Hypochromic microcytic anaemia includes iron deficiency, anaemia of chronic disorders, beta thalassemia trait and sideroblastic anaemia. To rule out the cause of hypochromic microcytic anaemia is a diagnostic difficul...Hypochromic microcytic anaemia includes iron deficiency, anaemia of chronic disorders, beta thalassemia trait and sideroblastic anaemia. To rule out the cause of hypochromic microcytic anaemia is a diagnostic difficulty. The conventional laboratory tests used for diagnosis have few disadvantages. Serum transferrin receptor (sTfR) is the most reliable method for assessment of body iron. Eighty four children were included in this study. They were further divided into four groups: iron deficiency anaemia (IDA), anaemia of chronic disorders (ACD), beta thalassemia trait (β TT) and controls. Children withIDAand ACD were diagnosed on the basis of history and serum iron profile. Subjects with β TT had HbA2 > 3.5%. sTfR were performed on all subjects. Level of sTfR in patients withIDAwas 5.79 μg/ml ± 1.3 μg/ml. In patients with anaemia of chronic disorders (ACD), β thalassemia trait and controls mean sTfR were 2.18 μg/ml ± 0.6 μg/ml, 2.1μg/ml ± 0.5 μg/ml and 2.0 μg/ml ± 0.5 μg/ml respectively. These results show level of sTfR was raised in IDA when compared with controls or ACD and β TT (p展开更多
Transferrin（TF） and its isoforms have been widely reported via various analytical techniques, including a noticeable increased number of isoforms with low content of sialic acid（asialo-, monosialo-, and disialo-tra...Transferrin（TF） and its isoforms have been widely reported via various analytical techniques, including a noticeable increased number of isoforms with low content of sialic acid（asialo-, monosialo-, and disialo-transferrin） and asialo-TF as well as disialo-TF, with one or several oligosaccharides released in human serum transferrin（hTf）. Here, hTf has been purified by native gradient polyacrylamide gel electrophoresis（PAGEso） before use. The hTf extracted with the electron-transfer approach showed a single subunit band（77.1 Da） in the SDS-PAGE gel, but it exhibited two bands in the native and denatured isoelectric focusing（IEF） gels, namely, hTf-2Fe^3＋ and apo-hTf, without finding any other transferrin isoforms. A reversed phase HPLC（RP-HPLC） equipped with a C18 column effectively separated hTf and its polymers and combined off-line techniques, including peptide mass fingerprinting（PMF）, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry（MALDI-TOF-MS） and database search, and identified the high homology among hTf, apo-hTf, and their isoforms. Moreover, the elution solution consisting of acetonitrile and formic acid could easily denature both hTf and apo-hTf to form various isoforms during separation with HPLC, indicating that chemical factors lead to the formation of various isoforms in transferrin, artificially, during extraction and separation. The authors claimed that only two transferrin isoforms existed in the NHS, namely, hTf-2Fe^3＋ and apo-hTf, which could be employed in biomarkers, to distinguish the healthy population from many disease sufferers, such as, carbohydrate-deficient transferrin（CDT）展开更多
