Abstract:
:Organic anion-transporting polypeptides (OATPs) mediate the uptake of various drugs from blood into the liver in the basolateral membrane of hepatocytes. Positron emission tomography (PET) is a potentially powerful tool to assess the activity of hepatic OATPs in vivo, but its utility critically depends on the availability of transporter-selective probe substrates. We have shown before that among the three OATPs expressed in hepatocytes (OATP1B1, OATP1B3, and OATP2B1), [11C]erlotinib is selectively transported by OATP2B1. In contrast to OATP1B1 and OATP1B3, OATP2B1 has not been thoroughly explored yet, and no specific probe substrates are currently available. To assess if the prototypical OATP inhibitor rifampicin can inhibit liver uptake of [11C]erlotinib in vivo, we performed [11C]erlotinib PET scans in six healthy volunteers without and with intravenous pretreatment with rifampicin (600 mg). In addition, FVB mice underwent [11C]erlotinib PET scans without and with concurrent intravenous infusion of high-dose rifampicin (100 mg/kg). Rifampicin caused a moderate reduction in the liver distribution of [11C]erlotinib in humans, while a more pronounced effect of rifampicin was observed in mice, in which rifampicin plasma concentrations were higher than in humans. In vitro uptake experiments in an OATP2B1-overexpressing cell line indicated that rifampicin inhibited OATP2B1 transport of [11C]erlotinib in a concentration-dependent manner with a half-maximum inhibitory concentration of 72.0 ± 1.4 μM. Our results suggest that rifampicin-inhibitable uptake transporter(s) contributed to the liver distribution of [11C]erlotinib in humans and mice and that [11C]erlotinib PET in combination with rifampicin may be used to measure the activity of this/these uptake transporter(s) in vivo. Furthermore, our data suggest that a standard clinical dose of rifampicin may exert in vivo a moderate inhibitory effect on hepatic OATP2B1.
journal_name
Mol Pharmjournal_title
Molecular pharmaceuticsauthors
Bauer M,Traxl A,Matsuda A,Karch R,Philippe C,Nics L,Klebermass EM,Wulkersdorfer B,Weber M,Poschner S,Tournier N,Jäger W,Wadsak W,Hacker M,Wanek T,Zeitlinger M,Langer Odoi
10.1021/acs.molpharmaceut.8b00588subject
Has Abstractpub_date
2018-10-01 00:00:00pages
4589-4598issue
10eissn
1543-8384issn
1543-8392journal_volume
15pub_type
杂志文章abstract::Targeted delivery of anticancer drugs to brain tumors, especially glioblastoma multiforme, which is the most frequent and aggressive type, is one of the important objectives in nanomedicine. Vascular endothelial growth factor (VEGF) and its receptor type II (VEGFR2) are promising targets because they are overexpressed...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.6b00519
更新日期:2016-11-07 00:00:00
abstract::Tumor endothelial marker 8 (TEM8) is a cell surface receptor that is highly expressed in a variety of human tumors and promotes tumor angiogenesis and cell growth. Antibodies targeting TEM8 block tumor angiogenesis in a manner distinct from the VEGF receptor pathway. Development of a TEM8 imaging agent could aid in pa...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp500056d
更新日期:2014-11-03 00:00:00
abstract::Eperisone hydrochloride (EH) is widely used as a muscle relaxant for patients with muscular contracture, low back pain, or spasticity. Human serum albumin (HSA) is a highly soluble negatively charged, endogenous and abundant plasma protein ascribed with the ligand binding and transport properties. The current study wa...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.6b01124
更新日期:2017-05-01 00:00:00
abstract::Progesterone receptor (PR) is a significant biomarker in diseases such as endometriosis and breast, ovarian, and uterine cancers that is associated with disease prognosis and therapeutic efficacy. While receptor status is currently determined by immunohistochemistry assays, the development of noninvasive PR imaging ag...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp200219e
更新日期:2011-08-01 00:00:00
abstract::Ratiometric fluorescence and cellular fractionation studies were employed to characterize the intracellular trafficking dynamics of antibody-poly(propylacrylic acid) (PPAA) conjugates in CD22+ RAMOS-AW cells. The HD39 monoclonal antibody (mAb) directs CD22-dependent, receptor-mediated uptake in human B-cell lymphoma c...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp300338s
更新日期:2012-12-03 00:00:00
abstract::The caveolin scaffolding domain peptide (CSP) is being developed for the therapeutic intervention of a lethal lung disease, idiopathic pulmonary fibrosis. While direct respiratory delivery of CSP7 (a 7-mer fragment of CSP) is considered an effective route, proper formulation and processing of the peptide are required....
