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.

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.

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.

黄芪-莪术对C5a介导JAK2/STAT3通路调控Lewis肺癌小鼠Th17/Treg细胞平衡影响的实验研究

目的探讨黄芪-莪术影响C5a介导JAK2/STAT3通路调控肿瘤微环境中Th17/Treg细胞平衡,从而阐明其在此途径抑制肿瘤进展的相关机制。方法40只雄性C57BL/6小鼠按随机数字表法分为空白对照组、模型对照组、中药干预组、阳性对照药(PMX53)组,每组各10只。腋下接种Lewis细胞建立肺癌小鼠模型,于接种后第3天开始,中药干预组按8.2 g/kg剂量给予中药浓煎液灌胃,模型对照组和PMX53组予等容积灭菌双蒸水灌胃,连续14 d;PMX53组分别于第3、6、9、12、15天按1mg/kg剂量给予腹腔注射PMX53,模型对照组和中药干预组同时腹腔注射等容PBS溶液。每2 d测算各组小鼠肿瘤体积、绘制肿瘤生长曲线;于第15天处死,剖取瘤块,ELISA法检测血清C5a、IL6、IL-10、IL-17、TGF-β等因子水平,流式细胞术检测并计算外周血和肿瘤组织中Th17/Treg细胞比例,Western Blot和Real-time PCR法检测肿瘤组织中JAK2/STAT3信号通路相关蛋白及mRNA表达。结果与模型对照组比较,中药干预组和PMX53组肿瘤生长较缓慢,补体C5a、JAK2和STAT3蛋白及mRNA水平、p-JAK2/JAK2、p-STAT3/STAT3比值、Treg占比均降低,SOCS3蛋白及mRNA水平、Th17/Treg比例增高,差异有统计学意义(P<0.05)。结论黄芪-莪术可降低补体C5a进而抑制JAK2/STAT3通路活化,并调节肿瘤微环境中Th17/Treg平衡达到抑制肿瘤生长的作用。

Traditional Chinese medicine Pien-Tze-Huang ameliorates LPS-induced sepsis through bile acid-mediated activation of TGR5-STAT3-A20 signalling

Pien Tze Huang(PZH),a class-1 nationally protected traditional Chinese medicine(TCM),has been used to treat liver diseases such as hepatitis;however,the effect of PZH on the progression of sepsis is unknown.Here,we reported that PZH attenuated lipopolysaccharide(LPS)-induced sepsis in mice and reduced LPS-induced production of proinflammatory cytokines in macrophages by inhibiting the activation of mitogen-activated protein kinase(MAPK)and nuclear factor-kappa B(NF-κB)signalling.Mechanistically,PZH stimulated signal transducer and activator of transcription 3(STAT3)phosphorylation to induce the expression of A20,which could inhibit the activation of NF-κB and MAPK signalling.Knockdown of the bile acid(BA)receptor G protein-coupled bile acid receptor 1(TGR5)in macrophages abolished the effects of PZH on STAT3 phosphorylation and A20 induction,as well as the LPS-induced inflammatory response,suggesting that BAs in PZH may mediate its anti-inflammatory effects by activating TGR5.Consistently,deprivation of BAs in PZH by cholestyramine resin reduced the effects of PZH on the expression of phosphorylated-STAT3 and A20,the activation of NF-κB and MAPK signalling,and the production of proinflammatory cytokines,whereas the addition of BAs to cholestyramine resin-treated PZH partially restored the inhibitory effects on the production of proinflammatory cytokines.Overall,our study identifies BAs as the effective components in PZH that activate TGR5-STAT3-A20 signalling to ameliorate LPS-induced sepsis.

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.

Mechanism of Yanghe Pingchaun granules on airway remodeling in asthmatic rats based on IL-6/JAK2/STAT3 signaling axis

