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龙海晨 (2026-01-15 22:55):
#paper Nordling L. Are these the happiest PhD students in the world? Nature. 2025 Oct;646(8086):1013-1016. doi: 10.1038/d41586-025-03346-4. PMID: 41116079.这是一篇nature对全球博士读博满意度的调查。这项调查共有来自107个国家的3785名自愿参与受访者。其中,44%自称女性,25%自称属于其留学国家的少数族裔,33%在非原籍国的国家学习。调查由《自然》与总部位于伦敦的研究咨询公司Thinks Insight & Strategy合作设计。此次《自然》调查中,巴西的表现格外突出——在那里学习的受访者中,高达83%的人表示对他们的博士课程满意,这一数据显著高于75%这一全球平均水平。巴西学生对他们的经历也最为乐观——80%的人表示喜欢他们的学位,78%的人感到工作有成就感,而这些对应的全球平均水平分别为70%和72%。唯一能与巴西媲美的是澳大利亚。在澳大利亚读博的学生在享受度和成就感方面与巴西持平,满意度方面仅低一个百分点。澳大利亚和巴西的学生也最有可能表示他们的博士生体验符合预期,澳大利亚有68%的人同意这一说法,巴西则为65%。在参与调查的107个国家中,有些国家的回应数量很少。有8个国家的参与者超过100名——澳大利亚(101名)、巴西(113名)、中国(312名)、德国(247名)、印度(430名)、意大利(111名)、英国(201名)和美国(568名)。显然,它们之间的比较更为可靠。另有10个国家有50至100名受访者,也被纳入本次分析。其余国家因参与者太少,无法单独研究。在澳大利亚样本中,国际博士生比例很高,这也可能影响其满意度得分。全球范围内,在国外攻读博士学位的学生报告满意度显著高于在本国学习的学生。然而,澳大利亚的生活成本更为高昂。罗素指出,每年33500澳元的博士生津贴低于澳大利亚约49000澳元的最低工资。在此次《自然》调查中,在样本量最为充足的8个国家中,中国和德国的博士生满意度低于平均水平。在中国的312名受访者在导师关系、研究指导、旅行机会和独立性,享受博士学习和有成就感等方面低于平均水平。但报告也有积极的一面。结果显示,中国博士生声称自己受到虐待的比例更低,只有 15% 的学生表示自己受到了欺凌,而在其他国家,这一比例高达 22%。同样,声称自己受到歧视或骚扰的学生比例也较低,只有 12%,其他国家为 22%。这份调查采访了 690 名中国学生,只有 55% 的人表示对自己的博士生涯有一点满意。而在针对国外学生的调查中,这一数字为 72%。当被问及「你的博士生涯在多大程度上满足了预期」时,45% 的中国博士生表示「未达预期」,而在其他国家,这一数字仅为 36%。此外,只有 5% 的中国博士生表示博士生涯超出预期,还不到国际水平的一半。那后悔了怎么办呢?22% 的中国博士生表示他们会选择更换导师,36% 的人会转换研究领域,还有 7% 的人会直接放弃。在调查中,40% 的中国博士生表示他们曾因抑郁、焦虑而去寻求心理帮助。这一比例略高于其他国家(36%)。但对于中国学生来说,这种心理帮助似乎并不是触手可及。只有 10% 的受访者表示他们得到的有效帮助来自于自己的学校或科研院所,而在其他国家,28% 的学生都可以从自己的学校得到有效帮助。满意度最高的国家: 巴西:83% 的学生表示满意,远高于全球平均的 75%。 澳大利亚:满意度接近巴西,尤其在 "享受度" 和 "成就感" 上表现突出。 意大利:82% 的学生表示满意,但对 工作与生活平衡、薪酬 等方面的满意度较低。 🇧🇷 巴西:乐观背后的韧性 尽管许多学生面临经济困难、长时间工作等问题,但整体满意度仍很高。 学生普遍提到: 导师支持 和 科研社群团结 是关键。 对科研的 使命感 和 社会贡献感 强。 政治环境改善(前总统下台)带来乐观情绪。 🇦🇺 澳大利亚:生活品质与包容性 学生享受良好的 工作与生活平衡 和 户外文化。 社会福利(如医疗补助)和 多元包容的校园环境 提升了满意度。 但生活成本高,博士生津贴低于最低工资,经济压力依然存在。 🇮🇹 意大利:满意但充满挑战 学生普遍对博士学位感到自豪,但对 薪酬、独立性、心理健康 等方面的满意度低于平均水平。 许多学生靠 对科研的热情 坚持,但现实压力大,近半数学生存在焦虑或抑郁风险。 🇨🇳 中国:满意度最低 仅有 60% 的学生表示满意,远低于全球平均。 主要原因: 工作时间极长(每周超过 80小时)超过了一些地方的“996”。 学术与就业竞争激烈,职位供不应求。 津贴低与其他国家相比,中国博士生的薪资也很低:政府给予的奖学金平均每年约42000元人民币。,压力大。过去十年,中国博士生数量翻倍增长,但科研岗位几乎没怎么增加。博士越来越多,出路却越来越窄。 “学历通胀”让博士不再是金字招牌,而导师制的层级结构、指标导向的考核体系,让科研变成了一场“精确到小数点的内卷”。 在这样的环境下,博士生的生活几乎被“论文—基金—考核”三件事绑架。 你想创新,却被要求先“跟上指标”; 你想休息,却担心落后; 你想倾诉,却被告知“科研本来就这样”。 这种高压下的“麻木生存”,让很多博士生陷入情绪倦怠。 有人调侃自己:“我们不是在读博,是在练习如何在焦虑里活下去。” 这并不是个体问题,而是整个科研体系的信号。 当一个国家的博士普遍不快乐,那说明系统里的“人”,被效率逻辑吞噬得太久了。有趣的是,《Nature》的研究还发现,博士的幸福感和经济条件的相关性并不强。 像德国这样的高福利国家,博士满意度反而低于全球平均;而像巴西这样的发展中国家,却位居榜首。 换句话说——博士幸福的关键,不在钱,而在“关系”。 调查显示,博士生如果每周能和导师见面至少一小时,满意度显著提高; 如果每周工作超过60小时,满意度则直线下降。 看似简单的数据,其实揭示了最本质的一点:博士不是机器,而是人。 能不能被理解、能不能被支持、能不能找到归属感,比工资更影响他们的幸福感。 而当体系能容纳“人”的脆弱,那才是科研最强的底气。
2.
