Abstract：
:Repetitive administration is routinely used to maintain therapeutic drug levels, but previous studies have documented an accelerated blood clearance of some lipid-based delivery systems under these conditions. To assess the effect of repetitive administration, non-PEGylated lipoplexes (+/-0.5) were administered 4 times via tail vein injection at 3-day intervals to immunocompetent BALB/c mice bearing 4T1 tumors. This study measured the effect of repeat administration of nontargeted lipoplexes on clearance, cytokine/chemokine response, plasmid distribution, reporter gene expression, and liver toxicity. We do not observe a refractory period or a statistically significant difference in blood clearance between the first administration and subsequent injections of this lipoplex formulation, consistent with the absence of a cytokine/chemokine response. However, we do see a significant effect on both plasmid accumulation and expression, an enhancement of 26-fold and 10-fold in tumor plasmid levels and expression, respectively, after 4 injections as compared to that after a single injection. In addition, in vivo imaging suggests that expression in other organs had diminished rapidly 72 h after each administration, in contrast to relatively constant expression in the tumor. Taken together, the findings indicate that gene delivery to tumors can be dramatically enhanced by employing repetitive administration.
journal_name
J Pharm Scijournal_title
Journal of pharmaceutical sciencesauthors
Betker JL,Anchordoquy TJdoi
10.1016/j.xphs.2016.11.013subject
Has Abstractpub_date
2017-03-01 00:00:00pages
872-881issue
3eissn
0022-3549issn
1520-6017pii
S0022-3549(16)41851-4journal_volume
106pub_type
杂志文章abstract：:NMR was used to study the binding of acetylcholine, atropine, and physostigmine to acetylcholinesterase. Changes in the linewidth of the N-methyl resonance of acetylcholine, resulting from association with the enzyme during hydrolysis, were utilized to study the enzyme-substrate interaction. Physostigmine inhibited th...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600640337
更新日期：1975-03-01 00:00:00
abstract：:Nasal administration as a means of delivering therapeutic agents preferentially to the brain has gained significant recent interest. While some substrates appear to be delivered directly to the brain via this route, the mechanisms governing overall brain uptake and exposure remain unclear. Some substrates utilize the ...
journal_title：Journal of pharmaceutical sciences
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doi：10.1002/jps.20318
更新日期：2005-06-01 00:00:00
abstract：:Inclusion complexes between beta-cyclodextrin derivatives and 1, 2-dithione-3-thiones were studied in aqueous solution and in the solid state. Phase solubility study was used to evaluate the complexation in solution, at 37 degrees C, of three cyclodextrins, i. e., beta-cyclodextrin (betaCD), hydroxypropyl-beta-cyclode...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1021/js990067o
更新日期：1999-09-01 00:00:00
abstract：:A sensitive, simple, and rapid method for the quantitation of ibuprofen in plasma, using 1-(p-fluorobenzoyl)-5-methoxy-2-methylindole acetic acid as the internal standard, was developed. The method is based on reversed-phase high-pressure liquid chromatography with a mobile phase containing acetonitrile--0.1 M acetic ...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600700829
更新日期：1981-08-01 00:00:00
abstract：:During the manufacturing process of biopharmaceuticals, peristaltic pumps are employed at different stages for transferring and dosing of the final product. Commonly used silicone tubings are known for particle shedding from the inner tubing surface due to friction in the pump head. These nanometer sized silicone rubb...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2020.12.002
更新日期：2020-12-09 00:00:00
abstract：:A comprehensive model is developed to describe the swelling/dissolution behaviors and drug release from hydrophilic matrices. The major thrust of this model is to employ an important physical property of the polymer, the polymer disentanglement concentration, rho p,dis, the polymer concentration below which polymer ch...
journal_title：Journal of pharmaceutical sciences
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doi：10.1002/jps.2600841214
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abstract：:Two generalized modes of erosion kinetics, that is, the power law mode and root type mode, respectively, were found to be able to better describe the reported weight loss data compared to the existing linear mode, for commonly used surface-eroding polymer microspheres. Based on the newly identified modes, a set of dru...
