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41.
孤舟蓑笠翁
(2025-10-17 20:12):
paper 【doi】10.1038/s41556-025-01769-9;【发表年份】2025年;【期刊】Nature Cell Biology;【标题】Antagonistic stem cell fates under stress govern decisions between hair greying and melanoma。【内容总结】这项研究想搞清楚为什么压力会导致头发变白或黑色素瘤,发现关键在于黑色素干细胞(McSCs)在受到不同基因毒素时的命运选择。简单说,像辐射这样的压力会让McSCs进入“衰老分化”(同时衰老和分化),导致它们从毛囊中消失,头发就变白了,但这能防止黑色素瘤;而像DMBA(一种致癌物)或紫外线这样的压力会通过激活花生四烯酸代谢和毛囊干细胞产生的KIT配体(KITL),阻止McSCs衰老分化,促进它们自我更新和迁移到皮肤表层,从而增加黑色素瘤风险。研究方法上,他们用了小鼠模型进行体内命运追踪(比如用Dct-H2B-GFP或Dct-LacZ标记McSCs)、免疫组化分析、RNA测序(包括单细胞和批量RNA-seq)、流式细胞术分选细胞以及体外实验(如彗星试验测DNA损伤)。结果发现,辐射诱导的DNA双链断裂会激活p53-p21通路,使McSCs在激活后衰老分化并最终被清除(例如,5 Gy辐射导致McSCs数量显著减少),而致癌物处理能上调KITL表达(如DMBA使KITL表达增加),并通过激活下游信号(如NRAS或BRAF突变)绕过这一过程;此外,年龄增长会降低KITL等因子表达,促进头发变白,而KITL过表达能挽救辐射引起的白发。总之,McSCs的命运取决于压力类型:致癌压力促进自我更新和癌症,而细胞毒性压力导致衰老分化和白发,两者在干细胞水平上存在拮抗关系。
42.
孤舟蓑笠翁
(2025-10-16 15:09):
paper 【doi】10.1126/science.adx2678;【发表年份】2025年;【期刊】Science;【标题】A human pan-disease blood atlas of the circulating proteome。【内容总结】这项研究的目标是建立一个全面的“泛疾病血液蛋白质组图谱”,通过分析血液中的蛋白质来更好地理解健康和疾病状态,为精准医疗提供资源。研究人员使用了一种叫做“邻位延伸分析”(Proximity Extension Assay, PEA)的高灵敏度技术,对来自8,262名个体(包括健康人和59种疾病的患者)的血液样本进行了大规模蛋白质分析,测量了多达5,416种蛋白质。他们发现每个人的血液蛋白质谱在两年内是独特且稳定的;在从童年到成年的发育过程中,许多蛋白质水平会随年龄和性别发生显著变化,例如胶原蛋白COL9A1在儿童期很高,青春期后大幅下降;通过机器学习模型,他们能够根据血液蛋白质相当准确地预测年龄(R²=0.85)和性别(AUC=0.99)。重要的是,研究揭示了传统上在单一疾病研究中被认为是特异性的蛋白质标记物,在跨疾病比较中可能并不特异,例如在胰腺癌中升高的FGF1蛋白在细菌感染患者中也升高,这表明炎症等共同生物学途径会导致蛋白质水平的重叠。这项研究创建了一个在线资源(Human Protein Atlas),供科学界探索疾病特异性和共享的血液蛋白质模式,有助于未来的生物标志物发现和疾病机制研究。
Science,
2025-10-9.
DOI: 10.1126/science.adx2678
Abstract:
The human blood proteome provides a holistic readout of health states through the assessment of thousands of circulating proteins. Here, we present a pan-disease resource to enable the study of …
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The human blood proteome provides a holistic readout of health states through the assessment of thousands of circulating proteins. Here, we present a pan-disease resource to enable the study of diverse disease phenotypes within a harmonized proteomics dataset. By profiling protein concentrations across 59 diseases and healthy cohorts, we identified proteins associated with age, sex, and BMI, as well as disease-specific signatures. This study highlights shared and distinct protein patterns across conditions, demonstrating the power of a unified proteomics approach to uncover biological insights. The dataset, covering 8,262 individuals and up to 5,416 proteins, serves as an online resource for exploring disease-specific protein profiles and advancing precision medicine research.
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43.