龙海晨 (2025-12-31 19:09):
#paper Liao H, Ma R, Hao S, Tan X, Zeng X, Song R, Chen B, Cao Z, Shen W, Luo Z, Huang J, Huang H, Liu L, Duan C. Revealing Cell-Free Mitochondrial DNA Breakage Patterns as Novel Biomarkers for Sepsis. Adv Sci (Weinh). 2025 Oct;12(39):e14159. doi: 10.1002/advs.202414159. Epub 2025 Jul 26. PMID: 40714845; PMCID: PMC12533296. 这是一篇研究脓毒症的文章,该研究首次将线粒体DNA片段组学技术应用于脓毒症的早期诊断和预后评估,凸显了cfmtDNA断裂模式的临床潜力。与传统的 cfmtDNA 拷贝数分析相比,血浆 cfmtDNA 的 RNR2 和 COX2 区域的特异性断裂为脓毒症的早期诊断提供了更高的敏感性和特异性。值得注意的是,COX2 区域的高频断裂与不良预后密切相关,使其成为潜在的早期预警指标。进一步分析显示,在脓毒症患者中,血浆 cfmtDNA 暴露位点的蛋白质结合水平降低,这些位点容易被细菌释放的限制性核酸内切酶切割,从而导致高频断裂。这些见解为推进脓毒症的早期诊断和预后评估以及开发治疗靶点提供了新的方向。
Abstract:
Abstract Accurate early diagnosis and prognosis of sepsis remain major clinical challenges. This study explores specific plasma cell‐free mitochondrial DNA (cfmtDNA) breakage patterns as potential biomarkers for sepsis. Plasma samples … >>>
Abstract Accurate early diagnosis and prognosis of sepsis remain major clinical challenges. This study explores specific plasma cell‐free mitochondrial DNA (cfmtDNA) breakage patterns as potential biomarkers for sepsis. Plasma samples from ten non‐sepsis control patients and 63 sepsis patients are analyzed using mitochondrial DNA fragmentomics, revealing distinct breakage sites in the RNR2 (positions 2474–2478) and COX2 (positions 7761, 7775, 7776, 7777, and 7783) regions, which are intact in healthy individuals but exhibited high‐frequency breakage in sepsis patients. Diagnostic models based on these breakage sites show superior accuracy for sepsis detection (AUC = 0.865) and prognosis prediction (AUC = 0.809) compared to traditional cfmtDNA copy number assessments. Notably, COX2 breakage frequency correlated with inflammatory markers and SOFA scores, highlighting its prognostic potential. Mechanistic analyses suggest that reduced protein binding in sepsis may increase cfmtDNA susceptibility to cleavage by bacterial restriction endonucleases. These findings indicate that plasma cfmtDNA breakage characteristics can serve as valuable biomarkers for early sepsis detection and therapeutic monitoring. <<<
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3.
龙海晨 (2025-11-03 19:05):
#paper Lv Z, Xie G, Cui H, Yao Z, Shao C, Yuan W, Chen B. Cyclosporin-A reduced the cytotoxicity of propranolol in HUVECs via p38 MAPK signaling. Medicine (Baltimore). 2022 Jan 28;101(4):e28329. doi: 10.1097/MD.0000000000028329. PMID: 35089188; PMCID: PMC8797567.这是一篇老药新用的文章。利用人脐静脉内皮细胞 (human umbilical vein endothelial cells,HUVEC) 来研究普萘洛尔 (Propranolol ,PROP) 对细胞的作用。普萘洛尔 (PROP) 是一种非选择性 β-肾上腺素能受体拮抗剂,用于治疗高血压和心律失常。环孢素-A (cyclosporin-A,CyA) 是一种强效免疫抑制剂,属于钙调磷酸酶抑制剂类药物,主要用于预防器官移植后的排异反应,以及治疗某些自身免疫性疾病(如严重银屑病、类风湿性关节炎)。它通过抑制T淋巴细胞活性,降低免疫系统攻击移植器官或自身组织的能力,从而达到治疗效果。研究发现药物环孢素-A (CyA) 和 PROP 偶联对细胞增殖和细胞凋亡发生的机制。并且PROP 对人脐静脉内皮细胞 (HUVEC) 有抗氧化作用。CyA和PROP的组合逆转了CyA对细胞活力的影响,降低了ROS水平和PROP诱导的细胞凋亡。此外,抑制 p38 蛋白过氧化氢酶活性可立即停止 CyA-普萘洛尔对 HUVEC 的作用。 CyA-普萘洛尔组合对 HUVEC 的作用与 p38 通路的变化有关,这被证明是一种潜在的化疗药物,可以最大限度地减少 PROP 在血管瘤治疗中的副作用。
Abstract:
Abstract Propranolol (PROP) is a nonselective β-adrenergic receptor antagonist used to treat hypertension and cardiac arrhythmias. Oral administration of PROP has recently emerged as a new treatment modality for hemangiomas. … >>>
