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1.
Biomed Pharmacother ; 132: 110816, 2020 Dec.
Article in English | MEDLINE | ID: covidwho-856479

ABSTRACT

After the first case of Coronavirus disease 2019 (COVID-19) was reported in Wuhan, COVID-19 has rapidly spread to almost all parts of world. Angiotensin converting enzyme 2 (ACE2) receptor can bind to spike protein of SARS-CoV-2. Then, the spike protein of SARS-CoV-2 can be cleaved and activated by transmembrane protease, serine 2 (TMPRSS2) of the host cells for SARS-CoV-2 infection. Therefore, ACE2 and TMPRSS2 are potential antiviral targets for treatment of prevention of SARS-CoV-2 infection. In this study, we discovered that 10-250 µg/mL of GB-2, from Tian Shang Sheng Mu of Chiayi Puzi Peitian Temple, can inhibit ACE2 mRNA expression and ACE2 and TMPRSS2 protein expression in HepG2 and 293 T cells without cytotoxicity. GB-2 treatment could decrease ACE2 and TMPRSS2 expression level of lung tissue and kidney tissue without adverse effects, including nephrotoxicity and hepatotoxicity, in animal model. In the compositions of GB-2, we discovered that 50 µg/mL of theaflavin could inhibit protein expression of ACE2 and TMPRSS2. Theaflavin could inhibit the mRNA expression of ACE2. In conclusion, our results suggest that GB-2 and theaflavin could act as potential compounds for ACE2 and TMPRSS2 inhibitors in the further clinical study.


Subject(s)
Angiotensin-Converting Enzyme 2/biosynthesis , Drugs, Chinese Herbal/pharmacology , Serine Endopeptidases/biosynthesis , Angiotensin-Converting Enzyme 2/genetics , Angiotensin-Converting Enzyme Inhibitors/isolation & purification , Angiotensin-Converting Enzyme Inhibitors/pharmacology , Angiotensin-Converting Enzyme Inhibitors/therapeutic use , Animals , COVID-19/drug therapy , COVID-19/epidemiology , Drugs, Chinese Herbal/isolation & purification , Drugs, Chinese Herbal/therapeutic use , Gene Expression/drug effects , HEK293 Cells , Hep G2 Cells , Humans , Male , Mice , Mice, Inbred C57BL , Protease Inhibitors/isolation & purification , Protease Inhibitors/pharmacology , Protease Inhibitors/therapeutic use , SARS-CoV-2 , Serine Endopeptidases/genetics
2.
Endocr Metab Immune Disord Drug Targets ; 20(6): 807-811, 2020.
Article in English | MEDLINE | ID: covidwho-689779
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