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Human serum albumin

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https://www.readbyqxmd.com/read/29140677/synthesis-of-multi-au-nanoparticles-embedded-mesoporous-silica-microspheres-as-self-filtering-and-reusable-substrates-for-sers-detection
#1
Miao Chen, Wen Luo, Zhimin Zhang, Ranhao Wang, Yuqiu Zhu, Hua Yang, Xiaoqing Chen
Surface-enhanced Raman scattering (SERS) based biosensing in biological fluids is constrained by nonspecific macromolecules adsorptions and disposable property of the SERS substrate. Here, novel multi-Au nanoparticles-embedded mesoporous silica microspheres (AuNPs/mSiO2) was prepared using a one-pot method, which served as reliable substrates for SERS enhancement associated with salient features of self-filtering ability and reusability. The fabrication and physical characterization of AuNPs/mSiO2 microspheres were discussed, and SERS activity of this novel substrates was investigated by using 4-mercaptobenzoic acid (4-MBA) as Raman probe...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29137984/recombinant-human-glp-1-rhglp-1-alleviating-renal-tubulointestitial-injury-in-diabetic-stz-induced-rats
#2
Weiqin Yin, Shiqing Xu, Zai Wang, Honglin Liu, Liang Peng, Qing Fang, Tingting Deng, Wenjian Zhang, Jinning Lou
GLP-1-based treatment improves glycemia through stimulation of insulin secretion and inhibition of glucagon secretion. Recently, more and more findings showed that GLP-1 could also protect kidney from diabetic nephropathy. Most of these studies focused on glomeruli, but the effect of GLP-1 on tubulointerstitial and tubule is not clear yet. In this study, we examined the renoprotective effect of recombinant human GLP-1 (rhGLP-1), and investigated the influence of GLP-1 on inflammation and tubulointerstitial injury using diabetic nephropathy rats model of STZ-induced...
November 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29137754/proteinaceous-microspheres-as-a-delivery-system-for-carvacrol-and-thymol-in-antibacterial-applications
#3
Chana G Sokolik, Rina Ben-Shabat-Binyamini, Aharon Gedanken, Jean-Paul Lellouche
There is an urgent need for new materials with antimicrobial activity. Phenolic essential oil (EO) compounds with Generally Recognized As Safe (GRAS) status are attractive candidates, but they need suitable delivery systems to overcome specific drawbacks. Core-shell microspheres (MSs) of Bovine Serum Albumin (BSA) or Human Serum Albumin (HSA) encapsulating such active compounds in the oil phase are a delivery system that is novel in combination with phenolic EO compounds. Moreover, the EO compounds can also be assembled in an oil shell around a protein core by choosing an appropriate oil phase...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29136788/red-emitting-bsa-stabilized-copper-nanoclusters-acted-as-a-sensitive-probe-for-fluorescence-sensing-and-visual-imaging-detection-of-rutin
#4
Benqian Wang, Rijun Gui, Hui Jin, Weijie He, Zonghua Wang
In this article, red-emitting copper nanoclusters (Cu NCs) were prepared in the matrix of bovine serum albumin (BSA) through using N2H4·H2O as a reducing agent and BSA as a stabilizer. In the aqueous suspension of BSA-Cu NCs, the addition of rutin enabled the combination of rutin with BSA around Cu NCs via hydrogen bond and electrostatic interactions between functional groups of BSA and rutin. The approaching of rutin to Cu NCs induced that the fluorescence (FL) of Cu NCs was quenched by rutin due to the electron transfer from Cu NCs to rutin...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136782/effect-of-human-umbilical-cord-blood-derived-mononuclear-cells-on-diabetic-nephropathy-in-rats
#5
Nahla E El-Ashmawy, Eman G Khedr, Hoda A El-Bahrawy, Shimaa A El-Berashy
Diabetic nephropathy (DN) is damage to the kidney which can lead to chronic renal failure, eventually requiring dialysis. Diabetes mellitus is the most common cause of adult kidney failure worldwide in the developed world. The current work was designed to elucidate the effect of mononuclear cells (MNCs) injection on reverse DN in rats exposed to streptozotocin (STZ) injection compared to metformin as a known hypoglycemic drug, 40 Male rats were divided equally into 4 groups; normal control group, diabetic control group, MNCs group were diabetic rats treated with MNCs (30×10(6) MNCs/rat once iv dose) in the tail vein of the rat, and metformin group were diabetic rats treated with metformin (100mg/kg orally daily dose) for four weeks...
