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Zinc accumulation-induced integrated stress response triggers β-cell identity loss 锌积累诱导的综合应激反应引发β细胞身份丧失
IF 44.1 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-28 DOI: 10.1038/s41422-026-01222-y
Qing Ma, Wenjun Xu, Xuan Wang, Haoyu Nie, Yukun Gao, Rui Hu, Zhihao Yang, Xushu Wang, Ta Na, Xiangyi Chen, Zhaoyue Wang, Minglu Xu, Li Shao, Meng Guo, Yanfang Liu, Rongrong Le, Shaorong Gao, Weida Li
Pancreatic β-cell identity loss is increasingly recognized as a critical pathogenic contributor to β-cell failure in type 2 diabetes (T2D), but the specific mechanism remains to be characterized. In this study, we demonstrate that zinc accumulation contributes to β-cell identity loss during diabetes progression in both human and mouse islets. Using a model of human embryonic stem cell-derived islets (SC-islets), we reveal that accumulated zinc triggers the integrated stress response (ISR), with elevated ATF4 expression in SC-β cells. This, in turn, initiates expression of the α cell-specific transcription factor ARX, resulting in the conversion of β cells to α cells, thus forming a zinc-ATF4-ARX regulatory axis. Like primary β cells, SC-β cells also undergo identity loss after transplantation into diabetic animals, which can be prevented by an ISR inhibitor, resulting in improved glycemic control. Furthermore, both genetic depletion and chemical inhibition of zinc accumulation effectively safeguard SC-β cells from identity loss and enhance their efficacy in diabetic animals. Our study thus reveals a pathogenic mechanism in which zinc accumulation induces β-cell identity loss through lineage-tracing approaches and proposes a protective strategy to counteract this process.
胰腺β细胞身份丧失越来越被认为是2型糖尿病(T2D)中β细胞衰竭的关键致病因素,但具体机制仍有待研究。在这项研究中,我们证明了锌的积累有助于人类和小鼠胰岛糖尿病进展过程中β细胞身份的丧失。利用人类胚胎干细胞衍生的胰岛(SC-islets)模型,我们发现积累的锌会触发综合应激反应(ISR),升高SC-β细胞中ATF4的表达。这反过来启动α细胞特异性转录因子ARX的表达,导致β细胞向α细胞转化,从而形成锌- atf4 -ARX调节轴。与原代β细胞一样,SC-β细胞在移植到糖尿病动物体内后也会经历身份丧失,这可以通过ISR抑制剂来预防,从而改善血糖控制。此外,基因耗竭和化学抑制锌积累可有效保护SC-β细胞免于身份丧失,并增强其在糖尿病动物中的作用。因此,我们的研究通过谱系追踪方法揭示了锌积累诱导β细胞身份丧失的致病机制,并提出了一种抵消这一过程的保护策略。
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引用次数: 0
The AHCY–adenosine complex rewires mRNA methylation to enhance fatty acid biosynthesis and tumorigenesis ahcy -腺苷复合体重新连接mRNA甲基化以增强脂肪酸的生物合成和肿瘤发生
IF 25.9 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-19 DOI: 10.1038/s41422-025-01213-5
Kun Liao, Fen Cao, Chen Wei, Zheng-Yu Qian, Hong-Rong Hu, Wen-Feng Pan, Zi-Qing Feng, Sen-mao Lian, Zi-Xuan Xiao, Hui Sheng, Hai-Yu Mo, Yi-Xuan Zhao, Qi-Nian Wu, Zhao-Lei Zeng, Bo Li, Rui-Hua Xu, Huai-Qiang Ju
Methionine metabolism generates the substrate S-adenosylmethionine (SAM), which regulates epigenetic modifications crucial for various cellular processes, particularly tumorigenesis. However, whether methionine metabolism involves epigenetic mechanisms independent of SAM and what roles such mechanisms play in tumorigenesis remain unclear. We show here that the adenosylhomocysteinase (AHCY)–adenosine complex increases mRNA m6A levels in a non-global manner, promoting fatty acid synthesis and tumorigenesis. Adenosine increases mRNA m6A levels by binding to the methionine metabolism enzyme AHCY to form a complex, rather than depending on adenosine receptors. The AHCY–adenosine complex facilitates AHCY dimerization, with adenosine being crucial for dimer stability. AHCY dimers hinder the binding of fat mass and obesity-associated protein (FTO) at the Q86 site to RNA containing the VWDRACH motif, increasing m6A levels and upregulating lipogenesis genes, especially ACACA and SCD1, thus leading to reprogramming of lipid metabolism. Conversely, AHCY mutants that have lost dimerization or FTO-binding ability but retain hydrolase activity suppress lipogenesis and tumor growth without significantly affecting methionine catabolism mediated by AHCY. Loss of AHCY in mice and disruption of AHCY dimerization in tumor cells and patient-derived xenograft models restricted tumor growth. Our findings demonstrate a key SAM-independent link between methionine metabolism and mRNA m6A modification that affects demethylase substrate specificity. This novel link between the methionine cycle and lipid metabolism suggests new strategies for anticancer therapy.
