玉泉汤加减对OSF癌变的干预效果及对c-Myc、Cyclin D1、β-catenin表达的影响

目的:研究玉泉汤加减对口腔黏膜下纤维化(oral submucous fibrosis,OSF)癌变的干预效果及对原癌基因(c-Myc)、细胞周期蛋白D1(Cyclin D1)、β-连环蛋白(β-catenin)表达的影响。方法:本研究选取2018年4月至2019年4月在我院就诊的OSF癌变患者92例,按照完全随机法将患者分为西药组和中药组,每组各46例。西药组给予曲安奈德注射液联合盐酸利多卡因注射,中药组在西药组的基础上加服中药玉泉汤加减,检测和比较两组患者治疗前后β-catenin、纤维蛋白原(FIB)、c-Myc、白介素-6(IL-6)、转化生长因子-β1(TGF-β1)、Cyclin D1表达的变化,治疗效果以及不良反应的发生情况。结果:中药组治疗后的总有效率(91.30%)显著高于西药组(67.39%,P0.05)。两组患者治疗后β-catenin、FIB、c-Myc、IL-6、TGF-β1及Cyclin D1的表达均低于治疗前(P0.05);中药组治疗后β-catenin、FIB、c-Myc、IL-6、TGF-β1及Cyclin D1的表达均明显低于西药组(P0.05)。中药组治疗后开口度比西药组小、灼痛感轻及纤维条索少(P0.05)。中药组治疗后的不良反应率(2.17%)显著低于西药组(13.04%,P0.05)。结论:玉泉汤加减治疗OSF癌变的效果及安全性均显著优于曲安奈德注射液联合盐酸利多卡因注射治疗,可能与其能显著下调c-Myc、Cyclin D1、β-catenin的表达,改善患者的临床症状有关。     

用于治疗囊性纤维化的药物Lumacaftor

囊性纤维化(CF)是一种严重威胁生命的遗传性疾病,该病系由CF跨膜传导调节蛋白(CFTR)的缺陷所引起。正常的CFTR为1种存在于细胞膜上的氯离子通道蛋白,氯离子可通过此通道蛋白自由进出细胞,细胞也可分泌1层稀薄的黏液以保护气道上皮。若cftr基因出现G551D突变,CFTR的通道就不能正常开放,氯离子也就无法自由地进出细     

肺部囊性纤维化诊断CT优于磁共振

在2011年欧洲放射学大会上意大利和荷兰共同推出一项研究成果,在肺部囊性纤维化诊断CT扫描比磁共振成像具有更强的优势。研究人员对40名平均年龄16.7岁囊肿性纤维化患者进行诊断,     

外泌体调控肿瘤侵袭转移的研究进展

外泌体(exosomes)是一种由多种类型细胞分泌的磷脂双层膜囊泡，直径在30～100 nm之间。它们存在于几乎所有体液中，如血液、脑脊液、尿液、胆汁、乳汁等。外泌体能够携带多种物质，介导细胞间通讯并反映来源细胞的状态。外泌体在肿瘤进展中发挥了重要的作用，它们可以通过促进肿瘤细胞上皮-间质转化(epithelial-mesenchymal transition,EMT)、形成转移前微环境(pre-metastatic niche,PMN)以及促进促炎症和免疫抑制微环境的形成，促进肿瘤的侵袭转移。本文综述了外泌体调控肿瘤侵袭转移的作用机制，包括外泌体介导的细胞间信号传递、外泌体调控肿瘤细胞增殖、迁移和侵袭等方面。此外，本文还探讨了外泌体在肿瘤微环境中的作用及其与免疫逃逸的关系，期望为深入研究外泌体对肿瘤的调控作用提供新的思路、为肿瘤治疗提供新的靶点和策略。     

