Application of human DSN1 gene and related products
A gene and application technology, applied in the application of human DSN1 gene and related products, can solve problems such as the lack of DSN1 gene, and achieve the effect of inhibiting proliferation, inhibiting the growth of gastric cancer, and controlling the growth process
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Embodiment 1
[0094] Example 1 Preparation of RNAi lentivirus against human DSN1 gene
[0095] 1. Screening for effective siRNA targets against the human DSN1 gene
[0096] Retrieve DSN1 (NM_024918) gene information from Genbank; design effective siRNA targets for DSN1 gene. Table 1-1 lists the screened effective siRNA target sequences against the DSN1 gene.
[0097] Table 1-1 is targeted at the siRNA target sequence of human DSN1 gene
[0098] SEQ ID NO TargetSeq(5'-3') 1 TGAGATGAAGGAATACATA
[0099] 2. Preparation of lentiviral vector
[0100] Aim at the siRNA target (take SEQ ID NO: 1 as an example) to synthesize a double-stranded DNA Oligo sequence (Table 1-2) with Age I and EcoR I restriction sites at both ends; Dicer acts on the pGCSIL-GFP vector (provided by Shanghai Jikai Gene Medical Technology Co., Ltd.) to linearize it, and agarose gel electrophoresis identifies the digested fragments.
[0101] Table 1-2 Double-stranded DNA Oligo with sticky ends contai...
Embodiment 2
[0120] Example 2 Real-time fluorescent quantitative RT-PCR method to detect gene silencing efficiency
[0121] Human gastric cancer AGS cells in the logarithmic growth phase were digested with trypsin to make a cell suspension (the number of cells was about 5×10 4 / ml) were inoculated in a 6-well plate and cultured until the cell confluency reached about 30%. According to the multiplicity of infection (MOI, AGS: 10), an appropriate amount of the lentivirus prepared in Example 1 was added, the culture medium was replaced after 24 hours of culture, and the cells were collected after the infection time reached 5 days. Total RNA was extracted according to the instruction manual of Invitrogen's Trizol. According to the M-MLV instruction manual of Promega Company, RNA was reverse-transcribed to obtain cDNA (see Table 2-1 for the reverse transcription reaction system, react at 42°C for 1 hour, and then bathe in a water bath at 70°C for 10 minutes to inactivate the reverse transcript...
Embodiment 3
[0129] Example 3 Detection of proliferation ability of tumor cells infected with DSN1-siRNA lentivirus
[0130] Human gastric cancer AGS cells in the logarithmic growth phase were digested with trypsin to make a cell suspension (the number of cells was about 5×10 4 / ml) were inoculated in a 6-well plate and cultured until the cell confluency reached about 30%. According to the multiplicity of infection (MOI, AGS: 10), an appropriate amount of virus was added, and the culture medium was replaced after 24 hours of culture. After the infection time reached 5 days, the cells of each experimental group in the logarithmic growth phase were collected. The complete medium was resuspended into a cell suspension (2×10 4 / ml), inoculate a 96-well plate at a cell density of about 3000 / well. 5 replicate wells in each group, 100 μl per well. After laying the board, place at 37°C, 5% CO 2 Incubator cultivation. From the second day after plating, the plate was detected and read once a da...
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