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Circadian photoreceptor CRYPTOCHROME promotes wakefulness under short winter-like days via a GABAergic circuitry. 昼夜节律光感受器CRYPTOCHROME通过gaba能电路促进在短的冬季样的日子清醒。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-08 DOI: 10.7554/eLife.92608
Lixia Chen, Danya Tian, Chang Su, Luoying Zhang
{"title":"Circadian photoreceptor CRYPTOCHROME promotes wakefulness under short winter-like days via a GABAergic circuitry.","authors":"Lixia Chen, Danya Tian, Chang Su, Luoying Zhang","doi":"10.7554/eLife.92608","DOIUrl":"10.7554/eLife.92608","url":null,"abstract":"<p><p>A cardinal symptom of seasonal affective disorder (SAD, also known as winter depression) is hypersomnolence, while the cause of this 'winter sleepiness' is not known. Here, we found that lack of the circadian photoreceptor <i>cryptochrome</i> (<i>cry</i>) leads to increased sleep under short winter-like days in the fruit fly <i>Drosophila</i>, reminiscent of the hypersomnolence in SAD. CRY functions in neurons that synthesize the major inhibitory neurotransmitter GABA, including the small ventral lateral neurons, which are known to be circadian pacemakers, and downregulates the GABAergic tone. This, in turn, leads to increased neural activity of the wake-promoting large ventral lateral neurons, a subset of circadian neurons that are inhibited by GABA-A receptors. CRY protein is known to be degraded by light, thus rendering CRY to be functional within this GABAergic circuitry to enhance wakefulness only under short-day length. Taken together, we demonstrate a mechanism that specifically regulates wakefulness under short winter-like days, which may provide insights regarding the winter sleepiness in SAD.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"12 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13649261/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149134578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heterogeneity and ontogeny of mouse thymic macrophages reveal a requirement for Csf1r-expressing myeloid cells during early T cell development. 小鼠胸腺巨噬细胞的异质性和个体发生揭示了在早期T细胞发育过程中对表达csf1r的骨髓细胞的需求。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-07 DOI: 10.7554/eLife.109219
Helen Wang, Vinothkumar Rajan, Anthony Wong, Slava Epelman, Juan Carlos Zúñiga-Pflücker
{"title":"Heterogeneity and ontogeny of mouse thymic macrophages reveal a requirement for <i>Csf1r</i>-expressing myeloid cells during early T cell development.","authors":"Helen Wang, Vinothkumar Rajan, Anthony Wong, Slava Epelman, Juan Carlos Zúñiga-Pflücker","doi":"10.7554/eLife.109219","DOIUrl":"10.7554/eLife.109219","url":null,"abstract":"<p><p>Thymic macrophages (TMs) maintain tissue homeostasis by clearing the large numbers of apoptotic cells generated during T cell development, but how TM heterogeneity relates to their developmental origin and role in thymocyte maturation remains incompletely understood. Using complementary flow-cytometric, single-cell transcriptomic, and genetic approaches, we resolved two major TM populations corresponding to TIMD4<sup>+</sup> cortical and CX3CR1<sup>+</sup> medullary/cortico-medullary macrophages. TIMD4<sup>+</sup> VCAM1<sup>+</sup> TMs displayed a prominent efferocytosis and apoptotic-cell-clearance program, whereas TIMD4<sup>-</sup> VCAM1<sup>+</sup> TMs were enriched for antigen-presentation and interferon-response pathways. Fate mapping revealed unequal progenitor contributions to these populations, and CCR2 deficiency selectively reduced TIMD4<sup>-</sup> VCAM1<sup>+</sup> TMs, and thymic monocytes, supporting ongoing input from circulating precursors. Exploratory pseudotime analysis further identified a transcriptional continuum from <i>Ly6c2</i><sup>+</sup><i>Ccr2</i><sup>+</sup> monocytes toward macrophage states. Using MaFIA fetal thymic organ cultures, AP20187-mediated depletion of <i>Csf1r-</i>expressing myeloid cells reduced CD4<sup>+</sup>CD8<sup>+</sup> thymocyte differentiation and produced a coordinated accumulation of DN3 cells, loss of DN4 cells, and reduction in CD27 expression. These convergent changes identify the DN3-to-DN4 transition as a developmental stage that requires an intact <i>Csf1r</i>-expressing myeloid compartment and establish a functional connection between the thymic myeloid niche and early αβ T cell development. Together, our study refines the phenotypic and developmental organization of mouse TMs and reveals a previously underappreciated requirement for myeloid-cell support during progression through the β-selection checkpoint.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13645347/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149126937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cell-cycle-resolved Hi-C reveals unexpected plasticity of A/B compartments across interphase. 细胞周期分辨的Hi-C揭示了间期A/B区室意想不到的可塑性。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-06 DOI: 10.7554/eLife.110073
