CD39 serves as a crucial biomarker for neoantigen-specific CD8^(+)T cells and is associated with antitumor activity and exhaustion.However,the relationship between CD39 expression levels and the function of chimeric a...CD39 serves as a crucial biomarker for neoantigen-specific CD8^(+)T cells and is associated with antitumor activity and exhaustion.However,the relationship between CD39 expression levels and the function of chimeric antigen receptor T(CAR-T)cells remains controversial.This study aimed to investigate the role of CD39 in the functional performance of CAR-T cells against hepatocellular carcinoma(HCC)and explore the therapeutic potential of CD39 modulators,such as mitochondrial division inhibitor-1(mdivi-1),or knockdown CD39 through short hairpin RNA.Our findings demonstrated that glypican-3-CAR-T cells with moderate CD39 expression exhibited a strong antitumor activity,while high and low levels of CD39 led to an impaired cellular function.Methods modulating the proportion of CD39 intermediate(CD39^(int))-phenotype CAR-T cells such as mdivi-1 and CD39 knockdown enhanced and impaired T cell function,respectively.The combination of mdivi-1 and CD39 knockdown in CAR-T cells yielded the highest proportion of infiltrated CD39^(int)CAR-T cells and demonstrated a robust antitumor activity in vivo.In conclusion,this study revealed the crucial role of CD39 in CAR-T cell function,demonstrated the potential therapeutic efficacy of combining mdivi-1 with CD39 knockdown in HCC,and provided a novel treatment strategy for HCC patients in the field of cellular immunotherapy.展开更多
目的通过分析1型艾滋病病毒(HIV-1)感染者不同疾病阶段CD39^+PD-1^+CD4^+T淋巴细胞(简称CD39^+PD-1^+CD4细胞)的特点及其与潜伏病毒库形成的关系,探讨CD39^+PD-1^+CD4细胞的临床意义。方法通过流式细胞术检测CD4细胞上CD39及PD-1的表达...目的通过分析1型艾滋病病毒(HIV-1)感染者不同疾病阶段CD39^+PD-1^+CD4^+T淋巴细胞(简称CD39^+PD-1^+CD4细胞)的特点及其与潜伏病毒库形成的关系,探讨CD39^+PD-1^+CD4细胞的临床意义。方法通过流式细胞术检测CD4细胞上CD39及PD-1的表达情况,分析CD39^+PD-1^+CD4细胞与CD4细胞计数、病毒载量及CD4细胞内病毒指标的相关性。通过实时荧光定量聚合酶链反应(PCR)检测免疫重建成功患者(CRs)和免疫重建失败患者(INRs)的HIV库,分析CD39^+PD-1^+CD4细胞与HIV库的关系。结果入组11例健康对照(HCs)和69例HIV-1感染者,其中包括38例未抗病毒治疗(ART)者(TNs)、21例CRs、10例INRs。(1)与HCs相比,TNs组患者CD39^+PD-1^+CD4细胞亚群占比显著升高(平均值0.99%vs.2.50%);与TNs组相比,ART后,CRs组患者的CD39^+PD-1^+CD4细胞亚群占比显著降低(平均值2.50%vs.0.86%);而INRs组患者该细胞亚群占比显著高于CRs组(平均值2.74%vs.0.86%);(2)在TNs组患者中CD39^+PD-1^+CD4细胞亚群占比与CD4细胞计数呈负相关(r=-0.3596,P=0.0266),与病毒载量呈正相关(r=0.4511,P=0.0045);(3)ART两年以上患者CD39^+PD-1^+CD4细胞亚群占比与HIV脱氧核糖核酸(HIV DNA)正相关(r=0.5659,P=0.0473),与细胞相关的未剪接HIV核糖核酸(HIV us RNA)正相关(r=0.6758,P=0.0137)。结论CD39^+PD-1^+CD4细胞与ART后免疫重建失败相关,其机制可能是CD39^+PD-1^+CD4细胞促进HIV建立潜伏病毒库。展开更多
基金supported by grants from the National Natural Science Foundation of China(Nos.82102169,82003252,82202986,82301960)Outstanding Young Talents Seedling Program of Guangdong Hospital of Traditional Chinese Medicine(No.SZ2023QN03)+1 种基金Young Doctor“Sailing”Project of Science and Technology Department of Guangzhou(No.2024A04J3291)Shenzhen Municipal Government of China(No.JCYJ20210324102807019).
