当前共找到 1454 篇文献分享,本页显示第 61 - 80 篇。
61.
尹志 (2025-11-30 19:01):
#paper doi: 10.1101/2025.10.10.681530 Protein Hunter: exploiting structure hallucination within diffusion for protein design。基于生成式AI的蛋白质设计已经成为一种卓有成效的计算范式,但现在大多数的诟病来源于它的准确稳定及泛化能力。我非常认同本文提出的观点,即不需要对生成式AI蛋白质设计“要求过高”,即使存在幻觉,那么幻觉本身就是一种自洽的模式。我们可以通过某些特定的metric去筛选由幻觉产生的结果。考虑到当前已经有很多优秀的模型对蛋白质本身的规律(规律子集)有很好的描述,那么将这样的模型改造为生成器,通过其它手段去进行筛选,可以更充分的利用现有的大量模型。
Abstract:
1 Abstract Interactions between proteins and other biomolecules underlie nearly all biological processes, yet designing such interactions de novo remains challenging. Capturing their specific interactions and co-optimizing sequence and structure … >>>
1 Abstract Interactions between proteins and other biomolecules underlie nearly all biological processes, yet designing such interactions de novo remains challenging. Capturing their specific interactions and co-optimizing sequence and structure are difficult and often require extensive computation. We present Protein Hunter, a fast, fine-tuning-free framework for de novo protein design. Starting from an all-X sequence, we find diffusion-based structure prediction models hallucinate reasonable looking structures that can be further improved through iterative sequence re-design and structure re-prediction. This lightweight strategy achieves high AlphaFold3 in silico success rates across both unconditional and conditional generation tasks, including binders to proteins, cyclic peptides, small molecules, DNA, and RNA. Protein Hunter also supports multi-motif scaffolding and partial redesign, providing a general and efficient platform for de novo protein design across diverse molecular targets. <<<
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62.
徐炳祥 (2025-11-30 09:39):
#paper doi: 10.1016/j.jmb.2025.169155 Journal of Molecular Biology, 2025, scHiCcompare: An R Package for Differential Analysis of Single-cell Hi-C Data。单细胞Hi-C是当前分析细胞群体中染色质空间构象异质性的最常用技术。然而基于单细胞Hi-C的生物信息工作主要集中在缺失数据的填补、标准化和细胞聚类等上游领域,基于单细胞Hi-C数据的差异分析还未被充分探讨。本文介绍了一种单细胞Hi-C数据的差异分析算法scHiCcompare。该算法首先基于bandNorm的思想,使用随机森林填充细胞中的缺失值,将填补后的结果合并为pseudo-bulk,并使用基于MA plot的差异分析模型在其上进行差异分析。本文的建模过程虽基于之前的算法HiCompare,创新性有限,但算法的表现尚可。且本文展示了scHi-C建模的通用流程和关键节点,为其他任务的建模提供了思维框架。
63.
惊鸿 (2025-11-30 08:52):
DOI: 10.1038/s41591-024-03023-5  英文标题:Bilateral gene therapy in children with autosomal recessive deafness 9: single-arm trial results 发表时间:2024年6月5日(在线发表于 Nature Medicine) 一、研究背景与意义 该研究由复旦大学附属眼耳鼻喉科医院舒易来团队主导,针对因OTOF基因突变导致的常染色体隐性耳聋9型(DFNB9)患儿,首次开展双侧耳蜗AAV1-hOTOF基因治疗的临床试验。DFNB9占遗传性耳聋的2%–8%,患者通常出生即表现为重度至极重度听力损失,传统依赖人工耳蜗的方案无法恢复自然听觉通路。本研究通过腺相关病毒(AAV1)载体将功能性OTOF基因递送至患者双耳,旨在从根本上修复听觉功能。 二、研究亮点与突破 双侧治疗实现功能全面恢复 5名参与试验的患儿(平均年龄2.8岁)在接受双侧耳蜗注射后,听觉脑干反应(ABR)阈值从基线>95 dB显著改善至50–85 dB(正常对话水平为50–60 dB)。例如,一名患儿双耳阈值分别恢复至55 dB和50 dB,达到自然听力范围。 除听敏度提升外,患者言语感知(MAIS评分从0分升至35分)和声源定位能力(双耳误差从93°缩小至40°)均得到改善,证明双侧听力重建对生活质量的提升价值。 高安全性验证 试验中未出现剂量限制毒性或严重不良事件,仅记录36例轻度不良反应(如淋巴细胞计数短暂升高),所有异常均在随访期内缓解,为基因治疗的临床推广奠定安全基础。 技术创新性 研究采用双AAV载体策略,解决OTOF基因(约6 kb)超过单AAV装载上限的难题,并通过圆窗膜显微注射实现靶向递送,为其他大基因遗传病的治疗提供参考。 三、局限性与挑战 样本量与随访时间:当前仅5例患者参与,且最长随访期为26周,需扩大样本量并延长观察期以验证长期疗效与安全性。 年龄窗口限制:研究针对幼童设计,而听觉通路可塑性随年龄增长递减,对青少年或成人患者的疗效仍需进一步探索。 免疫反应风险:AAV载体可能引发预存抗体干扰疗效,需开发个体化免疫筛查方案。 四、行业影响与展望 临床转化标杆:该试验是全球首个针对DFNB9的双侧基因治疗临床研究,成果发表于《Nature Medicine》并入选《The Lancet》封面导读,被国际同行评价为“听觉领域里程碑式的突破”。 标准化框架建立:基于此研究,2025年10月由舒易来团队牵头发布的《遗传性耳聋基因治疗国际专家共识》(DOI:  10.1016/j.medj.2025.100886 )为全球临床试验提供伦理、患者筛选、手术操作等30条标准,推动领域规范化。 拓展应用前景:策略可延伸至其他遗传性耳聋(如GJB2突变),并促进非病毒载体(如脂质纳米粒)研发,降低免疫原性。 五、总结 本研究不仅证实了AAV基因治疗在遗传性耳聋领域的可行性与安全性,更通过双侧听力重建实现了从“听到声音”到“听清言语”的跨越,为全球4.3亿听力损失患者带来根治希望。未来需聚焦扩大适应年龄窗、优化载体递送效率,并推动可及性,让基因治疗从实验室走向临床普惠。 原论文链接:https://doi.org/10.1038/s41591-024-03023-5
Abstract:
AbstractGene therapy is a promising approach for hereditary deafness. We recently showed that unilateral AAV1-hOTOF gene therapy with dual adeno-associated virus (AAV) serotype 1 carrying human OTOF transgene is safe … >>>
AbstractGene therapy is a promising approach for hereditary deafness. We recently showed that unilateral AAV1-hOTOF gene therapy with dual adeno-associated virus (AAV) serotype 1 carrying human OTOF transgene is safe and associated with functional improvements in patients with autosomal recessive deafness 9 (DFNB9). The protocol was subsequently amended and approved to allow bilateral gene therapy administration. Here we report an interim analysis of the single-arm trial investigating the safety and efficacy of binaural therapy in five pediatric patients with DFNB9. The primary endpoint was dose-limiting toxicity at 6 weeks, and the secondary endpoint included safety (adverse events) and efficacy (auditory function and speech perception). No dose-limiting toxicity or serious adverse event occurred. A total of 36 adverse events occurred. The most common adverse events were increased lymphocyte counts (6 out of 36) and increased cholesterol levels (6 out of 36). All patients had bilateral hearing restoration. The average auditory brainstem response threshold in the right (left) ear was >95 dB (>95 dB) in all patients at baseline, and the average auditory brainstem response threshold in the right (left) ear was restored to 58 dB (58 dB) in patient 1, 75 dB (85 dB) in patient 2, 55 dB (50 dB) in patient 3 at 26 weeks, and 75 dB (78 dB) in patient 4 and 63 dB (63 dB) in patient 5 at 13 weeks. The speech perception and the capability of sound source localization were restored in all five patients. These results provide preliminary insights on the safety and efficacy of binaural AAV gene therapy for hereditary deafness. The trial is ongoing with longer follow-up to confirm the safety and efficacy findings. Chinese Clinical Trial Registry registration: ChiCTR2200063181. <<<
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64.
颜林林 (2025-11-30 03:46):
#paper doi:10.1073/pnas.2522808122, PNAS, 2025, From nematode to Nobel: How community-shared resources fueled the rise of Caenorhabditis elegans as a research organism. 这篇文章回顾了秀丽隐杆线虫从一种不起眼的土壤线虫发展成为现代生物学研究中最重要模式生物之一的历程,通过梳理多项基于线虫研究而获得诺贝尔奖的工作(如程序性细胞死亡、RNA干扰、绿色荧光蛋白应用等),展示了社区共享资源在其中发挥的关键作用。文章重点介绍了NIH支持下的三大核心资源平台:CGC(线虫遗传中心)负责收集、维护和分发各种突变体和野生型菌株,WormBase整合了基因组、转录组、表型、文献等多维度信息,WormAtlas则专注于行为和解剖学的可视化参考。这些资源的协同作用建立了数据与材料的标准化体系,使得不同实验室的研究结果可以相互比较和整合,加速了科学发现的进程。在我读研究生期间,在一次bio2000课程上,听过一位老师介绍线虫遗传学研究的整个社群氛围:所有数据公开共享,需要生物材料(线虫的各个品种),都会彼此分享,不藏私。这种开放共享的文化,使得线虫研究在半个多世纪里实现了从基础生物学到转化医学的跨越,成为模式生物研究的典范,也为其他领域提供了宝贵的经验借鉴和资源建设思路。反观当下,由于各种原因导致的封锁似在显现,令人深思。
Abstract:
Experimental organisms such as the nematode Caenorhabditis elegans are fundamental to biological discovery. The success of C. elegans research has been greatly enabled by infrastructure that allows thousands of scientists … >>>
Experimental organisms such as the nematode Caenorhabditis elegans are fundamental to biological discovery. The success of C. elegans research has been greatly enabled by infrastructure that allows thousands of scientists to share and access research materials and unpublished information efficiently. Here, we celebrate the worm by interweaving vignettes describing four Nobel Prize–winning discoveries with descriptions of how the major NIH-supported research resources—the Caenorhabditis Genetics Center, WormBase, and WormAtlas—provide invaluable support for all C. elegans research. The synergy between investigation and the availability of shared resources for the C. elegans community is a paradigm for all model organism research, and the continued support of such community research resources will be essential for maximizing impactful discoveries in the future. <<<
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65.
李翛然 (2025-11-29 22:54):
#paper doi:10.1038/s41586-024-08427-x Computational design of cysteine proteases Baker真的是想教会这个世界怎么用AI设计蛋白质~该研究利用深度学习模型 RFD2‑MI 从头设计了具有催化活性的半胱氨酸蛋白酶,能够在序列特异性下切割肽链酰胺键。设计的酶展示出最高约 3 × 10⁷ 倍的速率提升(kcat/k_uncat),并通过晶体结构验证其与预测模型高度一致(Cα RMSD < 1.2 Å)。所有设计的折叠均为自然界未见过的新结构(TM‑score < 0.5),实验证实其热稳定性高(Tm > 80 °C)并在中性 pH 条件下保持活性。 又是一个手把手教程~~
Abstract:
Abstract Despite advances in de novo enzyme design, success has been largely limited to low energy barrier model reactions. Amide bonds such as those linking amino acids along the peptide … >>>
Abstract Despite advances in de novo enzyme design, success has been largely limited to low energy barrier model reactions. Amide bonds such as those linking amino acids along the peptide backbone are stable for hundreds of years in neutral aqueous solution because of the high energy barrier to hydrolysis 1 . Here we describe the use of a new deep learning method, RFD2-MI 2 , to de novo design enzymes which utilize an activated cysteine nucleophile to hydrolyze the polypeptide backbone in a sequence-dependent manner, achieving rate enhancements over the background reaction ( k cat / k uncat ) of up to 3 × 10 7 . The generated designs have folds very different from the proteases in nature (TM score < 0.50), and crystal structures are very close to the design models (Cα RMSDs < 1.2 Å), highlighting the accuracy of the design methodology. Our approach has broad utility for advancing the design of novel proteases for both biotechnical and medical applications. <<<
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66.
