非轉(zhuǎn)染人角膜上皮細胞系的建立、鑒定及其克隆化研究
[Abstract]:Corneal blindness is a common cause of blindness, and more than 4 million patients are in need of treatment in China. Many of these patients were blind due to irreversible changes in human corneal epithelium (HCEP). Although it can be cured by the donation of a corneal graft, it is limited to a serious shortage of the amount of the donor cornea, which makes the vast majority of the patients unable to see the light. Tissue engineering human corneal epithelium (TE-HCEP), as an equivalent substitute for HCEP, is an effective way to solve the problem of insufficient donor cornea and most of the HCEP abnormal patients. The key elements of TE-HCEP in vitro reconstruction include the preparation of the HCEP seed cells with normal structural function and the preparation of the carrier stent with the desired biocompatibility. How to obtain a large number of seed cells that meet the requirements for in vitro reconstruction of TE-HCEP is one of the hot spots in the study. Consecutive human corneal epithelial cells can provide a large number of human corneal epithelial cells (HCEPC), considered to be the ideal source of seed cells, and the HCEPC cell line that has been established is an immortalized cell line transfected with an oncogene due to its potential tumorigenicity, Can't be applied to clinical transplant. The establishment of HCEPC cell line by non-transfection method can provide a sufficient number of normal cells for the in vitro reconstruction of TE-HCEP, but no report of the cell line is established without the transfection of the HCEPC. In order to solve the source problem of the large number of HCEP seed cells required for the in vitro reconstruction of TE-HCEP and the whole-layer cornea, the HCEPC cell line is established by the non-transfection method, in order to create the conditions for the in vitro reconstruction of the TE-HCEP and the whole-layer cornea. In order to establish a non-transfected HCEPC cell line, according to the structural characteristics of human corneal tissue, after enzymatic hydrolysis of the torn human corneal epithelial layer with 0.25% trypsin solution, the upper leather surface was directly applied to the 24-hole plate treated with 0. 01% gelatin, and then added with bFGF, EGF and sulfuric acid after 12h. DMEM/ F12 complete culture solution (20% fetal bovine serum) of osteopsin, permethyl shell polysaccharide and type IV collagen, cultured in a 37 & deg; C, 5% CO2 incubator, and the primary culture of HCEPC was initiated in that culture condition, after the primary start of 3d, i. e., the cell is removed, and the cell monolayer is grown, and the cell is a typical epithelial-like cell, and the cell is a typical epithelial-like cell, and the growth and division are vigorous, and the cells can be stably passaged, and the cells that are recovered after the freeze-storage can still maintain good growth state and proliferation. The cell growth was still good after successive successive generations (over 60 generations), and the non-transfection of the HCEPC cell line was completed. Establishment. The cell property identification of the continuous passage HCEPC is to determine that the established cell line is a HCEPC fine The key of the cell line is that the 90th generation cells of the non-transfected HCEPC cell line, which have been established, were observed by morphological observation, growth characteristic detection, chromosome analysis, cell immunofluorescence and tumorigenicity. The morphological identification of the cell, including the observation of the light and the scanning electron microscope, showed that the cell line of the cell line had a typical epithelial-like cell morphology, and the cell surface was rich in micro-organisms. The results of the analysis of the growth characteristics of the cell line showed that the population doubling time of the cell line was 40. 56h, and the cell division was The number of the characteristic chromosomes of the cell line is 2n = 46, and the chromosome number of the cell line of the cell line is 2n = 46, and the number of the chromosomes has been found. The results of the immunofluorescence test of the HCEP-specific marker protein showed that the cell line cells had positive expression of the cytokeratin K3, K12 and K19, and combined with the results of the karyotype analysis, it was possible to preliminarily determine that the non-transfected cell line established in this paper is the HCE. PC cell line. The results of the tumorigenicity test showed that the cell line did not The cell line established in this article is a non-transfected, non-tumorigenic HCE. PC cell line. In order to screen the normal HCEPC for the number of chromosomes to use HCEP seed cells, this paper uses the established non-transfected HCEPC cell line The cloning of HCEPC cell line was carried out by using a limited dilution method. The cell of HCEPC cell line was cloned and amplified by the mouse peritoneal macrophages, and the monoclonal cell line was selected for chromosome group analysis. A monoclonal cell line with 2n = 46 normal karyotype was selected, named HCEP-5. A1, the cell of the monoclonal cell line is frozen and then recovered, The growth state is good. The expression of the HCEP marker protein, the connexin and the functional protein of the monoclonal cell line cell is detected by immunofluorescence, and the result shows that it has the positive expression of K3 and K12 to prove the HCEPC property, and has the gap connection protein-43 and the whole-linked egg. The positive expression of the white antigen 1 indicates that it has the potential to form a cell communication connection and an anchor connection, can form a complete human corneal epithelial layer, and has a positive expression of a calcium pump PMCA1/ 4 protein and a 14-3-3s protein, indicating that it is provided with a cross-membrane transport and a shape of a normal HCEPC. thus, the screened HCEP-5A1 monoclonal cell line meets the condition that the HCEP-5A1 monoclonal cell line is used as the HCEP seed cell, and can be used for TE-H In conclusion, the non-transfectively non-tumorigenic HCEPC cell line was successfully established, and the normal HCEP seed cells of the chromosome group were selected, the origin of the HCEP seed cell was solved, the in vitro reconstruction of TE-HCEP and the full-angle of the tissue engineering were solved.
【學位授予單位】:中國海洋大學
【學位級別】:碩士
【學位授予年份】:2012
【分類號】:R318.18
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