![]() The novel corona virus or SARS-CoV-2 is commonly spread via little miniscule droplets liberated into the surrounding environment when the infected persons unguardedly sneeze, cough or even talk with people in close contact. By and large, COVID-19 manifests symptoms like other SARS-CoV- infected diseases, advances rapidly towards developing ARDS (acute respiratory distress syndrome) with septic stun, in worst circumstances failure of multiple organs take place because of viral-infection-instigated cytokine storm in the body. ![]() This is a remarkable worldwide war, where hospitals are in the front line and doctors being commanding officers along with the medical support team, are constantly battling against COVID-19. Among infected populations, barely any symptomatic patients recoup without hospitalization and the vast majority of them are hospitalized for extraordinary treatment. A sick individual experiences mild to serious respiratory problems. SARS -CoV-2, is the root cause for the late pandemic, novel coronavirus disease 2019 (COVID-19). Thus, we propose a possible synergistic application of melanin and the enzyme CYP27B1 (regulates vitamin D biosynthesis) as a novel strategy to prevent viral entry through the inactivation of furin protease and aid in boosting our immunity at the cellular and humoral levels. Here, we have envisaged the availability of biological melanin and elucidated the bio-medical potential. On the other hand, furin expression is negatively regulated via 1-α-hydroxylase (CYP27B1), that belongs to vitamin-D pathway and controls cellular calcium levels. In silico analyses have revealed that the intermediates of melanin are capable of binding strongly with the active site of furin protease. Vitamin D is known to enhance the rate of melanin synthesis and this may concurrently regulate the expression of furin expression. ![]() Here, a novel mechanism of melanin mediated host immunity is proposed having potent biotechnological prospects in health care management of COVID-19. The host immunity is the only alternative to prevent and or reduce the infection and mortality rate as well. Since the birth of Christ, in these 2019 years, the man on earth has never experienced a survival challenge from any acellular protist compared to SARS-CoV-2.
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