目的 探讨急性缺血性脑卒中(AIS)患者血浆环状RNA(Circ)OGDH、CircHECTD1表达及临床意义。方法 选取2020年12月至2022年12月该院收治的112例AIS患者为AIS组,以同期参加体检的60例健康者为对照组。根据随访出院3个月时AIS患者是否存在血...目的 探讨急性缺血性脑卒中(AIS)患者血浆环状RNA(Circ)OGDH、CircHECTD1表达及临床意义。方法 选取2020年12月至2022年12月该院收治的112例AIS患者为AIS组,以同期参加体检的60例健康者为对照组。根据随访出院3个月时AIS患者是否存在血管性认知功能障碍(VCI)分为VCI组(60例)和非VCI组(52例);根据随访出院3个月时AIS患者的预后情况分为预后良好组(87例)和预后不良组(25例)。采用实时荧光定量PCR检测各组血浆CircOGDH、CircHECTD1表达。采用简易智能精神量表(MMSE)、蒙特利尔认知评估量表(MoCA)及美国国立卫生研究院卒中量表(NIHSS)评分评估AIS患者VCI及神经功能障碍程度。采用Pearson相关分析血浆CircOGDH、CircHECTD1与临床参数的相关性。采用多因素Logistic回归分析影响AIS患者预后不良的因素。采用受试者工作特征(ROC)曲线分析CircOGDH、CircHECTD1单独及联合对AIS患者预后不良的评估价值。结果 AIS组血浆CircOGDH、CircHECTD1相对表达水平高于对照组(t=23.616、29.181,P<0.001)。VCI组血浆CircOGDH、CircHECTD1相对表达水平高于非VCI组(t=12.657、27.667,P<0.001)。相比于预后良好组,预后不良组梗死面积、入院24 h NIHSS评分、CircOGDH、CircHECTD1相对表达水平较高,出院3个月时MMSE评分及MoCA评分较低(均P<0.05)。AIS患者血浆CircOGDH、CircHECTD1与梗死面积、入院24 h NIHSS评分呈正相关,与出院3个月MMSE评分、MoCA评分呈负相关(均P<0.05)。CircOGDH、CircHECTD1相对表达水平升高及梗死面积较大、入院24 h NIHSS评分较高是影响AIS患者预后不良的独立危险因素(均P<0.05)。血浆CircOGDH、CircHECTD1联合预测AIS预后不良的曲线下面积为0.903(95%CI:0.852~0.955),明显大于单一指标的0.831(95%CI:0.781~0.866)和0.836(95%CI:0.794~0.870)(Z=2.258、2.119,P=0.021、0.031)。结论 AIS患者血浆CircOGDH、CircHECTD1表达上调,二者与患者VCI及神经功能障碍程度有关,两项联合对AIS患者预后不良具有较高的预测价值。展开更多
Isocitrate dehydrogenase(IDH)mutations frequently occur in lower-grade gliomas and secondary glioblastomas.Mutant IDHs exhibit a gain-of-function activity,leading to the production of D-2-hydroxyglutarate(D-2HG)by red...Isocitrate dehydrogenase(IDH)mutations frequently occur in lower-grade gliomas and secondary glioblastomas.Mutant IDHs exhibit a gain-of-function activity,leading to the production of D-2-hydroxyglutarate(D-2HG)by reducingα-ketoglutarate(α-KG),a central player in metabolism and epigenetic modifications.However,the role ofα-KG homeostasis in IDH-mutated gliomagenesis remains elusive.In this study,we found that low expression of oxoglutarate dehydrogenase(OGDH)was a common feature in IDH-mutated gliomas,aswellasinastrocytes.ThislowexpressionofOGDHresultedintheaccumulationofα-KGandpromotedastrocytematuration.However,IDH1 mutation significantly reducedα-KG levels and increased glutaminolysis and DNA/histone methylation in astrocytes.These metabolic and epigenetic alterations inhibited astrocyte maturation and led to cortical dysplasia in mice.Moreover,our results also indicated that reduced OGDH expression can promote the differentiation of glioma cells,while IDH1 mutations impeded the differentiation of glioma cells with low OGDH by reducing the accumulation ofα-KG and increasing glutaminolysis.Finally,we found that l-glutamine increasedα-KG levels and augmented the differentiation-promoting effects of AGI5198,an IDH1-mutant inhibitor,in IDH1-mutant glioma cells.Collectively,this study reveals that low OGDH expression is a crucial metabolic characteristic of IDH-mutant gliomas,providing a potential strategy for the treatment of IDH-mutant gliomas by targetingα-KG homeostasis.展开更多
