Virucidal Effect of PVP-I on COVID-19 and as Well as Safety of Its Application on Nasopharynx & Oropharynx

Introduction:

COVID-19 pandemic is the defining global health crisis of our time and the greatest challenge we have faced since World War Two. We have now reached the tragic milestone of two million deaths, and the human family is suffering under an almost intolerable burden of loss.

Background Information:

1. Description of Bangasafe (proposed name) Oro-Nasal Spray: The spray contains PVP-I is a water-soluble iodophor that consists of a complex between iodine and a solubilizing polymer carrier, polyvinylpyrrolidone. In aqueous solution, a dynamic equilibrium occurs between free iodine, the active virucidal agent, and the PVP-I-complex.
2. Composition: Oro-Nasal spray contains 0.6% PVP-I as an Active Pharmaceutical Ingredients (API) in sterile de-ionized water.
3. Product Development, Quality Control and Quality Assurance: Following aspects of raw materials including API, manufacturing in-process steps, finished product are to be real time monitored and produced in Bangladesh Reference Institute for Chemical Measurements,

• Raw materials characterization: Appearance, solubility, identification, nitrogen content, iodide value, loss on drying, pH, sulphated ash and available iodine.
• Solvent/diluent characterization: pH, conductivity, total organic carbon, heavy metal (Pb, As), endotoxin, microbial count.
• Quality testing in several stages during product development: pH, available iodine, iodide, UV absorbance, potency.
• Impurity profile testing: 1-Vinyl-2-pyrrolidinone, 2-Pyrrolidinone, heavy metal (Pb)
• Accelerated \& real time stability study and shelf-life determination: pH, available iodine, iodide, UV absorbance Up to 3 (three) month at 25C, 30C and 35C

1. Mode of Action: PVP itself has no microbicidal activity but rather delivers the free iodine to target cell membranes. The basic mechanism leads to strong microbicidal activity expressed by multiple modes of action as oxidation of amino acids and nucleic acids that disrupt the microbial metabolic pathways, as well as destabilization of the structural components of cell membranes, causing irreversible damage to the pathogen.
2. Dosage and Administration: Mouth \& Nostril: 2 puffs, in 3-4 hours interval not more than 4 times a day.
3. How Supplied: Oro-nasal spray aqueous solution containing 0.6%PVP-I is supplied in 30ml amber color High Density Poly Ethylene (HDPE) bottle designed for pharmaceutical packaging to provide adequate protection against sun light.

Objectives of the study

1. Primary Objective To assess the virucidal efficacy of 0.6% PVP-I against SARS-CoV-2 in nasopharynx and oropharynx in order to use:

• To prevent viral infection before exposure while visiting and treating COVID-19 patients, attending public gatherings, using public transport etc.
• To prevent viral infection after exposure to COVID-19 patients
• To reduce viral load in nasopharynx and oropharynx of COVID-19 patients which is supposed to reduce viral transmission through respiratory route

1. Secondary Objectives

• To assess the viral load in the nasopharynx and oropharynx before and after application of 0.6% PVP-I of participants of this study.
• To assess the duration of effectivity of 0.6% PVP-I on mucosal surface of participating COVID-19 patients by testing consecutive sample hourly upto 4hr .
• To estimate the shelf-life and stability of 0.6 % PVP-Ioronasal spray.
• To characterize raw materials and impurities for product development and quality control/ assurance
• To measure the safety level of 0.6% PVP-Ioronasal sprayby biochemical analysis of participants blood \& urine This study aims to evaluate virucidal efficacy of 0.6% PVP-I against SARS-CoV-2 amongst humans and its safety that is expected to contribute to save lives during this COVID-19 pandemic.

Methodology Study design It will be a Multicentre, Single blind, Randomized Controlled Trial.The participant will be divided into three groups namely Group A : 768 (384 intervention group and 384 control group) COVID-19 positive, moderately ill admitted patient will receive intervention once (2 puff 0.6% PVP-I in each nostril and mouth).

Step 1: Enrollment of the study populations by applying inclusion and exclusion criteria Step 2: Randomization to allocate experimental and controlled group by using table of random number Step 3: Application of 0.6% PVP-I spray to experimental group and distilled water to control group Step 4: Follow up (waiting for 2-5 minutes) Step 5: Collection of nasopharyngeal and oropharyngealsawab for RT-PCR test for both group Step 6: Observation of the patients for 30 minutes for possible early adverse effects (if any) and subsequent management (if needed).

Step 7: Data collection, processing and analysis by SPSS software.

Group B : 20 asymptomatic to mild Covid -19 patients having multiple comorbidity will receive intervention 4 times (2 puff 0.6% PVP-I containing oronasal spray in to each nostril and mouth).

Step 1: Selection of 20 patients randomly with no or mild symptoms and obtain their consent for the further tests.

Step 2: Collection of 2nd, 3rd and 4th sample from nasopharynx and oropharynx hourly Step 3: Data collection, processing and analysis by SPSS software

Group C : 10 healthy individual who accept intervention 0.6% PVP-I oronasal spray 3-4 times interval but not more than 4 time a day for 30 days.