journal_title：Journal of pharmaceutical sciences
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doi：10.1016/j.xphs.2016.04.002
更新日期：2016-06-01 00:00:00
abstract：:Nanocrystals have emerged as a potential formulation strategy to eliminate the bioavailability-related problems by enhancing the initial dissolution rate and moderately super-saturating the thermodynamic solubility. This review contains an in-depth knowledge of, the processing method for formulation, an accurate quant...
journal_title：Journal of pharmaceutical sciences
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doi：10.1002/jps.24694
更新日期：2016-01-01 00:00:00
abstract：:Pancreatic islet transplantation is a promising advanced therapy that has been used to treat patients suffering from diabetes type 1. Traditionally, pancreatic islets are infused via the portal vein, which is subsequently intended to engraft in the liver. Severe immunosuppressive treatments are necessary, however, to ...
journal_title：Journal of pharmaceutical sciences
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doi：10.1016/j.xphs.2019.10.028
更新日期：2020-01-01 00:00:00
abstract：:Conventionally, it is believed that the fraction of orally administered drugs absorbed from the intestine (Fa) and intestinal availability (Fg) are independently determined by the apical membrane permeation and intestinal metabolism, respectively. However, the validity of this belief has not been well discussed, and F...
journal_title：Journal of pharmaceutical sciences
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doi：10.1016/j.xphs.2015.11.005
更新日期：2016-02-01 00:00:00
abstract：:In this study, powder surface imaging was utilized in evaluation of particle size-related segregation behavior of granules during vibration and tableting processes. Altogether, eight granule batches were manufactured using a fluidized bed granulator. The particle size distribution of each batch was measured with sieve...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.23126
更新日期：2012-06-01 00:00:00
abstract：:The chemical stability of the novel anticancer agent carzelesin in aqueous buffer/acetonitrile (1:1, v/v) mixtures has been investigated utilizing a stability-indicating reversed-phase high-performance liquid chromatographic assay. The degradation kinetics of carzelesin has been studied as a function of pH, buffer com...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1021/js960005n
更新日期：1996-11-01 00:00:00
abstract：:Baclofen, a widely used antispastic agent, has been found to exist in two crystalline forms, the anhydrate and monohydrate. The aim of this study was (1) to identify and characterize these two solid phases of baclofen, and (2) to examine the processing-induced phase transformations associated with wet granulation of b...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.20894
更新日期：2007-09-01 00:00:00
abstract：:Though there is an advantage in using the higher solubility amorphous state in cases where low solubility limits absorption, physical instability poses a significant barrier limiting its use in solid oral dosage forms. Unlike chemical instability, where useful accelerated stability testing protocols are common, no met...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章,评审
doi：10.1002/jps.21138
更新日期：2008-04-01 00:00:00
abstract：:The transdermal delivery of 2 fluorescent probes with similar molecular weight but different lipophilicity, into and through the skin from 2 commercially available transdermal bases, pluronic lecithin organogel, and Lipoderm® has been evaluated. First, in vitro penetration of fluorescein sodium and fluorescein (free a...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2017.09.008
更新日期：2018-02-01 00:00:00
abstract：:Previous studies from this laboratory suggested that a solution model (Flory-Huggins equation) modified by a free volume model (Vrentas equation) could satisfactorily describe water absorption into an amorphous solid composed of a sugar or a polymer. This paper has extended the studies of single solutes to binary mixt...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.1090
更新日期：2001-09-01 00:00:00
abstract：:The chromatographic retention behavior of dextromethorphan hydrobromide on an octadecylsilane column was investigated as a function of the pairing ion and the mobile phase composition. Dramatic increases in the capacity factor were observed with pairing ions containing more than eight carbons and with decreasing organ...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600691207
更新日期：1980-12-01 00:00:00
abstract：:Pharmaceutical cocrystals have garnered significant interest as potential solids to address issues associated with formulation development of drug substances. However, studies concerning the understanding of formulation behavior of cocrystals are still at the nascent stage. We present results of our attempts to evalua...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2017.09.013
更新日期：2018-02-01 00:00:00
