signaling pathways

信号通路
  • 文章类型: Journal Article
    先前已经在几项研究中分析了不同麻醉剂的促转移和抗肿瘤作用,结果相互矛盾。因此,麻醉药介导的潜在影响肿瘤表型和转移的围手术期分子机制尚不清楚.据推测,麻醉剂特异性长链非编码RNA(lncRNA)表达变化在血液循环中被诱导,并在肿瘤预后中起关键作用。在本研究中,进行了高通量测序和定量PCR,以鉴定受两种治疗方案影响的lncRNA和mRNA表达变化,全凭静脉麻醉(TIVA)和挥发性麻醉气体(VAG)应用于结直肠癌(CRC)切除术。在切除之前和之后分离总血液RNA,并使用RNA测序表征。使用生物信息学分析鉴定了mRNA‑lncRNA相互作用及其在差异表达lncRNA的癌症相关信号传导中的作用。这两个时间点的比较揭示了TIVA组中35种差异表达的lncRNAs,在VAG组中有25人,而两组共有8个。TIVA组中的两个lncRNAs,在本研究的NGS数据集中,VAG组中的23个被确认为差异调节的目标mRNA。进行通路分析并鉴定用于TIVA的癌症相关规范通路。VAG的Target-mRNA分析显示针对癌症的免疫反应明显恶化。在这个概念验证研究中,在血液中lncRNA和mRNA谱的麻醉特异性表达变化被成功鉴定。此外,本研究的数据提供了第一个证据,证明麻醉诱导的lncRNA模式变化可能进一步影响肿瘤切除后观察到的CRC结局差异.
    Prometastatic and antitumor effects of different anesthetics have been previously analyzed in several studies with conflicting results. Thus, the underlying perioperative molecular mechanisms mediated by anesthetics potentially affecting tumor phenotype and metastasis remain unclear. It was hypothesized that anesthetic‑specific long non‑coding RNA (lncRNA) expression changes are induced in the blood circulation and play a crucial role in tumor outcome. In the present study, high‑throughput sequencing and quantitative PCR were performed in order to identify lncRNA and mRNA expression changes affected by two therapeutic regimes, total intravenous anesthesia (TIVA) and volatile anesthetic gas (VAG) in patients undergoing colorectal cancer (CRC) resection. Total blood RNA was isolated prior to and following resection and characterized using RNA sequencing. mRNA‑lncRNA interactions and their roles in cancer‑related signaling of differentially expressed lncRNAs were identified using bioinformatics analyses. The comparison of these two time points revealed 35 differentially expressed lncRNAs in the TIVA‑group, and 25 in the VAG‑group, whereas eight were shared by both groups. Two lncRNAs in the TIVA‑group, and 23 in the VAG‑group of in silico identified target‑mRNAs were confirmed as differentially regulated in the NGS dataset of the present study. Pathway analysis was performed and cancer relevant canonical pathways for TIVA were identified. Target‑mRNA analysis of VAG revealed a markedly worsened immunological response against cancer. In this proof‑of‑concept study, anesthesic‑specific expression changes in lncRNA and mRNA profiles in blood were successfully identified. Moreover, the data of the present study provide the first evidence that anesthesia‑induced lncRNA pattern changes may contribute further in the observed differences in CRC outcome following tumor resection.
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  • 文章类型: Case Reports
    在这项研究中,我们报道了一例29岁非裔美国男性的晚期斜坡脊索瘤病例,该病例自初次诊断以来出现了不幸的线性进展过程.在他于2020年初次接触时,放射治疗并没有提供任何有希望的治疗结果。他最初接受了部分切除的联合治疗,辐射,并建议口服伊马替尼,这些都没有改变他疾病的自然史和进展。相反,这些方法作为姑息措施进行,以减少肿瘤的当前大小和降低生长速率,从而最大限度地减少他的疼痛.由于患者的社会经济障碍,社会问题在他的预后中起着重要的作用,他无法继续寻求可用的放射治疗,导致疾病恶化。他的后续行动注意到依从性差。受这种疾病影响的风险可能是多因素的,需要增加更多此类病例的报告来弥合目前文献中的这一差距。此外,目前对在不同种族群体和生命最初几十年的患者中发现的此类肿瘤的报告的研究存在差距。回顾了新的治疗策略,预计他们可以产生自信的治疗指南。
    In this study, we report a case of a late-stage clival chordoma in a 29-year-old African American male and the unfortunate linear progression course since his initial diagnosis. Upon his initial encounter in 2020, radiation therapy did not offer any promising curative outcome. He was initially treated with a combination treatment of partial resection, radiation, and proposed oral imatinib, none of which modified the natural history and progression of his illness. Instead, these methods were performed as palliative measures to reduce the current size of the tumors and decrease growth rates to minimize his pain. Social issues acted as a contributory risk factor in his prognosis and due to the patient\'s socioeconomic barriers, he was not able to continue seeking available radiotherapy, leading to disease exacerbation. Poor adherence was noted with his follow-up. The risks of being affected by this disease are likely multifactorial and more reports of such cases need to be added to bridge this gap in the current literature. In addition, there is a gap in the current study of reports of such tumors found in diverse racial groups and in patients who are in their first few decades of life. Novel treatment strategies were reviewed, and it is expected they could generate assertive treatment guidelines.
