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| 1 | TNFSF15 facilitates the differentiation of CD11b^(+) myeloid cells into vascular pericytes in tumors显示文摘Objective:Immature vasculature lacking pericyte coverage substantially contributes to tumor growth,drug resistance,and cancer cell dissemination.We previously demonstrated that tumor necrosis factor superfamily 15(TNFSF15)is a cytokine with important roles in modulating hematopoiesis and vascular homeostasis.The main purpose of this study was to explore whether TNFSF15 might promote freshly isolated myeloid cells to differentiate into CD11b^(+) cells and further into pericytes.Methods:A model of Lewis lung cancer was established in mice with red fluorescent bone marrow.After TNFSF15 treatment,CD11b^(+) myeloid cells and vascular pericytes in the tumors,and the co-localization of pericytes and vascular endothelial cells,were assessed.Additionally,CD11b^(+) cells were isolated from wild-type mice and treated with TNFSF15 to determine the effects on the differentiation of these cells.Results:We observed elevated percentages of bone marrow-derived CD11b^(+)myeloid cells and vascular pericytes in TNFSF15-treated tumors,and the latter cells co-localized with vascular endothelial cells.TNFSF15 protected against CD11b^(+)cell apoptosis and facilitated the differentiation of these cells into pericytes by down-regulating Wnt3a-VEGFR1 and up-regulating CD49e-FN signaling pathways.Conclusions:TNFSF15 facilitates the production of CD11b^(+) cells in the bone marrow and promotes the differentiation of these cells into pericytes,which may stabilize the tumor neovasculature. | Xiangxiang Gu Yipan Zhu Cancan Zhao Yixin Cao Jingying Wang Qiangzhe Zhang Luyuan Li | 2023 | Cancer Biology & Medicine2023，20，11： | 0 |
| 2 | Panoramic comparison between NK cells in healthy and cancerous liver through single-cell RNA sequencing显示文摘Objective:NK cells play crucial roles in the immune defense mechanisms against viral infections and transformed cells.However,the developmental progression,transcriptomic landscape,and functional subtypes of liver NK cells are not well defined.Hepatocellular carcinoma(HCC)accounts for approximately 80%of primary liver cancer worldwide,yet the biological characteristics of NK cells in the HCC environment are unclear.Therefore,we aimed to determine these cells’roles in tumorigenesis and prognosis.Methods:We compared the single-cell RNA sequencing profiles of NK cells purified from blood(n=1),healthy liver tissues(n=3),HCC tumor tissues(n=4),and peritumor liver tissues(n=1)to identify NK cell subsets.Furthermore,we performed bioinformatics analysis by using The Cancer Genome Atlas(TCGA)data to identify prognostic biomarkers simultaneously overexpressed in the blood and tumor tissues of patients with HCC.Results:Transcriptomic analysis revealed 5 NK cell subsets(L1-NK-CD56bright,L2-NK-CD56dim,L3-NK-HLA,L4-LrNK-FCGR3A,and L5-LrNK-XCL1)in the healthy liver tissues.However,the transitional L3 subset and the CXCR6+CD16+L4 subset with strong anti-tumor activity were absent in the HCC and peritumor liver tissues.Furthermore,4 common prognosis-associated genes(RHOB,TALDO1,HLA-DPA1,and TKT)were significantly overexpressed in the paired tumor tissue and blood.Conclusions:Our study revealed 5 specific subsets of NK cells in healthy human liver tissues.However,only 3 of the 5 NK cell subsets were present in HCC and peritumor tissues.The cytotoxic NK cell subsets were absent in HCC tissues.Furthermore,we identified 4 potential non-invasive prognostic biomarkers in patients with HCC. | Huan Liu Ronghua Zhao Rongrong Qin Haoyu Sun Qiang Huang Lianxin Liu Zhigang Tian Björn Nashan Cheng Sun Rui Sun | 2022 | Cancer Biology & Medicine2022，19，9： | 0 |
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