Linda Choubani, Hisashi Miura, Takako Ichinose, Asami Oji, Saori Takahashi, Rory T Cerbus, Ichiro Hiratani
{"title":"Cell-cycle-resolved Hi-C reveals unexpected plasticity of A/B compartments across interphase.","authors":"Linda Choubani, Hisashi Miura, Takako Ichinose, Asami Oji, Saori Takahashi, Rory T Cerbus, Ichiro Hiratani","doi":"10.7554/eLife.110073","DOIUrl":"10.7554/eLife.110073","url":null,"abstract":"<p><p>The spatial organization of chromatin into active (A) and inactive (B) nuclear compartments is fundamental to genome regulation, yet their cell-cycle dynamics remain largely unexplored. Most research on chromatin dynamics during the cell cycle has primarily focused on events surrounding mitosis, providing only limited insight into chromatin behavior during S-phase. To address this gap, we developed a simple, drug-free approach that combines the Fucci cell-cycle indicator with in situ Hi-C to comprehensively analyze A/B compartment dynamics throughout interphase in mouse embryonic stem cells (mESCs). Unexpectedly, and contrary to prevailing views, we found that A/B compartment strength increased abruptly upon S-phase entry, stabilized during S-phase, and subsequently declined in late S/G2. This abrupt strengthening, which we termed 'compartment maturation', required passage through the G1/S transition but was independent of active DNA synthesis. This maturation involved substantial architectural remodeling, particularly within the A compartment, which consolidated into a more organized structure as individual A domains rearranged to form long-range interactions. Moreover, compartment maturation was not limited to mESCs but was also evident across different developmental contexts in mice. Based on these observations, we propose a revised, stepwise model of nuclear compartmentalization during cell-cycle progression, consisting of four distinct stages: chromosome unfolding (G1), chromatin maturation (G1/S), stabilization (S phase), and refolding (G2). These findings reveal the unexpected plasticity of A/B compartments and underscore the G1/S transition as a critical period for their reorganization.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641764/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scanning and active sampling behaviours emerge from conserved insect neural circuits. 扫描和主动采样行为从保守的昆虫神经回路中出现。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-06 DOI: 10.7554/eLife.110165
Cody A Freas, Antoine Wystrach
{"title":"Scanning and active sampling behaviours emerge from conserved insect neural circuits.","authors":"Cody A Freas, Antoine Wystrach","doi":"10.7554/eLife.110165","DOIUrl":"10.7554/eLife.110165","url":null,"abstract":"<p><p>Navigating insects often pause and rotate to sample their surroundings, behaviours termed scanning. These and other active sampling behaviours embody navigational uncertainty and are key for spatial learning, yet their neural basis remains unclear and existing models impose scanning behaviours rather than explaining its emergence. Here, we show that desert ants' scanning dynamics can emerge spontaneously from the same conserved neural circuits used for goal-directed navigation, without requiring a specialised scanning module. We built a biologically grounded model combining central complex steering and lateral accessory lobe oscillators and added a downstream stochastic inhibition of forward speed. This minimal system produced diverse, realistic scan dynamics; saccades, fixations, and reversals, whose features were qualitatively compared to high-speed video recordings of <i>Melophorus bagoti</i> scanning. Detailed analysis of these natural scans confirmed model predictions, including how scan structure depends on oscillator phase, goal-heading deviation, and navigational uncertainty. Furthermore, the model reveals that simple modulation of forward speed unifies a broad range of behaviours across ant species, from dashes to smooth oscillatory trajectories to pirouettes and voltes. Crucially, this model suggests a distributed control principle where forward speed acts as a single adjustable parameter, for both individuals and through evolution, to regulate the balance between goal-driven exploitation and information-seeking exploration.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13641763/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NK2R signaling governs intestinal lipid mobilization and mucosal inflammation. NK2R信号调控肠道脂质动员和粘膜炎症。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-05 DOI: 10.7554/eLife.109903
