Argatroban promotes recovery of spinal cord injury by inhibiting the PAR1/JAK2/STAT3 signaling pathway

Argatroban is a synthetic thrombin inhibitor approved by U.S.Food and Drug Administration for the treatment of thrombosis.However,whether it plays a role in the repair of spinal cord injury is unknown.In this study,we established a rat model of T10 moderate spinal cord injury using an NYU Impactor ModerⅢand performed intraperitoneal injection of argatroban for 3 consecutive days.Our results showed that argatroban effectively promoted neurological function recovery after spinal cord injury and decreased thrombin expression and activity in the local injured spinal cord.RNA sequencing transcriptomic analysis revealed that the differentially expressed genes in the argatroban-treated group were enriched in the JAK2/STAT3 pathway,which is involved in astrogliosis and glial scar formation.Western blotting and immunofluorescence results showed that argatroban downregulated the expression of the thrombin receptor PAR1 in the injured spinal cord and the JAK2/STAT3 signal pathway.Argatroban also inhibited the activation and proliferation of astrocytes and reduced glial scar formation in the spinal cord.Taken together,these findings suggest that argatroban may inhibit astrogliosis by inhibiting the thrombin-mediated PAR1/JAK2/STAT3 signal pathway,thereby promoting the recovery of neurological function after spinal cord injury.

RNA结合蛋白KHSRP激活JAK1/STAT3通路促进胃贲门腺癌的生长与转移

目的探讨KHSRP靶向调控JAK1/STAT3信号轴对胃贲门腺癌细胞迁移和侵袭等恶性生物学行为的影响。方法比较胃贲门腺癌组织和癌旁组织中KHSRP的表达水平。qRT-PCR法检测胃贲门腺癌细胞系(OE-19、TE-7、BIC-1、FLO-1、SK-GT-4、BE-3)与正常胃黏膜上皮细胞系(GES-1)中KHSRP的表达差异。通过包装慢病毒载体对KHSRP进行敲降和过表达处理,分为sh-NC组、sh-KHSRP组和Vector组、KHSRP组。采用细胞计数试剂盒-8(CCK-8)、Transwell实验测定KHSRP对胃贲门腺癌细胞增殖、迁移和侵袭的影响。异种移植肿瘤模型检测敲降和过表达KHSRP在活体动物体内的作用。Western blot实验验证KHSRP靶向JAK/STAT信号通路。结果与邻近正常组织相比,KHSRP在GCA组织中的表达显著增高(P<0.05)。细胞功能实验分析显示,KHSRP过表达在体外显著促进GCA细胞增殖、迁移和侵袭(P<0.05)。在敲降KHSRP后,JAK/STAT信号通路中JAK1、STAT3磷酸化水平明显降低,过表达KHSRP后情况则反之(P<0.05)。结论KHSRP通过激活JAK1/STAT3信号轴调控胃贲门腺癌转移的恶性进程。

Metochalcone induces senescence-associated secretory phenotype via JAK2/STAT3 pathway in breast cancer

Breast and lung cancers are the leading causes of mortality and most frequently diagnosed cancers in women and men,respectively,worldwide.Although the antitumor activity of chalcones has been extensively studied,the molecular mechanisms of isoliquiritigenin analog 2',4',4-trihydroxychalcone(metochalcone;TEC)against carcinomas remain less well understood.In this study,we found that TEC inhibited cell proliferation of breast cancer BT549 cells and lung cancer A549 cells in a concentration-dependent manner.TEC induced cell cycle arrest in the S-phase,cell migration inhibition in vitro,and reduced tumor growth in vivo.Moreover,transcriptomic analysis revealed that TEC modulated the activity of the JAK2/STAT3 and P53 pathways.TEC triggered the senescence-associated secretory phenotype(SASP)by repressing the JAK2/STAT3 axis.The mechanism of metochalcone against breast cancer depended on the induction of SASP via deactivation of the JAK2/STAT3 pathway,highlighting the potential of chalcone in senescence-inducing therapy against carcinomas.