文摘CD39 serves as a crucial biomarker for neoantigen-specific CD8^(+)T cells and is associated with antitumor activity and exhaustion.However,the relationship between CD39 expression levels and the function of chimeric antigen receptor T(CAR-T)cells remains controversial.This study aimed to investigate the role of CD39 in the functional performance of CAR-T cells against hepatocellular carcinoma(HCC)and explore the therapeutic potential of CD39 modulators,such as mitochondrial division inhibitor-1(mdivi-1),or knockdown CD39 through short hairpin RNA.Our findings demonstrated that glypican-3-CAR-T cells with moderate CD39 expression exhibited a strong antitumor activity,while high and low levels of CD39 led to an impaired cellular function.Methods modulating the proportion of CD39 intermediate(CD39^(int))-phenotype CAR-T cells such as mdivi-1 and CD39 knockdown enhanced and impaired T cell function,respectively.The combination of mdivi-1 and CD39 knockdown in CAR-T cells yielded the highest proportion of infiltrated CD39^(int)CAR-T cells and demonstrated a robust antitumor activity in vivo.In conclusion,this study revealed the crucial role of CD39 in CAR-T cell function,demonstrated the potential therapeutic efficacy of combining mdivi-1 with CD39 knockdown in HCC,and provided a novel treatment strategy for HCC patients in the field of cellular immunotherapy.
文摘目的通过分析1型艾滋病病毒(HIV-1)感染者不同疾病阶段CD39^+PD-1^+CD4^+T淋巴细胞(简称CD39^+PD-1^+CD4细胞)的特点及其与潜伏病毒库形成的关系,探讨CD39^+PD-1^+CD4细胞的临床意义。方法通过流式细胞术检测CD4细胞上CD39及PD-1的表达情况,分析CD39^+PD-1^+CD4细胞与CD4细胞计数、病毒载量及CD4细胞内病毒指标的相关性。通过实时荧光定量聚合酶链反应(PCR)检测免疫重建成功患者(CRs)和免疫重建失败患者(INRs)的HIV库,分析CD39^+PD-1^+CD4细胞与HIV库的关系。结果入组11例健康对照(HCs)和69例HIV-1感染者,其中包括38例未抗病毒治疗(ART)者(TNs)、21例CRs、10例INRs。(1)与HCs相比,TNs组患者CD39^+PD-1^+CD4细胞亚群占比显著升高(平均值0.99%vs.2.50%);与TNs组相比,ART后,CRs组患者的CD39^+PD-1^+CD4细胞亚群占比显著降低(平均值2.50%vs.0.86%);而INRs组患者该细胞亚群占比显著高于CRs组(平均值2.74%vs.0.86%);(2)在TNs组患者中CD39^+PD-1^+CD4细胞亚群占比与CD4细胞计数呈负相关(r=-0.3596,P=0.0266),与病毒载量呈正相关(r=0.4511,P=0.0045);(3)ART两年以上患者CD39^+PD-1^+CD4细胞亚群占比与HIV脱氧核糖核酸(HIV DNA)正相关(r=0.5659,P=0.0473),与细胞相关的未剪接HIV核糖核酸(HIV us RNA)正相关(r=0.6758,P=0.0137)。结论CD39^+PD-1^+CD4细胞与ART后免疫重建失败相关,其机制可能是CD39^+PD-1^+CD4细胞促进HIV建立潜伏病毒库。