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Unravelling myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS): Gender-specific changes in the microRNA expression profiling in ME/CFS. 揭开肌痛性脑脊髓炎/慢性疲劳综合征(ME/CFS)的神秘面纱:ME/CFS微RNA表达谱的性别特异性变化。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-05-01 Epub Date: 2020-04-14 DOI: 10.1111/jcmm.15260
Amanpreet K Cheema, Leonor Sarria, Mina Bekheit, Fanny Collado, Eloy Almenar-Pérez, Eva Martín-Martínez, Jose Alegre, Jesus Castro-Marrero, Mary A Fletcher, Nancy G Klimas, Elisa Oltra, Lubov Nathanson

Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a multisystem illness characterized by medically unexplained debilitating fatigue with suggested altered immunological state. Our study aimed to explore peripheral blood mononuclear cells (PBMCs) for microRNAs (miRNAs) expression in ME/CFS subjects under an exercise challenge. The findings highlight the immune response and inflammation links to differential miRNA expression in ME/CFS. The present study is particularly important in being the first to uncover the differences that exist in miRNA expression patterns in males and females with ME/CFS in response to exercise. This provides new evidence for the understanding of differential miRNA expression patterns and post-exertional malaise in ME/CFS. We also report miRNA expression pattern differences associating with the nutritional status in individuals with ME/CFS, highlighting the effect of subjects' metabolic state on molecular changes to be considered in clinical research within the NINDS/CDC ME/CFS Common Data Elements. The identification of gender-based miRNAs importantly provides new insights into gender-specific ME/CFS susceptibility and demands exploration of sex-suited ME/CFS therapeutics.

肌痛性脑脊髓炎/慢性疲劳综合征(ME/CFS)是一种多系统疾病,其特征是医学上无法解释的衰弱性疲劳,并伴有免疫状态的改变。我们的研究旨在探索运动挑战下 ME/CFS 受试者外周血单核细胞(PBMCs)的微RNAs(miRNAs)表达。研究结果强调了免疫反应和炎症与 ME/CFS 中不同 miRNA 表达的联系。本研究首次发现了男性和女性 ME/CFS 患者在运动时 miRNA 表达模式的差异,这一点尤为重要。这为了解不同 miRNA 表达模式和 ME/CFS 运动后不适提供了新的证据。我们还报告了与 ME/CFS 患者营养状况相关的 miRNA 表达模式差异,强调了受试者的新陈代谢状态对分子变化的影响,这些变化应在 NINDS/CDC ME/CFS 通用数据元素的临床研究中加以考虑。基于性别的 miRNAs 的鉴定为了解 ME/CFS 易感性的性别特异性提供了新的视角,并要求探索适合性别的 ME/CFS 治疗方法。
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引用次数: 0
Protein disulphide isomerase can predict the clinical prognostic value and contribute to malignant progression in gliomas. 蛋白二硫异构酶可以预测胶质瘤的临床预后价值并有助于恶性进展。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-05-01 Epub Date: 2020-04-17 DOI: 10.1111/jcmm.15264
Qing Hu, Kai Huang, Chuming Tao, Xingen Zhu

Increasing evidence from structural and functional studies has indicated that protein disulphide isomerase (PDI) has a critical role in the proliferation, survival and metastasis of several types of cancer. However, the molecular mechanisms through which PDI contributes to glioma remain unclear. Here, we aimed to investigate whether the differential expression of 17 PDI family members was closely related to the different clinicopathological features in gliomas from The Cancer Genome Atlas (TCGA) and Chinese Glioma Genome Atlas data sets. Additionally, four subgroups of gliomas (cluster 1/2/3/4) were identified based on consensus clustering of the PDI gene family. These findings not only demonstrated that a poorer prognosis, higher WHO grade, lower frequency of isocitrate dehydrogenase mutation and higher 1p/19q non-codeletion status were significantly correlated with cluster 4 compared with the other clusters, but also indicated that the malignant progression of glioma was closely correlated with the expression of PDI family members. Moreover, we also constructed an independent prognostic marker that can predict the clinicopathological features of gliomas. Overall, the results indicated that PDI family members may serve as possible diagnostic markers in gliomas.

