Objective To produce anti‐19‐Nortestosterone （NT） monoclonal antibodies and identify their immunological characteristics. Methods Hybridomas were prepared by fusing NS0 mouse myeloma cells with splenocytes isolate...Objective To produce anti‐19‐Nortestosterone （NT） monoclonal antibodies and identify their immunological characteristics. Methods Hybridomas were prepared by fusing NS0 mouse myeloma cells with splenocytes isolated from immunized BALB/c mice. Noncompetitive and competitive indirect ELISA were employed to screen positive cell clones. A caprylic acid ammonium sulphate （CAAP） method was used to purify NT mAb, and the Batty saturation method was used to determine the affinity constant （Kaff）. Results Five hybridoma cell lines, named NT‐1, NT‐2, NT‐3, NT‐4, and NT‐5, were identified and their corresponding mAbs were of the IgG 1 isotype with a k light chain. The Kaffs of all mAbs were between 2.6 and 4.7×10 9 L/mol. The titers and IC 50 values of purified ascite fluids were in the range of （0.64–2.56）×10 5 and （0.55–1.0） ng/mL, respectively. Of all the cross‐reacting steroids, α ‐NT was the most reactive with the mAbs at 62% with NT‐1 mAb and 64% with NT‐2 mAb. Negligible cross‐reactivity （0.01%） with other steroids was observed. Conclusion The establishment of these hybridomas allows the potential development of a rapid test kit, and may provide an alternative method for the detection of NT residues in food producing animals.展开更多
Stem cell-based therapies have been proposed as a potential treatment for neural regeneration following closed head injury.We previously reported that induced neural stem cells exert beneficial effects on neural regen...Stem cell-based therapies have been proposed as a potential treatment for neural regeneration following closed head injury.We previously reported that induced neural stem cells exert beneficial effects on neural regeneration via cell replacement.However,the neural regeneration efficiency of induced neural stem cells remains limited.In this study,we explored differentially expressed genes and long non-coding RNAs to clarify the mechanism underlying the neurogenesis of induced neural stem cells.We found that H19 was the most downregulated neurogenesis-associated lnc RNA in induced neural stem cells compared with induced pluripotent stem cells.Additionally,we demonstrated that H19 levels in induced neural stem cells were markedly lower than those in induced pluripotent stem cells and were substantially higher than those in induced neural stem cell-derived neurons.We predicted the target genes of H19 and discovered that H19 directly interacts with mi R-325-3p,which directly interacts with Ctbp2 in induced pluripotent stem cells and induced neural stem cells.Silencing H19 or Ctbp2 impaired induced neural stem cell proliferation,and mi R-325-3p suppression restored the effect of H19 inhibition but not the effect of Ctbp2 inhibition.Furthermore,H19 silencing substantially promoted the neural differentiation of induced neural stem cells and did not induce apoptosis of induced neural stem cells.Notably,silencing H19 in induced neural stem cell grafts markedly accelerated the neurological recovery of closed head injury mice.Our results reveal that H19 regulates the neurogenesis of induced neural stem cells.H19 inhibition may promote the neural differentiation of induced neural stem cells,which is closely associated with neurological recovery following closed head injury.展开更多