CDK8 Promotes Cell Proliferation, Migration and Invasion in Esophageal Squamous Cell Carcinoma Through JAK/ STAT3/EMT Pathway

Objective To investigate the expression of cyclin-dependent kinase 8(CDK8)in esophageal squamous cell carcinoma(ESCC)and its effect on ESCC cells,and to explore its potential molecular mechanism.Methods The expression level of CDK8 mRNA was analyzed using UALCAN database,and then the expression level of CDK8 protein in tumor tissues of ESCC patients was detected by immunohistochemistry(IHC).Esophageal cancer cell lines Kyse-30 and Kyse-150 were stably transfected with lentivirus to achieve knockdown and overexpression of CDK8.EdU proliferation assay,cell colony formation assay,cell cycle assay,cell scratch assay and invasion assay were used to explore the effect of CDK8 protein expression level on the phenotype of ESCC cells.Subsequently,the effect of CDK8 on the growth of esophageal cancer xenografts in vitro was observed by subcutaneous tumor formation assay in mice.Finally,the expression of proliferation and metastasis related proteins was detected by Western blot.Results CDK8 showed high transcription and protein expression levels in ESCC tissues compared with normal esophageal tissues.Knockdown of CDK8 expression significantly inhibited the proliferation,migration and invasion of ESCC cells.In addition,inhibition of CDK8 expression significantly affected the JAK2/STAT3 pathway and the expression of E-cadherin/N-cadherin,while overexpression of CDK8 reversed these effects.Inhibition of STAT3 pathway reversed the promoting effect of CDK8 overexpression on ESCC cell phenotype.Conclusion CDK8 is a cancer-promoting factor of ESCC,which mediates the phosphorylation of JAK2/STAT3 and epithelial-mesenchymal transition(EMT).

Exploring the mechanism of electroacupuncture at different acupoints on acute colitis rats based on JAK2/STAT3/SOCS1 signaling pathway

Objective:To investigate the mechanism of JAK2/STAT3/SOCS1 signaling pathway in electroacupuncture of different acupoints on acute colitis rats.Methods:36 SPF SD rats were randomly divided into 6 groups,with 6 rats in each group.The rat model of acute colitis was prepared by enema with glacial acetic acid solution.After the model was established,electroacupuncture was given to each acupoint group,with density wave,frequency 2Hz-50 Hz,intensity 2 mA,muscle tremor as the degree 20 min/time,1 time/day,for 3 consecutive days.Observe the general condition of rats;the pathological changes of colonic mucosa in rats were observed by HE method.The contents of serum interleukin-4(IL-4)and interleukin-8(IL-8)were detected by ELISA.Western blot and RT-PCR were used to detect the expression of JAK2,STAT3,SOCS1 protein and mRNA in rat colon tissue.Results:In contrast to the normal group,the overall condition of the model group was worse,the colonic mucosa was severely damaged,even necrotic,and the ulcer surface was obvious.The content of IL-4 in serum was obviously reduced,and the content of IL-8 was obviously go up(P<0.01).The protein content of JAK2,STAT3 and the expression of JAK2,STAT3 mRNA in colon tissue of rats were obviously go up,while the protein content of SOCS1 and the expression of SOCS1 mRNA were obviously reduced(P<0.01).In contrast to the model group,the general condition of rats in each acupoint group was significantly improved,the damage and necrosis of colonic mucosa and ulcer surface were obviously alleviated,the content of IL-4 in serum was obviously go up,and the content of IL-8 was significantly decreased(P<0.01).The protein content of JAK2,STAT3 and the expression of JAK2,STAT3 mRNA in colon tissue of rats were obviously reduced,while the protein content of SOCS1 and the expression of SOCS1 mRNA were obviously go up(P<0.05,P<0.01).Comparison of different acupoint groups,the colonic mucosal injury in the Zusanli group was significantly reduced,the content of serum IL-4 was significantly increased,and the content of IL-8 was significantly decreased(P<0.05,P<0.01).The protein content and mRNA expression of JAK2 and STAT3 in colon tissue were significantly down-regulated,while the protein content and mRNA expression of SOCS1 were significantly go up(P<0.05,P<0.01).Conclusion:Electroacupuncture at each acupoint can improve the damage of colonic mucosa and reduce the inflammatory response.The therapeutic effect of Zusanli(ST36)is better than that of Tianshu(ST25),Dachangshu(BL25)and Shangjuxu(ST37).The mechanism may be related to the regulation of JAK2/STAT3/SOCS1 signaling pathway related proteins and inflammatory cytokines IL-4 and IL-8.

