Hepatic cancer

肝癌
  • 文章类型: Journal Article
    由于肝癌的发病率和死亡率在全球范围内持续增长,有必要开发仿生肿瘤模型,用于药物开发和肿瘤治疗。细胞球体作为一种出色的简单3D模型,可以弥合2D细胞培养和活组织之间的差距。在这项研究中,我们提出了一种基于生物甲基丙烯酸酯明胶(GelMA)水凝胶的微平台,用于肝细胞球体的大量生成和耐药性的下游研究。通过微成型制造策略,可以在标准24培养孔板中轻松实现具有可调阵列的微图案化GelMA水凝胶微孔芯片(GHM芯片)。制造的GHM芯片在限定的形貌内诱导多细胞自组装行为,并进一步形成球状结构。通过调节细胞接种密度和设计微孔尺寸,均匀的肝癌球体与可调直径在一个简单的获得,稳定可控。此外,通过从GHM芯片中无损回收球体,完成了抗癌药物的筛选化疗研究。除此之外,回收的功能性球体在肿瘤生物学等生物医学领域具有潜在的应用价值,药理学,和组织微工程。最后,拟议的GHM芯片并入标准细胞培养板,具有易于制造和操作的特性,可能是癌症研究应用的有效培养微平台。
    Since hepatic cancer incidence and mortality continue to grow worldwide, it is necessary to develop the biomimetic tumor models for drug development and tumor therapeutics. Cellular spheroids as an excellent simple 3D model can bridge the gap between 2D cell culture and live tissue. In this study, we proposed a biological methacrylated gelatin (GelMA) hydrogel-based microplatform for the massive generation of hepatocellular spheroids and downstream investigation of drug resistance. Micropatterned GelMA hydrogel microwell chip (GHM-chip) with tunable array was easily achieved in standard 24-culture well plates through the micro-molding fabrication strategy. The fabricated GHM-chip induced multicellular self-assembly behavior within the defined topography and further formed spheroidal structure. By regulating cell seeding density and designing microwell size, uniform hepatic cancer spheroids with tunable diameters were obtained in a simplicity, stability and controllable manner. In addition, the screening chemotherapy study of anti-cancer drug was completed through non-destructive recovery of spheroids from the GHM-chip. Beyond that, the recovered functional spheroids have potential application value in various biomedical fields such as tumor biology, pharmacology, and tissue microengineering. Finally, the proposed GHM-chip incorporated into standard cell culture plates with easy to manufacture and operate properties, may be an efficient culture microplatform for cancer research applications.
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  • 文章类型: Journal Article
    观察性研究和临床试验表明,免疫细胞之间存在关联,炎症因子,血清代谢物,还有肝癌.然而,这些因素与肝癌之间的因果关系仍有待确定。
    为了探索免疫细胞之间的因果关系,炎症因子,血清代谢物,还有肝癌.
    本研究利用公开的遗传数据(GWAS)采用孟德尔双样本随机化(MR)来分析731个免疫细胞性状之间的因果关系,91个炎症因子,1400种血清代谢物,还有肝癌.主要分析使用逆方差加权(IVW)MR,进行额外的敏感性测试,以评估因果关系的有效性。
    对异质性和水平多效性进行校正后,在探索免疫细胞群与肝癌之间的因果关系时,我们发现终末分化CD4-CD8-T细胞%T细胞与肝癌呈负相关,作为保护因素,而效应记忆CD4-CD8-T细胞%CD4-CD8-T细胞与肝癌呈正相关,作为一个风险因素。在研究炎症因子与肝癌之间的因果关系时,C-C基序趋化因子19水平与肝癌呈正相关,代表一个风险因素,而白细胞介素-10水平与肝癌呈负相关,作为保护因素。关于血清代谢物与肝癌之间的因果关系,(N(1)N(8))-乙酰亚精胺水平与肝癌呈负相关,作为保护因素,而1-(1-烯基-棕榈酰)-GPC(p-16:0)水平与肝癌呈正相关,作为一个风险因素。
    我们的MR分析表明免疫细胞之间的因果关系,炎症因子,血清代谢物,还有肝癌.然而,需要进一步验证来评估这些免疫细胞的潜力,炎症因子,和血清代谢物作为肝癌的预防或治疗靶标。
    UNASSIGNED: Observational studies and clinical trials suggest associations between immune cells, inflammatory factors, serum metabolites, and hepatic cancer. However, the causal relationships between these factors and hepatic cancer remain to be established.
