RT Journal Article
SR Electronic
T1 357 Increased peripheral cd8 t cell responses in sle by low-dose il-2 treatment
JF Lupus Science & Medicine
JO Lupus Sci & Med
FD Lupus Foundation of America
SP A157
OP A157
DO 10.1136/lupus-2017-000215.357
VO 4
IS Suppl 1
A1 R Zhang
A1 J He
A1 X Sun
A1 C Li
A1 Y Gan
A1 Y Zou
A1 Z Li
YR 2017
UL http://lupus.bmj.com/content/4/Suppl_1/A157.2.abstract
AB Background and aims CD8 T cell responses to viral pathogens is crucial for the prompt resolution of acute infections. SLE patients are more likely to have infections due to long-term glucocorticoid and immunosuppressive agent intake. The present study is to evaluate the potential anti-infection effect of low-dose IL-2 in SLE patients.Methods Peripheral blood mononuclear cells from nine refractory SLE patients and 9 health controls (HCs). The disease activities were evaluated by rheumatologist. The frequencies of T cell subsets were assayed by flow cytometry. Virus-specific CD8 T cells responses were determined based on TNF-a IFN-g and Granzyme B producing CD8 T cells upon CMV-EBV-Flu(CEF) viral peptide pool stimulation.Results Most patients showed good clinical responses after low-dose IL-2 treatment (7 out of 9). Clinical improvement was observed with SIR-4 response (6 out of 9), improved complement 3 and 4 serum level (9 out of 9) and decreased anti-ds-DNA serum level (8 out of 9). Functional profiling of CD8 T cells in low-dose IL-2 treated patients revealed increased frequencies of CEF viral peptide specific TNF-a+ and Granzyme-B+ CD8 T cells. Moreover, these patients showed stronger antigen-specific response demonstrated by an increased stimulated/non-stimulate TNF-a-producing CD8 T cells proliferation fold. Compared with HC, SLE patients showed significantly lower frequencies of CEF specific Granzyme-B producing CD8 T cell, and low-dose IL-2 significantly increased the frequency of these Granzyme-B+ CD8 T cells in SLE patients.Conclusions Virus-specific antigen-specific CD8 T cell response could be enhanced upon this treatment which might be potentially valuable in anti-infection in SLE.