Abstract Propranolol (PROP) is a nonselective β-adrenergic receptor antagonist used to treat hypertension and cardiac arrhythmias. Oral administration of PROP has recently emerged as a new treatment modality for hemangiomas. However, the side effects of PROP at the cellular level have not been adequately described. The present study investigates and highlights the mechanisms of coupling of the drugs cyclosporin-A (CyA) and PROP on cell proliferation and the occurrence of apoptosis. It also relays the antioxidant effect of PROP on human umbilical vein endothelial cells (HUVECs). HUVECs were treated with CyA and PROP. At 24 hours after treatment, the levels of reactive oxygen species (ROS), cell proliferation, and apoptosis were determined using the ROS kit, MTT assay, and Annexin V staining. In addition, the related proteins of phospho-p38 mitogen-activated protein kinase were determined by western blotting. Subsequently, HUVECs pretreated with CyA or PROP were treated with the p38 inhibitor (SB203580). Finally, the ROS level, cell proliferation, and apoptosis were measured again in both active HUVECs and HUVECs, in which the p38 proteins were inhibited. The combination of CyA and PROP reversed the effect of CyA on cell viability, reduced the ROS level and the cell apoptosis induced by PROP. Moreover, inhibition of p38 protein catalase activity immediately stopped the effect of CyA–propranolol in HUVECs. The effect of the CyA–propranolol combination on HUVECs is associated with the p38 pathway changes, which is proven to be a potential chemotherapeutic agent that minimizes the side effects of PROP in hemangioma therapy. <<<
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龙海晨 (2025-10-17 21:47):
#paper Ji R, Ng KK, Chen W, Yang W, Zhu H, Cheung TT, Chiang CL, Wong TCL, Kong FM, Wu G, Lo CM. Comparison of clinical outcome between stereotactic body radiotherapy and radiofrequency ablation for unresectable hepatocellular carcinoma. Medicine (Baltimore). 2022 Jan 28;101(4):e28545. doi: 10.1097/MD.0000000000028545. PMID: 35089192; PMCID: PMC8797553.这是一篇对比研究,比较的是两种治疗肝细胞癌(Hepatocellular carcinoma,HCC)的方法,立体定向放射治疗(Stereotactic body radiotherapy ,SBRT)和射频消融(radiofrequency ablation,RFA)。RFA在肝脏肿瘤中的应用受到肿瘤位置的限制(肝顶、靠近内脏的包膜下区域和血管周围位置),这将排除经皮途径插入RFA针的路径。换句话说,在那些会带来严重手术创伤的情况下,需要腹腔镜或开放手术。SBRT已发展成为一种完全无创的 HCC 局部消融疗法。[ 7 ]它是一种外照射放射治疗,通过使用先进的放射计划和实施,以大分割的方式进行,每个分割中的能量剂量很高。 文章回顾性分析2018年1月至2021年1月60例不可切除的HCC患者的临床资料。 SBRT 治疗 22 例,RFA 治疗 38 例。比较短期和长期临床结果。两组之间的基线人口统计学特征没有显着差异。 SBRT 组 (81.8%) 和 RFA 组 (89.4%) 3 个月时的完全缓解率相当。两组之间的局部肿瘤控制率也相似(90.9% vs. 94.7%)。两组均未出现严重并发症(Ⅲa级或以上)。 SBRT组的1年和2年总生存率分别为88.2%和85.7%,RFA组的1年和2年总生存率分别为100%和75%。组间没有统计学显着差异(P  =0 .576)。研究发现对于不可切除的 HCC,SBRT 可以达到与 RFA 相似的短期和长期临床结果。
Abstract:
Abstract Stereotactic body radiotherapy (SBRT) is a novel noninvasive treatment for unresectable hepatocellular carcinoma (HCC). Whether its efficacy is comparable to radiofrequency ablation (RFA), a recommended therapy for unresectable HCC, … >>>
Abstract Stereotactic body radiotherapy (SBRT) is a novel noninvasive treatment for unresectable hepatocellular carcinoma (HCC). Whether its efficacy is comparable to radiofrequency ablation (RFA), a recommended therapy for unresectable HCC, is unknown. The present study aims to compare the clinical outcome between SBRT and RFA for patients with unresectable HCC. The clinical data of 60 patients with unresectable HCC from January 2018 to January 2021 were retrospectively reviewed. There were 22 cases treated by SBRT and 38 cases by RFA. The short-term and long-term clinical outcomes were compared. There was no significant difference in the baseline demographic characteristics between two groups. The complete remission rate at 3 months was comparable between SBRT group (81.8%) and RFA group (89.4%). Local tumor control rate was also similar between two groups (90.9% vs. 94.7%). There was no severe complication (grade IIIa or above) in both groups. The 1-year and 2-year overall survival rates were 88.2% and 85.7% in SBRT group and 100% and 75% in RFA group, respectively. There was no statistical significant difference between groups (P = .576). SBRT can achieve similar short and long-term clinical outcome as RFA for unresectable HCC. Future prospective clinical study is needed to justify its role in patients with HCC. <<<
