Agonist and application of Toll-like receptors 7 and 8
A technology of agonists and receptors, which is applied in the direction of antiviral agents, medical preparations containing active ingredients, organic active ingredients, etc., can solve the problems of high price and difficult joint use, and achieve good safety, high activation efficiency, Effects with clear targets
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Embodiment 1
[0019] Embodiment 1: Toll-like receptor 7 and 8 agonist example and preparation
[0020] Agonist name: ssRNA120
[0021] Sequence structure: GUCUGAGUGUGUUCUUG
[0022] Modification structure: rG*rU*rC*rU*rG*rA*rG*rU*rG*rU*rG*rU*rU*rC*rU*rU*rG (* is sulfo modification, r is RNA)
[0023] Preparation method: chemical synthesis, entrusted to the United States Integrated DNA technologies (IDT) company. The initial yield was 250 nmoles of RNA oligo, and the purified amount was 45.2 nmoles, or 255.5 μg.
[0024] Configuration: 1) Dilute ssRNA120 with HBS buffer to 0.1 μg / μl;
[0025] 2) Cationic liposome DOTAP is diluted with HBS buffer solution at a ratio of 1:3;
[0026] 3) Mix the above-mentioned step 1 and step 2 reagents at a ratio of 1:2 as a working solution.
Embodiment 2
[0027] Example 2: Determination of ssRNA120's immune activation effect by TLR7 (ELISA method)
[0028] 2.1 Main materials, reagents and equipment:
[0029] 1) Cell line: RAW264.7 (ATCC, USA.).
[0030] 2) Cell culture medium: DMEM (Gibco, Inc., USA).
[0031] 3) Reference reagent: fakeRNA120 (5'-GACAGAGAGAGAACAAG-3')
[0032] ssRNA40 (5'-GCCGUCUGUUGUGUGACUC-3')
[0033] (IDT, Inc. Synthesis)
[0034] 4) Elisa kit: anti-mouse TNF-a (eBioscience, Inc., USA).
[0035] 5) Cell incubator: FORMA 3111.
[0036] 6) Microplate reader: full-wavelength multifunctional microplate reader (Thermo Scientific, USA).
[0037] 2.2 Experimental method: Dilute RAW264.7 cells to 1×10 6 / mL, added to a 96-well plate (200 μL / well), placed at 37 ° C, 5% CO 2 After culturing in the incubator for 2 hours, add 5 μg / ml ssRNA120 as the experimental group; 5 μg / ml ssRNA40 as the positive control group; 5 μg / ml fakeRNA120 as the invalid control group; DOTAP-HBS buffer as the ...
Embodiment 3
[0039] Embodiment 3: ssRNA120 is measured by the immune activation effect of TLR8 (ELISA method)
[0040] 3.1 Main materials, reagents and equipment:
[0041] 1) Cell line: THP-1 (ATCC, USA.).
[0042] 2) Cell culture medium: RPMI1640 (Gibco, Inc., USA).
[0043]3) Elisa kit: anti-human TNF-a and anti-human IL-12p40 (eBioscience, Inc., USA).
[0044] 4) Cell incubator: FORMA 3111.
[0045] 5) Microplate reader: full-wavelength multifunctional microplate reader (Thermo Scientific, USA).
[0046] 3.2 Experimental method: dilute THP-1 cells to 1×10 6 / mL, added to a 96-well plate (200 μL / well), placed at 37 ° C, 5% CO 2 After culturing in the incubator for 2 hours, ssRNA120 was added to the concentration gradient of 1.25, 2.5, 5, 10, and 20 μg / ml to set up the experimental group of each dose; and ssRNA40 was added to this gradient to set up the control group of each dose. Repeat hole. After culturing for 24 hours, the supernatant was collected, and the Elisa experiment was...
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