Abstract:
:The purpose of this study was to reveal the effectiveness of the polymer coated liposomes as a carrier of the anticancer drug doxorubicin in intravenous administration. The size controlled doxorubicin-loaded liposomes (egg phosphatidylcholine : cholesterol = 1:1 in molar ratio) were coated with hydrophilic polymers (polyvinyl alcohol; PVA and hydroxypropylmethylcellulose; HPMC) having a hydrophobic moiety in the molecules (PVA-R, HPMC-R). The existence of a thick polymer layer on the surface of the polymer coated liposomes was confirmed by measuring the change in particle size and the amount of polymer on the liposomal surface. The polymer coating effects on the tumor accumulation of the drug encapsulated in the liposomes were evaluated in Walker rat carcinoma 256 cell bearing rats. The doxorubicin-loaded liposomes coated with PVA-R and HPMC-R showed higher drug accumulation into the tumor site by prolonging the systemic circulation in tumor-bearing rats. The targeting efficiency of the polymer coated liposomes calculated with the total and tumorous clearance of the drug was ca. 5 times larger than that of non-coated liposomes. We ascertained that polymers having a hydrophobic moiety in the molecule such as PVA-R and HPMC-R are suitable materials for modifying the surfaces of the doxorubicin-loaded liposome to improve its targeting properties.
journal_name
Biol Pharm Bulljournal_title
Biological & pharmaceutical bulletinauthors
Takeuchi H,Kojima H,Yamamoto H,Kawashima Ydoi
10.1248/bpb.24.795subject
Has Abstractpub_date
2001-07-01 00:00:00pages
795-9issue
7eissn
0918-6158issn
1347-5215journal_volume
24pub_type
杂志文章abstract::The uric acid concentration in blood has been widely accepted as a diagnostic indicator of hyperuricemia and gout, and its assay method is well established. In the present study, we developed a simple and rapid method for the determination of uric acid in hair, which can be obtained non-invasively. The concentration (...
journal_title:Biological & pharmaceutical bulletin
pub_type: 临床试验,杂志文章
doi:10.1248/bpb.21.398
更新日期:1998-04-01 00:00:00
abstract::Methylmercury (MeHg) is a causative agent of Minamata disease and an environmental pollutant that comprises a large portion of organically occurring mercury. Many aspects of the biological defense mechanisms against MeHg toxicity remain unclear. Recently, nuclear factor-E2-related factor 2 (Nrf2), heat shock factor pr...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章,评审
doi:10.1248/bpb.b212019
更新日期:2012-01-01 00:00:00
abstract::The aim of this study was to determine the stimulatory effects of Maillard reaction, a non-enzymatic browning reaction on the expression of pro-inflammatory cytokines and phagocytic activity induced by whey protein concentrate (WPC). Glycated WPC (G-WPC) was prepared by a reaction between WPC and the lactose it contai...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b15-00596
更新日期:2016-01-01 00:00:00
abstract::The effective cure for oral squamous cell carcinoma (OSCC) patients is challenging due late diagnosis and fatal metastasis. The standard diagnosis for OSCC often depends on the subjective interpretation of conventional histopathology. Additionally, there is no standard way for OSCC prognosis. Over the past decade, nan...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b16-00266
更新日期:2016-01-01 00:00:00
abstract::The extract of Ongael [leaves of Phaleria cumingii (MEISN.) F. VILL.], a Palauan medicinal herb, enhanced an in vitro phagocytic activity of mouse macrophages RAW 264.7 cells (RAW 264.7). Activity-guided fractionation of the Ongael extract by the in vitro phagocytosis assay using RAW 264.7 led to the isolation of a mi...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.28.929
更新日期:2005-05-01 00:00:00
abstract::By means of successive heparin-affinity and glycyrrhizin (GL)-affinity column chromatographies (HPLC), a 55 kDa GL-binding protein (gp55) was purified to apparent homogeneity from the Superdex P-I fraction of Habu snake venom. This gp55 was identified as an apoxin I-like protein, because (i) its 20 N-terminal amino ac...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.21.924
更新日期:1998-09-01 00:00:00
abstract::Assessment of biological potency and its comparison with clinical effects are important in the quality control of therapeutic glycoproteins. Animal models are usually used for evaluating bioactivity of these compounds. However, alternative methods are required to simplify the bioassay and avoid ethical issues associat...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.33.1596
更新日期:2010-01-01 00:00:00
