Application of gallic acid as well as derivatives and structural analogues thereof in preparation of anti-coronavirus drugs
A technology similar to gallic acid and structure, applied in the field of biomedicine, can solve problems such as discounted antiviral effects of chemical drugs, weakness, and potential safety hazards
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Embodiment 1
[0064] Example 1 Cell half infection dose (TCID 50 ) determination
[0065] 1. Experimental materials
[0066] Virus: 2019-nCoV; cell line: human embryonic kidney cell 293 (HEK293 cells); DMEM medium; 96-well culture plate.
[0067] 2. Experimental steps
[0068] (1) In a centrifuge tube, the virus is diluted 10 times continuously with DMEM medium, starting from 10 -1 to 10 -6 , incubate on ice for 1-2 hours;
[0069] (2) Add virus solutions of different concentrations in a 96-well culture plate, inoculate a vertical row for each dilution, a total of 8 wells, inoculate 100 μl in each well, and add virus-free DMEM medium into two rows as a normal control;
[0070] (3) Digest, suspend, and count cultured human embryonic kidney cells 293 (HEK293 cells), add 100 μl of cell suspension to each well of a virus-containing 96-well plate, and make the cell density 2 to 3×10 5 a / mL;
[0071] (4) 37°C, 5% CO 2 Cultivate in the incubator, observe the cytopathic effect (CPE), until ...
Embodiment 2
[0075] Effect of Example 2 on the activity of HEK293 cells infected by 2019-nCoV virus
[0076] 1. Experimental materials:
[0077] (1) Drugs: See Table 1 for the compounds.
[0078] (2) Other experimental materials
[0079] The virus is 2019-nCoV; the cell line is human embryonic kidney cell 293 (HEK293 cells); DMEM medium; 96-well culture plate.
[0080] 2. Experimental steps
[0081] (1) Take the cell culture solution and dilute the drug into a series of mass concentrations (100, 33.33, 11.11, 3.70, 1.23, 0.41 and 0.00 mg / mL);
[0082] (2) Take another 50TCID 50 The 2019-nCoV virus liquid is neutralized with the above drug solution in equal volume;
[0083](3) After incubating at 37°C for 1 hour, inoculate in HEK293 cells, 100 μL / well, 4 replicate wells for each mass concentration, and set normal cell control group, virus control group and positive control group at the same time, 37°C, 5% CO 2 Cultivate and observe cell morphology;
[0084] (4) After 48 hours, use th...
Embodiment 3
[0090] Embodiment 3 is to the impact of SARS-CoV virus infection HEK293 cell activity
[0091] 1. Experimental materials:
[0092] (1) Drugs: See Table 1 for the compounds.
[0093] (2) Other experimental materials
[0094] The virus is SARS-CoV; the cell line is human embryonic kidney cell 293 (HEK293 cells); DMEM medium; 96-well culture plate.
[0095] 2. Experimental procedure: refer to Example 2.
[0096] 3. Experimental results:
[0097] As shown in Table 3, compounds 1-45 all showed high antiviral activity, and their EC 50 Values range from 3 to 18 μg / ml.
[0098] The EC of table 3 compound on human embryonic kidney cell 293 (HEK293 cell) line that has been infected with SARS-CoV virus 50 value
[0099]
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