孤舟蓑笠翁
(2025-10-15 10:32):
paper 【doi】10.1038/s41588-025-02351-7;【发表年份】2025年;【期刊】Nature Genetics;【标题】Spatial signatures for predicting immunotherapy outcomes using multi-omics in non-small cell lung cancer。【内容总结】这项研究的目标是开发能够预测非小细胞肺癌(NSCLC)患者对免疫治疗(基于PD-1的疗法)反应的生物标志物,因为目前只有少数患者能从中受益,且治疗可能产生严重副作用。研究团队采用了一种结合空间信息的多种组学技术(称为“空间多组学”),具体包括空间蛋白质组学(使用CODEX技术)和空间转录组学(使用DSP-GeoMx WTA技术),对来自三个独立患者队列(耶鲁大学、昆士兰大学和雅典大学,共234名晚期NSCLC患者)的肿瘤样本进行了分析,以描绘肿瘤免疫微环境(TIME),并运用机器学习方法(如LASSO惩罚的Cox回归模型)来训练与治疗结果相关的细胞类型特征和基因特征。研究发现,在肿瘤区域,增殖的肿瘤细胞、粒细胞和血管细胞构成了一个“耐药特征”,与较差的2年无进展生存期(PFS)显著相关(在训练队列中风险比HR=3.8);而在基质区域,M1/M2巨噬细胞和CD4 T细胞构成了一个“应答特征”,与较好的PFS相关(在训练队列中HR=0.4)。进一步地,研究从这些细胞类型中提取出相关的基因,构建了基因层面的特征,例如耐药基因特征(包含KRT7, KRT18等8个基因)在验证队列中也能预测较差的PFS(HR在1.7到5.3之间),而应答基因特征(包含SIGLEC1, CXCL9等8个基因)则预测较好的PFS(HR在0.22到0.56之间)。空间分析还揭示了这些细胞之间的相互作用和空间分布模式,例如发现巨噬细胞上的PD-L1表达(而非肿瘤细胞上的)与更好的治疗反应相关。这些空间多组学特征为在NSCLC中实现精准免疫治疗提供了新的强大工具。
Nature Genetics,
2025-10.
DOI: 10.1038/s41588-025-02351-7
Abstract:
Abstract Non-small cell lung cancer (NSCLC) shows variable responses to immunotherapy, highlighting the need for biomarkers to guide patient selection. We applied a spatial multi-omics approach to 234 advanced NSCLC …
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Abstract Non-small cell lung cancer (NSCLC) shows variable responses to immunotherapy, highlighting the need for biomarkers to guide patient selection. We applied a spatial multi-omics approach to 234 advanced NSCLC patients treated with programmed death 1-based immunotherapy across three cohorts to identify biomarkers associated with outcome. Spatial proteomics (n = 67) and spatial compartment-based transcriptomics (n = 131) enabled profiling of the tumor immune microenvironment (TIME). Using spatial proteomics, we identified a resistance cell-type signature including proliferating tumor cells, granulocytes, vessels (hazard ratio (HR) = 3.8, P = 0.004) and a response signature, including M1/M2 macrophages and CD4 T cells (HR = 0.4, P = 0.019). We then generated a cell-to-gene resistance signature using spatial transcriptomics, which was predictive of poor outcomes (HR = 5.3, 2.2, 1.7 across Yale, University of Queensland and University of Athens cohorts), while a cell-to-gene response signature predicted favorable outcomes (HR = 0.22, 0.38 and 0.56, respectively). This framework enables robust TIME modeling and identifies biomarkers to support precision immunotherapy in NSCLC.
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44.
孤舟蓑笠翁
(2025-10-14 13:15):
paper 【doi】10.1016/j.stem.2025.09.007;【发表年份】2025年;【期刊】Cell Stem Cell;【标题】Hypoxia promotes airway differentiation in the human lung epithelium。【内容总结】这项研究旨在探索氧气浓度(缺氧)如何影响人类肺部上皮细胞的发育和分化,特别是为什么气道细胞在低氧环境下形成而肺泡细胞则被抑制。研究人员使用人类胎儿肺部类器官作为模型,通过单细胞RNA测序、基因编辑(CRISPRi)和靶向DNA结合分析(DamID-seq)等方法,发现低氧环境通过激活HIF(缺氧诱导因子)通路,特别是HIF1α和HIF2α这两个蛋白,来促进肺部祖细胞分化为气道细胞(如基底细胞和分泌细胞),同时抑制肺泡细胞命运;具体机制包括HIF1α和HIF2α直接调控下游基因如KLF4和KLF5,从而驱动细胞分化,并且缺氧还能使成熟的肺泡细胞转化为气道样细胞,这有助于解释肺部疾病中的异常细胞变化。研究结果表明,缺氧在人类肺部发育中是一个关键的环境信号,直接影响细胞命运决定,并为理解缺氧相关肺部疾病提供了新见解。
45.
