目的探究microRNA-423-5p(miR-423-5p)调节磷脂酰肌醇-3-激酶/丝苏氨酸蛋白激酶(PI3K/AKT)通路在心力衰竭进展中的作用。方法构建大鼠心力衰竭模型,同时用AngⅡ处理(100 n M,24 h)大鼠心肌细胞H9C2构建心力衰竭体外模型。H9C2细胞转染mi...目的探究microRNA-423-5p(miR-423-5p)调节磷脂酰肌醇-3-激酶/丝苏氨酸蛋白激酶(PI3K/AKT)通路在心力衰竭进展中的作用。方法构建大鼠心力衰竭模型,同时用AngⅡ处理(100 n M,24 h)大鼠心肌细胞H9C2构建心力衰竭体外模型。H9C2细胞转染miR-423-5p的抑制剂和模拟剂实现miR-423-5p的敲除和过表达;LY294002用来抑制PI3K/AKT通路的激活。RT-PCR技术检测miR-423-5p的表达; Western blot检测凋亡相关蛋白Bcl-2、Bax、casapse-3/9及PI3K、AKT总蛋白及磷酸化蛋白的表达;流式细胞术检测细胞凋亡。结果 miR-423-5p的表达水平在模型组大鼠心肌组织和AngⅡ处理的H9C2细胞中升高;敲除miR-423-5p可抑制由AngⅡ造成的H9C2细胞凋亡,并促进了p-PI3K及p-AKT的表达,但敲除miR-423-5p的以上作用在PI3K/AKT通路被抑制后全部削弱。结论敲除miR-423-5p可通过激活PI3K/AKT通路抑制心肌细胞凋亡,进而缓解心力衰竭的恶性进展。展开更多
BACKGROUND： It has been found that microRNA-423-5p （miR423-Sp） is an oncogenic factor and frequently upregulated in gastric carcinoma. However, the involvement of miR423- 5p in hepatocellular carcinoma （HCC） has ...BACKGROUND： It has been found that microRNA-423-5p （miR423-Sp） is an oncogenic factor and frequently upregulated in gastric carcinoma. However, the involvement of miR423- 5p in hepatocellular carcinoma （HCC） has been rarely reported. The aim of this study was to assess whether miR423-Sp is aberrantly expressed in HCC tissues, and to characterize its roles in the cancerous biology of HCC.展开更多
BACKGROUND Shifting from the inflammatory to the proliferative phase represents a pivotal step during managing diabetic foot ulcers(DFUs);however,existing medical interventions remain insufficient.MicroRNAs(miRs)highl...BACKGROUND Shifting from the inflammatory to the proliferative phase represents a pivotal step during managing diabetic foot ulcers(DFUs);however,existing medical interventions remain insufficient.MicroRNAs(miRs)highlight notable capacity for accelerating the repair process of DFUs.Previous research has demonstrated which miR-122-5p regulates matrix metalloproteinases under diabetic conditions,thereby influencing extracellular matrix dynamics.AIM To investigate the impact of miR-122-5p on the transition from the inflammatory to the proliferative stage in DFU.METHODS Analysis for miR-122-5p expression in skin tissues from diabetic ulcer patients and mice was analyzed using quantitative real-time polymerase chain reaction(qRT-PCR).A diabetic wound healing model induced by streptozotocin was used,with mice receiving intradermal injections of adeno-associated virus-DJ encoding empty vector or miR-122.Skin tissues were retrieved at 3,7,and 14 days after injury for gene expression analysis,histology,immunohistochemistry,and network studies.The study explored miR-122-5p’s role in macrophage-fibroblast interactions and its effect on transitioning from inflammation to proliferation in DFU healing.RESULTS High-throughput sequencing revealed miR-122-5p as crucial for DFU healing.qRT-PCR showed significant upregulation of miR-122-5p within diabetic skin among DFU individuals and mice.Western blot,along with immunohistochemical and enzyme-linked immunosorbent assay,demonstrating the upregulation of inflammatory mediators(hypoxia inducible factor-1α,matrix metalloproteinase 9,tumor necrosis factor-α)and reduced fibrosis markers(fibronectin 1,α-smooth muscle actin)by targeting vascular endothelial growth factor.Fluorescence in situ hybridization indicated its expression localized to epidermal keratinocytes and fibroblasts in diabetic mice.Immunofluorescence revealed enhanced increased presence of M1 macrophages and reduced M2 polarization,highlighting its role in inflammation.MiR-122-5p elevated inflammatory cytokine levels while suppressing fibrotic activity from fibroblasts exposed to macrophage-derived media,highlighting its pivotal role in regulating DFU healing.CONCLUSION MiR-122-5p impedes cutaneous healing of diabetic mice via enhancing inflammation and inhibiting fibrosis,offering insights into miR roles in human skin wound repair.展开更多
