下调miR-106a-5p对过氧化氢诱导的心肌细胞损伤及JAK1/STAT3通路的影响

目的 探讨下调miR-106a-5p对过氧化氢(H₂O₂)诱导的心肌细胞损伤及Janus激酶1(JAK1)/信号转导和转录激活因子3(STAT3)通路的影响。方法 不同浓度梯度H₂O₂(0、50、100、200、400μmol/L)处理大鼠心肌细胞H9c2。H9c2细胞分为对照组、H₂O₂组(100μmol/L H₂O₂)、miR-106a-5p NC组(100μmol/L H₂O₂+转染miR-106a-5p NC)和miR-106a-5p siRNA组(100μmol/L H₂O₂+转染miR-106a-5p siRNA)。实时荧光定量PCR(qPCR)法检测miR-106a-5p表达;CCK-8法检测细胞增殖;流式细胞仪检测细胞凋亡;试剂盒检测细胞培养液中乳酸脱氢酶(LDH)含量、谷胱甘肽过氧化物酶(GSH-Px)活性及...     

PEITC promotes neurite growth in primary sensory neurons via the miR-17-5p/STAT3/GAP-43 axis

The present study explored a key miRNA that plays a vital role in sciatic nerve conditioning injury promoting repair of injured dorsal column, and validated its function. Microarray analysis revealed miR-17-5p expression decreased sharply at 3, 7 and 14?days in the sciatic nerve conditioning injury group compared with the simple dorsal column lesion group. After miR-17-5p inhibition in DRG neurons, GAP-43 expression was upregulated and neurite growth was increased. STAT3 together with p-STAT3 showed opposite trends with miR-17-5p. MiR-17-5p inhibition extended neurite and upregulated STAT3, p-STAT3 and GAP-43. To further determine a substitution therapy for sciatic nerve conditioning injury, beta-phenethyl isothiocyanate (PEITC), which downregulates miR-17-5p, was assessed. The results showed that treatment with 10?µM PEITC resulted in longest neurite length. Further experiments demonstrated PEITC induced neurite growth by inhibiting miR-17-5p and further upregulating STAT3, p-STAT3 and GAP-43. The somatosensory evoked potential test confirmed similar treatment effects for PEITC, Ad-miRNA-17-5p inhibitor, and sciatic nerve conditioning injury on the dorsal column lesion. In conclusion, the miR-17-5p/STAT3/GAP-43 axis is an indispensable component of sciatic nerve conditioning injury promoting repair of injured dorsal column. PEITC could promote repair of injured dorsal column via the miR-17-5p/STAT3/GAP-43 axis, and could mimic the treatment effect of sciatic nerve conditioning injury.     

Alisol A 24-acetate protects oxygen–glucose deprivation-induced brain microvascular endothelial cells against apoptosis through miR-92a-3p inhibition by targeting the B-cell lymphoma-2 gene

ContextAlisol A 24-acetate has been used to treat vascular diseases. However, the underlying mechanisms still remain unclear.ObjectiveThe present study evaluated the antiapoptotic effect of alisol A 24-acetate on brain microvascular endothelial cells (BMECs) and explored the underlying mechanisms.Materials and methodsBMECs were injured through oxygen -glucose deprivation (OGD) after alisol A 24-acetate treatment. Cell viability and half-maximal inhibitory concentration (IC₅₀) were measured using CCK-8, whereas inflammatory factors and oxidative stress indicators were measured using enzyme linked immunosorbent assay. Cell invasion and wound healing assays were detected. Cell apoptosis was assessed using flow cytometry. B-cell lymphoma-2 (Bcl-2) and Bcl-2 associated X (Bax) expression were analyzed using Western blotting. Dual-luciferase assay was applied to detect target genes of miR-92a-3p.ResultAlisol A 24-acetate had an IC₅₀ of 98.53 mg/L and inhibited cell viability at concentrations over 50mg/L. OGD induced apoptosis and promoted miR-92a-3p overexpression in BMECs. However, alisol A 24-acetate treatment suppressed inflammation, improved migration and invasion abilities, increased Bcl-2 expression, inhibited Bax expression, and repressed apoptosis and miR92a-3p overexpression in OGD-induced BMECs. MiR-92a-3p overexpression promoted cell apoptosis and suppressed Bcl-2 expression, whereas its inhibitor reversed the tendency. Alisol A 24-acetate treatment relieved the effects of miR-92a-3p overexpression. Dual-luciferase assay confirmed that miR-92a-3p negatively regulated the Bcl-2 expression.ConclusionsThese findings suggest that alisol A 24-acetate exerts antiapoptotic effects on OGD-induced BMECs through miR-92a-3p inhibition by targeting the Bcl-2 gene, indicating its potential for BMECs protection and as a novel therapeutic agent for the treatment of cerebrovascular disease.     

