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Use of human eddm3a gene and related products

A technology of EDDM3A and gene, which is applied in the application of human EDDM3A gene and related products, can solve the problem of unretrievable EDDM3A reports, etc., and achieve the effect of inhibiting the growth of gastric cancer, inhibiting the ability of metastasis, and promoting cell apoptosis

Inactive Publication Date: 2021-09-28
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are no reports about EDDM3A in tumor-related fields

Method used

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  • Use of human eddm3a gene and related products
  • Use of human eddm3a gene and related products
  • Use of human eddm3a gene and related products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Example 1 Preparation of RNAi lentivirus against human EDDM3A gene

[0115] 1. Screening for effective siRNA targets against the human EDDM3A gene

[0116] Retrieve EDDM3A (NM_006683) gene information from Genbank; design effective siRNA targets for EDDM3A gene. Table 1-1 lists the screened effective siRNA target sequences against the EDDM3A gene.

[0117] Table 1-1 is targeted at the siRNA target sequence of human EDDM3A gene

[0118] SEQ ID NO TargetSeq(5'-3') 1 GGCTGTGTGTATACAGTAA

[0119] 2. Preparation of lentiviral vector

[0120] 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 Chemical Technology Co., Ltd.) to linearize it, and agarose gel electrophoresis identifies the digested fragment.

[0121] Table 1-2 Double-stranded DNA Oligo with sticky...

Embodiment 2

[0139] Example 2 Real-time fluorescent quantitative RT-PCR method to detect gene silencing efficiency

[0140] Human gastric adenocarcinoma cells AGS and human gastric cancer cells MGC80-3 in the logarithmic growth phase were respectively digested with trypsin to make cell suspensions (the number of cells was about 5×10 4 / ml) were inoculated in 6-well plates, and cultured until the cell confluency reached about 30%. According to the multiplicity of infection (MOI: 10 for AGS, 20 for MGC80-3), add an appropriate amount of the lentivirus prepared in Example 1, culture for 24 hours, replace the medium, and collect the cells after the infection time reaches 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...

Embodiment 3

[0147] Example 3 Western Blotting method to detect gene silencing efficiency

[0148] 1. Extraction of total cell protein

[0149] 1) Infect the target cells (AGS and MGC80-3 cells) with the control virus and the RNAi virus targeting the EDDM3A interference target according to the multiplicity of infection (MOI: 10 for AGS, 20 for MGC80-3).

[0150] 2) After 5 days of infection, the cell samples were collected and washed twice with PBS. Take an appropriate amount of RIPA lysate, add PMSF within a few minutes before use, so that the final concentration of PMSF is 1mM. (Use RIPA lysate, instruction link: http: / / www.beyotime.com / ripa-lysis-bufferm.htm).

[0151] 3) Add an appropriate amount of RIPA lysate, and lyse on ice for 10-15 minutes. Scrape the cells and transfer them into a new EP tube, and then ultrasonically disrupt the cells (20 times at 40W, 1 s each time, 2 s apart).

[0152] 4) Centrifuge at 12000g for 15min at 4°C, take the supernatant and use BCA Protein Assay...

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Abstract

The invention belongs to the field of biomedical research, and in particular relates to the use of human EDDM3A gene as a target in the preparation of drugs for treating gastric cancer. After extensive and in-depth research, the present invention finds that down-regulating the expression of human EDDM3A gene by RNAi method can effectively inhibit the proliferation of gastric cancer cells, promote cell apoptosis, and effectively control the growth process of gastric cancer. The siRNA provided by the present invention or the nucleic acid construct containing the siRNA sequence, lentivirus can specifically inhibit the proliferation rate of gastric cancer cells, promote the apoptosis of gastric cancer cells, inhibit the cloning of gastric cancer cells, inhibit the metastasis ability of gastric cancer cells, and inhibit the growth of gastric cancer, thereby treating Gastric cancer, opening up a new direction for the treatment of gastric cancer.

Description

technical field [0001] The invention belongs to the field of biomedical research, and specifically relates to the use of human EDDM3A gene and related products. Background technique [0002] EDDM3A (Epididymis Secretory Sperm Binding Protein) is a sperm-binding protein secreted by epididymis epithelial cells. Testicular spermatozoa originate from the differentiation of spermatogenic stem cells, but are initially incapable of progressive motility and therefore cannot fertilize an egg. The process of sperm maturation in the testis requires exposure to the microenvironment of the epididymis cavity and undergoes a series of changes, including enzyme modification, loss of original components in epididymal secretions, and increase of new glycoproteins. These modified proteins and enzymes are synthesized by the epithelial cells that line the inner wall of the epididymal duct and are secreted to the apex of the lumen, where they then come into contact with and possibly be absorbed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K45/00A61K48/00A61P35/00A61P35/04C12N15/113C12N15/867
CPCA61K45/00A61K48/005A61P35/00A61P35/04C12N15/113C12N15/86C12N2310/14C12N2740/15043C12N2800/107C12N2310/531
Inventor 王楠何显力王萌乔庆吴涛
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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