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龙海晨 (2025-09-12 14:35):
#paper 龙海晨,廖新华,杜 丽,等.宫颈癌相关基因差异表达生物信息学初步分析[J].医学信息,2025,38(11):1-6,21.[doi:10.3969/j.issn.1006-1959.2025.11.001]  LONG Haichen,LIAO Xinhua,DU Li,et al.Preliminary Bioinformatics Analysis of Differentially Expressed Genes Related to Cervical Cancer[J].Journal of Medical Information,2025,38(11):1-6,21.[doi:10.3969/j.issn.1006-1959.2025.11.001] 这是我作为第一作者和通讯作者发表在国内核心期刊上的文章。利用R语言编程进行数据挖掘,通过TCGA数据库的数据分析宫颈癌中的差异表达基因,使用STRING数据库和Cytoscape软件进行蛋白互作网络分析,通过KEGG数据库,GO数据库进行信号通路富集分析。使用数据库GEPIA2对宫颈癌正常组织与肿瘤组织中基因表达进行分析。分析TCGA数据库中307例患者样本信息12 499个基因,发现上调基因1210个,下调基因1156个;蛋白互作网络分析得到88个相关基因,其中神经细胞粘附分子(NCAM1)基因最为关键。KEGG富集分析显示这些差异基因主要参与受体结合相关通路,GO富集分析显示这些差异基因涉及的生物学功能包括:肌肉、细胞基质、氨基酸结合这三个方面。通过生存分析发现宫颈癌患者高表达NCAM1基因有不良预后。这是我自学生物信息学后写的第一篇纯生物信息学的文章,去年就接收了,因为杂志排期的原因,今年才见刊。在这之前写过分子生物学和生物信息相结合的SCI,我的另一篇纯生信的SCI接收的比这篇晚,发表的比这篇早。算起来,这应该是我纯生信的第一次尝试,内容属于比较初级的练手之作。如果再让我写类似的,会比这篇成熟很多。
Abstract:
目的:通过生物信息学方法,利用R语言编程进行数据挖掘,寻找宫颈癌中有意义的基因。方法:从TCGA数据库下载宫颈癌患者临床信息以及RNA-seq数据。使用R语言limma包进行差异表达分析,筛选差异表达基因。使用STRING数据库和Cytoscape软件进行蛋白互作网络分析。使用R语言clusterProfiler包通过KEGG数据库,GO数据库进行信号通路富集分析。使用数据库GEPIA2对宫颈癌正…… >>>
目的:通过生物信息学方法,利用R语言编程进行数据挖掘,寻找宫颈癌中有意义的基因。方法:从TCGA数据库下载宫颈癌患者临床信息以及RNA-seq数据。使用R语言limma包进行差异表达分析,筛选差异表达基因。使用STRING数据库和Cytoscape软件进行蛋白互作网络分析。使用R语言clusterProfiler包通过KEGG数据库,GO数据库进行信号通路富集分析。使用数据库GEPIA2对宫颈癌正…… <<<
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龙海晨 (2025-08-09 19:14):
#paper Korany SM, El-Hendawy HH, Sonbol H, Hamada MA. Partial characterization of levan polymer from Pseudomonas fluorescens with significant cytotoxic and antioxidant activity. Saudi J Biol Sci. 2021 Nov;28(11):6679-6689. doi: 10.1016/j.sjbs.2021.08.008. Epub 2021 Aug 9. PMID: 34764781; PMCID: PMC8568983.这是一篇研究优化微生物产生多糖物质的文章。使用从埃及的土壤中分离出的假单胞菌菌株产生多糖物质(levan),研究发现。蔗糖,二氢磷酸钾,酵母提取物和pH值分别对levan浓度的影响分别显示出显着的影响。纯化的levan聚合物被证明是抗氧化剂和抗癌剂
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龙海晨 (2025-07-07 21:01):
#paper Saadh M. Epigallocatechin gallate (EGCG) combined with zinc sulfate inhibits Peste des petits ruminants virus entry and replication. Saudi J Biol Sci. 2021 Nov;28(11):6674-6678. doi: 10.1016/j.sjbs.2021.07.035. Epub 2021 Jul 17. PMID: 34764780; PMCID: PMC8568804.这是一篇研究小反刍兽疫病毒 ( Peste des petits ruminants virus , PPRV)的文章,表没食子儿茶素没食子酸酯(英文名Epigallocatechin gallate,简称EGCG)研究表明,EGCG与硫酸锌结合,可以显著抑制PPRV进入Vero细胞。这种组合可能够通过阻碍病毒适应来降低感染抗性。
8.
龙海晨 (2025-06-01 11:58):
#paper Xu Y, Lan F, Bi Q, Li X, Wang Z, Li Y, Li P, Long H, Du L. Comprehensive analysis of the prognosis and tumor immune microenvironment of ubiquitin-conjugating enzyme transport-related gene UBE2C in hepatocellular carcinoma. Discov Oncol. 2025 May 23;16(1):884. doi: 10.1007/s12672-025-02675-0. PMID: 40410642; PMCID: PMC12102447.这是我发的第一篇纯生物信息的sci,是研究肝细胞癌中泛素结合酶E2 C(UBE2C)预后意义和肿瘤免疫反应的机制的。研究发现细胞周期相关蛋白与UBE2C基因表达之间存在很高的相关性,肝癌样品中的UBE2C基因表达水平明显高于正常样本,UBE2C表达高的肝癌患者的存活率低于低表达患者。高表达的UBE2C基因与免疫抑制分子数量增加有关。 以上研究结果因为实验条件的限制,基于纯生信分析,未能进行分子生物学实验有一定的局限性。
9.
龙海晨 (2025-05-22 11:19):
#paper Akar Z. Chemical compositions by using LC-MS/MS and GC-MS and antioxidant activities of methanolic extracts from leaf and flower parts of Scabiosa columbaria subsp. columbaria var. columbaria L. Saudi J Biol Sci. 2021 Nov;28(11):6639-6644. doi: 10.1016/j.sjbs.2021.07.039. Epub 2021 Jul 17. PMID: 34764779; PMCID: PMC8568819. 这是一篇关于植物药物提取的文章。提取蓝盆花属中的有效成分,使用甲醇萃取叶子和花中的有效成分,研究其抗氧化活性。分析了叶片和花朵中的精油成分。叶片中的酚类化合物明显高于花朵。抗氧化活性物质叶片明显高于花朵。
10.