蛋氨酸代谢产生底物s -腺苷蛋氨酸(SAM), SAM调节表观遗传修饰,对各种细胞过程,特别是肿瘤发生至关重要。然而,蛋氨酸代谢是否涉及独立于SAM的表观遗传机制以及这些机制在肿瘤发生中起什么作用仍不清楚。我们在这里表明,腺苷高半胱氨酸酶(AHCY) -腺苷复合物以非全局方式增加mRNA m6A水平,促进脂肪酸合成和肿瘤发生。腺苷通过与蛋氨酸代谢酶AHCY结合形成复合物而不是依赖于腺苷受体,从而增加mRNA m6A水平。AHCY -腺苷复合物促进AHCY二聚化,腺苷对二聚体的稳定性至关重要。AHCY二聚体阻碍Q86位点脂肪质量和肥胖相关蛋白(FTO)与含有VWDRACH基序的RNA的结合,增加m6A水平,上调脂肪生成基因,特别是ACACA和SCD1,从而导致脂质代谢重编程。相反,失去二聚体或fto结合能力但保留水解酶活性的AHCY突变体可以抑制脂肪生成和肿瘤生长,而不会显著影响AHCY介导的蛋氨酸分解代谢。小鼠AHCY的缺失和肿瘤细胞和患者来源的异种移植模型中AHCY二聚体的破坏限制了肿瘤的生长。我们的研究结果表明,蛋氨酸代谢和mRNA m6A修饰之间存在一个关键的sam独立联系,影响去甲基化酶底物特异性。这种蛋氨酸循环和脂质代谢之间的新联系为抗癌治疗提供了新的策略。
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引用次数: 0
Boosting immunotherapy by restoring cryptic APC function 通过恢复隐蔽性APC功能促进免疫治疗。
IF 25.9 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-16 DOI: 10.1038/s41422-026-01219-7
Wonhwa Cho
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引用次数: 0
Efficient chemical reprogramming of human T cells to pluripotent stem cells 人类T细胞转化为多能干细胞的高效化学重编程。
IF 25.9 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-16 DOI: 10.1038/s41422-025-01216-2
Yanglu Wang, Fangqi Peng, Ruoqi Cheng, Jingran Zeng, Weizhen Zeng, Jingping Mao, Xiaodi Fu, Guanxian Chen, Tianxing Liu, Zhihan Yang, Cheng Li, Bei Liu, Jingyang Guan, Lin Cheng, Hongkui Deng
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引用次数: 0
Gut dysbiosis in oncology: a risk factor for immunoresistance 肿瘤学中的肠道生态失调:免疫抵抗的危险因素。
IF 25.9 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-14 DOI: 10.1038/s41422-025-01212-6
Andrew Allan Almonte, Simon Thomas, Valerio Iebba, Guido Kroemer, Lisa Derosa, Laurence Zitvogel
The gut microbiome is recognized as a determinant of response to immune checkpoint inhibitor (ICI) therapies in cancer. However, the clinical translation of microbiome science has been hampered by inconsistent definitions of dysbiosis, inadequate biomarker frameworks, and limited mechanistic understanding. In this review, we synthesize the current state of knowledge on how gut microbial composition and function influence ICI efficacy, highlighting both correlative and causal evidence. We discuss computational approaches based on α-diversity or taxonomic abundance and argue for more functionally and clinically informative models, such as the topological score (TOPOSCORE) and other dysbiosis indices derived from machine learning. Using retrospective analyses of metagenomic datasets from thousands of patients and healthy controls, we examine microbial patterns that distinguish responders from non-responders. We also explore how dysbiosis perturbs immunoregulatory pathways, including bile acid metabolism, gut permeability, and mucosal immunomodulation. Finally, we assess emerging therapeutic strategies aimed at correcting microbiome