Objective: To investigate the effects of Yanghe Pingchuan Granules on airway remodeling in asthmatic rats, and to explore the mechanism of Interleukin-6/Janus kinase 2/ Signal transducing activator of transcription 3(IL-6/JAK2/STAT3) signal axis. Methods: We separated 42 healthy male SD rats into two groups, a control group (7) and a model group (35).The model group was sensitized with a combination of ovalbumin (OVA) and aluminum hydroxide for 2 weeks, while the control group was given an equal amount of physiological saline.After 2 weeks, the modeling group was randomly divided into Model group, Yanghe Pingchuan Granules high, medium and low dose groups and Dexamethasone group, each group consisted of 7 animals. After 4 weeks, OVA atomization and gavage were used for stimulation and treatment. Yanghe Pingchuan Granules high, middle and low groups were given 15.48, 7.74, 3.87 g∙kg-1 Yanghe Pingchuan Granules daily, dexamethasone group was given 0.0625 mg∙kg-1 dexamethasone daily, and the other groups were given the same amount of normal saline. HE, PAS and Masson staining were used to observe the lung histopathological changes in rats. The levels of interleukin-6, IL-23 and IL-17A were detected by ELISA. The expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 in lung tissues were detected by Western blot. Real-time quantitative polymerase chain reaction (qRT-PCR) was used to detect the mRNA expression levels of IL-6, JAK2 and STAT3 in rat lung tissue. Results: The lung tissue structure of the model group was severely damaged compared to the control group, accompanied by a great many of inflammatory cell infiltration, goblet cell hyperplasia, subepithelial collagen fiber deposition and airway epithelial thickening were more obvious. The expressions of IL-6, IL- 23 and IL-17A in serum were significantly increased (P<0.01), the protein expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 and the mRNA expression levels of IL-6, JAK2 and STAT3 in lung tissue were significantly increased (P<0.01);Compared with the model group, inflammatory cell infiltration, goblet cell proliferation, subepithelial collagen fiber deposition and airway epithelial thickening were significantly reduced in each administration group, and the expressions of IL-6, IL-23 and IL-17A in serum were significantly decreased (P< 0.01). The protein expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 and mRNA expression levels of IL-6, JAK2 and STAT3 in lung tissue were significantly decreased (P<0.01). Conclusion: Yanghe Pingchuan Granules can significantly alleviate airway remodeling in asthmatic rats, and its mechanism may be through inhibiting the IL-6/JAK2/STAT3 signal axis.

Effects of plumbagin on migration and invasion of human hepatoma cell line via JAK2/STAT3 signaling pathway

Objective:To study the effect of plumbagin(PL)on the migration and invasion of human hepatocellular carcinoma(HCC)cells and its possible mechanism.Methods:The cell counting kit(CCK-8)was used to detect the effects of different concentrations of plumbagin on the proliferation of human hepatocellular carcinoma Huh-7 and LM3 cells.The effect of plumbagin on the migration ability of Huh-7 and LM3 cells was detected by scratch test and Transwell migration test,and the effect of on the invasion ability of Huh-7 and LM3 cells was detected by Transwell invasion test.Western Blot was used to detect the expression of E-cadherin,N-cadherin,matrix metalloproteinase-2 and related proteins in JAK2/STAT3 signaling pathway in Huh-7 and LM3 cells.Results:Plumbagin could inhibit the proliferation of Huh-7 and LM3 cells in a time-and concentration-dependent manner.Plumbagin inhibited the migration and invasion of Huh-7 and LM3 cells in a concentration dependent manner,and it can down-regulate the expression of N-cadherin and MMP-2 protein,up-regulate the expression of E-cadherin protein,and inhibit the activation of JAK2/STAT3 signaling pathway.Conclusion:Plumbagin can inhibit the migration and invasion of human hepatocellular carcinoma Huh-7 and LM3 cells,and the molecular mechanism of this process may be related to the inhibition of JAK2/STAT3 signaling pathway activation.

To explore the mechanism of Dahuang Lingxian Formula in relieving inflammatory response of bile duct cells based on IL-6/JAK/STAT3 signaling pathway