越来越多的结构和功能研究表明,蛋白二硫异构酶(PDI)在几种类型癌症的增殖、生存和转移中起着关键作用。然而,PDI参与胶质瘤的分子机制尚不清楚。在这里,我们旨在研究17个PDI家族成员的差异表达是否与肿瘤基因组图谱(TCGA)和中国胶质瘤基因组图谱数据集中胶质瘤的不同临床病理特征密切相关。此外,根据PDI基因家族的一致聚类,确定了胶质瘤的四个亚群(集群1/2/3/4)。这些发现不仅表明预后较差、WHO分级较高、异柠檬酸脱氢酶突变频率较低、1p/19q非编码状态较高与聚类4较其他聚类显著相关,而且表明胶质瘤的恶性进展与PDI家族成员的表达密切相关。此外,我们还构建了一个独立的预后标志物,可以预测胶质瘤的临床病理特征。总之,结果表明PDI家族成员可能作为胶质瘤的可能诊断标记。
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引用次数: 7
Epidermal growth factor regulation by autophagy-mediated lncRNA H19 in murine intestinal tract after severe burn. 重度烧伤小鼠肠道自噬介导的lncRNA H19对表皮生长因子的调节作用。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-05-01 Epub Date: 2020-04-16 DOI: 10.1111/jcmm.15262
Cuijie Li, Mengmeng Zhuang, Bo Zhu, Ye Li, Wenwen Zhang, Hao Yan, Pan Zhang, Dan Li, Juan Yang, Yuan Sun, Haijun Chen, Qingwei Cui, Peisheng Jin, Yong Sun

To investigate the regulation of epidermal growth factor (EGF) by autophagy-mediated long non-coding RNA (lncRNA) H19 in the intestinal tracts of severely burned mice. C57BL/6J mice received third-degree burns to 30% of the total body surface area. Rapamycin and 3-methyladenine (3-MA) were used to activate and inhibit autophagy, and the changes in LC3 and Beclin1 levels were assessed by Western blotting. The effect of autophagy on lncRNA H19 was detected by qRT-PCR. Adenovirus-mediated overexpression of lncRNA H19 in IEC-6 cells was used to assess the effects of lncRNA H19 on EGF and let-7g via bioinformatics analysis, Western blotting and qRT-PCR. let-7g mimic/inhibitor was used to overexpress/inhibit let-7g, and qRT-PCR and Western blotting were used to detect the effects of let-7g on EGF. The expression levels of LC3-II, Beclin1 and lncRNA H19 were increased in intestinal tissues and IEC-6 cells after rapamycin treatment but were reversed after 3-MA treatment. LC3-II, Beclin1 and lncRNA H19 levels increased in intestinal tissues after the burn, and these increases were more significant after rapamycin treatment but decreased after 3-MA treatment. The lncRNA H19 overexpression in IEC-6 cells resulted in increased and decreased expression levels of EGF and let-7g, respectively. Furthermore, overexpression and inhibition of let-7g resulted in decreased and increased expression of EGF, respectively. Taken together, intestinal autophagy is activated after a serious burn, which can increase the transcription level of lncRNA H19. lncRNA H19 may regulate the repair of EGF via let-7g following intestinal mucosa injury after a burn.

探讨自噬介导的长链非编码RNA (lncRNA) H19在严重烧伤小鼠肠道中对表皮生长因子(EGF)的调控作用。C57BL/6J小鼠被三度烧伤至体表总面积的30%。采用雷帕霉素和3-甲基腺嘌呤(3-MA)激活和抑制自噬,Western blotting检测LC3和Beclin1水平的变化。采用qRT-PCR检测自噬对lncRNA H19的影响。采用腺病毒介导的lncRNA H19在IEC-6细胞中过表达,通过生物信息学分析、Western blotting和qRT-PCR评估lncRNA H19对EGF和let-7g的影响。采用let-7g mimic/inhibitor过表达/抑制let-7g,采用qRT-PCR和Western blotting检测let-7g对EGF的影响。LC3-II、Beclin1和lncRNA H19在雷帕霉素处理后肠组织和IEC-6细胞中的表达水平升高,而3-MA处理后表达水平逆转。烧伤后肠组织LC3-II、Beclin1和lncRNA H19水平升高,雷帕霉素处理后升高更为显著,而3-MA处理后则有所下降。lncRNA H19在IEC-6细胞中的过表达导致EGF和let-7g的表达水平分别升高和降低。此外,let-7g的过表达和抑制分别导致EGF的表达减少和增加。综上所述,严重烧伤后肠道自噬被激活,可提高lncRNA H19的转录水平。lncRNA H19可能通过let-7g调控肠黏膜烧伤后EGF的修复。
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引用次数: 5
Dihydromyricetin increases endothelial nitric oxide production and inhibits atherosclerosis through microRNA-21 in apolipoprotein E-deficient mice. 二氢杨梅素增加载脂蛋白e缺乏小鼠内皮细胞一氧化氮生成并通过microRNA-21抑制动脉粥样硬化。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-05-01 Epub Date: 2020-04-17 DOI: 10.1111/jcmm.15278
Dafeng Yang, Zhousheng Yang, Lei Chen, Dabin Kuang, Yang Zou, Jie Li, Xu Deng, Songyuan Luo, Jianfang Luo, Jun He, Miao Yan, Guixia He, Yang Deng, Rong Li, Qiong Yuan, Yangzhao Zhou, Pei Jiang, Shenglan Tan