abstract：:The relationship between chemical structure and antifungal activity of quaternary imidazolium compounds is analyzed. The compounds are described by a set of condition attributes concerning structure and by a decision attribute concerning activity. The description builds up an information system. The smallest set of co...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600840225
更新日期：1995-02-01 00:00:00
abstract：:A revised classification system for oral drugs was developed using the biopharmaceutics classification system (BCS) as a starting point. The revised system is designed to have a greater focus on drug developability. Intestinal solubility, the compensatory nature of solubility and permeability in the small intestine an...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.22217
更新日期：2010-12-01 00:00:00
abstract：:Drug transporters expressed in liver and kidney play a critical role in the elimination of a wide range of drugs and xenobiotics and inhibition of these transporters may therefore cause clinically significant drug-drug interactions (DDIs). Currently, in vitro transporter inhibition data are used to assess the risk tha...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章,评审
doi：10.1016/j.xphs.2017.04.007
更新日期：2017-09-01 00:00:00
abstract：:Three dimensional terahertz pulsed imaging (TPI) was evaluated as a novel tool for the nondestructive characterization of different solid oral dosage forms. The time-domain reflection signal of coherent pulsed light in the far infrared was used to investigate film-coated tablets, sugar-coated tablets, multilayered con...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.20789
更新日期：2007-02-01 00:00:00
abstract：:Gepirone hydrochloride, an investigational anxiolytic drug, was found to have at least three polymorphic forms which melted at 180 degrees C (I), 212 degrees C (II), and 200 degrees C (III). Thermal analytical studies showed that forms I and II were an enantiotropic pair, as were forms I and III. Form III was monotrop...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600741004
更新日期：1985-10-01 00:00:00
abstract：:In water, the antineoplastic drug cisplatin, cis-[PtCl2(NH3)2] (1) hydrolyses slowly to the aqua complexes cis-[Pt(NH3)2Cl(H2O)]+ (2) and, to a small extent, cis-[Pt(NH3)2(H2O)2]2+ (3), which are thought to play an important role in the metabolism of cisplatin. HPLC is a useful technique for monitoring 2 and 3, but on...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1021/js980287m
更新日期：1999-03-01 00:00:00
abstract：:A GLC determination of cyclobenzaprine in human plasma and urine is described. After extraction from alkalinized samples with heptane-isopentyl alcohol (97:3), the drug and internal standard were back-extracted into 0.1 N HCl and then reextracted into ether. Use of a lower homolog of the drug as an internal standard w...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600650832
更新日期：1976-08-01 00:00:00
abstract：:The period of time after administration over which blood level measurements are required to obtain a reliable bioavailability comparison of two or more formulations of the same drug was considered by the analysis of bioavailability data taken from the literature. The drugs examined, selected to represent a range of ab...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600640921
更新日期：1975-09-01 00:00:00
abstract：:Lipid-based dose forms, which encompass a wide variety of compositional and functional characteristics, can be advantageously utilized for the formulation of lipophilic drugs. There has been a traditional reluctance to develop lipid-based dose forms due to potential problems of chemical and physical instability, and a...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章,评审
doi：10.1002/1520-6017(200008)89:8<967::aid-jps1>3.0.co
更新日期：2000-08-01 00:00:00
abstract：:A series of N1-p-chlorophenyl-N5-alkylbiguanides were synthesized as potential inhibitors of dental plaque. Partition coefficients and pKa values were determined by standard methods. Biological activity was evaluated against Streptococcus mutans, a pure strain of plaque-forming bacteria. All compounds were compared to...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600650731
更新日期：1976-07-01 00:00:00
abstract：:Anionic surfactants compromise skin's barrier function by damaging stratum corneum lipids and proteins. The objective of this study was to examine anionic surfactant-induced changes in the skin's polar and transcellular pathways and the resulting impact on surfactant penetration into the skin. Three anionic surfactant...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1016/j.xphs.2019.06.030
更新日期：2019-11-01 00:00:00
abstract：:The dissolution rates of the two polymorphic forms of sulfathiazole containing polyethylene glycol 4000 were significantly different in water. The effect of agitation on the dissolution rates also was studied. At higher stirring speeds, the dissolution rates of the stable form were affected more than the metastable fo...
journal_title：Journal of pharmaceutical sciences
pub_type： 杂志文章
doi：10.1002/jps.2600650233
更新日期：1976-02-01 00:00:00
