Subtype analysis and feature detection of peripheral blood Vγ9Vδ2T cells in hepatocellular carcinoma patients / 中华普通外科杂志

ABSTRACT

Objective To investigate the percentage,mature classification and Immune killing function of Vγ9Vδ2T cell in peripheral blood of HCC patients.Methods Peripheral blood mononuclear cells (PBMCs) were isolated from HCC patients (n =25) and healthy donors (n =20) by discontinuous density gradient centrifugation.Proportion,mature and differentiate subtypes and IFN-γ and CD107a expressing of the delta 2 T cells were detect by using flow cytometry,δ2Tcell were selectively cultured with zoledronate and human IL-2.After 12-14 days cells were collected and tested for the second time.Results While the percentage of Vγ9Vδ2Tcell of total T cell in peripheral blood of HCC patients is lower than healthy people before culture (t =4.505,P ＜ 0.001),after augmentation in vitro the proportion increased significantly (t =8.782,P ＜ 0.001),to a level similar to healthy group (t =1.644,P =0.109).There was no statistically significant difference when differentiation subtypes of patient's Vγ9Vδ2Tcell were compared with healthy group before culturing (all P ＞ 0.05),after culture the proportion of Tn,Tcm and Temra decreased [t(Tn) =2.081,t(Tcm) =2.478,t(Temra) =2.953,all P ＜ 0.05],and the proportion of Tem,Tem+ Temra increased [t(Tem) =12.6,t (Tem + Temra) =9.843,all P ＜ 0.001].Cell culture did not alter the proportion of IFN-γ and CD107a secreting Vγ9Vδ2T cells in the peripheral blood in both HCC patients and healthy people (all P ＞ 0.05).Conclusions While the percentage of Vγ9Vδ2T cell of HCC patients in peripheral blood was lower than healthy people,its matured subtypes are similar to those of healthy people,and functions of expressing IFN-γ and CD107a are not different with healthy people.Applying ZOL + IL-2 can amplifyVγ9Vδ2T cells of patients with HCC.