目的探究盆底功能障碍性疾病(pelvic floor dysfunctional disease,PFD)患者血清微小RNA(microRNA,miR)-4429和微小RNA(microRNA,miR)-19-3p水平表达及意义。方法选取2021年6月~2022年6月衡水市第二人民医院收治的PFD患者90例作为PFD组...目的探究盆底功能障碍性疾病(pelvic floor dysfunctional disease,PFD)患者血清微小RNA(microRNA,miR)-4429和微小RNA(microRNA,miR)-19-3p水平表达及意义。方法选取2021年6月~2022年6月衡水市第二人民医院收治的PFD患者90例作为PFD组,分为盆腔器官脱垂(pelvic organ prolapse,POP)组(n=50)、压力性尿失禁(stress urinary incontinence,SUI)组(n=25)和POP并发SUI组(n=15);并选取同期在衡水市第二人民医院检查的健康女性80例为对照组。比较对照组与PFD组分娩方式、既往流产史、PFD家族史等一般资料。比较各组血清miR-4429和miR-19-3p水平。受试者工作特征(receiver operating characteristic,ROC)曲线分析血清miR-4429,miR-19-3p水平对PFD的诊断价值。Logistic回归分析影响PFD的因素。配对样本t检验比较PFD治疗前后血清miR-4429,miR-19-3p水平变化。结果PFD组在分娩方式、既往流产史、PFD家族史方面与对照组相比差异均有统计学意义(t=4.415,6.444,4.707,均P<0.05)。PFD组血清miR-4429水平较对照组降低(0.71±0.19 vs 1.00±0.25),miR-19-3p水平较对照组升高(1.44±0.35 vs 1.01±0.28),差异具有统计学意义(t=8.927,8.772,均P<0.05)。POP组和SUI组血清miR-4429水平高于POP并发SUI组(0.73±0.22,0.74±0.16 vs 0.59±0.16),POP组和SUI组血清miR-19-3p水平低于POP并发SUI组(1.35±0.39,1.41±0.31 vs 1.77±0.56),差异具有统计学意义(t=3.531,3.411;5.003,3.865,均P<0.05)。ROC曲线分析显示,miR-4429,miR-19-3p可辅助评估是否发生PFD的曲线下面积(area under curve,AUC)分别为0.805,0.825,二者联合检测的AUC为0.865。多因素分析显示,miR-19-3p是影响PFD的危险因素,miR-4429是保护因素。经过治疗发现,PFD患者血清miR-4429水平升高(0.93±0.23 vs 0.71±0.19),miR-19-3p水平降低(1.12±0.29 vs 1.44±0.35),差异具有统计学意义(t=6.996,6.679,均P<0.05)。结论PFD患者血清miR-4429水平降低,miR-19-3p水平升高,血清miR-4429,miR-19-3p水平与PFD疾病的发生发展密切相关,可作为预测PFD的评估指标。展开更多
基金supported by the Henan Innovation Project for University Prominent Research Talents, 2010HASTIT026
文摘Objective To produce anti‐19‐Nortestosterone （NT） monoclonal antibodies and identify their immunological characteristics. Methods Hybridomas were prepared by fusing NS0 mouse myeloma cells with splenocytes isolated from immunized BALB/c mice. Noncompetitive and competitive indirect ELISA were employed to screen positive cell clones. A caprylic acid ammonium sulphate （CAAP） method was used to purify NT mAb, and the Batty saturation method was used to determine the affinity constant （Kaff）. Results Five hybridoma cell lines, named NT‐1, NT‐2, NT‐3, NT‐4, and NT‐5, were identified and their corresponding mAbs were of the IgG 1 isotype with a k light chain. The Kaffs of all mAbs were between 2.6 and 4.7×10 9 L/mol. The titers and IC 50 values of purified ascite fluids were in the range of （0.64–2.56）×10 5 and （0.55–1.0） ng/mL, respectively. Of all the cross‐reacting steroids, α ‐NT was the most reactive with the mAbs at 62% with NT‐1 mAb and 64% with NT‐2 mAb. Negligible cross‐reactivity （0.01%） with other steroids was observed. Conclusion The establishment of these hybridomas allows the potential development of a rapid test kit, and may provide an alternative method for the detection of NT residues in food producing animals.
