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.     

养血解毒汤对咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损的干预作用

目的:观察养血解毒汤对咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损的干预作用。方法:STAT3转基因小鼠24只,随机分为正常对照组、模型组、养血解毒汤组和甲氨蝶呤组,每组6只,采用外用咪喹莫特诱导皮肤银屑病样模型。分别观察皮损面积和疾病严重程度(psoriasis area and severity index,PASI),光镜下观察皮损组织形态学变化和表皮层厚度;采用皮肤水分油分测试笔检测小鼠背部皮肤水分和油分含量;免疫组织化学法检测皮损中增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)和T淋巴细胞表面标志CD3表达;采用实时荧光定量PCR技术检测皮损Th17类细胞因子(IL-17A、IL-17C、IL-22和RORγt)mRNA表达;采用Western blot检测皮损STAT3通路蛋白(STAT3、p-STAT3、JAK3、p-JAK3和SOCS3)的表达水平。结果:(1)养血解毒汤组PASI评分明显低于模型组,HE染色观察发现养血解毒汤组皮损表皮增生较模型组少,角化不全的细胞明显减少,皮肤厚度降低(P0.01);(2)养血解毒汤组皮损油分和水分含量均明显高于模型组(P0.05);(3)养血解毒汤组PCNA阳性表达远低于模型组(P0.01);(4)养血解毒汤组脾脏重量低于模型组(P0.05);(5)养血解毒汤组Th17相关因子(IL-17A、IL-17C、IL-22和RORγt)表达水平均低于模型组,此外,p-STAT3和p-JAK3表达量亦低于模型组,而SOCS3的表达高于模型组。结论:养血解毒汤可能通过抑制STAT3的磷酸化,减少Th17相关因子(IL-17A、IL-17C、IL-22和RORγt)的分泌,由此改善咪喹莫特诱导的STAT3转基因小鼠银屑病样皮损改变。     

雷帕霉素抑制IgA肾病大鼠肾小球信号蛋白STAT3的活化

目的探讨雷帕霉素对IgA肾病大鼠肾组织p-JAK2、STAT3、p-STAT3和PCNA表达的影响。方法制备IgA肾病动物模型,分为对照组、IgA肾病组、氯沙坦(ls)和雷帕霉素(rapa)治疗组。监测大鼠的生化指标及用免疫组化、Western blot、RT-PCR等方法检测肾组织p-JAK2、STAT3、p-STAT3和PCNA的蛋白及mRNA的表达。结果IgA肾病大鼠较对照组24 h尿蛋白定量明显升高、血白蛋白降低、BUN以及Cr水平明显升高(P<0.01);IgA肾病大鼠p-JAK2、STAT3、p-STAT3和PCNA蛋白及mRNA水平也显著高于对照组;雷帕霉素能显著缓解上述改变(P<0.01)。结论雷帕霉素可能通过抑制IgA肾病大鼠肾小球JAK/STAT信号途径、直接抑制STAT3的活化以及抑制系膜细胞的增殖而减轻病变程度。     

胃癌患者血清IL-1的升高和癌组织JAK2/STAT3信号通路的激活

目的 探讨胃癌患者血清中白细胞介素1(IL-1)含量升高及癌组织中JAK2/STAT3信号通路激活在胃癌生长过程中的作用.方法 选取甘肃省武威肿瘤医院胃癌手术患者及同期健康体检者各30例;酶联免疫吸附法(ELISA)检测样本血清中IL-1和IL-10的含量;免疫组化和Western blot分别检测各组织中Bcl-2、...     

Scorpion venom polypeptide accelerate irradiated hematopoietic cells proliferation

ObjectiveTo study the effects of Scorpion venom polypeptide (SVP) on the irradiated hematopoietic progenitor cells and the initial research of its mechanism.Methods and materials(1) MTT array was used to select the effective concentration of SVP that had proliferate action on the irradiated early hematopoietic cells (K562), just like the doses of experiment in vitro; (2) The male BALB/c mice were divided into NS control group, SVP IV group and SVP V group. After treatment and sublethal irradiation, the C-KIT and IL-6Rα levels of bone marrow cells were detected by immunohistochemistry and tissue array; (3) The bone marrow cells of the normal BALB/c mice, given to SVP IV and SVP V after different action times respectively, were taken to extract the total proteins inside the cell, the phosphorylated STAT3 protein levels in JAK-STAT signal transduction pathway were detected by Western blot array.Results(1) 30 mg/L SVP IV has an obvious effect to accelerate K562 cell proliferation; (2) The C-KIT and IL-6Rα expression on bone marrow cell surfaces in SVP IV and SVP V groups were negative (control with the saline group, p > 0.05); (3) The phosphorylated STAT3 protein levels in bone marrow cells of SVP IV group had a rise-and-fall trend within 30 min, while the test of SVP V group showed that the phosphorylated STAT3 protein levels obviously elevated after 30 min.ConclusionsThe results show that certain SVP IV concentration can protect the hematopoietic progenitor cells after irradiation, and the underlying mechanism of SVP accelerating the hematopoietic recovery in irradiated mice may be related to the activation of the JAK-STAT signal pathway.     