Yangyin Huowei mixture alleviates chronic atrophic gastritis by inhibiting the IL-10/JAK1/STAT3 pathway

BACKGROUND The Chinese medicine Yangyin Huowei mixture(YYHWM)exhibits good clinical efficacy in the treatment of chronic atrophic gastritis(CAG),but the mechanisms underlying its activity remain unclear.AIM To investigate the therapeutic effects of YYHWM and its underlying mechanisms in a CAG rat model.METHODS Sprague-Dawley rats were allocated into control,model,vitacoenzyme,and low,medium,and high-dose YYHWM groups.CAG was induced in rats using Nmethyl-N′-nitro-N-nitrosoguanidine,ranitidine hydrochloride,hunger and satiety perturbation,and ethanol gavage.Following an 8-wk intervention period,stomach samples were taken,stained,and examined for histopathological changes.ELISA was utilized to quantify serum levels of PG-I,PG-II,G-17,IL-1β,IL-6,and TNF-α.Western blot analysis was performed to evaluate protein expression of IL-10,JAK1,and STAT3.RESULTS The model group showed gastric mucosal layer disruption and inflammatory cell infiltration.Compared with the blank control group,serum levels of PGI,PGII,and G-17 in the model group were significantly reduced(82.41±3.53 vs 38.52±1.71,23.06±0.96 vs 11.06±0.70,and 493.09±12.17 vs 225.52±17.44,P<0.01 for all),whereas those of IL-1β,IL-6,and TNF-αwere significantly increased(30.15±3.07 vs 80.98±4.47,69.05±12.72 vs 110.85±6.68,and 209.24±11.62 vs 313.37±36.77,P<0.01 for all),and the protein levels of IL-10,JAK1,and STAT3 were higher in gastric mucosal tissues(0.47±0.10 vs 1.11±0.09,0.49±0.05 vs 0.99±0.07,and 0.24±0.05 vs 1.04±0.14,P<0.01 for all).Compared with the model group,high-dose YYHWM treatment significantly improved the gastric mucosal tissue damage,increased the levels of PGI,PGII,and G-17(38.52±1.71 vs 50.41±3.53,11.06±0.70 vs 15.33±1.24,and 225.52±17.44 vs 329.22±29.11,P<0.01 for all),decreased the levels of IL-1β,IL-6,and TNF-α(80.98±4.47 vs 61.56±4.02,110.85±6.68 vs 89.20±8.48,and 313.37±36.77 vs 267.30±9.31,P<0.01 for all),and evidently decreased the protein levels of IL-10 and STAT3 in gastric mucosal tissues(1.11±0.09 vs 0.19±0.07 and 1.04±0.14 vs 0.55±0.09,P<0.01 for both).CONCLUSION YYHWM reduces the release of inflammatory factors by inhibiting the IL-10/JAK1/STAT3 pathway,alleviating gastric mucosal damage,and enhancing gastric secretory function,thereby ameliorating CAG development and cancer transformation.

Oleanolic acid inhibits colon cancer cell stemness and reverses chemoresistance by suppressing JAK2/STAT3 signaling pathway

Background:Oleanolic acid(OA),a pentacyclic triterpenoid exhibiting specific anti-cancer properties and highly effective antioxidant activity,was isolated from traditional Chinese medicinal herbs.Conversely,the OA that impacts colon cancer(CC)cells and its underlying mechanisms remain poorly understood.Methods:The cytotoxic effect of OA alone or OA-5-Fluorouracil(5-FU)combination on normal and CC cells was analyzed by methyl thiazolyl diphenyl-tetrazolium bromide(MTT).Then,the impact of OA on CC cell lines(LoVo and HT-29)proliferation and stemness were measured using colon formation and tumorsphere formation assays.Octamer-binding transcription factor 4(Oct4),Prominin-1(CD133),Nanog,and transcription factor SOX-2(SOX2)are cell stemness-related indicators whose expression was assessed usingfluorescence qPCR assay,Western blotting,and immunohistochemistry.The effect of OA on the proliferative potency of CC cells was evaluated using an in vivo model.Results:The stem-like characteristics and clone production of colon cancer cells were markedly reduced by OA alone or in combination with OA-5-FU.Moreover,OA increases the susceptibility of CC cells to 5-FU by blocking the cell stemness-related markers(CD133,Nanog,SOX2,and Oct4)expression levels both in vitro and in vivo,as well as by inactivating the activator of transcription 3(STAT3 signaling)and Janus kinase 2/signal transducer(JAK2).Conclusion:Thesefindings imply that oleanolic acid,both in vitro and in vivo,suppresses the JAK2/STAT3 pathway,which in turn reverses chemoresistance and decreases colon cancer cell stemness.Therefore,by reducing the recommended amount of 5-FU,this strategy may improve chemotherapeutic effectiveness and minimize undesired side effects.

