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Recombinant lentiviral vector aiming at hNINL gene RNA (Ribonucleic Acid) interference and preparation thereof

A recombinant lentivirus, RNA interference technology, applied in the field of molecular biology, can solve the problems of easy to cause immune response, non-integration of chromosomes, inability to achieve long-term expression, etc., to achieve the effect of convenient transfection efficiency

Inactive Publication Date: 2012-08-22
CHANGSHU CHANGFU ORGANIC COMPOUND FERTILIZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since retroviral vectors can only infect dividing cells, the length of DNA fragments containing foreign genes does not exceed 8kb; when adenoviral vectors infect cells, the viral DNA is free in the nucleus and does not integrate into the chromosome, so it cannot be stable in vivo Long-term expression, and repeated application is likely to cause immune response

Method used

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  • Recombinant lentiviral vector aiming at hNINL gene RNA (Ribonucleic Acid) interference and preparation thereof
  • Recombinant lentiviral vector aiming at hNINL gene RNA (Ribonucleic Acid) interference and preparation thereof
  • Recombinant lentiviral vector aiming at hNINL gene RNA (Ribonucleic Acid) interference and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: Construction of lentiviral vector for gene hNINL

[0060] 1. Design and synthesis of oligonucleotides

[0061] Using Invitrogen's online RNAi series design software BLOCK-iTRNAiDesigner, design 4 interference target sequences for hNINL gene mRNA sequence (NM_025176.4) (see the table below), and synthesize the corresponding double-stranded DNA (Shanghai Sangon Bioengineering Technology Co., Ltd. Services Ltd). The loop structure in the LV3-shRNA template uses TTCAAGAGA to avoid the formation of termination signals. GATCC was added to the 5' end of the sense strand template, which was complementary to the sticky end formed after digestion with BamHI; AATTC was added to the 5' end of the antisense strand template, which was complementary to the sticky end formed after EcoRI digestion.

[0062] serial code

sequence name

target sequence

N351

hNINL-homo-284

TGTGGCTGTGTTGTCTTCATT

N352

hNINL-homo-810

GATCAAGACGGAGA...

Embodiment 2

[0106] Example 2: Encapsulation of hNINL gene RNA interference recombinant lentivirus

[0107] Take the recombinant virus plasmid pGCSIL-sh-hNINL (20 μg) prepared by high-purity endotoxin-free extraction, helper plasmids pHelper 1.0 (15 μg) and pHelper 2.0 (10 μg), and co-transfect 293T cells according to the instructions of Invitrogen Lipofectamine 2000 .

[0108] 8 hours after transfection, replace with complete medium, at 37°C, 5% CO 2 After continuing to culture in the incubator for 48 hours, the cell supernatant rich in lentiviral particles was collected. Centrifuge at 4000g for 10 minutes at 4°C to remove cell debris and filter the supernatant with a 0.45 μM filter to obtain lentivirus for use, which can meet general cell experiments. If you want to obtain a higher concentration of lentivirus, you can further concentrate and purify it to obtain a high-titer lentivirus concentrate. Pack the virus concentrate and store it at -80°C for a long time. Take one of them and fo...

Embodiment 3

[0118] Example 3: Target cell invasion test and gene expression inhibition effect analysis

[0119] 1. Target cell invasion test

[0120] Human breast cancer cell MCF-7 (purchased from the Cell Resource Center, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences) was subjected to virus infection experiment according to the following steps:

[0121] 1) When MCF-7 cells are cultured to 80-90% confluence in a 10 cm culture dish, the culture medium is poured off, and the cells are washed twice with 3 ml of D-Hank's solution.

[0122] 2) Add 1ml of Trypsin-EDTA solution (0.05%, Gibco), mix well, carefully suck off the trypsin solution, and place it at 37°C for 3-5 minutes.

[0123] 3) Add 2ml of DMEM culture medium and pipette to make the cells form a single-cell suspension.

[0124] 4) Count on a blood cell counting board, according to 10×10 5 Inoculate a 6-well plate at the concentration of cells / well and mix well at 37°C 5% CO 2 Incubate for 24 hours.

...

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Abstract

The invention relates to a recombinant lentiviral vector aiming at hNINL gene RNA (Ribonucleic Acid) interference and preparation thereof. The lentiviral vector aiming at ShRNA of the hNINL gene is experimentally constructed; a synthetic DNA (Deoxyribonucleic Acid) segment aiming at the ShRNA is mediated through the lentiviral vector, and is in cotransfection 293 T cell culture with two vectors of pHelper 1.0 and pHelper 2.0; and after the recombinant lentiviral vector is obtained, a target cell is cotransfected, so that RNA interference aiming at the hNINL gene is realized. The adopted inactive third-generation lentiviral vector (SIN) has the advantages of safety, reliability, capability of infecting nondividing cells, long-duration expression of integrating target genes into target cell gene groups, small immune reaction and the like, and is an ideal vector. According to the lentiviral vector, the interference effect on human breast cancer cells MCF-7 reaches 60-85 percent, so that the recombinant lentiviral vector lays a good experimental foundation for further research of relevant hNINL genes, and can be widely used for in vivo gene treatment and gene function research.

Description

technical field [0001] The invention belongs to the technical fields of molecular biology, biomedicine and genetic engineering, and mainly relates to an RNA interference recombinant lentiviral vector (LV-sh-hNINL) for hNINL (humanNinein-like) gene and its preparation. Background technique [0002] Tumor is a local mass formed by the body under the action of various tumorigenic factors, cells in local tissues lose normal regulation of their growth at the gene level, resulting in clonal abnormal proliferation and insufficient apoptosis. Under the action of tumorigenic factors in vivo and in vitro, the genes of cells mutate, causing normal cells to transform into tumor cells, with abnormal morphology, function and metabolism, thus acquiring new biological characteristics. [0003] At the cellular level, the occurrence of cancer is an extremely accidental event. Genetically, cancer develops from one cell, from a cell that has lost its proliferation control. There are trillions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N15/867C12N15/113C12N15/66
Inventor 殷浩金
Owner CHANGSHU CHANGFU ORGANIC COMPOUND FERTILIZER
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