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A kind of retinal progenitor cell with the function of treating retinal degeneration and its preparation

A technology of retinal progenitor cells and retinal degeneration, applied in the field of stem cells, can solve the problems of unresolved foreign vectors, cell ethics, immune rejection of teratoma, complications, etc.

Active Publication Date: 2019-04-05
HE EYE HOSPITAL SHENYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some achievements have been made so far, the problem of exogenous vectors has not been resolved, and there is still a long way to go before clinical application
The cells commonly used for treatment mainly include: (1) Embryonic stem cells (ES): It has the ability to differentiate into a variety of cells, but this kind of cells has problems such as ethics, immune rejection and teratoma, and is not suitable for clinical application
(2) Induced pluripotent stem cells (iPS): Refers to the reprogramming of normal mature cells into pluripotent induced stem cells in vitro, which theoretically have the ability to differentiate into multiple directions, but it has problems such as virus integration and abnormal expression
However, the retinal progenitor cells used for injection should be of good quality. Unidentified retinal progenitor cells injected into the vitreous cavity have a high risk of treatment failure, and severe complications may occur

Method used

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  • A kind of retinal progenitor cell with the function of treating retinal degeneration and its preparation
  • A kind of retinal progenitor cell with the function of treating retinal degeneration and its preparation
  • A kind of retinal progenitor cell with the function of treating retinal degeneration and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1 The cultivation of retinal progenitor cells

[0064] Sphere-forming culture of retinal progenitor cells: After the tissue is sterilized, take the retinal tissue, digest it with enzymes, centrifuge at 1000r for 3 minutes, take the precipitate, and use DMEM / F12 basal medium (add N-2 supplement, the concentration is 1:100, Epidermal growth factor EGF, concentration is 10ng / ml, basic growth factor bFGF, concentration is 10ng / ml, L-glutamine, concentration 1:100) mix and count according to 1-2×10 5 / cm 2 Inoculate in low-adsorption T25 culture flasks, place at 37°C, 5% CO 2 Cultured in a constant temperature incubator, the next day the cells formed into spheres.

[0065]Preparation of sodium alginate gel: Use deionized water as the solvent of sodium alginate, first weigh the sodium alginate powder, slowly add the powder into a centrifuge tube containing a small amount of solvent (20ml), and add the powder while adding For the remaining solvent, shake it with a v...

Embodiment 2

[0068] Example 2 Identification of Retinal Progenitor Cells

[0069] The vigorously proliferating fifth-generation retinal progenitor cells cultured in Example 1 were identified by flow cytometry: using TrypLE TM -Express digested retinal progenitor cells, resuspended cells in DPBS and counted according to 0.5×10 5 The amount of cells was evenly distributed to the flow detection tubes, and then the identification antibody (Nestin / Pax6 / / Ki67 / Chx10 / Sox2 / CD38 / HLA-DR) and the isotype control antibody were incubated at room temperature in the dark for 15min, and then added Centrifuge 1ml DMEM / F12 at 500-800rpm for 3min. Resuspend with 30 μL DPBS for detection on the machine.

[0070] Identification antibodies and isotype control antibodies were purchased from BD and Abcam.

[0071] The identification criteria are: the expression of Nestin is greater than 90%; the expression of Pax6 is greater than 70%; the expression of Ki-67 is greater than 60%; the expression of Chx10 is great...

Embodiment 3

[0074] Example 3 Preparation of Retinal Progenitor Cell Preparation

[0075] The retinal progenitor cells with the preservation number CGMCC NO.10419 were suspended in HBSS balanced salt solution, and the cell concentration was 4×10 7 individual / mL.

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Abstract

The invention relates to the technical field of stem cells, in particular to a retinal progenitor cell and a preparation thereof having a function of treating degenerative retinal diseases. The preservation number of the retinal progenitor cell provided by the invention is CGMCC NO.10419; and the retinal progenitor cell, which can keep a good proliferation ability and stem cell properties, can take a good curative effect on treating the degenerative retinal diseases. Experiments show that the retinal progenitor cell that the preservation number is CGMCC NO.10419, as being injected into the vitreous cavities of RCS rats, can take a protective effect and achieve multi-focal visual electric-physiology display on retinal outer nuclear layer cells; and in dark adaptation, potential change conducted by retinal nerve photoreceptor cells in a retinal progenitor cell injection group is more obvious than that in a group which is just injected with an HBSS (Hanks balanced salt solution) buffer solution. A water maze test also indicates that the visual function of the rats in the retinal progenitor cell injection group is improved. In addition, all rats injected with the retinal progenitor cell that the preservation number is CGMCC NO.10419 are free from abnormity.

Description

technical field [0001] The invention relates to the technical field of stem cells, in particular to a retinal progenitor cell capable of treating retinal degeneration and a preparation thereof. Background technique [0002] Retinal degeneration is a type of retinal disease characterized by apoptosis and necrosis of retinal photoreceptor cells and pigment epithelial cells, mainly including atrophic age-related macular degeneration (Age-related macular degeneration, AMD), retinitis pigmentosa ( Retinitis Pigmentosa, RP) and retinal atrophy. Retinal degenerative disease is one of the main blinding diseases at present. Most of them have a genetic predisposition. In the early stage of the disease, the retinal cells appear dysfunctional. As the disease progresses, the retinal neuroepithelium and pigment epithelium gradually undergo apoptosis and atrophy, and vision becomes irreversible. Descending, severe blindness. Because the pathogenesis is mainly cell apoptosis, there is cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N5/0797A61K35/30A61P27/02
Inventor 王卓实张明琦高飞孙岩张东蕾徐玲何伟
Owner HE EYE HOSPITAL SHENYANG
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