基于JAK/STAT信号通路探讨针刺治疗脑出血机制研究进展

脑出血是一种急性脑血管病,发病率、病死率较高,发病机制十分复杂。Janus酪氨酸蛋白激酶(JAK)/信号转导及转录激活因子(STAT)信号通路在脑出血发展过程中起关键作用。针刺治疗脑出血疗效肯定,本文以JAK/STAT信号通路作为切入点,梳理近年来针刺治疗脑出血机制研究,归纳其在抑制炎性反应,减轻脑水肿,抑制细胞凋亡,促进神经、血管再生、促进神经功能重塑等方面作用,为相关研究提供参考。

真武汤加减治疗中重度变应性鼻炎的疗效及对JAK2/STAT信号通路的影响

目的:观察真武汤加减治疗中重度变应性鼻炎肾阳虚证的疗效及对JAK2/STAT信号通路的影响。方法:120例变应性鼻炎患者随机分为2组,每组60例。对照组给予糠酸莫米松联合盐酸左西替利嗪,观察组口服真武汤加减,治疗4周。比较两组患者鼻症状积分(TNSS)、圣乔治呼吸问卷(SGRQ)、中医症状、鼻腔最小横截面积(NMCA)、0~7 cm阶段鼻腔容积(NCV_(0-7))、吸气过程中鼻通气阻力(iNAR)和呼气过程中鼻通气阻力(eNAR)、血清免疫功能指标(IgE、IgG、IgA、IgM)、血清和鼻分泌液中炎性因子(EOT、CCR3、EOS、IL-17)及鼻分泌液中JAK2、STAT3、STAT4、STAT5水平。比较两组临床疗效及不良反应。结果:观察组总有效率96.3%,显著高于对照组的80.4%(P<0.05)。治疗后,与对照组比较,观察组TNSS、SGRQ、中医症状评分及iNAR、eNAR水平显著降低(P<0.05),NMCA、NCV_(0-7)、IgG、IgA、IgM水平显著升高,IgE、EOT、CCR3、EOS、IL-17、JAK2、STAT3、STAT4、STAT5水平显著降低(P<0.05)。观察组不良反应发生率(1.7%)显著低于对照组(23.2%)(P<0.05)。结论:真武汤加减可明显缓解中重度变应性鼻炎肾阳虚证患者的鼻部症状,其作用机制可能与调节JAK2/STAT信号通路有关。

JAK-STATs通路在CTGF刺激人增生性瘢痕成纤维细胞增殖分化中的作用

目的:探讨JAK-STATs是否参与CTGF刺激人增生性瘢痕成纤维细胞(human hypertrophic scar fibroblast,hHSF)增殖分化过程。方法:原代培养hHSF,将其分为①对照组:hHSF组;②CTGF刺激hHSF组。取0min、5min、10min、20min、30min、45min、60min、90min八个时相点,采用western-blot方法检测各时相点JAK1、JAK2、JAK3、TYK2、STAT1、STAT2、STAT3、STAT4、STAT5、STAT6蛋白活化(磷酸化)情况。再对筛选出的蛋白用免疫荧光化学染色和凝胶阻滞电泳(EMSA)方法进一步验证分析其表达及活化情况,以筛选出参与CTGF调控hHSF增殖和分化的JAK-STATs信号分子。结果:通过western-blot、免疫荧光化学染色和凝胶阻滞电泳(EMSA)方法筛选出JAK1、STAT1蛋白在CTGF刺激后蛋白活化程度明显增强。结论:JAK1、STAT1可能参与了CTGF调控hHSF增殖过程。这从一定程度上揭示了CTGF调控hHSF增殖分化过程的信号转导机制,从而为抑制瘢痕纤维化提供了新的研究方向,有助于更深入地调控CTGF的促纤维化作用,为hHSF及其它纤维化疾病的研究及防治提供新的思路。