Natural products were extracted from traditional Chinese herbal emerging as potential therapeutic drugs for treating cardiovascular diseases. This study examines the role and underlying mechanism of dihydromyricetin (DMY), a natural compound extracted from Ampelopsis grossedentata, in atherosclerosis. DMY treatment significantly inhibits atherosclerotic lesion formation, proinflammatory gene expression and the influx of lesional macrophages and CD4-positive T cells in the vessel wall and hepatic inflammation, whereas increases nitric oxide (NO) production and improves lipid metabolism in apolipoprotein E-deficient (Apoe-/- ) mice. Yet, those protective effects are abrogated by using NOS inhibitor L-NAME in Apoe-/- mice received DMY. Mechanistically, DMY decreases microRNA-21 (miR-21) and increases its target gene dimethylarginine dimethylaminohydrolase-1 (DDAH1) expression, an effect that reduces asymmetric aimethlarginine (ADMA) levels, and increases endothelial NO synthase (eNOS) phosphorylation and NO production in cultured HUVECs, vascular endothelium of atherosclerotic lesions and liver. In contrast, systemic delivery of miR-21 in Apoe-/- mice or miR-21 overexpression in cultured HUVECs abrogates those DMY-mediated protective effects. These data demonstrate that endothelial miR-21-inhibited DDAH1-ADMA-eNOS-NO pathway promotes the pathogenesis of atherosclerosis which can be rescued by DMY. Thus, DMY may represent a potential therapeutic adjuvant in atherosclerosis management.

从传统中草药中提取的天然产物成为治疗心血管疾病的潜在治疗药物。本研究探讨了二氢杨梅素(DMY)在动脉粥样硬化中的作用和潜在机制,二氢杨梅素是一种天然化合物,提取自藤蔓葡萄。DMY治疗显著抑制动脉粥样硬化病变形成、促炎基因表达、病变巨噬细胞和cd4阳性T细胞涌入血管壁和肝脏炎症,同时增加载脂蛋白e缺陷(Apoe-/-)小鼠一氧化氮(NO)的产生并改善脂质代谢。然而,使用NOS抑制剂L-NAME对Apoe-/-小鼠DMY的保护作用被取消。在机制上,DMY降低了microRNA-21 (miR-21)并增加了其靶基因二甲精氨酸二甲氨基水解酶-1 (DDAH1)的表达,从而降低了不对称aimetharginine (ADMA)水平,并增加了内皮NO合成酶(eNOS)磷酸化和NO的产生。相反,在Apoe-/-小鼠中系统递送miR-21或在培养的huvec中过表达miR-21会消除dmy介导的保护作用。这些数据表明内皮细胞mir -21抑制的DDAH1-ADMA-eNOS-NO通路促进了动脉粥样硬化的发病机制,而DMY可以挽救动脉粥样硬化。因此,DMY在动脉粥样硬化治疗中可能是一种潜在的辅助治疗手段。
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引用次数: 28
NGF from pancreatic stellate cells induces pancreatic cancer proliferation and invasion by PI3K/AKT/GSK signal pathway. 来自胰腺星状细胞的NGF通过PI3K/AKT/GSK信号通路诱导胰腺癌增殖和侵袭。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-05-01 Epub Date: 2020-04-15 DOI: 10.1111/jcmm.15265
Jie Jiang, Jun Bai, Tao Qin, Zheng Wang, Liang Han