Pedro A Perez, Chung-Chih Liu, Alessandra Ferrari, Nicole K Littlejohn, John Paul Kennelly, Emma Marie Robinson, Vân T B Nguyen-Tran, Jon Athanacio, Sean B Joesph, Zaid Amso, Peter Tontonoz, Supriya Srinivasan
{"title":"NK2R signaling governs intestinal lipid mobilization and mucosal inflammation.","authors":"Pedro A Perez, Chung-Chih Liu, Alessandra Ferrari, Nicole K Littlejohn, John Paul Kennelly, Emma Marie Robinson, Vân T B Nguyen-Tran, Jon Athanacio, Sean B Joesph, Zaid Amso, Peter Tontonoz, Supriya Srinivasan","doi":"10.7554/eLife.109903","DOIUrl":"https://doi.org/10.7554/eLife.109903","url":null,"abstract":"<p><p>Neuropeptidergic control of lipid metabolism is conserved and increasingly implicated in metabolic diseases, but receptor-level mechanisms remain unclear. Here, we identify the neurokinin-2 receptor (NK2R) as a central node linking tachykinin signals to intestinal lipid mobilization, epithelial composition, and mucosal inflammation. Across complementary genetic and pharmacological perturbations, modulation of NK2R drives bidirectional effects. Loss or blockade of NK2R increases postprandial triglyceridemia and expands intestinal lipid stores, whereas agonism suppresses chylomicron output, reduces adiposity, and improves glycemia in diet-induced obesity. Transcriptomic and cellular analyses indicate coordinated upregulation of lipid-metabolic programs with a concomitant dampening of immune pathways in the absence of NK2R, accompanied by sex-specific remodeling of secretory lineages and male-biased protection from colitis. NK2R signaling also shaped the fecal microbiota in a genotype- and diet-dependent manner, highlighting crosstalk among neuropeptide signaling, epithelial physiology, and host-microbe interactions. These findings position NK2R as a molecular switch for intestinal lipid handling and mucosal inflammation and suggest that NK2R-targeted agonists or antagonists could be deployed as context- and sex-dependent therapeutic strategies for metabolic disease and inflammatory bowel disease.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13638200/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A high-throughput assay for the measurement of Ca2+ oscillations and insulin release from uniformly sized mouse β-cell (MIN6) spheroids. 一种用于测量均匀大小的小鼠β细胞(MIN6)球体Ca2+振荡和胰岛素释放的高通量测定方法。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-05 DOI: 10.7554/eLife.110428
Stijn Robben, Patricia Davidson, Rita S Rodrigues Ribeiro, Thomas Voets
{"title":"A high-throughput assay for the measurement of Ca<sup>2+</sup> oscillations and insulin release from uniformly sized <i>mouse β-cell (MIN6</i>) spheroids.","authors":"Stijn Robben, Patricia Davidson, Rita S Rodrigues Ribeiro, Thomas Voets","doi":"10.7554/eLife.110428","DOIUrl":"https://doi.org/10.7554/eLife.110428","url":null,"abstract":"<p><p>Diabetes mellitus is a rapidly growing global health challenge, necessitating the development of more effective anti-diabetic therapies, including drugs that improve insulin release from pancreatic β-cells. Traditional high-throughput screening methods typically rely on 2D β-cell cultures, but such cultures do not mimic the 3D organization and cell-to-cell communication of β-cells in pancreatic islets of Langerhans. Existing 3D β-cell culture models are hindered by high costs, technical complexity, and limited compatibility with high-throughput screening platforms. In this work, we developed an approach for generating 19 homogeneously shaped pancreatic β-cell spheroids in each well of a 96-well plate, using micropatterned polyethylene glycol (PEG)-based hydrogels and murine mouse insulinoma 6 (MIN6) insulinoma cells. The uniform shape and positioning of the individual spheroids enabled the simultaneous, real-time imaging of Ca<sup>2+</sup> signals in up to 1824 independent spheroids in response to glucose and various test compounds. Using this approach, we show that increasing glucose causes concentration-dependent Ca<sup>2+</sup> oscillations in