目的:探讨视黄酸早期转录因子1ε(retinoic acid early transcript 1ε,RAE-1ε)和膜型IL-15对小鼠NK细胞杀伤功能的影响。方法:前期研究以小鼠原B淋巴细胞株BaF3为基础构建了3株BaF3工程细胞株,即表达膜型IL-15的BaF3/mb15细胞、表达RA...目的:探讨视黄酸早期转录因子1ε(retinoic acid early transcript 1ε,RAE-1ε)和膜型IL-15对小鼠NK细胞杀伤功能的影响。方法:前期研究以小鼠原B淋巴细胞株BaF3为基础构建了3株BaF3工程细胞株,即表达膜型IL-15的BaF3/mb15细胞、表达RAE-1ε的BaF3/RAE细胞和同时表达膜型IL-15和RAE-1ε的BaF3/mb15/RAE细胞。将γ射线灭活后的3株BaF3工程细胞株作为刺激细胞,分别刺激小鼠NK细胞。流式细胞术检测刺激后NK细胞表面分子的表达,胞内染色法检测NK细胞穿孔素和颗粒酶B的分泌,流式细胞术检测NK细胞对小鼠淋巴瘤YAC1细胞的杀伤活性。结果:与BaF3/mb15和BaF3/RAE细胞相比,BaF3/mb15/RAE细胞可有效上调NK细胞表面CD25、CD44、FasL和CD107a的表达,但对穿孔素和颗粒酶B的分泌没有明显刺激作用。当效靶比为20:1时,BaF3/mb15、BaF3/RAE和BaF3/mb15/RAE细胞刺激后NK细胞对靶细胞YAC1的杀伤率分别为(39.7±2.9)%、(45.3±2.3)%和(59.0±6.9)%,均高于BaF3组的(28.3±1.5)%(P<0.01),且BaF3/mb15/RAE组高于BaF3/mb15和BaF3/RAE组(P<0.05)。结论:膜型IL-15联合RAE-1ε可促进NK细胞活化并增强NK细胞的杀伤活性。展开更多
Objective:To develop a novel artificial antigen-presenting system for efficiently inducing melanoma-specific CD8+CD28+ cytotoxic T lymphocyte（CTL） responses.Methods:Cell-sized Dynabeads? M-450 Epoxy beads coated wit...Objective:To develop a novel artificial antigen-presenting system for efficiently inducing melanoma-specific CD8+CD28+ cytotoxic T lymphocyte（CTL） responses.Methods:Cell-sized Dynabeads? M-450 Epoxy beads coated with H-2Kb:Ig-TRP2(181111K and anti-CD28 antibody were used as artificial antigen-presenting cells（aAPCs） lo induce melanoma-specific CD8*CD28’ CTL responses with the help of IL-2I and IL-I5.Dimer staining,proliferation,ELISPOT,and cytotoxicity experiments were conducted to evaluate the frequency and activity of induced CTLs.Results:Dimer staining demonstrated that the new artificial antigen-presenting system efficiently induced melanoma TRP2-specific CD8CD28' CTLs.Proliferation and ELISPOT assays indicated that the induced CTLs rapidly proliferate and produce increased IFN- y under the slimulalion of H-2K:Ig-TRP2-aAPCs,TL-15,and IL-21.In addition,cytoloxicily experiments showed lhat induced CTLs have specific killing activity of target cells.Conclusions:The new artificial antigen-presenting system including aAPCs plus IL-21 and IL-15 can induce a large number of antigen-specific CD8+CD28+ CTLs against the melanoma.Our study provides evidence for a novel adoptive immunotherapy against tumors.展开更多
文摘目的:探讨视黄酸早期转录因子1ε(retinoic acid early transcript 1ε,RAE-1ε)和膜型IL-15对小鼠NK细胞杀伤功能的影响。方法:前期研究以小鼠原B淋巴细胞株BaF3为基础构建了3株BaF3工程细胞株,即表达膜型IL-15的BaF3/mb15细胞、表达RAE-1ε的BaF3/RAE细胞和同时表达膜型IL-15和RAE-1ε的BaF3/mb15/RAE细胞。将γ射线灭活后的3株BaF3工程细胞株作为刺激细胞,分别刺激小鼠NK细胞。流式细胞术检测刺激后NK细胞表面分子的表达,胞内染色法检测NK细胞穿孔素和颗粒酶B的分泌,流式细胞术检测NK细胞对小鼠淋巴瘤YAC1细胞的杀伤活性。结果:与BaF3/mb15和BaF3/RAE细胞相比,BaF3/mb15/RAE细胞可有效上调NK细胞表面CD25、CD44、FasL和CD107a的表达,但对穿孔素和颗粒酶B的分泌没有明显刺激作用。当效靶比为20:1时,BaF3/mb15、BaF3/RAE和BaF3/mb15/RAE细胞刺激后NK细胞对靶细胞YAC1的杀伤率分别为(39.7±2.9)%、(45.3±2.3)%和(59.0±6.9)%,均高于BaF3组的(28.3±1.5)%(P<0.01),且BaF3/mb15/RAE组高于BaF3/mb15和BaF3/RAE组(P<0.05)。结论:膜型IL-15联合RAE-1ε可促进NK细胞活化并增强NK细胞的杀伤活性。
基金supported,in part,by grants from the Program for New Century Excellent Talents in University(NECT-10-0098)the National Natural Scientific Foundation of China(Nos.81072161.81000769.81172139.and 81060183)+3 种基金Programs for Changjiang Scholars and Innovative Research Team in University(No. IRT1119)Innovative Research Team in Guangxi Natural Science Foundation (No.2011-18-5)Fund for Distinguished Young Scholars in Guangxi Natural Science Foundation(2012jjFA40005)Project of science and technology of Guangxi (1140003A-17)
文摘Objective:To develop a novel artificial antigen-presenting system for efficiently inducing melanoma-specific CD8+CD28+ cytotoxic T lymphocyte（CTL） responses.Methods:Cell-sized Dynabeads? M-450 Epoxy beads coated with H-2Kb:Ig-TRP2(181111K and anti-CD28 antibody were used as artificial antigen-presenting cells（aAPCs） lo induce melanoma-specific CD8*CD28’ CTL responses with the help of IL-2I and IL-I5.Dimer staining,proliferation,ELISPOT,and cytotoxicity experiments were conducted to evaluate the frequency and activity of induced CTLs.Results:Dimer staining demonstrated that the new artificial antigen-presenting system efficiently induced melanoma TRP2-specific CD8CD28' CTLs.Proliferation and ELISPOT assays indicated that the induced CTLs rapidly proliferate and produce increased IFN- y under the slimulalion of H-2K:Ig-TRP2-aAPCs,TL-15,and IL-21.In addition,cytoloxicily experiments showed lhat induced CTLs have specific killing activity of target cells.Conclusions:The new artificial antigen-presenting system including aAPCs plus IL-21 and IL-15 can induce a large number of antigen-specific CD8+CD28+ CTLs against the melanoma.Our study provides evidence for a novel adoptive immunotherapy against tumors.
