Photodynamic Therapy for COVID-19 Prevention

Not Applicable

Completed

• Conditions: SARS-CoV-2 Acute Respiratory Disease; COVID-19 Respiratory Infection
• Interventions: Device: Nasal Photodisinfection

• Registration Number: NCT05184205
• Lead Sponsor: Ondine Biomedical Inc.

Brief Summary

This is a single-center open-label study to evaluate antimicrobial photodynamic therapy (aPDT) for upper airway decolonization in patients presenting with SARS-CoV-2 positive antigen test with mild or no symptoms of COVID-19.

Detailed Description

There is a wide variety of people who test positive for SARS-CoV-2. This is directly dependent upon their exposure to the virus, their age and any medical comorbidities that they may have. At this time, it is not possible to predict who will have an adequate immune response to avoid getting COVID-19. Since this remains unpredictable a universal approach to treating SARS-CoV-2 positive patients may be the optimal approach.

The rational for this study design is that in a real world setting numerous patients across a wide variety of conditions will receive testing for SARS-CoV-2 for a variety of reasons. For those who test positive and are asymptomatic or have only mild symptoms, the current standard of care is observation and quarantine. The incubation period can range from 2-14 days with a mean of 5-6 days. Depending upon an individual's original inoculum of virus, comorbidities and other factors they may progress to COVID-19. Preemptive treatment during this time frame may avoid or mitigate COVID-19 disease severity. In certain high-risk individuals attenuating the disease may avoid hospitalization or death, ICU admission and shorten hospital stays.

The nasal disinfection process rapidly and lethally disrupts the microbial cell wall, leaving human tissue unharmed. The topically applied photosensitizer formulation selectively stains bacteria by binding with microbial cell wall components. The red light is absorbed by the photosensitizer molecules, causing electronic state transitions within the photosensitizer. The excited photosensitizer immediately transfers energy to surrounding molecular oxygen, thereby producing reactive oxygen species (ROS) that are responsible for the lethal cell wall disruption.

Study Timeline

• Study Start: 2021-12-20
• Study First Submitted: 2021-12-20
• Study First Submitted QC: 2022-01-06
• Study First Posted: 2022-01-11
• Primary Completion: 2022-04-30
• Study Completion: 2022-05-30
• Status Verified: 2022-08
• Last Update Submitted: 2022-08-10
• Last Update Posted: 2022-08-12

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

1. Provision of signed and dated informed consent form
2. Stated willingness to comply with all study procedures and availability for the duration of the study
3. Male or female ≥ 18 years of age
4. Patient showing a positive test for SARS-CoV-2 with < 26 Ct of an FDA-approved PCR test who is symptomatic or flu-like illness or pneumonia
5. Ability to tolerate an 12-minute non-painful nasal light illumination

Exclusion Criteria

1. Inability to tolerate insertion of the light illuminator due to oronasal size, shape, or anatomical variants
2. Known allergic reactions to components of the nasal decolonization treatment including methylene blue or chlorhexidine gluconate.
3. COVID-19 illness that is moderate or severe in nature.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Active Intervention	Nasal Photodisinfection	The procedure is initiated by swabbing the Formulation Applicator, pre-saturated with photosensitizer formulation, inside the patient's nares. The operator then connects the Nasal Light Illuminator (NLI) to the Light Source and inserts the NLIs into the patient's nostrils. The Light Source is turned on, and a 4-minute illumination cycle provides two channels of diffused red light (one for each nostril) to activate the applied formulation. Illumination stops automatically upon completion of the 4-minute cycle. The process is then repeated using two new Formulation Applicators to ensure full disinfection coverage.

Primary Outcome Measures

Name	Time	Method
SARS-CoV-2 viral titer reduction	Immediately following treatment and on days 3, 7, and 14.	Change from baseline PCR count with testing on days 3, 7 and 14

Secondary Outcome Measures

Name	Time	Method
General safety of nasal photodisinfection	14 days post treatment	Observation for any adverse events

Trial Locations

Locations (1)

Clinica Universidad de Navarra; 🇪🇸 Pamplona, Spain