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.     

miR-186-5p对冠心病大鼠血管内皮细胞损伤及FGF2/FGFR1信号通路的影响

目的　探究微小RNA-186-5p（miR-186-5p）对冠心病（CHD）大鼠血管内皮细胞损伤的影响,以及对成纤维细胞生长因子2（FGF2）/成纤维细胞生长因子受体1（FGFR1）信号通路的作用。方法　48只雄性SD大鼠均分成对照组、模型组、miR-186-5p抑制剂组和miR-186-5p抑制剂NC组。除对照组外,其余组大鼠均构建CHD模型,并给予相应干预4周。测定大鼠左心室射血分数（LVEF）、左心室缩短分数（LVFS）以及血清中总胆固醇（TC）、三酰甘油（TG）、高密度脂蛋白胆固醇（HDL-C）、低密度脂蛋白胆固醇（LDL-C）、白细胞介素（IL）-1β、IL-6和肿瘤坏死因子（TNF）-α、一氧化氮（NO）和内皮素（ET）-1水平;苏木素-伊红（HE）染色观察各组大鼠冠状动脉组织的病理学变化;Western blot法检测大鼠冠状动脉组织中FGF2、FGFR1蛋白相对表达水平;双荧光素酶验证miR-186-5p与FGF2的靶向关系。结果　对照组大鼠冠状动脉血管管壁形态均匀,无炎性细胞浸润;模型组和miR-186-5p抑制剂NC组血管内皮细胞排列紊乱,炎性细胞浸润明显;miR-186-5p抑制剂组较模型组病理变化程度减轻,炎性细胞浸润减少。与对照组比较,模型组LVEF、LVFS、HDL-C、NO水平及FGF2、FGFR1蛋白相对表达水平降低,而TC、TG、LDL-C、IL-1β、IL-6、TNF-α、ET-1水平升高（P＜0.05）。与模型组和miR-186-5p抑制剂NC组比较,miR-186-5p抑制剂组大鼠LVEF、LVFS、HDL-C、NO水平及FGF2、FGFR1蛋白相对表达水平升高,而TC、TG、LDL-C、IL-1β、IL-6、TNF-α、ET-1水平降低（P＜0.05）。模型组和miR-186-5p抑制剂NC组各指标差异无统计学意义（P＞0.05）。双荧光素酶报告实验结果证实,miR-186-5p与FGF2存在靶向结合位点。结论　miR-186-5p的下调可减轻CHD大鼠的炎症反应和血管内皮细胞损伤,该作用与激活FGF2/FGFR1信号通路有关。     

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.     

LncRNA CDKN2B-AS1 relieved inflammation of ulcerative colitis via sponging miR-16 and miR-195

BackgroundThis study was aimed to explore the differential expression of lncRNA CDKN2B-AS1-miR-195-5p/miR-16-5p axis in ulcerative colitis (UC) and its role in regulating UC pathogenesis.MethodsOne hundred and eighty-seven UC patients and one hundred and fifty-two healthy volunteers were recruited, and their blood samples were collected. Inflammatory cytokines in serum were determined with ELISA, and lncRNA CDKN2B-AS1, miR-195-5p and miR-16-5p levels were detected with RT-PCR. Then pcDNA3.1-CDKN2B-AS1, si-CDKN2B-AS1, miR-195-5p mimic, miR-195-5p inhibitor, miR-16-5p mimic and miR-16-5p inhibitor were transfected into HT29 cells, and proliferation and apoptosis of the cells were assessed. Dual-luciferase reporter gene assay was implemented to identify the sponging relationship between lncRNA CDKN2B-AS1 and miR-195-5p/miR-16-5p.ResultsCDKN2B-AS1 level was negatively correlated with levels of inflammatory cytokines, including TNF-α, IL-6 and sIL-2R, yet miR-16-5p and miR-195-5p levels were negatively correlated with the CDKN2B-AS1 level. The CDKN2B-AS1 combined with miR-16-5p and miR-195-5p also achieved an optimum efficacy in differentiating between light and medium UC, light and severe UC, as well as medium and heavy UC. Furthermore, pcDNA3.1-CDKN2B-AS1 depressed expressions of IFN-γ, IL-8, IL-1β and TNF-α in HT29 cells (P < 0.05), and strengthened proliferation of the cells (P < 0.05). CDKN2B-AS1 also sponged and regulated miR-16-5p and miR-195-5p in HT29 cells, and miR-16-5p and miR-195-5p could reverse the effect of CDKN2B-AS1 on inflammatory cytokine production, barrier function and apoptosis of HT29 cells (P < 0.05).ConclusionLncRNA CDKN2B-AS1 regulated inflammation of UC by sponging miR-195-5p and miR-16-5p, providing an alternative for diagnosis and treatment of UC.     