孤舟蓑笠翁
(2025-10-11 11:01):
#paper 【doi】10.1126/science.adp5056;【发表年份】2025年;【期刊】Science;【标题】A cGAS-mediated mechanism in naked mole-rats potentiates DNA repair and delays aging。【内容总结】裸鼹鼠能活37年,比同体型啮齿动物长寿近10倍,团队想知道它如何靠DNA修复避免衰老;作者先把裸鼹鼠的环GMP-AMP合酶(cGAS,一种原本在人类和小鼠里会抑制同源重组HR修复的免疫传感器)克隆出来,发现它反而增强HR,原因是C端444-554区段有4个氨基酸(S463、E511、Y527、T530)与人和小鼠不同,这4点突变让cGAS在DNA损伤后不被E3泛素连接酶TRIM41打上K48泛素链,从而不招P97 segregase把它从染色质上拖走,停留时间延长,充当“脚手架”把FA通路蛋白FANCI和DSB修复蛋白RAD50拉到一起,促进RAD50装载和RAD51招募,HR效率提高,基因组更稳定;为了验证功能,他们用CRISPR敲除、点突变、嵌合蛋白、共免疫沉淀、质谱、体外pull-down、彗星实验、HR报告基因、果蝇转基因、老年小鼠AAV尾静脉注射等方法,证明把这4个氨基酸换成“人源”版本就会失去促修复和抗衰老能力,而把人源cGAS换成“裸鼹鼠”版本则获得同样好处;在果蝇中表达裸鼹鼠cGAS(酶失活版)可下调衰老标志基因、减少肠道干细胞过度增殖、降低肠渗漏、提高攀爬和产卵力,平均寿命延长约15%,而人源cGAS则缩短寿命,4点突变可反转这些表型;17月龄小鼠接受裸鼹鼠cGAS AAV后,虚弱指数下降、毛发灰白减少、血液IgG和IL-6降低、肝肾肠衰老细胞减少、γH2AX焦点减少,肾功能改善,且效果依赖这4个氨基酸;故事讲清“负调控因子也能被进化逆转成延寿助手”,并提示通过基因或药物模仿这4个氨基酸变化、增强cGAS染色质停留,或可作为延缓人类衰老的新策略。
Science,
2025-10-9.
DOI: 10.1126/science.adp5056
Abstract:
Efficient DNA repair might make possible the longevity of naked mole-rats. However, whether they have distinctive mechanisms to optimize functions of DNA repair suppressors is unclear. We find that naked …
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Efficient DNA repair might make possible the longevity of naked mole-rats. However, whether they have distinctive mechanisms to optimize functions of DNA repair suppressors is unclear. We find that naked mole-rat cyclic guanosine monophosphate–adenosine monophosphate synthase (cGAS) lacks the suppressive function of human or mouse homologs in homologous recombination repair through the alteration of four amino acids during evolution. The changes enable cGAS to retain chromatin longer upon DNA damage by weakening TRIM41-mediated ubiquitination and interaction with the segregase P97. Prolonged chromatin binding of cGAS enhanced the interaction between repair factors FANCI and RAD50 to facilitate RAD50 recruitment to damage sites, thereby potentiating homologous recombination repair. Moreover, the four amino acids mediate the function of cGAS in antagonizing cellular and tissue aging and extending life span. Manipulating cGAS might therefore constitute a mechanism for life-span extension.
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46.
惊鸿
(2025-10-05 22:27):
#paper
论文标题:Developing glycosylase-based T-to-G and C-to-K base editors in rice
论文发表时间:2025年3月24日
论文DOI:10.1111/pbi.70063
这篇论文的观后感在于它展示了基因编辑技术向更精细维度迈进的重要突破,研究团队成功开发了基于DNA糖基化酶的胸腺嘧啶和胞嘧啶碱基编辑器,分别实现了水稻中T>G和C>K的精准替换,这不仅填补了植物中四种碱基编辑技术的最后空白,更构建了完整的水稻碱基编辑技术体系,为作物内源抗性基因的定向进化提供了全新工具,这种基于糖基化酶的编辑方法相较于传统脱氨酶介导的编辑技术,拓展了碱基替换的类型范围,尤其在实现T>G和C>G/T替换方面展现出独特优势,虽然编辑效率仍有优化空间,但其能够诱导产生多种核苷酸插入和缺失的特点,也为创造更丰富的遗传变异提供了可能,这项研究标志着基因编辑从“切割”走向“改写”的深化,为作物抗病育种和种质创新提供了更精准、更多元的技术支撑。
Abstract:
No abstract available.
47.
惊鸿
(2025-10-05 22:17):
#paper
论文标题:Transgene- and tissue culture-free heritable genome editing using RNA virus-based delivery in wheat
论文发表时间:2025年6月27日
论文DOI:10.1038/s41477-025-02023-8
这篇论文的观后感在于它展示了一种颠覆性的技术路径ViGET系统,该技术利用大麦黄条点花叶病毒BYSMV作为载体将CRISPRCas9编辑元件直接递送到小麦体内,实现了无需传统遗传转化和组织培养的可遗传基因编辑,这种方法最引人注目的突破在于它成功绕过了对基因型的依赖性并在当代就获得了不含外源转基因元件的纯合突变体,为六倍体小麦等难转化作物提供了高效育种方案,当然该技术目前仍面临编辑效率提升和病毒载体安全性优化等挑战,但无疑为作物精准育种开辟了极具潜力的新方向。
Transgene- and tissue culture-free heritable genome editing using RNA virus-based delivery in wheat.
