Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-t...Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-tumor tissues were obtained from 62 HCC patients.The interactions of PCED1B-AS1 and microRNA-34a(miR-34a)were detected by dual luciferase activity assay and RNA pull-down assay.The RNA expression levels of PCED1B-AS1,miR-34a and CD44 were detected by RT-qPCR,and the protein expression level of CD44 was determined by Western blotting.The cell proliferation was detected by cell proliferation assay,and the cell invasion and migration by transwell invasion assay.The HCC tumor growth after PCED1B-AS1 was downregulated was determined by in vivo animal study.Results PCED1B-AS1 was highly expressed in HCC tissues,which was associated with poor survival of HCC patients.Furthermore,PCED1B-AS1 interacted with miR-34a in HCC cells,but they did not regulate the expression of each other.Additionally,PCED1B-AS1 increased the expression level of CD44,which was targeted by miR-34a.The cell proliferation and invasion assay revealed that miR-34a inhibited the proliferation and invasion of HCC in vitro,while CD44 exhibited the opposite effects.Furthermore,PCED1B-AS1 suppressed the role of miR-34a.Moreover,the knockdown of PCED1B-AS1 repressed the HCC tumor growth in nude mice in vivo.Conclusion PCED1B-AS1 may play an oncogenic role by regulating the miR-34a/CD44 axis in HCC.展开更多
Background:microRNA 34a(miR 34a)had been reported to have a diagnostic role in acute myeloid leukemia(AML).However,its value in the bone marrow(BM)of AML patients,in addition to its role in response to therapy is stil...Background:microRNA 34a(miR 34a)had been reported to have a diagnostic role in acute myeloid leukemia(AML).However,its value in the bone marrow(BM)of AML patients,in addition to its role in response to therapy is still unclear.The current study was designed to assess the diagnostic,prognostic,and predictive significance of miR 34a in the BM of AML patients.Methods:The miR.34a was assed in BM aspirate of 82 AML patients in relation to 12 normal control subjects using qRT-PCR.The data were assessed for correlation with the relevant dinical critenia,response to therapy,disease-free survival(DFS),and overall survival(OS)rates.Results:miR.34a was significantly downregulated in AML patients[0.005(3.3×10^(-6)-1.32)],compared to the control subjects[0.108(3.2× 10^(-4)-1.64),p=0.021].The.median relative quantification(RQ)of miR-34a was 0.106(range;0-32.12).The specifaity,sensitivity,and area under the curve(AUC)for the diagnosis of AML were(58.3%,69.5%,0.707,respectively,p=0.021).patients with upregulated miR-34a showed decreased platelets count<34.5 × 10^(9)/L,and achieved early complete remission(CR,p=0.031,p=0.044,respectively).Similarly,patients who were refractory to therapy showed decreased miR 34a levels in comparison to those who achieved CR[0.002(0-0.01)and 0.12(0-32.12),respectively,p=0.002].Therefore,miR 34a could significantly identify patients with CR with a specificity of 75%and sensitivity of 100%at a cut-off of 0.014(AUC=0.927,p=0.005).There was no considerable association between miR-34a expression and survival rates of the induded AML patients.Condusion:miR-34a could be a beneficial diagnostic biomarker for AML patients.In addition,it serves as a good indicator for response to therapy,which could possibly identify patients who are refractory to treatment with 100%sensitivity and 75%specificity.展开更多
目的探讨精氨酸-甘氨酸-天冬氨酸(Arg-Gly-Asp,RGD)修饰共载紫杉醇与microRNA-34a脂质体(RGD mi LPs-34a/PTX)的体内药代动力学以及体内对肺癌裸鼠移植瘤的生长抑制作用。方法采用荧光分光光度法检测RGD mi LPs-34a/PTX的体外血清稳定...目的探讨精氨酸-甘氨酸-天冬氨酸(Arg-Gly-Asp,RGD)修饰共载紫杉醇与microRNA-34a脂质体(RGD mi LPs-34a/PTX)的体内药代动力学以及体内对肺癌裸鼠移植瘤的生长抑制作用。方法采用荧光分光光度法检测RGD mi LPs-34a/PTX的体外血清稳定性和体内药代动力学。构建肺癌裸鼠移植瘤模型,近红外活体成像研究RGD mi LPs-34a/PTX在荷瘤裸鼠的体内分布。荷瘤裸鼠治疗实验检测RGD mi LPs-34a/PTX对肿瘤的生长抑制作用。结果 RGD mi LPs-34a/PTX在50%血清中具有良好的稳定性。药代动力学实验表明,在荷瘤小鼠血液中的microRNA-34a的消除速率明显快于mi LPs-34a/PTX和RGD mi LPs-34a/PTX组,差异有统计学意义(P<0.05);活体成像实验结果显示,RGD mi LPs-34a/PTX在肿瘤组织的荧光分布显著强于mi LPs-34a/PTX。肿瘤生长抑制实验结果显示,RGD mi LPs-34a/PTX对肿瘤生长的抑制作用显著强于其他脂质体组,差异有统计学意义(P<0.01)。各给药组对肿瘤生长抑制能力显著强于生理盐水组,差异有统计学意义(P<0.01)。结论体内研究证实RGD修饰的共载紫杉醇和miRNA脂质体能够延长药物体内循环时间,达到长循环效果,具有良好的体内肿瘤靶向性和体内肿瘤治疗效果。展开更多
基金supported by the Medical Science and Technology Research Foundation of Guangdong Province(No.A2020559).