abstract::Cytochrome P450 monooxygenases (P450s) catalyze a wide variety of monooxygenation reactions in primary and secondary metabolism in plants. The share of P450 genes in each plant genome is estimated to be up to 1%. This implies that the diversification of P450 has made a significant contribution to the ability to acquir...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章,评审
doi:10.1248/bpb.35.824
更新日期:2012-01-01 00:00:00
abstract::The protective effect of sodium-L-ascorbyl-2 phosphate (As-2P), a stable form of ascorbic acid (AsA), against photodamage induced by a single dose of UVB exposure (290-320 nm, Max 312 nm) was investigated using cultured mouse skin. When the cultured skin was treated with various As-2P concentrations, the cutaneous AsA...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.22.1301
更新日期:1999-12-01 00:00:00
abstract::Skeletal muscle is a major site for glucose metabolism and its injury by cytokines can induce insulin resistance leading to type 2 diabetes. It has been suggested that quercetin may act as an anti-diabetic agent, however, the effects of quercetin on insulin resistance in skeletal muscle remain unknown. We aimed to inv...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b12-00947
更新日期:2013-01-01 00:00:00
abstract::Restraint stressed rats were used as a model of Shanghuo and a global metabolic investigation of the effects of cantonese herbal tea (CHT) on the model rats was then performed by gas chromatography-mass spectrometry (GC/MS) metabonomics in an attempt to characterize the metabolic changes underlying such stress and any...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b14-00203
更新日期:2014-01-01 00:00:00
abstract::To clarify the pathogenicity and the pathogenic factors of Candida tropicalis strains, five strains, IFO 0199, IFO 0587, IFO 0589, IFO 1400, and IFO 1647, of C. tropicalis were tested for their lethality to mice, adherence to Hela cells, hydrophobicity, cell growth under acidic conditions (pH 2.0-5.9), and sucrose ass...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.31.1507
更新日期:2008-08-01 00:00:00
abstract::Human parvovirus B19 is a clinically important pathogen in both children and adults. In adults, it frequently causes acute and chronic arthritis, which may be related to persistent infection. The effect of the capsid of human parvovirus B19 on monocytes, which are thought to be responsible for the first line of defens...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.30.2027
更新日期:2007-11-01 00:00:00
abstract::Three sialoglycoprotein fractions having reactivities against influenza A and B viruses (IV-A and IV-B) and influenza virus-hemagglutinin (IV-HA), were obtained by gel filtration using a Sephacryl S-300 column and an Asahipak GS-710 HPLC column from water-soluble fraction prepared from human meconium (ME-WSF). Molecul...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.20.1141
更新日期:1997-11-01 00:00:00
abstract::The dopamine reuptake inhibitor bupropion and dopamine D2/3 receptor agonist pramipexole have been clinically proven to improve both depression and treatment-resistant depression. We examined its influence on the duration of immobility during the forced swim test in adrenocorticotropic hormone (ACTH)-treated rats and ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b13-00749
更新日期:2014-01-01 00:00:00
abstract::Chitooligosaccharides, the oligomers made up of beta-1,4-linked D-glucosamine, are obtained by partial hydrolysis of chitosan, a deacetylation product of chitin. The antioxidant activity of various chitooligosaccharides was tested in vitro with aminoguanidine, pyridoxamine, and Trolox as reference compounds. Hydroxyla...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.26.1326
更新日期:2003-09-01 00:00:00
abstract::Polysaccharides are involved in biological responses and can activate complement system, which plays an important role in primary host defense mechanisms. We investigated anticomplementary activities from spice plants and selected thyme (Thymus vulgaris L.) as a potent complementary activator. Acidic polysaccharide (T...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.24.941
更新日期:2001-08-01 00:00:00
abstract::The effect of gel-forming (1-->3)-beta-D-glucan on the immunological activities of murine kupffer cells was examined. A branched type gel-forming (1-->3)-beta-D-glucan, GRN, was administered intravenously to mice. GRN associating to kupffer cells was detected by an immunohistochemical technique using anti-GRN antibody...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.21.278
更新日期:1998-03-01 00:00:00
abstract::Costunolide, isolated from the stem bark of Magnolia sieboldii, is a sesquiterpene lactone that exhibits various biological and immunological actions. We investigated the induction mechanism of apoptosis by costunolide in a human B cell leukemia NALM-6 cell culture system. Costunolide (10 microM)-induced apoptosis tim...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.31.1024