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Abstract:
No abstract available.
48.
DeDe宝
(2025-10-03 00:43):
#paper Ormond, J., O’Keefe, J. Hippocampal place cells have goal-oriented vector fields during navigation. Nature 607, 741–746 (2022). https://doi.org/10.1038/s41586-022-04913-9这篇文章的核心内容是研究海马体中的位置细胞(place cells)在导航过程中如何动态支持目标导向的行为。研究者令大鼠在蜂窝状的迷宫中进行导航实验,大鼠需要从不同的起始平台导航到目标平台以获取食物奖励,每次移动都仅限于两个选项的强制二选一。在导航过程中,研究者记录并评估大鼠的头朝向和CA1位置细胞活动。研究发现,位置细胞的活动形成了向量场,这些向量场汇聚到环境中的特定位置,称为“汇聚点”(Convergence Sinks,简称ConSinks)。这些ConSinks在环境中分布广泛(甚至超出平台),但在目标位置附近最为密集。当目标位置改变时,ConSinks和向量场会向新的目标位置移动。这表明位置细胞不仅编码了大鼠当前的位置,还提供了到达目标的方向信息。在正确选择路径时,位置细胞的活动与目标方向一致,而在错误选择时,这种活动模式被破坏。这表明位置细胞的活动直接影响大鼠的空间行为。此外,研究还发现,在开放场地觅食任务中,位置细胞的ConSinks调谐较少,这表明ConSinks调谐在目标导向的导航中更为显著。
Nature,
2022-7-28.
DOI: 10.1038/s41586-022-04913-9
Abstract:
AbstractThe hippocampal cognitive map supports navigation towards, or away from, salient locations in familiar environments1. Although much is known about how the hippocampus encodes location in world-centred coordinates, how it …
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AbstractThe hippocampal cognitive map supports navigation towards, or away from, salient locations in familiar environments1. Although much is known about how the hippocampus encodes location in world-centred coordinates, how it supports flexible navigation is less well understood. We recorded CA1 place cells while rats navigated to a goal on the honeycomb maze2. The maze tests navigation via direct and indirect paths to the goal and allows the directionality of place cells to be assessed at each choice point. Place fields showed strong directional polarization characterized by vector fields that converged to sinks distributed throughout the environment. The distribution of these ‘convergence sinks’ (ConSinks) was centred near the goal location and the population vector field converged on the goal, providing a strong navigational signal. Changing the goal location led to movement of ConSinks and vector fields towards the new goal. The honeycomb maze allows independent assessment of spatial representation and spatial action in place cell activity and shows how the latter relates to the former. The results suggest that the hippocampus creates a vector-based model to support flexible navigation, allowing animals to select optimal paths to destinations from any location in the environment.
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49.
少颖
(2025-10-02 22:56):
#paper doi:10.3389/fpsyg.2023.1268614
Front. Psychol., 23 November 2023
More sense of self-discipline, less procrastination: the mediation of autonomous motivation
该文章提供的 “提升自控力要领” 可概括为:以 “自律感” 为核心,通过 “长期积累特质 + 短期激活状态” 双路径,结合 “绑定个人价值、积累小成功、调整环境” 等实操方法,激活自主动机,最终形成 “自律→主动行动→更少拖延” 的正向循环。这种方法无需依赖专业干预,可通过日常行为落地,尤其适用于学生、职场人等面临任务拖延的群体。
Frontiers in Psychology,
2023-11-23.
DOI: 10.3389/fpsyg.2023.1268614
Abstract:
Procrastination is considered a result of failed self-regulation. However, could experiencing a sense of successful self-discipline help to boost motivation and reduce procrastination? To explore this question, two studies were …
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Procrastination is considered a result of failed self-regulation. However, could experiencing a sense of successful self-discipline help to boost motivation and reduce procrastination? To explore this question, two studies were conducted to investigate the relationship between the sense of self-discipline, autonomous motivation, and procrastination. Results showed that trait sense of self-discipline negatively predicted general procrastination (Study 1); self-discipline primed participants procrastinated less than the control group (Study 2); autonomous motivation mediated the relationship between sense of self-discipline and procrastination (Study 1 and Study 2). These findings suggest that cultivating a sense of self-discipline can have positive effects on both autonomous motivation and procrastination, and provide useful guidance for interventions aimed at reducing procrastination.
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50.
符毓
(2025-09-30 23:42):
#paper doi: 10.48550/arXiv.2509.13311, 2025, Towards General Agentic Intelligence via Environment Scaling.