Tanshinone IIA prevents uric acid nephropathy in rats through NF-κB inhibition

The purpose of this research is to investigate the effect of tanshinone IIA, an extract of the Chinese medicine Que Xie Hua Yu Tang, on uric acid nephropathy (UAN) and to elucidate the underlying mechanisms. UAN rat model was established. Fifty UAN rats were randomly allocated into 5 groups: adenine-treated group, allopurinol-treated group, and low/middle/high dose of tanshinone IIA-treated groups. Meanwhile, another 10 rats were used as normal controls. Serum uric acid (UA), blood urea nitrogen (BUN), serum creatinine (Scr), MCP-1, and IL-1β levels were measured. Histological staining was performed. Comparison between the adenine group and treatment (allopurinol and tanshinone IIA) groups showed compound treatment could attenuate the inflammation status of the kidneys and decrease serum UA levels. Among different kinds of medicine, tanshinone IIA had similar effects as allopurinol and exerted anti-inflammatory and renal protective effect in a dose-dependent manner. Furthermore, we found tanshinone IIA alone could also inhibit urate-induced MCP-1 and IL-1β overexpression both in vivo and in vitro, accompanied with inhibition of NF-κB translocation from cytosome to nucleus. Tanshinone IIA could protect rats from uric acid-induced kidney damage, probably by attenuating renal inflammatory status.     

Knockdown of PVT1 inhibits IL-1β-induced injury in chondrocytes by regulating miR-27b-3p/TRAF3 axis

Long noncoding RNA plasmacytoma variant translocation 1 (PVT1) has been identified to implicate in the progression of osteoarthritis (OA). However, the mechanism underlying PVT1 in OA development remains largely unknown. This study aimed to investigate the effect of PVT1 on interleukin-1 beta (IL-1β)-induced injury in chondrocytes and explore potential mechanism. The cartilage tissues from 25 OA patients and normal controls were collected. Human transformed chondrocytes C28/I2 were stimulated by IL-1β. The levels of PVT1, microRNA (miR)-27b-3p, and tumor necrosis factor receptor-associated factor 3 (TRAF3) were detected by quantitative real-time polymerase chain reaction or western blot. IL-1β-induced injury was investigated by cell viability, apoptosis, autophagy and inflammatory response using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide, flow cytometry, western blot and enzyme linked immunosorbent assay, respectively. The target association between miR-27b-3p and PVT1 or TRAF3 was explored by luciferase reporter, RNA immunoprecipitation and RNA pull-down assays. We found that PVT1 expression was enhanced in OA patients and IL-1β-treated C28/I2 cells. Silence of PVT1 promoted cell viability and autophagy but suppressed apoptosis and inflammatory response in IL-1β-treated C28/I2 cells. miR-27b-3p was confirmed as a target of PVT1 and its deficiency reversed the suppressive effect of PVT1 knockdown on IL-1β-induced injury. TRAF3 was a target of miR-27b-3p and attenuated the effect of miR-27b-3p on IL-1β-induced injury in C28/I2 cells. Moreover, TRAF3 expression was positively regulated by PVT1 via sponging miR-27b-3p. Collectively, knockdown of PVT1 increased cell viability and autophagy but inhibited apoptosis and inflammatory response in chondrocytes treated by IL-1β via up-regulating miR-27b-3p and down-regulating TRAF3.     