November 8, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29134771/detection-of-%C3%AE-amyloid-by-sialic-acid-coated-bovine-serum-albumin-magnetic-nanoparticles-in-a-mouse-model-of-alzheimer-s-disease
#6
Seyedmehdi Hossaini Nasr, Hovig Kouyoumdjian, Christiane Mallett, Sherif Ramadan, David C Zhu, Erik M Shapiro, Xuefei Huang
The accumulation and formation of β-amyloid (Aβ) plaques in the brain are distinctive pathological hallmarks of Alzheimer's disease (AD). Designing nanoparticle (NP) contrast agents capable of binding with Aβ highly selectively can potentially facilitate early detection of AD. However, a significant obstacle is the blood brain barrier (BBB), which can preclude the entrance of NPs into the brain for Aβ binding. In this work, bovine serum albumin (BSA) coated NPs are decorated with sialic acid (NP-BSAx -Sia) to overcome the challenges in Aβ imaging in vivo...
November 14, 2017: Small
https://www.readbyqxmd.com/read/29133205/hpma-copolymer-conjugate-with-pirarubicin-in-vitro-and-ex-vivo-stability-and-drug-release-study
#7
Waliul Islam, Jun Fang, Tomas Etrych, Petr Chytil, Karel Ulbrich, Akihiro Sakoguchi, Katsuki Kusakabe, Hiroshi Maeda
We have developed a tumor environment-responsive polymeric anticancer prodrug containing pirarubicin (THP) conjugated to N-(2-hydroxypropyl) methacrylamide copolymer (PHPMA), [P-THP], through a spacer containing pH-sensitive hydrazone bond, that showed remarkable therapeutic effect against various tumor models and in a human pilot study. Toward clinical development, here we report THP release profile from its HPMA copolymer conjugate, the conjugate stability, protein and cell-binding and solubility of P-THP...
November 10, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29133088/fructose-human-serum-albumin-interaction-undergoes-numerous-biophysical-and-biochemical-changes-before-forming-ages-and-aggregates
#8
Asif Zaman, Zarina Arif, Moinuddin, Khursheed Alam
Fructose is a reducing and highly lipogenic sugar that has unique metabolic effects in the liver. Non-enzymatic fructosylation of proteins generates advanced glycation end products (AGEs). Human serum albumin (HSA) may undergo fructosylation vis-à-vis AGEs formation. High fructose consumption may lead to structurally altered and functionally compromised fructosylated-HSA-AGEs, which can cause damage to hepatocytes resulting in hepatic macro- and microvesicular steatosis. In this study, HSA was incubated with varying concentrations of fructose for 10days and the induced changes were studied...
November 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29131605/poly-%C3%AF-methoxyalkyl-acrylate-s-a-nonthrombogenic-polymer-family-with-tunable-protein-adsorption
#9
Shingo Kobayashi, Miyuki Wakui, Yukihisa Iwata, Masaru Tanaka
A series of polyacrylates with different n-alkyl side chain lengths (one to six, and twelve carbons) and a ω-methoxy terminal group [poly(ω-methoxyalkyl acrylate): PMCxA] were prepared to study their nonthrombogenicity using human platelet adhesion, micro bicinchoninic acid (micro BCA) protein assay, and enzyme-linked immunosorbent assay (ELISA) tests. In all cases, human platelet adhesion was suppressed on the PMCxA coated substrates, and the number of human platelets adhered to the PMC3A [poly(3-methoxypropyl acrylate)] coated surface was comparable to that of commercialized nonthrombogenic coating agent poly(2-methoxyethyl acrylate) (PMEA, equal to PMC2A)...
