摘要
目的观察人IL-15cDNA在腺癌细胞内的表达。方法将人IL-15cDNA于EcoRI、BamHI位点正向克隆到逆转录病毒载体pLXSN,构建pL-IL-15-SN的重组质粒。以Lipofectin介导将该重组质粒转染到人肺鳞癌细胞(PG细胞系)和小鼠肺腺癌细胞(LA795细胞系)。经G418条件培养筛选,获得阳性细胞克隆。再经CTLL-2细胞增殖法测阳性细胞IL-15的表达活性。结果获得3个PG细胞和4个LA795细胞阳性克隆,IL-15活性测定显示其表达水平在24h内分别在142~201或138~178U/(ml·106细胞)。结论IL-15cDNA转导的人和小鼠肺癌细胞可表达有生物学活性的IL-15。
Human interleukin (hIL)-15 expression of lung cancer cell lines trans feeted byrhIL-15 cDNA in vitro was observed. Methods The recombinant plasmid PL-IL-15-SN was established by inserting IL-15 cDNA into vector PLXSN at sites of EcoR I and BamH I. The pLIL-15-SN was trans feeted into human lung squmosuse carcinoma (PG) cell line and murine lungadenocarcinoma (LA795) cell line, respectively. Positive clones were obtained by the selection inG418 conditioned culture. Bioactivity on rIL-15 was detected by depend ant - proliferation ofCTLL-2 cells in vitro. Results Three positive PG and four positive LA795 cell clones were obtained respectively. The results of the assays for hIL-15 bioactivity showed that the expressionlevels of rhIL-15 ranged from 142 to 201 or from 138 to 178U/ (ml. 106) for positive PG cells orLA795 cells, respectively. Conclusions Human and murine lung carcinoma cells transfectedwith IL-15 cDNA can express hIL-15 with bioactivity.
出处
《中国医学科学院学报》
CAS
CSCD
北大核心
1999年第5期368-372,共5页
Acta Academiae Medicinae Sinicae
基金
"863"青年基金!(1995年度)
国家自然科学基金!39570794