Objective:To explore the mechanism of action of Dahuang Lingxian Formula in alleviating the inflammatory response of bile duct cells in LPS-induced intrahepatic bile duct inflammation model rats based on IL-6/JAK/STAT3 signaling pathway.Methods:Fifty SD rats were randomly divided into five groups,blank group,model group,choling tablets(0.5 g/kg),and low and high concentration groups(2.4 g/kg and 4.8 g/kg)of Dahuang Lingxian Formula,ten rats in each group.Except for the blank group,the rats in each group were injected with 1.25 mg/kg LPS at the common bile duct at one time to construct an animal model of intrahepatic bile duct infection.After gavage on day 8,liver tissues were taken from rats at the hepatic hilum,and the histopathological changes of the hepatic hilum and biliary tree were observed by HE staining.The expression levels of serum glutamic alanine transaminase(ALT),glutamic oxalacetic transaminase(AST),malondialdehyde(MDA)and superoxide dismutase(SOD)were measured by biochemical method.The expression levels of interleukin 6(IL-6),Janus protein tyrosine kinase 2(JAK2),signal transducer and activator of transcription 3(STAT3)in rat serum were measured by enzyme-linked immunosorbent assay(ELISA).Protein immunoblotting(WB)and real-time fluorescence quantitative PCR(RT-qPCR)were used to detect the expression levels of IL-6,JAK2,STAT3 protein and mRNA in biliary tree tissues.Results:①Compared with the blank group,the structures such as interlobular bile ducts in the hepatic sinusoids and portal duct area of the model rats were destroyed,and inflammatory cells infiltrated around them.The expression of ALT,AST,MDA,IL-6,JAK2 and STAT3 in the serum increased significantly,the expression level of SOD decreased,and the expression levels of IL-6,JAK2 and STAT3 proteins and mRNA increased.②Compared with the model group,the degree of liver pathological damage in rats in the Chiling Ning tablet group and the low and high concentration groups of Dahuang Lingxian Formula were improved,which could significantly reduce the expression levels of ALT,AST,MDA,IL-6,JAK2,STAT3 and up-regulate SOD in serum,and down-regulate the expression of IL-6,JAK2,STAT3 protein and mRNA,with the best effect in the high concentration group of Dahuang Lingxian Formula.③Compared with the choling tablet group,the rats in the low and high concentration groups of Dahuang Lingxian Formula tended to normalize the degree of liver pathological damage,without obvious inflammatory cell infiltration,and the expression levels of ALT,AST,MDA,IL-6,JAK2,STAT3 and the expression levels of IL-6,JAK2,STAT3 protein and mRNA in serum were reduced,and the expression levels of SOD were increased,with the best effect of Dahuang Lingxian Formula The treatment effect was best in the high concentration group.Conclusion:The mechanism may be related to the down-regulation of IL-6/JAK/STAT3 signaling pathway activation,and the best therapeutic effect was achieved by the high concentration group of Dahuang Lingxian Formula.

LAIR-1通过阻断JAK2 V617F突变的人HEL细胞JAK/STAT和PI3K/AKT/mTOR信号通路抑制其增殖并促进其凋亡

目的研究人白细胞相关免疫球蛋白样受体1(LAIR-1)对Janus激酶2(JAK2)V617F突变的人急性髓系白血病HEL细胞JAK/信号转导子与转录激活子(STAT)和磷脂酰肌醇3激酶/蛋白激酶B/哺乳动物雷帕霉素靶蛋白(PI3K/AKT/mTOR)信号通路的调节作用,以及对细胞增殖和凋亡的影响。方法采用反转录PCR和基因测序鉴定JAK2 V617F突变;应用免疫共沉淀和Western blot法鉴定LAIR-1募集的蛋白酪氨酸磷酸酶(PTP)种类;采用CCK-8法检测HEL细胞的增殖;采用异硫氰酸荧光素标记的膜联素Ⅴ/碘化丙啶(annexinⅤ-FITC/PI)双标记结合流式细胞术检测HEL细胞的凋亡率;采用Western blot法检测JAK/STAT和PI3K/AKT/mTOR通路蛋白酪氨酸磷酸化水平及细胞周期蛋白D1(cyclin D1)、Bcl2相关X蛋白(BAX)和B细胞淋巴瘤因子2(Bcl2)的蛋白表达。结果在JAK2 V617F突变的HEL细胞中,LAIR-1与其配体胶原蛋白结合后可募集含Src同源域2磷酸酶2(SHP-2);LAIR-1可以下调HEL细胞JAK2、STAT1、STAT3、STAT5、AKT和mTOR的蛋白酪氨酸磷酸化水平,并能够显著抑制cyclin D1和Bcl2的表达,而对BAX的表达水平未见显著影响;LAIR-1能够明显抑制HEL细胞的增殖,促进HEL细胞凋亡。结论在JAK2 V617F突变的人白血病HEL细胞中,LAIR-1可通过募集SHP-2抑制JAK/STAT和PI3K/AKT/mTOR信号通路的活化,进而抑制HEL细胞的增殖,促进细胞凋亡。

Morroniside ameliorates lipopolysaccharide-induced inflammatory damage in iris pigment epithelial cells through inhibition of TLR4/JAK2/STAT3 pathway