钟鸣 (2025-11-29 21:06):
#paper doi:10.3389/fnagi.2024.1454282 The impact of body position onneurofluid dynamics: present insights and advancements in imaging 这是一篇围绕不宁腿综合征(RLS)的综述不宁腿综合征:在休息时出现移动腿部的冲动、傍晚或夜间症状加重、运动后缓解。女性患病率比男性高,发病年龄呈双峰分布,高峰在20岁和40岁左右。遗传因素起关键作用,家族史是重要风险。病理方面,脑铁缺乏和巴胺系统失调目前认为是主要机制。评分量表、血清铁蛋白、多导睡眠图要作为诊断筛查方式。
Abstract:
The intricate neurofluid dynamics and balance is essential in preserving the structural and functional integrity of the brain. Key among these forces are: hemodynamics, such as heartbeat-driven arterial and venous … >>>
The intricate neurofluid dynamics and balance is essential in preserving the structural and functional integrity of the brain. Key among these forces are: hemodynamics, such as heartbeat-driven arterial and venous blood flow, and hydrodynamics, such as cerebrospinal fluid (CSF) circulation. The delicate interplay between these dynamics is crucial for maintaining optimal homeostasis within the brain. Currently, the widely accepted framework for understanding brain functions is the Monro-Kellie’s doctrine, which posits a constant sum of intracranial CSF, blood flow and brain tissue volumes. However, in recent decades, there has been a growing interest in exploring the dynamic interplay between these elements and the impact of external factors, such as daily changes in body position. CSF circulation in particular plays a crucial role in the context of neurodegeneration and dementia, since its dysfunction has been associated with impaired clearance mechanisms and accumulation of toxic substances. Despite the implementation of various invasive and non-invasive imaging techniques to investigate the intracranial hemodynamic or hydrodynamic properties, a comprehensive understanding of how all these elements interact and are influenced by body position remains wanted. Establishing a comprehensive overview of this topic is therefore crucial and could pave the way for alternative care approaches. In this review, we aim to summarize the existing understanding of intracranial hemodynamic and hydrodynamic properties, fundamental for brain homeostasis, along with factors known to influence their equilibrium. Special attention will be devoted to elucidating the effects of body position shifts, given their significance and remaining ambiguities. Furthermore, we will explore recent advancements in imaging techniques utilized for real time and non-invasive measurements of dynamic body fluid properties in-vivo. <<<
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67.
半面阳光 (2025-11-29 14:43):
#paper DOI: 10.1086/301800 Am. J. Hum. Genet. 1998. Quantitative Analysis of Fetal DNA in Maternal Plasma and Serum: Implications for Noninvasive Prenatal Diagnosis. 这篇文献是1997年报道发现孕妇血浆的胎儿游离DNA之后,卢煜明团队发表的另一篇为后续NGS-based的NIPT检测技术有着基石意义的文章,其重要意义在于为后续基于大规模并行测序的无创产前检测方法奠定了定量基础。这篇文章采用real-time quantitative PCRs技术通过检测Y染色体上的标记基因来检测孕妇血浆和血清中的胎儿游离DNA含量,从而回答以下几个重点问题:(1)孕妇血浆中存在相当比例的胎儿cfDNA,在孕早期占比约3.9%(0.39–11.9%),孕晚期占比约6.2% (2.33–11.4%),这一发现量化了胎儿cfDNA在孕妇血浆中的比例;(2)胎儿cfDNA约在妊娠7周时可被检测到,并随妊娠进程持续增加;(3)胎儿cfDNA存在于血浆和血清中,但血浆中占比更大,这一发现为后续将血浆作为NIPT检测样本来源奠定了基础。另外,这篇文章实验设计非常清晰严谨,内容详实。虽然在1998年,各种快速低成本的分子检测技术还未出现或者普及,仅使用qPCR方法就回答了上述能够连通基础科学发现与检测技术应用的一些关键问题。
68.
符毓 (2025-11-28 00:14):
#paper doi: 10.48550/arXiv.2511.21366, 2025, THybrid Control for Robotic Nut Tightening Task 本文所提出的机器人螺母紧固系统由两部分组成:1是基于运动基元的规划框架,该框架在任务空间中运行;2是混合控制器,该控制器利用感知到的交互力来更高效地执行规划轨迹中接触密集的部分。实验评估表明,与基准系统相比,该系统完成目标的速度提高了 14.5%,同时由于施加在机械臂上的接触力比基准系统小两个数量级,因此更加安全高效。 所提出系统的规划和控制组件的计算成本都很低,与运行它们的仿真软件相比,消耗的 CPU 资源可以忽略不计。 该系统对初始配置的变化表现出很高的鲁棒性,并指明了进一步改进的方向。目前存在的一个鲁棒性瓶颈在于规划框架中的回缩运动基元。规划和控制之间更紧密的耦合将缓解问题。
arXiv, 2025/11/26. DOI: 10.48550/arXiv.2511.21366
Abstract:
An autonomous robotic nut tightening system for a serial manipulator equipped with a parallel gripper is proposed. The system features a hierarchical motion-primitive-based planner and a control-switching scheme that alternates … >>>
An autonomous robotic nut tightening system for a serial manipulator equipped with a parallel gripper is proposed. The system features a hierarchical motion-primitive-based planner and a control-switching scheme that alternates between force and position control. Extensive simulations demonstrate the system's robustness to variance in initial conditions. Additionally, the proposed controller tightens threaded screws 14% faster than the baseline while applying 40 times less contact force on manipulands. For the benefit of the research community, the system's implementation is open-sourced. <<<
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69.
