T cell immunoglobulin- and mucin-domain-containing molecule-3 （Tim-3） has been reported to participate in the pathogenesis of inflammatory diseases. However, whether Tim-3 is involved in hepatitis B virus （HBV） in...T cell immunoglobulin- and mucin-domain-containing molecule-3 （Tim-3） has been reported to participate in the pathogenesis of inflammatory diseases. However, whether Tim-3 is involved in hepatitis B virus （HBV） infection remains unknown. Here, we studied the expression and function of Tim-3 in a hydrodynamics-based mouse model of HBV infection. A significant increase of Tim-3 expression on hepatic T lymphocytes, especially on CD8^＋ T cells, was demonstrated in HBV model mice from day 7 to day 18. After Tim-3 knockdown by specific shRNAs, significantly increased IFN-γ production from hepatic CD8^＋ T cells in HBV model mice was observed. Very interestingly, we found Tim-3 expression on CD8^＋ T cells was higher in HBV model mice with higher serum anti-HBs production. Moreover, Tim-3 knockdown influenced anti-HBs production in vivo. Collectively, our data suggested that Tim-3 might act as a potent regulator of antiviral T-cell responses in HBV infection. Cellular ＆ Molecular Immunology.展开更多
目的 :检测支气管哮喘小鼠外周血单个核细胞(PBMC)及肺泡灌洗液(BALF)炎性细胞中T细胞免疫球蛋白与黏蛋白域蛋白3(Tim-3)的表达及与Th17/Treg细胞的关系,探讨其在哮喘发病中的作用。方法 :建立小鼠哮喘动物模型,分为哮喘组和对照组。收...目的 :检测支气管哮喘小鼠外周血单个核细胞(PBMC)及肺泡灌洗液(BALF)炎性细胞中T细胞免疫球蛋白与黏蛋白域蛋白3(Tim-3)的表达及与Th17/Treg细胞的关系,探讨其在哮喘发病中的作用。方法 :建立小鼠哮喘动物模型,分为哮喘组和对照组。收集各组小鼠PBMC及BALF炎性细胞,应用实时荧光定量PCR检测PBMCs及BALF炎性细胞中的Tim-3 m RNA水平,流式细胞仪检测CD4细胞中IL-17(CD4+IL-17+)比例反映Th17水平,CD4细胞中CD4+CD25+Fox P3+反映Treg细胞水平;酶联免疫吸附法(ELISA)检测PBMCs上清液中IL-10、IL-17、TGF-β水平,分析Tim-3的表达与Th17/Treg水平的相关性。结果:哮喘组PBMCs及BALF炎性细胞中Tim-3 m RNA水平、CD4+IL-17+表达及Th17/Treg比例、IL-17均高于对照组(P<0.05),而CD4+CD25+Fox P3+水平、IL-10显著低于对照组。哮喘组PBMCs及BALF炎性细胞中的Tim-3 m RNA表达分别与CD4+IL-17+表达及Th17/Treg比例呈正相关(r=0.76,r=0.87,r=0.71,r=0.82,P<0.05),而与CD4+CD25+Fox P3+的表达呈负相关(r=-0.84,r=-0.79,P<0.05)。结论:哮喘小鼠PBMCs及BALF炎性细胞中Tim-3 m RNA水平显著升高,Tim-3可能在哮喘发生发展中起着重要作用并与Th17/Treg失衡有关。展开更多
Cancer treatment in the past few years has been transformed by a new kind of therapy that targets the immune system instead of the cancer itself to reinvigorate antitumor immunity with astonishing results. However, pr...Cancer treatment in the past few years has been transformed by a new kind of therapy that targets the immune system instead of the cancer itself to reinvigorate antitumor immunity with astonishing results. However, primary and acquired resistance to this type of treatment, namely immune checkpoint blockade(ICB), continue to counter treatment efficacy. In many cases, resistance has been attributed to defective or chronically enhanced interferon signaling and/or upregulation of alternative immune checkpoints,including T-cell immunoglobulin mucin-3(Tim-3) and its ligand galactin-9(Gal-9). In this article, we briefly describe the current knowledge of common checkpoint resistance mechanisms, focusing on the Tim-3/Gal-9 pathway as an alternative checkpoint that holds great promise as another target for ICB.展开更多
Hepatitis B virus(HBV) infection has received increasing public attention. h BV is the prototypical member of hepadnaviruses, which naturally infect only humans and great apes and induce the acute and persistent chron...Hepatitis B virus(HBV) infection has received increasing public attention. h BV is the prototypical member of hepadnaviruses, which naturally infect only humans and great apes and induce the acute and persistent chronic infection of hepatocytes. A large body of evidence has demonstrated that dysfunction of the host anti-viral immune response is responsible for persistent HBV replication, unresolved inflammation and disease progression. Many regulatory factors are involved in immune dysfunction. Among these, T cell immunoglobulin domain and mucin domain-3(Tim-3), one of the immune checkpoint proteins, has attracted increasing attention due to its critical role in regulating both adaptive and innate immune cells. In chronic HBV infection, Tim-3 expression is elevated in many types of immune cells, such as T helper cells, cytotoxic T lymphocytes, dendritic cells, macrophages and natural killer cells. Tim-3 over-expression is often accompanied by impaired function of the abovementioned immunocytes, and Tim-3 inhibition can at least partially rescue impaired immune function and thus promote viral clearance. A better understanding of the regulatory role of Tim-3 in host immunity during HBV infection will shed new light on the mechanisms of h BV-related liver disease and suggest new therapeutic methods for intervention.展开更多
基金supported in part by grants from the National Nature Science Foundation of China (No. 30670966)the National Basic Research Program (No. 2009CB521900)+1 种基金the Taishan Scholar Programthe Scientific Foundation of Innovative Research Team in Shandong University.