Occurrence of metachronous or synchronous lesions after endoscopic treatment of gastric epithelia dysplasia- impact of histologic features of background mucosa

Aims

Endoscopic resection is a safe and effective method to treat gastric epithelia dysplasia (GED). However, the development of metachronous and synchronous lesions after treatment has become a major concern. In this study, we investigated clinicopathologic features of 105 GED lesions from endoscopic resections between January 2008 and December 2009. Our goal is to find histologic factors that predict synchronous and metachronous lesions after ESD treatment. We assessed the degree of intestinal metaplasia (IM) and atrophy, type of IM, presence of gastritis cystica profunda, and crypt dysplasia in the adjacent mucosa.

Lower levels of IL-4 and IL-10 influence lipodystrophy in HIV/AIDS patients under antiretroviral therapy

Background

The role of interleukins in the pathogenesis of lipodystrophy in HIV/AIDS-patients is still not understood. The aim of this study was to evaluate the relationship between serum levels of interleukins between HIV/AIDS-patients with or without lipodystrophy, as well as between different subgroups of lipodystrophy (lipoatrophy, lipohypertrophy, mixed-fat-redistribution) and patients without lipodystrophy.

电针改善慢性脑低灌注大鼠空间学习记忆能力和海马IL-6/JAK2/STAT3的信号调节

目的:观察电针调节慢性脑低灌注(chronic cerebral hypoperfusion,CCH)对大鼠海马JAK2/STAT3通路和炎症反应的影响,探讨电针减轻CCH所致空间学习记忆能力障碍的作用机制。方法:将成年SD雄性大鼠随机分为假手术组、模型组和电针组(n=10),行改良永久性双侧颈总动脉结扎术造模,电针组采用2/15 Hz频率刺激(30 min/d,持续4周)大鼠百会和大椎穴,其余2组动物进行平衡处理。采用Morris水迷宫实验和激光多普勒血流仪评估及检测大鼠的空间学习记忆能力和局部脑血流量(regional cerebral blood flow,r CBF);采用ELISA、RTPCR与Western blot法分别检测大鼠海马组织中炎性因子白细胞介素6(IL-6)和IL-1β浓度,海马JAK2和STAT3的mRNA表达及其磷酸化蛋白含量;HE染色观察海马组织的病理变化。结果:电针组大鼠r CBF、各时点平均逃避潜伏期和原平台象限停留时间均较模型组动物有明显改善(P0.01或P0.05)。电针组大鼠海马组织中IL-1β与模型组相比显著降低(P0.05),而IL-6的含量有显著升高(P0.05),海马JAK2和STAT3的mRNA表达及pJAK2和p-STAT3蛋白含量也均比模型组明显升高(P0.05),海马CA1区神经细胞损伤减轻。结论:电针可通过调节IL-6/JAK2/STAT3信号通路抑制炎症反应,从而减轻海马神经细胞损伤和认知障碍。     

Copy number variations of the IL-22 gene are associated with ankylosing spondylitis: A case-control study in Chinese Han population

IL-22 provides a new insight into the mechanisms of autoimmunity, and copy number variations (CNVs) are associated with autoimmune diseases. This study aims to explore the association of IL-22 gene CNVs with ankylosing spondylitis (AS) susceptibility. The copy numbers of IL-22 gene (2 fragments: IL-22_1, IL-22_2) were examined by AccuCopy? methods in a cohort of 649 AS patients and 628 controls. Association of IL-22 CNVs and AS susceptibility was analyzed, and AS risk was estimated by Odds Ratio (ORs) and 95% confidence intervals (CIs), and the Benjamini-Hochberg method was applied to regulate the false discovery rate (FDR). We found one copy of IL-22 gene was significantly associated with AS [OR = 0.345, 95%CI (0.144, 0.827), P = 0.013, P_FDR = 0.026] in the IL-22_2 fragment, and this association still exist after adjustment of age and sex [OR = 0.344, 95%CI (0.143, 0.825), P = 0.017, P_FDR = 0.034]. In the stratification analysis by gender, the statistical difference was detected in males in the IL-22_2 fragment [OR = 0.306, 95%CI (0.121, 0.778), P = 0.009, P_FDR = 0.018; adjusted OR = 0.306, 95%CI (0.120, 0.777), P = 0.013, P_FDR = 0.026]. We suggest that IL-22 CNVs are associated with AS and that lower copy number might be a protective factor for AS, especially in male patients.     

