目的建立基于同位素稀释液相色谱串联质谱技术(liquid phase chromatography tandem mass spectrometry,LC-MS/MS)的血清25羟维生素D3[25-hydroxy vitamin D3,25(OH)D3]的候选参考测量程序。方法采用同位素标准溶液为内标,液液萃取进行...目的建立基于同位素稀释液相色谱串联质谱技术(liquid phase chromatography tandem mass spectrometry,LC-MS/MS)的血清25羟维生素D3[25-hydroxy vitamin D3,25(OH)D3]的候选参考测量程序。方法采用同位素标准溶液为内标,液液萃取进行前处理,正离子电喷雾模式进行监测。参照美国临床实验室标准化协会(Clinical and Laboratory Standards Institute,CLSI)C62-A和EP15-A3等文件,对方法的正确度、精密度、线性范围、定量限、检测下限、相对基质效应等进行验证。采用候选参考测量程序和质谱常规程序检测40份临床血清样本,评价两种方法的一致性。结果候选方法的分析时间为15 min,通过色谱的等度洗脱可有效分离同分异构体3-epi-25(OH)D3,特异度好。测定参考实验室室间比对(RELA)样本,偏倚低于1.5%。批内精密度和批间精密度分别为0.75%~2.31%和1.28%~2.01%。定量限和检测下限分别为0.85 ng/ml和1.84 ng/ml。在2.5~220ng/ml浓度范围内线性良好。无相对基质效应和携带污染。质谱常规程序与候选参考程序的相关性较好(r=0.982),但低浓度样本处的偏差超出卫健委临检中心室间质评的允许总误差±25%。结论成功建立了基于LC-MS/MS技术的血清25(OH)D3的候选参考测量程序,分析性能符合要求,可用于临床常规方法的量值溯源。展开更多
目的:观察不同滴度谷氨酸脱羧酶抗体(GADA)成人隐匿性自身免疫性糖尿病(LADA)患者25羟维生素D3[25(OH)D3]水平及T淋巴细胞亚群的变化,探讨其与胰岛β细胞功能的关系。方法:在成人糖尿病(DM)患者中筛查获得GADA阳性患者,根据GADA滴度水...目的:观察不同滴度谷氨酸脱羧酶抗体(GADA)成人隐匿性自身免疫性糖尿病(LADA)患者25羟维生素D3[25(OH)D3]水平及T淋巴细胞亚群的变化,探讨其与胰岛β细胞功能的关系。方法:在成人糖尿病(DM)患者中筛查获得GADA阳性患者,根据GADA滴度水平分为低滴度组和高滴度组,对照组为普通2型糖尿病(T2DM)患者。检测空腹血糖(FBG)、血脂、肝肾功能,糖化血红蛋白(HbA1c)、空腹血清C肽(FCP)、25(OH)D3和T淋巴细胞亚群(CD3^(+)、CD4^(+)和CD8^(+))。计算胰岛素抵抗指数[Homa-IR(CP)]和胰岛功能指数[Homa-islet(CP)]。结果:与T2DM组比较,高滴度组体重指数(BMI)、25(OH)D3水平、FCP、餐后2 h C肽(2 hCP)、Homa-IR(CP)和Homa-islet(CP)均降低,差异有统计学意义(P<0.05),同时合并有较低的总胆固醇(TC)、三酰甘油(TG)、尿酸(UA)水平,差异有统计学意义(P<0.05);低滴度组也表现出BMI、25(OH)D3水平、FCP、2 hCP、Homa-IR(CP)和Homa-islet(CP)降低,伴低TC水平,差异有统计学意义(P<0.05)。高滴度组CD4^(+)/CD8^(+)T比值高于低滴度组,差异有统计学意义(P<0.05),LADA患者CD4^(+)/CD8^(+)比值与GADA滴度呈正相关(r=0.37,P<0.01),25(OH)D3水平与Homa-islet(CP)呈正相关(r=0.32,P=0.02)。结论:低25(OH)D3水平及T淋巴细胞亚群比例失衡与胰岛β细胞功能损伤有关并参与LADA病程的进展。展开更多
Mental disorders seriously affect people’s health and social stability.This Mendelian randomization(MR)study was designed to investigate the causal relationship between circulating vitamin C(VC)or 25-hydroxyvitamin D...Mental disorders seriously affect people’s health and social stability.This Mendelian randomization(MR)study was designed to investigate the causal relationship between circulating vitamin C(VC)or 25-hydroxyvitamin D(25(OH)D)levels and mental disorders.The data used for the MR analysis were derived from the summary genome-wide association studies(GWAS)database for VC and 25(OH)D and from the Finn Gen consortium for fourteen mental disorders.Based on the inverse variance weighted(IVW)method,we found a potential causal association between circulating VC and anxiety disorders(IVW:OR=1.139,95%CI:1.023-1.269,P=0.018).However,no causal association was found between VC or 25(OH)D and other mental disorders(P>0.05).In the reverse MR analysis,individuals with Alzheimer’s disease was causally associated with higher concentrations of circulating VC(P=0.012),while individuals with anxiety disorders had a negative association between the concentrations of 25(OH)D(P=0.012).However,the current evidence does not support a causal relationship between VC or 25(OH)D and other mental disorders.In addition,there was no causal association between circulating VC and 25(OH)D(P>0.05).Future studies are needed to confirm these findings and to elucidate the mechanisms of potential causality.展开更多