龙海晨 (2025-04-09 22:12):
#paper Schiavello E, Biassoni V, Gattuso G, Podda M, Chiaravalli S, Barretta F, Antonelli M, De Cecco L, Pecori E, Gandola L, Massimino M. A homogeneous treatment for non-DIPG diffuse midline glioma. Tumori. 2023 Jun;109(3):269-275. doi: 10.1177/03008916221099067. Epub 2022 Jun 16. PMID: 35708347; PMCID: PMC10248290. 这是一篇研究神经胶质瘤的文章。与弥漫性中线神经胶质瘤(diffuse intrinsic pontine gliomas ,DIPG)类似H3K27M突变中线神经胶质瘤(DMG)的预后情况普遍很差。文章对DMG患者进行放射疗法和伴随辅助治疗尼妥珠单抗(Nimotuzumab)‌辅助治疗Vinorelbine(长春瑞滨)。治疗了九名患者,其中七个女性,年龄13岁。三名患者进行了活检,六名患者进行了部分肿瘤切除术。局部进展的中位时间为12.7个月,中位总生存期为17.8个月。六名患者死于肿瘤进展,进展时脑出血之一。诊断后的38.6和46.3个月后,有两个还活着,一个是连续缓解的,另一个是在复发后的持续缓解。一年的无进展生存率为33.3%。 1、2和3年的总生存率分别为88.9%,33.3%和22.2%。
Abstract:
Introduction: The H3K27M-mutant diffuse midline glioma (DMG) was first included in the World Health Organization (WHO) Classification of central nervous system (CNS) tumors in 2016, and confirmed in its fifth … >>>
Introduction: The H3K27M-mutant diffuse midline glioma (DMG) was first included in the World Health Organization (WHO) Classification of central nervous system (CNS) tumors in 2016, and confirmed in its fifth edition. The biological behavior and dismal prognosis of this tumor resemble diffuse intrinsic pontine gliomas (DIPG). Homogeneously-treated series are rarely reported. Methods: From 2016 onwards, we treated patients with DMG with radiotherapy and concomitant/adjuvant nimotuzumab/vinorelbine, plus re-irradiation at relapse, as already done for DIPG. Results: We treated nine patients, seven females, with a median age at diagnosis of 13 years. Tumor sites were: thalamic in five cases, pontocerebellar in two, pineal in one, and paratrigonal with nodular/leptomeningeal dissemination in one. Three patients were biopsied, and six had partial tumor resections. Central pathological review was always performed. The median time to local progression was 12.7 months, and the median overall survival was 17.8 months. Six patients died of tumor progression, one of cerebral bleeding at progression. Two were alive, one in continuous remission, the other after relapsing, at 38.6 and 46.3 months after diagnosis. Progression-free survival was 33.3% at one year. Overall survival was 88.9%, 33.3% and 22.2% at 1, 2 and 3 years, respectively. Conclusions: This is a small series of homogeneously-treated DMG patients. The results obtained are comparable with those of DIPG patients. Given the phenotypically- and molecularly-defined setting of DMG and severe outcome in this orphan population, they should be treated and included in registries and protocols of DIPG. <<<
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11.
龙海晨 (2025-03-10 20:43):
#paper Li W, Ma G, Deng Y, Wu Q, Wang Z, Zhou Q. Artesunate exhibits synergistic anti-cancer effects with cisplatin on lung cancer A549 cells by inhibiting MAPK pathway. Gene. 2021 Jan 15;766:145134. doi: 10.1016/j.gene.2020.145134. Epub 2020 Sep 6. PMID: 32898605.这篇文章讲述了青蒿琥酯 (Artesunate,ART)联合顺铂(cisplatin,CIS) 的抗肿瘤作用。青蒿琥酯 (ART) 是一种已在全球范围内广泛用作抗疟疾药物。作者使用肺癌 A549细胞系研究发现,ART 增加剂量或增加时间的方式显着抑制细胞增殖。ART 与顺铂联合使用效果更加明显。与单一处理相比,联合处理显著降低了集落形成率,并增加了 TUNEL 阳性细胞的发生率。机制上,联合处理影响 Bcl-2 、 Bax 、 p-P53 、 Caspase-3/7 、 Caspase-9 、 CyclinB1 、 P34 、 P21 的表达,并协同调节 P38/JNK/ERK1/2 MAPK 通路的活性。
IF:2.600Q2 Gene, 2021-1. DOI: 10.1016/j.gene.2020.145134 PMID: 32898605
Abstract:
BACKGROUND: Artesunate (ART) has been used extensively as anti-malarial drugs worldwide. Besides, it has also been reported to have anti-cancer activities. This study was aimed to explore the anti-cancer activity … >>>
BACKGROUND: Artesunate (ART) has been used extensively as anti-malarial drugs worldwide. Besides, it has also been reported to have anti-cancer activities. This study was aimed to explore the anti-cancer activity of ART in combination with cisplatin (CIS) on A549 cells.METHODS: Cells were cultured with different concentrations of ART and/or CIS for 24, 48, or 72 h to test the anti-proliferative effects by CCK-8 assay. Colony formation assay and EdU staining were also performed. TUNEL staining was used to illustrate the morphologic changes. Cell cycle and apoptosis were determined by flow cytometry assay, and Western blot analysis was conducted to detect the expression of apoptosis- and proliferation-related proteins. Caspase activities were determined by colorimetric assay kit. Moreover, the synergistic effect of ART with CIS in A549 cell xenograft model was also determined.RESULTS: ART significantly inhibited cell proliferation in dose- and time-dependent manners. Collectively, the combination treatment remarkably decreased colony formation rates and increased the rates of TUNEL-positive cells compared with mono-treatment. Mechanistically, the combination treatment influenced the expression of Bcl-2, Bax, p-P53, Caspase-3/7, Caspase-9, CyclinB1, P34, P21, and synergistically regulated the activity of P38/JNK/ERK1/2 MAPK pathway. In mice A549 xenograft tumors, the combination strategy significantly increased the anti-cancer efficacy of ART and CIS alone, consistent with the in vitro observations.CONCLUSIONS: ART exhibited significant anti-tumor effect on A549 cells and this efficiency could be enhanced by combination with CIS. <<<
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12.