以往训练这类“代理智能”的主要瓶颈在于缺乏高质量、大规模、多样化的交互数据。人工标注成本极高,而单纯用模型生成的数据又往往不够真实或难以验证。这篇由阿里巴巴通义实验室团队发表的论文(通过环境扩展迈向通用代理智能)提出了一条全新的路径:通过程序化、自动化地构建海量、异构、可验证的模拟环境,让语言模型能在其中自主交互、收集经验、学习成长。基于该方法训练的AgentScaler模型系列,仅用数十亿参数就在多项权威测试中达到了与万亿级模型或闭源商业系统媲美的性能,为高效、轻量级代理智能的发展打开了新的可能性。
arXiv,
2025-09-16T17:57:20Z.
DOI: 10.48550/arXiv.2509.13311
Abstract:
Advanced agentic intelligence is a prerequisite for deploying Large LanguageModels in practical, real-world applications. Diverse real-world APIs demandprecise, robust function-calling intelligence, which needs agents to developthese capabilities through interaction in …
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Advanced agentic intelligence is a prerequisite for deploying Large LanguageModels in practical, real-world applications. Diverse real-world APIs demandprecise, robust function-calling intelligence, which needs agents to developthese capabilities through interaction in varied environments. The breadth offunction-calling competence is closely tied to the diversity of environments inwhich agents are trained. In this work, we scale up environments as a steptowards advancing general agentic intelligence. This gives rise to two centralchallenges: (i) how to scale environments in a principled manner, and (ii) howto effectively train agentic capabilities from experiences derived throughinteractions with these environments. To address these, we design a scalableframework that automatically constructs heterogeneous environments that arefully simulated, systematically broadening the space of function-callingscenarios. We further adapt a two-phase agent fine-tuning strategy: firstendowing agents with fundamental agentic capabilities, then specializing themfor domain-specific contexts. Extensive experiments on agentic benchmarks,tau-bench, tau2-Bench, and ACEBench, demonstrate that our trained model,AgentScaler, significantly enhances the function-calling capability of models.
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51.
尹志
(2025-09-30 22:39):
#paper Quantum computing and artificial intelligence: status and perspectives. doi: 10.48550/arXiv.2505.23860 比较新的一篇QAI的综述。比较细致的介绍了Quantum for AI及AI for Quantum,还有基础问题。最后介绍了一些目前这个领域所遇到的挑战。有两个特点值得一提,一个就是确实很新,目前基本的QAI的问题都有涉及;第二个就是这是一个全欧洲阵容的研究人员写的QAI综述,文章的开头就明确了自己的位置,这点还是很耐人寻味的。
arXiv,
2025-05-29T08:15:23Z.
DOI: 10.48550/arXiv.2505.23860
Abstract:
This white paper discusses and explores the various points of intersectionbetween quantum computing and artificial intelligence (AI). It describes howquantum computing could support the development of innovative AI solutions. Italso …
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This white paper discusses and explores the various points of intersectionbetween quantum computing and artificial intelligence (AI). It describes howquantum computing could support the development of innovative AI solutions. Italso examines use cases of classical AI that can empower research anddevelopment in quantum technologies, with a focus on quantum computing andquantum sensing. The purpose of this white paper is to provide a long-termresearch agenda aimed at addressing foundational questions about how AI andquantum computing interact and benefit one another. It concludes with a set ofrecommendations and challenges, including how to orchestrate the proposedtheoretical work, align quantum AI developments with quantum hardware roadmaps,estimate both classical and quantum resources - especially with the goal ofmitigating and optimizing energy consumption - advance this emerging hybridsoftware engineering discipline, and enhance European industrialcompetitiveness while considering societal implications.
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52.
林海onrush
(2025-09-30 22:16):
#paper, DOI: 10.19363/J.cnki.cn10-1380/tn.2023.08.34, 基于格的高效零知识证明, 这篇论文系统研究了基于格的高效零知识证明这一密码学前沿方向,重点聚焦于抗量子安全背景下的应用需求。回顾零知识证明的基本概念、发展历程及其在数字签名、身份认证、安全多方计算等领域的重要作用,指出传统基于大数分解和离散对数的方案在量子计算威胁下已不再安全。论文介绍了格密码的独特优势,如抗量子攻击、渐进高效性和基于最坏情况困难性的安全性,为零知识证明提供了新的构建基础。文章特别强调了非齐次小整数解(ISIS)问题在格密码中的核心地位,并分析了其在全同态加密、签名和环签名等协议中的广泛应用。
论文将现有的基于格的零知识证明方案分为"源于几何特征"和"源于非几何特征"两大类。其中,几何特征类方案多为对GapSVP、GapCVP等问题的间接证明;非几何特征类则细分为四类:Stern精确型、FSwA松弛型、S-FS混合型和其他精确型,每类方案在通信效率、证明精确度、困难性假设及适用场景上各有优劣。作者深入分析了各类型方案的发展脉络、设计思路与优化技术(如拒绝抽样、同态承诺和数论变换等),并对同类及跨类方案进行了系统比较。最后指出,随区块链、隐私保护等应用需求增长,设计同时兼顾安全性与效率的高效、精确的基于格零知识证明将成为未来研究的重要方向。
信息安全学报,
2021.
