of Shanghai Children's Hospital from May 2014 to April 2017 were retrospectively analyzed. The serum phosphorus levels were tested before CBP, at 48-72 h during CBP, at the end of CBP and on the next day after CBP finished. Phosphorus supplement was given to the children with severe hypophosphatemia...
April 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
San Jun Guo, Shan Ren, Yong En Xie
Acinetobacter baumannii (A. Baumannii) is an emerging opportunistic pathogen responsible for hospital-acquired infections, and which now constitutes a sufficiently serious threat to public health to necessitate the development of an effective vaccine. In this study, a recombinant fused protein named OmpK/Omp22 and two individual proteins OmpK and Omp22 were obtained using recombinant expression and Ni-affinity purification. Groups of BALB/c mice were immunized with these proteins and challenged with a clinically isolated strain of A...
February 2018: Biomedical and Environmental Sciences: BES
Raziqa Hadjidj, Abdelmalek Badis, Sondes Mechri, Kamel Eddouaouda, Lamia Khelouia, Rachid Annane, Mohamed El Hattab, Bassem Jaouadi
A novel extracellular alkaline protease, called SAPHM, from Bacillus licheniformis K7A was purified by four steps procedure involving heat treatment (30 min at 70 °C) followed by ammonium sulfate precipitation (40-70%)-dialysis, UNO Q-12 FPLC, and ZORBAX PSM 300 HPLC, and submitted to biochemical characterization assays. The purified enzyme is a monomer of molecular mass of 30,325.12 Da. Its sequence of the 26 NH2 -terminal residues showed high homology with those of Bacillus proteases. The purified enzyme was optimally active at pH 10 and temperature 70 °C...
March 29, 2018: International Journal of Biological Macromolecules
Jun-Hui Choi, Kyung-Je Kim, Seung Kim
We purified Lentinus edodes GNA01 fibrinolytic enzyme (LEFE) and identified it as a novel metalloprotease. LEFE was purified to homogeneity through a 2-step procedure, with an 8.28-fold increase in specific activity and 5.3% recovery. The molecular mass of LEFE was approximately 38 kDa, based on sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Its optimal pH, optimal temperature, pH stability, and thermal stability were 5, 30°C, 6-7, and 40°C, respectively. LEFE was inhibited by zinc and magnesium ions, and by EDTA and EGTA, indicating that LEFE is a metalloprotease...
2018: International Journal of Medicinal Mushrooms
Zaccaria Ricci, Stefano Romagnoli, Claudio Ronco, Gaetano La Manna
The incidence of the multiple organ dysfunction syndrome (MODS) is rapidly increasing in intensive care units (ICU). It usually combines with sepsis and is the most frequent cause of death in the ICU patients. The nature of the ICU patients has changed in the last years. It includes a variety of patients with severe cases due to major surgical interventions, trauma, hemodynamic instability, sepsis, and so on but also older people than previous times. All these situations can easily lead to MODS. In the prior years, the only available and efficient therapy was renal replacement therapy (RRT) for treating acute renal failure, but the development of technology also gives us devices to support the other systems...
2018: Contributions to Nephrology
Irene Jiménez-Munguía, Lucia Pulzova, Evelina Kanova, Zuzana Tomeckova, Petra Majerova, Katarina Bhide, Lubos Comor, Ivana Sirochmanova, Andrej Kovac, Mangesh Bhide
The mechanisms by which Streptococcus pneumoniae penetrates the blood-brain barrier (BBB), reach the CNS and causes meningitis are not fully understood. Adhesion of bacterial cells on the brain microvascular endothelial cells (BMECs), mediated through protein-protein interactions, is one of the crucial steps in translocation of bacteria across BBB. In this work, we proposed a systematic workflow for identification of cell wall associated ligands of pneumococcus that might adhere to the human BMECs. The proteome of S...
March 27, 2018: Scientific Reports
Wenjun Zhu, Shi Sun, Fei Yang, Kequan Zhou
α-Glucosidases have been a major target in controlling and managing postprandial blood glucose and therefore diabetes treatment. This study aims to further identify and purify active compounds from the most active ethyl acetate fraction collected previously in Tinta Cão grape pomace extract (TCEE) using a newly developed and highly effective immobilization method, including obtaining compounds previously shown to inhibit the enzyme. Purification used crosslinked chitosan beads with α-glucosidases bound to polymer, which acted as immobilized enzyme vehicle to collect inhibitors...
March 25, 2018: Journal of Food Science
Palanigounder Ganeshan Ajay Krishna, Thasma Raman Sivakumar, Chao Jin, Shao-Hu Li, Yu-Jie Weng, Juan Yin, Jun-Qiang Jia, Chu-Yan Wang, Zhong-Zheng Gui
Background: Mulberry fruits are a superior source of polyphenol, especially anthocyanins that contribute potentially to the beneficial effects which include reducing the risk of cardiovascular diseases and cancers with antioxidant, anti-inflammatory, and chemoprotective properties. Objectives: In this study, purification of the polyphenol-rich extract from mulberry fruit (MPE) was purified and assessed the activities of antioxidant and hemolysis protective in vivo and in vitro ...
January 2018: Pharmacognosy Magazine
Songwe Fanuel, Saeideh Tabesh, Kobra Mokhtarian, Esmaeil Saroddiny, Mohammad Reza Fazlollahi, Zahra Pourpak, Reza Falak, Gholam Ali Kardar
AIM: House dust mite (HDM) allergens are important elicitors of IgE-mediated allergies. This study was aimed at constructing and characterizing a recombinant fusion protein, DpTTDp, which was based on carrier-bound Der p 1-derived peptides for HDM allergen immunotherapy. METHODS: Using the Immune Epitope Database (IEDB), we identified from Der p 1, a 34-mer hypoallergenic peptide. Two copies of the hypoallergen were then fused to a partial fragment of a tetanus toxoid molecule's N-and C terminus and expressed in Escherichia coli...
March 23, 2018: Immunotherapy
George E G Kluck, Lívia Silva Cardoso, Nuccia N T De Cicco, Michele S Lima, Evelize Folly, Georgia C Atella
Tick infestation in cattle reflects the main cause of economic loss to cattle producers. This is due to several reasons but mainly to their ability to feed on blood and generate a huge amount of eggs. Lipid transport in arthropods is achieved by highly specialized hemolymphatic lipoproteins, which resemble those described in vertebrate blood. Such lipoproteins continuously deliver lipids through the blood to growing eggs. The injection of radioactive [3 H] palmitic acid into tick hemocoel showed that the gut, ovary, fat body and Gene's organ were the main organs of incorporation of this labeled fatty acid...
March 15, 2018: Ticks and Tick-borne Diseases
Kristina Warton, Lisa-Jane Graham, Nicole Yuwono, Goli Samimi
The utility of circulating DNA as a source of clinical biomarkers in blood is limited by its low concentration and small fragment size. Effective purification methods can maximize circulating DNA yield and contribute to the success of downstream protocols. We describe the evaluation of 4 commercial DNA purification kits-QIAamp Circulating Nucleic Acids kit, QIAamp DNA Blood Mini kit, QIAamp Ultrasens Virus kit and the QIASymphony DSP Virus kit-for the extraction of high and low molecular weight DNA from blood plasma...
March 6, 2018: Cancer Genetics
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