孤舟蓑笠翁 (2025-11-26 17:36):
paper 【doi】10.1016/j.ecoenv.2025.119425;【发表年份】2025年;【期刊】Ecotoxicology and Environmental Safety;【标题】Revealing the toxicity mechanisms and potential targets of PM2.5-induced different types of cystitis based on Mendelian randomization and network toxicology。【内容总结】本研究旨在探索PM2.5(细颗粒物)是否会引发膀胱炎及其作用机制,因为空气污染日益严重,但PM2.5与泌尿系统疾病的关系尚不明确。研究采用孟德尔随机化(MR)分析(一种利用基因变异推断因果关系的方法)和网络毒理学(结合生物信息学系统预测毒性机制的方法)相结合的策略;首先,MR分析发现PM2.5与膀胱炎存在显著因果关联(P值<0.05),而与其他尿路感染无关,且排除了吸烟、糖尿病等混杂因素影响;随后,通过数据库获取PM2.5调控的18,763个基因,与膀胱炎相关基因交集后,富集分析显示PM2.5主要通过氧化应激、炎症反应和细胞因子产生等生物过程诱发膀胱炎,并激活MAPK、PI3K-AKT等信号通路;进一步构建蛋白质相互作用网络,利用多种算法识别关键基因,发现IL1B(白细胞介素-1β)和CD4(一种T细胞标志物)在所有类型膀胱炎(如间质性、细菌性、放射性、出血性)中均作为核心调控靶点,表明PM2.5可能通过调节这两个基因加剧膀胱炎症。总之,研究首次结合遗传学和系统生物学方法,揭示了PM2.5诱导膀胱炎的潜在机制,为预防和治疗提供了理论依据。
70.
孤舟蓑笠翁 (2025-11-25 15:34):
paper 【doi】10.1186/s12967-025-06918-0;【发表年份】2025年;【期刊】Journal of Translational Medicine;【标题】Machine learning-enhanced discovery of a basement membrane-related gene signature in glioblastoma via single-cell and Spatial transcriptomics。【内容总结】本研究旨在探索基底膜(BM)相关基因在胶质母细胞瘤(GBM)中的预后价值并开发预测模型,通过整合四个GBM队列(共614个样本)并采用差异基因分析、二元分类机器学习(如神经网络、LASSO、支持向量机等14种算法)筛选出86个核心BM基因,进而利用单变量Cox回归和多种机器学习组合(如随机生存森林、LASSO等10种算法)构建了包含FOS、ADM、PLOD3和AEBP1四个基因的BMRGs风险模型,该模型在验证队列中C指数达0.607,能有效区分高风险组(预后差)和低风险组(生存期更优),并发现高风险组与免疫抑制微环境(如M2巨噬细胞浸润增加、CD8+T细胞减少)、免疫治疗耐药性(TIDE评分更高)及对特定化疗药物(如卡铂替康)敏感性相关;单细胞和空间转录组分析进一步揭示高风险肿瘤细胞具有更强的细胞间通讯功能,且FOS可能调控其他基因表达,独立队列验证(17例患者)通过免疫组化和多重免疫荧光证实了基因共定位及模型临床可行性。
71.
孤舟蓑笠翁 (2025-11-21 12:19):
paper 【doi】10.1038/s41588-025-02403-y;【发表年份】2025年;【期刊】Nature Genetics;【标题】Scalable and accurate rare variant meta-analysis with Meta-SAIGE。【内容总结】本研究旨在解决现有罕见变异荟萃分析(Meta-analysis)方法在分析病例数极少的疾病(低患病率二元性状)时,容易产生假阳性结果(I型错误失控)且计算非常耗时的问题;为此开发了名为Meta-SAIGE的新方法,其核心是采用两种统计校正技术——鞍点近似(SaddlePoint Approximation, SPA)和基于基因型计数的SPA(GC-based SPA)——来更精确地计算关联显著性(P值),从而有效控制假阳性(例如,对于患病率1%的疾病,未校正方法的假阳性率是预期水平的近100倍,而Meta-SAIGE能将其控制在合理范围),同时通过一个关键优化即让所有表型分析共用同一个连锁不平衡(Linkage Disequilibrium, LD)矩阵,极大提升了计算效率(分析100种表型时,所需存储空间仅为另一种方法MetaSTAAR的4.44%);实际效果验证表明,Meta-SAIGE在保持高检测能力(功效)的同时,其分析结果与合并所有原始数据的金标准方法几乎一致,且速度更快(对大型基因TTN进行荟萃分析时,速度比MetaSTAAR快24.7倍);将该方法应用于英国生物银行(UK Biobank)和“我们所有人”(All of Us)两个大型数据库的83种疾病数据,共发现了237个显著的基因-疾病关联,其中有80个关联是在单独分析任一数据库时都无法发现的,这充分证明了Meta-SAIGE通过整合数据能够有效发现更多疾病相关基因。
72.