Objective To establish and evaluate a protein serum ferritin （SF） and soluble transferrin receptor microarray method for combined measurement of （sTfR）. Methods Microarrayer was used to print both anti-SF antibodi...Objective To establish and evaluate a protein serum ferritin （SF） and soluble transferrin receptor microarray method for combined measurement of （sTfR）. Methods Microarrayer was used to print both anti-SF antibodies I and anti-sTfR antibodies I on each protein microarray. Anti-SF antibodies II and anti-sTfR antibodies II were used as detection antibodies and goat antibodies coupled to Cy3 were used as antibodies Ill. The detection conditions of the quantitative analysis method for simultaneous measurement of SF and sTfR with protein microarray were optimized and evaluated. The protein microarray was compared with commercially available traditional tests with 26 serum samples. Results By comparison experiment, mouse monoclonal antibodies were chosen as the probes and contact printing was chosen as the printing method. The concentrations of SF and sTfR probes were 0.5 mg/mL and 0.5 mg/mL respectively, while those of SF and sTfR detection antibodies were 5 μg/mL and 0.36 μg/mL respectively. Intra- and inter-assay variability was between 3.26% and 18.38% for all tests. The regression coefficients comparing protein microarray with traditional test assays were better than 0.81 for SF and sTfR. Conclusion The present study has established a protein microarray method for combined measurement of SF and sTfR.展开更多
目的探讨非贫血人群血清铁蛋白(serum ferritin,SF)和转铁蛋白饱和度(transferrin saturation,TSAT)与全因死亡和心血管死亡的相关性。方法选取1999—2000年和2001—2002年国家健康和营养检查调查研究(national health and nutrition ex...目的探讨非贫血人群血清铁蛋白(serum ferritin,SF)和转铁蛋白饱和度(transferrin saturation,TSAT)与全因死亡和心血管死亡的相关性。方法选取1999—2000年和2001—2002年国家健康和营养检查调查研究(national health and nutrition examination survey,NHANES)的非贫血人群7167例,于2006年12月31日前对死亡终点进行随访,采用阈值效应分析和多因素cox回归模型分析SF和TAST与全因死亡和心血管死亡风险的相关性。结果7167例患者中男3533例、女3634例,年龄18~85岁,平均(46.1±20.0)岁,BMI平均(27.9±6.2)kg/m2。平均随访(5.1±1.2)年,共随访11623人/年,其中全因死亡452例、心血管死亡117例。SF与全因死亡和心血管死亡呈非线性相关,SF的截断值为200 ng/ml;当SF<200 ng/ml时,SF每增加100 ng/ml,全因死亡风险增加25%(HR=1.252,95%CI:1.068~1.486,P=0.008),心血管死亡风险增加37%(HR=1.370,95%CI:1.076~1.900,P=0.036)。TSAT与全因死亡率呈L型非线性相关,截断值为30%,当TSAT<30%时,TSAT每增加10%,全因死亡风险降低21%(HR=0.791,95%CI:0.681~0.914,P=0.001);TSAT与心血管死亡风险呈线性负相关(HR=0.803,95%CI:0.660~0.963,P=0.014)。结论非贫血人群的SF与全因死亡和心血管死亡呈非线性相关、截断值为200 ng/ml,TSAT与全因死亡呈L型相关、截断值为30%,且TSAT与心血管死亡呈负相关。建议将非贫血人群的SF与TSAT控制在合适范围,以降低死亡风险,并改善预后。展开更多
文摘Hypochromic microcytic anaemia includes iron deficiency, anaemia of chronic disorders, beta thalassemia trait and sideroblastic anaemia. To rule out the cause of hypochromic microcytic anaemia is a diagnostic difficulty. The conventional laboratory tests used for diagnosis have few disadvantages. Serum transferrin receptor (sTfR) is the most reliable method for assessment of body iron. Eighty four children were included in this study. They were further divided into four groups: iron deficiency anaemia (IDA), anaemia of chronic disorders (ACD), beta thalassemia trait (β TT) and controls. Children withIDAand ACD were diagnosed on the basis of history and serum iron profile. Subjects with β TT had HbA2 > 3.5%. sTfR were performed on all subjects. Level of sTfR in patients withIDAwas 5.79 μg/ml ± 1.3 μg/ml. In patients with anaemia of chronic disorders (ACD), β thalassemia trait and controls mean sTfR were 2.18 μg/ml ± 0.6 μg/ml, 2.1μg/ml ± 0.5 μg/ml and 2.0 μg/ml ± 0.5 μg/ml respectively. These results show level of sTfR was raised in IDA when compared with controls or ACD and β TT (p
基金National Natural Science Foundation of China(No.30470372Foundation of Xiamen Natural Science of China(No.3502Z2001262)Program for Innovative Research Team in Science and Technology in Fujian Province University
