異體CD3AK細胞治療人腎癌SCID小鼠移植瘤模型的有效性研究
[Abstract]:objective
Renal cell carcinoma (RCC) accounts for 4% of all new cancers in men and 3% of all new cancers in women. Unlike other solid tumors, RCC is insensitive to traditional therapies such as radiotherapy and chemotherapy. In this study, we investigated the in vitro killing effect of anti-CD3 monoclonal antibody activated killer cells (CD3AK) on human renal cell carcinoma cell line OS-RC-2 and its severe association with adoptive cell immunotherapy (ACI). The inhibitory effect of allogeneic CD3AK cells on human renal cell carcinoma xenograft tumor in SCID mice was investigated in vivo, which provided theoretical and experimental support for the clinical application of allogeneic CD3AK cells in the treatment of renal cell carcinoma.
Method
1. Culture and passage of human renal cell carcinoma OS-RC-2 cell line: aseptic cell culture, timely liquid exchange and passage, regular observation of cell morphology and quantity, when the cell entered the logarithmic growth phase, trypan blue staining identified the viability of the experiment.
2. Establish a culture system of CD3AK cells in vitro. Collect peripheral blood mononuclear cells (PBMC) from healthy volunteers and isolate PBMC in vitro to obtain allogeneic CD3AK cells. Flow cytometry was used to detect the phenotype of CD3AK cells.
3.CCK-8 (Cell Counting Kit-8) method was used to detect the killing effect of CD3AK cells on human renal cell carcinoma 0S-RC-2 cell line.
4. Establishment of tumor-bearing model: SCID mice were subcutaneously injected into the left groin to establish a model of human renal cell carcinoma. Allogeneic CD3AK cells were injected into the tail vein, and phosphate buffer solution (PBS) was injected into the tail vein of the control group. The biological characteristics of the mice were observed at a dose of 0.2m1/mouse. They were divided into four groups (n=8): group A (injecting allogeneic CD3AK cells into the anterior and caudal veins of tumor-bearing mice), group B (control group A: injecting PBS into the anterior and caudal veins of tumor-bearing mice), group C (injecting allogeneic CD3AK cells into the posterior tail veins of tumor-bearing mice) and group D (control group C: injecting PBS into the tail veins of tumor-bearing mice). The mice were sacrificed 24 hours after the end of the last treatment, and the spleen was removed by asepsis. The tumor tissues were used for subsequent experiments.
5. Immunohistochemistry was used to detect the expression of CD3+ cells in tumor tissues of mice, and spleen index (spleen weight/body weight) was calculated to observe the inhibitory effect of allogeneic CD3AK cells on the growth of renal tumor and the immune system of mice.
Result
1. Allogeneic CD3AK cells were incubated with human renal cell carcinoma OS-RC-2 cells for 12 hours. CCK-8 assay showed that the cytotoxicity of allogeneic CD3AK cells to OS-RC-2 cells increased with the increase of the ratio of effector cells to target cells.
2. The spleen index of mice in group A and C was significantly higher than that of mice in group B and D (P 0.05), and there was no significant difference between group A and group C (P 0.05).
3. Compared with the control group B, D mice, the weight of tumors in group A, C decreased significantly and the growth of tumors was slow (P 0.05); The weight of mice in group A, C and B, D increased significantly, and the weight of mice in group A and C increased less than that of mice in group B and D (P 0.05).
Compared with group C, mice in group 4.A showed less tumor weight and slower tumor growth (P0.05) than group A mice.
5. Immunohistochemical staining showed that CD3+ cells were positively expressed in tumor tissues of mice in group C, but no positive expression was found in tumor tissues of mice in other groups.
conclusion
1. allogeneic CD3AK cells have an in vitro killing effect on human renal cell carcinoma OS-RC-2 cell line.
2. allogeneic CD3AK cells significantly inhibited the growth of transplanted human renal cell carcinoma SCID mice.
3. allogeneic CD3AK cells have a certain preventive effect on the transplanted tumor of human renal carcinoma SCID mice.
4. allogeneic CD3AK cells can enhance the immune function of human renal cell carcinoma bearing SCID mice and play an anti-tumor role.
【學位授予單位】:山東大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:R737.11
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