AIM:To investigate the effect of morroniside(Mor)on lipopolysaccharide(LPS)-treated iris pigment epithelial cells(IPE).METHODS:IPE cells were induced by LPS and treated with Mor.Cell proliferation was detected by cell counting kit(CCK)-8,apoptosis was detected by flow cytometry,the levels of tumor necrosis factor-α(TNF-α),interleukin(IL)-6,and IL-8 were measured by enzyme-linked immunosorbent assay(ELISA)kits,and the protein expression of TLR4,JAK2,p-JAK2,STAT3,and p-STAT3 was analyzed by Western blotting.In addition,overexpression of TLR4 and Mor treatment of LPS-stimulated IPE cells were also tested for the above indices.RESULTS:Mor effectively promoted the proliferation and inhibited the apoptosis of LPS-treated IPE cells.In addition,Mor significantly reduced the levels of TNF-α,IL-6,and IL-8 and significantly inhibited the expression of TLR4,p-JAK2,and p-STAT3 in LPS-treated IPE cells.The effect of Mor on LPS-treated IPE cells was markedly attenuated after overexpression of TLR4.CONCLUSION:These findings suggest that Mor may ameliorate LPS-induced inflammatory damage and apoptosis in IPE through inhibition of TLR4/JAK2/STAT3 pathway.

补阳还五汤通过调控PI3K/Akt、JAK2/STAT3信号促进BMSC趋化迁移对外伤性脊髓损伤大鼠神经元活性及认知功能的影响

目的研究补阳还五汤通过调控磷脂酰肌醇-3激酶/蛋白激酶B(PI3K/Akt)、内源性酪氨酸激酶(JAK)2/信号传导和转录启动因子(STAT)3信号促进骨髓间充质干细胞(BMSCs)趋化迁移对外伤性脊髓损伤大鼠的神经元活性及认知功能的影响。方法选取健康大鼠53只,随机分为健康组(健康大鼠常规饲养)、损伤组(建立脊髓损伤模型)、干预组(补阳还五汤治疗)、对照组(甲泼尼龙治疗),每组12只,剩余5只大鼠用于补阳还五汤含药血清制备。流式细胞术鉴定BMSCs细胞。Transwell小室法测大鼠BMSCs迁移。高架十字迷宫和Morris水迷宫实验检测大鼠认知功能。苏木素-伊红(HE)染色检测脊髓组织病理形态。TUNEL测脊髓组织神经细胞凋亡。免疫组化检测p-JAK2、p-STAT3。Western印迹测PI3K、p-PI3K、Akt、p-Akt。结果传代后的培养细胞呈旋窝状或放射状贴壁生长,细胞多呈星形、梭形或三角状,培养3代后,细胞贴壁加快、形态均一,呈旋窝状或单层放射状生长。培养细胞表面抗原CD29、CD90为阳性,CD31、CD45为阴性,提示其为BMSCs细胞。与健康组相比,损伤组总路程、进入开臂次数、穿越平台次数显著降低,不同时间的潜伏期显著升高(P<0.05)。与损伤组相比,干预组与对照组总路程、进入开臂次数、穿越平台次数显著升高,不同时间的潜伏期显著降低(P<0.05)。干预组与对照组各指标对比无统计学差异(P>0.05)。健康组脊髓组织结构完整。损伤组脊髓组织疏松水肿,有细胞空泡变性产生。相较于损伤组,干预组与对照组大鼠脊髓组织病理形态有所改善。与健康组相比,损伤组BMSCs、PI3K、Akt、p-PI3K、p-Akt显著降低,神经细胞凋亡率、p-JAK2、p-STAT3显著升高(P<0.05)。与损伤组相比,干预组BMSCs、PI3K、Akt、p-PI3K、p-Akt显著升高,神经细胞凋亡率、p-JAK2、p-STAT3显著降低(P<0.05)。干预组与对照组各指标水平无统计学差异(P>0.05)。结论补阳还五汤通过激活PI3K/Akt通路抑制JAK2/STAT3信号通路的激活,促进BMSCs的迁移,减轻神经细胞的凋亡,起到神经保护的作用,从而改善脊髓损伤大鼠的认知功能。

Elevated retinol binding protein 4 levels are associated with atherosclerosis in diabetic rats via JAK2/STAT3 signaling pathway