文摘Transferrin（TF） and its isoforms have been widely reported via various analytical techniques, including a noticeable increased number of isoforms with low content of sialic acid（asialo-, monosialo-, and disialo-transferrin） and asialo-TF as well as disialo-TF, with one or several oligosaccharides released in human serum transferrin（hTf）. Here, hTf has been purified by native gradient polyacrylamide gel electrophoresis（PAGEso） before use. The hTf extracted with the electron-transfer approach showed a single subunit band（77.1 Da） in the SDS-PAGE gel, but it exhibited two bands in the native and denatured isoelectric focusing（IEF） gels, namely, hTf-2Fe^3＋ and apo-hTf, without finding any other transferrin isoforms. A reversed phase HPLC（RP-HPLC） equipped with a C18 column effectively separated hTf and its polymers and combined off-line techniques, including peptide mass fingerprinting（PMF）, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry（MALDI-TOF-MS） and database search, and identified the high homology among hTf, apo-hTf, and their isoforms. Moreover, the elution solution consisting of acetonitrile and formic acid could easily denature both hTf and apo-hTf to form various isoforms during separation with HPLC, indicating that chemical factors lead to the formation of various isoforms in transferrin, artificially, during extraction and separation. The authors claimed that only two transferrin isoforms existed in the NHS, namely, hTf-2Fe^3＋ and apo-hTf, which could be employed in biomarkers, to distinguish the healthy population from many disease sufferers, such as, carbohydrate-deficient transferrin（CDT）
基金funded by the 863 Program entitled as"The research and exploration of nutrition fortified food for improving growth and development(2010AA023004)"performed by the Trace Elements Nutrition Key Laboratory of the Ministry of Health
文摘Objective To establish and evaluate a protein serum ferritin （SF） and soluble transferrin receptor microarray method for combined measurement of （sTfR）. Methods Microarrayer was used to print both anti-SF antibodies I and anti-sTfR antibodies I on each protein microarray. Anti-SF antibodies II and anti-sTfR antibodies II were used as detection antibodies and goat antibodies coupled to Cy3 were used as antibodies Ill. The detection conditions of the quantitative analysis method for simultaneous measurement of SF and sTfR with protein microarray were optimized and evaluated. The protein microarray was compared with commercially available traditional tests with 26 serum samples. Results By comparison experiment, mouse monoclonal antibodies were chosen as the probes and contact printing was chosen as the printing method. The concentrations of SF and sTfR probes were 0.5 mg/mL and 0.5 mg/mL respectively, while those of SF and sTfR detection antibodies were 5 μg/mL and 0.36 μg/mL respectively. Intra- and inter-assay variability was between 3.26% and 18.38% for all tests. The regression coefficients comparing protein microarray with traditional test assays were better than 0.81 for SF and sTfR. Conclusion The present study has established a protein microarray method for combined measurement of SF and sTfR.
文摘目的探究妊娠期贫血孕妇血清铁(serum iron,SI)及可溶性血清转铁蛋白受体(soluble serum transferrin receptor,sTfR)检测与妊娠结局的关系及临床意义。方法选取2020年1月至2021年6月同济大学附属第一妇婴保健院收治的1000例孕妇作为研究对象,根据有无贫血分为贫血组(n=195)和无贫血组(n=805),比较两组孕妇的一般资料、SI、sTfR水平。随访至妊娠结束,比较两组孕妇不良妊娠结局发生情况。比较不同妊娠结局贫血孕妇的SI、sTfR水平,采用受试者操作特征(receiver operating characteristic,ROC)曲线和曲线下面积(area under the curve,AUC)评估SI、sTfR水平对贫血孕妇妊娠结局的预测价值。统计学方法采用独立样本t检验和χ^(2)检验。结果妊娠期贫血的发生率为19.50%(195/1000)。贫血组孕妇SI水平低于无贫血组[(5.5±1.0)与(18.2±6.0)μmol/L,t=29.370,P<0.001];sTfR水平高于无贫血组[(3.8±1.3)与(1.9±0.6)mg/L,t=31.638,P<0.001]。贫血组孕妇不良妊娠结局总发生率高于无贫血组[23.59%(46/195)与4.10%(33/805),χ^(2)=81.957,P<0.05]。发生与未发生不良妊娠结局贫血孕妇的SI水平分别为[(4.6±0.8)与(5.7±0.8)μmol/L,t=15.366,P<0.001],发生较未发生不良妊娠结局贫血孕妇低;sTfR水平分别为[(4.6±1.2)与(3.6±1.0)mg/L,t=8.985,P<0.001],发生较未发生不良妊娠结局贫血孕妇高。SI、sTfR单独预测的AUC分别为0.743、0.770,联合预测的AUC最大,为0.924,最佳诊断敏感度、特异性分别为80.43%、87.92%。结论SI、sTfR水平变化与妊娠期贫血的发生密切相关,联合检测对于妊娠期贫血孕妇的妊娠结局具有较高预测价值,可作为临床早期评估预测的辅助指标。
