Abstract:
PURPOSE:Recombinant human serum albumin (rHSA), secreted by a Pichia pastoris expression system, was purified by a fast and efficient method, the essential feature of which is strong but reversible binding of the protein to Blue Sepharose. The structural characteristics, stability, and ligand-binding properties of the resulting protein were examined, and pre-clinical studies were performed. METHODS:Protein structure was investigated by amino acid sequencing, sodium polyacrylamide gel electrophoresis, CD spectroscopy and chromatography. Stability was examined by denaturation by guanidine hydrochloride and by calorimetry, and ligand binding was studied by ultrafiltration. Rat experiments were performed with 125I-labeled albumin. RESULTS:Far-ultraviolet and near-ultraviolet CD spectra of rHSA were identical to those of human serum albumin isolated from serum (HSA). Mercaptalbumin and non-mercaptalbumin were separated by high-performance liquid chromatography using an N-methylpyridinium polymer-based column. 60% of rHSA existed as mercaptalbumin, a content that is higher than that of a commercial preparation of HSA. Fatty acids, N-acetyl-L-tryptophan and pasteurization had similar effects on the conformational stability of rHSA and HSA. Stereoselective ligand-binding properties (warfarin, phenprocoumon, pranoprofen and ibuprofen) of rHSA were the same as those of HSA. The effect of the neutral to base transition on warfarin (site I-ligand) and dansylsarcosine (site II-ligand) binding to rHSA was also similar to HSA. In vivo studies showed comparable half-lives, excretion and tissue distributions of the two albumin preparations. CONCLUSION:The present yeast expression system and purification procedure result in rHSA with structural and functional properties very similar to those of HSA.
journal_name
Pharm Resjournal_title
Pharmaceutical researchauthors
Watanabe H,Yamasaki K,Kragh-Hansen U,Tanase S,Harada K,Suenaga A,Otagiri Mdoi
10.1023/a:1013391001141subject
Has Abstractpub_date
2001-12-01 00:00:00pages
1775-81issue
12eissn
0724-8741issn
1573-904Xjournal_volume
18pub_type
杂志文章abstract:PURPOSE:To develop a streamlined strategy for pharmaceutical cocrystal preparation without knowledge of the stoichiometric ratio by preparing and characterizing the cocrystals of myricetin (MYR) with four cocrystal coformers (CCF). METHODS:An approach based on the phase solubility diagram (PSD) was used for MYR cocrys...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-014-1443-y
更新日期:2015-01-01 00:00:00
abstract:PURPOSE:To measure aggregate and particle formation in tumor necrosis factor-alpha (TNF-α) inhibitors etanercept, adalimumab and certolizumab pegol product samples after exposure to freezing temperature conditions similar to storage conditions previously observed in patients' homes. METHODS:TNF-α inhibitors in their o...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-017-2341-x
更新日期:2018-02-05 00:00:00
abstract:PURPOSE:Magnetic resonance imaging (MRI) is widely used for diagnostic imaging in preclinical studies and in clinical settings. Considering the intrinsic low sensitivity and poor specificity of standard MRI contrast agents, the enhanced delivery of MRI tracers into tumors is an important challenge to be addressed. This...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-015-1736-9
更新日期:2015-11-01 00:00:00
abstract:PURPOSE:We investigated the characteristics of transport of an organic anion, p-aminohippurate (PAH), at the apical membrane in a kidney epithelial cell line OK. METHODS:Efflux and uptake of [14C]PAH across the apical membrane were measured using OK cell monolayers grown on microporous membrane filters. RESULTS:PAH e...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1021437306990
更新日期:2002-12-01 00:00:00
abstract:PURPOSE:To synthesize a trifluorinated bile acid that can be used for (19)F magnetic resonance imaging (MRI) of bile acid enterohepatic circulation, characterize its in vitro transporter affinity, stability, and (19)F-MRI signal, and assess its ability to concentrate in the gallbladder of C57BL/6 mice. METHODS:Target ...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-012-0963-6
更新日期:2013-05-01 00:00:00
abstract::The simultaneous diffusion and metabolism of the D- and L-isomers of the aminopeptidase substrate, leucine-p-nitroanilide (LPNA), were examined in vitro in the hamster cheek pouch. L-LPNA was completely hydrolyzed during diffusion across the cheek pouch, whereas D-LPNA crossed the cheek pouch intact. The metabolic bar...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1015949614437
更新日期:1989-11-01 00:00:00
abstract:PURPOSE:For the assessment of bioequivalence it is assumed that drug clearance in each subject on each of the study days is the same and any observed differences in AUC and/or Cmax between a brand and generic formulation are due to differences in bioavailability. We hypothesized that this assumption was invalid for hig...
