Indian herbal formulation Kaba Sura Kudineer possesses the most powerful ligands to block ACE2-RBD interaction of SARS-CoV-2 infection

Medicinal herbs play an important role in the primary health care system of developing countries and always uphold the importance of ethnomedicinal studies in the drug discovery process. Indian Siddha practitioners urged people to consume a polyherbal formulation named ‘Kaba Sura kudineer (KSK)’ as a prophylactic measure against COVID-19. To validate the presence of anti-COVID 19 agents if any in KSK, virtual screening of 80 phytochemicals was done by blind docking, fixing the RBD-ACE2 complex as the target using PyRx software. The binding energy of the compounds was calculated using Autodock Vina. The SWISSADME server was used to identify the phytochemicals that obey the Lipinski rule and the blood-brain barrier permeability of the compounds. The outcome of the study revealed that phytochemicals such as diosgenin, diosgenone, coumaperine, bisdemethoxycurcumin, tinocordifolin, isovanillinand 1,8-Cineole displayed hydrogen bond interactions with the complex residues in the interacting site (−8.9 to −5.1 kcal/mol) and were found to obey the Lipinski rule as well as possess blood-brain barrier (BBB) permeability. Based on the highest docking score and the more number of interacting residues at the active site herein we suggest diosgenin and bisdemethoxycurcumin as potential inhibitors of SARS-Co-V-2

Indian herbal formulation Kaba Sura Kudineer possesses the most powerful ligands to block ACE2-RBD interaction of SARS-CoV-2 infection

885-890Medicinal herbs play an important role in the primary health care system of developing countries and always uphold the importance of ethnomedicinal studies in the drug discovery process. Indian Siddha practitioners urged people to consume a polyherbal formulation named ‗Kaba Sura kudineer (KSK)‘ as a prophylactic measure against COVID-19. To validate the presence of anti-COVID 19 agents if any in KSK, virtual screening of 80 phytochemicals was done by blind docking, fixing the RBD-ACE2 complex as the target using PyRx software. The binding energy of the compounds was calculated using Autodock Vina. The SWISSADME server was used to identify the phytochemicals that obey the Lipinski rule and the blood-brain barrier permeability of the compounds. The outcome of the study revealed that phytochemicals such as diosgenin, diosgenone, coumaperine, bisdemethoxycurcumin, tinocordifolin, isovanillinand 1,8-Cineole displayed hydrogen bond interactions with the complex residues in the interacting site (−8.9 to −5.1 kcal/mol) and were found to obey the Lipinski rule as well as possess blood-brain barrier (BBB) permeability. Based on the highest docking score and the more number of interacting residues at the active site herein we suggest diosgenin and bisdemethoxycurcumin as potential inhibitors of SARS-Co-V-2

Polyfunctional CD4 T-cells correlating with neutralising antibody is a hallmark of COVISHIELDTM and COVAXIN® induced immunity in COVID-19 exposed Indians

Abstract Detailed characterisation of immune responses induced by COVID-19 vaccines rolled out in India: COVISHIELDTM (CS) and COVAXIN® (CO) in a pre-exposed population is only recently being discovered. We addressed this issue in subjects who received their primary series of vaccination between November 2021 and January 2022. Both vaccines are capable of strongly boosting Wuhan Spike-specific neutralising antibody, polyfunctional Th1 cytokine producing CD4+ T-cells and single IFN-γ + CD8+ T-cells. Consistent with inherent differences in vaccine platform, the vector-based CS vaccine-induced immunity was of greater magnitude, breadth, targeting Delta and Omicron variants compared to the whole-virion inactivated vaccine CO, with CS vaccinees showing persistent CD8+ T-cells responses until 3 months post primary vaccination. This study provides detailed evidence on the magnitude and quality of CS and CO vaccine induced responses in subjects with pre-existing SARS-CoV-2 immunity in India, thereby mitigating vaccine hesitancy arguments in such a population, which remains a global health challenge