Pancreatic cancer (PC) is a continuously high lethal disease, and the tumour microenvironment plays a pivotal role during PC progression. Herein, we focus on that the Nerve growth factor (NGF)/Tropomyosin-related kinase A (TrkA), in pancreatic stellate cells-pancreatic cancer cells (PSCs-PC cells) co-culture system, influences PC proliferation and invasion. The model of PC cells and PSCs was directly co-cultured in a no-touch manner, using the Transwell as the co-culture system. NGF and TrkA expression was measured in cultured system by real-time PCR, immunofluorescence, Western blotting analysis or ELISA. Small interfering RNA transfection was used to regulate the expression of TrkA in PC cells. The promotion of cancer invasion was investigated using Matrigel Transwell assay. In our study, NGF/TrkA is overexpressed in PSCs-PC cells co-culture system and promotes the invasion and proliferation of PC cells. And the epithelial-mesenchymal transition-related genes are influenced by si-TrkA. What's more, NGF/TrkA regulates the PC cell proliferation and invasion via activation of PI3K/AKT/GSK signalling. The present study demonstrated NGF/TrkA promoted the PC cell proliferation and invasion in the co-culture system by the activation of the PI3K/AKT/GSK signal cascade, providing a potential therapeutic target for PC patients.

胰腺癌是一种持续的高致死率疾病,肿瘤微环境在胰腺癌的发展过程中起着关键作用。本研究主要研究了胰腺星状细胞-胰腺癌细胞(PSCs-PC细胞)共培养体系中神经生长因子(NGF)/原肌球蛋白相关激酶A (TrkA)对胰腺癌增殖和侵袭的影响。使用Transwell作为共培养系统,将PC细胞与psc模型直接无接触共培养。采用实时荧光定量PCR、免疫荧光、Western blotting或ELISA检测培养体系中NGF和TrkA的表达。用小干扰RNA转染调节PC细胞中TrkA的表达。采用Matrigel Transwell实验研究其对肿瘤侵袭的促进作用。在我们的研究中,NGF/TrkA在PSCs-PC细胞共培养系统中过表达,促进PC细胞的侵袭和增殖。si-TrkA影响上皮-间质转化相关基因。此外,NGF/TrkA通过激活PI3K/AKT/GSK信号通路调控PC细胞的增殖和侵袭。本研究证实NGF/TrkA在共培养系统中通过激活PI3K/AKT/GSK信号级联促进PC细胞的增殖和侵袭,为PC患者提供了潜在的治疗靶点。
{"title":"NGF from pancreatic stellate cells induces pancreatic cancer proliferation and invasion by PI3K/AKT/GSK signal pathway.","authors":"Jie Jiang,&nbsp;Jun Bai,&nbsp;Tao Qin,&nbsp;Zheng Wang,&nbsp;Liang Han","doi":"10.1111/jcmm.15265","DOIUrl":"https://doi.org/10.1111/jcmm.15265","url":null,"abstract":"<p><p>Pancreatic cancer (PC) is a continuously high lethal disease, and the tumour microenvironment plays a pivotal role during PC progression. Herein, we focus on that the Nerve growth factor (NGF)/Tropomyosin-related kinase A (TrkA), in pancreatic stellate cells-pancreatic cancer cells (PSCs-PC cells) co-culture system, influences PC proliferation and invasion. The model of PC cells and PSCs was directly co-cultured in a no-touch manner, using the Transwell as the co-culture system. NGF and TrkA expression was measured in cultured system by real-time PCR, immunofluorescence, Western blotting analysis or ELISA. Small interfering RNA transfection was used to regulate the expression of TrkA in PC cells. The promotion of cancer invasion was investigated using Matrigel Transwell assay. In our study, NGF/TrkA is overexpressed in PSCs-PC cells co-culture system and promotes the invasion and proliferation of PC cells. And the epithelial-mesenchymal transition-related genes are influenced by si-TrkA. What's more, NGF/TrkA regulates the PC cell proliferation and invasion via activation of PI3K/AKT/GSK signalling. The present study demonstrated NGF/TrkA promoted the PC cell proliferation and invasion in the co-culture system by the activation of the PI3K/AKT/GSK signal cascade, providing a potential therapeutic target for PC patients.</p>","PeriodicalId":15215,"journal":{"name":"Journal of Cellular and Molecular Medicine","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/jcmm.15265","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37839613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 32
Inhibition of PHLPP1 ameliorates cardiac dysfunction via activation of the PI3K/Akt/mTOR signalling pathway in diabetic cardiomyopathy. 抑制PHLPP1可通过激活糖尿病心肌病患者的PI3K/Akt/mTOR信号通路改善心功能障碍。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-04-01 Epub Date: 2020-03-09 DOI: 10.1111/jcmm.15123
Mingjun Zhang, Xuyang Wang, Ming Liu, Dian Liu, Jinyu Pan, Jingjing Tian, Tao Jin, Yunfan Xu, Fengshuang An

