Journal of Pharmaceutical Sciences
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Lysozyme-triggered epidermal growth factor release from bacterial cellulose membranes controlled by smart nanostructured films.
A novel wound-dressing biodevice, sensitive to lysozyme, an enzyme commonly found at infected skin wounds, was assembled by the layer-by-layer deposition of nanopolymeric chitosan and alginate films onto oxidized bacterial cellulose membranes incorporated with epidermal growth factor (EGF). Distinct...
Application and validation of an advanced gastrointestinal in vitro model for the evaluation of drug product performance in pharmaceutical d...
Methods to understand and predict the oral bioavailability of drug products are a prioritized research area within the pharmaceutical industry. Models to predict oral bioavailability have the potential to reduce risk, time, and cost in development as well as decrease the need for animal studies. The...
Determination of the optimal cell-penetrating peptide sequence for intestinal insulin delivery based on molecular orbital analysis with self...
We sought to determine the CPP that most effectively enhanced intestinal insulin absorption. An in situ loop absorption study using 26 penetratin analogues suggested that the chain length, hydrophobicity, and amphipathicity of the CPPs, as well as their basicity, contribute to their absorption-enhan...
Effects of submicron particles on formation of micron-sized particles during long-term storage of an interferon-beta-1a solution.
We present evidence that homogeneous submicron particles can influence the growth rate of larger particles upon long-term storage in a temperature-dependent manner. Interferon-beta-1a was thermally stressed at 50°C for 6 h and characterized using nanoparticle tracking analysis (NTA), microflow digi...
Solubility advantage of amorphous pharmaceuticals, part 3: Is maximum solubility advantage experimentally attainable and sustainable?
A method is described for screening compounds that inhibit crystallization in solution to enable more accurate measurement of amorphous drug solubility. Three polymers [polyvinylpyrrolidone, hydroxypropyl methylcellulose, and hydroxypropyl methylcellulose acetate succinate (HPMCAS)] were screened fo...
Prolonged circulation half-life of interferon γ activity by gene delivery of interferon γ-serum albumin fusion protein in mice.
We tried to increase the circulation half-life of IFNγ after its gene delivery by designing a novel fusion protein of IFNγ with mouse serum albumin (MSA). Western blot analysis confirmed that IFNγ-MSA was expressed as a fusion protein, but hardly formed dimer as IFNγ did. The biological activity...
Usefulness of a nanoparticle formulation to investigate some hemodynamic parameters of a poorly soluble compound.
Drug solubility is an important issue when progressing investigational compounds into clinical candidates. The present paper describes the development and characterization of a nanosuspension that was formulated to overcome problems with poor water solubility and possible adverse events caused by cos...
Lengthening of cardiac repolarization in isolated guinea pigs hearts by sequential or concomitant administration of two IKr blockers.
Block of I(Kr) is of major concern in drug safety. The objective of this study was to assess prolongation of cardiac repolarization during the combined use of two I(Kr) blockers when administered concomitantly or sequentially. (1) When isolated hearts from male guinea pigs were perfused concomitantly...
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Polyamidoamine dendrimers can improve the pulmonary absorption of insulin and calcitonin in rats.
The absorption-enhancing effects of polyamidoamine (PAMAM) dendrimers with various generations (G0-G3) and concentrations [0.1%-1.0% (w/v)] on the pulmonary absorption of peptide and protein drugs were studied in rats. Insulin and calcitonin were chosen as models of peptide and prote...