黄芪甲苷通过抑制JAK2/STAT3信号通路减轻重症急性胰腺炎大鼠肝损伤

目的:探讨黄芪甲苷对重症急性胰腺炎(SAP)大鼠相关急性肝损伤的影响及作用机理。方法:将96只健康SD大鼠随机分成假手术组、模型组(SAP组)、黄芪甲苷治疗组和AG490干预组,每组24只。对大鼠采用逆行胰胆管注射5%牛磺胆酸钠(1 m L/kg)建立SAP模型。黄芪甲苷治疗组和AG490干预组大鼠于造模前2 h分别腹腔注射20 mg/kg黄芪甲苷和8.0 mg/kg AG490,假手术组和模型组各自注射对应量的0.9%生理盐水。处理结束后每组分别于12 h、18 h和24 h各组随机取8只大鼠检测其腹水量,下腔静脉穿刺采血检测血淀粉酶(AMY)、丙氨酸氨基转移酶(ALT)和天冬氨酸氨基转移酶(AST)水平,酶联免疫吸附(ELISA)法检测血清中TNF-α、IL-6和IL-1β水平。HE染色观察各组大鼠肝脏组织病理变化。Western blot检测各组大鼠肝脏组织中p-JAK2和p-STAT3的蛋白水平。结果:各时点模型组大鼠腹水量和血清中AMY、ALT、AST以及IL-6、TNF-α、IL-1β水平明显高于假手术组,黄芪甲苷和AG490干预组大鼠这些指标明显低于模型组。同时,模型组大鼠与假手术组相比,p-JAK2和p-STAT3的蛋白水平明显上调。黄芪甲苷和AG490预处理则明显改善大鼠肝损伤,并抑制JAK2和STAT3的磷酸化水平。结论:黄芪甲苷能够通过抑制JAK2/STAT3信号通路的活化从而减轻重症急性胰腺炎大鼠急性肝损伤。     

鸢尾素抑制JAK/STAT3通路促进炎症状态下的血管生成

目的　研究急性炎症状态下鸢尾素对人脐静脉内皮细胞（human umbilical vein endothelial cell,HUVEC）血管生成的影响及其机制。 方法　通过CCK-8检测不同浓度（0.1、1.0、5.0、10.0、20.0 ng/mL）的鸢尾素对HUVEC增殖的影响;用脂多糖诱导HUVEC急性炎症状态,通过划痕和成管实验,研究鸢尾素对细胞迁移及管样形成的影响,通过RT-PCR研究相关细胞因子IL-1β、IL-6、TNF-α、PDGF-BB的基因表达;Western blot检测JAK／STAT3信号通路中关键蛋白Erk1／2、Jak、Stat3的表达。 结果　各浓度的重组鸢尾素均不影响HUVEC的增殖;在急性炎症状态下,鸢尾素可以促进HUVEC细胞迁移和管样形成,并且抑制HUVEC炎症因子IL-1β、IL-6、TNF-α基因的表达,增加组织修复相关因子PDGF-BB的基因表达;鸢尾素抑制LPS诱导的JAK／STAT3通路激活。 结论　鸢尾素可以抑制JAK／STAT3信号通路,缓解LPS诱导的HUVEC急性炎症状态,促进血管新生。     

牡荆素通过调节JAK2/STAT3/SOCS3通路改善哮喘幼鼠肺部炎症

目的 探究牡荆素对哮喘幼鼠的作用及其可能的作用机制。方法 卵清蛋白联合氢氧化铝制备BALB/c幼鼠哮喘模型,正常对照组、哮喘组、牡荆素组和地塞米松组各纳入9只BALB/c幼鼠。无创肺功能检测系统记录气道反应性;H-E染色检测肺组织病理学变化;PAS染色检测杯状细胞增生;收集肺泡灌洗液（BALF）并进行炎症细胞计数;ELISA试剂盒检测IgE、IL-4、IL-6、IL-13、IL-17和TNF-α水平;Western blot检测Bcl-2、Bax、c-caspase3、p-JAK2、JAK2、p-STAT3、STAT3和SOCS3蛋白表达。结果 与正常对照组相比,哮喘组幼鼠气道阻力、炎症评分和杯状细胞增生评分明显升高（P<0.05）,BALF中炎症细胞数量显著上升（P<0.05）,IgE、IL-4、IL-6、IL-13、IL-17和TNF-α水平明显升高（P<0.05）,Bax、c-caspase3、p-JAK2/JAK2、p-STAT3/STAT3和SOCS3蛋白表达水平显著升高（P<0.05）,而Bcl-2蛋白表达水平显著降低（P<0.05）;与哮喘组...     