更新日期:2008-05-01 00:00:00
abstract::Possible involvement of the peripheral-type benzodiazepine receptor (PBR) in hemin/protoporphyrin-induced erythroid differentiation of human leukemia K562 cells was investigated by the use of the ligands, diazepam and PK11195. Diazepam itself exhibited differentiation-inducing activity on K562 cells. The PBR-specific ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.18.903
更新日期:1995-06-01 00:00:00
abstract::The present study investigated whether or not Sho-saiko-to (crude powder extract, TJ-9) can suppress nitric oxide (NO) generation by endotoxin-activated J774A.1 cells in order to study the preventive mechanism of Sho-saiko-to against endotoxemia. In this experiment, we estimated the NO2- in the murine macrophage cell ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.18.621
更新日期:1995-04-01 00:00:00
abstract::Two different forms of oxytocinase (L-cystine aminopeptidase, CAP; EC 3.4.11.3) were purified from the 9000 g and 105000 g precipitate fractions of human placenta homogenate by sequential chromatography on columns of hydroxyapatite, DE-32, nickel ion affinity, and Sephadex G-200. One species (CAP-I) purifed from the m...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.20.20
更新日期:1997-01-01 00:00:00
abstract::In vitro release behavior and cytotoxic activity, and in vivo plasma disposition of newly synthesized macromolecular derivatives of cisplatin (CDDP) were investigated and compared with CDDP. The derivatives included oxidized dextran conjugate of CDDP (OX-Dex/CDDP) and dicarboxymethylated dextran conjugate of CDDP (DCM...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.22.756
更新日期:1999-07-01 00:00:00
abstract::A lipid fraction obtained by activity-guided fractionation from the hexane extract of Sideritis javalambrensis was evaluated for anti-inflammatory activity. This fraction significantly inhibited paw oedema induced by carrageenan as well as ear oedema induced by 12-O-tetradecanoylphorbol 13-acetate (TPA) in mice after ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.23.1193
更新日期:2000-10-01 00:00:00
abstract::We investigated whether peripherally administered aconitine increases spontaneous acetylcholine (ACh) release from the frontal cerebral cortex in freely moving rats using in vivo microdialysis, as it relates to aconitine-induced bradycardia estimated by a tail-artery cuff technique in unilateral anterior hypothalamus ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.19.1440
更新日期:1996-11-01 00:00:00
abstract::The effects of Ginkgo biloba leaf extract (GBE), one of the most widely used herbal dietary supplements in Japan and the United States, on the pharmacokinetics of nifedipine (NFP), a typical probe of P450 (CYP) 3A, but not a substrate of the multidrug transporter P-glycoprotein (P-gp), were studied using rats. Simulta...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.27.2042
更新日期:2004-12-01 00:00:00
abstract::The roles of OmpC and OmpF in acidic resistance (AR) were examined. When ompC and ompF were deleted, AR was decreased. The decreased level of AR seen in the mutant that was deficient in ompC and ompF was elevated by the addition of glutamate, but not by the addition of arginine or lysine. The expression levels of adiA...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.34.330
更新日期:2011-01-01 00:00:00
abstract::We demonstrate that glycyrrhizin (GL) enhanced Fas-mediated apoptotic body formation and DNA fragmentation in T cell lines although GL alone did not induce apoptosis. The enhancement effect of Fas-mediated apoptosis by GL was dose-dependent above 0.3 microM. Time course study revealed that simultaneous co-treatment of...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.22.1163
更新日期:1999-11-01 00:00:00
abstract::The purpose of this study was to evaluate the influence of caffeine and theophylline on the development of dental caries in rats. Six Wistar dams (spf), mutans streptococci free, were obtained, each with six male pups. The dams were infected by Streptococcus sobrinus 6715 and divided into three groups which received d...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.23.339
更新日期:2000-03-01 00:00:00
abstract::Shikonin, a major ingredient in the Chinese traditional herb Lithospermum erythrorhixon, exhibits multiple biological functions including antimicrobial, anti-inflammatory, and antitumor effects. In this study, we delineated the molecular mechanisms of shikonin in the apoptosis of 143B osteosarcoma cells. Shikonin redu...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.33.816
更新日期:2010-01-01 00:00:00