EGFR

EGFR
  • 文章类型: Journal Article
    背景:超重和肥胖的儿童有发展为慢性肾病(CKD)的风险。在生活方式调整期间,治疗儿童肥胖的第一步,身体比例可能会发生变化。这项研究的目的是研究生活方式干预如何影响超重和肥胖儿童基于肌酐的肾功能评估。
    方法:这项纵向生活方式干预研究包括614名超重和肥胖儿童(平均年龄12.17±3.28岁,53.6%女性,平均BMIz评分3.32±0.75)。随访失败:在1、2、3、4和5(约每年一次)随访后,纳入了305、146、70、26和10名儿童。分别。使用Q年龄和Q身高多项式重新调整血清肌酐(SCr)。
    结果:在基线时,95-97%的儿童的SCr/Q身高和SCr/Q年龄在正常参考范围[0.67-1.33]。SCr/Q每次(约每年一次)随访显著增加,和线性混合回归分析显示,每次访视的斜率在0.01~0.04之间(对应eGFRFAS减少1.1~4.1mL/min/1.73m2).男女的BMIz得分均降低,而男性的这种降低明显更高。可以证明重新缩放的SCr的变化与BMIz评分降低之间没有相关性。
    结论:在超重和肥胖儿童队列中,在多学科生活方式干预期间,重新调整血清肌酐(SCr/Q)略有增加。这种影响似乎与BMIz得分的变化无关。估计肾功能的这种轻微下降是否会产生长期的临床后果,还有待在随访时间较长的试验中观察。
    背景:ClinicalTrial.gov;注册号:NCT02091544。
    BACKGROUND: Children with overweight and obesity are at risk for developing chronic kidney disease (CKD). During lifestyle adjustment, the first step in the treatment of childhood obesity, body proportions are likely to change. The aim of this study was to examine how lifestyle intervention affects creatinine-based kidney function estimation in children with overweight and obesity.
    METHODS: This longitudinal lifestyle intervention study included 614 children with overweight and obesity (mean age 12.17 ± 3.28 years, 53.6% female, mean BMI z-score 3.32 ± 0.75). Loss to follow-up was present: 305, 146, 70, 26, and 10 children were included after 1, 2, 3, 4, and 5 (about yearly) follow-up visits, respectively. Serum creatinine (SCr) was rescaled using Q-age and Q-height polynomials.
    RESULTS: At baseline, 95-97% of the children had a SCr/Q-height and SCr/Q-age in the normal reference range [0.67-1.33]. SCr/Q significantly increased each (about yearly) follow-up visit, and linear mixed regression analyses demonstrated slopes between 0.01 and 0.04 (corresponding with eGFR FAS reduction of 1.1-4.1 mL/min/1.73 m2) per visit. BMI z-score reduced in both sexes and this reduction was significantly higher in males. No correlation between change in rescaled SCr and BMI z-score reduction could be demonstrated.
    CONCLUSIONS: Rescaled serum creatinine (SCr/Q) slightly increases during multidiscipline lifestyle intervention in this cohort of children with overweight and obesity. This effect seems to be independent from change in BMI z-score. Whether this minor decrease in estimated kidney function has clinical consequences in the long term remains to be seen in trials with a longer follow-up period.
    BACKGROUND: ClinicalTrial.gov; Registration Number: NCT02091544.
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  • 文章类型: Journal Article
    在这里,我们报道一例72岁男性患者,他患有L858REGFR突变的肺腺癌.胸部计算机断层扫描显示大的肺部肿块已完全取代了右上叶。尽管开始化疗后肿块急剧缩小,出现非恶性胸腔积液。因为弥漫性胸膜增厚和胸廓收缩逐渐变得明显,病人被诊断为肺部受困。尽管他的肺癌稳定了,他经历了严重的呼吸困难和明显的体重减轻,最终导致性能状态下降。胸科医生应该认识到,受困的肺可能会发展为肺癌中肿瘤急剧缩小的后遗症。
    Herein, we report a case of 72-year-old man who had L858R EGFR-mutated lung adenocarcinoma. Chest computed tomography revealed a large lung mass that had completely replaced the right upper lobe. Although the mass dramatically shrank after initiating chemotherapy, non-malignant pleural effusion appeared. Because diffuse pleural thickening and shrinking of the thoracic cage gradually became apparent, the patient was diagnosed with trapped lung. Despite the stabilization of his lung cancer, he experienced severe dyspnea and significant weight loss, ultimately leading to a decreased performance status. Chest physicians should recognize that trapped lung can develop as a sequela of dramatic tumor shrinkage in lung cancer.