茯苓酸通过调节JAK2/STAT3/SOCS3信号通路减轻急性心肌梗死大鼠的心肌纤维化

目的 初步探讨茯苓酸(PA)通过调节Janus蛋白酪氨酸激酶2(JAK2)/信号转导与转录激活子3(STAT3)/细胞因子信号转导抑制因子3(SOCS3)信号通路对急性心肌梗死(AMI)大鼠心肌纤维化的影响。方法 采用左冠状动脉前降支结扎法构建AMI模型,造模成功大鼠随机分为Model组、PA低、中、高剂量组(1、5、10mg/kg)、激活剂组(10mg/kg PA+1mg/kg colivelin),随机选取12只作Sham组只穿线不结扎,各组灌胃和腹腔注射相对应的药物,每天1次,连续4周。超声心动图检测大鼠心功能;苏木精和伊红(HE)及马森三色(Masson)染色观察心肌组织病理损伤及纤维化程度;免疫组化染色测定心肌I型胶原蛋白(COL-I)、III型胶原蛋白(COL-III)的表达;酶联免疫吸附实验(ELISA)检测大鼠心肌组织白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)水平,试剂盒测定羟脯氨酸(HYP)含量;Western blot检测转化生长因子-β1(TGF-β1)、JAK2/STAT3/SOCS3信号通路蛋白表达。结果 与Sham组比较,Model组大鼠LV...     

威灵仙总皂苷抑制佐剂性关节炎大鼠JAK2/STAT3信号通路

目的研究威灵仙总皂苷(TSC)对佐剂性关节炎(AA)大鼠的JAK2/STAT3信号通路的作用机制。方法雄性SD大鼠60只,随机分为6组,每组10只。除正常组外,采用Freund完全佐剂诱导AA大鼠模型。造模第12天,灌胃给予相应药物,1次/d,连续16 d,观察药物对AA大鼠体质量及足肿胀度的影响;取固定部位踝关节组织,HE染色观察病理学改变;实时荧光定量PCR法测定滑膜细胞中Janus激酶2(JAK2)、信号转导子和转录激活子3(STAT3)mRNA表达;Western blot法检测磷酸化JAK2及非磷酸化JAK2(p-JAK2、JAK2)、磷酸化STAT3及非磷酸化STAT3(p-STAT3、STAT3)的蛋白表达。结果 TSC可有效缓解AA大鼠体质量减轻及明显抑制AA大鼠足肿胀,明显改变炎细胞浸润,减少血管翳生成,减轻组织增生,有效抑制JAK2、STAT3 mRNA表达及降低p-JAK2/JAK2、p-STAT3/STAT3的相对表达。结论 TSC降低AA大鼠JAK2、STAT3 mRNA表达并抑制p-JAK2/JAK2、p-STAT3/STAT3相对表达,抑制JAK2/STAT3信号通路。     

基于JAK2/STAT3信号通路探讨中药单体治疗肝癌的研究

众多信号通路参与肝癌的形成、发展过程,其中JAK2/STAT3信号通路在调控肝癌细胞的生长、增殖、凋亡、分化过程中发挥着极其重要的作用。而中药单体具有抑制细胞增殖、诱导细胞的凋亡和自噬、抑制上皮间质化、调节细胞周期和免疫、逆转耐药性、增强化疗效果、使细胞衰老和失巢凋亡发挥抗肝癌作用。本文就中药单体通过调控JAK2/STAT3信号通路在治疗肝癌的研究进展作一综述,以期为疾病的治疗提供参考。     