文摘Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-tumor tissues were obtained from 62 HCC patients.The interactions of PCED1B-AS1 and microRNA-34a(miR-34a)were detected by dual luciferase activity assay and RNA pull-down assay.The RNA expression levels of PCED1B-AS1,miR-34a and CD44 were detected by RT-qPCR,and the protein expression level of CD44 was determined by Western blotting.The cell proliferation was detected by cell proliferation assay,and the cell invasion and migration by transwell invasion assay.The HCC tumor growth after PCED1B-AS1 was downregulated was determined by in vivo animal study.Results PCED1B-AS1 was highly expressed in HCC tissues,which was associated with poor survival of HCC patients.Furthermore,PCED1B-AS1 interacted with miR-34a in HCC cells,but they did not regulate the expression of each other.Additionally,PCED1B-AS1 increased the expression level of CD44,which was targeted by miR-34a.The cell proliferation and invasion assay revealed that miR-34a inhibited the proliferation and invasion of HCC in vitro,while CD44 exhibited the opposite effects.Furthermore,PCED1B-AS1 suppressed the role of miR-34a.Moreover,the knockdown of PCED1B-AS1 repressed the HCC tumor growth in nude mice in vivo.Conclusion PCED1B-AS1 may play an oncogenic role by regulating the miR-34a/CD44 axis in HCC.
文摘Background:microRNA 34a(miR 34a)had been reported to have a diagnostic role in acute myeloid leukemia(AML).However,its value in the bone marrow(BM)of AML patients,in addition to its role in response to therapy is still unclear.The current study was designed to assess the diagnostic,prognostic,and predictive significance of miR 34a in the BM of AML patients.Methods:The miR.34a was assed in BM aspirate of 82 AML patients in relation to 12 normal control subjects using qRT-PCR.The data were assessed for correlation with the relevant dinical critenia,response to therapy,disease-free survival(DFS),and overall survival(OS)rates.Results:miR.34a was significantly downregulated in AML patients[0.005(3.3×10^(-6)-1.32)],compared to the control subjects[0.108(3.2× 10^(-4)-1.64),p=0.021].The.median relative quantification(RQ)of miR-34a was 0.106(range;0-32.12).The specifaity,sensitivity,and area under the curve(AUC)for the diagnosis of AML were(58.3%,69.5%,0.707,respectively,p=0.021).patients with upregulated miR-34a showed decreased platelets count<34.5 × 10^(9)/L,and achieved early complete remission(CR,p=0.031,p=0.044,respectively).Similarly,patients who were refractory to therapy showed decreased miR 34a levels in comparison to those who achieved CR[0.002(0-0.01)and 0.12(0-32.12),respectively,p=0.002].Therefore,miR 34a could significantly identify patients with CR with a specificity of 75%and sensitivity of 100%at a cut-off of 0.014(AUC=0.927,p=0.005).There was no considerable association between miR-34a expression and survival rates of the induded AML patients.Condusion:miR-34a could be a beneficial diagnostic biomarker for AML patients.In addition,it serves as a good indicator for response to therapy,which could possibly identify patients who are refractory to treatment with 100%sensitivity and 75%specificity.
文摘目的探讨精氨酸-甘氨酸-天冬氨酸(Arg-Gly-Asp,RGD)修饰共载紫杉醇与microRNA-34a脂质体(RGD mi LPs-34a/PTX)的体内药代动力学以及体内对肺癌裸鼠移植瘤的生长抑制作用。方法采用荧光分光光度法检测RGD mi LPs-34a/PTX的体外血清稳定性和体内药代动力学。构建肺癌裸鼠移植瘤模型,近红外活体成像研究RGD mi LPs-34a/PTX在荷瘤裸鼠的体内分布。荷瘤裸鼠治疗实验检测RGD mi LPs-34a/PTX对肿瘤的生长抑制作用。结果 RGD mi LPs-34a/PTX在50%血清中具有良好的稳定性。药代动力学实验表明,在荷瘤小鼠血液中的microRNA-34a的消除速率明显快于mi LPs-34a/PTX和RGD mi LPs-34a/PTX组,差异有统计学意义(P<0.05);活体成像实验结果显示,RGD mi LPs-34a/PTX在肿瘤组织的荧光分布显著强于mi LPs-34a/PTX。肿瘤生长抑制实验结果显示,RGD mi LPs-34a/PTX对肿瘤生长的抑制作用显著强于其他脂质体组,差异有统计学意义(P<0.01)。各给药组对肿瘤生长抑制能力显著强于生理盐水组,差异有统计学意义(P<0.01)。结论体内研究证实RGD修饰的共载紫杉醇和miRNA脂质体能够延长药物体内循环时间,达到长循环效果,具有良好的体内肿瘤靶向性和体内肿瘤治疗效果。