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  • 文章类型: Journal Article
    The use of direct-acting antivirals (DAAs) therapy for the treatment of hepatitis C virus (HCV) results in a high-sustained virological response (SVR) and subsequently alters liver immunologic environment. However, hepatocellular carcinoma (HCC) may occur after DAAs treatment. We aimed to clarify changes of immune responses, PI3K/AKT and JAK/STAT signaling pathways in HCV-induced liver diseases and HCC following DAAs treatment. Four cohorts were classified as chronic HCV patients, HCV-related cirrhosis without HCC, HCV-related cirrhosis and HCC, and healthy control group. The patient groups were further divided into treated or untreated with DAAs with SVR12. Increased percentages of CD3, CD8 and CD4, decreased CD4/FoxP3/CD25, CD8/PD-1 and CD19/PDL-1 were found in DAAs-treated patients in the three HCV groups. Following DAAs therapy, the levels of ROS, IL-1β, IL-6, IL-8 and TNF-α were significantly decreased in the three HCV groups. Treated HCV patients showed up regulation of p-AKT and p-STAT5 and down regulation of p-STAT3, HIF-1α and COX-2. In conclusion, DAAs enhance the immune response in chronic HCV and liver cirrhosis, hence our study is the first to show change in PI3K/AKT and JAK/STAT signaling pathways in different HCV-induced liver diseases after DAAs. In chronic HCV, DAAs have better impact on the immune response while in liver cirrhosis not all immune changes were prominent.
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  • 文章类型: Journal Article
    Recent landmark publications from our research group outline a transformative approach to defining, studying and treating amyotrophic lateral sclerosis (ALS). Rather than approaching ALS as a single entity, we advocate targeting therapies to distinct \"clusters\" of patients based on their specific genomic and molecular features. Our findings point to the existence of a molecular taxonomy for ALS, bringing us a step closer to the establishment of a precision medicine approach in neurology practice.
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  • 文章类型: Journal Article
    BACKGROUND: Bacterial invasive infection and host immune response is fundamental to the understanding of pathogen pathogenesis and the discovery of effective therapeutic drugs. However, there are very few experimental studies on the signaling cross-talks between bacteria and human host to date.
    METHODS: In this work, taking M. tuberculosis H37Rv (MTB) that is co-evolving with its human host as an example, we propose a general computational framework that exploits the known bacterial pathogen protein interaction networks in STRING database to predict pathogen-host protein interactions and their signaling cross-talks. In this framework, significant interlogs are derived from the known pathogen protein interaction networks to train a predictive l2-regularized logistic regression model.
    RESULTS: The computational results show that the proposed method achieves excellent performance of cross validation as well as low predicted positive rates on the less significant interlogs and non-interlogs, indicating a low risk of false discovery. We further conduct gene ontology (GO) and pathway enrichment analyses of the predicted pathogen-host protein interaction networks, which potentially provides insights into the machinery that M. tuberculosis H37Rv targets human genes and signaling pathways. In addition, we analyse the pathogen-host protein interactions related to drug resistance, inhibition of which potentially provides an alternative solution to M. tuberculosis H37Rv drug resistance.
    CONCLUSIONS: The proposed machine learning framework has been verified effective for predicting bacteria-host protein interactions via known bacterial protein interaction networks. For a vast majority of bacterial pathogens that lacks experimental studies of bacteria-host protein interactions, this framework is supposed to achieve a general-purpose applicability. The predicted protein interaction networks between M. tuberculosis H37Rv and Homo sapiens, provided in the Additional files, promise to gain applications in the two fields: (1) providing an alternative solution to drug resistance; (2) revealing the patterns that M. tuberculosis H37Rv genes target human immune signaling pathways.
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  • 文章类型: Journal Article
    BACKGROUND: Hollow spaces in the jawbone have been defined as fatty degenerative osteonecrosis of jawbone (FDOJ) and have been linked with a dysregulated immune system. Little is known about the underlying relationship.
    OBJECTIVE: Samples of FDOJ were analyzed to assess expression of cytokines which can play a role in the pathogenesis of breast cancer (MaCa).
    METHODS: Samples of FDOJ extracted from 23 patients with MaCa and 19 healthy control jawbone samples were analyzed for 7 immune messengers.
    RESULTS: RANTES was found to be highly overexpressed in disease samples. No change was observed in expression levels of the other immune mediators.
    CONCLUSIONS: This data provides a compelling confirmation that FDOJ produces high levels of RANTES, a cytokine implicated in MaCa and metastasis. Levels detected in FDOJ are five-fold higher than that previously reported for MaCa tissue suggesting its role as a cytokine source in MaCa.
    CONCLUSIONS: We thus hypothesize that FDOJ may serve as an expeditor of MaCa progression, through RANTES production.
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