JAK2/STAT3通路参与大鼠坐骨神经结扎神经病理性疼痛模型

目的结扎大鼠双侧坐骨神经复制bCCI模型,观察JAK2/STAT3通路的激活情况。方法 60只体质量180~200 g SD雌性大鼠随机分为3组,bCCI组,sham组及Nave组。分别于bCCI手术术前1 d,术后3、7、14和21d取腰段脊髓背角,并进行RT-PCR及Western blot观察通路中主要因子的mRNA水平及蛋白水平的变化。结果 bCCI组大鼠对机械、热刺激及冷丙酮刺激的痛觉阈值明显降低。与sham组及Nave相比,bCCI组STAT3、SOCS3、JAK2及IL-6 mRNA水平显著升高,且3组在不同时间点具有差异(P0.05)。与sham组及Nave相比,bCCI组P-STAT3、JAK2和SOCS3蛋白水平升高。结论大鼠bCCI神经病理性疼痛模型JAK2/STAT3通路激活。     

褪黑素对心力衰竭大鼠JAK1/STAT3信号通路的调节作用

目的 探讨褪黑素对心力衰竭(HF)大鼠JAK1/STAT3信号通路的影响。方法 将SD雄性大鼠通过左前降支冠状动脉结扎术建立HF模型并随机分为模型组和褪黑素低剂量组(5 mg/kg)、中剂量组(10 mg/kg)、高剂量组(20 mg/kg),将正常大鼠作为对照组,20只/组。对照组和模型组灌胃给药生理盐水,所有组别连续灌胃4周。采用无创尾动脉血压测量分析系统检测各组大鼠给药后的血压及心率;采用彩色多普勒超声诊断仪检测大鼠左心室舒张末期容积(left ventricular end diastolic volume,LVEDV)、左心室收缩末期容积(left ventricular end systolic volume, LVESV)、心室舒张末期室间隔厚度(IvSd)、左心室舒张末期直径(left ventricular end diastolic diameter, LVIDd)、左心室收缩末期直径(left ventricular end systolic diameter, LVID)、舒张早期二尖瓣血流速度/舒张晚期二尖瓣血流速度比值(E/A)、射血分数(ejection ...     

依达拉奉通过抑制JAK2/STAT3信号通路减少大鼠急性脊髓损伤后的细胞凋亡

目的 研究依达拉奉对大鼠急性脊髓损伤后JAK2/STAT3信号通路活化的影响,探讨依达拉奉保护神经的相关机制。方法 96只成年雄性SD大鼠随机分为假手术组（Sham组）,脊髓损伤组（SCI组）,3mg/kg依达拉奉组（SCI+EDA组）和15mg/kg酪氨酸激酶抑制剂组（SCI+AG490组）,每组24只。分别在各组术后6,12,24和72h取材,利用TUNEL法检测细胞凋亡水平;Western blot法检测p-JAK2、p-STAT3蛋白表达变化;免疫组化法检测各组脊髓组织Caspase-3阳性细胞表达。结果 与Sham组相比,损伤脊髓的各组中脊髓组织中凋亡细胞数量明显增加,p-JAK2、p-STAT3蛋白表达水平明显增高,Caspase-3阳性细胞表达水平明显增加。与SCI组对比,SCI+EDA组与SCI+AG490组脊髓组织中凋亡细胞数量明显减少,p-JAK2、p-STAT3蛋白表达水平明显降低,Caspase-3阳性细胞表达水平明显下降（P<0.05）。SCI+EDA组与SCI+AG490组相比较无统计学差异。结论 依达拉奉能够抑制JAK2/STAT3信号通路的激活,降...     

Xyloketal B通过调控JAK2/STAT3信号通路减轻大鼠癫痫后脑损伤

目的:探讨海洋天然产物xyloketal B(Xyl-B)能否通过调控JAK2/STAT3信号通路保护发育期大鼠癫痫后脑损伤.方法:32只20日龄雄性SD大鼠随机分为4组:对照control组、红藻氨酸(KA)组、KA+Xyl-B(10 mg/kg)组及KA+Xyl-B(20 mg/kg)组,通过腹腔注射KA制作大鼠癫...     