Background: Pleckstrin homology (PH) domain leucine-rich repeat protein phosphatase 1 (PHLPP1) is a kind of serine/threonine phosphatase, whose dysregulation is accompanied with numerous human diseases. However, its role in diabetic cardiomyopathy remains unclear. We explored the underlying function and mechanism of PHLPP1 in diabetic cardiomyopathy (DCM).

Method: In vivo, Type 1 diabetic rats were induced by intraperitoneal injection of 60 mg/kg streptozotocin (STZ). Lentivirus-mediated short hairpin RNA (shRNA) was used to knock down the expression of PHLPP1. In vitro, primary neonatal rat cardiomyocytes and H9C2 cells were incubated in 5.5 mmol/L glucose (normal glucose, NG) or 33.3 mmol/L glucose (high glucose, HG). PHLPP1 expression was inhibited by PHLPP1-siRNA to probe into the function of PHLPP1 in high glucose-induced apoptosis in H9c2 cells.

Results: Diabetic rats showed up-regulated PHLPP1 expression, left ventricular dysfunction, increased myocardial apoptosis and fibrosis. PHLPP1 inhibition alleviated cardiac dysfunction. Additionally, PHLPP1 inhibition significantly reduced HG-induced apoptosis and restored PI3K/AKT/mTOR pathway activity in H9c2 cells. Furthermore, pretreatment with LY294002, an inhibitor of PI3K/Akt/mTOR pathway, abolished the anti-apoptotic effect of PHLPP1 inhibition.

Conclusion: Our study indicated that PHLPP1 inhibition alleviated cardiac dysfunction via activating the PI3K/Akt/mTOR signalling pathway in DCM. Therefore, PHLPP1 may be a novel therapeutic target for human DCM.

背景:Pleckstrin homology (PH) domain leucine-rich repeat protein phosphatase 1 (PHLPP1)是一种丝氨酸/苏氨酸磷酸酶,其失调伴随着许多人类疾病。然而,其在糖尿病性心肌病中的作用尚不清楚。我们探讨了PHLPP1在糖尿病性心肌病(DCM)中的潜在功能和机制。方法:采用腹腔注射链脲佐菌素(STZ) 60 mg/kg诱导1型糖尿病大鼠。利用慢病毒介导的短发夹RNA (shRNA)敲低PHLPP1的表达。体外培养新生大鼠心肌细胞和H9C2细胞,分别在5.5 mmol/L葡萄糖(正常葡萄糖,NG)和33.3 mmol/L葡萄糖(高糖,HG)条件下培养。利用PHLPP1- sirna抑制PHLPP1的表达,探讨PHLPP1在高糖诱导的H9c2细胞凋亡中的作用。结果:糖尿病大鼠PHLPP1表达上调,左心室功能障碍,心肌凋亡和纤维化增加。抑制PHLPP1可减轻心功能障碍。此外,PHLPP1抑制显著降低hg诱导的H9c2细胞凋亡,恢复PI3K/AKT/mTOR通路活性。此外,PI3K/Akt/mTOR通路抑制剂LY294002预处理可消除PHLPP1抑制的抗凋亡作用。结论:我们的研究表明,PHLPP1抑制通过激活DCM中PI3K/Akt/mTOR信号通路减轻心功能障碍。因此,PHLPP1可能是人类DCM的一个新的治疗靶点。
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引用次数: 21
MiR-3116 sensitizes glioma cells to temozolomide by targeting FGFR1 and regulating the FGFR1/PI3K/AKT pathway. MiR-3116 通过靶向 FGFR1 和调节 FGFR1/PI3K/AKT 通路,使胶质瘤细胞对替莫唑胺敏感。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-04-01 Epub Date: 2020-03-17 DOI: 10.1111/jcmm.15133
Shiqi Kong, Yingxiao Cao, Xin Li, Zhenzhong Li, Yuling Xin, Yan Meng