依巴斯汀联合马齿苋治疗特应性皮炎的临床观察

目的 探讨依巴斯汀联合马齿苋治疗特应性皮炎（atopic dermatitis，AD）的临床疗效及对miR-186-5p、miR-409-3p水平、免疫状态的影响。方法 2014年10月至2017年10月在新疆医科大学附属中医医院就诊的112例AD患者被随机分为对照组和观察组，每组56例。对照组口服依巴斯汀，观察组在对照组基础上进行马齿苋塌渍治疗。比较治疗前、治疗2周、4周的症状评分和临床有效率，比较治疗前后外周血Th17/Treg、IL17水平以及皮损边缘皮肤标本的miR-186-5p、miR-409-3p表达。结果 治疗前，2组各指标均无显著差异，治疗2，4周后，观察组症状评分显著低于对照组（P<0.05）；治疗2，4周时观察组的总有效率分别为66.07%，80.36%，显著高于对照组35.72%，57.14%（P<0.05）。治疗后2组Th17%、Th17/Treg、IL-17均显著下降，且观察组显著低于对照组（P<0.05）；2组miR-186-5p、miR-409-3p表达均显著下降，且观察组显著低于对照组（P<0.05）。结论 依巴斯汀联合马齿苋能有效改善AD临床症状，提高疗效，下调皮肤中miR-186-5p、miR-409-3p的表达，降低血清Th17/Treg表达，改善炎症状态。     

MiR-599 regulates LPS-mediated apoptosis and inflammatory responses through the JAK2/STAT3 signalling pathway via targeting ROCK1 in human umbilical vein endothelial cells

MicroRNA plays an integral role in the development of atherosclerosis. Our study aimed to investigate the roles of miR-599 in lipopolysaccharide (LPS)-induced endothelial damage in human umbilical vein endothelial cells (HUVECs). HUVECs were transfected with a miR-599 mimic and negative control, and then exposed to LPS. The expression of miR-599 was detected by quantitative real time-polymerase chain reaction (RT-qPCR). Cell viability was analyzed by CCK-8 assay and trypan blue exclusion assay; the formation of DNA fragments was tested by Cell Death Detection ELISA Plus kit; the incidence of apoptosis was detected by flow cytometry; the expression of p53 and cleaved-caspase 3 (c-caspase 3) was evaluated by western blot. Moreover, the mRNA levels and concentrations of tumour necrosis factor (TNF)-α, interleukin (IL)-6, ICAM-1 and VCAM-1 were assayed by RT-qPCR and ELISA. The results showed that overexpression of miR-599 increased cell viability, reduced DNA fragments, the incidence of apoptosis, as well as the protein levels of p53 and c-caspase 3 in the presence of LPS. TNF-α, IL-6, ICAM-1 and VCAM-1 mRNA levels and concentrations were also decreased upon miR-599 upregulation. In addition, the dual luciferase reporter assay demonstrated that ROCK1 is a direct target of miR-599. MiR-599 overexpression inhibited ROCK1 expression. Induced expression of ROCK1 reversed the roles of miR-599 in apoptosis and inflammation. The gain function of miR-599 function inhibited activation of the JAK2/STAT3 signalling pathway, which was abrogated by overexpression of ROCK1. Taken together, our results indicate that miR-599 attenuates LPS-caused cell apoptosis and inflammatory responses through the JAK2/STAT3 signalling pathway via targeting ROCK1.     

