Abstract

Objective To investigate the role of class II histidine deacetylase inhibitor (HDACIs) Trichostatin A (TSA) in inhibiting corneal graft rejection. Methods The inhibition rate of TSA on effector T cells and the ratio of TSA-induced regulatory T cells were evaluated with proliferation inhibition assay and Treg cell induction assay, and the survival rate of corneal grafts after TSA treatment was observed. Results The proliferation rates of cells exposed to 1 ng/ml, 5 ng/ml, and 10 ng/ml TSA in the in vitro proliferation inhibition test were (74.60±0.03)%, (26.27±0.01)%, and (25.64±0.03)%, respectively. The ratio of CD25+ Foxp3+ cells exposed to 5 ng/ml and 20 ng/ml TSA in vitro was (3.19±1.32)% and (7.73±1.52)%. In vivo experiment, the survival rate of corneal grafts was the highest in TSA treatment group. Conclusion The survival rate of mouse corneal grafts is improved after TSA treatment. Key words: Histone deacetylase inhibitors; Effector T cells; Regulatory T cells; Corneal transplantation

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