    UNASSIGNED: To explore the causal relationships between immune cells, inflammatory factors, serum metabolites, and hepatic cancer.
    UNASSIGNED: This study employed comprehensive two-sample Mendelian randomization (MR) utilizing publicly available genetic data (GWAS) to analyze causal relationships between 731 immune cell traits, 91 inflammatory factors, 1400 serum metabolites, and hepatic cancer. The primary analysis used inverse variance-weighted (IVW) MR, with additional sensitivity tests to assess the validity of causal relationships.
    UNASSIGNED: After correction for heterogeneity and horizontal pleiotropy, in exploring the causal relationships between immune cell groups and hepatic cancer, we found that Terminally Differentiated CD4-CD8- T cell %T cell was negatively associated with hepatic cancer, serving as a protective factor, while Effector Memory CD4-CD8- T cell %CD4-CD8- T cell was positively associated with hepatic cancer, acting as a risk factor. In investigating the causal relationships between inflammatory factors and hepatic cancer, C-C motif chemokine 19 levels were positively associated with hepatic cancer, representing a risk factor, while Interleukin-10 levels were negatively associated with hepatic cancer, acting as a protective factor. Regarding the causal relationships between serum metabolites and hepatic cancer, (N(1) + N(8))-acetylspermidine levels were negatively associated with hepatic cancer, serving as a protective factor, while 1-(1-enyl-palmitoyl)-GPC (p-16:0) levels were positively associated with hepatic cancer, acting as a risk factor.
    UNASSIGNED: Our MR analysis indicates causal relationships between immune cells, inflammatory factors, serum metabolites, and hepatic cancer. However, further validation is needed to assess the potential of these immune cells, inflammatory factors, and serum metabolites as preventive or therapeutic targets for hepatic cancer.
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  • 文章类型: Journal Article
    背景:肝细胞癌(HCC)在癌症发病率方面全球排名第六,死亡率排名第三。不幸的是,超过70%的肝癌患者放弃了治愈性手术或肝移植的机会,由于体检不足,身体状况差,诊断后器官的可用性有限。临床指南认可经动脉化疗栓塞(TACE)作为中晚期HCC的一线治疗。冷冻消融(CRA)是一种新兴的局部消融疗法,越来越多地用于HCC管理。最近的研究表明,CRA与TACE的结合提供了互补和协同作用,有可能提高长期生存率。然而,对于等于或超过5cm的HCC病变,TACE+CRA联合治疗比TACE单独治疗的优越性需要进一步研究.
    目的:比较TACE联合CRA与单纯TACE治疗直径≥5cmHCC的疗效和安全性。
    方法:PubMed,EMBASE,科克伦图书馆,CNKI,万方,和VIP数据库进行检索,以检索截至2022年7月所有关于TACE和CRA的相关研究。采用RevMan5.3软件进行Meta分析。
    结果:根据纳入和排除标准进行筛选后,包括6篇文章,包括2项随机对照试验和4项非随机对照试验,共有575例患者纳入荟萃分析.结果表明,客观反应率[优势比(OR)=2.56,95%置信区间(CI):1.66-3.96,P<0.0001),疾病控制率(OR=3.03,95CI:1.88-4.89,P<0.00001),1年生存率(OR=3.79,95CI:2.50-5.76,P<0.00001),2年生存率(OR=2.34,95CI:1.43-3.85,P=0.0008),3年生存率(OR=3.34,95CI:1.61~6.94,P=0.001)均优于对照组;术后甲胎蛋白值降低(OR=295.53,95CI:250.22~340.85,P<0.0001),术后CD4值升高(OR=10.59,95CI:8.78~12.40,P<0.00001),术后CD8值下降(OR=6.47,95CI:4.44~8.50,P<0.00001)也明显高于单纯TACE治疗组。
    结论:与单纯TACE治疗相比,TACE+CRA联合治疗不仅能改善直径≥5cm的HCC患者的免疫功能,而且还提高了治疗效果和长期生存率,不会增加并发症的风险。因此,对于直径≥5cm的HCC患者,TACE+CRA联合治疗可能是更推荐的治疗方法。
    BACKGROUND: Hepatocellular carcinoma (HCC) ranks sixth globally in cancer incidence and third in mortality rates. Unfortunately, over 70% of HCC patients forego the opportunity for curative surgery or liver transplantation due to inadequate physical examinations, poor physical condition, and limited organ availability upon diagnosis. Clinical guidelines endorse transarterial chemoembolization (TACE) as the frontline treatment for intermediate to advanced-stage HCC. Cryoablation (CRA) is an emerging local ablative therapy increasingly used in HCC management. Recent studies suggest that combining CRA with TACE offers complementary and synergistic effects, potentially improving long-term survival rates. However, the superiority of combined TACE + CRA therapy over TACE alone for HCC lesions equal to or exceeding 5 cm requires further investigation.