灯盏花乙素对非小细胞肺癌细胞JAK/STAT信号通路的影响

目的 研究灯盏花乙素对非小细胞肺癌细胞JAK/STAT信号通路及其凋亡机制的影响。方法 培养非小细胞肺癌A549细胞,经不同浓度灯盏花乙素处理24 h后收集细胞。采用MTT法观察细胞增殖,流式细胞术检测细胞凋亡;RT-qPCR法检测JAK2,STAT3,Pim1和Bcl-2的mRNA表达情况;Western blot检测JAK2和STAT3蛋白表达水平。结果 MTT法和流式细胞术结果显示,灯盏花乙素能降低A549细胞的存活率,促进其凋亡,并呈剂量依赖效应;RT-qPCR和Western blot结果显示,与对照组比较,灯盏花乙素各组JAK2,STAT3,Pim1和Bcl-2的mRNA表达降低,JAK2和STAT3蛋白水平下降,且与加入的灯盏花乙素浓度成反比。结论 灯盏花乙素可以促进非小细胞肺癌A549细胞凋亡,其机制可能是通过抑制JAK/STAT信号转导通路的激活,减少JAK2和STAT3蛋白的表达。     

LncRNA GAS5 inhibits Th17 differentiation and alleviates immune thrombocytopenia via promoting the ubiquitination of STAT3

BackgroundThe increased differentiation of T helper 17 cells (Th17) accelerates the development of immune thrombocytopenia (ITP), which is a common autoimmune disease with limited therapeutic methods. Recent studies have revealed that long non-coding RNAs (lncRNAs) play a critical role in autoimmune diseases, thus this study aims to investigate the effect of lncRNA GAS5 on the differentiation of Th17 cells in ITP.MethodsThe expression of GAS5 in peripheral blood mononuclear cells (PBMCs) of ITP patients and spleen tissues of ITP mice was measured by qRT-PCR. The percentage of Th17 cells in CD4⁺ cells was measured by flow cytometry. The combination between GAS5 and STAT3 was confirmed by RNA pull-down assay and RNA Binding Protein Immunoprecipitation (RIP). The ubiquitination of STAT3 was detected by ubiquitination assay and the interaction between STAT3 and TRAF6 was measured by Co-Immunoprecipitation (Co-IP). Finally, the effect of GAS5 on Th17 differentiation was investigated in vitro and in vivo using lentivirus (lenti)-GAS5.ResultsGAS5 expression was downregulated both in PBMCs of ITP patients and spleen tissues of ITP mice. Overexpression of GAS5 suppressed Th17 differentiation while had no effect on Treg differentiation in naïve CD4⁺ cells. RNA pull-down and RNA immunoprecipitation assays confirmed the interaction between GAS5 and STAT3. Further studies showed GAS5 accelerated the degradation of STAT3 via promoting TRAF6-mediated ubiquitination. Overexpressing GAS5 suppressed Th17 differentiation in vitro and alleviated ITP in vivo via reducing STAT3.ConclusionLncRNA GAS5 inhibited Th17 differentiation through promoting the TRAF6-mediated ubiquitination of STAT3, thus relieving ITP.     