香青兰总黄酮调控TMAO介导的JAK/STAT轴抗大鼠动脉粥样硬化及RAW264.7细胞炎症的研究

目的探讨香青兰总黄酮(total flavonoids of Dracocephalum Moldavica L.,TFDM)抗大鼠动脉粥样硬化(atherosclerosis,AS)及三甲胺氮氧化物(trimethylamine N-oxide,TMAO)加剧的小鼠巨噬细胞RAW264.7炎症的保护作用及其可能的作用机制。方法采用高脂饲料喂养联合腹腔注射维生素D3的方法建立SD大鼠AS模型,分为对照组、模型组、辛伐他汀组(15 mg·kg^(-1))、TFDM组(60、30、15 mg·kg^(-1)),建模同时进行给药处理,持续8周。生化检测方法检测血清总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)水平。HE染色检测主动脉组织病理变化,ELISA试剂盒检测血清中TMAO、IL-1β、IL-6及肝脏组织中TNF-α的表达,Western blot法检测主动脉中JAK、STAT、TNF-α蛋白的表达。此外,体外培养RAW264.7巨噬细胞,采用LPS+TMAO建立巨噬细胞炎症模型,TFDM(100、50、25 mg·L^(-1))进行干预。CCK-8测定细胞活力及增殖,RT-qPCR法检测细胞中TNF-α、IL-6、JAK、STAT mRNA的表达。结果TFDM可明显下调大鼠血清TC、TG、LDL-C水平及血清TMAO、IL-1β、IL-6和肝脏TNF-α的水平,减少主动脉的斑块沉积,下调主动脉中TNF-α、JAK、STAT的蛋白表达。此外,TFDM干预可明显下调TNF-α、IL-6、JAK、STAT mRNA的表达及JAK、STAT蛋白的表达。结论TFDM可降低血清中TMAO的含量,从而抑制JAK/STAT炎症信号通路,减缓炎症的发生,发挥抗AS作用。

白杨素通过JAK-STATs信号通路抑制内毒素诱导的巨噬细胞炎症反应

目的探讨白杨素对LPS诱导的RAW264.7细胞炎症的调控机制。方法分别用不同浓度(0、5、10、20、40、60、80、100、150、200μg/m L)白杨素作用RAW264.7细胞24 h后,采用CCK-8检测细胞活力值;分别用(10、30、60μg/m L)白杨素预处理RAW264.7细胞2 h后,用LPS刺激RAW264.7细胞18 h后,采用ELISA法检测炎症因子TNF-α、IL-6和MCP-1的释放水平;分别用(10、30、60μg/m L)白杨素预处理RAW264.7细胞2 h后,用LPS刺激RAW264.7细胞4 h后,运用Western blotting法检测JAK-1、JAK-2、STAT-1、STAT-3的磷酸化水平;分别用(10、30、60μg/m L)白杨素预处理RAW264.7细胞2 h后,用LPS刺激RAW264.7细胞15 min后,运用CM-H2DCFDA荧光探针检测RAW264.7细胞内活性氧簇水平;运用ROS清除剂NAC处理RAW264.7细胞,检测ROS对LPS诱导RAW264.7细胞JAK-STATs信号和炎症反应的影响;运用激光共聚焦显微镜观察转录因子STAT-1和STAT-3核转位情况。结果在白杨素浓度低于60μg/m L时,对RAW264.7细胞活力没有显著影响,因此我们选择10、30、60μg/m L白杨素作为抑制炎症作用的低、中、高剂量组;白杨素剂量依赖性地抑制LPS诱导的炎症蛋白i NOS的表达;白杨素剂量依赖性的下调LPS诱导的RAW264.7细胞中促炎因子TNF-α、IL-6和MCP-1的释放(P<0.01);白杨素抑制RAW264.7细胞中JAK-STATs信号活化并抑制STAT-1和STAT-3核转位;白杨素抑制RAW264.7细胞内ROS的产生;ROS作为上游信号介导JAK-STATs信号通路的活化。结论白杨素能有效阻断ROS介导的JAK-STATs信号活化,从而抑制LPS诱导的RAW264.7细胞炎症反应。

淫羊藿女贞子影响激素干预哮喘大鼠与炎性因子相关的pJAKs/pSTATs的研究

目的研究淫羊藿女贞子合地塞米松对哮喘大鼠肺组织中与炎性因子相关的JAKs及STATs蛋白磷酸化表达的影响。方法 SD雄性大鼠,随机分为7组,分别是正常对照组(正常组)、哮喘模型组(模型组)、地塞米松组(激素组)、淫羊藿女贞子煎剂组(煎剂组)、地塞米松合煎剂组(激素合煎剂组)、淫羊藿女贞子提取物组(提取物组)、地塞米松合提取物组(激素合提取物组)。卵蛋白(OVA)致敏,建立大鼠哮喘模型,腹腔注射地塞米松和/或灌胃淫羊藿女贞子煎剂或提取物,免疫荧光法检测肺组织JAKs(JAK3、TYK2)及STATs(STAT3、STAT5、STAT6)蛋白的磷酸化表达。结果与正常组相比,模型组大鼠肺组织p JAK3、p TYK2、p STAT3、p STAT5、p STAT6的蛋白表达均显著升高(均P<0.01);与模型组比较,各给药组p JAK3、p TYK2、p STAT3、p STAT5、p STAT6的蛋白表达均显著降低(均P<0.01);与单用激素比较,激素合煎剂或提取物组均能进一步显著降低p JAK3、p TYK2、p STAT3、p STAT6的蛋白表达。结论调节哮喘大鼠肺组织中与炎性因子相关的JAKs/STATs可能是淫羊藿女贞子煎剂及提取物协同激素治疗哮喘的作用机制之一。