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  • 文章类型: Journal Article
    背景:该分析检查了慢性肾脏病(CKD)和肾小球滤过率(eGFR)快速或非快速下降的患者的基线特征和临床结局,使用来自DISCOVERCKD的回顾性数据(ClinicalTrials.gov,NCT04034992)。
    方法:数据(2008-2020)来自英国临床实践研究数据链,美国TriNetX,美国有限索赔和电子健康记录数据集,和日本医疗数据愿景。包括患有CKD的患者(两次连续eGFR测量值<75mL/min/1.73m2,间隔90-730天记录)。eGFR快速下降定义为指数后2年的年下降>4mL/min/1.73m2;eGFR非快速下降定义为≤4mL/min/1.73m2的年下降。评估的临床结果包括全因死亡率,肾脏结局(肾功能衰竭[进展至CKD5期]的复合风险或eGFR下降>50%,仅肾衰竭),心血管事件-包括主要不良心血管事件(MACE;非致死性心肌梗死/卒中和心血管死亡)-和全因住院。
    结果:跨数据库,在804,237例符合条件的患者中,eGFR快速下降的发生率为13.7%.eGFR快速下降患者的年平均eGFR下降在-6.21和-6.86mL/min/1.73m2之间,而eGFR非快速下降患者的年平均eGFR下降在-0.11和-0.77mL/min/1.73m2之间。eGFR快速下降与合并症负担和药物处方增加有关。跨数据库,在eGFR快速下降与非快速下降的患者中,肾衰竭或eGFR下降>50%的复合风险显著增加(P<0.01);仅肾衰竭,MACE,在两个数据库中,全因住院率均显着增加(P<0.01-0.05)。
    结论:了解与CKD患者eGFR快速下降相关的患者因素可能有助于确定谁能从积极管理中获益,从而将不良结局的风险降至最低。
    背景:ClinicalTrials.gov标识符,NCT04034992。
    BACKGROUND: This analysis examined the baseline characteristics and clinical outcomes of patients with chronic kidney disease (CKD) and rapid or non-rapid estimated glomerular filtration rate (eGFR) decline, using retrospective data from DISCOVER CKD (ClinicalTrials.gov, NCT04034992).
    METHODS: Data (2008-2020) were extracted from UK Clinical Practice Research Datalink, US TriNetX, US Limited Claims and Electronic Health Record Dataset, and Japan Medical Data Vision. Patients with CKD (two consecutive eGFR measures < 75 mL/min/1.73 m2 recorded 90-730 days apart) were included. Rapid eGFR decline was defined as an annual decline of > 4 mL/min/1.73 m2 at 2 years post-index; non-rapid eGFR decline was defined as an annual decline of ≤ 4 mL/min/1.73 m2. Clinical outcomes assessed included all-cause mortality, kidney outcomes (composite risk of kidney failure [progression to CKD stage 5] or > 50% eGFR decline, and kidney failure alone), cardiovascular events-including major adverse cardiovascular events (MACE; non-fatal myocardial infarction/stroke and cardiovascular death)-and all-cause hospitalization.
    RESULTS: Across databases, rapid eGFR decline occurred in 13.7% of 804,237 eligible patients. Mean annual eGFR decline ranged between - 6.21 and - 6.86 mL/min/1.73 m2 in patients with rapid eGFR decline versus between - 0.11 and - 0.77 mL/min/1.73 m2 in patients with non-rapid eGFR decline. Rapid eGFR decline was associated with increased comorbidity burden and medication prescriptions. Across databases, the composite risk of kidney failure or > 50% decline in eGFR was significantly greater in patients with rapid versus non-rapid eGFR decline (P < 0.01); all-cause mortality, kidney failure alone, MACE, and all-cause hospitalization each significantly increased in two databases (P < 0.01-0.05).