白鸟 (2025-11-21 11:38):
#paper DOI: 10.1126/science.ade2574, Evolutionary-scale prediction of atomic-level protein structure with a language model, 2023. 文章提出了ESM-2和ESM-fold模型。特点是单序列,快速预测,用高达150亿参数的Transformer蛋白质语言模型,创建了序列到结构预测器ESMFold,速度提升一个数量级。用此预测算法构建ESM宏基因组图谱数据库。 底层思路:蛋白质在漫长进化中积累了大量突变,序列中包含“可容忍的突变模式”,可从此种进化模式推测它的三维构型和功能。 工作原理:用Transformer去学习蛋白质序列内部的规则,无监督学习,训练目标是掩码预测(MLM),通过预测被遮住的氨基酸间接学习到进化规律。语言模型参数扩展至150亿时,数据规模扩大,原子级结构信息逐渐涌现。 模型的思考: 1.校准的重要性:无法人工检查所有预测,模型的置信度校准能力变得关键 2.算法的限制:只能从序列中“间接”学习结构与功能是无监督学习的天花板;模型没有显式的三维信息,从序列统计规律“猜”结构,只能输出 embedding; 3. 数据偏倚:ESM-2的大部分数据来自 MGnify:微生物序列占绝大多数,海洋菌群序列远多于哺乳动物; 作者愿景: 1.未来理解基因测序实验中发现的所有蛋白质的结构; 2.模型在参数、序列数据和计算能力未达最优,未来可能涌现更高维的结构;
Science, 2023-3-17. DOI: 10.1126/science.ade2574
Abstract:
Recent advances in machine learning have leveraged evolutionary information in multiple sequence alignments to predict protein structure. We demonstrate direct inference of full atomic-level protein structure from primary sequence using … >>>
Recent advances in machine learning have leveraged evolutionary information in multiple sequence alignments to predict protein structure. We demonstrate direct inference of full atomic-level protein structure from primary sequence using a large language model. As language models of protein sequences are scaled up to 15 billion parameters, an atomic-resolution picture of protein structure emerges in the learned representations. This results in an order-of-magnitude acceleration of high-resolution structure prediction, which enables large-scale structural characterization of metagenomic proteins. We apply this capability to construct the ESM Metagenomic Atlas by predicting structures for >617 million metagenomic protein sequences, including >225 million that are predicted with high confidence, which gives a view into the vast breadth and diversity of natural proteins. <<<
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73.
孤舟蓑笠翁 (2025-11-08 20:54):
paper 【doi】10.1126/science.adv7129;【发表年份】2025年;【期刊】Science;【标题】The origin of hepatocellular carcinoma depends on metabolic zonation。【内容总结】这项研究的目标是探索肝癌(肝细胞癌,HCC)的起源是否与肝脏中不同代谢功能区(肝小叶分为1、2、3区)有关,因为肝脏细胞在不同区域有不同的代谢功能,但尚不清楚癌症是否更容易从某些区域开始。研究者使用基因工程小鼠模型,通过一种名为“他莫昔芬诱导的Cre重组酶”的技术,在肝脏特定区域(如1区或3区)的肝细胞中同时引入两种常见的肝癌相关基因突变(激活Ctnnb1基因和失活Arid2基因),并利用谷氨酰胺合成酶(GS)的表达来追踪这些突变细胞的命运;主要方法包括基因工程小鼠模型、谱系追踪、空间转录组学分析、单细胞核DNA测序、以及使用一种名为“水动力转染”的技术快速诱导肝癌来测试特定基因的功能。结果发现,尽管在1区的突变肝细胞比正常细胞更有竞争力、数量更稳定,但令人惊讶的是,起源于3区的突变肝细胞虽然数量减少,却更容易发展成肝癌(例如,在携带双重突变的小鼠中,90%的3区突变小鼠出现肿瘤,平均每个肝脏有9.62个表面肿瘤,而1区突变小鼠只有59%出现肿瘤,平均3.68个);进一步研究发现,3区高表达的基因Gstm2和Gstm3(属于谷胱甘肽S-转移酶家族)对于肝癌的发生至关重要,它们通过抑制一种名为“铁死亡”的细胞死亡方式来促进癌变,当在小鼠中删除这些基因或使用药物抑制其活性时,肝癌的发生被显著减少;此外,研究还发现这种癌症起源的区域偏好性也存在于其他肝癌驱动模型中。总之,这项研究表明,肝脏中细胞的位置和其独特的代谢环境(特别是3区的抗氧化机制)是决定肝癌起源的关键因素,这为理解肝癌风险和开发新的治疗策略提供了新视角。
Science, 2025-11-6. DOI: 10.1126/science.adv7129
Abstract:
The origin of cancer is poorly understood because premalignant cells are rarely followed in their native environments. While the spatial compartmentalization of metabolic functions is critical for proper liver function, … >>>
The origin of cancer is poorly understood because premalignant cells are rarely followed in their native environments. While the spatial compartmentalization of metabolic functions is critical for proper liver function, it is unknown if cancers arise from some zones but not others, and if there are metabolic determinants of cancer risk. Zone-specific, mosaic introduction of Ctnnb1 and Arid2 mutations, commonly co-mutated genes in hepatocellular carcinoma (HCC), showed that position and metabolic context determine clone fates. Ctnnb1/Arid2 -driven cancers were much more likely to arise in zone 3. The zone 3 genes Gstm2 and Gstm3 were required for efficient HCC initiation, in part through inhibition of ferroptosis. In the liver, the zonal determinants of HCC development can reveal metabolic vulnerabilities of cancer. <<<
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74.
