Title

Probing the pharmacokinetics of cucurbit[7, 8 and 10]uril: and a dinuclear ruthenium antimicrobial complex encapsulated in cucurbit[10]uril

RIS ID

114235

Publication Details

Li, F., Gorle, A., Ranson, M., Perrow, K. L., Kinobe, R., Feterl, M., Warner, J. M., Keene, F., Collins, J. & Day, A. I. (2017). Probing the pharmacokinetics of cucurbit[7, 8 and 10]uril: and a dinuclear ruthenium antimicrobial complex encapsulated in cucurbit[10]uril. Organic & Biomolecular Chemistry, 15 (19), 4172-4179.

Abstract

The relatively non-toxic family of cucurbit[n]uril, Q[n], have shown considerable potential in vitro as drug delivery agents, with only a few examples of pharmacokinetic (PK) studies for drug⊂Q[n]. Drug-free Q[n] PK studies are the next step in determining the pharmacological applicability in their drug delivery potential. The results for the first PK and bio-distribution of drug-free 14C-Q[7] are described for administration via intravenous (i.v.) and intraperitoneal (i.p.) dosing. A study of oral administration of drug-free 14C-Q[8] has also been undertaken to determine the time course for the gastrointestinal tract (GIT), absorption and subsequent bio-distribution. Q[10], a potential drug carrier for larger drugs, was evaluated for its effect on the PK profile of a dinuclear ruthenium complex (Rubb12), a potential antimicrobial agent. The Rubb12⊂Q[10] complex and free Rubb12 were administered by i.v. to determine differences in Rubb12 plasma concentrations and organ accumulation. Interestingly, the PK profiles and bio-distribution observed for Q[7] showed similarities to those of Rubb12⊂Q[10]. Drug-free Q[7] has a relatively fast plasma clearance and a generally low organ accumulation except for the kidneys. Drug-free Q[8] showed a low absorption from the GIT into the blood stream but the small percentage absorbed reflected the organ accumulation of Q[7]. These results provide a better understanding of the probable PK profile and bio-distribution for a drug⊂Q[n] through the influence of the drug delivery vehicle and the positive clearance of drug-free Q[n] via the kidneys supports its potential value in future drug delivery applications.

Grant Number

NHMRC/514644

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