Kit and method for rapidly detecting DNA methylation
A kit and methylation technology, applied in the field of biomedical testing, can solve the problems of human suffering, incomplete modification, and low repeatability of experiments, and achieve the goals of saving time-consuming consumables, reducing operation steps, and avoiding cross-contamination Effect
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Embodiment 1
[0066] The preparation of embodiment 1 kit
[0067] The three solutions were prepared according to conventional methods.
[0068] Recipe 1 is as follows:
[0069] (1) Modification solution: 5M sodium bisulfite, 5M ammonium bisulfite, 5mM hydroquinone, 2mM MBT (2-mercaptobenzothiazole), 4M guanidine isothiocyanate, 50mM Tris-HCl pH 5.5;
[0070] (2) Cleaning solution: 35% ethanol, 400mM sodium hydroxide, 200mM sodium chloride;
[0071] (3) Washing solution: 10 mM Tris pH 6.8, 80% ethanol.
[0072] The solvent of the three solutions is water.
[0073] Assemble the kit after aliquoting the modification solution, cleaning solution, and washing solution.
[0074] Recipe 2 is as follows:
[0075] (1) Modification solution: 4M sodium bisulfite, 3M ammonium bisulfite, 7mM hydroquinone, 5mM MBT (2-mercaptobenzothiazole), 2.6M guanidine isothiocyanate, 40mM Tris-HCl pH 6.0;
[0076] (2) Cleaning solution: 30% ethanol, 500mM sodium hydroxide, 200mM sodium chloride;
[0077] (3) Wa...
Embodiment 2
[0086] Example 2: Detection of the HOXC9 gene promoter region in oral epithelial cells
[0087] 1. Sampling: Before sampling, rinse your mouth with clean water, then hold a sterilized medical cotton swab in your hand, insert it into your mouth, wipe it from the buccal mucosa on the inner side of your mouth repeatedly for about 5 minutes, take out the cotton swab, and put the cotton swab into EP containing 1ml TE Wash in the tube, centrifuge at 12,000 rpm for 3 minutes, remove the supernatant, and collect oral epithelial cells.
[0088] 2. Cell lysis: Take 500 ul of the modification solution of formula 1 in Example 1 and put it into a 1.5 ml EP tube, add less than or equal to 20 ul of collected oral epithelial cells into the EP tube filled with the modification solution, mix evenly by inversion, With gentle shaking for 30 seconds, the lysed cells became clear.
[0089] 3. Modification: Divide the above modification liquid into 4 parts and put them into 4 PCR tubes, and perform...
Embodiment 3
[0107] Example 3: Detection of the CRABP1 gene promoter region associated with tumor metastasis in tumor tissue slices
[0108] Tissue section dewaxing: use sterilized forceps to slice paraffin tissue about 30-100mm 2 Clip it into a 1.5ml EP tube, add 100ul xylene, flick the EP tube, let it stand at room temperature for 3min, then centrifuge at 13000rpm for 5min, and discard the supernatant with a pipette. Add 100ul of absolute ethanol, centrifuge at 12000rpm for 2min, and discard the supernatant with a pipette. Add 100ul of 75% ethanol, centrifuge at 12000rpm for 2min, carefully discard the supernatant, and dry the sample.
[0109] Cell lysis: Take 500ul of the modified solution of Formula 1 in Example 1 and put it into the EP tube containing the sample, mix by inverting and shaking slightly for 30 seconds, and the cell lysis becomes clear.
[0110] Follow steps 3-6 in Example 2.
[0111] PCR:
[0112] Upstream primer: 5'TTGAGAAGATGAGGAATGGTGA 3' (SEQ ID NO: 3)
[0113] ...
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