Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40001-021-00567-x/MediaObjects/40001_2021_567_Fig4_HTML.png)
Flow cytometric detection of inactivated CD4+ T-cell surface markers. Proportions of A CD3+, B CD28+, C CD25+, D CD69+, E CD71+ and F HLA-DR+ cells. *P < 0.01: compared with the sodium sulphate-pretreated BxPC-3 NC group and BxPC-3-DKK3 group; ** P < 0.01: compared with the BxPC-3-DKK3 group. Data are presented as the mean ± SE of three independent experiments. DKK3, dickkopf-related protein 3; NC, negative control