    CONCLUSIONS: Understanding patient factors associated with rapid eGFR decline in patients with CKD may help identify individuals who would benefit from proactive management to minimize the risk of adverse outcomes.
    BACKGROUND: ClinicalTrials.gov identifier, NCT04034992.
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  • 文章类型: Journal Article
    炎症与癌症之间的紧密联系激发了一系列6-甲氧基萘的1,3,4-恶二唑衍生物(化合物H4-A-F)的合成。新化合物的化学结构进行了验证,利用傅里叶变换红外,质子核磁共振,碳-13核磁共振波谱技术和CHN分析。计算机辅助药物设计方法用于预测化合物的生物靶标,ADMET属性,毒性,并评估设计化合物和厄洛替尼之间的分子相似性,标准表皮生长因子受体(EGFR)抑制剂。通过3-(4,5-二甲基-2-噻唑基)-2,5-二苯基-2H-四唑溴化物测定法评估了新化合物的抗增殖作用,细胞周期分析,通过显微镜检测凋亡,定量逆转录聚合酶链反应,和免疫印迹,和EGFR酶抑制测定。新的恶二唑衍生物的计算机模拟分析表明,这些化合物靶向EGFR,化合物H4-A,H4-B,H4-C,和H4-E显示与厄洛替尼相似的分子特性。此外,结果表明,合成的化合物都不是致癌的,化合物H4-A,H4-C,和H4-F是无毒的。化合物H4-A显示最适合EGFR药效团模型的评分,然而,体外研究表明化合物H4-C的细胞毒性最强。化合物H4-C通过诱导细胞凋亡和坏死在HCT-116结直肠癌细胞中引起细胞毒性。此外,化合物H4-D,H4-C,H4-B对EGFR酪氨酸激酶的抑制作用与厄洛替尼相当.该调查的结果为进一步研究合成的化合物与厄洛替尼之间的差异提供了基础。然而,还需要进行额外的检测,以评估所有这些差异,并确定最有希望进一步研究的化合物.
    The close association between inflammation and cancer inspired the synthesis of a series of 1,3,4-oxadiazole derivatives (compounds H4-A-F) of 6-methoxynaphtalene. The chemical structures of the new compounds were validated utilizing Fourier-transform infrared, proton nuclear magnetic resonance, and carbon-13 nuclear magnetic resonance spectroscopic techniques and CHN analysis. Computer-aided drug design methods were used to predict the compounds biological target, ADMET properties, toxicity, and to evaluate the molecular similarities between the design compounds and erlotinib, a standard epidermal growth factor receptor (EGFR) inhibitor. The antiproliferative effects of the new compounds were evaluated by the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide assay, cell cycle analysis, apoptosis detection by microscopy, quantitative reverse transcription-polymerase chain reaction, and immunoblotting, and EGFR enzyme inhibition assay. In silico analysis of the new oxadiazole derivatives indicated that these compounds target EGFR, and that compounds H4-A, H4-B, H4-C, and H4-E show similar molecular properties to erlotinib. Additionally, the results indicated that none of the synthesized compounds are carcinogenic, and that compounds H4-A, H4-C, and H4-F are nontoxic. Compound H4-A showed the best-fit score against EGFR pharmacophore model, however, the in vitro studies indicated that compound H4-C was the most cytotoxic. Compound H4-C caused cytotoxicity in HCT-116 colorectal cancer cells by inducing both apoptosis and necrosis. Furthermore, compounds H4-D, H4-C, and H4-B had potent inhibitory effect on EGFR tyrosine kinase that was comparable to erlotinib. The findings of this inquiry offer a basis for further investigation into the differences between the synthesized compounds and erlotinib. However, additional testing will be needed to assess all of these differences and to identify the most promising compound for further research.