Long non-coding RNA THRIL promotes LPS-induced inflammatory injury by down-regulating microRNA-125b in ATDC5 cells

BackgroundOsteoarthritis is an age-related disorder of bone-joint that causes pain and disability in middle and older people. This study aimed to investigate the potential effects of long non-coding RNA (lncRNA) THRIL on lipopolysaccharide (LPS)-induced osteoarthritis cell injury model (ATDC5 cell inflammatory injury), as well as the possible internal molecular mechanisms.MethodsCell viability and apoptosis were assessed using CCK-8 assay and Guava Nexin assay, respectively. Cell transfection was conducted to change the expression of THRIL and microRNA-125b (miR-125b) in ATDC5 cells. qRT-PCR was performed to detect the expression of THRIL, miR-125b and pro-inflammatory cytokines IL-6, TNF-α and monocyte chemotactic protein 1 (MCP-1) in ATDC5 cells. ELISA was used to measure the concentrations of IL-6, TNF-α and MCP-1 in culture supernatant of ATDC5 cells. Finally, the protein expression of key factors involved in cell apoptosis, inflammatory response, JAK1/STAT3 and NF-κB pathways were evaluated using western blotting.ResultsLPS significantly induced ATDC5 cell inflammatory injury and up-regulated the expression of THRIL. Overexpression of THRIL aggravated the LPS-induced ATDC5 cell inflammatory injury. Suppression of THRIL had opposite effects. Moreover, THRIL negatively regulated the expression of miR-125b in ATDC5 cells. miR-125b participated in the effects of THRIL overexpression on LPS-induced ATDC5 cell inflammatory injury. Furthermore, overexpression of THRIL enhanced the LPS-induced JAK1/STAT3 and NF-κB pathways activation by down-regulating miR-125b.ConclusionTHRIL exerted pro-inflammatory roles in LPS-induced osteoarthritis cell injury model. Overexpression of THRIL promoted LPS-induced ATDC5 cell inflammatory injury by down-regulating miR-125b and then activating JAK1/STAT3 and NF-κB pathways.     

miR-125a-5p对卵巢癌细胞的增殖迁移和侵袭能力的影响

目的 探讨miR-125a-5p对卵巢癌细胞增殖、迁移和侵袭的影响及其作用的靶基因。方法 购入正常人卵巢上皮细胞HOSEpiC,卵巢癌细胞SKOV3、A2780、ES2和HO8910各1株,通过实时定量聚合酶链式反应（RT-PCR）检测人卵巢上皮细胞HOSEpiC以及卵巢癌细胞SKOV3、A2780、ES2和HO8910中miR-125a-5p的表达水平。利用生物信息学方法预测miR-125a-5p的靶基因,构建预测靶基因3’端非编码区（3’-UTR）的野生型（WT）和突变型（mut）荧光素酶报告基因质粒,通过双荧光素酶报告基因法验证miR-125a-5p与预测靶基因的靶向作用。利用慢病毒感染的方法建立稳定过表达miR-125a-5p的SKOV3细胞,使用荧光定量PCR和Western blot检测靶基因的表达水平。利用细胞计数试剂盒-8（CCK-8）分析过表达miR-125a-5p的SKOV3细胞增殖能力的变化,通过Transwell迁移和侵袭试验分析过表达miR-125a-5p的SKOV3细胞迁移和侵袭能力的变化。结果 正常人卵巢上皮细胞HOSEpiC中miR-125a-5p的表达水平高于卵巢癌细胞SKOV3、A2780、ES2和HO8910中miR-125a-5p的表达水平,其中SKOV3中miR-125a-5p的表达水平最低,差异均有统计学意义（P<0.05）,选择SKOV3进行后续实验。生物信息学分析显示,miR-125a-5p能够靶向结合Rab3D的3’-UTR;双荧光素酶报告基因分析证实miR-125a-5p能够靶向作用于Rab3D的3’-UTR。筛选稳定表达miR-125a-5p和si-Rab3D及相应对照的SKOV3细胞,分别命名为SKOV3/miR-125a-5p组,SKOV3/si-Rab3D组,SKOV3/miR-NC组和SKOV3/si-NC组。在SKOV3/miR-125a-5p组中,Rab3D的表达水平低于SKOV3组和SKOV3/miR-NC组,差异均有统计学意义（P<0.05）。细胞增殖能力检测结果显示,与SKOV3组和SKOV3/miR-NC组相比,SKOV3/miR-125a-5p组在72小时和96小时细胞增殖能力降低,差异有统计学意义（P<0.05）。Transwell迁移和侵袭试验结果显示,SKOV3/miR-125a-5p组分别与SKOV3组和SKOV3/miR-NC组相比,细胞迁移和侵袭能力均显著下降,差异有统计学意义（P<0.05）。结论 miR-125a-5p能够靶向作用Rab3D,抑制卵巢癌细胞的增殖、迁移和侵袭。     