November 13, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/29130895/ceramic-core-with-polymer-corona-hybrid-nanocarrier-for-the-treatment-of-osteosarcoma-with-co-delivery-of-protein-and-anti-cancer-drug
#10
Ram Prasad Sekar, T S Sampath Kumar, Jayakrishnan Athipettah
For the treatment of metastatic bone cancer, local delivery of therapeutic agents is preferred compared to systemic administration. Delivery of an anti-cancer drug and a protein that helps in bone regeneration simultaneously is a challenging approach. In this study, a nanoparticulate carrier which delivers a protein and an anti-cancer drug is reported. Bovine serum albumin (BSA) as a model protein was loaded into hydroxyapatite (HA) nanoparticles (NPs) and methotrexate (MTX) conjugated to poly(vinyl alcohol) was coated onto BSA-loaded HA NPs...
November 13, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29130703/nutritional-practices-in-very-low-birth-weight-infants-a-national-survey
#11
Gerardo Rodríguez-Martínez, Eduardo Narbona, Marcos Linés, María Gormaz, Miguel Sáenz de Pipaón, Ricardo Closa, José Uberos, Carlos Zozaya, María L Couce
BACKGROUND: Significant efforts have been made to improve the nutritional support of very preterm infants. Large surveys may help to know the nutritional practices for preterm infants in neonatal units and identify if they are in line with the current guidelines. METHODS: A multicentre nationwide web-based survey on clinical feeding practices in very low birth weight (VLBW) infants was conducted in tertiary neonatal hospitals that admit infants with a birth weight < 1,500 g and/or a gestational age of < 32 weeks...
October 24, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29130672/-effects-of-cellular-density-on-the-induction-of-suspension-globe-of-ovarian-cancer-stem-cells
#12
Mian-Zhi Chen, Lan Zhong, Dong-Mei Wei, Xiao-Yu Niu
OBJECTIVE: To determine the effect of cellular density on the separation and identification of cancer stem cells from human ovarian clear cell carcinoma cell line ES-2 and adenocarcinoma cell line A2780. METHODS: ES-2 and A2780 cells were cultured with human recombinant epidermal growth factor (EGF) and basic fibroblast growth factor (bFGF) and bovine serum albumin and insulin in serum free medium. The cancer stem cells were obtained through serial passages. Changes in cell morphology,expressions of surface marker CD133 and CD44,and soft AGAR clone forming in the stem cells were examined under different cell density,either in serum-supplemented medium (SSM group) or in serum free medium (SFM group)...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29128746/human-serum-albumin-binding-of-certain-antimalarials
#13
Olivera S Marković, Ilija N Cvijetić, Mario V Zlatović, Igor M Opsenica, Jelena M Konstantinović, Nataša V Terzić Jovanović, Bogdan A Šolaja, Tatjana Ž Verbić
Interactions between eight in-house synthesized aminoquinolines, along with well-known chloroquine, and human serum albumin (HSA) have been studied by fluorescence spectroscopy. The synthesized aminoquinolines, despite being structurally diverse, were found to be very potent antimalarials. Fluorescence measurements indicate that three compounds having additional thiophene or benzothiophene substructure bind more strongly to HSA than other studied compounds. Competitive binding experiments indicate that these three compounds bind significantly stronger to warfarin compared to diazepam binding site...
November 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29128705/1-3-di-n-butylimidazolium-tribromide-bbim-br3-an-efficient-recyclable-catalyst-mediated-synthesis-of-n-substituted-azepines-and-their-biological-evaluation-interaction-study-with-human-serum-albumin
#14
Swetha K Maddili, Rakhi Chowrasia, Vijaya Kumar Kannekanti, Himabindu Gandham
A majority of previously reported methods suffer from insufficient yields as well as more complicated experimental procedures, a smaller amount of isolated yields involving time-consuming and tiresome work-up with the use of metal catalyst and restricted scope of substrates. To overcome these issues, an environmentally benign, ionic liquid endorsed multi-component protocol to N-substituted azepines has been exploited by means of coupling aromatic amines, dimethyl/diethyl acetylene dicarboxylate, 2,5-dimethoxytetrahydrofuran using 1,3-Di-n-butylimidazolium tribromide [BBim]Br3...
November 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29127252/validation-of-an-ergonomic-method-to-withdraw-99m-tc-radiopharmaceuticals
#15
Sandy Blondeel-Gomes, Solène Marie, Julien Fouque, Sabrina Loyeau, Olivier Madar, François Lokiec
The main objective of the present work was to ensure quality of radiopharmaceuticals syringes withdrawn with a "Spinal needle/obturator In-Stopper" system. Methods: Visual examinations and physicochemical tests are performed at T0 and T+4h for [(99m)Tc]albumin nanocolloid and T+7h for [(99m)Tc]eluate, [(99m)Tc] HydroxyMethylene DiPhosphonate and [(99m)Tc]Human Serum Albumin. Microbiological validation was performed according to European pharmacopoeia. Fingertip radiation exposure was evaluated to confirm the safety of the system...