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.9b01085
更新日期:2020-02-03 00:00:00
abstract::A promising strategy to enable patient stratification for targeted therapies is to monitor the target expression in a tumor by radionuclide molecular imaging. Affibody molecules (7 kDa) are nonimmunoglobulin scaffold proteins with a 25-fold smaller size than intact antibodies. They have shown an apparent potential as ...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.6b00089
更新日期:2016-05-02 00:00:00
abstract::Superoxide dismutase 1 (SOD1) efficiently catalyzes dismutation of superoxide, but its poor delivery to the target sites in the body, such as brain, hinders its use as a therapeutic agent for superoxide-associated disorders. Here to enhance the delivery of SOD1 across the blood-brain barrier (BBB) and in neurons the e...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp300496x
更新日期:2013-01-07 00:00:00
abstract::Approximately, 40-70% of active pharmaceutical ingredients (API) are severely limited by their extremely poor aqueous solubility, and consequently, there is a high demand for excipients that can be used to formulate clinically relevant doses of these drug candidates. Here, proof-of-concept studies demonstrate the pote...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.5b00723
更新日期:2016-03-07 00:00:00
abstract::Intracellular unbound drug concentrations determine affinity to targets in the cell interior. However, due to difficulties in measuring them, they are often overlooked in pharmacology. Here we present a simple experimental technique for the determination of unbound intracellular drug concentrations in cultured cells t...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp4000822
更新日期:2013-06-03 00:00:00
abstract::Tumor-associated inflammation has been linked to angiogenesis, metastasis and poor prognosis. The 18 kDa translocator protein (TSPO), also known as the peripheral benzodiazepine receptor (PBR), is expressed in activated immune cells such as macrophages, but also in a number of cancer cell lines such as those of breast...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp100433c
更新日期:2011-06-06 00:00:00
abstract::The human apical sodium-dependent bile acid transporter (hASBT) is a potential target for drug delivery, but an understanding of hASBT substrate requirements is limited. The objective of this study was to evaluate the influence of ionic character and steric bulk in the C-24 region of bile acid conjugates in governing ...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp0600135
更新日期:2006-05-01 00:00:00
abstract::5P12-RANTES is a recently developed chemokine analogue that has shown high level protection from SHIV infection in macaques. However, the feasibility of using 5P12-RANTES as a long-term HIV prevention agent has not been explored partially due to the lack of available delivery devices that can easily be modified for lo...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp3007242
更新日期:2013-10-07 00:00:00
abstract::Microcrystalline vinpocetine, coground with cross-linked polyvinylpyrrolidone, affords hybrids containing nanosized drug nanocrystals, the size and size distributions of which depend on milling times and drug-to-polymer weight ratios. Using an innovative approach to microstructural characterization, we analyzed wide-a...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.6b00124
更新日期:2016-09-06 00:00:00
abstract::The Flory-Huggins interaction parameter has been shown to be useful in predicting the thermodynamic miscibility of a polymer and a small molecule in a binary mixture. In the present paper, this concept was extended and evaluated to determine whether or not the Flory-Huggins interaction parameter can be applied to smal...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp900304p
更新日期:2010-06-07 00:00:00
abstract::Bisphosphonates (BPs) are a class of bone resorptive drug with a high affinity for the hydroxyapatite structure of bone matrices that are used for the treatment of osteoporosis. However, clinical application is limited by a common toxicity, BP-related osteonecrosis of the jaw. There is emerging evidence that BPs posse...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.5b00670
更新日期:2016-04-04 00:00:00
abstract::The Biopharmaceutical Classification System (BCS), which is a scientific approach to categorize active drug ingredient based on its solubility and intestinal permeability into one of the four classes, has been used to set the pharmaceutical quality standards for drug products in western society. However, it has receiv...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp300502m
更新日期:2013-05-06 00:00:00
abstract::The potential use of poly(dimethylsiloxane) (PDMS) as an in vitro biomimetic analogue of the passive drug absorption process in the human gastrointestinal tract (GI) is assessed. PDMS is biomimetic because of similarities in small molecule transport, such as mechanism, ionization selectivity, lipophilicity. Nine molec...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.7b00798
更新日期:2017-12-04 00:00:00
abstract::The tendency of highly supersaturated solutions of poorly water-soluble drugs to undergo liquid-liquid phase separation (LLPS) into drug-rich and water-rich phases when the concentration exceeds the amorphous solubility, for example, during dissolution of some amorphous solid dispersions, is thought to be advantageous...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.8b01117
更新日期:2019-01-07 00:00:00
abstract::The rapid absorptive clearance of drugs delivered to the airways of the lungs means that many inhaled medicines have a short duration of action. The aim of this study was to investigate whether forming polar ion-pairs can modify drug absorption to slow down clearance from the airways. Salbutamol was used as a model dr...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.9b01166
更新日期:2020-05-04 00:00:00
abstract::Bioadhesive nanoparticles based on poly(vinyl methyl ether/maleic anhydride) (PVMMA) and poly(ethylene glycol) methyl ether-b-poly(d,l-lactic acid) (mPEG-b-PLA) were produced by the emulsification solvent evaporation method. Paclitaxel was utilized as the model drug, with an encapsulation efficiency of up to 90.2 ± 4....
