两株棉铃虫胚胎新细胞系的建立及其对杆状病毒侵染的反应

昆虫细胞系的建立在病毒学和昆虫学等领域的研究和应用中发挥着重要的作用。本研究由棉铃虫Helicoverpa armigera胚胎组织建立了两株细胞系, 分别命名为QB-Ha-E-1和QB-Ha-E-5, 在含10％胎牛血清的TNM-FH培养基中已传代60余代。两株细胞系均以圆形和短梭形细胞为主。DAF鉴定结果表明, 两株细胞系均来源于棉铃虫胚胎, 其扩增谱带与其他几种昆虫细胞系明显不同; QB-Ha-E-1和QB-Ha-E-5的第30代细胞群体倍增时间分别为63.7 h和66.9 h。两株细胞系均能被棉铃虫核型多角体病毒（HaSNPV）感染, 4 d的感染率分别为86.6％和56.5％, 对甘蓝夜蛾Mamestra brassicae核型多角体病毒（MbNPV）7 d的感染率均为15％左右, 但对苜蓿银纹夜蛾Autographa californica核型多角体病毒（AcMNPV）侵染的反应不同。DAPI染色和基因组DNA电泳结果表明, AcMNPV可诱导QB-Ha-E-5细胞发生凋亡, 极少数细胞内可形成多角体, 但不能诱导QB-Ha-E-1细胞发生凋亡, 其感染率为55.3％; 两株细胞系均可被1.25 μg/mL的放线菌素D诱导发生凋亡。两株细胞系具有相同的遗传背景, 但对AcMNPV侵染的反应不同, 可作为昆虫病毒和细胞之间相互关系以及细胞凋亡机制研究的理想材料。

Establishment of two new cell lines from the embryonic tissue of Helicoverpa armigera (Lepidoptera: Noctuidae)and their responses to baculovirus infection

The development of insect cell lines plays a significant role in research and application of virology and entomology. Two new cell lines, i.e., QB-Ha-E-1 and QB-Ha-E-5, were established from the embryonic tissue of Helicoverpa armigera (Lepidoptera: Noctuidae). The cell lines had been subcultured over 60 passages in TNM-FH medium supplemented with 10% fetal bovine serum. Each cell line has two major morphological types, round cells and spindle-shaped cells. DNA amplification fingerprinting (DAF) analysis in...