Last updated on June 2019

Effect of Exeporfinium Chloride (XF-73) Gel on Nasal S. Aureus in Patients at Risk of Post-op Staphylococcal Infection


Brief description of study

This study looks at the difference between XF-73 and placebo in reducing the carriage of a bacteria S. aureus in the nose before, during and after heart surgery. Only people who normally have S.aureus in their nose will be enrolled onto the study. This will be confirmed by analysis of a nasal swab (a cotton bud placed in the nose) before entering the study. It is expected 200 people will participate in this study. Participation will be confirmed by analysis of a nasal swab (a cotton bud placed in the nose) before entering the study. XF-73 or placebo will be given 5 times, with an equal chance of participants receiving either XF-73 or placebo. During the hospital stay more nasal swabs will be taken to determine the amount of S.aureus present in the participant's nose. Other tests such as blood samples, blood pressure and an examination of the nose and sense of smell will be performed as part of the safety assessment. After the hospital stay participants will be followed up for 30 days or if a device has been inserted into the body as part of the surgery for 90 days to look at the rates of post-operative infection between the placebo and XF-73 groups. The study will run for about 9 months. During this period, an independent data monitoring committee will review the study to make sure that the balance of benefits and risks of participating in the study does not change.

Detailed Study Description

This is a multi-centre, double blind, randomized, placebo-controlled study of multiple applications of a single concentration of XF-73 nasal gel to assess the microbiological effect of XF-73 on commensal S. aureus nasal carriage in patients scheduled for surgical procedures deemed to be at high risk of post-operative S. aureus infection. The study is divided in 4 periods: screening (days -14 to -3) randomization (days -10 to -2), treatment (days -1 and 0) and follow-up (post-last study dose to day 30 or day 90 if an implant is inserted during surgery). Day 0 is the calendar day in which surgery takes place. Only patients who test positive to S. aureus by a centrally-performed rapid diagnostic test will be enrolled in the study. Approximately 200 patients will be randomly allocated in a 1:1 ratio to 0.2% w/w XF-73 nasal gel treatment OR placebo to match XF-73 nasal gel.

The study drug, 0.2% w/w XF-73, or matched placebo will be administered 4 times into each nostril over 24 hours prior to surgery and then a single application immediately upon closure of surgical wound. Additionally, patients may undergo chlorhexidine skin decolonisation ahead of surgery and receive perioperative prophylactic systemic antibiotics in accordance with local practice.

Efficacy will be assessed by S. aureus colonisation from screening to 7 days after surgery as well as by incidence of post-operative staphylococcal infections and use of anti-staphylococcal antibiotics post-surgery. Safety will be assessed by reported adverse events (AEs) from screening up to Day 7 as well as vital signs, physical examination (ENT), clinical laboratory assessments (haematology, clinical chemistry, and urinalysis) and Smell Identification Tests at different time points throughout the study.

The maximum study duration will be 45 or 105 days for each individual (from screening to post-study follow-up visit) depending on whether a foreign implant was inserted during surgery.

An independent data monitoring committee (IDMC) will be set up which will review the safety information from the study, the incidence of post-operative staphylococcal infections and to ensure that the balance of benefits and risks of participating in the study does not change.

Clinical Study Identifier: NCT03915470

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