龙海晨 (2025-02-14 17:36):
#paper Ayub Q, Mezzavilla M, Pagani L, Haber M, Mohyuddin A, Khaliq S, Mehdi SQ, Tyler-Smith C. The Kalash genetic isolate: ancient divergence, drift, and selection. Am J Hum Genet. 2015 May 7;96(5):775-83. doi: 10.1016/j.ajhg.2015.03.012. Epub 2015 Apr 30. PMID: 25937445; PMCID: PMC4570283.这是一篇介绍基因与人种的文献,文章通过研究Kalash 基因研究人种的起源。卡拉什人代表了一个神秘的孤立的印欧语系人群,他们已经在今巴基斯坦的兴都库什山脉生活了几个世纪。在马其顿的亚历山大三世入侵该地区后,先前的 Y 染色体和线粒体 DNA 标记没有找到他们有希腊血统的有利证据。为研究该人种的起源。通过与古代狩猎采集者和欧洲农民的已发表数据进行比较表明,卡拉什人与旧石器时代西伯利亚狩猎采集者共享基因漂移遗传漂变,可能代表了一个极度漂移的古代北欧亚人群。自从从其他南亚种群中分离出来以来,卡拉什人一直保持着较低的长期有效种群规模。,并且没有从他们在巴基斯坦的地理邻居或其他现存的欧亚种群中检测到基因流动。 卡拉什人和目前居住在该地区的其他人群之间的平均分化时间估计为 11,800 年前(95% 置信区间 = 10,600−12,600年前)。基因分析表明他们代表了一些最早从西亚进入印度次大陆的移民的后代。
13.
龙海晨 (2025-01-15 10:46):
#paper Meecham A, Marshall JF. The ITGB6 gene: its role in experimental and clinical biology. Gene X. 2019 Nov 6;5:100023. doi: 10.1016/j.gene.2019.100023. PMID: 32550552; PMCID: PMC7285966. 这是一篇关于ITGB6 基因在临床生物和实验方面的综述。包括其结构、转录和转录后调控、在ITGB6缺陷小鼠中观察到的生物学效应以及ITGB6突变的临床病例。结合文献发现尽管已经进行了大量的工作来确定ITGB6基因的结构,但关于 β6 蛋白表达是如何调节的,还有许多未解答的问题。
14.
龙海晨 (2024-12-09 13:52):
#paper Järve M, Saag L, Scheib CL, Pathak AK, Montinaro F, Pagani L, Flores R, Guellil M, Saag L, Tambets K, Kushniarevich A, Solnik A, Varul L, Zadnikov S, Petrauskas O, Avramenko M, Magomedov B, Didenko S, Toshev G, Bruyako I, Grechko D, Okatenko V, Gorbenko K, Smyrnov O, Heiko A, Reida R, Sapiehin S, Sirotin S, Tairov A, Beisenov A, Starodubtsev M, Vasilev V, Nechvaloda A, Atabiev B, Litvinov S, Ekomasova N, Dzhaubermezov M, Voroniatov S, Utevska O, Shramko I, Khusnutdinova E, Metspalu M, Savelev N, Kriiska A, Kivisild T, Villems R. Shifts in the Genetic Landscape of the Western Eurasian Steppe Associated with the Beginning and End of the Scythian Dominance. Curr Biol. 2019 Jul 22;29(14):2430-2441.e10. doi: 10.1016/j.cub.2019.06.019. Epub 2019 Jul 11. PMID: 31303491. 这是一篇DNA检测与考古相结合的文章,文章对欧洲西部草原古代人类DNA进行研究,根据古代 DNA 证据,铁器时代早期的游牧斯基泰人被描述为不同起源的部落联盟 。研究提供了 31 个古代西方和东方草原个体的新全基因组序列,包括斯基泰人以及他们之前和之后的样本,在斯基泰人统治初期的铁器时代早期滨海基因库中检测到东部(阿尔泰)亲和力的增加以及东部狩猎采集者血统的减少。乌克兰斯基泰人之后的切尔尼亚希夫文化样本中近东血统的比例明显高于本研究的其他样本。基因构成与后斯基泰切尔尼亚希夫文化的哥特式起源一致。
15.
龙海晨 (2024-11-07 13:24):
#paper Galea GL, Paradise CR, Meakin LB, Camilleri ET, Taipaleenmaki H, Stein GS, Lanyon LE, Price JS, van Wijnen AJ, Dudakovic A. Mechanical strain-mediated reduction in RANKL expression is associated with RUNX2 and BRD2. Gene. 2020 Dec;763S:100027. doi: 10.1016/j.gene.2020.100027. Epub 2020 Jan 16. PMID: 34493364.这是一篇研究机械应变与成骨活动的文章。机械负荷相关的应变触发成骨细胞形成骨,同时抑制破骨细胞的骨吸收,从而开启骨形成和骨吸收的过程。骨细胞可能通过分泌硬化素(SOST)(抑制成骨细胞)和表达核因子-κB配体受体激活剂。(RANKL/TNFSF11)来生成破骨细胞协调这一过程。机械应变会降低 SOST 和 RANKL 表达。RUNX2 敲低会增加 SOST 水平。 RUNX2 促进机械应变介导的 RANKL 抑制。BRD2 表达受机械应变和 RUNX2 调节。
16.
