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第44卷第3期                           南京医科大学学报(自然科学版)
                  2024年3月                   Journal of Nanjing Medical University(Natural Sciences)     ·305 ·


               ·基础研究·

                CCR8在卵巢癌浸润性Treg上的表达与意义



                陶子琦 ,茅晔鹏 ,刘书娜 ,娄鉴芳 ,付                    鑫 ,张     磊 ,严丽娜     1,2,3 ,王  婷 ,王 芳    1,2*
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                南京医科大学第一附属医院检验学部,国家医学检验临床医学研究中心分中心,江苏                                南京   210029;南京市妇幼保健院
                1                              2                                                 3
                妇科,江苏 南京       210004
               [摘   要] 目的:分析趋化因子受体8(C⁃C motif chemokine receptor 8,CCR8)在卵巢癌肿瘤浸润性调节性 T 细胞(regulatory T
                cell,Treg)中的表达,探讨CCR8对Treg分化的作用。方法:构建C57BL/6小鼠卵巢癌细胞ID8荷瘤模型;流式细胞术检测小鼠
                                                              +
                肿瘤组织、脾脏和外周血中 Treg 上 CCR8 的表达比例,CCR8 Treg 上免疫检查点相关蛋白程序性细胞死亡蛋白 1(programmed
                cell death protein 1,PD⁃1)、细胞素性T淋巴细胞抗原4(cytotoxic T⁃lymphocyte antigen 4,CTLA⁃4)、可诱导的T细胞共刺激分子
               (inducible T cell costimulators,ICOS)、淋巴细胞激活基因3(lymphocyte activation gene 3,LAG⁃3)的表达;流式细胞术检测CCR8
                变构抑制剂AZ084加入前后对C57BL/6小鼠脾脏中初始CD4 T细胞向Treg分化的影响。结果:卵巢癌荷瘤小鼠肿瘤中Treg上
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                的CCR8表达相比脾脏、外周血的Treg显著增高;相比CCR8 Treg,CCR8 Treg上免疫检查点相关蛋白表达更高;AZ084有效抑
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                制小鼠脾脏中初始CD4 T细胞向Treg 的分化。结论:CCR8 Treg 在肿瘤浸润性Treg 中占主要比例,CCR8作为卵巢癌浸润性
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                Treg的主要标志物,变构CCR8蛋白可以抑制Treg的分化。靶向消除CCR8 Treg可为改善卵巢癌肿瘤微环境的免疫抑制状态
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                提供新思路。
               [关键词] 卵巢癌;趋化因子受体8;调节性T细胞;趋化因子
               [中图分类号] R737.31                   [文献标志码] A                      [文章编号] 1007⁃4368(2024)03⁃305⁃08
                doi:10.7655/NYDXBNSN230821


                Expression and significance of CCR8 on tumor⁃infiltrating Treg cells in ovarian cancer

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                TAO Ziqi ,MAO Yepeng ,LIU Shu’na ,LOU Jianfang ,FU Xin ,ZHANG Lei ,YAN Li’na          1,2,3 ,WANG
                   1,2           1,2*
                Ting ,WANG Fang
                                              2
                1 Department of Laboratory Medicine,Branch of National Clinical Research Center for Laboratory Medicine,the First
                Affiliated Hospital of Nanjing Medical University,Nanjing 210029;Department of Gynaecology,Nanjing Maternity
                                                                        3
                and Child Health Care Hospital,Nanjing 210004,China
               [Abstract] Objective:To analyze the expression of C⁃C motif chemokine receptor 8(CCR8)in tumor⁃infiltrating regulatory T(Treg)
                cells in ovarian cancer and to investigate the role of CCR8 in Treg cell differentiation. Methods:An ID8 ovarian cancer cell⁃bearing
                model was established in C57BL/6 mice. The flow cytometry was used to detect the expression proportion of CCR8 on Treg in mouse
                tumor tissues,spleens and peripheral blood,and the expression levels of programmed cell death protein 1(PD ⁃ 1),cytotoxic T ⁃
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                lymphocyte antigen 4(CTLA⁃4),inducible T⁃cell costimulator(ICOS)and lymphocyte⁃activation gene 3(LAG⁃3)on CCR8 Treg cells.
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                The flow cytometry was also used to detect the changes in the differentiation ratio of naive CD4 T cells to Treg cells in the spleens of
                C57BL/6 mice before and after the addition of the CCR8 conformational inhibitor AZ084. Results:The expression of CCR8 on Treg
                cells in the tumors of ovarian cancer⁃bearing mice was significantly higher,compared with that in the spleens and peripheral blood.
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                Compared with CCR8 Treg cells,CCR8 Treg cells also had a higher expression of immune checkpoint related proteins. AZ084
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                effectively inhibited the differentiation of naive CD4 T cells into Treg cells in the mouse spleens. Conclusion:CCR8 Treg cells
                constitute the major proportion of tumor⁃infiltrating Treg cells,and CCR8 acts as a primary marker of ovarian cancer⁃infiltrating Treg
                cells. Conformational modulation of the CCR8 protein can inhibit the differentiation ratio of Treg cells. The targeted elimination of

               [基金项目] 国家自然科学基金(82273199);江苏省自然科学基金(BK20221417)
                ∗
                通信作者(Corresponding author),E⁃mail:wangfang@njmu.edu.cn
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