DeDe宝 (2025-11-08 01:56):
paper 【doi】10.1073/pnas.2520067122;【发表年份】2025年;【期刊】PNAS;【标题】Parallel systems for social and spatial cognition reaching the cortical apex。【内容总结】这项研究旨在厘清高级推理功能是否如同感知层面一样具有领域特异性。研究采用功能磁共振成像(fMRI)获取数据,通过全脑分析、ROI分析、功能连接分析、皮层梯度分析等方法检验功能脑区是否存在独立子系统。研究结果表明,全脑存在多处社会推理和空间推理的特异性偏好区域,这些区域在不同任务重保持一致,不受刺激物理性质和任务需求差异的影响。在解剖结构上,社会推理和空间推理的偏好区域相邻或者交替排列;但在功能连接上,区域间连接显著弱于区域内连接,说明确实存在两个独立的网络。综上,本研究支持了高级推理功能的相关皮层是多个特异性子系统构成的观点。
Abstract:
How are systems supporting high-level cognition organized in the human brain? We hypothesize that cognitive processes involved in understanding people and places are implemented by distinct neural systems with parallel … >>>
How are systems supporting high-level cognition organized in the human brain? We hypothesize that cognitive processes involved in understanding people and places are implemented by distinct neural systems with parallel anatomical organization. We test this hypothesis using precision neuroimaging of individual human brains on diverse tasks involving perception and cognition in the domains of familiar people, places, and objects. We find that thinking about people and places elicits responses in distinct areas of high-level association cortex within the default mode network, spanning the frontal, parietal, and temporal lobes. Person- and place-preferring brain regions are systematically spatially adjacent across cortical zones. These areas have strongly domain-specific response profiles across visual, semantic, and episodic tasks and are specifically functionally connected to other parts of association cortex with like domain preference. Social and spatial networks remain anatomically separated at the apex of a unimodal-to-transmodal gradient across cortex and include regions with anatomical connections to the hippocampal formation. These results demonstrate the existence of parallel, domain-specific networks reaching the cortical apex. <<<
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75.
孤舟蓑笠翁 (2025-11-06 21:44):
paper 【doi】10.1038/s41586-024-08351-7;【发表年份】2025年;【期刊】Nature;【标题】Molecular and cellular dynamics of the developing human neocortex。【内容总结】这项研究旨在全面解析人类大脑新皮层发育过程中的分子和细胞动态变化,通过构建一个高分辨率的单细胞多组学图谱来揭示细胞多样性、空间组织、基因调控网络、谱系关系以及疾病风险关联。研究团队收集了从妊娠早期到青春期的38个人类新皮层样本,结合了单核多组学测序技术(同时分析染色质可及性和基因表达)和空间转录组学方法(MERFISH),从而能够精确识别33种细胞类型并构建基因调控网络。研究发现了一种新型的三潜能中间祖细胞(Tri-IPCs),这种细胞能够产生抑制性神经元(GABA能神经元)、少突胶质前体细胞和星形胶质细胞,更新了人们对神经发生向胶质发生转换时期谱系关系的认识;研究还发现超过一半的胶质母细胞瘤(GBM)恶性细胞在转录组水平上类似于Tri-IPCs,表明癌细胞可能劫持了发育过程。此外,通过整合全基因组关联研究数据,研究创建了疾病风险图谱,揭示了自闭症谱系障碍风险在妊娠中期的皮层内神经元中富集,并且不同神经精神疾病的风险在兴奋性神经元分化过程中呈现出不同的时间峰值模式。
76.
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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77.
刘昊辰 (2025-11-01 14:44):
#paper Generating Creative Chess Puzzles. Google DeepMind 于 2025 年 10 月提出一种生成创意国际象棋谜题的方法,先通过基准测试多种生成式 AI 架构(如自回归 Transformer、潜在扩散模型等),再引入基于国际象棋引擎搜索统计数据的强化学习(RL)框架,设计奖励函数提升谜题的独特性、反直觉性、多样性和真实性;该 RL 方法使反直觉谜题生成率从监督学习的 0.22% 提升 10 倍至 2.5%,超过现有数据集(2.1%)和最佳 Lichess 训练模型(0.4%),生成的谜题在新颖性和多样性上达标且保留美学主题,经人类专家评估,其创意性、趣味性和反直觉性优于书籍谜题,最终形成的精选谜题手册获三位世界知名专家认可。下载地址:https://arxiv.org/pdf/2510.23881
arXiv, 2025-10-27T21:43:39Z. DOI: 10.48550/arXiv.2510.23881
Abstract:
While Generative AI rapidly advances in various domains, generating truly creative, aesthetic, and counter-intuitive outputs remains a challenge. This paper presents an approach to tackle these difficulties in the domain … >>>
While Generative AI rapidly advances in various domains, generating truly creative, aesthetic, and counter-intuitive outputs remains a challenge. This paper presents an approach to tackle these difficulties in the domain of chess puzzles. We start by benchmarking Generative AI architectures, and then introduce an RL framework with novel rewards based on chess engine search statistics to overcome some of those shortcomings. The rewards are designed to enhance a puzzle's uniqueness, counter-intuitiveness, diversity, and realism. Our RL approach dramatically increases counter-intuitive puzzle generation by 10x, from 0.22\% (supervised) to 2.5\%, surpassing existing dataset rates (2.1\%) and the best Lichess-trained model (0.4\%). Our puzzles meet novelty and diversity benchmarks, retain aesthetic themes, and are rated by human experts as more creative, enjoyable, and counter-intuitive than composed book puzzles, even approaching classic compositions. Our final outcome is a curated booklet of these AI-generated puzzles, which is acknowledged for creativity by three world-renowned experts. <<<
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78.