DOI: 10.19363/J.cnki.cn10-1380/tn.2023.08.34
Abstract:
No abstract available.
53.
哪有情可长
(2025-09-30 21:03):
#paper A haplotype-based evolutionary history of barley domestication. Nature, 25 October 2024. doi: 10.1038/s41586-025-09533-7.。团队摒弃了以往依赖单独对SNP进行群体遗传学分析模式,采用以单倍型为基本单元的策略,对 682 份代表全球多样性的野生和栽培大麦材料以及23份考古样本的全基因组序列进行系统研究。首先对栽培大麦两两比较,在1 Mb 窗口下统计SNP 差异,结果呈现明显的双峰分布:远峰与野生大麦的分布一致,反映染色体片段源自不同野生祖先;近峰为栽培大麦特有,源于驯化过程。进一步分析显示:约 300 SNP(2.5 万年前)对应预驯化的起点;约 100 SNP(8000 年前)代表栽培大麦自奠基群体分化并扩散的时间;300 SNP 与 100 SNP 之间则对应奠基群体的形成阶段。团队基于此确定 400 SNP 作为IntroBlocker的运行参数,得到野生与栽培大麦的单倍型图。通过追踪单倍型的时空起源,揭示了野生大麦对栽培大麦的贡献模式,既包括驯化早期的片段积累,也包括后期基因渗入过程。
Nature,
2025-9-24.
DOI: 10.1038/s41586-025-09533-7
Abstract:
Abstract Barley is one of the oldest cultivated crops, with a complex evolutionary and domestication history1. Previous studies have rejected the idea of a single origin and instead support a …
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Abstract Barley is one of the oldest cultivated crops, with a complex evolutionary and domestication history1. Previous studies have rejected the idea of a single origin and instead support a model of mosaic genomic ancestry2,3. With increasingly comprehensive genome data, we now ask where the haplotypes — the building blocks of this mosaic — originate, and whether all domesticated barleys share the same wild progenitors or whether certain wild populations contribute more heavily to specific lineages. To address these questions, we apply a haplotype-based approach to investigate the genetic diversity and population structure of wild and domesticated barley. We analyse whole-genome sequences from 682 genebank accessions and 23 archaeological specimens, tracing the spatiotemporal origins of haplotypes and identifying wild contributors during domestication and later gene flow events. Ancient DNA supports our genome-wide findings from modern samples. Our results suggest that a founding domesticated population emerged in the Fertile Crescent during a prolonged period of pre-domestication cultivation. A key practical insight is that the high haplotype differentiation among barley populations — arising independently, or layered on top, of selection — poses challenges for mapping adaptive loci.
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54.
Vincent
(2025-09-30 19:34):
#paper https://doi.org/10.1038/s43588-025-00849-y Nat Comput Sci. 2025. SciToolAgent: a knowledge-graph-driven scientific agent for multitool integration. 现有 LLM 工具代理在科学研究中往往只能单步调用或简单串联工具,难以处理复杂工作流,且缺乏对输入输出兼容性与安全性的控制。本文提出 SciToolAgent,将科学工具知识图谱 (TKG) 融入 LLM,利用图检索增强生成 (graph-RAG) 指导工具选择与衔接,并在运行过程中实现格式转换、错误重试和安全校验,从而实现跨领域多工具协同。作者构建 SciToolEval 基准并在蛋白质工程、化学反应性预测、合成规划及 MOF 筛选等任务中验证,结果显示 SciToolAgent 在成功率与鲁棒性上显著优于现有方法。其优势在于结构化知识与 LLM 的结合及责任使用设计,但仍面临知识图谱维护、推理错误和现实环境适配等
Nature Computational Science,
2025-8-20.
DOI: 10.1038/s43588-025-00849-y
Abstract:
No abstract available.
55.
cellsarts
(2025-09-30 16:17):
#pape rMarine GenomicsDOI:10.1016/j.margen.2023.1010452023-05-26 基于宏基因组分析的西南印度洋深海沉积物中固碳微生物及其固碳途径 化学自养微生物在黑暗海洋中的碳固定对海洋初级生产和全球碳循环做出了巨大贡献。与海洋光合作用区占主导地位的卡尔文循环不同,深海区域的碳固定途径及其宿主是多样化的。在这项研究中,收集了西南印度洋靠近热液喷口的四个深海沉积物样本,并使用宏基因组分析处理,以研究碳固定潜力。功能注释显示,所有六种碳固定途径在样本中都有不同程度的基因存在。还原型三羧酸循环和卡尔文循环基因在所有样本中都有出现,与先前研究发现主要存在于热液区域的伍德-隆德哈德途径相反。注释还阐明了与六种碳固定途径相关的化学自养微生物成员,其中大多数含有关键碳固定基因的属于假单胞菌门和脱硫杆菌门。分箱宏基因组组装的基因组显示,卡尔文循环和3-羟基丙酸/4-羟基丁酸循环的关键基因也存在于罗红藻目和真菌家族Hyphomicrobiaceae中。通过识别西南印度洋热液场的碳代谢途径和微生物种群,我们的研究揭示了深海环境中复杂的生物地球化学过程,并为进一步深入研究深海生态系统的碳固定过程奠定了基础。
Xiao-Lan Yue Lin Xu Li Cui Ge-Yi Fu Xue-Wei Xu
Marine GenomicsDOI:10.1016/j.margen.2023.1010452023-05-26
56.
