[Activation of specific T lymphocyte induced by artificial antigen presenting cell complex in vitro].
This study was aimed to investigate the effect of artificial antigen-presenting cells (aAPCs) on inducing activation and proliferation of specific T-lymphocytes through stimulating biological function of dendritic cells with aAPCs in vitro. The specific antigen of chronic myeloid leukemia CML-28 was screened as objective antigen peptide by using magnetic microbeads as vector; the CML-28 epitope sequence (Vltfaldsv) was obtained by antigen epitope prediction software; this epitope was coupled with MHC molecule and used as first signal molecule, the B7-1 molecule was used as second signal molecule; these 2 molecules simultaneously were loaded onto surface of magnetic microbeads so as to contract aAPC complex. The bone marrow mononuclear cells were derived from HLA-A2(+) healthy bone marrow donors, CD8(+) T lymphocytes were screened and co-cultured with aAPC complex. During culture the 5, 6-carboxyfluorescein diacetate succinimidyl ester (CFSE) was added and proliferation of T-lymphocytes was detected by CPSE and proliferation level of specific T lymphocytes was detected by flow cytometry. The results showed that the proliferation level of CML-28 specific T lymphocytes obviously increased in experimental group, average level was 17.34 +/- 0.65%, while average level in control was 2.25 +/- 0.43%, there was significant difference between them (p < 0.01). It is concluded that the aAPC complex can mimic human APCs in vitro, and stimulate activation and proliferation of CD8(+) specific T lymphocytes.
Deparment of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China. MHW555@21CN.COM
Han-Wen
HW
Mao
Wen-Li
WL
Liu
Jian-Feng
JF
Zhou
Zhe
Z
Geng
Wei
W
Huang
D000293:Adolescent; D000328:Adult; D017951:Antigen Presentation / Q000276:immunology*; D000938:Antigen-Presenting Cells / Q000276:immunology* / Q000378:metabolism; D000951:Antigens, Neoplasm / Q000276:immunology; D032701:Biomimetics / Q000379:methods*; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D005260:Female; D015789:HLA-A2 Antigen / Q000276:immunology; D006801:Humans; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000276:immunology; D008213:Lymphocyte Activation; D008297:Male; D008875:Middle Aged; D014019:Tissue Donors; D055815:Young Adult
D000951:Antigens, Neoplasm; D015789:HLA-A2 Antigen