Effect of particle size reduction on dissolution and oral absorption of a poorly water-soluble drug, cilostazol, in beagle dogs

…, M Odomi, H Toguchi, GG Liversidge, K Higaki… - Journal of controlled …, 2006 - Elsevier
The purpose of the present study was to investigate the effects of particle size on the dissolution
and oral absorption of cilostazol. Three types of suspensions having different particle …

Establishment of new preparation method for solid dispersion formulation of tacrolimus

…, A Ohike, Y Tokunaga, R Ibuki, K Higaki… - International journal of …, 2003 - Elsevier
The aim of this study was to establish a new preparation method for solid dispersion formulation
(SDF) of tacrolimus, a poorly water-soluble drug, without dichloromethane, because no …

Time-dependent changes in opsonin amount associated on nanoparticles alter their hepatic uptake characteristics

S Nagayama, K Ogawara, Y Fukuoka, K Higaki… - International journal of …, 2007 - Elsevier
The relationship between the time-dependent change in serum proteins adsorbed on
nanoparticles and their disposition to the liver was investigated by employing lecithin-coated …

Pre-coating with serum albumin reduces receptor-mediated hepatic disposition of polystyrene nanosphere: implications for rational design of nanoparticles

…, K Furumoto, S Nagayama, K Minato, K Higaki… - Journal of controlled …, 2004 - Elsevier
We evaluated the in vivo disposition characteristics of polystyrene nanospheres (NS) with
the particle size of 50 nm (NS-50) pre-coated with human serum albumin (HSA) after …

Skin permeation of propranolol from polymeric film containing terpene enhancers for transdermal use

C Amnuaikit, I Ikeuchi, K Ogawara, K Higaki… - International journal of …, 2005 - Elsevier
To develop the suitable film formulations of propranolol hydrochloride (PPL) containing
enhancers for transdermal use, polymeric film formulations were prepared by employing ethyl …

Gastrointestinal transit and drug absorption

T Kimura, K Higaki - Biological and Pharmaceutical Bulletin, 2002 - jstage.jst.go.jp
The gastrointestinal (GI) absorption of orally administered drugs is determined by not only
the permeability of GI mucosa but also the transit rate in the GI tract. It is well known that the …

Prolongation of residence time of liposome by surface-modification with mixture of hydrophilic polymers

T Shehata, K Ogawara, K Higaki, T Kimura - International journal of …, 2008 - Elsevier
The objective of this study is to evaluate the biodistribution characteristics of liposomes
surface-modified with the mixture of polyethylene glycol (PEG) and polyvinyl alcohol (PVA) as a …

PEG liposomalization of paclitaxel improved its in vivo disposition and anti-tumor efficacy

…, Y Kono, K Ogawara, T Kimura, K Higaki - International journal of …, 2011 - Elsevier
To find out potent paclitaxel (PTX) formulations for cancer chemotherapy, we formulated
PTX in O/W emulsion and liposome selected as candidates of nanocarriers for PTX. Surface …

Hepatic uptake of polystyrene microspheres in rats: effect of particle size on intrahepatic distribution

K Ogawara, M Yoshida, K Higaki, T Kimura… - Journal of Controlled …, 1999 - Elsevier
The in vivo disposition of polystyrene microsphere (MS) with the particle size of 50 nm (MS-50)
or 500 nm (MS-500) was characterized after intravenous administration to rats. A rapid …

In vivo anti-tumor effect of PEG liposomal doxorubicin (DOX) in DOX-resistant tumor-bearing mice: Involvement of cytotoxic effect on vascular endothelial cells

K Ogawara, K Un, K Tanaka, K Higaki… - Journal of controlled …, 2009 - Elsevier
We evaluated the in vivo anti-tumor effect of polyethylene glycol-modified liposomal
doxorubicin (PEG liposomal DOX) in the DOX-resistant Colon-26 cancer cells (C26/DOX)-bearing …