individual spheroids, that these Ca<sup>2+</sup> oscillations are sensitive to modulators of ATP-sensitive K<sup>+</sup> channels, and that the frequency of Ca<sup>2+</sup> oscillations correlates with insulin secretion. Finally, we demonstrate that the neurosteroid pregnenolone sulfate, an agonist of the cation channel TRPM3, increases the frequency of glucose-induced Ca<sup>2+</sup> oscillations and enhances insulin release; the TRPM3 antagonist isosakuranetin inhibited these responses. In conclusion, we established a cost-effective and scalable 3D β-cell platform for high-throughput screening of insulin release-modifying compounds, with potential applications in drug development and personalized medicine for the management of diabetes mellitus.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13638198/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Human CD1c-autoreactive T-cells recognise Mycobacterium tuberculosis-infected antigen-presenting cells and display cytotoxic effector programmes. 人cd1c自身反应性t细胞识别结核分枝杆菌感染的抗原呈递细胞并显示细胞毒性效应程序。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-05 DOI: 10.7554/eLife.110341
Matthew Milton, Sahar H Farag, Diana Garay-Baquero, Jennie Gullick, Kinga Niedobecka, Daniel Burns, Rita Szoke-Kovacs, Patrick Trimby-Smith, Alex Look, Richard Stopforth, Marco Lepore, David K Cole, Laura Denney, Andrew White, Sally Sharpe, Alasdair Leslie, Andres Vallejo, Liku Tezera, Paul Elkington, Salah Mansour
{"title":"Human CD1c-autoreactive T-cells recognise <i>Mycobacterium tuberculosis</i>-infected antigen-presenting cells and display cytotoxic effector programmes.","authors":"Matthew Milton, Sahar H Farag, Diana Garay-Baquero, Jennie Gullick, Kinga Niedobecka, Daniel Burns, Rita Szoke-Kovacs, Patrick Trimby-Smith, Alex Look, Richard Stopforth, Marco Lepore, David K Cole, Laura Denney, Andrew White, Sally Sharpe, Alasdair Leslie, Andres Vallejo, Liku Tezera, Paul Elkington, Salah Mansour","doi":"10.7554/eLife.110341","DOIUrl":"https://doi.org/10.7554/eLife.110341","url":null,"abstract":"<p><p>Tuberculosis (TB), caused by <i>Mycobacterium tuberculosis</i> (Mtb), remains the leading cause of death from infection globally yet the contribution of non-classical T-cell pathways to human immunity remains poorly defined. CD1c-autoreactive T-cells, which recognise self-lipids presented by the antigen-presenting molecule CD1c, are frequent in human blood but their role during infection remains unclear. Here, we investigate how CD1c-expressing antigen-presenting cells (APCs) and Mtb infection shape CD1c-autoreactive T-cell responses using engineered human APC systems, complemented by single-cell transcriptomic profiling to define the ex vivo phenotypic landscape of these T-cells. CD1c is present within human TB granulomas, whereas Mtb down-modulates CD1c expression on infected APCs, consistent with an immune evasion strategy. CD1c-autoreactive T-cells respond more strongly to Mtb-infected CD1c<sup>+</sup> APCs than to uninfected cells, exhibiting enhanced activation, cytotoxicity, and diverse cytokine secretion via CD1c-dependent recognition. Under in vitro conditions, these T-cells reduce relative Mtb burden in infected phagocytes. Single-cell RNA sequencing reveals cytotoxic effector-memory programmes and expression of antimicrobial molecules, providing a mechanistic basis for these responses. Together, these findings define a human CD1c-restricted T-cell response to Mtb-infected APCs and identify autoreactive CD1c-restricted T-cells as a candidate cellular axis for lipid-directed immunity in TB.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13638199/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The type VI secretion system governs strain maintenance in a wild mammalian gut microbiome. VI型分泌系统控制野生哺乳动物肠道微生物群的菌株维持。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-02 DOI: 10.7554/eLife.110200
Beth A Shen, Kyle L Asfahl, Bentley Lim, Savannah K Bertolli, Samuel S Minot, Matthew C Radey, Kelsi M Penewit, Billy Ngo, Stephen J Salipante, Christopher D Johnston, S Brook Peterson, Andrew L Goodman, Joseph D Mougous