环状RNA在不同类型上皮间质转化中的作用

近年来发现环状RNA(circular RNA, circRNA)在各种类型的上皮间质转化(epithelial-mesenchymal transition,EMT)中发挥了重要的作用。本文就EMT的概念和分类、circRNA的分类和生成,以及circRNA分别在EMT过程中作用的国内外研究进展作一综述,以期为发生EMT的器官纤维化、肿瘤等疾病的靶向治疗和预防寻找新的研究方向。     

Cortactin is involved in transforming growth factor-β1-induced epithelial-mesenchymal transition in AML-12 cells

Cortactin is an F-actin binding protein, regulating cell movement and adhesive junction assembly. However, the function of cortactin in epithelial-mesenchymal transition （EMT） remains elusive. Here we found that during transforming growth factor-β1 （TGF-β1）- induced EMT in AML-12 murine hepatocytes, cortactin underwent tyrosine dephosphorylation. Inhibition of the dephosphorylation of eortactin by sodium vanadate blocked TGF-β1-induced EMT. Knockdown of cortactin by RNAi led to decrease of intercellular junction proteins E-cadherin and Zonula occludens-1 and induced expression of mesenchymal protein fibronectin. Additionally, knockdown of cortactin further promoted TGF-β1-induced EMT in AML-12 cells, as determined by EMT markers and cell morphological changes. Moreover, migration assay showed that cortactin knockdown promoted the migration of AML-12 cells, and also enhanced TGF-β1-induced migration. Our study showed the involvement of cortactin in the TGF- β1-induced EMT.     

Characterization of OP9 as authentic mesenchymal stem cell line

Mesenchymal stem cells (MSCs) are multipotent stem cells capable of differentiating into various cell types,including osteocytes,chondrocytes,adipocytes,myocytes,and tenocytes.However,the difficulty or failure in expanding the mouse MSCs in vitro greatly hampered important research in animal models.The OP9,a stromal cell line from mouse bone marrow,has hematopoietic supportive capacity.Here,we report that the OP9 has the immunophenotype (CD45-,CD11b-,FLK-1-,CD31-,CD34-,CD44+,CD29+,Sca-1+,CD86-,and MHCII-) identical to canonical mouse MSCs.The expression of CD140a+,CD140b+,α-SMA+ and Calponin+ suggested the perivascular origin of OP9.Functionally,the OP9 had strong clonogenic ability and could be induced into osteocytes,chondrocytes and adipocytes.The lymphocyte transformation test (LTT) and mixed leukocyte reaction (MLR) showed that the OP9 could suppress T lymphocyte proliferation stimulated by nonspecific mitogens (PHA) or allogeneic lymphocytes (BALB/c T cells).Finally,the migration of OP9 could be efficiently induced by bFGF,IGF-1,IL-3,PDGF-BB,TGF-β1 and TGF-β3.In conclusion,the OP9 were bona fide MSCs,and such homogenous cell line will be helpful to delineate biological features of MSCs at the stem cell level.     

心肌成纤维细胞来源的外泌体miRNA参与放射性心肌纤维化损伤

外泌体及携带的miRNA在组织器官纤维化中发挥重要作用，但相关于其在放射性心肌纤维化(RICF)的研究十分有限，本研究拟运用生物信息学分析辐射诱导的外泌体miRNA通过辐射旁效应促进RICF发生的可能分子机制。心肌成纤维细胞(CFs)是RICF的主要效应细胞，用2 Gy X射线辐照CFs后超速离心提取辐射诱导的外泌体(X-exo)和未受照射的CFs外泌体(Exo),并进行外泌体电镜观察、NTA浓度检测和CD9、CD63、CD81等外泌体表面标志蛋白质的纳米流式鉴定；随后通过RNA-seq技术检测外泌体miRNA表达谱，筛选差异表达的miRNA,预测其潜在靶基因并进行富集分析。结果显示：与未受照射的CFs外泌体相比，X射线诱导的外泌体中表达上调的miRNAs共9个(|log₂ Fold Change|>1,P<0.05),其中|log₂ Fold Change|>2的有8个，表达下调的miRNAs共19个(|log₂ Fold Change|>1,P<0.05),其中|log₂