基于Th1细胞功能研究中药合地塞米松对哮喘大鼠pJAKs/pSTATs的影响

目的观察中药淫羊藿女贞子煎剂及提取物配伍地塞米松对哮喘大鼠肺组织中与Th1细胞信号通路相关的JAKs及STATs蛋白磷酸化表达的影响。方法 SPF级雄性大鼠,随机分为正常对照组(A组)、哮喘模型组(B组)、地塞米松组(C组)、淫羊藿女贞子煎剂组(D组)、地塞米松合煎剂组(E组)、淫羊藿女贞子提取物组(F组)、地塞米松合提取物组(G组)。卵蛋白致敏,激发建立大鼠哮喘模型,腹腔注射地塞米松和/或灌胃淫羊藿女贞子煎剂或提取物,免疫荧光法检测肺组织JAKs(JAK1、JAK2)及STATs(STAT1、STAT2、STAT4)蛋白的磷酸化表达。结果与A组比较,B组大鼠肺组织pJAK1、pSTAT1、pSTAT2蛋白表达均显著升高(均P<0.01),pJAK2、pSTAT4蛋白表达显著降低(均P<0.01);与B组比较,各给药组pJAK1、pSTAT1、pSTAT2蛋白表达显著降低(P<0.01或P<0.05),pJAK2、pSTAT4蛋白表达显著升高(均P<0.01);与C组比较,E组、G组能pJAK1、pSTAT1、pSTAT2的蛋白表达显著降低(P<0.01或P<0.05),pJAK2、pSTAT2的蛋白表达显著升高(P<0.01或P<0.05)。与单用地塞米松比较,地塞米松合煎剂或提取物组能显著性调整pJAK1、pJAK2、PSTAT1、pSTAT2、pSTAT4蛋白的表达。结论调节哮喘大鼠肺组织中与Th1细胞信号通路相关的JAKs/STATs可能是淫羊藿女贞子煎剂及提取物协同激素治疗哮喘的作用机制之一。

类风湿关节炎的JAK/STAT信号通路文献计量分析研究

目的通过对近十年Janus激酶(Janus kinase,JAK)/信号转导和转录激活因子(signal transducer and activator of transcription,STAT)信号通路对类风湿关节炎作用的文献进行多软件可视化分析,总结该领域发展趋势和研究热点,为研究者提供新的方向和思路,促进该领域创新性发展。方法收集Web of Science Core Collection数据库2013至2023年JAK/STAT信号通路在类风湿关节炎中的相关文献。利用CiteSpace和VOSviewer软件对检索到的354篇文章的发文量、国家、作者、关键词进行分析。结果该领域发文量持续增加,根据作者研究方向、高频词的呈现及对前言和热点的关注,提示该领域聚焦于基因表达、免疫机制、炎症机制、途径抑制剂、药物治疗等。未来研究将围绕通路抑制剂、抗风湿药物的安全性、机制、对照试验等展开。结论JAK/STAT信号通路对类风湿关节炎影响的研究在过去、现在乃至未来关注度高,研究价值大。各团队对该领域的研究存在差异,区域发展不平衡,提示应加强合作与交流、聚焦国际前沿、开展更多高质量研究,以推动该领域的发展和进步,为临床提供依据。

JAK/STATs通路与肥胖发病机制的研究进展

瘦素(leptin)是一种由肥胖基因(obese gene,ob基因)编码、由白色脂肪组织合成和分泌的蛋白质,与肥胖的发病密切相关。leptin主要通过Janus激酶/信号转导及转录激活子通路(Janus kinase/signal transducer and activator of transcription pathway,JAK/STATs通路)参与体脂代谢、机体摄食,能够有效抑制肥胖的产生。然而近来研究发现在肥胖个体中普遍存在着leptin抵抗、血液中高leptin表达;leptin并不能发挥体脂调控作用。其失活机制还不是十分清楚,研究表明JAK/STATs通路异常与机体内leptin失活存在密切关系。本文就肥胖与JAK/STATs通路的关系进行综述。