Glioma is a brain tumour that is often diagnosed, and temozolomide (TMZ) is a common chemotherapeutic drug used in glioma. Yet, resistance to TMZ is a chief hurdle towards curing the malignancy. The current work explores the pathways and involvement of miR-3116 in the TMZ resistance. miR-3116 and FGFR1 mRNA were quantified by real-time PCR in malignant samples and cell lines. Appropriate assays were designed for apoptosis, viability, the ability to form colonies and reporter assays to study the effects of the miR-3116 or FGFR1. The involvement of PI3K/AKT signalling was assessed using Western blotting. Tumorigenesis was evaluated in an appropriate xenograft mouse model in vivo. This work revealed that the levels of miR-3116 dipped in samples resistant to TMZ, while increased miR-3116 caused an inhibition of the tumour features mentioned above to hence augment TMZ sensitivity. miR-3116 was found to target FGFR1. When FGFR1 was overexpressed, resistance to TMZ was augmented and reversed the sensitivity caused by miR-3116. Our findings further confirmed PI3K/AKT signalling pathway is involved in this action. In conclusion, miR-3116 sensitizes glioma cells to TMZ through FGFR1 downregulation and the PI3K/AKT pathway inactivation. Our results provide a strategy to overcome TMZ resistance in glioma treatment.

胶质瘤是一种经常被诊断出的脑肿瘤,替莫唑胺(TMZ)是胶质瘤常用的化疗药物。然而,对替莫唑胺的耐药性是治愈这种恶性肿瘤的主要障碍。目前的研究探讨了 miR-3116 参与 TMZ 抗药性的途径。为研究 miR-3116 或 FGFR1 的影响,设计了适当的凋亡、存活率、形成菌落的能力和报告试验。使用 Western 印迹法评估了 PI3K/AKT 信号的参与情况。在适当的体内异种移植小鼠模型中对肿瘤发生进行了评估。这项研究发现,在对 TMZ 有抗药性的样本中,miR-3116 的水平有所下降,而 miR-3116 的增加会抑制上述肿瘤特征,从而增强对 TMZ 的敏感性。当 FGFR1 过表达时,对 TMZ 的耐药性增强,并逆转了 miR-3116 导致的敏感性。我们的研究结果进一步证实,PI3K/AKT 信号通路参与了这一作用。总之,miR-3116 通过 FGFR1 下调和 PI3K/AKT 通路失活使胶质瘤细胞对 TMZ 敏感。我们的研究结果为克服胶质瘤治疗中的 TMZ 耐药性提供了一种策略。
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引用次数: 0
Increased production of functional small extracellular vesicles in senescent endothelial cells. 衰老内皮细胞中功能性小细胞外囊泡的产生增加。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-04-01 Epub Date: 2020-02-26 DOI: 10.1111/jcmm.15047
Jaime A Riquelme, Kaloyan Takov, Concepción Santiago-Fernández, Xavier Rossello, Sergio Lavandero, Derek M Yellon, Sean M Davidson

Small extracellular vesicles (EVs) are novel players in vascular biology. However, a thorough understanding of their production and function remains elusive. Endothelial senescence is a key feature of vascular ageing and thus, is an attractive therapeutic target for the treatment of vascular disease. In this study, we sought to characterize the EV production of senescent endothelial cells. To achieve this, Human Umbilical Vascular Endothelial Cells (HUVECs) were replicated until they reached senescence, as determined by measurement of Senescence-Associated β-Galactosidase activity via microscopy and flow cytometry. Expression of the endosomal marker Rab7 and the EV marker CD63 was determined by immunofluorescence. Small EVs were isolated by ultracentrifugation and characterized using electron microscopy, nanoparticle tracking analysis and immunoassays to assess morphology, size, concentration and expression of exosome markers CD9 and CD81. Migration of HUVECs in response to EVs was studied using a transwell assay. The results showed that senescent endothelial cells express higher levels of Rab7 and CD63. Moreover, senescent endothelial cells produced higher levels of CD9- and CD81-positive EVs. Additionally, small EVs from both young and senescent endothelial cells promoted HUVEC migration. Overall, senescent endothelial cells produce an increased number of functional small EVs, which may have a role in vascular physiology and disease.