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  • 文章类型: Journal Article
    背景:2型糖尿病患者接受钠-葡萄糖共转运蛋白-2抑制剂(SGLT2is)或胰高血糖素样肽-1受体激动剂(GLP1RA)治疗后的肾脏结局尚未直接比较。这项研究比较了SGLT2i和GLP1RA治疗对肾功能和代谢参数的影响。
    方法:纳入2009年1月至2023年8月在三级医院开始SGLT2i或GLP1RA治疗的2型糖尿病患者,以评估综合肾脏结局。例如估计的肾小球滤过率(eGFR)下降40%,终末期肾病的发作,肾死亡,或新发的大量白蛋白尿。血压的改变,葡萄糖调节参数,血脂谱,和人体测量参数,包括身体脂肪和肌肉,被检查了4年。
    结果:使用1-3倾向评分匹配方法共纳入2,112名患者(GLP1RAs的528名患者,1,584名SGLT2i患者)。SGLT2i治疗优于GLP1RA治疗,虽然不重要,对于复合肾脏结局(风险比[HR],0.63;p=0.097)。SGLT2i治疗比GLP1RAs有效地保护了肾功能(eGFR降低,≥40%;HR,0.46;p=0.023),随着蛋白尿消退的改善(HR,1.72;p=0.036)。SGLT2i疗法较年夜程度降低血压和体重。然而,与SGLT2is组相比,GLP1RAs组HbA1c水平<7.0%的患者更多(40.6%vs31.4%;p<0.001).GLP1RA治疗增强β细胞功能并降低LDL-胆固醇水平低于基线值。
    结论:SGLT2is在保护肾功能和减轻体重方面具有优势,而GLP1RAs更好地管理血糖失调和血脂异常。
    BACKGROUND: Renal outcomes in patients with type 2 diabetes following treatment with sodium-glucose co-transporter-2 inhibitors (SGLT2is) or glucagon-like peptide-1 receptor agonists (GLP1RAs) have not been directly compared. This study compared the impact of SGLT2i and GLP1RA therapy on renal function and metabolic parameters.
    METHODS: Patients with type 2 diabetes who initiated SGLT2i or GLP1RA therapy in a tertiary hospital between January 2009 and August 2023 were included to assess composite renal outcomes, such as a 40% decline in estimated glomerular filtration rate (eGFR), onset of end-stage renal disease, renal death, or new-onset macroalbuminuria. Alterations in blood pressure, glucose regulation parameters, lipid profile, and anthropometric parameters, including body fat and muscle masses, were examined over 4-years.
    RESULTS: A total of 2,112 patients were enrolled using a one-to-three propensity-score matching approach (528 patients for GLP1RAs, 1,584 patients for SGLT2i). SGLT2i treatment was favoured over GLP1RA treatment, though not significantly, for composite renal outcomes (hazard ratio [HR], 0.63; p = 0.097). SGLT2i therapy preserved renal function effectively than GLP1RAs (decrease in eGFR, ≥ 40%; HR, 0.46; p = 0.023), with improving albuminuria regression (HR, 1.72; p = 0.036). SGLT2i therapy decreased blood pressure and body weight to a greater extent. However, more patients attained HbA1c levels < 7.0% with GLP1RAs than with SGLT2is (40.6% vs 31.4%; p < 0.001). GLP1RA therapy enhanced β-cell function and decreased LDL-cholesterol levels below baseline values.
    CONCLUSIONS: SGLT2is were superior for preserving renal function and reducing body weight, whereas GLP1RAs were better for managing glucose dysregulation and dyslipidaemia.