龙海晨 (2024-10-11 14:18):
#paper Chen L, Han S, Li Y, Zheng Y, Zhang Q. SEZ6L2, regulated by USF1, accelerates the growth and metastasis of breast cancer. Exp Cell Res. 2022 Aug 1;417(1):113194. doi: 10.1016/j.yexcr.2022.113194. Epub 2022 May 4. PMID: 35523305. 这是一篇乳腺癌相关研究的文章,研究发现,SEZ6L2 促进乳腺癌细胞增殖和细胞周期。SEZ6L2促进乳腺细胞迁移和侵袭。USF1 可以转录激活 SEZ6L2。
17.
龙海晨 (2024-09-19 12:12):
#paper Zhu Q, Wan NB, Deng HW, Lu LL, Zhang Y, He X, Liu H, He Y. SEC14L3 plays a tumor-suppressive role in breast cancer through a Wnt/β-catenin-related way. Exp Cell Res. 2022 Aug 1;417(1):113161. doi: 10.1016/j.yexcr.2022.113161. Epub 2022 Apr 18. PMID: 35447102.这是一篇生物信息与分子生物学细胞生物学实验相结合的文章。文章先对TCGA-BRCA数据集进行挖掘,发现IL1F6、MRGPRX1、SEC14L3与乳腺癌患者总生存期显著相关。SEC14L3对乳腺癌的生存益处最大,选择SEC14L3进行后续研究(细胞生物学,分子生物层面)。在后续的研究重发现,SEC14L3 mRNA表达和蛋白表达情况,乳腺癌细胞系明显低于正常的乳腺上皮细胞。SEC14L3 过度表达可以抑制癌细胞迁移和侵袭的能力。SEC14L3 过表达降低了间质标志物的水平,而 SEC14L3 敲低则促进了乳腺癌细胞的恶性行为。SEC14L3 过表达还抑制了 Wnt/β-catenin 激活。乳腺癌细胞和组织中低表达的SEC14L3可能通过Wnt /β-catenin相关的方式发挥肿瘤抑制作用。
Abstract:
Breast cancer, the most prevalent malignancy in women, is also the leading cause of cancer-related deaths in women worldwide. The activation of the Wnt pathway plays a pivotal role in … >>>
Breast cancer, the most prevalent malignancy in women, is also the leading cause of cancer-related deaths in women worldwide. The activation of the Wnt pathway plays a pivotal role in the metastatic abilities of breast cancer. In this study, IL1F6, MRGPRX1, and SEC14L3 were significantly correlated to breast cancer patients'overall survival based on TCGA-BRCA dataset. Although IL1F6, MRGPRX1 and SEC14L3 high expression were associated with better survival in breast cancer patients, SEC14L3 had the biggest survival benefit for breast cancer; therefore, SEC14L3 was selected for the subsequent investigation. SEC14L3 mRNA expression and protein levels within breast cancer cell lines decreased compared with normal human breast epithelial cells. Overexpressing SEC14L3 in breast cancer cells inhibited the malignant phenotypes of cancer cells, including the capacity of cells to migrate and invade. SEC14L3 overexpression decreased the levels of mesenchymal markers, whereas SEC14L3 knockdown facilitated the malignant behaviors of breast cancer cells. SEC14L3 overexpression also inhibited Wnt/β-catenin activation. The Wnt agonist strengthened the malignant phenotypes of breast cancer cells; moreover, the anti-tumor effects of SEC14L3 overexpression were partially attenuated by the Wnt agonist. Conclusively, SEC14L3, which is underexpressed in breast cancer cells and tissues, could play a tumor-suppressive role in a Wnt/β-catenin-related way. <<<
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18.
龙海晨 (2024-08-15 22:28):
#paper Kashyap J, Tyagi RK. Mitotic genome bookmarking by nuclear receptor VDR advocates transmission of cellular transcriptional memory to progeny cells. Exp Cell Res. 2022 Aug 1;417(1):113193. doi: 10.1016/j.yexcr.2022.113193. Epub 2022 May 4. PMID: 35523304. 有丝分裂是细胞自我更新的重要过程,伴随有核结构和染色质组织的动态变化。细胞仍设法在有丝分裂后重新建立所有亲本表观遗传标记。一些序列特异性转录因子在细胞分裂过程中仍附着在有丝分裂染色质上,以确保能够及时重新激活维持细胞身份所必需的转录因子。这些有丝分裂相关因子被认为是“基因组书签因子”,这种现象被称为“基因组书签”。本研究中,讨论了另一种经典核受体 Vitamin D Receptor (VDR),VDR(NR1I1)在基因组标记中的相关性及其在谱系承诺和细胞身份中的可能作用。在细胞分裂过程中,VDR 始终与有丝分裂染色质保持组成性相关。VDR 促进有丝分裂染色质与其异二聚体伴侣 RXR,视黄酸 X 受体Retinoid X receptor (RXR) 的结合。VDR 在间期和有丝分裂期间与靶基因启动子中的 DR3 序列结合。VDR-DBD(DNA 结合域 DNA binding domain (DBD)) 在组成基因组书签中起着核心作用。
19.