    OBJECTIVE: To compare the efficacy and safety of TACE combined with CRA vs TACE alone in the treatment of HCC with a diameter of ≥ 5 cm.
    METHODS: PubMed, EMBASE, Cochrane Library, CNKI, Wanfang, and VIP databases were searched to retrieve all relevant studies on TACE and CRA up to July 2022. Meta-analysis was performed using RevMan 5.3 software.
    RESULTS: After screening according to the inclusion and exclusion criteria, 6 articles were included, including 2 randomized controlled trials and 4 nonrandomized controlled trials, with a total of 575 patients included in the meta-analysis. The results showed that the objective response rate [odds ratio (OR) = 2.56, 95% confidence interval (CI):1.66-3.96, P < 0.0001), disease control rate (OR = 3.03, 95%CI: 1.88-4.89, P < 0.00001), 1-year survival rate (OR = 3.79, 95%CI: 2.50-5.76, P < 0.00001), 2-year survival rate (OR = 2.34, 95%CI: 1.43-3.85, P = 0.0008), and 3-year survival rate (OR = 3.34, 95%CI: 1.61-6.94, P = 0.001) were all superior to those of the control group; the postoperative decrease in alpha-fetoprotein value (OR = 295.53, 95%CI: 250.22-340.85, P < 0.0001), the postoperative increase in CD4 value (OR = 10.59, 95%CI: 8.78-12.40, P < 0.00001), and the postoperative decrease in CD8 value (OR = 6.47, 95%CI: 4.44-8.50, P < 0.00001) were also significantly higher than those in the TACE-alone treatment group.
    CONCLUSIONS: Compared with TACE-alone treatment, TACE + CRA combined treatment not only improves the immune function of HCC patients with a diameter of ≥ 5 cm, but also enhances the therapeutic efficacy and long-term survival rate, without increasing the risk of complications. Therefore, TACE + CRA combined treatment may be a more recommended treatment for patients with HCC with a diameter of ≥ 5 cm.
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  • 文章类型: Journal Article
    背景:慢性炎症已被证明可促进癌症进展。酒渣鼻确实是一种长期的炎症性皮肤病,据报道与几种恶性肿瘤的风险增加有关。但是缺乏因果关系的证据。
    目的:为了系统地估计酒渣鼻与几种癌症之间的因果关系,包括皮肤恶性黑色素瘤(CMM),皮肤鳞状细胞癌(cSCC),基底细胞癌(BCC),光化性角化病(AK),甲状腺癌,乳腺癌,胶质瘤和肝癌,以及探索潜在的潜在发病机制。
    方法:我们进行了一项双向双样本孟德尔随机化研究,以探讨酒渣鼻与几种癌症之间的潜在因果关系。使用与酒渣鼻和癌症相关的全基因组显著单核苷酸多态性建立仪器变量。因果关系的评估是通过多种方法进行的,并通过敏感性分析评估结果的稳健性。
    结果:没有明显的迹象表明酒渣鼻对CMM的因果关系(pivw=0.71),cSCC(枢轴=0.45),BCC(枢轴=0.90),AK(pivw=0.73),甲状腺癌(pivw=0.59),胶质瘤(枢轴=0.15),和肝癌(pivw=0.07),但是酒渣鼻的遗传风险与人类表皮生长因子受体(HER)阴性乳腺癌的易感性增加有关(优势比[OR],1.10;95%置信区间[CI],1.02-1.18;枢轴=0.01)。TANK(TRAF家族成员相关的核因子κB(NFKB)激活剂)被鉴定为两种酒渣鼻的共同保护基因(OR,0.90;95%CI,0.82-0.99;pivw=0.048)和HER阴性乳腺恶性肿瘤(OR,0.86;95%CI,0.75-0.98;枢轴=0.032),主要富含NF-κB信号转导的负调节,可能有助于酒渣鼻与乳腺癌这种亚型之间的遗传联系。
    结论:我们的研究结果为酒渣鼻和HER阴性的乳腺恶性肿瘤风险之间的因果关系提供了暗示性证据。
    BACKGROUND: Chronic inflammation has been shown to promote cancer progression. Rosacea is indeed a long-term inflammatory skin condition and had been reported to link with increased risk for several types of malignancies, but evidence for causality is lacking.