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  • 文章类型: Journal Article
    为了生存和复制,沙门氏菌已经进化了进入隐窝肠上皮细胞的机制。然而,鼠伤寒沙门氏菌对干细胞和祖细胞的影响,它们负责肠上皮自我更新和保护的能力,尚不清楚。鉴于肠道类器官的生长是由干细胞和祖细胞活动维持的,我们使用这个模型来记录鼠伤寒沙门氏菌感染对上皮增殖和分化的影响,并将其与小鼠体内沙门氏菌感染模型进行了比较。在肠段中,盲肠优先被沙门氏菌作为目标。受感染的隐窝和类器官的分析显示长度和大小增加,分别。感染的隐窝和类器官的mRNA转录谱指出上调的EGFR依赖性信号,与分泌细胞谱系分化减少有关。最后,我们表明,类器官适合模拟沙门氏菌对干细胞和祖细胞的影响,具有极大的潜力,可以大大减少在该主题的科学研究中使用动物。在这两种模型中,EGFR通路,对干细胞和祖细胞的增殖和分化至关重要,沙门氏菌失调,提示反复感染可能对隐窝完整性和进一步的肿瘤发生产生影响。
    In order to survive and replicate, Salmonella has evolved mechanisms to gain access to intestinal epithelial cells of the crypt. However, the impact of Salmonella Typhimurium on stem cells and progenitors, which are responsible for the ability of the intestinal epithelium to renew and protect itself, remains unclear. Given that intestinal organoids growth is sustained by stem cells and progenitors activity, we have used this model to document the effects of Salmonella Typhimurium infection on epithelial proliferation and differentiation, and compared it to an in vivo model of Salmonella infection in mice. Among gut segments, the caecum was preferentially targeted by Salmonella. Analysis of infected crypts and organoids demonstrated increased length and size, respectively. mRNA transcription profiles of infected crypts and organoids pointed to upregulated EGFR-dependent signals, associated with a decrease in secretory cell lineage differentiation. To conclude, we show that organoids are suited to mimic the impact of Salmonella on stem cells and progenitors cells, carrying a great potential to drastically reduce the use of animals for scientific studies on that topic. In both models, the EGFR pathway, crucial to stem cells and progenitors proliferation and differentiation, is dysregulated by Salmonella, suggesting that repeated infections might have consequences on crypt integrity and further oncogenesis.
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  • 文章类型: Journal Article
    源自天然产物的生物活性化合物在癌症治疗中表现出广泛的有益性质。抑制癌细胞生长的一种流行方法是通过刺激细胞凋亡。有趣的是,我们的研究发现,传统蘑菇和从传统草药中分离的化合物可以诱导A549细胞凋亡,同时抑制酪氨酸激酶的活性。我们已经确定了两种传统蘑菇的提取物,PhallusindusiatusandFomesrimosus(Berk。)库克,表现出激活细胞凋亡事件的有希望的能力。此外,分离的化合物,如Chamuangone,大麻酚(CBG),大麻二酚(CBD),和NP1-环肽也显示出显著的凋亡激活能力。为了进一步了解,我们分析了暴露于这些提取物和化合物的A549细胞中磷蛋白的变化,有和没有表皮生长因子(EGF)刺激。我们的阳性对照是两种已知的药物,阿法替尼和奥希替尼,是具有凋亡刺激能力的酪氨酸激酶抑制剂。为了丰富我们对激酶通路的认识,我们进行了磷蛋白富集分析,并使用LC-MS/MS鉴定了改变的磷蛋白。在这些测试条件下,我们发现1228个磷蛋白发生了改变,通过蛋白质的翻译后修饰,为A549细胞中细胞凋亡的生化机制提供有价值的见解。此外,我们的发现不仅阐明了A549细胞凋亡的机制,而且为未来的研究和治疗发展提供了有希望的途径。
    Bioactive compounds derived from natural products demonstrate a wide range of beneficial properties in cancer treatment. One popular approach to inhibiting cancer cell growth is by stimulating apoptosis. Interestingly, our research has discovered that traditional mushroom and isolated compounds from traditional herbs can induce apoptosis in A549 cells while inhibiting tyrosine kinase activities. We have identified two extracts from traditional mushrooms, Phallus indusiatus and Fomes rimosus (Berk.) Cooke, which exhibit promising abilities to activate apoptotic events in cells. Additionally, isolated compounds such as Chamuangone, Cannabigerol (CBG), Cannabidiol (CBD), and NP1-cyclic peptide have also demonstrated significant apoptotic activation capabilities. To further our understanding, we analyzed phosphoprotein changes in A549 cells exposed to these extracts and compounds, both with and without epidermal growth factor (EGF) stimulation. Our positive controls were two known drugs, Afatinib and Osimertinib, which are tyrosine kinase inhibitors with apoptotic stimulation abilities. In order to enrich our understanding of the kinase pathway, we conducted phosphoprotein enrichment analysis and identified altered phosphoproteins using LC-MS/MS. Across these testing conditions, we found that 1228 phosphoproteins were altered, providing valuable insights into the biochemical mechanisms underlying cell apoptosis in A549 cells through post-translational modifications of proteins. Furthermore, our findings not only shed light on the mechanisms of cell apoptosis in A549 cells but also offer promising avenues for future research and therapeutic development.