白鸟 (2025-10-31 23:36):
#paper Doi:10.1038/s43587-025-00935-w. The X-Age Project to construct a Chinese aging clock.Nat Aging 2025. 1.X-Age项目简介: 近日,中国衰老生物标志物联合体(ABC)启动了“X-Age项目”(又称“耄耋”计划),旨在开发一套针对中国人群的综合衰老评估系统。项目名称中的“X”象征衰老的复杂性、时间维度的延伸(如终身纵向随访)与空间范围的拓展(如多中心、多地区、多器官数据覆盖),以及对前沿技术的探索。此外,“X-Age”与英文“Sage”(智者)谐音,寓意智慧与长寿。 2.项目目标: 生物学年龄不同于时序年龄,它通过评估与衰老相关的生物学变化程度来反映个体的生理状态。该项目旨在为多样化中国人群构建稳健的衰老时钟。 识别稳健的衰老生物标志物,并构建能够捕捉“生物学年龄”的复合衰老时钟,覆盖多样化的中国人群。 3.项目实施: 提出了构建中国人群衰老时钟的方法学框架,以期为健康老龄化研究提供有益参考。 概述了X-Age的核心目标、方法框架与关键成果,包括队列招募、标准化样本采集、多模态数据获取以及时钟模型开发。 通过整合跨学科的专业力量,以深入理解衰老的复杂性与异质性,实现加速衰老的早期发现,并评估衰老干预措施的效果。 4.构建全面的组合式衰老时钟 1) 衰老生物标志物; 2)基于DNA甲基化模式的表观遗传衰老时钟; 3)多组学技术构建的高维衰老时钟; 4)稳健的衰老生物标志物(SenoMarkers);
Jiaming Li, Mengmeng Jiang, Qiaoran Wang, Zikai Zheng, Jianghua Shen, Jingyi Li, Muzhao Xiong, Yandong Zheng, Xiaoyong Lu, Yusheng Cai, Yanling Fan, Lingling Geng, Qianzhao Ji, Qianqian Peng, Shuhui Sun, Yuanyuan Wang, Zijuan Xin, Kaowen Yan, Yuanhan Yang, Jun Yu, Haoteng Yan, Ding Ai, Yongping Bai, Yan Bi, Xiu-Wu Bian, Pengcheng Bu, Jian-Ping Cai, Chun-Mei Cao, Feng Cao, Zhongwei Cao, Renjie Chai, Piu Chan, Chang Chen, Cheng-Shui Chen, Chunying Chen, Di Chen, Hou-Zao Chen, Lin Chen, Quan Chen, Xiao Chen, Xiaochun Chen, Yu Chen, Zi-Jiang Chen, Weimin Ci, Zhe Dai, Qiurong Ding, Birong Dong, Jiahong Dong, Jian-Gao Fan, Shiqing Feng, Xin Feng, Yun Feng, Xiaobing Fu, Xiaolong Fu, Feng Gao, Jiangang Gao, Qiang Gao, Shaorong Gao, Yonghao Gu, Youfei Guan, Feifan Guo, Jing-Dong J. Han, Haiping Hao, Jihui Hao, Fuchu He, Jinhan He, Ming He, Mingguang He, Qiyang He, Zhiying He, Zuhong He, Huashan Hong, Jiaxu Hong, Shengping Hou, Cheng Hu, Ping Hu, Zhibin Hu, Canhua Huang, Jun Huang, Kai Huang, Pengyu Huang, Xunming Ji, Yong Ji, Shunji Jia, Hong Jiang, Wenjian Jiang, Lingjing Jin, Zi-Bing Jin, Shenghong Ju, Zhenyu Ju, Qing-Peng Kong, Wei Kong, Wei-Jia Kong, Xiangqing Kong, Guanghua Lei, Geng-Lin Li, Ji Li, Jian Li, Mengfeng Li, Rong Li, Wei Li, Wei Li, Xiao-Jun Li, Xin Li, Qingfeng Liang, Zhen Liang, Haotian Lin, Baohua Liu, Cai-Yue Liu, Changsheng Liu, Feng Liu, Jianfeng Liu, Jun-Ping Liu, Ke Liu, Lin Liu, Pingsheng Liu, Qiang Liu, Qiang Liu, Tiemin Liu, Wenwen Liu, Xingguo Liu, Yajun Liu, Yong Liu, Youhua Liu, Youshuo Liu, Zhili Liu, Xiao Long, Yao Lu, Jian Luo, Xianghang Luo, Chunhong Ma, Shuai Ma, Xinran Ma, Jianhua Mao, Zhiyong Mao, Shyh-Chang Ng, Guangjun Nie, Yuyu Niu, Yaojin Peng, Jun Pu, Jieyu Qi, Li Qiang, Jie Qiao, Yingying Qin, Aijuan Qu, Jing Qu, Jie Ren, Ruibao Ren, Xiong Z. Ruan, Anbing Shi, Haibo Shi, Jie Shi, Kwok-Fai So, Moshi Song, Weihong Song, Zhou Songyang, Jiacan Su, Aijun Sun, Liang Sun, Qiang Sun, Yi Eve Sun, Yu Sun, Peifu Tang, Qi-Qun Tang, Yi Tang, Jun Tao, Ling Tao, Mei Tian, Xiao-Li Tian, Ye Tian, Xiaolin Tong, Cong-Yi Wang, Haibo Wang, Hongmei Wang, Huating Wang, Jianan Wang, Jianwei Wang, Jianwei Wang, Jiqiu Wang, Liheng Wang, Lin Wang, Miao Wang, Qiang Wang, Si Wang, Sijia Wang, Songlin Wang, Wengong Wang, Xiaoming Wang, Xiaoning Wang, Yan Wang, Yan-Jiang Wang, Yuan Wang, Yunfang Wang, Zhenning Wang, Xiawei Wei, Jianping Weng, Haitao Wu, Jihong Wu, Xiaohuan Xia, Yang Xia, Andy Peng Xiang, Guozhi Xiao, Junjie Xiao, Yichuan Xiao, Zhi-Xiong Jim Xiao, Zhengwei Xie, Wei Xiong, Aimin Xu, Hua Xu, Lingyan Xu, Ming Xu, Liying Yan, Jiayin Yang, Jichun Yang, Liu Yang, Yun-Gui Yang, Ze Yang, Zhenglin Yang, Hongjie Yao, Jing Ye, Chengqi Yi, Fan Yi, Honghua Yu, Yang Yu, Zhengrong Yu, Ti-Fei Yuan, Jirong Yue, Rui Yue, Chen Zhang, Chunxiang Zhang, Cuntai Zhang, Feng Zhang, Hongbo Zhang, Hongjia Zhang, Huijie Zhang, Jie Zhang, Jingjing Zhang, Licheng Zhang, Lingqiang Zhang, Luoying Zhang, Qingjiong Zhang, Wei Zhang, Weiping J. Zhang, Xin Zhang, Xuan Zhang, Yong Zhang, Yun-Wu Zhang, Zhanjun Zhang, Zhuohua Zhang, Bing Zhao, Guoguang Zhao, Jiajun Zhao, Meng Zhao, Tongbiao Zhao, Jialin C. Zheng, Junke Zheng, Zhuozhao Zheng, Huixia Zhou, Lili Zhou, Xiangtian Zhou, Yongsheng Zhou, Zhongjun Zhou, Lan Zhu, Yizhun Zhu, Zhiming Zhu, Wenjuan Zhuang, Weiguo Zou, Weiqi Zhang, Gang Pei, Guang-Hui Liu <<<
Abstract: No abstract available.