BACKGROUND Atherosclerosis is a major cause of mortality worldwide and is driven by multiple risk factors,including diabetes,which results in an increased atherosclerotic burden,but the precise mechanisms for the occurrence and development of diabetic atheroscerosis have not been fully elucidated.AIM To summarize the potential role of retinol binding protein 4(RBP4) in the pathogenesis of diabetic atheroscerosis,particularly in relation to the RBP4-Janus kinase 2/signal transducer and activator of transcription 3(JAK2/STAT3)signaling pathway.METHODS Male Wistar rats were randomly divided into three groups,including a control group(NC group),diabetic rat group(DM group),and diabetic atherosclerotic rat group(DA group).The contents of total cholesterol(TC), high-density lipoprotein cholesterol(HDL-c), triglycerides(TG), low-density lipoprotein cholesterol(LDLc), fasting insulin(FINS),fasting plasma glucose,and hemoglobin A1 c(HbA1 c)were measured.Moreover,the adipose and serum levels of RBP4,along with the expression levels of JAK2, phosphorylated JAK2(p-JAK2), STAT3,phosphorylated STAT3(p-STAT3), B-cell lymphoma-2(Bcl-2), and Cyclin D1 in aortic tissues were also measured.Besides,homeostasis model assessment of insulin resistance(HOMA-IR) and atherogenic indexes(AI) were calculated.RESULTS Compared with the NC and DM groups,the levels LDL-c,TG,TC,FINS,HOMAIR,RBP4,and AI were upregulated,whereas that of HDL-c was downregulated in the DA group(P <0.05);the mRNA levels of JAK2,STAT3,Cyclin D1,and Bcl-2 in the DA group were significantly increased compared with the NC group and the DM group;P-JAK2,p-JAK2/JAK2 ratio,p-STAT3,p-STAT3/STAT3 ratio,Cyclin D1,and Bcl-2 at protein levels were significantly upregulated in the DA group compared with the NC group and DM group.In addition,as shown by Pearson analysis,serum RBP4 had a positive correlation with TG,TC,LDL-c,FINS,HbA1 C,p-JAK2,p-STAT3,Bcl-2,Cyclin D1,AI,and HOMA-IR but a negative correlation with HDL-c.In addition,multivariable logistic regression analysis showed that serum RBP4,p-JAK2,p-STAT3,and LDL-c were predictors of the presence of diabetic atherosclerosis.CONCLUSION RBP4 could be involved in the initiation or progression of diabetic atherosclerosis by regulating the JAK2/STAT3 signaling pathway.

3-epi-bufotalin suppresses the proliferation in colorectal cancer cells through the inhibition of the JAK1/STAT3 signaling pathway

Traditional Chinese medicine(TCM)has been increasingly employed in the last decades in China for both preventing and treating a variety of cancers.3-epi-bufotalin is an active ingredient of TCM“Chanpi”with anti-tumor potential.However,the effect and mechanism of 3-epi-bufotalin on colorectal cancers were not well disclosed.The present study demonstrated that 3-epi-bufotalin could reduce viability,trigger apoptosis,and block the cell cycle at the G2/M stage in colorectal cancer cell lines HT29,RKO,and COLO205 in vitro.Moreover,3-epi-bufotalin inhibited the JAK1/STAT3 signaling pathway.These results indicated the anti-proliferation ability of 3-epi-bufotalin in colorectal cancer cells.