journal_title:Pharmaceutical research
pub_type: 临床试验,杂志文章
doi:10.1023/a:1016040825844
更新日期:1996-06-01 00:00:00
abstract:PURPOSE:Reverse micellar solutions of diclofenac sodium were encapsulated in soft gelatine capsules. On contact with aqueous media they exhibited an application induced transformation (AIT) into a semisolid system of liquid crystals (SSLC) which slows down drug release. The aim of the present paper was to study in vitr...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1012127829032
更新日期:1997-12-01 00:00:00
abstract:PURPOSE:In vitro and in vivo permeation studies were conducted to evaluate the characteristic of percutaneous administration of high hydrophilic drug L-carnitine (LC) by Functional MicroArray (FMA) painless intradermal delivery system. METHODS:In vitro study was designed to assess the effects of various skins, donor c...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-010-0109-7
更新日期:2011-01-01 00:00:00
abstract::Although much effort has been devoted to opioid research since the identification of enkephalins, understanding of the physiological importance and mechanisms of action of endogenous opioids lags behind understanding of opiate alkaloids such as morphine. In recent years, several novel approaches have been refined with...
journal_title:Pharmaceutical research
pub_type: 杂志文章,评审
doi:10.1023/a:1015809702296
更新日期:1991-01-01 00:00:00
abstract:PURPOSE:To study the influence of cytotoxicity of macromolecules, VEGF gene expression, and vascular permeability on the enhanced permeability and retention (EPR) effect. METHODS:Mice bearing xenografts of A2780 multidrug resistant human ovarian carcinoma were treated by free doxorubicin (DOX) and N-(2-hydroxypropyl)m...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1007500412442
更新日期:2000-05-01 00:00:00
abstract::A series of carboxyfluorescein (CF)-containing multilamellar vesicle (MLV) dispersions was prepared and extruded through polycarbonate membranes ranging in size from 0.2 to 5 microns. Vesicle dispersions were nebulized for 80 min using a Collison nebulizer, and the release of CF was monitored during nebulization. Solu...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1015896121377
更新日期:1991-02-01 00:00:00
abstract:PURPOSE:Locoregional recurrence is the most common complication after adenocarcinoma resection in the colon, despite adjuvant chemotherapy. Therapy efficacy could be improved if designed to target malignant cells by incorporating specific recognition factors in the drugs or the drug vehicles. The aim of this study was ...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-007-9330-4
更新日期:2008-02-01 00:00:00
abstract:PURPOSE:Nanocrystalline drug-polymer dispersions are of significant interest in pharmaceutical delivery. The purpose of this work is to demonstrate the applicability of methods based on two-dimensional (2D) and multinuclear solid-state NMR (SSNMR) to a novel nanocrystalline pharmaceutical dispersion of ebselen with pol...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-012-0713-9
更新日期:2012-07-01 00:00:00
abstract:PURPOSE:To investigate in vitro if P-glycoprotein (P-gp) transport can differentiate between antibiotic drugs exhibiting increased active renal clearance (CL(r)) in cystic fibrosis (CF) patients (i.e., dicloxacillin, trimethoprim) and drugs that do not exhibit this phenomenon (i.e.. cefsulodin, sulfamethoxazole). METH...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1015191511817
更新日期:2002-04-01 00:00:00
abstract:PURPOSE:The objective of the current study was to investigate whether blood-brain barrier (BBB) permeability studies in vitro could be accelerated by running several compounds together in the same experiment. METHODS:To address this question, we compared the transport of six compounds run separately with the results o...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/b:pham.0000026424.78528.11
更新日期:2004-05-01 00:00:00
abstract:PURPOSE:The gadopentetic acid (Gd-DTPA)-loaded chitosan nanoparticles (Gd-nanoCPs) were prepared for gadolinium neutron-capture therapy (Gd-NCT) and characterized and evaluated as a device for intratumoral (i.t.) injection. METHODS:Gd-nanoCPs were prepared by a novel emulsion-droplet coalescence technique. The effects...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1018995124527
更新日期:1999-12-01 00:00:00
abstract:PURPOSE:Induction of cell-mediated immune (CMI) responses is crucial for vaccine-mediated protection against difficult vaccine targets, e.g., Chlamydia trachomatis (Ct). Adjuvants are included in subunit vaccines to potentiate immune responses, but many marketed adjuvants stimulate predominantly humoral immune response...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-017-2180-9
更新日期:2017-08-01 00:00:00