Elemene is widely recognized as an effective anti-cancer compound and is routinely administered in Chinese clinical settings for the management of several solid tumors,including non-small cell lung cancer(NSCLC).Howev...Elemene is widely recognized as an effective anti-cancer compound and is routinely administered in Chinese clinical settings for the management of several solid tumors,including non-small cell lung cancer(NSCLC).However,its detailed molecular mechanism has not been adequately demonstrated.In this research,it was demonstrated that elemene effectively curtailed NSCLC growth in the patient-derived xenograft(PDX)model.Mechanistically,employing high-throughput screening techniques and subsequent biochemical validations such as microscale thermophoresis(MST),microRNA-145-5p(miR-145-5p)was pinpointed as a critical target through which elemene exerts its anti-tumor effects.Interestingly,elemene serves as a binding stabilizer for miR-145-5p,demonstrating a strong binding affinity(dissociation constant(KD)=0.39±0.17μg/mL)and preventing its degradation both in vitro and in vivo,while not interfering with the synthesis of the primary microRNA transcripts(pri-miRNAs)and precursor miRNAs(pre-miRNAs).The stabilization of miR-145-5p by elemene resulted in an increased level of this miRNA,subsequently suppressing NSCLC progression through the miR-145-5p/mitogen-activated protein kinase kinase kinase 3(MAP3K3)/nuclear factor kappaB(NF-κB)pathway.Our findings provide a new perspective on revealing the interaction patterns between clinical anti-tumor drugs and miRNAs.展开更多
文摘目的探究microRNA-423-5p(miR-423-5p)调节磷脂酰肌醇-3-激酶/丝苏氨酸蛋白激酶(PI3K/AKT)通路在心力衰竭进展中的作用。方法构建大鼠心力衰竭模型,同时用AngⅡ处理(100 n M,24 h)大鼠心肌细胞H9C2构建心力衰竭体外模型。H9C2细胞转染miR-423-5p的抑制剂和模拟剂实现miR-423-5p的敲除和过表达;LY294002用来抑制PI3K/AKT通路的激活。RT-PCR技术检测miR-423-5p的表达; Western blot检测凋亡相关蛋白Bcl-2、Bax、casapse-3/9及PI3K、AKT总蛋白及磷酸化蛋白的表达;流式细胞术检测细胞凋亡。结果 miR-423-5p的表达水平在模型组大鼠心肌组织和AngⅡ处理的H9C2细胞中升高;敲除miR-423-5p可抑制由AngⅡ造成的H9C2细胞凋亡,并促进了p-PI3K及p-AKT的表达,但敲除miR-423-5p的以上作用在PI3K/AKT通路被抑制后全部削弱。结论敲除miR-423-5p可通过激活PI3K/AKT通路抑制心肌细胞凋亡,进而缓解心力衰竭的恶性进展。
基金supported by grants from the Fundamental Research Funds for the Central Universities(2015FZA7013)the Natural Science Foundation of Zhejiang Province(LY15H160021)+3 种基金the National Natural Science Foundation of China(81101840 and 81302074)the Medical Science and Technology Project of Zhejiang Province(201472813)the Medical and Health Platform Backbone Personnel Plan of Zhejiang Province(2012RCB015 and 2013KYB107)the Innovative Research Group of the National Natural Science Foundation of China(81421062)
文摘BACKGROUND： It has been found that microRNA-423-5p （miR423-Sp） is an oncogenic factor and frequently upregulated in gastric carcinoma. However, the involvement of miR423- 5p in hepatocellular carcinoma （HCC） has been rarely reported. The aim of this study was to assess whether miR423-Sp is aberrantly expressed in HCC tissues, and to characterize its roles in the cancerous biology of HCC.
