ZHAO Xiao-dong, et al. Effect of autocrine IL-4 on killing activity of CTL induced by K562[J]. Journal of Chongqing Medical University, 2000,(1):1-3. DOI: 10.13406/j.cnki.cyxb.2000.01.001.
To observe the effect and possible mechanism of IL-4 gene modification on killing activity of K562 -specific CTL
IL-4 cDNA was transduced into K562 cell via the retroviral vector-mediated gene transfer method. G418-resistant clones were obtained and expression of IL-4 of IL-4 gene-engineered and parental K562 cells was determined. Meanwhile
proliferation of normal PBMC cells were assayed by 3H-TdR incorporation and the 51Cr release test
respectively. The results showed that proliferation of normal PBMC and killing activity of CTL induced by IL-4 positive K562 cells were greatly increased. It was concluded that IL-4 gene modification is capable of upregulating the killing activity of K562-specific CTL by possibly enhancing the T lylnphocyte function.