MicroRNA expression profiling of Chinese follicular lymphoma by microarray: A preliminary study

BackgroundMicroRNAs (miRNAs) have been widely regarded as crucial regulators in various biological processes involved in carcinogenesis. However, the comprehensive miRNA profiles of Chinese follicular lymphoma (FL) remains completely unknown.MethodsThe Exiqon miRCURY LNA™ microRNA Array (v.18.0) was used to detect the miRNA expression profiles of three Chinese FL samples, and compared to three reactive lymphatic nodes (RLN). Quantitative real-time polymerase chain reaction (qRT-PCR) was used to confirm the selected miRNAs in different series. Three databases (miRAnda, miRBase and TargetScan) were used to predict the putative target genes. Bioinformatic analysis (gene ontology analysis and pathway analysis) was performed for further evaluation.ResultsThe microarray assay demonstrated that 1643 miRNAs were expressed; in which 103 miRNAs were upregulated and 68 miRNAs were downregulated, according to P-value (< 0.05) and fold change (FC > 2-fold). Furthermore, qRT-PCR was used to confirm that miR-17-5p, miR-20a-5p and miR-19a-3p were upregulated, and miR-3615 was downregulated (P < 0.05). Bioinformatic analysis (gene ontology analysis and pathway analysis) was used for further evaluation. Pathway analysis indicated that 25 pathways corresponded to differentially expressed miRNAs (P-value cut-off is 0.05). Furthermore, miR-17-5p, miR-20a-5p and miR-19a-3p were validated by qRT-PCR in an independent series including five FL3a and five RLN cases. Data analysis revealed that the changing trend of miR-19a-3p and miR-17-5p expression in the independent series was basically identical with that of the microarray data.ConclusionsOur results are the first to reveal the miRNA expression profiling of Chinese FL and three upregulated miRNAs. Furthermore, the expression of miR-19a-3p and miR-17-5p were found to be significantly upregulated in FL3a. Further study needs to be urgently performed to reveal its potential role in the pathogenesis of FL in the near future.     

基于miR-370-3p与JAK2/STAT3通路相关性探讨活血荣络方促缺血性脑卒中后血管新生的机制

目的基于miR-370-3p与JAK2/STAT3通路相关性探讨活血荣络方促缺血性脑卒中后血管新生的机制。方法将大鼠随机分为6组,MCAO/R法造模,灌胃给药7 d后免疫荧光染色观察脑组织CD31、vWF及血管内皮生长因子(vascular endothelial growth factor,VEGF)表达;Western blot法检测脑组织JAK2、p-JAK2、STAT3、p-STAT3蛋白的表达;Real-time PCR(RT-PCR)法检测脑组织JAK2、STAT3 mRNA及miR-370-3p的表达;Pearson相关性分析脑组织miR-370-3p与JAK2/STAT3通路的相关性;培养大鼠脑血管平滑肌细胞,实时荧光定量PCR(RT-qPCR)检测LncRNA-H19和miR-370-3p表达;荧光素酶报告实验检测LncRNA-H19和miR-370-3p的靶向关系。结果活血荣络方能增加缺血区微血管密度及VEGF平均荧光强度,上调JAK2、STAT3 mRNA,下调miR-370-3p表达,促进JAK2、p-JAK2、STAT3、p-STAT3表达,且miR-370-3p分别与JAK2、STAT3 mRNA呈高度负相关,此过程能被STAT3 SH2结构域抑制剂Stattic逆转。结论活血荣络方可能通过下调miR-370-3p的表达、激活JAK2/STAT3通路、促进下游VEGF的表达而刺激缺血性脑卒中后血管新生,从而改善神经功能缺损症状。     