文摘目的 探讨急性缺血性脑卒中(AIS)患者血浆环状RNA(Circ)OGDH、CircHECTD1表达及临床意义。方法 选取2020年12月至2022年12月该院收治的112例AIS患者为AIS组,以同期参加体检的60例健康者为对照组。根据随访出院3个月时AIS患者是否存在血管性认知功能障碍(VCI)分为VCI组(60例)和非VCI组(52例);根据随访出院3个月时AIS患者的预后情况分为预后良好组(87例)和预后不良组(25例)。采用实时荧光定量PCR检测各组血浆CircOGDH、CircHECTD1表达。采用简易智能精神量表(MMSE)、蒙特利尔认知评估量表(MoCA)及美国国立卫生研究院卒中量表(NIHSS)评分评估AIS患者VCI及神经功能障碍程度。采用Pearson相关分析血浆CircOGDH、CircHECTD1与临床参数的相关性。采用多因素Logistic回归分析影响AIS患者预后不良的因素。采用受试者工作特征(ROC)曲线分析CircOGDH、CircHECTD1单独及联合对AIS患者预后不良的评估价值。结果 AIS组血浆CircOGDH、CircHECTD1相对表达水平高于对照组(t=23.616、29.181,P<0.001)。VCI组血浆CircOGDH、CircHECTD1相对表达水平高于非VCI组(t=12.657、27.667,P<0.001)。相比于预后良好组,预后不良组梗死面积、入院24 h NIHSS评分、CircOGDH、CircHECTD1相对表达水平较高,出院3个月时MMSE评分及MoCA评分较低(均P<0.05)。AIS患者血浆CircOGDH、CircHECTD1与梗死面积、入院24 h NIHSS评分呈正相关,与出院3个月MMSE评分、MoCA评分呈负相关(均P<0.05)。CircOGDH、CircHECTD1相对表达水平升高及梗死面积较大、入院24 h NIHSS评分较高是影响AIS患者预后不良的独立危险因素(均P<0.05)。血浆CircOGDH、CircHECTD1联合预测AIS预后不良的曲线下面积为0.903(95%CI:0.852~0.955),明显大于单一指标的0.831(95%CI:0.781~0.866)和0.836(95%CI:0.794~0.870)(Z=2.258、2.119,P=0.021、0.031)。结论 AIS患者血浆CircOGDH、CircHECTD1表达上调,二者与患者VCI及神经功能障碍程度有关,两项联合对AIS患者预后不良具有较高的预测价值。
基金supported by funds from the National Key Research and Development Program of China(2022YFA0806501)the National Natural Science Foundation of China(81972342 to J.Y.,82173120 to Y.G.,and 82070298 to L.Z.)the Natural Science Basic Research Plan in ShaanxiProvince(2020JZ-29 to J.Y.).
文摘Isocitrate dehydrogenase(IDH)mutations frequently occur in lower-grade gliomas and secondary glioblastomas.Mutant IDHs exhibit a gain-of-function activity,leading to the production of D-2-hydroxyglutarate(D-2HG)by reducingα-ketoglutarate(α-KG),a central player in metabolism and epigenetic modifications.However,the role ofα-KG homeostasis in IDH-mutated gliomagenesis remains elusive.In this study,we found that low expression of oxoglutarate dehydrogenase(OGDH)was a common feature in IDH-mutated gliomas,aswellasinastrocytes.ThislowexpressionofOGDHresultedintheaccumulationofα-KGandpromotedastrocytematuration.However,IDH1 mutation significantly reducedα-KG levels and increased glutaminolysis and DNA/histone methylation in astrocytes.These metabolic and epigenetic alterations inhibited astrocyte maturation and led to cortical dysplasia in mice.Moreover,our results also indicated that reduced OGDH expression can promote the differentiation of glioma cells,while IDH1 mutations impeded the differentiation of glioma cells with low OGDH by reducing the accumulation ofα-KG and increasing glutaminolysis.Finally,we found that l-glutamine increasedα-KG levels and augmented the differentiation-promoting effects of AGI5198,an IDH1-mutant inhibitor,in IDH1-mutant glioma cells.Collectively,this study reveals that low OGDH expression is a crucial metabolic characteristic of IDH-mutant gliomas,providing a potential strategy for the treatment of IDH-mutant gliomas by targetingα-KG homeostasis.