基于SOCS1\3\JAK-STATS信号通路探讨软坚消瘿颗粒治疗肝郁脾虚型桥本甲状腺炎模型大鼠的实验研究

目的探究软坚消瘿颗粒对肝郁脾虚型桥本甲状腺炎(Hashimoto's thyroiditis,HT)大鼠甲状腺组织SOCS1\3\JAK-STATS信号通路表达的影响。方法SD大鼠40只,随机取10只作为正常对照组,剩余大鼠采用高碘饮水与皮下注射甲状腺球蛋白联合方案建立桥本甲状腺炎大鼠模型,通过慢性束缚应激、过度疲劳、饮食失节复合方法建立肝郁脾虚大鼠模型。模型复制成功后,随机分为模型对照组(n=10)、雷公藤多苷片组(n=10)以及软坚消瘿颗粒组(n=10)。正常对照组给予常规饲养,模型对照组予以蒸馏水2 mL,雷公藤多苷片组给予雷公藤多苷片9.45 mg/kg,软坚消瘿颗粒组给予软坚消瘿颗粒16.17 g/kg,各组干预时间为8周。干预结束后比较各组大鼠一般情况、HE染色情况、甲状腺功能指标、SOCS1\3\JAK-STATS相关蛋白表达情况。结果实验过程中无大鼠死亡,与模型组相比,软坚消瘿颗粒组大鼠血清TPOAb、TGAb、FT3、FT4水平较低,TSH水平较高(P<0.05);与雷公藤多苷片组相比,软坚消瘿颗粒组大鼠血清TPOAb、TGAb、FT3、FT4水平较低(P<0.05),TSH水平较高(P<0.05)。与模型组相比,软坚消瘿颗粒组大鼠SOCS1、SOCS2、p-JAK2、p-STAT1蛋白表达水平较高(P<0.05);与雷公藤多苷片组相比,软坚消瘿颗粒组大鼠SOCS1、SOCS2、p-JAK2、p-STAT1蛋白表达水平较高(P<0.05)。结论软坚消瘿颗粒能够有效改善肝郁脾虚型HT大鼠的甲状腺功能,提高组织SOCS1、SOCS3表达水平,抑制炎性物质传导,推测与JAK-STST信号通路异常激活有关。

miR-34a-5p提高顺铂在宫颈癌细胞中的敏感性及其可能机制

目的:探究miR-34a-5p对宫颈癌细胞顺铂敏感性的影响及其可能机制。方法:分别使用0、1、2、4、8μg/mL浓度的顺铂处理Hela细胞,CCK8检测细胞活力,qRT-PCR检测miR-34a-5p表达。设计并合成miR-34a-5p mimics,将细胞分成Blank、NC、miR-34a-5p、AG490、miR-34a-5p+AG490组。CCK8检测细胞活力,流式细胞术检测细胞凋亡率,Transwell实验检测侵袭细胞数,Western blot检测MDM4、STAT3、MRP1、Bax和BCL-2蛋白表达水平。结果:随着顺铂浓度的增加,Hela细胞活力和miR-34a-5p表达逐渐下降。与Blank/NC组相比,miR-34a-5p和AG490组细胞活力、侵袭细胞数、MRP1、BCL-2、MDM4、p-STAT3/STAT3蛋白表达显著下降(P<0.05),细胞凋亡率、Bax蛋白表达显著上升(P<0.05);与miR-34a-5p/AG490组相比,miR-34a-5p+AG490组细胞活力、侵袭细胞数、MRP1、BCL-2、MDM4、p-STAT3/STAT3蛋白表达显著下降(P<0.05),细胞凋亡率、Bax蛋白表达显著上升(P<0.05)。结论:miR-34a-5p可增加宫颈癌细胞对顺铂化疗的敏感性,其机制可能与MDM4/JAK/STAT3信号通路相关。

5, 7, 3′-三乙酰橙皮素对AA大鼠成纤维样滑膜细胞Jak2/Stat3信号通路及凋亡相关蛋白的影响

目的研究5,7,3'-三乙酰橙皮素(5,7,3'-triacetylhesperetin,TAHP)对佐剂性关节炎大鼠成纤维样滑膜细胞(FLS)Jak2/Stat3信号通路及凋亡相关蛋白的影响。方法用弗氏完全佐剂诱导大鼠AA模型;MTT法检测FLS的增殖反应;Hoechst 33258染色法检测FLS的凋亡;RT-PCR法检测FLS中Jak2、Stat3、Bcl-2、Bax及Caspase-3的基因表达;Western blot法检测FLS中p-Stat3及Caspase-3的蛋白表达情况。结果 TAHP呈剂量和时间依赖性抑制FLS的增殖(P<0.05);Hoechst 33258染色结果提示TAHP可以明显地促进FLS的凋亡;同时TAHP(50,250μmol·L-1)可以明显降低Jak2、Stat3及Bcl-2表达,而上调Bax及Caspase-3表达。Western blot结果显示,TAHP可降低p-Stat3的表达、上调Caspase-3表达。结论 TAHP可以抑制FLS增殖,其作用机制可能与抑制FLS Jak2/Stat3信号通路、促进Bax及Caspase-3表达、抑制Bcl-2的表达有关。