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  • 文章类型: Journal Article
    基于色酮的化合物已经建立了细胞毒性,抗增殖,抗转移,以及通过调节不同的分子靶标对各种癌细胞类型的抗血管生成作用。在这里,合成了17种新的色酮-2-甲酰胺衍生物,并评估了它们对15种人癌细胞系的体外抗癌活性。在测试的细胞系中,MDA-MB-231,三阴性乳腺癌细胞系,被发现是最敏感的,其中N-(2-呋喃亚甲基)(15)和α-甲基化N-苄基(17)衍生物表现出最高的生长抑制作用,GI50值为14.8和17.1μM,分别。体外机制研究证实了化合物15和17在诱导细胞凋亡和抑制EGFR中的重要作用。MDA-MB-231癌细胞中的FGFR3和VEGF蛋白水平。此外,化合物15在G0-G1和G2-M期都有细胞周期阻滞。在携带实体埃利希癌的雌性小鼠中进一步研究了化合物15作为抗肿瘤剂的体内功效。值得注意的是,化合物15的给药导致肿瘤重量和体积的显著减少,伴随着生化的改善,血液学,组织学,和免疫组织化学参数验证了血管生成和炎症的抑制作为额外的抗癌机制。此外,化合物15和17在所有三种靶受体的结合位点内的结合相互作用(EGFR,使用分子对接清楚地说明了FGFR3和VEGF)。
    Chromone-based compounds have established cytotoxic, antiproliferative, antimetastatic, and antiangiogenic effects on various cancer cell types via modulating different molecular targets. Herein, 17 novel chromone-2-carboxamide derivatives were synthesized and evaluated for their in vitro anticancer activity against 15 human cancer cell lines. Among the tested cell lines, MDA-MB-231, the triple-negative breast cancer cell line, was found to be the most sensitive, where the N-(2-furylmethylene) (15) and the α-methylated N-benzyl (17) derivatives demonstrated the highest growth inhibition with GI50 values of 14.8 and 17.1 μM, respectively. In vitro mechanistic studies confirmed the significant roles of compounds 15 and 17 in the induction of apoptosis and suppression of EGFR, FGFR3, and VEGF protein levels in MDA-MB-231 cancer cells. Moreover, compound 15 exerted cell cycle arrest at both the G0-G1 and G2-M phases. The in vivo efficacy of compound 15 as an antitumor agent was further investigated in female mice bearing Solid Ehrlich Carcinoma. Notably, administration of compound 15 resulted in a marked decrease in both tumor weight and volume, accompanied by improvements in biochemical, hematological, histological, and immunohistochemical parameters that verified the repression of both angiogenesis and inflammation as additional Anticancer mechanisms. Moreover, the binding interactions of compounds 15 and 17 within the binding sites of all three target receptors (EGFR, FGFR3, and VEGF) were clearly illustrated using molecular docking.