微小RNA-182-5p调控焦亡参与肝缺血再灌注损伤

摘要：目的 探讨微小RNA-182-5p（miR-182-5p）靶向调控叉形头转录因子O亚型3a（FoxO3a）调节焦亡对肝 缺血再灌注损伤的影响。方法 建立小鼠肝脏缺血再灌注模型。按随机数字表法将40只小鼠分为5组,每组8只, 分别为假手术（sham）组,缺血再灌注（IR）各组（缺血1.5 h,按再灌注时间分为IR 2 h组、IR 6 h组、IR 12 h组和IR 24 h 组）。细胞实验分组分为两部分,（1）缺氧模型建立,分为 control 组和 IR 组。（2）缺氧/复氧模型建立,分为对照组、 mimic组,inhibitor组和inhibitor+siRNA组。HE染色观察肝组织病理变化;免疫细胞化学染色检测FoxO3a表达分布 情况;荧光实时定量PCR（qRT-PCR）和Western blot 分别从mRNA和蛋白水平检测miR-182-5p、FoxO3a、半胱天冬 酶-1（Caspase1）、白细胞介素（IL）-1β、IL-18 表达情况;分析 miR-182-5p 与 FoxO3a 基因相关性;免疫荧光检测 Caspase1表达情况;ELISA检测IL-1β和IL-18表达情况;CCK-8试剂盒检测细胞活性变化情况。结果 IR处理后小 鼠肝组织损伤增加,再灌注12 h时损伤最重,同时FoxO3a、Caspase1、IL-1β、IL-18表达增加（P＜0.05）,诱导焦亡产 生;IR处理后小鼠肝组织内miR-182-5p表达水平较sham组升高（P＜0.05）。体外培养小鼠肝细胞AML12,IR处理 后miR-182-5p表达上调,FoxO3a表达下调,同时Caspase1表达升高（P＜0.05）。过表达miR-182-5p能降低FoxO3a 表达水平;反之能增加FoxO3a表达量,进而降低Caspase1、IL-1β、IL-18的表达,增加肝细胞活性（P＜0.05）。结论 激活miR-182-5p能加重肝缺血再灌注损伤,而抑制miR-182-5p能减轻肝缺血再灌注损伤,其机制可能与miR-182- 5p通过靶向调控FoxO3a激活肝细胞焦亡、影响Caspase1、IL-1β、IL-18表达有关。     

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.     

藁本内酯通过调控miR-133b-5p表达对脂多糖所致心肌损伤的保护作用

目的： 探讨藁本内酯（LIG）对脂多糖（LPS）所致心肌损伤的影响及分子机制。方法： 用质量浓度为10 mg·L^-1的LPS处理心肌细胞,记为LPS组,正常培养的细胞为对照（Con）组;用浓度分别为10,20,40 μmol·L^-1的藁本内酯处理心肌细胞后再用10 mg·L^-1的LPS处理,作为藁本内酯低、中、高浓度组;将miR-NC、miR-133b-5p转染至心肌细胞中再用10 mg·L^-1的LPS处理,记为LPS+miR-NC组、LPS+miR-133b-5p组;将anti-miR-NC、anti-miR-133b-5p转染至心肌细胞中再用40 μmol·L^-1的藁本内酯、10 mg·L^-1的LPS处理,记为LPS+LIG+anti-miR-NC组、LPS+LIG+anti-miR-133b-5p组。酶联免疫吸附法（ELISA）法检测肿瘤坏死因子-α（TNF-α）、白细胞介素-6（IL-6）水平;流式细胞术检测细胞凋亡;蛋白质印迹（Western blot）法检测B细胞淋巴瘤/白血病-2（Bcl-2）、Bcl-2相关X蛋白（Bax）蛋白表达;实时荧光定量PCR （RT-qPCR）检测miR-133b-5p表达水平。结果： 藁本内酯低、中、高浓度处理后,LPS诱导的心肌细胞中TNF-α、IL-6水平显著降低,细胞凋亡率显著降低,Bcl-2表达水平显著升高,Bax表达水平显著降低,miR-133b-5p表达水平显著升高,且呈浓度依赖性（P<0.05）。miR-133b-5p过表达可抑制LPS诱导的心肌细胞中TNF-α、IL-6水平和细胞凋亡。抑制miR-133b-5p表达逆转了藁本内酯对LPS所致的心肌细胞损伤的保护作用。结论： 藁本内酯通过上调miR-133b-5p表达可抑制LPS诱导的心肌细胞凋亡和炎症反应,对LPS诱导的心肌损伤具有保护作用。     

