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Semi-Functional Quantitative Flow Cytometry Assay for Lymphocytic Choriomeningitis Virus Titration

Ban YH, Ha SJ

Quantitative PCR and plaque assay are powerful virological techniques used to measure the load of defective or infectious virus in mouse and human. However, these methods display limitations such as...
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Extrinsic Acquisition of CD80 by Antigen-Specific CD8⁺ T Cells Regulates Their Recall Immune Responses to Acute Viral Infection

Son J, Ha SJ

CD80 is mainly expressed on Ag-presenting cells (APCs) as a costimulatory molecule but is also detected on T cells. However, the origin and physiological role of CD80 on CD8⁺ T...
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Metabolic Reprogramming by the Excessive AMPK Activation Exacerbates Antigen-Specific Memory CD8⁺ T Cell Differentiation after Acute Lymphocytic Choriomeningitis Virus Infection

Son J, Cho YW, Woo YJ, Baek YA, Kim EJ, Cho Y, Kim JY, Kim BS, Song JJ, Ha SJ

During virus infection, T cells must be adapted to activation and lineage differentiation states via metabolic reprogramming. Whereas effector CD8⁺ T cells preferentially use glycolysis for their rapid proliferation, memory...
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Re-defining T-Cell Exhaustion: Subset, Function, and Regulation

Im SJ, Ha SJ

Acute viral infection or vaccination generates highly functional memory CD8 T cells following the Ag resolution. In contrast, persistent antigenic stimulation in chronic viral infection and cancer leads to a...
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Enhancing T Cell Immune Responses by B Cell-based Therapeutic Vaccine Against Chronic Virus Infection

Kim MK, Lee A, Hwang YK, Kang CY, Ha SJ

Chronic virus infection leads to the functional impairment of dendritic cells (DCs) as well as T cells, limiting the clinical usefulness of DC-based therapeutic vaccine against chronic virus infection. Meanwhile,...
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Detection of Foreign Antigen-specific CD4+Foxp3+ Regulatory T Cells by MHC Class II Tetramer and Intracellular CD154 Staining

Choi JY, Eo SK

The unrestricted population of CD4+Foxp3+ regulatory T (Treg) cells, which have been known to control the expression of autoimmune diseases and protective immunity to inflammatory reactions, has led to greater...
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