    OBJECTIVE: To systematically estimate the causal relationship between rosacea and several types of cancer, including cutaneous malignant melanoma (CMM), cutaneous squamous cell carcinoma (cSCC), basal cell carcinoma (BCC), actinic keratosis (AK), thyroid cancer, breast cancer, glioma and hepatic cancer, as well as explore the potential underlying pathogenesis.
    METHODS: We conducted a bidirectional two-sample Mendelian randomization study to probe the potential causal relationships between rosacea and several types of cancer. Instrumental variables were established using genome-wide significant single nucleotide polymorphisms associated with rosacea and cancers. The assessment of causality was carried out through multiple methods, and the robustness of the results was evaluated via sensitivity analyses.
    RESULTS: There was no significant indication of causal effects of rosacea on CMM (pivw = 0.71), cSCC (pivw = 0.45), BCC (pivw = 0.90), AK (pivw = 0.73), thyroid cancer (pivw = 0.59), glioma (pivw = 0.15), and hepatic cancer (pivw = 0.07), but the genetic risk of rosacea was associated with an increased susceptibility to human epidermal growth factor receptor (HER)-negative malignant neoplasm of breast (odds ratio [OR], 1.10; 95% confidence interval [CI], 1.02-1.18; pivw = 0.01). TANK (TRAF family member associated nuclear factor kappa B (NFKB) activator) was identified as a common protective gene for both rosacea (OR, 0.90; 95% CI, 0.82-0.99; pivw = 0.048) and HER-negative malignant neoplasm of the breast (OR, 0.86; 95% CI, 0.75-0.98; pivw = 0.032), which was primarily enriched in the negative regulation of NF-κB signal transduction and may contribute to the genetic links between rosacea and this subtype of breast cancer.
    CONCLUSIONS: Our findings provide suggestive evidence for causal links between rosacea and HER-negative malignant neoplasm of the breast risk.
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  • 文章类型: Journal Article
    肝癌是临床实践中常见的癌症。目前针对这种情况的药物治疗包括靶向治疗,化疗,和免疫疗法。肿瘤溶解综合征(TLS)是肿瘤治疗中最严重的并发症。根据文献,一些病例报告TLS发生在肝癌的靶向治疗中.
    报告比值比和信息分量用于测量与靶向治疗相关的TLS的不成比例信号,使用FDA不良事件报告系统(FAERS)的数据。进行逐步灵敏度分析以测试信号的鲁棒性。使用发病时间分析来描述与靶向治疗相关的TLS事件的潜伏期。BradfordHill标准用于对证据进行全球评估。
    索拉非尼,lenvatinib,卡博替尼,贝伐单抗对TLS的不成比例信号高于化疗.索拉非尼在药物治疗后发生TLS的中位天数为5.5、6.5和6.5天,lenvatinib,分别是贝伐单抗。
    肿瘤溶解综合征与肝癌的靶向治疗之间存在显著关联,索拉非尼和乐伐替尼信号特别强烈。临床医生应该意识到肿瘤溶解综合征在肝癌靶向治疗中的潜力。
    UNASSIGNED: Hepatic cancer is a common cancer in clinical practice. Current drug therapies for this condition include targeted therapy, chemotherapy, and immunotherapy. Tumor lysis syndrome (TLS) is the most serious complication of oncology treatment. According to the literature, several cases reported TLS occurred with targeted therapies for hepatic cancer.
    UNASSIGNED: Reporting odds ratio and information component were used to measure the disproportionate signals for TLS associated with targeted therapies, using data from the FDA\'s Adverse Event Reporting System (FAERS). A stepwise sensitivity analysis was conducted to test the robustness of signals. Time-to-onset analysis was used to describe the latency of TLS events associated with targeted therapies. The Bradford Hill criteria were used to perform a global assessment of the evidence.