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.     

Notoginsenoside R1 up-regulates microRNA-132 to protect human lung fibroblast MRC-5 cells from lipopolysaccharide-caused injury

BackgroundPneumonia is a common lung disease in children with high fatality rate. Notoginsenoside R1 (NGR1) is the main active component extracted from the roots of Panax notoginseng (Burk.) F.H. Chen (Araliaceae). Here, we carefully explored the potential anti-inflammatory and protective effects of NGR1 on lipopolysaccharide (LPS)-induced lung fibroblast MRC-5 cell injury.MethodsViability and apoptosis of MRC-5 cells after different treatment or transfection were respectively assessed using CCK-8 assay and Annexin V-FITC/PI staining. The expression levels of microRNA-132 (miR-132), IL-1β, IL-6 and TNF-α in MRC-5 cells were measured using qRT-PCR. MicroRNA transfection was conducted to reduce the expression level of miR-132. Western blotting was used to analyze the protein expression levels of key factors involving in cell proliferation, apoptosis, NF-κB pathway and JNK pathway.ResultsLPS treatment caused MRC-5 cell proliferation inhibition, apoptosis and over-production of inflammatory cytokines. NGR1 treatment had no significant effects on MRC-5 cell proliferation, apoptosis and production of inflammatory cytokines, but protected MRC-5 cells from LPS-caused cell proliferation inhibition, apoptosis and over-production of inflammatory cytokines. In addition, NGR1 increased the expression level of miR-132 in MRC-5 cells. Knockdown of miR-132 reversed the protective effects of NGR1 on LPS-treated MRC-5 cells. Furthermore, NGR1 attenuated LPS-activated NF-κB and JNK pathways in MRC-5 cells via up-regulation of miR-132.ConclusionThis research confirmed the protective roles of NGR1 in lung fibroblast cell inflammatory injury. NGR1 protected MRC-5 cells from LPS-caused inflammatory injury through up-regulating miR-132 and then inactivating NF-κB and JNK pathways.     

木犀草素抑制JAK2/STAT3信号通路减轻大鼠脑缺血 再灌注损伤作用的研究

目的 观察木犀草素减轻大鼠脑缺血再灌注损伤的作用并探讨其潜在机制。方法 SD大鼠按随机数字 表法分为假手术组、大脑中动脉栓塞（MCAO）组、木犀草素低剂量组（50 mg/kg）、木犀草素高剂量组（100 mg/kg）及尼 莫地平组（15 mg/kg）,灌胃给药,共7 d。采用线栓法建立MCAO大鼠模型,比较神经功能损伤评分、脑组织含水量、 脑梗死体积,测定各组肿瘤坏死因子α（TNF-α）、白细胞介素（IL）-6、IL-1β、B细胞淋巴瘤因子2（Bcl-2）、Bcl-2相关 X蛋白（Bax）、半胱氨酸蛋白酶3（Caspase-3）含量及磷酸化Janus蛋白酪氨酸激酶2（p-JAK2）、磷酸化信号转导及转 录激活蛋白3（p-STAT3）蛋白表达等变化情况。结果 与假手术组比较,MCAO组大鼠神经功能损伤评分、脑组织含 水量、脑梗死体积、脑组织TNF-α、IL-6、IL-1β、Bax、Caspase-3含量及JAK2、STAT3蛋白磷酸化水平均明显增加（P＜ 0.05）,而脑组织Bcl-2含量明显降低（P＜0.05）;与MCAO组比较,木犀草素低、高剂量组及尼莫地平组大鼠神经功能 损伤评分、脑组织含水量、脑梗死体积、脑组织TNF-α、IL-6、IL-1β、Bax、Caspase-3含量及JAK2、STAT3蛋白磷酸化 水平均明显降低（P＜0.05）,而脑组织Bcl-2含量明显增加（P＜0.05）。结论 木犀草素具有减轻大鼠脑缺血再灌注 损伤的作用,该作用与抑制JAK2/STAT3信号通路活化,进而减弱炎症反应及减少细胞凋亡有关。     