钟鸣
(2025-09-29 21:42):
#paper doi:10.7554/eLife.107093.3 Risk-taking incentives predict aggression heuristics in female gorillas
群体内动物间的攻击行为受攻击性启发式驱动(指导攻击谁\如何攻击的策略),一般认为动物倾向攻击更低等级个体以维持等级,且这种模式在物种内相对固定.但研究者注意到大猩猩会高频率攻击更高等级个体,因此开展了本研究.研究数据是对5个种群的31只雌性大猩猩在20年内的6800次攻击行为.
研究确认了雌性大猩猩攻击高等级个体的高频率(42%),但以轻度攻击为主.且攻击性启发式随环境动态变化:1.群体中雄性变多,则攻击增加,这或因雄性会干预被攻击者的报复,让攻击者有恃无恐.2.孕晚期者攻击性最强,或因此时对资源需求最强.研究为其他物种的攻击性启发式提供了参考,也为大猩猩的种群保护提供方法论指导.
eLife,
2025-8-22.
DOI: 10.7554/eLife.107093.3
Abstract:
Competition is commonly reflected in aggressive interactions among groupmates as individuals try to attain or maintain higher social ranks that can offer them better access to critical resources. In this …
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Competition is commonly reflected in aggressive interactions among groupmates as individuals try to attain or maintain higher social ranks that can offer them better access to critical resources. In this study, we investigate the factors that can shift competitive incentives against higher- or lower-ranking groupmates, that is, more or less powerful individuals. We use a long-term behavioural data set on five wild groups of the two gorilla species starting in 1998, and we show that most aggression is directed from higher- to lower-ranking adult females close in rank, highlighting rank-reinforcement incentives. Yet, females directed 42% of aggression to higher-ranking females than themselves. Females targeted groupmates of higher rank with increasing number of males in the group, suggesting that males might buffer female–female aggression risk. Contrarily, they targeted females of lower rank with increasing number of females in the group, potentially because this is a low-risk option that females prefer when they have access to a larger pool of competitors to choose from. Lactating and pregnant females, especially those in the latest stage of pregnancy, targeted groupmates of higher rank than the groupmates that cycling females targeted, suggesting that energetic needs may motivate females to risk confrontation with more powerful rivals. Our study provides critical insights into the evolution of competitive behaviour, showing that aggression heuristics, the simple rules that animals use to guide their aggressive interactions, are not merely species-specific but also dependent on the conditions that populations and individuals experience.
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57.
半面阳光
(2025-09-29 19:19):
#paper DOI: https://doi.org/10.1038/s41431-025-01919-5. european journal of human genetics. 2025. Clinical utility of DNA-methylation signatures in routine diagnostics for neurodevelopmental disorders. 本研究评估了DNA甲基化(DNAm)特征作为染色质调控基因变异所致发育障碍诊断工具的临床实用性。研究人员对2019年2月至2023年6月期间接受商业化EpisignTM平台DNAm特征检测的298名患者进行了回顾性分析。该队列包含75例针对既往遗传学发现的靶向分析,以及223例经前期诊断检测仍未明确的完整分析病例。结果显示,在表型匹配的DNAm特征阳性病例中,81.8%(9/11)通过回顾性分析识别出致病DNA变异或独立确诊了先前未识别的印记异常,为这些分子确诊病例提供了宝贵的诊断线索。该发现强调DNAm特征在临床实践中作为变异解读与诊断的补充方法具有重要价值。
European Journal of Human Genetics,
2025-10.
DOI: 10.1038/s41431-025-01919-5
Abstract:
No abstract available.
58.
小年
(2025-09-29 18:34):
#paper doi:10.3389/fnsys.2024.1489919,Seungho Kim, Ji-hye Kim, et al. Effect of chewing hard material on boosting brain antioxidant levels and enhancing cognitive function(Frontiers in Systems Neuroscience, 2024, Volume 18)
这篇文章比较有意思就读了一下,研究招募 52 名健康大学生,探究咀嚼硬度对脑内抗氧化物质及认知的影响。受试者随机分两组,分别咀嚼软口香糖和中等硬度木块,通过 MEGA-PRESS 技术测量咀嚼前后大脑前扣带皮层(与记忆、认知控制密切相关脑区)的谷胱甘肽(GSH,大脑核心抗氧化剂)水平,用 K-RBANS 量表评估个体的认知功能水平。结果显示,木块咀嚼组 GSH 增幅显著高于口香糖组,且 GSH 升高与记忆功能呈正相关,口香糖组无明显变化。
研究证实咀嚼中等硬度材料可通过提升脑内 GSH 改善认知,也就是说平时多嚼一嚼硬一点的东西能改善记忆力。
文章局限性也很明显,样本数量少(52人),年龄和状态集中(都是健康的大学生),干预和观测时长短(5分钟咀嚼然后测试),认知评估维度较少(仅用 K-RBANS 量表进行整体认知测评等),所以结果仅供参考。
Frontiers in Systems Neuroscience,
2024-11-27.
