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收稿:2018-02-04,
纸质出版:2018-08-30
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陈运凡, 沈俊杰, 钱程. 二肽基肽酶Ⅳ抑制剂对T细胞迁移的影响[J]. 第三军医大学学报, 2018,40(16):1450-1455.
Yunfan CHEN, Junjie SHEN, Cheng QIAN. Effect of dipeptidyl peptidase Ⅳ inhibitor on human T cell migration
陈运凡, 沈俊杰, 钱程. 二肽基肽酶Ⅳ抑制剂对T细胞迁移的影响[J]. 第三军医大学学报, 2018,40(16):1450-1455. DOI: 10.16016/j.1000-5404.201802025.
Yunfan CHEN, Junjie SHEN, Cheng QIAN. Effect of dipeptidyl peptidase Ⅳ inhibitor on human T cell migration
Objective
2
To explore the effect of dipeptidyl peptidase Ⅳ (DPP Ⅳ) inhibitor on human T cell migration
in vitro
.
Methods
2
Flow cytometry was used to detect the expression of CXCR3 in human peripheral T cells from healthy donors.The expression of DPP Ⅳ and CXCL10 in colon cancer LoVo cell line was detected with ELISA.Molecular cloning technique were used to construct LoVo cell lines expressing full-length and DPP Ⅳ-truncated CXCL10 [termed LoVo-CXCL10(1-77) and LoVo-CXCL10(3-77)
respectively].The migration of T cells in response to LoVo cells expressing different forms of CXCL10 and the effect of DPP Ⅳ inhibitor on T cell migration were tested with Transwell assay.
Results
2
CXCR3 was expressed up to 95% on the surface of activated T cells.LoVo cells expressed DPP Ⅳ at a level as high as 1 956.5±95.6 pg/mL but had a low expression level of CXCL10 of 15.5±0.8 pg/mL.The number of migrating T cells in response to LoVo-CXCL10(1-77) cells reached (9.5±0.9)×10
4
significantly higher than the number of T cells attracted by LoVo-CXCL10(3-77) cells.DPP Ⅳ inhibitor significantly increased the migration of T cells in response to LoVo-CXCL10(1-77) to the level of (12.3±0.9)×10
4
.
Conclusion
2
DPP Ⅳ inhibits the chemotaxis of T cells to CXCL10
in vitro
and DPP Ⅳ inhibitor can enhance the migration of T cells toward tumor cells.
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