A similar pro/anti-inflammatory cytokine balance is present in the airways of competitive athletes and non-exercising asthmatics

Purpose

Intensive exercise modifies airway inflammation and infection susceptibility. We aimed to determine the effect of exercise on pro- and anti-inflammatory cytokine (TNF-α, IL-1ra, IL-10) and innate immunity protein (HSPA1, sCD14) levels in exhaled breath condensate (EBC) and nasal secretions of competitive athletes, non-exercising asthmatics and healthy controls (HC).

Association of cytokine gene polymorphisms with the complications of allogeneic haematopoietic stem cell transplantation

The purpose of our study was to confirm the prevalence of the association between single nucleotide polymorphisms present in genes encoding cytokines and the complications occurring after haematopoietic stem cell transplantation (HSCT). 108 recipients and 81 donors were typed for TNF-α ( ?308), TGF-β1 (codon 10, 25), IL-10 (?1082, ?819, ?592), IL-6 (?174) and INF-γ (+874). Our studies have shown a tendency toward association between the occurrence of acute form of graft versus host disease (aGVHD) and IL-6 genotype. Homozygote C/C was less likely to develop aGVHD (p = 0,09). Genotype GCC/ATA in IL-10 recipient gene alone had protective effect against the occurrence of aGVHD (p = 0,01). Furthermore, GCC/ATA protected the host against developing the disease in the clinically relevant grades (II-IV) (p = 0,03). In addition, the recipient’s T/T G/G genotype (TGF-β1) predisposed to the development of both acute (p = 0,06 – trend) and chronic (p = 0,04) GVHD and also severe aGVHD (p = 0,004). We also observed a statistically significant association between the genotype of recipient and the risk of infection – the protective function of the G/C IL-6 in the bloodstream infections (p = 0,001). Our results suggest that IL-6, IL-10 and TGF-β1 genotypes of recipient are the most associated with the risk of complications after HSCT.     

酪氨酸蛋白激酶JAK1 在IL-6诱导JAK/STAT 途径活化中的作用

目的 酪氨酸蛋白激酶JAK1和转录因子STAT3为参与IL－6诱导的JAK／STAT信号转导途径的两种主要的信号蛋白分子。本研究试图揭示JAK1在JAK／STAT途径诱导活化中的作用。方法 分别采用凝胶阻滞电泳（EMSA）和免疫沉淀（IP）法观察IL－6刺激作用下STAT3和JAK1在3种骨髓瘤细胞系（XG－7，KM－3和Sko-007)中的诱导活化状态。采用RTPCR和Western-blot法检测这两种信号蛋白分子在以上3株靶细胞中的表达情况。结果 尽管SAT3在3株靶细胞中都能够正常表达，但只有Sko-007细胞中出现IL－6刺激作用下STAT3的诱导活化。在XG－7细胞中，既没有检测到JAK1的表达，也没有观察到JAK1的活化。尽管JAK1在KM－3细胞中能够正常表达，但不能被IL－6诱导激活。Sko-007细胞中则同时出现JAK1的表达及IL－6刺激后的诱导活化。结论 JAK1的正常表达和激活是IL－6刺激作用下JAK／STAT信号转导途径在骨髓瘤细胞中诱导活化的前提条件。     

应用RNAi技术沉默STAT3基因对乳腺癌MCF-7细胞的影响

目的 探讨应用RNAi技术沉默信号转导子与转录活化子3（STAT3）基因对乳腺癌MCF-7细胞的影响。方法 应用RNAi技术，以psilencer1．0-U6-STAT3-siRNA重组质粒体外转染MCF-7细胞，采用MIT实验、流式细胞仪检测MCF-7转染前后细胞增殖、细胞周期和早期凋亡的变化，通过Western blotting及半定量RT-PCR检测STAT3基因不同水平的表达。结果 MTT实验、流式细胞仪的结果显示，重组质粒转染组的MCF-7细胞的增殖明显受到抑制，且出现凋亡现象；Western blotting及半定量RT-PCR结果显示，重组质粒转染组细胞的STAT3基因表达在蛋白及RNA水平上都显著低于对照组（P〈0．01），而空白对照组及空质粒组无明显差异（P〉0．05）。结论 应用RNAi技术沉默STAT3基因可以降低乳腺癌MCF-7细胞STAT3的表达，进而抑制细胞的生长、增殖及诱导细胞的凋亡。     

