Single-cell sequencing reveals the features of adaptive immune responses in the liver of a mouse model of dengue fever  

作　　者：Yizhen Yuan Qian Chen Zhe Li Fangzhou Cai Dan Li Wei Wang 

机构地区：[1]National Center of Technology Innovation for Animal Model,State Key Laboratory of Respiratory Health and Multimorbidity,Key Laboratory of Pathogen Infection Prevention and Control(Peking Union Medical College),Ministry of Education,NHC Key Laboratory of Comparative Medicine,Institute of Laboratory Animal Science,Chinese Academy of Medical Sciences(CAMS)&Peking Union Medical College(PUMC),Beijing,China

出　　处：《Animal Models and Experimental Medicine》2025年第1期30-43,共14页动物模型与实验医学(英文)

基　　金：Chinese Academy of Medical Sciences Initiative for Innovative Medicine,Grant/Award Number:2021-I2M-1-035 and 2022-I2M-1-011。

摘　　要：Background:Dengue fever,an acute insect-borne infectious disease caused by the dengue virus(DENV),poses a great challenge to global public health.Hepatic involve-ment is the most common complication of severe dengue and is closely related to the occurrence and development of disease.However,the features of adaptive immune responses associated with liver injury in severe dengue are not clear.Methods:We used single-cell sequencing to examine the liver tissues of mild or se-vere dengue mice model to analyze the changes in immune response of T cells in the liver after dengue virus infection,and the immune interaction between macrophages and T cells.Flow cytometry was used to detect T cells and macrophages in mouse liver and blood to verify the single-cell sequencing results.Results:Our result showed CTLs were significantly activated in the severe liver injury group but the immune function-related signal pathway was down-regulated.The rea-son may be that the excessive immune response in the severe group at the late stage of DENV infection induces the polarization of macrophages into M2 type,and the macrophages then inhibit T cell immunity through the TGF-βsignaling pathway.In ad-dition,the increased proportion of Treg cells suggested that Th17/Treg homeostasis was disrupted in the livers of severe liver injury mice.Conclusions:In this study,single-cell sequencing and flow cytometry revealed the characteristic changes of T cell immune response and the role of macrophages in the liver of severe dengue fever mice.Our study provides a better understanding of the pathogenesis of liver injury in dengue fever patients.

关 键 词：adaptive immunity dengue fever model liver injury single-cell sequencing 

分 类 号：R392[医药卫生—免疫学]