Long non-coding RNA SNHG16 promotes lipopolysaccharides-induced acute pneumonia in A549 cells via targeting miR-370-3p/IGF2 axis

BackgroundPneumonia is an infectious lung inflammation in children with high mortality and morbidity rates. Small nucleolar RNA host gene 16 (SNHG16) has been verified to accelerate the progression of acute pneumonia. However, the role of SNHG16 in acute pneumonia has not yet been fully elucidated. The study was aimed to explore the regulatory mechanism of SNHG16 in LPS-induced acute pneumonia in A549 cells.MethodsThe levels of SNHG16, miR-370-3p and IGF2 in serum samples and LPS-induced A549 cells were detected by quantitative real-time polymerase chain reaction (qRT-PCR). The cell viability and apoptosis of A549 cells were examined by Cell Counting Kit-8 (CCK-8) assay and flow cytometer, respectively. The levels of interleukin 1β (IL-1β), interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α) were determined by enzyme-linked immunosorbent assay (ELISA). The binding relationships among SNHG16, miR-370-3p and IGF2 were predicted by online database and verified by Dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. The protein levels of IGF2 were tested by Western blot.ResultsSNHG16 and IGF2 were upregulated while miR-370-3p was downregulated in serum of acute pneumonia patients and LPS-induced A549 cells. SNHG16 regulated proliferation, apoptosis and inflammatory cytokines by inhibiting miR-370-3p in LPS-induced A549 cells. MiR-370-3p targeted IGF2 and inhibited LPS-induced inflammatory injury via IGF2 in A549 cells. Furthermore, SNHG16 was verified to promote IGF2 expression by sponging miR-370-3p in A549 cells.ConclusionSNHG16 impeded cell viability and promoted apoptosis, inflammatory injury by targeting IGF2 mediated by miR-370-3p in LPS-induced A549 cells.     

Increased IL-10/IL-17 ratio is aggravated along with the prognosis of patients with chronic lymphocytic leukemia

ObjectiveThis study is to investigate the association between the Treg/Th17 cells and prognosis of chronic lymphocytic leukemia (CLL).MethodsTotally 50 CLL patients and 20 Health controls were included in this study. Regulatory T (Treg) cells and the cell subset secreting IL-17 (Th17) in peripheral blood were detected with flow cytometry. Serum levels of IL-10 and IL-17 were determined with ELISA, and expression of Foxp3 and RORγt was assessed with quantitative real-time PCR.ResultsTreg and Th17 cell proportions in peripheral blood in the CLL patients were significantly higher than control. Serum levels of IL-10 and IL-17, and expression of Foxp3 and RORγt, were significantly increased in the CLL patients. Ratios of Treg/Th17 and IL-10/IL-17 were significantly elevated in the CLL patients. Compared with those before treatment, Treg/Th17 and IL-10/IL-17 ratios were declined in the CLL patients in remission. Compared with the non-remission group, Treg cells were significantly decreased, while Th17 cells were significantly increased, resulting in decreased Treg/Th17 ratio, in the remission group. Moreover, the serum IL-10 level was significantly decreased, while the serum IL-17 level was significantly increased, resulting in declined IL-10/IL-17 ratio, in the remission group. Correlation analysis showed that, Treg and Th17 cell counts were significantly associated with CD38 and ZAP-70 expression in the CLL patients. Moreover, the IL-10/IL-17 ratio was also significantly associated with CLL prognostic factors.ConclusionAltered Treg/Th17 and IL-10/IL-17 ratios in CLL would be aggravated along with the disease progression, which might be used as indicators for the disease prognosis.