Abstract:
:Polyethyleneglycol (PEG) compounds have a large hydrogen bonding capability and possess various functions that depend on the length of the chain and conformational diversity. Modification of a drug with PEG is a well-known technology for improving the physicochemical properties and biological responses of a drug. There are many reports about the modification of small molecules with PEG, however, there are no modified small molecule products currently on the market. Several protein products for medical use are commercially available. In this review, the effects of modification with PEG on biopharmaceuticals are described through the comparison of two interferon-α products modified with PEG, one with 12 kDa linear PEG and the other 40 kDa branched PEG. There is one original drug delivery system product, Doxil(®)/Caelyx(®), on the market in which liposomes modified with PEG and encapsulating doxorubicin are stabilized sterically and invisible to the reticuloendothelial system. The benefits of modification with PEG are described here with examples of modified products on the market and used in clinical trials.
journal_name
Biol Pharm Bulljournal_title
Biological & pharmaceutical bulletinauthors
Ishihara Hdoi
10.1248/bpb.b13-00087subject
Has Abstractpub_date
2013-01-01 00:00:00pages
883-8issue
6eissn
0918-6158issn
1347-5215pii
DN/JST.JSTAGE/bpb/b13-00087journal_volume
36pub_type
杂志文章,评审abstract::A liposomal formulation of UCN-01 was studied to prevent binding of drug to human alpha1-acid glycoprotein (hAGP). The release of drug from liposomes added to various media was investigated by monitoring the concentration of UCN-01 in different fractions. Protein bound UCN-01 was separated from liposomal UCN-01 and fr...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.28.1259
更新日期:2005-07-01 00:00:00
abstract::Arsenicals are known to be toxic and carcinogenic in humans. Inorganic arsenicals are enzymatically methylated to monomethylarsonic acid (MMAsV) and dimethylarsinic acid (DMAsV), which are the major pentavalent methyl arsenic metabolites. Recent reports indicate that trivalent methyl arsenicals are produced through me...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.28.1827
更新日期:2005-10-01 00:00:00
abstract::The recent emergence of multidrug-resistant pathogens and/or pharmacokinetics-pharmacodynamics considerations may result in off-label use of a certain class of antibacterials, including tigecycline. This study was performed to clarify the safety profile of tigecycline in the user-derived manner and to compare it with ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.35.967
更新日期:2012-01-01 00:00:00
abstract::Methylripariochromene A (MRC) was isolated from the leaves of Orthosiphon aristatus (Lamiaceae) and subjected to the examination of several pharmacological actions related to antihypertensive activity. The following four findings were revealed from the present study: 1) MRC caused a continuous decrease in systolic blo...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.22.1083
更新日期:1999-10-01 00:00:00
abstract::Regorafenib is a small molecule inhibitor of tyrosine kinases, and has been shown to improve the outcomes of patients with advanced colorectal cancer and advanced gastrointestinal stromal tumors. The transport profiles of regorafenib by various transporters were evaluated. HEK293/organic anion transporting polypeptide...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b14-00740
更新日期:2015-01-01 00:00:00
abstract::Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is characterized by disabling fatigue of at least 6 months, in addition to symptoms such as muscle pain and muscle weakness. There is no treatment provides long-term benefits to most patients. Recently, clinical research suggested the involvement of pyruvate ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b19-00009
更新日期:2019-01-01 00:00:00
abstract::The effect of sesamol and 20 related compounds on the lipid peroxidation of liposomes induced by Fe(2)+, on the lipid peroxidation of rat liver microsomes induced by CCl(4) or NADPH and on the lipid peroxidation of mitochondria induced by ascorbate/Fe(2)+ were demonstrated. Consequently, sesamol and related compounds,...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.19.623
更新日期:1996-04-01 00:00:00
abstract::Bee pollen consists of floral pollen mixed with bee secretions and nectar. It has been considered as a functional food and has different kinds of biologically active ingredients, such as flavonoids, polyphenols, phytosterols and minerals. However, its function in cognition has yet been investigated. In the present stu...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b18-00552
