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
目的探讨新生儿急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)患者血清miR-183-5p的表达及其与白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)及肿瘤坏死因子-α(TNF-α)的相关性。方法选取保定市第二中心医院收治的87例...目的探讨新生儿急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)患者血清miR-183-5p的表达及其与白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)及肿瘤坏死因子-α(TNF-α)的相关性。方法选取保定市第二中心医院收治的87例ARDS新生儿为研究对象。根据ARDS患儿出院时生存情况分为生存组(n=68)和死亡组(n=24),按照新生儿危重评分结果分为非危重组(n=53,>90分)、危重组(n=24,70~90分)、极危重组(n=15,<70分),比较各组血清miR-183-5p,IL-1β,IL-6及TNF-α水平差异。ARDS患儿miR-183-5p与IL-1β,IL-6及TNF-α的相关性采用Pearson相关分析。结果与生存组比较,死亡组血清miR-183-5p(2.15±0.94 vs 0.96±0.38),IL-1β(168.20±30.62 vs 110.25±19.30,pg/mL),IL-6(217.28±44.27 vs 151.30±32.46,pg/mL)及TNF-α(81.16±19.24 vs 48.27±14.30,pg/mL)水平均明显升高(P<0.001)。随着病情加重ARDS患儿血清miR-183-5p,IL-1β,IL-6及TNF-α水平逐渐升高,极危重组>危重组>非危重组(P<0.001)。相关分析显示,ARDS患儿血清miR-183-5p表达水平与IL-1β,IL-6及TNF-α均呈正相关(P<0.001)。结论ARDS患儿血清miR-183-5p高表达与IL-1β,IL-6,TNF-α水平及病情严重程度相关,可能是预测ARDS患儿病情严重程度的生物学指标。展开更多
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.
文摘目的探讨新生儿急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)患者血清miR-183-5p的表达及其与白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)及肿瘤坏死因子-α(TNF-α)的相关性。方法选取保定市第二中心医院收治的87例ARDS新生儿为研究对象。根据ARDS患儿出院时生存情况分为生存组(n=68)和死亡组(n=24),按照新生儿危重评分结果分为非危重组(n=53,>90分)、危重组(n=24,70~90分)、极危重组(n=15,<70分),比较各组血清miR-183-5p,IL-1β,IL-6及TNF-α水平差异。ARDS患儿miR-183-5p与IL-1β,IL-6及TNF-α的相关性采用Pearson相关分析。结果与生存组比较,死亡组血清miR-183-5p(2.15±0.94 vs 0.96±0.38),IL-1β(168.20±30.62 vs 110.25±19.30,pg/mL),IL-6(217.28±44.27 vs 151.30±32.46,pg/mL)及TNF-α(81.16±19.24 vs 48.27±14.30,pg/mL)水平均明显升高(P<0.001)。随着病情加重ARDS患儿血清miR-183-5p,IL-1β,IL-6及TNF-α水平逐渐升高,极危重组>危重组>非危重组(P<0.001)。相关分析显示,ARDS患儿血清miR-183-5p表达水平与IL-1β,IL-6及TNF-α均呈正相关(P<0.001)。结论ARDS患儿血清miR-183-5p高表达与IL-1β,IL-6,TNF-α水平及病情严重程度相关,可能是预测ARDS患儿病情严重程度的生物学指标。
