Possible Mechanisms of Drugs Used in the Treatment of COVID-19: A Pharmacological Perspective

Coronaviruses are a type of virus that can infect both animals and humans. Coronaviruses are divided into thirty-nine species and twenty-seven subgenus in the family Coronaviridae, according to the current classification. Seven of these are known to induce respiratory infections, while four others can cause cold-like symptoms on a regular basis. SARS CoV, MERS-CoV, and SARS CoV-2 infection are three examples of viral rebound. They are to blame for SARS, MERS, and the most recent Coronavirus epidemic discovered in 2019. (COVID-19). The World Health Organization declared the respiratory sickness caused by the SARS-CoV-2 infection to be a pandemic (WHO). For this COVID-19, there are currently no properly shown managements. The virology of SARS-CoV-2 has yielded a large number of therapeutic targets. Remdesivir appears to be the most promising treatment. Currently, COVID-19 is treated with Dexamethasone, Tocilizumab, Remdesivir, Chloroquine and Hydroxychloroquine, Lopinavir, Favipiravir, Niclosamide, Azithromycin, Sarilumab, Baricitinib, Ruxolitinib, Ribavarin, Nitazoxanide, Umifenovir, Camostat, Ciclesonide, Darun They exert their effects through blocking receptors such as IL 6, TMPRSS2, CD147, and AAKI, as well as RNA dependent RNA polymerase, membrane fusion, endocytosis, and proteolysis. The authors of this study looked at the available literature on the SARS-CoV-2 virus and the COVID-19 virus in terms of therapeutic evidence. This in-depth and thorough examination provides an excellent overview of the most up-to-date information on the medications used to treat COVID-19.

A systematic review on hepatoprotective activity of quercetin against various drugs and toxic agents: Evidence from preclinical studies

Quercetin is one of the most abundant flavonoids in human diet that has been reported to exhibit a wide range of pharmacological properties. The biochemical and molecular mechanisms involved in the hepatoprotective activity of quercetin were discussed in this review. Quercetin exhibited hepatoprotective activity against 2-butoxyethanol, acrylamide, acrylonitrile, aflatoxin B1, aroclor-1254, arsenic, sodium arsenite, azathioprine, cadmium chloride, carbon tetrachloride, chlorpyrifos, cyclosporine A, diazinon, dimethylnitrosamine, doxorubicin, epirubicin, ethanol, fenvalerate, isoniazide, rifampicin, lead acetate, lindane, D-galactosamine, methotrexate, methylmercury, nickel sulfate, paracetamol, perfluorooctanoic acid, polychlorinated biphenyls, pyrrolizidine alkaloid clivorine, rotenone, sodium fluoride, streptazotocin, tert-butyl hydroperoxide, thioacetamide, titanium dioxide, tumor necrosis factor-α, tripterygium glycoside, triptolide, ultraviolet A light, concavalin A, bisphenol, and ischemia-induced hepatotoxicity in various animal models due to its antioxidant, free radical-scavenging,anti-inflammatory, antiapoptotic, and cytochrome P450 2E1 (CYP2E1) inhibitory activities. In this review, we provide an overview of the possible mechanisms by which quercetin reduced the hepatotoxicity of different hepatotoxicants. This will help the toxicologists, pharmacologists, and chemists to develop new safer pharmaceutical products with quercetin and other hepatotoxicants.

A comprehensive review on hepatoprotective and nephroprotective activities of chrysin against various drugs and toxic agents

Chrysin belongs to the flavonoids and has been used as traditional medicine from ancient and has been reported to exhibit a wide range of pharmacological properties. The biochemical and molecular mechanisms involved in the hepato- and nephroprotective activities of chrysin were discussed in this review. Chrysin exhibited hepatoprotective activity against 2,3,7,8-tetrachlorodibenzo-p-dioxin, carbon tetrachloride, cisplatin, d-galactosamine, doxorubicin, ethanol, lipopolysaccharide/d-galactosamine, methotrexate, ammonium chloride, paracetamol, diethylnitrosamine, streptozotocin, tert-butyl hydroperoxide, thioacetamide, 2-amino-1-methyl-6-phenylimidazo [4,5-b] pyridine (PhIP), ischemia/reperfusion-induced hepatotoxicity and nephroprotective activity against cisplatin, doxorubicin, paracetamol, gentamicin, streptazotocin, N-nitrosodiethyl amine, 5-fluorouracil, adenine, carbon tetrachloride, copper, 2,3,7,8-tetrachlorodibenzo- p-dioxin, colistin, Nω-nitro-l-arginine-methylester and ethanol in various animal models due to its antioxidant, anti-apoptotic activities. In this review, we provide an overview of the possible mechanisms by which chrysin reduced the hepatotoxicity and nephrotoxicity of different toxicants. This will help the toxicologists, pharmacologists and chemists to develop new safer pharmaceutical products with chrysin and other toxicants.