{"title":"The type VI secretion system governs strain maintenance in a wild mammalian gut microbiome.","authors":"Beth A Shen, Kyle L Asfahl, Bentley Lim, Savannah K Bertolli, Samuel S Minot, Matthew C Radey, Kelsi M Penewit, Billy Ngo, Stephen J Salipante, Christopher D Johnston, S Brook Peterson, Andrew L Goodman, Joseph D Mougous","doi":"10.7554/eLife.110200","DOIUrl":"https://doi.org/10.7554/eLife.110200","url":null,"abstract":"<p><p>Bacteria inhabiting the mammalian gut coexist in dense communities where contact-dependent antagonism mechanisms are widespread. The type VI secretion system (T6SS) is an interbacterial toxin delivery pathway prevalent among gut Bacteroidales, yet its function in naturally evolved microbiomes remains poorly defined. Here, we examine the role of the T6SS in <i>Bacteroides</i> within a physiologically relevant gut community derived from wild mice (the WildR microbiome). Using newly developed genetic tools and a strategy for functional replacement of strains within the WildR community, we demonstrate that the WildR isolate <i>B. acidifaciens</i> employs a T6SS to antagonize co-resident Bacteroidales. We also show that loss of T6SS function compromises the long-term maintenance of <i>B. acidifaciens</i> in the community but not its initial colonization, establishing the system as a determinant of strain persistence. The T6SS we identified resides on an integrative and conjugative element (ICE). ICE-seq, a targeted sequencing approach, reveals that the T6SS-ICE is distributed among select <i>Bacteroidales</i> and <i>Muribaculaceae</i> species in the WildR microbiome, between which it appears to be recently exchanged. We also show that transfer of the T6SS-ICE to WildR isolate <i>Phocaeicola vulgatus</i> confers transient colonization benefits in mice, but is linked to eventual population decline. Our findings demonstrate that the T6SS can stabilize the presence of specific strains within a complex, co-evolved gut microbiome, yet its value is context dependent and constrained by the ecological and physiological landscape of the host community.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13633076/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distinct allosteric remodeling of HIV-1 Env dynamics on virions by gp41-directed antibodies reveals two modes of neutralization. gp41定向抗体对HIV-1环境动力学的不同变构重构揭示了两种中和模式。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-02 DOI: 10.7554/eLife.110887
Wang Xu, Narendra Kumar Gonepudi, Junyu Liu, Yufan He, Revansiddha Katte, Ran Wang, Harry Baffour Awuah, Yang Han, Baoshan Zhang, Jian Yu, Bo Hu, David D Ho, Priyamvada Acharya, Peter D Kwong, Maolin Lu
{"title":"Distinct allosteric remodeling of HIV-1 Env dynamics on virions by gp41-directed antibodies reveals two modes of neutralization.","authors":"Wang Xu, Narendra Kumar Gonepudi, Junyu Liu, Yufan He, Revansiddha Katte, Ran Wang, Harry Baffour Awuah, Yang Han, Baoshan Zhang, Jian Yu, Bo Hu, David D Ho, Priyamvada Acharya, Peter D Kwong, Maolin Lu","doi":"10.7554/eLife.110887","DOIUrl":"https://doi.org/10.7554/eLife.110887","url":null,"abstract":"<p><p>HIV-1 envelope glycoprotein (Env), a gp120-gp41 trimer, undergoes coordinated conformational changes that drive membrane fusion and allow immune evasion by transiently concealing neutralization-sensitive epitopes. Most broadly neutralizing antibodies (bNAbs) target gp120, whereas a distinct subset recognizes conserved gp41 regions, such as the fusion peptide and the membrane-proximal external region; however, their impact on Env dynamics and associated neutralization mechanisms remains unclear. By using bioorthogonal tagging for single-molecule FRET, we monitored real-time bNAb-induced conformational sampling of Env on intact virions. Most gp41-directed bNAbs allosterically stabilized the prefusion-closed (PC) state, whereas the bivalent 10E8.4/iMab favored both PC and CD4-bound open (predominant) states. Antibodies redistributed the conformational populations of Env with modest kinetic effects, preserving a sequential transition pathway. These findings reveal two modes of neutralization for gp41-directed antibodies, fixing the PC conformation and opening it up - in both cases, with neutralization occurring via long-range allosteric control of Env dynamics.</p>","PeriodicalId":11640,"journal":{"name":"eLife","volume":"15 ","pages":""},"PeriodicalIF":6.4,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13633075/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mapping human visual contrast sensitivity and vision loss across the visual field with model-based fMRI. 用基于模型的fMRI绘制人类视觉对比敏感度和视觉损失。
IF 6.4 1区 生物学
eLife Pub Date : 2026-10-02 DOI: 10.7554/eLife.105930
Hugo T Chow-Wing-Bom, Matteo Lisi, Noah C Benson, Freya Lygo-Frett, Patrick Yu-Wai-Man, Frederic Dick, Roni O Maimon-Mor, Tessa M Dekker
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