DOI: 10.3389/fnsys.2024.1489919
Abstract:
IntroductionChewing has been reported to enhance cognitive function through the increase in cerebral blood flow. However, the mechanisms linking cerebral blood flow increase to metabolic changes in the brain affecting …
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IntroductionChewing has been reported to enhance cognitive function through the increase in cerebral blood flow. However, the mechanisms linking cerebral blood flow increase to metabolic changes in the brain affecting cognition remain unclear. We hypothesized that glutathione (GSH) plays a pivotal role in these mechanisms. Therefore, this study aimed to investigate changes in brain GSH levels following chewing and their association with cognitive function in healthy young adults.MethodsA total of 52 university students were recruited, and the Korean version of the Repeatable Battery for the Assessment of Neuropsychological Status was used for the neurocognitive evaluations. Brain GSH levels following chewing gum or wood blocks were measured using MEscher-GArwood Point RESolved Spectroscopy (MEGA-PRESS) sequence, and their relevance to neurocognitive evaluation results was investigated.ResultsChewing significantly increased brain GSH concentration, particularly in the wood-chewing group compared to the gum-chewing group, as observed in the anterior cingulate cortex. Furthermore, the rise in GSH concentration in the wood-chewing group was positively correlated with memory function.ConclusionChewing moderately hard material elevates brain antioxidant levels such as GSH, potentially influencing cognitive function.
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59.
李翛然
(2025-09-29 01:04):
#paper Predicting protein-protein interactions in the human proteome doi.org/10.1126/science.adt1630 David baker发表了一项由美国德克萨斯大学西南医学中心领衔的重大研究成果,研究团队成功构建了全球最全面的人类蛋白质相互作用(PPI)预测模型。该工作整合了30PB基因组数据,结合深度学习技术,系统鉴定了17,849组高置信度蛋白质互作关系,其中包括3,631组全新互作,为疾病机制解析及药物研发提供了重要分子蓝图。
研究突破性地开发了omicMSA技术,显著增强共进化信号分析的灵敏度,并利用AlphaFold数据库训练新型网络RF2-PPI,实现较传统方法20倍的预测速度提升及90%的准确率。
Science,
2025-9-25.
DOI: 10.1126/science.adt1630
Abstract:
Protein-protein interactions (PPI) are essential for biological function. Coevolutionary analysis and deep learning (DL) based protein structure prediction have enabled comprehensive PPI identification in bacteria and yeast, but these approaches …
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Protein-protein interactions (PPI) are essential for biological function. Coevolutionary analysis and deep learning (DL) based protein structure prediction have enabled comprehensive PPI identification in bacteria and yeast, but these approaches have had limited success for the more complex human proteome. We overcame this challenge by enhancing the coevolutionary signals with 7-fold deeper multiple sequence alignments harvested from 30 petabytes of unassembled genomic data and developing a new DL network trained on augmented datasets of domain-domain interactions from 200 million predicted protein structures. We systematically screened 200 million human protein pairs and predicted 17,849 interactions with an expected precision of 90%, of which 3,631 interactions were not identified in previous experimental screens. Three-dimensional models of these predicted interactions provide numerous hypotheses about protein function and mechanisms of human diseases.
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60.
徐炳祥
(2025-09-28 22:58):
#paper doi: 10.1038/s42255-022-00597-7 Nature Metabolism, 2022 Targeted erasure of DNA methylation by TET3 drives adipogenic reprogramming and differentiation。DNA甲基化作为表观遗传调控的重要组成部分,其参与成脂分化过程调控的细节却一直未被研究清楚,本文借助WGBS和生物信息技术发现C/EBPδ位点的选择性去甲基化可能是促进成脂分化的关键机制,并发现DNA去甲基化酶TET3可能是这一机制的关键节点。通过细胞和动物体内的TET3异位表达实验论证了TET3在成脂分化和肥胖中的这种作用。本文是组学在代谢研究中应用的成功案例,其采用的组学技术并不先进,但给以了代谢研究以重要指引。需要说明的是,组学技术虽然正在向代谢领域快速扩散,但代谢研究者对组学和生物信息学的认知仍普遍较浅薄,应用也较初等。有合作意向的组学研究者可关注这一领域。