dysfunction — including dietary modification, bacterial consortia, and fecal microbiota transplantation — and describe how they are being deployed in multiple clinical trials. We conclude with a brief discussion of the ONCOBIOME initiative, which works with international partners to incorporate microbiome science into oncology workflows. By refining our understanding of gut–immune interactions and translating it into action, microbiome-informed oncology may unlock new therapeutic potential for patients previously resistant to immunotherapy.
肠道微生物组被认为是癌症免疫检查点抑制剂(ICI)治疗反应的决定因素。然而,微生物组科学的临床翻译一直受到不一致的生态失调定义、不充分的生物标志物框架和有限的机制理解的阻碍。在这篇综述中,我们综合了目前关于肠道微生物组成和功能如何影响ICI疗效的知识状况,强调了相关和因果证据。我们讨论了基于α-多样性或分类丰度的计算方法,并提出了更多功能和临床信息模型,如拓扑评分(TOPOSCORE)和其他来自机器学习的生态失调指数。通过对来自数千名患者和健康对照的宏基因组数据集的回顾性分析,我们研究了区分应答者和无应答者的微生物模式。我们还探讨了生态失调如何扰乱免疫调节途径,包括胆汁酸代谢、肠道通透性和粘膜免疫调节。最后,我们评估了旨在纠正微生物组功能障碍的新兴治疗策略-包括饮食调整,细菌群落和粪便微生物群移植-并描述了它们如何在多个临床试验中部署。最后,我们简要讨论了ONCOBIOME计划,该计划与国际合作伙伴合作,将微生物组科学纳入肿瘤学工作流程。通过完善我们对肠道免疫相互作用的理解并将其转化为行动,微生物组信息肿瘤学可能为以前对免疫治疗有耐药性的患者释放新的治疗潜力。
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引用次数: 0
Lactate-activated GPR81/FARP1 signaling drives insulin-independent glucose uptake and metabolic control 乳酸激活的GPR81/FARP1信号驱动胰岛素不依赖的葡萄糖摄取和代谢控制
IF 25.9 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-13 DOI: 10.1038/s41422-025-01207-3
Yaxin Niu, Shengmin Hu, Yanfeng Zhang, Jinbao Yang, Jiarui Zhang, Ruiping He, Li Chen, Lin Xu, Hongfang Zhao, Bing Gan, Ruobing Ren, Ruth J. F. Loos, Haobin Ye, Xingrong Du, Tongjin Zhao, Peng Li, Antonio Vidal-Puig, Linzhang Huang
Insulin-stimulated glucose uptake is central to global carbohydrate metabolism, yet metabolites that enhance glucose uptake independently of insulin remain undefined. Here, we identify L-lactate as an insulin-independent regulator of glucose uptake that mitigates hyperglycemia. Loss of LDHA in muscle reduces lactate production, impairing glucose homeostasis in mice. By contrast, lactate administration or genetic upregulation of lactate production improves glucose control. Knockout of the lactate receptor GPR81 in skeletal muscle worsens glucose tolerance, whereas its ectopic expression or pharmacological activation enhances carbohydrate metabolism. Mechanistically, GPR81 recruits FARP1 to activate RAC1, promoting GLUT4 translocation independently of insulin signaling. Notably, the expression of LDHA, GPR81, and FARP1 is upregulated after exercise, and GPR81 variants are highly correlated with fasting insulin levels in humans, underscoring the synergy of the GPR81-FARP1-GLUT4 axis with insulin in glucose regulation. Our findings suggest that targeting GPR81 represents a potential insulin-independent strategy for the treatment of hyperglycemia.