Long non-coding RNA highly up-regulated in liver cancer protects tumor necrosis factor-alpha-induced inflammatory injury by down-regulation of microRNA-101 in ATDC5 cells

BackgroundOsteoarthritis (OA) is a familiar joint degenerative disease. Long non-coding RNAs (lncRNAs) play vital roles in the pathogenesis of OA. Nevertheless, the regulatory impacts of lncRNA highly up-regulated in liver cancer (lncRNA-HULC) on OA remain dimness. The study tried to probe the protective effect of HULC on ATDC5 cells against tumor necrosis factor-alpha (TNF-α)-induced inflammatory injury.MethodsRelative expression levels of pro-inflammatory cytokines (IL-6, IL-8 and MCP-1) and HULC in OA cartilage tissues and normal cartilage tissues were determined by RT-qPCR. TNF-α induced inflammatory injury model in ATDC5 cells was constructed, and the biological functions of HULC overexpression or suppression in TNF-α-injured ATDC5 cells were assessed. The relevancy between miR-101 and HULC was investigated by utilizing bioinformatics prediction, luciferase reporter assay, RNA pull-down and immunoprecipitation. MiR-101 mimic and inhibitor were transfected into ATDC5 cells, and its regulatory effect on TNF-α-injured ATDC5 cells was examined. Further, NF-κB and MAPK signaling pathways were finally detected by western blot.ResultsEnhancement of IL-6, IL-8 and MCP-1 were observated in OA cartilage tissues, but repression of HULC was discovered in OA cartilage tissues. HULC expression was decreased by TNF-α treatment, and overexpressed HULC significantly relieved TNF-α-induced ATDC5 cells injury. Additionally, miR-101 was mutual repressed with HULC, and overexpressed miR-101 reversed the protective effect of HULC in TNF-α-injured ATDC5 cells. Besides, HULC blocked NF-κB and MAPK pathways via repression of miR-101.ConclusionsThe discoveries testified that HULC protected ATDC5 cells against TNF-α-induced inflammatory injury by repression of miR-101.     

Bone marrow mesenchymal stem cells-derived exosomes improve injury of hippocampal neurons in rats with depression by upregulating microRNA-26a expression

ObjectiveBone marrow mesenchymal stem cells (BMSCs)-derived exosomes have been widely applied in disease therapies. However, the role of BMSCs-derived exosomes in depression remains obscure. This study aims to explore the mechanism of BMSCs-derived exosomal microRNA-26a (miR-26a) on hippocampal neuronal injury of depressed rats.MethodsBMSCs and their exosomes were obtained and identified. Rat models of depression were established by corticosterone injection, then injected with BMSCs-derived exosomes. The contents of superoxide dismutase (SOD), imalondialdehyde (MDA), lactate dehydrogenase (LDH), tumor necrosis factor α (TNF-α), and interleukin-1β (IL-1β) in rats’ serum, hippocampal tissues and neurons were determined. The expression of miR-26a in hippocampal tissues and neurons was detected by RT-qPCR. The injury models of rat hippocampal neurons were established to figure out the role of BMSCs-derived exosomes and miR-26a in neuron apoptosis and proliferation.ResultsIn hippocampal tissues of depressed rats, miR-26a was lowly expressed, and BMSCs-derived exosomes upregulated miR-26a expression. BMSCs-derived exosomes restrained apoptosis in hippocampal tissues of depressed rats. BMSCs-derived exosomes and upregulated miR-26a elevated SOD level, lessened MDA, LDH, TNF-α and IL-1β levels, boosted hippocampal neuron proliferation and suppressed apoptosis in depressed rats.ConclusionCollectively, our study reveals that miR-26a is lowly expressed in depressed rats, and BMSCs-derived exosomes improve hippocampal neuron injury of rat with depression by upregulating miR-26a.     