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  • 文章类型: Case Reports
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  • 文章类型: Journal Article
    鼻咽癌(NPC),主要发现于中国南部地区,是一种以高度转移特性而闻名的恶性肿瘤。由远处转移和疾病复发引起的高死亡率仍然是临床上尚未解决的问题。在临床上,黄连素(BBR)化合物已广泛用于鼻咽癌治疗,以减少转移和疾病复发,并且BBR被记录为具有多种抗NPC作用的主要成分。然而,BBR抑制鼻咽癌生长和转移的机制尚不清楚。在这里,我们表明,BBR有效地抑制了生长,转移,并通过诱导特异性超级增强子(SE)入侵NPC。从机械的角度来看,RNA测序(RNA-seq)结果表明RAS-RAF1-MEK1/2-ERK1/2信号通路,由表皮生长因子受体(EGFR)激活,在BBR诱导的NPC自噬中起重要作用。自噬的阻断显著减弱了BBR介导的NPC细胞生长和转移抑制的作用。值得注意的是,BBR通过转录增加EGFR的表达,和敲除EGFR显著抑制BBR诱导的微管相关蛋白1轻链3(LC3)-II的增加和p62抑制,提示EGFR在BBR诱导的NPC自噬中起关键作用。染色质免疫沉淀测序(ChIP-seq)结果发现,仅在BBR处理的NPC细胞中存在特异性SE。这种SE敲除明显抑制了EGFR和磷酸化EGFR(EGFR-p)的表达,并逆转了BBR对NPC增殖的抑制作用。转移,和入侵。此外,BBR特异性SE可能通过增强EGFR基因转录触发自噬,从而上调RAS-RAF1-MEK1/2-ERK1/2信号通路。此外,体内BBR有效抑制NPC细胞生长和转移,随着LC3和EGFR的增加和p62的减少。总的来说,这项研究确定了一种新的BBR-特殊SE,并建立了一种新的表观遗传范式,BBR调节自噬,抑制增殖,转移,和入侵。它为BBR作为未来NPC治疗中的治疗方案的应用提供了理论基础。
    Nasopharyngeal carcinoma (NPC), primarily found in the southern region of China, is a malignant tumor known for its highly metastatic characteristics. The high mortality rates caused by the distant metastasis and disease recurrence remain unsolved clinical problems. In clinic, the berberine (BBR) compound has widely been in NPC therapy to decrease metastasis and disease recurrence, and BBR was documented as a main component with multiple anti-NPC effects. However, the mechanism by which BBR inhibits the growth and metastasis of nasopharyngeal carcinoma remains elusive. Herein, we show that BBR effectively inhibits the growth, metastasis, and invasion of NPC via inducing a specific super enhancer (SE). From a mechanistic perspective, the RNA sequencing (RNA-seq) results suggest that the RAS-RAF1-MEK1/2-ERK1/2 signaling pathway, activated by the epidermal growth factor receptor (EGFR), plays a significant role in BBR-induced autophagy in NPC. Blockading of autophagy markedly attenuated the effect of BBR-mediated NPC cell growth and metastasis inhibition. Notably, BBR increased the expression of EGFR by transcription, and knockout of EGFR significantly inhibited BBR-induced microtubule associated protein 1 light chain 3 (LC3)-II increase and p62 inhibition, proposing that EGFR plays a pivotal role in BBR-induced autophagy in NPC. Chromatin immunoprecipitation sequencing (ChIP-seq) results found that a specific SE existed only in NPC cells treated with BBR. This SE knockdown markedly repressed the expression of EGFR and phosphorylated EGFR (EGFR-p) and reversed the inhibition of BBR on NPC proliferation, metastasis, and invasion. Furthermore, BBR-specific SE may trigger autophagy by enhancing EGFR gene transcription, thereby upregulating the RAS-RAF1-MEK1/2-ERK1/2 signaling pathway. In addition, in vivo BBR effectively inhibited NPC cells growth and metastasis, following an increase LC3 and EGFR and a decrease p62. Collectively, this study identifies a novel BBR-special SE and established a new epigenetic paradigm, by which BBR regulates autophagy, inhibits proliferation, metastasis, and invasion. It provides a rationale for BBR application as the treatment regime in NPC therapy in future.
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