Step 1: Selection of 10 healthy volunteers randomly for using 0.6% PVP-I Oro-Nasal spray 2 puff inside both nostrils and mouth 3 to 4 times a day for one month.

Step 2: Collection of blood \& urine of participants on day 0, 10, 20, 30 for determination of any change in biochemical marker (thyroid, kidney and liver functions will be done) Step 3: Data collection, processing and analysis by SPSS software

Raw material \& impurities characterization

• PVP-I collection from approved vendor with certificate of analysis (CoA)
• Characterization tests of PVP-I such as appearance, identification, solubility, nitrogen content, iodide value, loss on drying, pH, sulphated ash and available iodine as per BP 2019 are performed in well-equipped lab of BRiCM to review the test results with the acceptance criteria stated in the specification.
• Impurity testing of PVP-I as 1-Vinyl-2-pyrrolidinone, 2-Pyrrolidinone according to British Pharmacopeia (BP) 2019 and heavy metal (Pb) as per AOAC is carried out using HPLC, LC-MS-MS, AAS \& ICPMS.
• Sterile water, the diluent of 0.6% PVP-I solution is characterized by performing the tests of pH, conductivity, total organic carbon, heavy metal (Pb, As) as per AWWA, endotoxin as per EU 85 and microbial count as per AOAC in the well-equipped Microbiology Lab of BRiCM.
• Production of 0.6% PVP-I Oro-nasal spray solution from batch dispensing to final product packing is carried out following the norms of cGMP
• In-process quality assurance/control of the product is done at real time by performing, volume check, pH of the solution, available iodine, UV absorbance as per BP 2019 and packing integrity with necessary primary and secondary packing materials.

Stability Study \& Shelf-life estimation

• Stability studies of the product are carried out at both accelerated condition as well as real time condition as per ICH guidelines applicable for Stability Zone IVa.
• Stability studies at accelerated condition is carried out at 40 deg. C up to 12 months in 2 months interval and stability studies at real time condition is carried out at 25 deg. C up to two years in three months interval.
• Stability indicting parameters such as appearance, pH, available iodine, UV absorbance are included in both stability studies.
• Findings of both accelerated and real time stability studies are used to predict the shelf-life of the product up to two years.

Period of study The study will be carried out during the period of May 2020 to June 2021. Place of study Dhaka Medical College Hospital, Kurmitola General Hospital and Kuwait Moytree Hospital including product development \& quality assurance will be held at Bangladesh Reference Institute for Chemical Measurements (BRiCM) Sampling Technique: Random sampling procedure will be followed using table of random numbers admitted patients of dedicated Covid-19 hospital like KGH, KMH and DMCH will be taken after fulfilling of inclusion and exclusion criteria. Then from interested participants written informed consent will be taken. After ward randomization will be carried out to select intervention group and control group.

Sampling Unit: Individual study subject i.e. selected each participants will be considered as a sample unit.

Data Collection instrument and Technique : After receiving written permission from respective hospital authority face to face interview will also be taken. Study personnel at the site will enter data from source documents corresponding to a subject's visit into the protocol-specific paper CRF (Case report form). All data collected during the course of this study must be reviewed and verified for completeness and accuracy by the Investigator.

Availability and Retention of Investigation Records: The Investigator must provide interim study report with data at every three months interval to the principle investigator. As per requirement study report and data may be provided to BMRC and DGDA. The Investigator must ensure the reliability and availability of source documents from which the information on the CRF will be derived. All study documents (patient files, signed informed consent forms, copies of CRFs, Study File Notebook, etc.) must be kept secured for a period of five years.

Data safety \& Monitoring: Monitoring visits will be conducted by principle investigator, co- investigator as well as the representatives according to Guidelines for GCP. By signing this protocol, the investigator grants permission to the appropriate regulatory authorities to conduct on-site monitoring and/or auditing of all appropriate study documentation.

Subject Confidentiality:In order to maintain subject confidentiality, only a site number, subject number and subject initials will identify all study subjects on CRFs and other documentation submitted to the investigator. Additional subject confidentiality issues (if applicable) are covered in the Clinical Study Agreement.

Risk Management Plan: Bangasafe (proposed name) oro-nasal spray containing comparatively very low concentration (0.6% of PVP-I) is supposed to be safe in oro-nasal application. Moreover, this oro-nasal spray is intended to be used in the selected hospitalized patients under the direct supervision of doctors \& nurses. Therefore, any adverse reaction risk if arises will be managed accordingly with the available facilities in respective hospital without any cost.

• If any discomfort, irritation, burning sensation occur then nasal irrigation with sterile plan water by 50 cc disposable syringe is to be given.
• If any hypersensitivity reaction occurs then anti-histamine and/or steroid is to be given

Clinical Laboratory Measurements Blood Chemistry Profile Blood sample for Group - C participants will be collected and sent to the respective hospitals/BRICM clinical chemistry lab for determining of TSH, FT3, FT4, Serum creatinine, alanine aminotransferase (ALT/SGPT) level including urine test.

Utilization of Results:By providing information and assurance about the efficacy and safety of 0.6% PVP-I , we can inform and encourage people to use it as oronasal spray safely for prevention of COVID-19, as an adjunct to PPE and reduce transmissibility of SARS Cov-2 virus.