    UNASSIGNED: Sorafenib, lenvatinib, cabozantinib, and bevacizumab showed higher disproportionate signals for TLS than chemotherapy. The median number of days to TLS occurrence after drug therapy was 5.5, 6.5, and 6.5 days for sorafenib, lenvatinib, and bevacizumab, respectively.
    UNASSIGNED: There is a significant association between tumor lysis syndrome and targeted therapies for hepatic carcinoma, with particularly strong signals for sorafenib and lenvatinib. Clinicians should be aware of the potential for tumor lysis syndrome in targeted therapies for hepatic carcinoma.
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  • 文章类型: Journal Article
    目的:蛇床子素具有抗肿瘤活性。然而,蛇床子素是否对肝癌有放射增敏作用尚不清楚.这里,通过接种HCC-LM3细胞的皮下移植瘤来探讨蛇床子素的作用。
    方法:荷瘤小鼠用100mg/kg蛇床子素治疗12天,4Gy照射两次,或他们的组合。肿瘤体积和重量,乳酸含量,糖酵解酶活性,糖原合成酶激酶3β(GSK-3β)的蛋白表达,p‑GSK-3β,哺乳动物雷帕霉素靶蛋白(mTOR),p-mTOR,AMP激活蛋白激酶(AMPK),p-AMPK,测定葡萄糖转运蛋白1/3和丙酮酸激酶M2。还采用GSK-3β过表达的HCC-LM3或SK-Hep-1细胞模型来验证蛇床子素对这些蛋白表达的影响。
    结果:肿瘤体积和重量,乳酸含量,蛇床子素+放射组肿瘤组织糖酵解酶活性低于放射组。此外,蛇床子素可以逆转辐射诱导的肿瘤组织中p-GSK-3β/GSK-3β和p-mTOR/mTOR蛋白比例的增加以及葡萄糖转运蛋白1/3和丙酮酸激酶M2蛋白的表达,并增加p‑AMPK/AMPK的蛋白质比例。在GSK-3β过表达的HCC-LM3或SK-Hep-1细胞模型中也观察到蛇床子素对这些糖酵解相关蛋白的影响。
    结论:蛇床子素对皮下移植肝癌有放射增敏作用,其机制可能与抑制GSK-3β/AMPK/mTOR通路控制的糖酵解有关。
    OBJECTIVE: Osthole possesses anti-tumor activities. However, whether osthole can have a radiosensitization effect on hepatic cancer remains unclear. Here, an HCC-LM3 cells-inoculated subcutaneous transplanted tumor was adopted to explore the effect of osthole.
    METHODS: The tumor-bearing mice were treated with 100 mg/kg osthole for 12 days, 4 Gy irradiation twice, or their combination. The tumor volume and weight, lactic acid content, glycolytic enzyme activities, and protein expression of glycogen synthase kinase 3β (GSK-3β), p‑GSK-3β, mammalian target of rapamycin (mTOR), p‑mTOR, AMP-activated protein kinase (AMPK), p‑AMPK, glucose transporter 1/3, and pyruvate kinase M2 were determined. The GSK-3β-overexpressed HCC-LM3 or SK-Hep‑1 cell models were also adopted to verify the effects of osthole on expression of these proteins.
    RESULTS: The tumor volume and weight, lactic acid content, and glycolytic enzyme activities in tumor tissues were lower in the osthole + radiation group than in the radiation group. Moreover, osthole could reverse the radiation-induced increments of p‑GSK-3β/GSK-3β and p‑mTOR/mTOR protein ratios and the expression of glucose transporter 1/3 and pyruvate kinase M2 proteins in tumor tissues, and increase the protein ratio of p‑AMPK/AMPK. The effects of osthole on these glycolysis-related proteins were also observed in GSK-3β-overexpressed HCC-LM3 or SK-Hep‑1 cell models.
    CONCLUSIONS: Osthole has a radiosensitizing effect on subcutaneous transplanted hepatocellular carcinoma, and its mechanism may be related to inhibition of GSK-3β/AMPK/mTOR pathway-controlled glycolysis.
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  • 文章类型: Journal Article
    Dynamic PET/CT scan of 68Ga-FAPI-04 in patients with suspected malignant hepatic lesions were retrospectively analyzed to find the optimal acquisition time with better lesion detection rate.
