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Method for forming nerve cells by induction and composition

A technology of composition and glial cells, which can be used in drug combinations, nervous system cells, nervous system diseases, etc., and can solve the problems of long cycle, many steps, and high failure rate.

Inactive Publication Date: 2014-03-26
SHANGHAI GENECHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many steps in the whole process, the cycle is long, the failure rate is high, and the differentiated cells also have the potential risk of tumor formation. These problems are not conducive to the promotion and application of this technology.

Method used

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  • Method for forming nerve cells by induction and composition
  • Method for forming nerve cells by induction and composition
  • Method for forming nerve cells by induction and composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Construction of NeuroD1 lentiviral vector:

[0090] (1) Using the cloned NEUROD1 cDNA as a template, carry out a PCR reaction with amplification primers, and amplify to obtain a PCR product with a size of about 1.1 Kb.

[0091] (2) BamHI and AgeI double enzyme digestion is performed on the PCR product and the viral vector.

[0092] (3) T4 DNA ligase (purchased from Takara Company) was used to perform transformation reaction after ligation.

[0093] (4) Through the identification of transformants, positive clones were selected and sent for testing, and those whose sequencing sequence was consistent with the expected sequence were regarded as correct clones, and named as FUGW-NEUROD1 lentiviral vector.

Embodiment 2

[0095] Packaging of NeuroD1 lentiviral vector:

[0096] (1) Prepare DNA solutions of three plasmids in the lentiviral packaging system (FUGW-NEUROD1 lentiviral vector 20 μg, pCMV-dR8.2 dvpr vector (purchased from Addgene) 15 μg, pCMV-VSV-G vector (purchased from Addgene) 10 μg , mixed with the corresponding volume of Opti-MEM to evenly dilute, adjust the total volume to 2.5ml, and incubate at room temperature for 5 minutes.

[0097] (2) 100 μl of Lipofectamine2000 (purchased from invitrogen) reagent was mixed and diluted with 2.4 ml of Opti-MEM (purchased from invitrogen) in another tube, and incubated at room temperature for 5 minutes.

[0098] (3) Mix the diluted DNA described in (1) with the diluted Lipofectamine2000 described in (2), and gently invert and mix within 5 minutes. Incubate at room temperature for 20 min.

[0099](4) Transfer the mixture of DNA and Lipofectamine 2000 to the culture medium of 293T cells, mix well, and store at 37°C, 5% CO 2 cultured in a cell...

Embodiment 3

[0104] NeuroD1 lentivirus induced glial cells;

[0105] (1) When the glial cell U87 density reached 50%-60%, virus infection was carried out, and the cell culture medium was replaced with serum-free medium before infection.

[0106] (2) According to the MOI value of U87 cells (MOI=5), add an appropriate amount of NEUROD1 lentivirus (number of viruses added = number of cells x MOI value). Observe the cell state after 12 hours: if there is no obvious cytotoxic effect, replace the medium after continuing to culture for 24 hours; if there is obvious cytotoxic effect, replace the medium immediately.

[0107] (3) Medium replacement: Three days after U87 cells were infected with NEUROD1 lentivirus, the original medium was gradually replaced with Neurobasal medium (Invitrogen, 12348-017) containing factor N27 (Invitrogen, 17504-044,) . The replacement method is to keep 1 / 2 of the original medium each time, add 1 / 2 of the fresh Neurobasal medium with N27 factor, and replace the mediu...

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Abstract

The invention discloses a method for forming nerve cells by induction and a composition. The invention provides a method for forming nerve cells by specially inducing colloid cells to differentiate, and specifically the method comprises the following steps: firstly, constructing a NeuroD1 gene on a virus vector, and packaging to obtain virus-like particles with NeuroD1; and after the NeuroD1 virus-like particles are infected with the colloid cells, cultivating for a certain time to differentiate the colloid cells into the nerve cells. The obtained never cells and the composition thereof can have potential value in treating neurodegenerative diseases such as Parkinsonism.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a method and composition for specifically inducing glial cells to transform into neuron cells. Background technique [0002] Stem cells have a very broad application prospect in the field of biomedicine. Embryonic stem cells have the potential of comprehensive differentiation and have become a research hotspot. However, the research on stem cells faces many ethical questions, which seriously affects the research on stem cells. [0003] In 1997, British scientist Wilmut and others transferred the nucleus of sheep somatic cells into enucleated oocytes and developed them into mature individuals - the famous Dolly sheep, thus confirming the possibility of somatic cells reversing into totipotent stem cells in practice. However, oocytes are usually difficult to obtain, and the requirements for micromanipulation of oocytes are very high, which undoubtedly affects the research of stem cells....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N5/0793A61K38/17A61K48/00A61P25/28C12N15/86C12N15/867C12N15/861C12N15/869C12N15/863C12N15/85C12N15/864
Inventor 高博盛一谢胜华吴庆徐述
Owner SHANGHAI GENECHEM
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