HYOU1在糖尿病施万细胞凋亡中的作用及对JAK-STAT通路的影响研究

目的探讨内质网分子伴侣复合物缺氧上调基因1(hypoxia up-regulated 1,HYOU1)对糖尿病施万细胞凋亡的影响及其机制。方法将对数生长期的施万细胞RSC96使用高糖培养基构建糖尿病周围神经病变细胞模型,并转染过表达HYOU1的质粒。利用RT-qPCR、Western blot检测HYOU1在RSC96细胞株的表达情况;利用CCK8、荧光显微镜、透射电镜和流式细胞术等技术检测HYOU1对RSC96细胞凋亡的影响;利用Western blot检测HYOU1对凋亡相关蛋白的影响,同时检测JAK-STAT信号通路相关蛋白,判断其对该通路的影响。结果RT-qPCR和Western blot实验结果显示,过表达HYOU1的RSC96细胞株成功构建。CCK8、荧光显微镜、透射电镜和流式细胞术结果表明,过表达HYOU1后,细胞活力显著升高,细胞凋亡数量显著减少(P<0.05)。Western blot实验结果表明,过表达HYOU1后,抗凋亡因子显著增加,促凋亡因子显著减弱,同时抑制了JAK-STAT通路的激活(P<0.05)。结论HYOU1可通过抑制JAK-STAT通路从而影响高糖诱导的RSC96细胞的抑凋亡作用。

基于Hepcidin和JAK2/STAT3信号通路探讨通痹颗粒 对胶原诱导性关节炎大鼠的影响

目的研究通痹颗粒对胶原诱导性关节炎(collagen-induced arthritis,CIA)大鼠铁调素(hepcidin,Hepc)、Janus激酶(janus kinase,JAK)2/信号转导子和转录激活子(signal transduction and activator of transcription,STAT)3信号通路的影响。方法选取36只雌性SD大鼠随机分成空白组、模型组、阳性对照组和通痹颗粒低、中、高剂量组,每组6只。空白组不予处理,其余组用牛Ⅱ型胶原建立CIA模型。造模完成后,空白组、模型组予生理盐水灌胃,其余各组分别以巴瑞替尼片和低、中、高剂量通痹颗粒灌胃。每天1次,连续4周。HE染色行滑膜组织病理学观察;酶联免疫吸附法测定血清Hepc、白细胞介素6(interleukin 6,IL-6)水平;逆转录-聚合酶链反应法测定滑膜中JAK2、STAT3、细胞信号因子传导抑制体(suppressor of cytokine signaling,SOCS)1、SOCS3的mRNA相对表达量;Western blot法检测滑膜中JAK2、p-JAK2、STAT3、p-STAT3、SOCS1、SOCS3的蛋白表达量。结果模型组见滑膜上皮结构缺损,滑膜重度增生,排列紊乱,并有大量炎症细胞浸润和多个血管翳形成;各给药组滑膜炎症均有所减轻,阳性对照组优于通痹颗粒高剂量组,通痹颗粒中、高剂量组优于低剂量组。与模型组相比,各给药组关节炎指数评分、血清Hepc和IL-6水平均显著降低(P<0.01);与阳性对照组相比,通痹颗粒中、低剂量组关节炎指数评分、血清Hepc和IL-6水平均升高(P<0.05)。与模型组比较,阳性对照组和通痹颗粒低、中、高剂量组JAK2、STAT3 mRNA和蛋白以及p-JAK2、p-STAT3的蛋白表达量均降低(P<0.05),而通路抑制因子SOCS1、SOCS3 mRNA和蛋白的表达均升高(P<0.05);与阳性对照组比较,通痹颗粒各剂量组JAK2、STAT3 mRNA和蛋白以及p-JAK2、p-STAT3的蛋白表达量均升高(P<0.05),而SOCS1、SOCS3 mRNA和蛋白的表达均降低(P<0.05)。结论通痹颗粒能够改善CIA大鼠滑膜炎症,其机制可能与抑制JAK2/STAT3信号通路而减少Hepc的表达有关。