JAK/STAT3信号通路调控肿瘤及其相关生物功能的研究进展

JAK/STAT3信号通路是细胞信号通路中重要的信号传导通路之一,通过影响下游多种效应分子的活化状态,对细胞凋亡和增殖起着关键的作用,并且还诱导胚胎发育、肝脏再生、糖酵解和炎性反应、上皮间质转化和血管再生等一系列生物发生过程,与人类肿瘤的发生发展密切相关。     

长托宁抑制JAK2/STAT3信号通路缓解脑缺血再灌注大鼠脑内炎症反应

目的 探讨长托宁对脑缺血性再灌注大鼠脑损伤的保护作用及对JAK2/STAT3信号通路的影响.方法 采用线栓法制备脑缺血性再灌注(I/R)大鼠模型,随机分为假手术组(sham)、脑缺血再灌注模型组(I/R)、长托宁治疗组(PH);对各组大鼠的神经功能障碍进行评分;检测各组大鼠脑梗死体积以及脑含水量;Nissl染色各组大鼠...     

Curcumin inhibits oral squamous cell carcinoma proliferation and invasion via EGFR signaling pathways

Epidermal growth factor receptor (EGFR) is an effective molecular target of anti-cancer therapies. Curcumin is known to inhibit growth, invasion and metastasis by downregulating EGFR expression in some cancer cells. However, the mechanism underlying the effect of curcumin in human oral squamous cell carcinoma (OSCC) remains unclear. In this study, we investigated the efficacy of curcumin on proliferation and invasion in SCC-25 cell line. We also explored the effect of curcumin on the activition of EGFR and its downstream signaling molecules Akt, ERK1/2 and STAT3. Furthermore, we examined the inhibition effect of curcumin on EGF-induced EGFR phosphorylation and SCC-25 cells invasion. Our results showed that curcumin inhibited SCC-25 cells proliferation and induced G2/M phase arrest in a dose-dependent manner. Curcumin also inhibited SCC-25 cells invasion and downregulated MMP-2, MMP-9, uPA and uPAR expression. We further revealed that curcumin regulated the p-EGFR and EGFR downstream signaling molecules including Akt, ERK1/2 and STAT3. Finally, our data showed that crucumin reduced the EGF-induced phosphorylation of EGFR and suppressed EGF-triggered SCC-25 cells invasion. Taken together, our results suggest that curcumin reduced SCC-25 cells proliferation and invasion through inhibiting the phosphorylation of EGFR and EGFR downstream signaling molecules Akt, ERK1/2 and STAT3.     

miR-135a inhibits airway inflammatory response in asthmatic mice via regulating JAK/STAT signaling pathway

The objective of this study was to investigate the inhibitory effect of miR-135a in regulating JAK/STAT signaling pathway on airway inflammation in asthmatic mice. An asthma model was established by sensitization and stimulation with ovalbumin (OVA), and the corresponding drug intervention was given from the day of stimulation by means of nasal drops. Airway hyperresponsiveness was tested. The content of miR-135a in the lung tissue of mice was detected by RT-PCR. The pathological changes of lung tissue were evaluated by HE staining. Tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-5, and eotaxin in bronchoalveolar lavage fluid (BALF) and lung tissue were detected by ELISA and immunohistochemistry, respectively. The expression of JAK/STAT signaling pathway-related protein in lung tissue was detected by western blot. To further validate the effect of miR-135a overexpression on the JAK/STAT signaling pathway, pathway activators and inhibitors were added. Compared with the OVA group, the airway hyperresponsiveness of the mice was significantly decreased after treatment with the miR-135a agonist. The expression of miR-135a was significantly increased in the lung tissue and the pathological changes of the lung tissue were alleviated. The contents of TNF-α, IL-6, IL-5, and eotaxin in BALF and lung tissues were decreased. The expression of JAK/STAT signaling pathway-related proteins p-JAK3/JAK3, p-STAT1/STAT1, and p-STAT3/STAT3 were significantly reduced in lung tissue (P<0.05). Addition of JAK inhibitor AG490 reduced airway inflammation in asthmatic mice. miR-135a agonists inhibit airway inflammation in asthmatic mice by regulating the JAK/STAT signaling pathway.     