79.
林海onrush (2025-10-31 23:18):
#paper, PALQO: Physics-informed Model for Accelerating Large-scale Quantum Optimization,DOI:10.48550/arXiv.2509.20733。这篇论文提出了 PALQO,一种基于物理约束神经网络(PINN)的新方法用于加速大规模变分量子算法(VQAs)的训练。作者将 VQA 的参数更新过程重新表述为非线性偏微分方程(PDE)问题,并利用 PINN 在经典计算机上学习优化动力学,仅需少量量子测量数据即可预测后续参数更新,从而显著减少量子设备调用。理论分析表明,PALQO 具有良好的泛化性能,其所需训练样本数量随参数规模多项式增长。 在横场 Ising 模型、Heisenberg 模型及分子体系(如 LiH、BeH₂)等任务上的实验显示,PALQO 能在保持能量精度(误差约 (10^{-3}))的同时,将量子测量开销降低约90%,实现最高30倍加速。该方法在多体系统和量子化学计算中表现出良好的可扩展性,为在受限量子资源条件下推进大规模量子优化提供了新的思路。
arXiv, 2025-09-25T04:26:02Z. DOI: 10.48550/arXiv.2509.20733
Abstract:
Variational quantum algorithms (VQAs) are leading strategies to reachpractical utilities of near-term quantum devices. However, the no-cloningtheorem in quantum mechanics precludes standard backpropagation, leading toprohibitive quantum resource costs when applying … >>>
Variational quantum algorithms (VQAs) are leading strategies to reachpractical utilities of near-term quantum devices. However, the no-cloningtheorem in quantum mechanics precludes standard backpropagation, leading toprohibitive quantum resource costs when applying VQAs to large-scale tasks. Toaddress this challenge, we reformulate the training dynamics of VQAs as anonlinear partial differential equation and propose a novel protocol thatleverages physics-informed neural networks (PINNs) to model this dynamicalsystem efficiently. Given a small amount of training trajectory data collectedfrom quantum devices, our protocol predicts the parameter updates of VQAs overmultiple iterations on the classical side, dramatically reducing quantumresource costs. Through systematic numerical experiments, we demonstrate thatour method achieves up to a 30x speedup compared to conventional methods andreduces quantum resource costs by as much as 90\% for tasks involving up to 40qubits, including ground state preparation of different quantum systems, whilemaintaining competitive accuracy. Our approach complements existing techniquesaimed at improving the efficiency of VQAs and further strengthens theirpotential for practical applications. <<<
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80.
符毓 (2025-10-31 22:50):
#paper doi: 10.48550/arXiv.2510.10903, 2025, Towards a Unified Understanding of Robot Manipulation: A Comprehensive Survey 一篇全面涵盖机器人操作领域的全景视角综述。超 1000 篇参考系统地梳理了机器人操作领域的全景图谱,涵盖硬件与控制基础、任务与数据体系、高低层控制框架,以及跨本体与跨模态的泛化研究,并提出了一个统一的理解框架,揭示机器人如何从“执行任务”走向“理解与学习任务”。
arXiv, 2025-10-13T01:59:27Z. DOI: 10.48550/arXiv.2510.10903
Abstract:
Embodied intelligence has witnessed remarkable progress in recent years,driven by advances in computer vision, natural language processing, and therise of large-scale multimodal models. Among its core challenges, robotmanipulation stands out … >>>
Embodied intelligence has witnessed remarkable progress in recent years,driven by advances in computer vision, natural language processing, and therise of large-scale multimodal models. Among its core challenges, robotmanipulation stands out as a fundamental yet intricate problem, requiring theseamless integration of perception, planning, and control to enable interactionwithin diverse and unstructured environments. This survey presents acomprehensive overview of robotic manipulation, encompassing foundationalbackground, task-organized benchmarks and datasets, and a unified taxonomy ofexisting methods. We extend the classical division between high-level planningand low-level control by broadening high-level planning to include language,code, motion, affordance, and 3D representations, while introducing a newtaxonomy of low-level learning-based control grounded in training paradigmssuch as input modeling, latent learning, and policy learning. Furthermore, weprovide the first dedicated taxonomy of key bottlenecks, focusing on datacollection, utilization, and generalization, and conclude with an extensivereview of real-world applications. Compared with prior surveys, our work offersboth a broader scope and deeper insight, serving as an accessible roadmap fornewcomers and a structured reference for experienced researchers. All relatedresources, including research papers, open-source datasets, and projects, arecurated for the community athttps://github.com/BaiShuanghao/Awesome-Robotics-Manipulation. <<<
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