Bacterial adhesins as a drug carrier: covalent attachment of K99 fimbriae to 6-methylprednisolone.

A bioadhesive drug delivery system based on the covalent attachment of a therapeutic agent to bacterial fimbriae is described. This approach involves the isolation of the fimbrium K99 as well as the covalent coupling of 6-methylprednisolone to this adhesin via a linker, especially designed to be cleaved by unspecific luminal esterases. Analysis of the conjugate showed a direct correlation between solubility and coupling extent.

Drug-protein conjugates: preparation of triamcinolone-acetonide containing bovine serum albumin/keyhole limpet hemocyanin-conjugates and polyclonal antibodies.

A radioimmunoassay has been developed for the quantitation of triamcinolone-acetonide (TAAc) at the picogram level. For use of TAAc as an antigenic epitope first the drug was hemisuccinoylated at C-21 as confirmed by 13C-NMR- and mass spectroscopy after derivatization. This hapten was conjugated to the carrier-protein bovine serum albumin (BSA) or keyhole limpet hemocyanin (KLH) by different amide-bond generating methods (imidazolide-, carbodiimide-, carbodiimide/sulfo-N-hydroxysuccinimide-, mixed anhydride-method) yielding antigens of quite different conjugation number, solubility and usefulness.

Mycobacterium phlei infection of the foot: a case report.

A case of Mycobacterium phlei infection in the flexor digitorum longus and posterior tibialis tendon of an otherwise healthy adult male is reported. To our knowledge, this is the second reported case in the English literature of human infection by M. phlei.

Preparation and central action of propofol/hydroxypropyl-beta-cyclodextrin complexes in rabbits.

Inclusion complexes of propofol (CAS 2078-54-8) and hydroxypropyl-beta-cyclodextrin (HP-beta-CD) were examined in aqueous solution and in the solid state by phase solubility technique, IR-spectroscopy and differential scanning calorimetry. Solid complexes obtained by kneading method were dissolved in artificial plasma leading to a colloidal solution which was suitable for intravenous administration. In the in vivo studies propofol (15 mg/kg) was given intravenously to rabbits in equimolar doses as cyclodextrin complexes and as Diprivan.