IL-2通过Jak3-Stat5通路促进巨噬细胞M1极化

目的探究IL-2在调控巨噬细胞极化分型方面的作用及机制。方法重组小鼠白介素-2(IL-2)刺激处于M0期的小鼠单核巨噬细胞RAW 264.7,同时以IL-4作为对照。Real-time PCR和Western blot检测M1型和M2型标志分子的表达;流式细胞术检测M1型和M2型巨噬细胞的百分比;Western blot检测Jak3和Stat5活化水平。结果经IL-2刺激后,处于M0的RAW 264.7细胞显著上调表达M1型标记分子,如IL-1β、IL-12、TNF-α和i NOS等;IL-2使巨噬细胞中M1型的比例由3.2%上升到24.6%,同时Jak3和Stat5分子的磷酸化水平显著提高。结论 IL-2具有促进巨噬细胞由M0向M1极化的作用,且该作用可能是通过Jak3-Stat5通路实现。

下调miRNA-199a-5p靶向HIF1α激活JAK/STAT3通路促进乳腺癌细胞增殖与恶性转移

目的:探讨miRNA-199a-5p在乳腺癌MCF-7细胞中的表达及其对细胞增殖与恶性转移的影响。方法:利用RT-qPCR检测miR-199a-5p在乳腺癌细胞(MCF-7细胞)和人正常乳腺上皮细胞(MCF-10A细胞)中的差异表达。过表达或下调miR-199a-5p表达,通过MTT试剂盒检测MCF-7细胞增殖能力,Transwell检测MCF-7细胞的侵袭能力,Western blot检测过表达及下调miR-199a-5p对MCF-7细胞EMT的影响。TargetScan分析miR-199a-5p的作用靶点,双荧光素酶报告基因实验检测miR-199a-5p和HIF1α之间的关系。RT-qPCR检测HIF1α在MCF-7细胞和MCF-10A细胞中的差异表达。HIF1α siRNA质粒转染细胞后,检测下调HIF1α对MCF-7细胞增殖、侵袭和EMT的影响。过表达HIF1α后,Western blot检测细胞内JAK、p-JAK、STAT3和p-STAT3蛋白的表达量。将AG490作用MCF-7细胞后再转染pcDNA-HIF1α质粒,检测MCF-7细胞增殖、侵袭和EMT能力。结果:与MCF-10A细胞相比,MCF-7细胞中miR-199a-5p表达明显降低(P<0.01),HIF1α表达明显上升(P<0.01)。过表达miR-199a-5p抑制了MCF-7细胞增殖、侵袭与EMT,下调miR-199a-5p促进了MCF-7细胞的增殖、侵袭与EMT;miR-199a-5p靶向HIF1α,且负调控HIF1α表达;siRNA下调HIF1α表达后明显抑制了MCF-7细胞增殖、侵袭和EMT;上调HIF1α表达后,激活MCF-7细胞内JAK/STAT3通路,AG490作用MCF-7细胞能明显抑制HIF1α对MCF-7细胞增殖、侵袭和EMT的促进作用。结论:下调miRNA-199a-5p靶向HIF1α激活JAK/STAT3通路促进乳腺癌细胞增殖与恶性转移。

Value of spiral CT perfusion parameters for evaluating acute pancreatitis and their correlation with inflammatory factor and JAK2/STAT3 signaling pathway

Objective: To study the value of spiral CT perfusion parameters for evaluating acute pancreatitis and their correlation with inflammatory factor and JAK2/STAT3 signaling pathway. Methods: Patients with acute pancreatitis and patients with pancreatic trauma who underwent surgical resection in Liaocheng Dongchangfu People's Hospital between May 2014 and March 2017 were selected and enrolled in the AP group and the control group of the research respectively;spiral CT perfusion scanning was conducted before surgery to measure the blood flow (BF), blood volume (BV), and mean transit time (MTT), and the serum was collected to determine the contents of inflammatory factors;pancreatitis tissue and normal pancreatic tissue were collected after surgical resection to determine the expression of JAK2/STAT3 signal molecules. Results: pancreatic tissue BF and BV levels of AP group were significantly lower than those of control group while MTT level was not different from that of control group;CRP, PCT, HMGB-1, Ghrelin and sTREM-1 contents in serum as well as JAK2, STAT3, Bcl-2 and Bcl-xL mRNA expression in pancreatic tissue of AP group were significantly higher than those of control group and negatively correlated with BF and BV levels in pancreatic tissue. Conclusion: Spiral CT perfusion parameters BF and BV can reflect the microcirculatory disorder of acute pancreatitis and are associated with the increased secretion of inflammatory factors and the activation of JAK2/STAT3 signaling pathway in the course of disease.