多发性骨髓瘤抗原致敏树突状细胞介导的体外抗瘤活性

目的：探讨多发性骨髓瘤KM3细胞株冻融抗原和弱酸洗脱抗原肽负载树突状细胞（DC）后诱导的特异性细胞毒性T淋巴细胞（CTL）对KM3细胞的杀瘤作用。方法：联合GM-CSF，IL-4和TNF-α，体外诱导单核细胞生成DC，并使其致敏KM3特异性冻融抗原或酸洗脱抗原，然后与自体T淋巴细胞共同培养3d，生成特异性CTL，并采用MTT法检测其对KM3细胞的杀伤率。结果：在细胞因子作用下，体外培养的外周血单个核细胞可诱导分化为成熟的DC；应用KM3肿瘤抗原致敏DC，诱导生成的CTL对KM3肿瘤细胞具有较强的杀伤效应。结论：KM3冻融抗原和酸洗脱抗原激发的DC与自体T淋巴细胞孵育能诱生抗KM3细胞特异性CTL。

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OBJECTIVE: To explore KM3 multiple myeloma (MM) cell line specific cytotoxic T lymphocyte (CTL) response in vitro mediated by autologous dendritic cells (DCs) aroused by KM3 cells' lysates and acid-eluted peptides. METHODS: Monocytes were isolated from the peripheral blood of healthy individuals and MM patients, and were cultured in serum medium with IL-4, GM-CSF, and TNF-alpha to generate DCs. These DCs were pulsed by KM3 cells' lysates or the acid-eluted peptides, then incubated with autologous T lymphocytes for 3 days to induce KM3 cell antigen specific CTL. MTT assay was performed to examine the specific KM3 cells' lysing ability of CTL. RESULTS: DCs were generated in peripheral blood monocytes cultured in the serum medium containing GM-CSF, IL-4, and TNF-alpha. Autologous T lymphocytes induced by IL-2 and DCs pulsed with KM3 cells' lysates or the acid-eluted peptides showed strong killing effect on KM3 cells. CONCLUSION: The DCs pulsed by KM3 cells' lysates or the acid-eluted peptides incubated with autologous T lymphocytes can induce KM3 cell antigen specific CTL.