November 10, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/29126006/a-multispectroscopic-and-molecular-docking-investigation-of-the-binding-interaction-between-serum-albumins-and-acid-orange-dye
#16
Selvaraj Naveenraj, Rajadurai Vijay Solomon, Ramalinga Viswanathan Mangalaraja, Ponnambalam Venuvanalingam, Abdullah M Asiri, Sambandam Anandan
The interaction of Acid Orange 10 (AO10) with bovine serum albumin (BSA) was investigated comparatively with that of human serum albumin (HSA) using multispectroscopic techniques for understanding their toxic mechanism. Further, density functional theory calculations and docking studies have been carried out to gain more insights into the nature of interactions existing between AO10 and serum albumins. The fluorescence results suggest that AO10 quenched the fluorescence of BSA through the combination of static and dynamic quenching mechanism...
October 31, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29124017/optimization-of-an-in-vitro-assay-methodology-for-competitive-binding-of-thyroidogenic-xenobiotics-with-thyroxine-on-human-transthyretin-and-albumin
#17
Katie L Hill, Timo Hamers, Jorke H Kamstra, William G Willmore, Robert J Letcher
Thyroid hormones (THs) are involved in the regulation of many physiological processes in vertebrates. Competition for TH binding sites on serum transport proteins can interfere with delivery of THs to target tissues, and this is a potential mechanism of action of exogenous thyroidogenic substances. To date, detailed accounts of in vitro methods for competitive binding with THs on TH transport proteins (human or wildlife) are sparse. In the limited number of published studies on in vitro radio-labelled TH-TH transport protein interactions, method descriptions were brief and with insufficient details for successful replication...
2017: MethodsX
https://www.readbyqxmd.com/read/29123871/comparison-of-quality-of-human-serum-albumin-preparations-in-two-pharmaceutical-products
#18
Hajime Nakae, Kouki Tomida, Yoshihiro Kikuya, Manabu Okuyama, Toshiko Igarashi
Aim: Human serum albumin (HSA) is known for its multiple functions, such as maintenance of colloid osmotic pressure, transport of endogenous and exogenous substances, and antioxidation. The aim of this study was to measure the redox state and concentrations of β-d-glucan and endotoxin to compare the quality of 5% HSA preparations from two different manufacturers. Methods: The quality of 5% HSA preparations in two different pharmaceutical products (groups A and B) was compared in terms of the percentage of reduced and oxidized albumin and the contaminant level of β-d-glucan and endotoxin...
July 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29123392/self-assembled-albumin-nanoparticles-for-combination-therapy-in-prostate-cancer
#19
Huibo Lian, Jinhui Wu, Yiqiao Hu, Hongqian Guo
Resistance to regular treatment strategies is a big challenge in the treatment of castration-resistant prostate cancer. Combination of photothermal and photodynamic therapy (PTT/PDT) with chemotherapy offers unique advantages over monotherapy alone. However, free drugs, such as photosensitizers and chemotherapeutic agents, lack tumor-targeted accumulation and can be easily eliminated from the body. Moreover, most of the PTT drugs are hydrophobic and their organic solvents have in vivo toxicity, thereby limiting their potential in clinical translation...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29122590/physiological-serum-copper-concentrations-found-in-malignancies-cause-unfolding-induced-aggregation-of-human-serum-albumin-in-vitro
#20
Asim Rizvi, Mohd Furkan, Imrana Naseem
Malignancies are characterized by several drastic metabolic changes, one of which is a progressive rise in the levels of serum copper. This rise in serum copper is documented across all malignancies and across malignancies in several species. This study aims to explore in vitro the effect of increased copper levels on the structure of the blood protein human serum albumin. Exposure of human serum albumin to physiologically relevant copper concentrations for 21 days resulted in structural modifications in the protein which were evident by changes in the intrinsic florescence...
November 6, 2017: Archives of Biochemistry and Biophysics
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