更新日期:2019-01-01 00:00:00
abstract::We established a highly sensitive method for evaluating P-glycoprotein activity in Caco-2 cells. Using time-lapse confocal laser-scanning microscopy, we measured the change in fluorescence of residual rhodamine 123 in Caco-2 cells. Horizontal fluorescence images of rhodamine 123 in the apical and central parts of thes...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.33.1238
更新日期:2010-01-01 00:00:00
abstract::We have developed a mass microscope in which a microscope is combined with high-resolution matrix assisted laser desorption/ionization-imaging mass spectrometry (MALDI-IMS). This technique is a powerful tool for investigating the spatial distribution of biomolecules without the need for any time-consuming extraction, ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章,评审
doi:10.1248/bpb.b212007
更新日期:2012-01-01 00:00:00
abstract::Human pluripotent stem cells (hPSCs), i.e. human embryonic stem cells and human induced pluripotent stem cells, are able to self-renew and differentiate into multiple cell types. Because of these abilities, numerous attempts have been made to utilize hPSCs in regenerative medicine/cell therapy. hPSCs are, however, als...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章,评审
doi:10.1248/bpb.b12-00970
更新日期:2013-01-01 00:00:00
abstract::The antiproliferative constituents in the MeOH extracts of the aerial parts of Lippia dulcis Trev. and Lippia canescens Kunth (Verbenaceae) were investigated. Activity-guided chemical investigation of the MeOH extracts resulted in the isolation of the three bisabolane-type sesquiterpenes [(+)-hernandulcin (1), (-)-epi...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.25.920
更新日期:2002-07-01 00:00:00
abstract::The aim of the present study was to clarify the mechanism underlying the inhibition of cell proliferation in human lung cancer A549 cells by selenium (Se) compounds. Methylseleninic acid (CH3SeO2H, abbreviated as MSA), a synthetic Se compound, is a direct precursor of active methylselenol (CH3SeH) and is considered to...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b14-00453
更新日期:2014-01-01 00:00:00
abstract::In vitro studies were conducted to identify human drug-metabolizing enzymes involved in the metabolism of SNI-2011 ((+/-)-cis-2-methylspiro [1,3-oxathiolane-5,3'-quinuclidine] monohydrochloride hemihydrate, cevimeline hydrochloride hydrate). When 14C-SNI-2011 was incubated with human liver microsomes, SNI-2011 trans-s...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.24.1263
更新日期:2001-11-01 00:00:00
abstract::The present study was performed to investigate the effects of histamine H(1)-antagonists on the sleep-awake state in rats placed on a grid suspended over water in comparison with rats placed on sawdust. When rats were placed on the grid suspended over water, significant increases in the awake time and decreases in non...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.32.51
更新日期:2009-01-01 00:00:00
abstract::Rats stressed by specific alternation of rhythm in temperature (SART) show various symptoms of disautonomia, increased pulse rates, continuous hypotension, and severe orthostatic hypotension (OH) when they are subjected to postural change. The OH symptoms are improved by muscarinic M2-receptor blockers. In the present...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.30.303
更新日期:2007-02-01 00:00:00
abstract::Japanese allergic subjects are commonly sensitized to both house dust mite (HDM) and Japanese cedar pollen (JCP) and combined treatment with sublingual immunotherapy (SLIT) tablets is desirable. However, mixing extracts of two non-homologous allergens may compromise allergen stability and affect the clinical outcome. ...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b20-00330
更新日期:2020-10-01 00:00:00
abstract::We have previously reported the expression of CYP genes in human myeloblastic and lymphoid cell lines, and the induction of the CYP3A4 and GSTP1 genes by oxidative stress in the human erythroleukemia cell line, K562. To further elucidate the role of drug metabolizing enzymes in hematogenesis, we have characterized the...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.30.1954
更新日期:2007-10-01 00:00:00
