2 research outputs found
Optimizing Solubility and Permeability of a Biopharmaceutics Classification System (BCS) Class 4 Antibiotic Drug Using Lipophilic Fragments Disturbing the Crystal Lattice
Esterification
was used to simultaneously increase solubility and
permeability of ciprofloxacin, a biopharmaceutics classification system
(BCS) class 4 drug (low solubility/low permeability) with solid-state
limited solubility. Molecular flexibility was increased to disturb
the crystal lattice, lower the melting point, and thereby improve
the solubility, whereas lipophilicity was increased to enhance the
intestinal permeability. These structural changes resulted in BCS
class 1 analogues (high solubility/high permeability) emphasizing
that simple medicinal chemistry may improve both these properties
Selective Nonsteroidal Glucocorticoid Receptor Modulators for the Inhaled Treatment of Pulmonary Diseases
A class
of potent, nonsteroidal, selective indazole ether-based
glucocorticoid receptor modulators (SGRMs) was developed for the inhaled
treatment of respiratory diseases. Starting from an orally available
compound with demonstrated anti-inflammatory activity in rat, a soft-drug
strategy was implemented to ensure rapid elimination of drug candidates
to minimize systemic GR activation. The first clinical candidate <b>1b</b> (AZD5423) displayed a potent inhibition of lung edema in
a rat model of allergic airway inflammation following dry powder inhalation
combined with a moderate systemic GR-effect, assessed as thymic involution.
Further optimization of inhaled drug properties provided a second,
equally potent, candidate, <b>15m</b> (AZD7594), that demonstrated
an improved therapeutic ratio over the benchmark inhaled corticosteroid <b>3</b> (fluticasone propionate) and prolonged the inhibition of
lung edema, indicating potential for once-daily treatment