文摘T cell immunoglobulin- and mucin-domain-containing molecule-3 （Tim-3） has been reported to participate in the pathogenesis of inflammatory diseases. However, whether Tim-3 is involved in hepatitis B virus （HBV） infection remains unknown. Here, we studied the expression and function of Tim-3 in a hydrodynamics-based mouse model of HBV infection. A significant increase of Tim-3 expression on hepatic T lymphocytes, especially on CD8^＋ T cells, was demonstrated in HBV model mice from day 7 to day 18. After Tim-3 knockdown by specific shRNAs, significantly increased IFN-γ production from hepatic CD8^＋ T cells in HBV model mice was observed. Very interestingly, we found Tim-3 expression on CD8^＋ T cells was higher in HBV model mice with higher serum anti-HBs production. Moreover, Tim-3 knockdown influenced anti-HBs production in vivo. Collectively, our data suggested that Tim-3 might act as a potent regulator of antiviral T-cell responses in HBV infection. Cellular ＆ Molecular Immunology.
文摘目的 :检测支气管哮喘小鼠外周血单个核细胞(PBMC)及肺泡灌洗液(BALF)炎性细胞中T细胞免疫球蛋白与黏蛋白域蛋白3(Tim-3)的表达及与Th17/Treg细胞的关系,探讨其在哮喘发病中的作用。方法 :建立小鼠哮喘动物模型,分为哮喘组和对照组。收集各组小鼠PBMC及BALF炎性细胞,应用实时荧光定量PCR检测PBMCs及BALF炎性细胞中的Tim-3 m RNA水平,流式细胞仪检测CD4细胞中IL-17(CD4+IL-17+)比例反映Th17水平,CD4细胞中CD4+CD25+Fox P3+反映Treg细胞水平;酶联免疫吸附法(ELISA)检测PBMCs上清液中IL-10、IL-17、TGF-β水平,分析Tim-3的表达与Th17/Treg水平的相关性。结果:哮喘组PBMCs及BALF炎性细胞中Tim-3 m RNA水平、CD4+IL-17+表达及Th17/Treg比例、IL-17均高于对照组(P<0.05),而CD4+CD25+Fox P3+水平、IL-10显著低于对照组。哮喘组PBMCs及BALF炎性细胞中的Tim-3 m RNA表达分别与CD4+IL-17+表达及Th17/Treg比例呈正相关(r=0.76,r=0.87,r=0.71,r=0.82,P<0.05),而与CD4+CD25+Fox P3+的表达呈负相关(r=-0.84,r=-0.79,P<0.05)。结论:哮喘小鼠PBMCs及BALF炎性细胞中Tim-3 m RNA水平显著升高,Tim-3可能在哮喘发生发展中起着重要作用并与Th17/Treg失衡有关。
基金National Institutes of Health (CCSG CA16672)Cancer Prevention & Research Institutes of Texas (DP150052 and RP160710)+7 种基金National Breast Cancer Foundation, Inc.Breast Cancer Research Foundation (BCRF-17-069)Patel Memorial Breast Cancer Endowment FundThe University of Texas MD Anderson-China Medical University and Hospital Sister Institution FundMinistry of Science and Technology, International Research-intensive Centers of Excellence in Taiwan (I-RiCE MOST 105-2911-I-002-302)Ministry of Health and Welfare, China Medical University Hospital Cancer Research Center of Excellence (MOHW106-TDU-B-212-144003)Center for Biological Pathways
文摘Cancer treatment in the past few years has been transformed by a new kind of therapy that targets the immune system instead of the cancer itself to reinvigorate antitumor immunity with astonishing results. However, primary and acquired resistance to this type of treatment, namely immune checkpoint blockade(ICB), continue to counter treatment efficacy. In many cases, resistance has been attributed to defective or chronically enhanced interferon signaling and/or upregulation of alternative immune checkpoints,including T-cell immunoglobulin mucin-3(Tim-3) and its ligand galactin-9(Gal-9). In this article, we briefly describe the current knowledge of common checkpoint resistance mechanisms, focusing on the Tim-3/Gal-9 pathway as an alternative checkpoint that holds great promise as another target for ICB.
基金the National Natural Science Fund for Out-standing Youth Fund,No.81425012National Nature Science Foundation of China,No.81100203,No.81371831 and No.91129704Research Fund for the Doctoral Program of Higher Education of China(RFDP),No.20110131110034
文摘Hepatitis B virus(HBV) infection has received increasing public attention. h BV is the prototypical member of hepadnaviruses, which naturally infect only humans and great apes and induce the acute and persistent chronic infection of hepatocytes. A large body of evidence has demonstrated that dysfunction of the host anti-viral immune response is responsible for persistent HBV replication, unresolved inflammation and disease progression. Many regulatory factors are involved in immune dysfunction. Among these, T cell immunoglobulin domain and mucin domain-3(Tim-3), one of the immune checkpoint proteins, has attracted increasing attention due to its critical role in regulating both adaptive and innate immune cells. In chronic HBV infection, Tim-3 expression is elevated in many types of immune cells, such as T helper cells, cytotoxic T lymphocytes, dendritic cells, macrophages and natural killer cells. Tim-3 over-expression is often accompanied by impaired function of the abovementioned immunocytes, and Tim-3 inhibition can at least partially rescue impaired immune function and thus promote viral clearance. A better understanding of the regulatory role of Tim-3 in host immunity during HBV infection will shed new light on the mechanisms of h BV-related liver disease and suggest new therapeutic methods for intervention.