基金Supported by the National Natural Science Foundation of China,No.82274528.
文摘BACKGROUND Shifting from the inflammatory to the proliferative phase represents a pivotal step during managing diabetic foot ulcers(DFUs);however,existing medical interventions remain insufficient.MicroRNAs(miRs)highlight notable capacity for accelerating the repair process of DFUs.Previous research has demonstrated which miR-122-5p regulates matrix metalloproteinases under diabetic conditions,thereby influencing extracellular matrix dynamics.AIM To investigate the impact of miR-122-5p on the transition from the inflammatory to the proliferative stage in DFU.METHODS Analysis for miR-122-5p expression in skin tissues from diabetic ulcer patients and mice was analyzed using quantitative real-time polymerase chain reaction(qRT-PCR).A diabetic wound healing model induced by streptozotocin was used,with mice receiving intradermal injections of adeno-associated virus-DJ encoding empty vector or miR-122.Skin tissues were retrieved at 3,7,and 14 days after injury for gene expression analysis,histology,immunohistochemistry,and network studies.The study explored miR-122-5p’s role in macrophage-fibroblast interactions and its effect on transitioning from inflammation to proliferation in DFU healing.RESULTS High-throughput sequencing revealed miR-122-5p as crucial for DFU healing.qRT-PCR showed significant upregulation of miR-122-5p within diabetic skin among DFU individuals and mice.Western blot,along with immunohistochemical and enzyme-linked immunosorbent assay,demonstrating the upregulation of inflammatory mediators(hypoxia inducible factor-1α,matrix metalloproteinase 9,tumor necrosis factor-α)and reduced fibrosis markers(fibronectin 1,α-smooth muscle actin)by targeting vascular endothelial growth factor.Fluorescence in situ hybridization indicated its expression localized to epidermal keratinocytes and fibroblasts in diabetic mice.Immunofluorescence revealed enhanced increased presence of M1 macrophages and reduced M2 polarization,highlighting its role in inflammation.MiR-122-5p elevated inflammatory cytokine levels while suppressing fibrotic activity from fibroblasts exposed to macrophage-derived media,highlighting its pivotal role in regulating DFU healing.CONCLUSION MiR-122-5p impedes cutaneous healing of diabetic mice via enhancing inflammation and inhibiting fibrosis,offering insights into miR roles in human skin wound repair.
基金supported by the National Natural Science Foundation of China(Grant No.:82225048)the Dalian Science and Technology Leading Talents Project,China(Grant No.:2019RD15)Sanming Project of Medicine in Shenzhen,China(Grant No.:SZZYSM202106004).
文摘Elemene is widely recognized as an effective anti-cancer compound and is routinely administered in Chinese clinical settings for the management of several solid tumors,including non-small cell lung cancer(NSCLC).However,its detailed molecular mechanism has not been adequately demonstrated.In this research,it was demonstrated that elemene effectively curtailed NSCLC growth in the patient-derived xenograft(PDX)model.Mechanistically,employing high-throughput screening techniques and subsequent biochemical validations such as microscale thermophoresis(MST),microRNA-145-5p(miR-145-5p)was pinpointed as a critical target through which elemene exerts its anti-tumor effects.Interestingly,elemene serves as a binding stabilizer for miR-145-5p,demonstrating a strong binding affinity(dissociation constant(KD)=0.39±0.17μg/mL)and preventing its degradation both in vitro and in vivo,while not interfering with the synthesis of the primary microRNA transcripts(pri-miRNAs)and precursor miRNAs(pre-miRNAs).The stabilization of miR-145-5p by elemene resulted in an increased level of this miRNA,subsequently suppressing NSCLC progression through the miR-145-5p/mitogen-activated protein kinase kinase kinase 3(MAP3K3)/nuclear factor kappaB(NF-κB)pathway.Our findings provide a new perspective on revealing the interaction patterns between clinical anti-tumor drugs and miRNAs.