    Twenty-two patients with lesions confirmed by CT or MRI were performed with dynamic 68Ga-FAPI-04 PET/CT scan. Tracer uptake of lesions and normal organs at different time points were analyzed. Standardized uptake value (SUV) and tumor-to-background (TBR) were calculated based on the quantification of images.
    SUV of normal organs decreased rapidly from 10 to 30 min and decreased gradually from 30 to 60 min. Besides, the uterus showed a particularly high uptake in all patients (12.62 ± 4.58 at 10 min p.i., 12.04 ± 3.99 at 30 min p.i., 10.92 ± 2.38 at 60 min p.i.). SUV of lesions decreased gradually, while TBR increased from 10- to 60-min post-injection. Visual analysis verified a comparable lesion detectability of 30 min and 60 min with images of 10 min showing a decreased lesion detection number.
    This study revealed that similar detection rates were achieved at both 30 and 60 min, suggesting a static scan at 30 min to be appropriate in the clinic. Besides, although with high lesion uptake, early 68Ga-FAPI-04 PET imaging at 10 min after tracer injection could cause missed lesion detection.
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  • 文章类型: Journal Article
    血铁水平在氧代谢和能量产生中起着至关重要的作用,而转运蛋白,转铁蛋白,结合并将铁传递到细胞内体区室的转铁蛋白受体。因此,转铁蛋白的铁结合能力是许多疾病的重要指标,其测量结果用于贫血的诊断和治疗。各种化验,包括总铁结合能力(TIBC),不饱和铁结合能力(UIBC)和转铁蛋白饱和度(TS),用于评估转铁蛋白的铁结合能力。临床上,UIBC是通过多步液体铁嗪方法在血清中测量的,并受到溶血和脂血等条件的干扰。这里,我们报告了一种快速方法,直接测量EDTA处理的血浆中的载脂蛋白转铁蛋白的浓度,理论上相当于UIBC。重要的是,这种基于超分子组装的方法更具时效性,成本效益高,对血清阳离子波动不敏感。具有额外的比色特性,这种方法还提供了异常健康状况的视觉指标,具有极端转铁蛋白状态,例如在癌症中发现的转铁蛋白状态。它对设备的最低要求对于偏远和欠发达地区的诊断特别有用。
    Blood iron levels play a vital role in oxygen metabolism and energy generation whilst transporter protein, transferrin, binds and delivers iron to the transferrin receptor of endosomal compartments of cells. Consequently, the iron-binding capacity of transferrin is an important indicator for many diseases, and its measurements are used in the diagnosis and treatment of anaemias. Various assays, including Total Iron Binding Capacity (TIBC), Unsaturated Iron-Binding Capacity (UIBC) and Transferrin Saturation (TS), were developed to assess the iron-binding capacity of transferrin. Clinically, UIBC is measured in serum by a multi-step liquid ferrozine method and subjected to interference from conditions such as haemolysis and lipemia. Here, we report a quick method that directly measures the concentration of apotransferrin in EDTA-treated plasma, theoretically equivalent to UIBC. Importantly, this supramolecular assembly-based method is more time-efficient, cost-effective and insensitive to serum cation fluctuations. With additional colorimetric property, this method also provides a visual indicator for abnormal health conditions with extreme transferrin statuses such as those found in cancers. Its minimal requirement for equipment would be particularly useful for diagnosis in remote and under-developed regions.
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  • 文章类型: Journal Article
    外泌体是膜结合的细胞外囊泡,在许多生物学过程中起重要作用。虽然它们具有很大的应用价值,外泌体隔离仍然被认为是一个重大的科学挑战。在本研究中,基于固定的肽配体和磷脂酰丝氨酸部分之间的特异性相互作用,提出了一种新的外泌体分离策略。有了新的亲和方法,完整的模型外泌体可以在短的处理时间内以高产率回收。亲和方法从血清中富集的外泌体样品的纯度远高于通过超滤分离的样品,与密度梯度离心和超速离心获得的相似。此外,由于其特定的分离原理,通过亲和方法共分离的污染物的种类相对较低。通过亲和方法从健康者血清中分离的外泌体的蛋白质组学分析,肝细胞癌患者,并对肝内胆管癌患者进行了检查,以证明该方法的适用性。总之,我们的新策略显示了易于准备的特点,高特异性,和成本效益,并为外泌体分离提供了一种有前途的方法,应具有广泛的应用。
    Exosomes are membrane bound extracellular vesicles that play an important role in many biological processes. While they have great application value, exosome isolation is still considered a major scientific challenge. In the present study, a novel separation strategy for exosomes is proposed based on the specific interaction between immobilized peptide ligands and phosphatidylserine moieties which are highly abundant on the surface of exosomes. With the new affinity method, intact model exosomes can be recovered with a high yield in a short processing time. The purity of exosome samples enriched from serum by the affinity method is far higher than that isolated by ultrafiltration, and similar to that obtained by density gradient centrifugation and ultracentrifugation. Moreover, the variety of contaminants co-isolated by the affinity method is relatively low due to its specific separation principle. Proteomics analysis of exosomes isolated by the affinity method from the serum of healthy, hepatocellular carcinoma patients, and intrahepatic cholangiocarcinoma patients was performed to prove the applicability of this method. In conclusion, our novel strategy shows characteristics of easy preparation, high specificity, and cost-effectiveness, and provides a promising approach for exosome isolation which should have wide applications.