雷帕霉素对食管鳞癌细胞裸鼠移植瘤生长及mTOR/4EBP1信号通路的影响

 目的 体内观察雷帕霉素对食管鳞癌细胞生长及mTOR/4EBP1信号通路的影响。方法 给BALB/c-nude小鼠皮下注射食管鳞癌细胞株（EC9706）,建立移植瘤模型,用雷帕霉素及顺铂对肿瘤进行治疗;用RT-PCR及Western blot等观察细胞形态及信号通路中各因子的变化。结果 与对照组相比,雷帕霉素对肿瘤生长具有显著抑制作用（P<0.05）,联合顺铂处理组的抑瘤作用更明显;雷帕霉素在体内降低了mTOR和p-4EBP1的表达,并使4EBP1的表达水平升高。结论 雷帕霉素在体内能明显抑制食管鳞癌细胞EC9706裸鼠移植瘤的生长并抑制mTOR/4EBP1信号通路的活性。     

干扰HDAC1通过调控STAT3信号通路影响皮肤鳞癌细胞凋亡

目的:探讨干扰组蛋白去乙酰化酶1(HDAC1)对皮肤鳞癌细胞凋亡的影响。方法:皮肤鳞癌细胞A431分别转染HDAC1小干扰RNA(HDAC1 si RNA)和小干扰RNA阴性对照(si RNA NC),RT-PCR和Western blot检测转染后细胞中HDAC1的表达水平,MTT检测细胞活力,流式细胞术检测细胞凋亡,Western blot检测信号转导及转录激活因子3(STAT3)、磷酸化STAT3(p-STAT3)和cleaved caspase-3的蛋白水平。同时用STAT3信号通路抑制剂作用于转染HDAC1 si RNA的A431细胞,MTT法检测细胞活力,流式细胞术检测细胞凋亡,Western blot检测STAT3、p-STAT3和cleaved caspase-3的蛋白水平。结果:HDAC1 si RNA能够抑制A431细胞中HDAC1的m RNA和蛋白表达。干扰HDAC1表达后细胞活力和细胞中p-STAT3水平下降,而细胞凋亡率和细胞中cleaved caspase-3水平升高。STAT3信号通路抑制剂作用后,转染HDAC1 si RNA的A431细胞活力及p-STAT3水平下降,细胞凋亡率及细胞中cleaved caspase-3水平升高。结论:干扰HDAC1表达可能通过调控STAT3信号通路抑制皮肤鳞癌细胞活力,促进皮肤鳞癌细胞凋亡。     

Anticancer effect of salidroside on colon cancer through inhibiting JAK2/STAT3 signaling pathway

Salidroside is considered to have anti-tumor properties. We investigate its effects on colon carcinoma SW1116 cells. Cell viability was assessed by CCK-8. Propidium iodide (PI) staining was used to determine the cell cycle by flow cytometry. The migration and invasion were detected by Transwell. Western blot was used to detect the expression of STAT3 signal related proteins. As the result, high concentrations of salidroside (10, 20. 50 μg/ml) significantly inhibited proliferation of SW1116 cells in a parallelly, cell cycle arrest was increased at the G0/G1 phase after salidroside treatment. Furthermore, salidroside inhibited migration and invasion of SW1116 cells. Salidroside treatment decreased proteins expression of phosphorylation levels in JAK2/STAT3 signaling, while MMP-2 and MMP-9 proteins levels were decreased and protein expression of VEGF and VEGFR-2 were down-regulated. In Conclusion, salidroside inhibited proliferation, decreased the migration and invasion of SW1116 cells in JAK2/STAT3-dependent pathway, the specific mechanisms need further study.