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.7b00612
更新日期:2017-10-02 00:00:00
abstract::The rate and extent of drug dissolution and absorption from solid oral dosage forms is highly dependent on the volume of liquid in the gastrointestinal tract (GIT). However, little is known about the time course of GIT liquid volumes after drinking a glass of water (8 oz), particularly in the colon, which is a targete...
journal_title:Molecular pharmaceutics
pub_type: 临床试验,杂志文章
doi:10.1021/acs.molpharmaceut.7b00095
更新日期:2017-08-07 00:00:00
abstract::The formation mechanism of drug nanoparticles was investigated using solid-state nuclear magnetic resonance (NMR) techniques for the efficient discovery of an optimized nanoparticle formulation. The cogrinding of nifedipine (NIF) with polymers, including hydroxypropyl methylcellulose (HPMC) and polyvinylpyrrolidone (P...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.5b00781
更新日期:2016-03-07 00:00:00
abstract::As the hearts of tumor cells, the nucleus is the ultimate target of many chemotherapeutic agents and genes. However, nuclear drug delivery is always hampered by multiple intracellular obstacles, such as low efficiency of lysosome escape and insufficient nuclear trafficking. Herein, an N-(2-hydroxypropyl) methacrylamid...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.6b00181
更新日期:2016-09-06 00:00:00
abstract::Viral nanotechnology is an emerging and highly interdisciplinary field in which viral nanoparticles (VNPs) are applied in diverse areas such as electronics, energy and next-generation medical devices. VNPs have been developed as candidates for novel materials, and are often described as "programmable" because they can...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章,评审
doi:10.1021/mp100225y
更新日期:2011-02-07 00:00:00
abstract::This study describes a novel nonlinear variant of the well-known Yalkowsky general solubility equation (GSE). The modified equation can be trained with small molecules, mostly from the Lipinski Rule of 5 (Ro5) chemical space, to predict the intrinsic aqueous solubility, S0, of large molecules (MW > 800 Da) from beyond...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.0c00689
更新日期:2020-10-05 00:00:00
abstract::How genotypic variation results in phenotypic differences is still a challenge for biology. In the field of drug metabolism, the means by which specific cytochrome P4502D6 (CYP2D6) genotypes yield different phenotypes at various levels (molecular, cellular, and organismal) is an important question, as differences in C...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.6b00920
更新日期:2017-03-06 00:00:00
abstract::The bicarbonate buffer capacity is usually considered in a phase-homogeneous system, at equilibrium, with no CO2 transfer between the liquid buffer phase and another phase. However, typically, an in vitro bicarbonate buffer-based system is a phase-heterogeneous system, as it entails continuously sparging (bubbling) th...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.8b00783
更新日期:2018-11-05 00:00:00
abstract::Effective penetration of drug-carrying nanoparticles into solid tumors is a major challenge in cancer therapy. Exploration of the physicochemical properties of nanoparticles that affect penetration efficiency is required to achieve maximum therapeutic effects. Here, we used confocal laser scanning microscopy to evalua...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/acs.molpharmaceut.7b00051
更新日期:2017-06-05 00:00:00
abstract::The objectives of this study were as follows: (i) To develop an in silico technique, based on molecular dynamics (MD) simulations, to predict glass transition temperatures (Tg) of amorphous pharmaceuticals. (ii) To computationally study the effect of plasticizer on Tg. (iii) To investigate the intermolecular interacti...
journal_title:Molecular pharmaceutics
pub_type: 杂志文章
doi:10.1021/mp400118v
更新日期:2013-11-04 00:00:00