abstract:PURPOSE:The purpose of this study was (a) to suggest a novel dermatopharmacokinetic (DPK) approach from which pharmacokinetic parameters relevant to the bioequivalence (BE) assessment of a topical formulation can be deduced while circumventing the need for numerous measurements and assumptions, and (b) to investigate w...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-019-2724-2
更新日期:2020-01-02 00:00:00
abstract:PURPOSE:Herein we report the discovery of a group of derivatized alpha-amino acids that increase the oral bioavailability of sodium cromolyn. METHODS:We prepared three N-acylated alpha-amino acids and used these compounds to demonstrate the oral delivery of cromolyn in an in vivo rat model. In vitro experiments, inclu...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1016034913181
更新日期:1996-02-01 00:00:00
abstract:PURPOSE:To characterize the distribution of water among various components in a powder blend using solid-state NMR spectroscopy. METHODS:Water sorption behavior of theophylline anhydrate and excipients was determined by dynamic vapor sorption (DVS) and Karl Fischer Titration (KFT) after storing them in humidity chambe...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-016-1972-7
更新日期:2016-10-01 00:00:00
abstract::The interaction of dicumarol and phenothiazine neuroleptics binding to alpha 1-acid glycoprotein (AGP) was investigated by circular dichroism (CD) and equilibrium dialysis. The induced CD spectra of the dicumarol-AGP complex were affected differently by the different substituents of the phenothiazine molecule. The sig...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1015880327911
更新日期:1992-07-01 00:00:00
abstract:PURPOSE:To identify the key formulation factors controlling the initial drug and polymer dissolution rates from an amorphous solid dispersion (ASD). METHODS:Ketoconazole (KTZ) ASDs using PVP, PVP-VA, HMPC, or HPMC-AS as polymeric matrix were prepared. For each drug-polymer system, two types of formulations with the sa...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-016-1969-2
更新日期:2016-10-01 00:00:00
abstract:PURPOSE:To assess the uridine diphosphate (UDP)-glucuronosyltransferase (UGT) isozymes involved in the glucuronidation of niflumic acid in human liver. METHODS:The glucuronidation activity of niflumic acid was determined in liver microsomes and recombinant UGT isozymes by incubation of niflumic acid with UDP-glucuroni...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-006-0250-5
更新日期:2006-07-01 00:00:00
abstract::Pediatric brain tumors are most common cancers in childhood and among the leading causes of death in children. Chemotherapy has been used as adjuvant (i.e. after) or neoadjuvant (i.e. before) therapy to surgery and radiotherapy for the management of pediatric brain tumors for more than four decades and gained more att...
journal_title:Pharmaceutical research
pub_type: 杂志文章,评审
doi:10.1007/s11095-013-1196-z
更新日期:2014-03-01 00:00:00
abstract::One of the barriers to transdermal delivery of peptides is the metabolic activity of the epidermis. To define this metabolic activity, aminopeptidase activity and Leu-enkephalin metabolism were measured in the epidermis obtained from neonatal mouse skin and in cultured mouse keratinocytes. Aminopeptidase activity was ...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1015882323677
更新日期:1991-01-01 00:00:00
abstract:PURPOSE:To develop novel biomineral-binding liposomes (BBL) for the prevention of orthopedic implant associated osteomyelitis. METHODS:A biomineral-binding lipid, alendronate-tri(ethyleneglycol)-cholesterol conjugate (ALN-TEG-Chol), was synthesized through Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition (a versatile...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-012-0812-7
更新日期:2012-11-01 00:00:00
abstract::The pentahydrate (alpha form) of cefazolin sodium (CEZ) exhibited sharp X-ray diffraction peaks, while the dehydrated alpha form showed weak but distinct diffraction peaks. As expected the amorphous form exhibited a diffuse and halo diffraction pattern. The X-ray procedure to estimate the degree of crystallinity of CE...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1023/a:1015984300692
更新日期:1988-07-01 00:00:00
abstract:PURPOSE:To examine the theoretical/practical utility of the liver-to-blood partition coefficient (Kpuu) for predicting drug-drug interactions (DDIs), and compare the Kpuu-approach to the extended clearance concept AUCR-approach. METHODS:The Kpuu relationship was derived from first principles. Theoretical simulations i...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-020-02797-w
更新日期:2020-03-25 00:00:00
abstract:PURPOSE:The trial-and-error approach is still predominantly used in pharmaceutical development of nanosuspensions. Physicochemical dispersion stability is a primary focus and therefore, various analytical bulk methods are commonly employed. Clearly less attention is directed to surface changes of nanoparticles even tho...
journal_title:Pharmaceutical research
pub_type: 杂志文章
doi:10.1007/s11095-017-2300-6
更新日期:2018-02-21 00:00:00