环状RNA CDR1as与miR-7在癫痫患者血浆中的表达及与脑电图异常的关系分析#br#

摘要：目的　探讨环状RNA小脑变性相关蛋白1反义转录物（CDR1as）与微小RNA-7（miR-7）在癫痫患者血浆中的表达及与脑电图异常的关系。方法　选取2016年12月—2019年12月在新乡医学院第二附属医院门诊及住院的癫痫患者87例为观察组，并根据脑电图结果分为正常组（6例）、轻度异常组（18例）、中度异常组（37例）及重度异常组（26例）；选取同期健康体检者90例为对照组。实时荧光定量PCR（qPCR）法检测血浆CDR1as、miR-7水平，酶联免疫吸附测定（ELISA）法检测血浆白细胞介素（IL）-2、肿瘤坏死因子（TNF）-α和IL-1β水平；Pearson法分析癫痫患者血浆CDR1as、miR-7水平与IL-2、TNF-α和IL-1β水平的相关性。结果　对照组、正常组、轻度异常组、中度异常组、重度异常组血浆CDR1as、IL-2、TNF-α和IL-1β水平总体呈升高变化，miR-7水平总体呈降低变化，差异均有统计学意义（P＜0.05）。癫痫患者血浆CDR1as水平与IL-2、TNF-α和IL-1β水平呈正相关（P＜0.05），miR-7水平与IL-2、TNF-α和IL-1β水平呈负相关（P＜0.05）。结论　CDR1as、miR-7在癫痫患者血浆中分别呈高表达、低表达，与炎症因子水平、脑电图异常程度密切相关，可能通过影响炎症反应引起脑部异常放电。     

黄芪提取物对大鼠局灶性脑缺血再灌注损伤后炎症因子及细胞凋亡的作用

目的研究黄芪提取物(EA)对局灶性脑缺血再灌注损伤的保护作用机制。方法采用线栓法大鼠局灶性脑缺血再灌注损伤模型,以免疫组化法观察EA对缺血再灌注后大鼠脑组织中TNFα表达的影响、以放免法观察对IL1β水平的影响、以TUNEL法观察对脑组织细胞凋亡的影响。结果与模型组比较,EA(20、40、80mg·kg-1,ig)能减少TNFα的表达、降低IL1β水平和减少细胞凋亡数。结论EA对大鼠局灶性脑缺血再灌注后脑组织中TNFα及IL1β的升高和神经元的凋亡有明显的抑制作用。     

长链非编码RNA LINC00662/微小RNA-16-5p/wee1信号通路对肝细胞癌细胞增殖及凋亡的作用研究

目的 探讨长链非编码RNA linc00662(LncRNA linc00662)通过微小RNA-16-5p(miR-16-5p)[/丝氨酸/苏氨酸蛋白激酶1(wee1)]信号轴在肝细胞癌（HCC）细胞增殖及凋亡中的作用。方法 该研究时间为2019年8月至2020年10月,体外培养正常肝细胞株LO2和肝癌细胞株SK-HEP-1、HepG2、Huh-7和Li-7。采用实时荧光定量聚合酶链反应（RT-PCR）检测细胞中linc00662、miR-16-5p和wee1的表达。以HepG2细胞作为研究对象,设置shRNA阴性对照（sh-NC）组、linc00662-shRNA干扰（sh-linc00662）组、抑制剂阴性对照（inhibitor-NC）组、miR-16-5p抑制剂（miR-16-5p inhibitor）组、siRNA阴性对照（si-NC）组、wee1-siRNA干扰（siwee1）组、linc00662-shRNA干扰联合miR-16-5p抑制剂（sh-linc00662+miR-16-5p inhibitor）组和miR-16-5p抑制剂联合wee1-siRNA干扰（miR...     