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  • 文章类型: Journal Article
    本研究旨在研究长链非编码RNA在肝细胞癌(HCC)转移性三阴性乳腺癌淋巴结(lncRNAHUMT)中高度上调的作用和机制。定量实时聚合酶链反应用于评估HUMT的表达,microRNA(miR)-455-5p,和低密度脂蛋白受体相关蛋白4(LRP4)在肝癌组织中的表达。进行集落形成和5-乙炔基-2'-脱氧尿苷测定以评估细胞增殖。进行Transwell测定以测量细胞迁移和侵袭。使用流式细胞术评估细胞周期分布。LRP4、增殖细胞核抗原(PCNA)、基质金属肽酶2(MMP-2),使用蛋白质印迹检测MMP-9。荧光素酶报告基因测定和RNA免疫沉淀测定用于确认miR-455-5p与HUMT或LRP4之间的靶标关联。在我们的研究中,肝癌组织和细胞中HUMT水平增强。细胞增殖,入侵,肝癌细胞的迁移受到HUMT敲低的抑制,HUMT的敲除将细胞阻滞在G1期,并降低PCNA的水平,MMP-2和MMP-9。MiR-455-5p是HUMT的靶标。miR-455-5p的低表达逆转了HUMT沉默对HCC细胞的抑制作用。LRP4是miR-455-5p的靶标,并被miR-455-5p负调控。此外,LRP4表达被HUMT正修饰,LRP4抑制HUMT沉默对肝癌细胞的抑制作用。总之,肝癌细胞增殖,入侵,移民受到HUMT击倒的限制,与miR-455-5p/LRP4轴相关。
    The present study aimed at investigating the effects and mechanism of long noncoding RNA highly upregulated in metastatic triple-negative breast cancer lymph node (lncRNA HUMT) in hepatocellular carcinoma (HCC). Quantitative real-time polymerase chain reaction was used to assess the expression of HUMT, microRNA (miR)-455-5p, and low-density lipoprotein receptor-related protein 4 (LRP4) in HCC tissues. Colony forming and 5-ethynyl-2\'-deoxyuridine assays were performed to assess cell proliferation. Transwell assay was performed to measure cell migration and invasion. Cell cycle distribution was assessed using flow cytometry. The protein expression of LRP4, proliferating cell nuclear antigen (PCNA), matrix metallopeptidase 2 (MMP-2), and MMP-9 was detected using western blot. Luciferase reporter assay and RNA immunoprecipitation assay was used to confirm the target association between miR-455-5p and HUMT or LRP4. In our study, the level of HUMT was enhanced in HCC tissues and cells. Cell proliferation, invasion, and migration in HCC cells were repressed by knockdown of HUMT, and knockdown of HUMT arrested cells in G1 phase and decreased the levels of PCNA, MMP-2, and MMP-9. MiR-455-5p was a target of HUMT. Lowexpression of miR-455-5p reversed the inhibitive influence on HCC cells induced by of HUMT silencing. LRP4 was a target of miR-455-5p and was negatively regulated by miR-455-5p. In addition, LRP4 expression was positively modified by HUMT, and LRP4 inhibited the inhibitory effects on HCC cells induced by HUMT silencing. In conclusion, HCC cell proliferation, invasion, and migration were restrained by knockdown of HUMT, which was related to the miR-455-5p/LRP4 axis.
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