小细胞外囊泡(EVs)是血管生物学中的新成员。然而,对它们的产生和功能的彻底了解仍然是难以捉摸的。内皮细胞衰老是血管老化的一个关键特征,因此是治疗血管疾病的一个有吸引力的治疗靶点。在这项研究中,我们试图表征衰老内皮细胞的EV生产。为了实现这一目标,通过显微镜和流式细胞术测量衰老相关β-半乳糖苷酶活性,人类脐血管内皮细胞(HUVECs)被复制,直到它们达到衰老。免疫荧光法检测内体标记物Rab7和EV标记物CD63的表达。通过超离心分离小ev,利用电镜、纳米颗粒跟踪分析和免疫分析对其进行表征,评估外泌体标志物CD9和CD81的形态、大小、浓度和表达。利用transwell实验研究了HUVECs对ev的迁移反应。结果表明,衰老内皮细胞表达Rab7和CD63水平升高。此外,衰老的内皮细胞产生更高水平的CD9-和cd81阳性ev。此外,来自年轻和衰老内皮细胞的小ev促进了HUVEC的迁移。总的来说,衰老的内皮细胞产生更多的功能性小EVs,这可能在血管生理和疾病中起作用。
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引用次数: 30
Inhibition of Interleukin-6/glycoprotein 130 signalling by Bazedoxifene ameliorates cardiac remodelling in pressure overload mice. 巴泽多昔芬抑制白介素-6/糖蛋白130信号传导改善压力过载小鼠心脏重构
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-04-01 Epub Date: 2020-03-12 DOI: 10.1111/jcmm.15147
Wei Shi, Haiyan Ma, Tianshu Liu, Dan Yan, Pengcheng Luo, Maocai Zhai, Jingwen Tao, Shengqi Huo, Junyi Guo, Chenglong Li, Jiayuh Lin, Cuntai Zhang, Sheng Li, Jiagao Lv, Li Lin

The role of IL-6 signalling in hypertensive heart disease and its sequelae is controversial. Our group demonstrated that Bazedoxifene suppressed IL-6/gp130 signalling in cancer cells but its effect on myocardial pathology induced by pressure overload is still unknown. We explored whether Bazedoxifene could confer benefits in wild-type C57BL/6J mice suffering from transverse aortic constriction (TAC) and the potential mechanisms in H9c2 myoblasts. Mice were randomized into three groups (Sham, TAC, TAC+Bazedoxifene, n = 10). Morphological and histological observations suggested TAC aggravated myocardial remodelling while long-term intake of Bazedoxifene (5 mg/kg, intragastric) attenuated pressure overload-induced pathology. Echocardiographic results indicated Bazedoxifene rescued cardiac function in part. We found Bazedoxifene decreased the mRNA expression of IL-6, MMP2, Col1A1, Col3A1 and periostin in murine hearts after 8-week surgery. By Western blot detection, we found Bazedoxifene exhibited an inhibition of STAT3 activation in mice three hours and 8 weeks after TAC. Acute TAC stress (3 hours) led to down-regulated ratio of LC3-Ⅱ/LC3-Ⅰ, while in mice after long-term (8 weeks) TAC this ratio becomes higher than that in Sham mice. Bazedoxifene inverted the autophagic alteration induced by TAC at both two time-points. In H9c2 myoblasts, Bazedoxifene suppressed the IL-6-induced STAT3 activation. Moreover, IL-6 reduced the ratio of LC3-Ⅱ/LC3-Ⅰ, promoted P62 expression but Bazedoxifene reversed both changes in H9c2 cells. Our data suggested Bazedoxifene inhibited IL-6/gp130 signalling and protected against cardiac remodelling together with function deterioration in TAC mice.