Down-regulation of LncRNA CRNDE aggravates kidney injury via increasing MiR-181a-5p in sepsis

Long non-coding RNA (lncRNA) colorectal neoplasia differentially expressed (CRNDE) is reported to be linked to inflammation and cell apoptosis. However its role in sepsis induced kidney injury remains unclear. This study aims to explore the possible mechanism of CRNDE in kidney injury induced by sepsis. In vivo urine-derived sepsis (US) rat model and in vitro LPS-induced HK-2 and HEK293 cells were established. Kidney function was measured in rats from different groups. Relative levels of tumor necrosis factor-α (TNF-α) and interleukin-1β(IL-1β) in kidney tissue were detected via Enzyme-linked immune sorbent assay (ELISA). Then we up- or down-regulated CRNDE and miRNA-181a-5p expression in the cells. The biological influence of CRNDE and miR-181a-5p on cells was studied using CCK-8 assay and Annexin V assay. Interaction between CRNDE and miR-181a-5p was determined by bioinformatics analysis, RT-PCR, and dual luciferase reporter assay. Peroxisome proliferator-activated receptor-α (PPARα) and cell apoptosis related molecules were detected by western blot. We demonstrated that CRNDE was markedly down-regulated while miR-181a-5p was significantly up-regulated in sepsis models. CRNDE interacted with miR-181a-5p, and negatively regulated its expression level. CRNDE knockdown in rats increased the urea nitrogen and serum creatinine in plasma. Knockdown of CRNDE or transfection of miR-181a-5p significantly inhibited proliferation and promoted apoptosis of HK-2 and HEK293 cells, while overexpression of CRNDE and transfection of miR-181a-5p inhibitors had opposite effects. For mechanism, miR-181a-5p directly targeted the 3′ untranslated region of PPARα, and depressed its protein level, and PPARα was regulated indirectly by CRNDE. We concluded that CRNDE protected renal cell from sepsis-induced injury via miR-181a-5p/PPARα pathway.     

山茱萸环烯醚萜苷对创伤性脑损伤模型大鼠脑内炎症反应的影响

目的：观察创伤性脑损伤模型大鼠在山菜萸环烯醚萜苷（cornus iridoid glycosides,CIG）治疗后脑组织中炎症反应尤其是炎性细胞因子的变化,以探讨CIG的脑保护作用及其机制。方法：SD大鼠灌胃给予不同剂量的CIG（30、60、120mg·kg^-1·d^-1）,连续7d;用自由落体打击（Feeney法）造成大鼠创伤性脑损伤模型,继续给药,分别于伤后24、72h取脑;用HE染色法观察大脑皮层的形态学变化,用免疫组织化学法检测炎性细胞因子TNF—α、IL-1β的表达,并对其免疫反应阳性细胞的数量和面积进行图像分析和统计学分析。结果：HE染色显示模型组大脑皮层病理形态改变严重,CIG治疗组的病理改变与模型组相比明显减轻。免疫组织化学法发现,TNF-α、IL-1β阳性细胞主要分布在挫伤灶的周围,模型组TNF-α、IL-1β表达水平明显高于假手术组,伤后24、72h都持续高表达。CIG治疗组TNF-α、IL-1β表达水平比模型组明显降低,且有一定的剂量依赖性,尤其以伤后72hCIG的抑制作用更加显著。结论：CIG可能通过抑制炎性细胞因子的表达,减轻炎症反应,从而发挥对创伤性脑损伤后的脑保护作用。