Lactobacillus plantarum culture supernatants improve intestinal tissue exposed to deoxynivalenol

In the present study, histological, morphometrical and ultrastructural analysis were performed to investigate intestinal mucosa changes in piglets exposed to deoxynivalenol alone or associated with two strains of Lactobacillus plantarum and the respective culture supernatants. Jejunal explants were incubated for 4 h in culture medium with a) only culture medium (DMEM, control group), b) deoxynivalenol (DON, 10 μM), c) heat-inactivated Lactobacillus plantarum strain1 ? LP1 (1.1 × 10⁸ CFU/ml) plus DON, d) heat-inactivated Lactobacillus plantarum strain2–LP2 (2.0 × 10⁹ CFU/ml) plus DON, e) heat-inactivated Lactobacillus plantarum strain1 culture supernatant (CS1) plus DON, and f) heat-inactivated Lactobacillus plantarum strain1 culture supernatant (CS1) plus DON. Explants exposed to DON and DON plus LP1 and LP2 showed a significant increase in histological changes (mainly villi atrophy and apical necrosis) and a significant decrease in villi height when compared to unexposed explants. However, explants treated with CS1 + DON and CS2 + DON remained similar to the control group both in histological and morphometrical aspects. DON also induced a significant decrease in goblet cell density compared to control whereas CS1 + DON treatment induced an increase in the number of goblet cells in comparison to DON explants. In addition, ultrastructural assessment showed control, CS1 + DON and CS2 + DON explants with well delineated finger shape villi, meanwhile DON-treated, LP1 + DON and LP2 + DON explants showed a severe villi atrophy with leukocytes exudation on the intestinal surface. Taken together, our results indicate that the culture supernatant treatment reduced the toxic effects induced by DON on intestinal tissue and may contribute as an alternative strategy to reduce mycotoxin toxicity.     

MiR-142-5p act as an oncogenic microRNA in colorectal cancer: Clinicopathological and functional insights

Objectives

miR-142-5p was noted aberrantly expressed and plays important roles in different pathophysiological conditions in human. The present study aims to examine the expression of miR-142-5p and its association with clinicopathological factors in a large cohort of patients with colorectal cancer. In addition, the cellular effects of miR-142-5p and its interacting targets in colon cancer cells were investigated.

FOXP3, ICOS and ICOSL gene polymorphisms in systemic sclerosis: FOXP3 rs2294020 is associated with disease progression in a female Italian population

Systemic sclerosis (SSc), an autoimmune disorder, is characterized by vasculopathy, inflammation, progressive perivascular and interstitial fibrosis. Its pathogenesis is largely unknown, however strong evidences suggest that genetic predisposition may contribute to SSc development.Several gene polymorphisms involved in regulatory T cell function have been identified in many autoimmune diseases, including SSc. Moreover, dysregulation of co-stimulatory and/or co-inhibitory signals, including ICOS signalling, can lead to autoimmunity. The aim of the present study was to investigate the association of the FOXP3 rs2294020, ICOS rs6726035 and ICOSL rs378299 SNPs with both the susceptibility and the progression to SSc in an Italian case-series of patients.SNP genotyping results were successfully obtained from a total of 350 subjects including 166 individuals with SSc and 184 healthy controls. Although analysis tests did not show any significant associations between the SNPs under study and susceptibility to SSc, the occurrence of FOXP3 rs2294020 in female patients was associated with decreased time to progression from early to definite SSc (allelic model: HR = 1.43; CI = 1.03-1.99; p = 0.03; dominant model: HR = 1.54; CI = 1.04-2.28; p = 0.03). The inclusion of presence of ACA autoantibodies in the model did not significantly change the estimates. No conclusions can be drawn for the susceptibility to the disease or the time to progression in men due to the low statistical power. This study provides evidence of the association of rs2294020 with SSc evolution in female patients, modulating the time of progression from the diagnosis of early SSc to the diagnosis of definite SSc, while no effect on SSc susceptibility per se was found. rs2294020 may be considered a disease-modifying gene-variant rather than a disease-susceptibility SNP in SSc.