龙海晨 (2024-07-08 09:45):
#paper Li X, Sun X, Li L, Luo Y, Chi Y, Zheng G. MDM2-mediated ubiquitination of LKB1 contributes to the development of diabetic cataract. Exp Cell Res. 2022 Aug 1;417(1):113191. doi: 10.1016/j.yexcr.2022.113191. Epub 2022 May 2. PMID: 35513074.糖尿病性白内障(Diabetic cataract,DC)是糖尿病的常见并发症。晶状体上皮细胞(lens epithelial cells , LEC)的上皮-间质转化(epithelial-mesenchymal transition, EMT)在DC发展中起关键作用。鼠双微体2(Murine double minute 2 ,MDM2)是一种E3泛素连接酶,通过调节多种靶点促进EMT。文章发现DC患者和大鼠晶状体中MDM2的mRNA和蛋白质水平上调。因此,构建了高糖(high glucose ,HG)诱导的人晶状体上皮细胞( human lens epithelial cells,HLEC)进行进一步研究。结果表明,HG培养的HLEC中MDM2水平升高,MDM2敲低减轻了HG诱导的异常迁移、EMT和氧化应激损伤。免疫共沉淀和泛素化试验表明,MDM2 通过泛素化降解下调了 LKB1 的表达。研究发现,LKB1 在人类和大鼠 DC 晶状体以及 HG 刺激的 HLEC 中表达较低。此外,LKB1 过表达减轻了 HG 诱导的 HLEC 功能障碍。研究数据显示,MDM2 敲低引起的 EMT 和氧化应激相关变化可以通过 LKB1 下调得到恢复。
20.
龙海晨 (2024-06-06 01:44):
#paper Sun Q, Zhang Y, Wang S, Yang F, Cai H, Xing Y, Zhou L, Chen S, Wang Y. LncRNA HOTAIR promotes α-synuclein aggregation and apoptosis of SH-SY5Y cells by regulating miR-221-3p in Parkinson's disease. Exp Cell Res. 2022 Aug 1;417(1):113132. doi: 10.1016/j.yexcr.2022.113132. Epub 2022 Apr 6. PMID: 35398161. 帕金森病 (Parkinson's disease,PD) 是一种常见的神经退行性疾病,其特征是神经元逐渐丢失。PD 的发病机制与细胞凋亡、炎症、氧化应激和 α-突触核蛋白聚集体的积累密切相关。本研究旨在探讨长链非编码RNA(long non-coding RNA ,lncRNA)HOX转录本反义RNA(HOX transcript antisense RNA,HOTAIR)在PD中的作用及其机制,文章研究检测了1-甲基-4-苯基-1,2,3,6-四氢吡啶盐酸盐(1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-hydrochloride,MPTP)处理的小鼠脑组织中HOTAIR、miR-221-3p和α-突触核蛋白的表达水平,探讨了HOTAIR对MPP +处理的SH-SY5Y细胞活力、凋亡、炎症和氧化应激的影响,并研究了HOTAIR/miR-221-3p/α-突触核蛋白的ceRNA调控网络。文章的研究结果显示,1、在 PD 模型中,HOTAIR 表达水平较高,而 miR-221-3p 表达水平较低。2、HOTAIR 敲低降低了 MPP+ 的神经毒性。3、HOTAIR降低了miR-221-3p的表达。4、α-突触核蛋白是 miR-221-3p 的靶基因。5、抑制 miR-221-3p 可逆转HOTAIR 敲低的神经保护作用。
Abstract:
Parkinson's disease (PD) is a common neurodegenerative disease. Here, the purpose of the study was to explore the function of long non-coding RNA (lncRNA) HOX transcript antisense RNA (HOTAIR) in … >>>
Parkinson's disease (PD) is a common neurodegenerative disease. Here, the purpose of the study was to explore the function of long non-coding RNA (lncRNA) HOX transcript antisense RNA (HOTAIR) in PD and its underlying mechanism. An in vivo 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-hydrochloride (MPTP)-induced mouse model of PD was generated and the SH-SY5Y cells were treated with MPP to induce neuronal damage in vitro. Quantitative real-time polymerase chain reaction (QRT-PCR) and Western blot were used to detect the expression of HOTAIR, miR-221-3p, α-synuclein and apoptosis-related genes. MTT, flow cytometry and TUNEL assay was used to detect cell viability and apoptosis, respectively. The levels of inflammatory cytokines TNF-α,IL-1β and IL-6 were detected by ELISA assay. The levels of lactate dehydrogenase (LDH), reactive oxygen species (ROS), and superoxide dismutase (SOD) were determined using the appropriate assay kits. The interactions between miR-221-3p and HOTAIR or α-synuclein were determined by dual luciferase assay and RNA binding protein immunoprecipitation (RIP). Co-localization of HOTAIR and miR-221-3p was also proved by immunofluorescence staining. The results showed that HOTAIR was highly expressed, while miR-221-3p expression was decreased in PD model in vivo and in vitro. In SH-SY5Y cells treated with MPP, the knockdown of HOTAIR increased cell viability and reduced cell apoptosis, the secretion of inflammatory cytokines and oxidative stress reaction, while HOTAIR overexpression led to opposite effects. Furthermore, HOTAIR sponged miR-221-3p which directly targeted α-synuclein and thus regulated the expression of α-synuclein. Meanwhile, inhibiting miR-221-3p could partially reverse the neuroprotective effects of HOTAIR knockdown. In conclusion, HOTAIR attenuated the injury of SH-SY5Y cells induced by MPP via miR-221-3p/α-synuclein axis, suggesting the potential therapeutic value of HOTAIR in PD. <<<
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