基金supported by the National Natural Science Foundation of China,Nos.82271397(to MG),82001293(to MG),82171355(to RX),81971295(to RX)and 81671189(to RX)。
文摘Stem cell-based therapies have been proposed as a potential treatment for neural regeneration following closed head injury.We previously reported that induced neural stem cells exert beneficial effects on neural regeneration via cell replacement.However,the neural regeneration efficiency of induced neural stem cells remains limited.In this study,we explored differentially expressed genes and long non-coding RNAs to clarify the mechanism underlying the neurogenesis of induced neural stem cells.We found that H19 was the most downregulated neurogenesis-associated lnc RNA in induced neural stem cells compared with induced pluripotent stem cells.Additionally,we demonstrated that H19 levels in induced neural stem cells were markedly lower than those in induced pluripotent stem cells and were substantially higher than those in induced neural stem cell-derived neurons.We predicted the target genes of H19 and discovered that H19 directly interacts with mi R-325-3p,which directly interacts with Ctbp2 in induced pluripotent stem cells and induced neural stem cells.Silencing H19 or Ctbp2 impaired induced neural stem cell proliferation,and mi R-325-3p suppression restored the effect of H19 inhibition but not the effect of Ctbp2 inhibition.Furthermore,H19 silencing substantially promoted the neural differentiation of induced neural stem cells and did not induce apoptosis of induced neural stem cells.Notably,silencing H19 in induced neural stem cell grafts markedly accelerated the neurological recovery of closed head injury mice.Our results reveal that H19 regulates the neurogenesis of induced neural stem cells.H19 inhibition may promote the neural differentiation of induced neural stem cells,which is closely associated with neurological recovery following closed head injury.
文摘目的探究盆底功能障碍性疾病(pelvic floor dysfunctional disease,PFD)患者血清微小RNA(microRNA,miR)-4429和微小RNA(microRNA,miR)-19-3p水平表达及意义。方法选取2021年6月~2022年6月衡水市第二人民医院收治的PFD患者90例作为PFD组,分为盆腔器官脱垂(pelvic organ prolapse,POP)组(n=50)、压力性尿失禁(stress urinary incontinence,SUI)组(n=25)和POP并发SUI组(n=15);并选取同期在衡水市第二人民医院检查的健康女性80例为对照组。比较对照组与PFD组分娩方式、既往流产史、PFD家族史等一般资料。比较各组血清miR-4429和miR-19-3p水平。受试者工作特征(receiver operating characteristic,ROC)曲线分析血清miR-4429,miR-19-3p水平对PFD的诊断价值。Logistic回归分析影响PFD的因素。配对样本t检验比较PFD治疗前后血清miR-4429,miR-19-3p水平变化。结果PFD组在分娩方式、既往流产史、PFD家族史方面与对照组相比差异均有统计学意义(t=4.415,6.444,4.707,均P<0.05)。PFD组血清miR-4429水平较对照组降低(0.71±0.19 vs 1.00±0.25),miR-19-3p水平较对照组升高(1.44±0.35 vs 1.01±0.28),差异具有统计学意义(t=8.927,8.772,均P<0.05)。POP组和SUI组血清miR-4429水平高于POP并发SUI组(0.73±0.22,0.74±0.16 vs 0.59±0.16),POP组和SUI组血清miR-19-3p水平低于POP并发SUI组(1.35±0.39,1.41±0.31 vs 1.77±0.56),差异具有统计学意义(t=3.531,3.411;5.003,3.865,均P<0.05)。ROC曲线分析显示,miR-4429,miR-19-3p可辅助评估是否发生PFD的曲线下面积(area under curve,AUC)分别为0.805,0.825,二者联合检测的AUC为0.865。多因素分析显示,miR-19-3p是影响PFD的危险因素,miR-4429是保护因素。经过治疗发现,PFD患者血清miR-4429水平升高(0.93±0.23 vs 0.71±0.19),miR-19-3p水平降低(1.12±0.29 vs 1.44±0.35),差异具有统计学意义(t=6.996,6.679,均P<0.05)。结论PFD患者血清miR-4429水平降低,miR-19-3p水平升高,血清miR-4429,miR-19-3p水平与PFD疾病的发生发展密切相关,可作为预测PFD的评估指标。