胰岛素刺激的葡萄糖摄取是全球碳水化合物代谢的核心,然而,独立于胰岛素而增强葡萄糖摄取的代谢物仍未明确。在这里,我们确定l -乳酸作为胰岛素不依赖的葡萄糖摄取调节剂,减轻高血糖。肌肉中LDHA的损失减少了乳酸的产生,损害了小鼠的葡萄糖稳态。相比之下,乳酸管理或乳酸产生的基因上调可改善葡萄糖控制。骨骼肌中乳酸受体GPR81的敲除会恶化葡萄糖耐量,而其异位表达或药理激活会增强碳水化合物代谢。在机制上,GPR81招募FARP1激活RAC1,独立于胰岛素信号传导促进GLUT4易位。值得注意的是,运动后LDHA、GPR81和FARP1的表达上调,GPR81变异体与人体空腹胰岛素水平高度相关,强调了GPR81-FARP1- glut4轴与胰岛素在葡萄糖调节中的协同作用。我们的研究结果表明,靶向GPR81代表了治疗高血糖的潜在胰岛素不依赖型策略。
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引用次数: 0
Mitochondria target the plasma membrane to cause mitoxyperiosis. 线粒体以质膜为靶点,引起有丝分裂。
IF 44.1 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-13 DOI: 10.1038/s41422-025-01215-3
Jaiya Randhawa,Luke A J O'Neill
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引用次数: 0
Gz and β-arrestin 1 signaling in the μ-opioid receptor Gz和β-阻滞蛋白1信号在μ-阿片受体中的作用。
IF 25.9 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-09 DOI: 10.1038/s41422-025-01214-4
Zhi Cheng, Bryan L. Roth
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引用次数: 0
Transient mechanical activation of the Piezo1 channel facilitates ex vivo expansion of hematopoietic stem cells Piezo1通道的瞬时机械激活促进了造血干细胞的体外扩增
IF 44.1 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-09 DOI: 10.1038/s41422-025-01209-1
Qiwei Wang, Xin Zeng, Haoxiang Yang, Huan Lu, Lingli Jiang, Lizhen Xu, Jinxin Li, Jingyi Li, Yingli Han, Xiaoyan Wu, Yuanhong Zhou, Xiaolan Chen, Yanmin Zhao, Jimin Shi, Yi Luo, Fang Ni, Jie Sun, Qian Zhao, Fan Yang, Peng Xia, Hongyuan Jiang, He Huang, Pengxu Qian
Achieving long-term ex vivo expansion of functional hematopoietic stem cells (HSCs) is essential for advancing HSC-based clinical therapies. Although mechanosensitive ion channels are known to play key roles in the hematopoietic system, their involvement in HSC expansion remains unclear. Here, we show that Piezo1 is highly expressed in HSCs. Both genetic deletion and prolonged chemical activation of Piezo1 impair cultured HSC function, indicating that transient mechanical activation of Piezo1 is required for maintenance of HSCs in culture. To achieve this, we screened various microspheres and found that PS500 (500-nm polystyrene microspheres) significantly enhanced ex vivo expansion of mouse bone marrow HSCs with long-term repopulating capacity. PS500 also expanded human umbilical cord blood HSCs capable of engraftment in immunodeficient mice. Mechanistically, PS500 activates Piezo1, triggering Ca2+-dependent expression of proliferative cytokines and subsequent STAT3 activation, which support HSC self-renewal and proliferation. Together, these findings show that PS500 enables transient Piezo1 activation and efficient, non-toxic expansion of functional HSCs, offering a promising approach for the generation of transplantable HSCs for clinical use.