abstract::To develop a piroxicam-loaded gelatin microcapsule with enhanced bioavailability, a gelatin microcapsule encapsulated ethanol and piroxicam has been formulated by using gelatin as a water-soluble polymer shell. The aqueous solubility and bioavailability of piroxicam in piroxicam-loaded microcapsule in rats were then e...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.31.1284
更新日期:2008-06-01 00:00:00
abstract::Ogi-Keishi-Gomotsu-To-Ka-Kojin (OKGK) is a traditional herbal medicine (Kampo medicine) which has been found to ameliorate hypercholesterolemia and hypertriglyceridemia in rats and rabbits. In the present study, the effect of OKGK on acyl-CoA:cholesterol acyltransferase (ACAT) was studied in order to elucidate the mec...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.22.994
更新日期:1999-09-01 00:00:00
abstract::Tyrosinase is a key enzyme in the synthesis of melanin and is widely distributed in animals, plants, and microorganisms. As excessive melanin production causes not only hyperpigmenting effects on human skin but also melanosis in various foods, an inhibitor of tyrosinase has become of interest lately from a practical p...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.31.1618
更新日期:2008-08-01 00:00:00
abstract::Selective inhibitors of phosphodiesterases (PDEs) have been suggested to have anti-inflammatory effects on bronchial asthma through the inhibition of chemotaxis, adhesion, degranulation, the respiratory burst, and survival prolongation of eosinophils. However, the mechanisms by which these agents inhibit eosinophil su...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.28.515
更新日期:2005-03-01 00:00:00
abstract::Hepatoprotective effect of celosian, an acidic polysaccharide isolated from the water extract of the seed of Celosia argentea, was investigated using chemical and immunological liver injury models. Celosian inhibited the elevation of serum enzyme (GPT, GOT, LDH) and bilirubin levels on carbon tetrachloride (CC1(4))-in...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.19.567
更新日期:1996-04-01 00:00:00
abstract::In most species, solar light is both a DNA-damaging agent and the key entraining stimulus for the endogenous circadian clock. The zebrafish is an attractive vertebrate system in which to study the influence of light on gene expression because the DNA repair proteins and circadian oscillators in this species are light-...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.34.1343
更新日期:2011-01-01 00:00:00
abstract::Echinacoside is a major compound of Cistanche Herb and has glutamate release-inhibiting activity in the brain. Given the involvement of excitotoxicity caused by massive glutamate in the pathophysiology of epilepsy, we explored the antiepileptic effect of echinacoside on kainic acid-induced seizures in rats. The rats w...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b18-00407
更新日期:2018-11-01 00:00:00
abstract::Aconitine administered intraperitoneally (i.p.) produces bradycardia mainly by a central muscarinic action. The involvement of hypothalamic regions in the occurrence of aconitine-induced bradycardia was investigated in hypothalamus-lesioned mice. The lesions were made by passing a direct current (1.5 mA, 13 s) through...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.20.856
更新日期:1997-08-01 00:00:00
abstract::We studied the effects of twelve 5,7-dihydroxyflavone analogs on adipogenesis in 3T3-L1 cells. Among the compounds, luteolin, diosmetin, and chrysoeriol partly inhibited adipogenesis by blocking the accumulation of triacylglycerol in the cells. Conversely, tricetin facilitated triacylglycerol accumulation in the cells...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b15-00489
更新日期:2015-01-01 00:00:00
abstract::Imbalance between oxidative stress and antioxidative defence system is generally known as one of mechanisms causing an oxidative stress-medieated neuropathogenesis. Peroxiredoxins (Prxs), a family of antioxidative enzymes neutralizing cellular hydroperoxides, was characterized recently, but their distributions and rol...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.31.820
更新日期:2008-05-01 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::In the present study, we evaluated the effect of the novel acid pump antagonist 7-(4-fluorobenzyloxy)-2,3-dimethyl-1-{[(1S,2S)-2-methylcyclopropyl]methyl}-1H-pyrrolo[2,3-d]pyridazine (CS-526) on the intragastric acidity of cynomolgus monkeys. The study was performed in a crossover manner with five male animals. CS-526...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.32.2010
更新日期:2009-12-01 00:00:00