文摘目的建立基于同位素稀释液相色谱串联质谱技术(liquid phase chromatography tandem mass spectrometry,LC-MS/MS)的血清25羟维生素D3[25-hydroxy vitamin D3,25(OH)D3]的候选参考测量程序。方法采用同位素标准溶液为内标,液液萃取进行前处理,正离子电喷雾模式进行监测。参照美国临床实验室标准化协会(Clinical and Laboratory Standards Institute,CLSI)C62-A和EP15-A3等文件,对方法的正确度、精密度、线性范围、定量限、检测下限、相对基质效应等进行验证。采用候选参考测量程序和质谱常规程序检测40份临床血清样本,评价两种方法的一致性。结果候选方法的分析时间为15 min,通过色谱的等度洗脱可有效分离同分异构体3-epi-25(OH)D3,特异度好。测定参考实验室室间比对(RELA)样本,偏倚低于1.5%。批内精密度和批间精密度分别为0.75%~2.31%和1.28%~2.01%。定量限和检测下限分别为0.85 ng/ml和1.84 ng/ml。在2.5~220ng/ml浓度范围内线性良好。无相对基质效应和携带污染。质谱常规程序与候选参考程序的相关性较好(r=0.982),但低浓度样本处的偏差超出卫健委临检中心室间质评的允许总误差±25%。结论成功建立了基于LC-MS/MS技术的血清25(OH)D3的候选参考测量程序,分析性能符合要求,可用于临床常规方法的量值溯源。
文摘目的:观察不同滴度谷氨酸脱羧酶抗体(GADA)成人隐匿性自身免疫性糖尿病(LADA)患者25羟维生素D3[25(OH)D3]水平及T淋巴细胞亚群的变化,探讨其与胰岛β细胞功能的关系。方法:在成人糖尿病(DM)患者中筛查获得GADA阳性患者,根据GADA滴度水平分为低滴度组和高滴度组,对照组为普通2型糖尿病(T2DM)患者。检测空腹血糖(FBG)、血脂、肝肾功能,糖化血红蛋白(HbA1c)、空腹血清C肽(FCP)、25(OH)D3和T淋巴细胞亚群(CD3^(+)、CD4^(+)和CD8^(+))。计算胰岛素抵抗指数[Homa-IR(CP)]和胰岛功能指数[Homa-islet(CP)]。结果:与T2DM组比较,高滴度组体重指数(BMI)、25(OH)D3水平、FCP、餐后2 h C肽(2 hCP)、Homa-IR(CP)和Homa-islet(CP)均降低,差异有统计学意义(P<0.05),同时合并有较低的总胆固醇(TC)、三酰甘油(TG)、尿酸(UA)水平,差异有统计学意义(P<0.05);低滴度组也表现出BMI、25(OH)D3水平、FCP、2 hCP、Homa-IR(CP)和Homa-islet(CP)降低,伴低TC水平,差异有统计学意义(P<0.05)。高滴度组CD4^(+)/CD8^(+)T比值高于低滴度组,差异有统计学意义(P<0.05),LADA患者CD4^(+)/CD8^(+)比值与GADA滴度呈正相关(r=0.37,P<0.01),25(OH)D3水平与Homa-islet(CP)呈正相关(r=0.32,P=0.02)。结论:低25(OH)D3水平及T淋巴细胞亚群比例失衡与胰岛β细胞功能损伤有关并参与LADA病程的进展。
基金funded by the Nactional Natural Science Foundation of China(81872618)。
文摘Mental disorders seriously affect people’s health and social stability.This Mendelian randomization(MR)study was designed to investigate the causal relationship between circulating vitamin C(VC)or 25-hydroxyvitamin D(25(OH)D)levels and mental disorders.The data used for the MR analysis were derived from the summary genome-wide association studies(GWAS)database for VC and 25(OH)D and from the Finn Gen consortium for fourteen mental disorders.Based on the inverse variance weighted(IVW)method,we found a potential causal association between circulating VC and anxiety disorders(IVW:OR=1.139,95%CI:1.023-1.269,P=0.018).However,no causal association was found between VC or 25(OH)D and other mental disorders(P>0.05).In the reverse MR analysis,individuals with Alzheimer’s disease was causally associated with higher concentrations of circulating VC(P=0.012),while individuals with anxiety disorders had a negative association between the concentrations of 25(OH)D(P=0.012).However,the current evidence does not support a causal relationship between VC or 25(OH)D and other mental disorders.In addition,there was no causal association between circulating VC and 25(OH)D(P>0.05).Future studies are needed to confirm these findings and to elucidate the mechanisms of potential causality.
