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山东大学学报(医学版) ›› 2016, Vol. 54 ›› Issue (2): 38-43.doi: 10.6040/j.issn.1671-7554.0.2015.798

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乳腺癌MCF-7细胞分泌的血管内皮生长因子诱导血管内皮细胞免疫功能抑制

李冉冉,张鹏飞,袁冰,房菲菲, 韩明勇   

  1. 山东大学附属省立医院肿瘤中心, 山东 济南 250021
  • 收稿日期:2015-08-22 出版日期:2016-02-10 发布日期:2016-02-10
  • 通讯作者: 韩明勇. E-mial:hanmingyong@sina.com E-mail:-mial:hanmingyong@sina.com
  • 基金资助:
    国家自然科学基金(81272351)

Breast tumor deriving VEGF induces vascular endothelial cells to suppress immune functions

LI Ranran, ZHANG Pengfei, YUAN Bing, FANG Feifei, HAN Mingyong   

  1. Cancer Therapy and Research Center, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
  • Received:2015-08-22 Online:2016-02-10 Published:2016-02-10

摘要: 目的 探讨乳腺癌细胞MCF-7分泌的血管内皮生长因子(VEGF)对血管内皮细胞(VEC)的免疫抑制作用。 方法 人脐静脉血管内皮细胞(HUVEC)生长至70%~80%融合,随机分为Media组、T-sup组、VEGF组、SU5416组。酶联免疫吸附法(ELISA)检测各组中细胞因子VEGF、前列腺素E2(PGE2)、白介素-6(IL-6)和白介素-12(IL-12)表达水平,CCK-8、酶联免疫斑点测定法(ELISPOT)及流式细胞术检测Media组与T-sup组HUVEC培养上清对人外周血单个核细胞(PBMC)免疫功能的影响。 结果 T-sup组VEGF、PGE2和IL-6表达水平较Media组升高(P<0.05),IL-12水平降低(P<0.05)。T-sup组HUVEC培养上清能够促进T细胞凋亡,并抑制IFN-γ表达和CD8+ T细胞活化。VEGF组中VEGF、PGE2和IL-6水平较Media组升高,IL-12水平降低,SU5416组中各因子的表达水平与Media组比较差异无统计学意义(P>0.05)。 结论 乳腺癌MCF-7细胞诱导VEC免疫功能抑制,其免疫抑制作用与VEGF相关。

关键词: 乳腺肿瘤, 免疫抑制, 血管内皮细胞, 血管内皮生长因子

Abstract: Objective To explore the effect of breast tumor deriving vascular endothelial growth factor(VEGF)on the immune functions of vascular endothelial cells(VEC). Methods Human umbilical vein endothelial cells(HUVEC)were divided into 4 groups: Media group, T-sup group, VEGF group and SU5416 group. The levels of VEGF, PGE2, IL-6 and IL-12 in 24 h conditioned cultural supernatants were assayed by ELISA. Experiments of CCK-8, ELISPOT and flow cytometry were processed on peripheral blood T cells after treatment with the 24 h conditioned cultural supernatants. Results The levels of VEGF, PGE2 and IL-6 were increased in the T-sup group, compared with those in Media group(P<0.05), and the level of IL-12 was decreased in the T-sup group(P<0.05). Compared with Media group, the conditioned media in T-sup group promoted the apoptosis of T-lymphocytes, suppressed the expression of IFN-γ, and reduced the production of IFN-γ in CD8+ T cells. The levels of VEGF, PGE2 and IL-6 were increased and the level of IL-12 was decreased in the VEGF group, compared with those in Media group. But there were no statistically significant differences after the treatment of SU5416, a VEGF receptor antagonist. Conclusion Breast tumor cells suppress the immune fuctions of VEC, which is closely related with the high expression of VEGF.

Key words: Breast cancer, Vascular endothelial cells, Immune suppression, Vascular endothelial growth factor

中图分类号: 

  • R737.9
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