摘要
Primary bile acids were reported to augment secretion of chemokine(C-X-C motif)ligand16(CXCL16)from liver sinusoidal endothelial cells(LSECs)and trigger natural killer T(NKT)cellbased immunotherapy for liver cancer.However,abundant expression of receptors for primary bile acids across the gastrointestinal tract overwhelms the possibility of using agonists against these receptors for liver cancer control.Taking advantage of the intrinsic property of LSECs in capturing circulating nanoparticles in the circulation,we proposed a strategy using nanoemulsion-loaded obeticholic acid(OCA),a clinically approved selective farnesoid X receptor(FXR)agonist,for precisely manipulating LSECs for triggering NKT cell-mediated liver cancer immunotherapy.The OCA-nanoemulsion(OCA-NE)was prepared via ultrasonic emulsification method,with a diameter of 184 nm and good stability.In vivo biodistribution studies confirmed that the injected OCA-NE mainly accumulated in the liver and especially in LSECs and Kupffer cells.As a result,OCA-NE treatment significantly suppressed hepatic tumor growth in a murine orthotopic H22 tumor model,which performed much better than oral medication of free OCA.Immunologic analysis revealed that the OCA-NE resulted in augmented secretion of CXCL16 and IFN-g,as well as increased NKT cell populations inside the tumor.Overall,our research provides a new evidence for the antitumor effect of receptors for primary bile acids,and should inspire using nanotechnology for precisely manipulating LSECs for liver cancer therapy.
基金
financially supported by the National Natural Science Foundation of China(51673189,51973215,51833010and 51520105004)
Ministry of Science and Technology of China(Project 2018ZX09711003-012)
the Program of Scientific Development of Jilin Province(20170101100JC,20180520207JH,20190103112JH,China)
supported by NIH grant CA198999(USA)
作者简介
Corresponding authors:Xuedong Fang,E-mail addresses:fangxuedong@medmail.com.cn;Corresponding authors:Wantong Song,E-mail addresses:wtsong@ciac.ac.cn
