Phase I, Dose-Escalating Study of the Safety and Pharmacokinetics of Inhaled Dry-Powder Vancomycin (AeroVanc) in Volunteers and Patients with Cystic Fibrosis: a New Approach to Therapy for Methicillin-Resistant Staphylococcus aureus.

Abstract:

:Methicillin-resistant Staphylococcus aureus (MRSA) has become a significant acute and chronic respiratory pathogen. While vancomycin is effective against MRSA, its relatively poor penetration into lung secretions and dose-limiting renal toxicity make it less effective in the respiratory setting. As inhaled administration of vancomycin would overcome these limitations, we developed a dry powder formulation suitable for inhalation (AeroVanc). Here, we report a phase I, single-dose, dose-escalating study aimed at demonstrating safety and tolerability of AeroVanc. In part I, 18 healthy subjects received a single dose of 16 mg, 32 mg, or 80 mg of AeroVanc. Two subjects also received a 250-mg dose of intravenous vancomycin. In part 2 of the study, 32 mg and 80 mg AeroVanc were administered to subjects with cystic fibrosis as single doses. There were no serious side effects. A small drop in forced expiratory volume in 1 s (FEV1) was observed in 3 subjects with cystic fibrosis, one of whom required salbutamol. Vancomycin was rapidly absorbed after inhalation. Peak and mean plasma concentrations of vancomycin were dose proportional. The average minimum concentration of vancomycin in sputum remained above the usual MIC values for MRSA for up to 24 h (minimum sputum concentration [Cmin], 32-mg dose = 3.05 μg/ml, 80-mg dose = 8.0 μg/ml). In conclusion, AeroVanc was well tolerated and achieved high levels in sputum with a mean systemic absorption of 49%, making it a potential therapeutic strategy for respiratory infection with MRSA.

authors

Waterer G,Lord J,Hofmann T,Jouhikainen T

doi

10.1128/AAC.01776-19

subject

Has Abstract

pub_date

2020-02-21 00:00:00

issue

3

eissn

0066-4804

issn

1098-6596

pii

AAC.01776-19

journal_volume

64

pub_type

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