Efficacy and Safety of Drug Combination Therapy of Isotretinoin and Some Antifungal Drugs as A Potential Aerosol Therapy for COVID-19 : An Innovative Therapeutic Approach COVID-19

Efficacy and safety of Drug combination therapy of Isotretinoin and some Anti fungal Drugs as A potential Aerosol therapy for COVID-19 : An innovative therapeutic approach The pandemic of COVID-19 which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) has infected over 2,000,000 people causing over 150,000 deaths.It hasno currently approved treatments.. Airborne SARS-CoV-2 infections in humans initiate from the virus entering nasal and airway epithelial cells through binding to angiotensin-converting enzyme 2 (ACE2). TMPRSS2, a cellular protease that activates the SARS-CoV-2 spike protein, colocalizes with ACE2 and can prime SARS-CoV-2 fusion directly at the plasma membrane. In the lungs, SARS-CoV-2 infects type I and type II alveolar epithelial cells, as well as alveolar macrophages that are among the first producers of pro-inflammatory cytokines. As key components of the immediate antiviral response, type I interferons (here after referred to as IFNs) are crucial for restricting viral replication and spread, through autocrine and paracrine type I IFN receptor (IFNAR) signalling. However, minimal amounts of IFNs have been detected in the peripheral blood or lungs of patients with severe COVID-19 In a mouse model of SARS-CoV infection, local IFN responses in the lungs were delayed relative to peak viral replication, which impeded virus clearance and was associated with the development of CRS . SARS-CoV-2 ORF3b is a potent interferon inhebitor and antagonist Here, we review the molecular mechanisms by which Retinoic acid (isotretinoin) and antifungal drugs can cooperate to induce interferon in covid-19 infected patients A study reported that 13 Cis retinoic acid induced significant upregulation of toll-like receptor 3 resulting in an immune response to dsRNA intermediate which can be partially generated during CoV-2 replication . TLR3 sensitized by dsRNA and cascades of signaling pathways (Interferon-regulatory factor 1 (IRFs) and Nuclear fa