实现功能性造血干细胞(hsc)的长期体外扩增对于推进基于hsc的临床治疗至关重要。虽然已知机械敏感离子通道在造血系统中起关键作用,但它们在HSC扩增中的作用尚不清楚。在这里,我们发现Piezo1在造血干细胞中高度表达。基因缺失和Piezo1的长时间化学激活都会损害培养的HSC功能,这表明在培养中维持HSC需要Piezo1的短暂机械激活。为了实现这一目标,我们筛选了各种微球,发现PS500(500纳米聚苯乙烯微球)显著增强了小鼠骨髓造血干细胞的体外扩增和长期再生能力。PS500还扩增了人类脐带血造血干细胞在免疫缺陷小鼠体内的移植能力。在机制上,PS500激活Piezo1,触发Ca2+依赖性增殖细胞因子的表达和随后的STAT3激活,从而支持HSC自我更新和增殖。总之,这些发现表明PS500能够瞬时激活Piezo1并有效、无毒地扩增功能性造血干细胞,为临床应用的可移植造血干细胞的产生提供了一种有希望的方法。
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引用次数: 0
R-loops orchestrate RNAPII transcriptional reprogramming for the maternal-to-zygotic transition r -环协调RNAPII转录重编程,以实现母体到合子的转变
IF 25.9 1区 生物学 Q1 CELL BIOLOGY Pub Date : 2026-01-09 DOI: 10.1038/s41422-025-01208-2
Yaoyi Li, Qing Li, Xinxiu Wang, Chao Di, Yingliang Sheng, Ying Ma, Junzhi Liao, Qingqing Cai, Sainan Huang, Jiayu Chen, Guangming Wu, Lingling Zhang, Guangjin Pan, Shaorong Gao, Hongjie Yao
R-loops are pervasive genomic structures that link epigenetic modification and transcriptional regulation. However, the functional roles and regulatory mechanisms of R-loops during preimplantation development in mammals remain unexplored. Here, we reveal that the reprogramming of R-loops across developmental stages depends on CG density, with CG-poor R-loops more stage specific and strongly associated with early embryonic development. Loss of CG-poor R-loops causes severe defects in the maternal-to-zygotic transition (MZT) and preimplantation embryo development. This abnormal maintenance of CG-poor R-loops promotes premature activation of major zygotic genome activation (ZGA) genes. CG-poor R-loops inhibit DDX21 helicase activity on the 7SK/HEXIM1 snRNP complex, restricting CDK9 release and subsequent phosphorylation of Ser2 at the C-terminal domain of RNA polymerase II (RNAPII S2p) — the biochemical hallmark of pause release — thus enforcing RNAPII accumulation at major ZGA gene promoters to ensure productive transcription. These findings establish R-loops as direct modulators of RNAPII pause release, promoting the temporal fidelity of gene expression during the MZT.
r环是普遍存在的基因组结构,连接表观遗传修饰和转录调控。然而,r环在哺乳动物着床前发育中的功能作用和调控机制仍未被探索。在这里,我们发现r环在发育阶段的重编程取决于CG密度,CG差的r环更具阶段特异性,与早期胚胎发育密切相关。缺少CG-poor R-loops会导致母体到受精卵转变(MZT)和着床前胚胎发育的严重缺陷。这种异常维持的cg -差r环促进了主要合子基因组激活(ZGA)基因的过早激活。CG-poor R-loops抑制7SK/HEXIM1 snRNP复合物上的DDX21解旋酶活性,限制CDK9的释放和随后RNA聚合酶II (RNAPII S2p) c端区域Ser2的磷酸化(暂停释放的生化标志),从而加强RNAPII在主要ZGA基因启动子处的积累,以确保高效转录。这些发现表明r环是RNAPII暂停释放的直接调节剂,促进了MZT期间基因表达的时间保真度。
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引用次数: 0
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Cell Research
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