静态磁场通过激活FGFR1/JAK2/STAT3信号通路促进皮肤成纤维细胞的增殖活性和迁移表型

目的:通过体外实验探讨静态磁场(SMF)对皮肤成纤维细胞增殖活性和迁移表型的调控作用与潜在机制。方法:将人皮肤成纤维细胞(HSFs)分为5组,包括对照组、SMF组、SMF+阿魏酸组、SMF+芦可替尼组、SMF+Stattic组。对照组为正常培养的HSFs;SMF组的HSFs细胞暴露于1mT的SMF中。其余三组分别将FGFR1、JAK2、STAT3的抑制剂(3μmoL/L阿魏酸、3nmoL/L芦可替尼、20μmoL/L的Stattic)与HSFs一起预培养,并暴露于1mT的SMF中,所有组均处理24h。用细胞计数试剂盒-8(CCK-8)分析细胞的增殖活性。用ELISA试剂盒法检测人类B细胞淋巴瘤2相关X蛋白(BAX)的水平。用Western blot检测凋亡标志蛋白cleaved-caspase3及FGFR1、JAK2、STAT3、磷酸化的(p)-FGFR1、p-JAK2、p-STAT3的表达以及细胞迁移相关表型高迁移率组蛋白1(HMGB1)、波形蛋白(vimentin)、血管内皮生长因子A(VEGFA)、基质金属蛋白酶-9(MMP-9)、MMP-2的表达。结果:与对照组比,SMF组的细胞增殖活性增加,BAX的水平减少,cleaved-caspase3的蛋白表达水平下调,p-FGFR1、p-JAK2、p-STAT3、HMGB1、vimentin、VEGFA、MMP-9、MMP-2的表达水平均显著上调(均P<0.05)。与SMF组比,SMF+阿魏酸组的细胞增殖活性降低,BAX的水平增加,cleaved-caspase3的蛋白表达水平上调,而p-FGFR1、p-JAK2、p-STAT3、HMGB1、vimentin、VEGFA、MMP-9、MMP-2的表达均显著下调(均P<0.05)。与SMF组比,SMF+芦可替尼组的细胞增殖活性降低,BAX的水平增加,cleaved-caspase3的蛋白表达水平上调,JAK2、p-JAK2、p-STAT3、HMGB1、vimentin、VEGFA、MMP-9、MMP-2的表达水平均显著下调(均P<0.05)。与SMF组比,SMF+Stattic组的细胞增殖活性降低,BAX的水平增加,cleaved-caspase3的蛋白表达水平上调,STAT3、p-STAT3、HMGB1、vimentin、VEGFA、MMP-9、MMP-2的表达水平均显著下调(均P<0.05)。结论:SMF通过激活FGFR1/JAK2/STAT3信号通路促进皮肤成纤维细胞的增殖活性和迁移表型。

纤维粘连蛋白靶向JAK/STAT3信号通路调控粘连性肠梗阻的机制

目的:探究纤维粘连蛋白(FN)靶向JAK/STAT3信号通路调控粘连性肠梗阻的作用机制。方法:选取2019年1月—2020年12月就诊行肠切除手术的粘连性肠梗阻患者65例(观察组),同期行腹股沟疝手术患者65例(对照组),取患者肠组织及术前血液样本,采用qRT-PCR、Western blot及免疫组织化学实验检测肠组织样本中FN、STAT3、p-STAT3基因及蛋白表达,采用酶联免疫吸附实验(ELISA)检测血清样本中FN表达。体外培养人肠上皮细胞系HIEC-6,采用慢病毒转染抑制细胞FN表达,采用CCK8、Transwell迁移实验观察FN对细胞增殖及分化的影响,同时采用qRT-PCR、Western Blot实验检测FN对细胞STAT3、p-STAT3表达的影响。结果:与对照组比较,观察组肠组织中FN mRNA及蛋白表达明显较高(P<0.05),STAT3、p-STAT3 mRNA及蛋白表达则明显较低(P<0.05),且观察组血清中分泌型FN含量也明显较高(P<0.05)。体外实验显示,与NC siRNA组HIEC-6细胞比较,LV-FN siRNA组HIEC-6细胞在48、72、96、120 h的增殖率均明显较低(P<0.05),细胞迁移能力也明显较低(P<0.05),其FN mRNA及蛋白表达明显较低(P<0.05),STAT3、p-STAT3 mRNA及蛋白则明显较高(P<0.05)。结论:纤维粘连蛋白在粘连性肠梗阻患者肠组织及血清中呈明显高表达,可通过JAK/STAT3信号通路的异常激活影响细胞的增殖和迁移,引起病变肠段发病。