IL-6信号在高血压性心脏病及其后遗症中的作用尚存争议。我们的研究小组证明,巴泽多昔芬抑制癌细胞中的IL-6/gp130信号传导,但其对压力过载引起的心肌病理的影响尚不清楚。我们探讨了巴泽多昔芬是否能对患有横断主动脉缩窄(TAC)的野生型C57BL/6J小鼠有益,以及对H9c2成肌细胞的潜在机制。小鼠随机分为Sham、TAC、TAC+巴泽多西芬组,n = 10。形态学和组织学观察表明,TAC加重了心肌重构,而长期摄入巴泽多昔芬(5 mg/kg,灌胃)可减轻压力超载引起的病理。超声心动图结果提示贝塞多昔芬部分恢复心功能。我们发现,手术8周后,巴泽多昔芬降低了小鼠心脏中IL-6、MMP2、Col1A1、Col3A1和骨膜蛋白的mRNA表达。通过Western blot检测,我们发现在TAC后3小时和8周,巴泽多昔芬对小鼠STAT3的激活有抑制作用。急性TAC应激(3小时)导致LC3-Ⅱ/LC3-Ⅰ的比值下调,而长期(8周)TAC小鼠的比值高于Sham小鼠。巴泽多昔芬在两个时间点均可逆转TAC诱导的自噬改变。在H9c2成肌细胞中,巴泽多昔芬抑制il -6诱导的STAT3激活。此外,IL-6降低了LC3-Ⅱ/LC3-Ⅰ的比例,促进了P62的表达,但在H9c2细胞中,巴泽多昔芬逆转了这两种变化。我们的数据表明,巴泽多昔芬抑制IL-6/gp130信号传导,防止TAC小鼠心脏重构和功能恶化。
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引用次数: 15
Coronary artery bypass grafting is associated with immunoparalysis of monocytes and dendritic cells. 冠状动脉旁路移植术与单核细胞和树突状细胞的免疫分析有关。
IF 5.3 2区 医学 Q1 Biochemistry, Genetics and Molecular Biology Pub Date : 2020-04-01 Epub Date: 2020-03-17 DOI: 10.1111/jcmm.15154
Alexis J Perros, Arlanna Esguerra-Lallen, Kelly Rooks, Fenny Chong, Sanne Engkilde-Pedersen, Helen M Faddy, Elise Hewlett, Rishendran Naidoo, John-Paul Tung, John F Fraser, Peter Tesar, Marc Ziegenfuss, Susan Smith, Donalee O'Brien, Robert L Flower, Melinda M Dean

Coronary artery bypass grafting (CABG) triggers a systemic inflammatory response that may contribute to adverse outcomes. Dendritic cells (DC) and monocytes are immunoregulatory cells potentially affected by CABG, contributing to an altered immune state. This study investigated changes in DC and monocyte responses in CABG patients at 5 time-points: admission, peri-operative, ICU, day 3 and day 5. Whole blood from 49 CABG patients was used in an ex vivo whole blood culture model to prospectively assess DC and monocyte responses. Lipopolysaccharide (LPS) was added in parallel to model responses to an infectious complication. Co-stimulatory and adhesion molecule expression and intracellular mediator production was measured by flow cytometry. CABG modulated monocyte and DC responses. In addition, DC and monocytes were immunoparalysed, evidenced by failure of co-stimulatory and adhesion molecules (eg HLA-DR), and intracellular mediators (eg IL-6) to respond to LPS stimulation. DC and monocyte modulation was associated with prolonged ICU length of stay and post-operative atrial fibrillation. DC and monocyte cytokine production did not recover by day 5 post-surgery. This study provides evidence that CABG modulates DC and monocyte responses. Using an ex vivo model to assess immune competency of CABG patients may help identify biomarkers to predict adverse outcomes.

冠状动脉旁路移植术(CABG)会引发全身炎症反应,可能导致不良后果。树突状细胞(DC)和单核细胞是免疫调节细胞,可能受到 CABG 的影响,导致免疫状态改变。本研究调查了 CABG 患者在入院、围手术期、重症监护室、第 3 天和第 5 天这 5 个时间点上 DC 和单核细胞反应的变化。49 名 CABG 患者的全血被用于体外全血培养模型,以前瞻性地评估 DC 和单核细胞的反应。同时加入脂多糖(LPS)以模拟对感染性并发症的反应。通过流式细胞术测量共刺激分子和粘附分子的表达以及细胞内介质的产生。CABG 可调节单核细胞和直流电反应。此外,还对直流电和单核细胞进行了免疫分析,结果表明共刺激分子和粘附分子(如 HLA-DR)以及细胞内介质(如 IL-6)对 LPS 刺激没有反应。直流和单核细胞调节与重症监护室住院时间延长和术后心房颤动有关。直流电和单核细胞细胞因子的产生在术后第 5 天没有恢复。本研究提供了 CABG 可调节 DC 和单核细胞反应的证据。使用体外模型评估 CABG 患者的免疫能力可能有助于确定预测不良后果的生物标志物。
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引用次数: 0
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