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CRISPR-Cas-based activation of PPARGC1A boosts endogenous mitochondria and enhances cardiac function after myocardial infarction. 基于crispr - cas的PPARGC1A激活可促进内源性线粒体,增强心肌梗死后的心功能。
IF 12.4 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-09 DOI: 10.1016/j.ymthe.2026.02.027
Mario Escobar,Saad A Malik,Mira A Srinivasa,Miguel A Mendez-Sosa,Jessica M Miller,Samantha L Lydon,Sandy N Luong,Pretty R Mathew,Riham R E Abouleisa,Suridh Chakravarty,Saliha Pathan,Tamer M A Mohamed,Ravi K Ghanta,Isaac B Hilton
Insufficient energy supply due to impaired mitochondria has emerged as a key pathological factor in the development of heart failure (HF) after myocardial infarction (MI). Unfortunately, no current therapeutic strategies directly augment myocardial energy production. While mitochondrial biogenesis is orchestrated by the activity of multiple genes, activation of PPARGC1A, a key regulator, can increase cellular mitochondria; however, supraphysiological levels of PPARGC1A result in adverse tissue remodeling and heart dysfunction. CRISPR activation (CRISPRa) technologies present a unique opportunity to address these shortcomings, as they enable tunable control over endogenous target gene expression. Here, we demonstrate that transcriptional activation of PPARGC1A using CRISPRa increases cellular mitochondria in human cell types. This effect is mediated through the activation of transcriptional programs driving mitochondrial biogenesis, mitochondrial function, and cellular bioenergetics. These activated transcriptional programs synergize to increase ATP production and reserve capacity in human cardiomyocytes. CRISPRa targeting of PPARGC1A in vivo increases cardiac mitochondria to recover heart ejection fraction in an acute MI model. Furthermore, CRISPRa acts on the adult human heart to increase PPARGC1A protein and cellular mitochondria, elevating mitochondrial function in both normal and HF-diagnosed hearts. These results provide the first proof of concept that endogenous gene activation via CRISPRa can improve heart function after MI.
线粒体受损导致的能量供应不足已成为心肌梗死(MI)后心力衰竭(HF)发展的关键病理因素。不幸的是,目前还没有直接增加心肌能量产生的治疗策略。虽然线粒体的生物发生是由多个基因的活性协调的,激活PPARGC1A,一个关键的调节,可以增加细胞线粒体;然而,PPARGC1A的超生理水平会导致不良的组织重塑和心脏功能障碍。CRISPR激活(CRISPRa)技术提供了一个独特的机会来解决这些缺点,因为它们可以对内源性靶基因表达进行可调控制。在这里,我们证明了使用CRISPRa转录激活PPARGC1A可以增加人类细胞类型中的细胞线粒体。这种效应是通过激活转录程序介导的,这些转录程序驱动线粒体生物发生、线粒体功能和细胞生物能量学。这些激活的转录程序协同增加ATP的产生和心肌细胞的储备能力。在急性心肌梗死模型中,CRISPRa靶向PPARGC1A在体内增加心脏线粒体以恢复心脏射血分数。此外,CRISPRa作用于成人心脏,增加PPARGC1A蛋白和细胞线粒体,提高正常心脏和hf诊断心脏的线粒体功能。这些结果首次证明了通过CRISPRa激活内源性基因可以改善心肌梗死后的心脏功能。
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引用次数: 0
Igniting CAR-NKT cells with IL-18. 用IL-18点燃CAR-NKT细胞。
IF 12 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-06 DOI: 10.1016/j.ymthe.2026.02.039
Xinyuan Shen, Yan-Ruide Li, Lili Yang
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引用次数: 0
Cell-free miRNAs are pharmacodynamic biomarkers for enhanced DICER activity by enoxacin in human patients with ALS. 无细胞mirna是肌萎缩性侧索硬化症患者依诺沙星增强Dicer活性的药效学生物标志物。
IF 12 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-06 DOI: 10.1016/j.ymthe.2026.03.002
Iddo Magen, Hannah Marlene Kaneb, Maria Masnata, Nisha Pulimood, Anna Emde, Angela Genge, Eran Hornstein

The activity of the RNase III enzyme DICER is downregulated in both sporadic and genetic forms of amyotrophic lateral sclerosis (ALS). Accordingly, hundreds of microRNAs (miRNAs) are broadly downregulated, leading to de-repression of their mRNA targets. Enoxacin is a fluoroquinolone that enhances DICER activity and miRNA biogenesis. Here, we tested for the first time the molecular effect of enoxacin on miRNA biogenesis in ALS patients and demonstrated that enoxacin's engagement with DICER can be pharmacodynamically monitored via miRNA levels in human subjects. In an investigator-initiated, first-in-human study (REALS1), we explored miRNAs as pharmacodynamic biomarkers of DICER activation. Patients with sporadic ALS received oral enoxacin twice daily for 30 days in a double-blind, randomized clinical trial. The study demonstrated comparable enoxacin levels in plasma and cerebrospinal fluid (CSF). Furthermore, an increase in cell-free miRNA levels in both plasma and CSF at all time points following enoxacin treatment (400 or 800 mg/day), was measured relative to baseline. Additionally, no serious adverse events were reported. In conclusion, pharmacological enhancement of DICER activity by enoxacin increases miRNA biogenesis in patients with ALS. These results support further investigation of enoxacin efficacy in larger clinical trials.

在散发性和遗传性肌萎缩性侧索硬化症(ALS)中,RNase III酶DICER的活性下调。因此,数百种microrna (mirna)被广泛下调,导致其mRNA靶标的去抑制。依诺沙星是一种增强DICER活性和miRNA生物发生的氟喹诺酮类药物。在这里,我们首次测试了依诺沙星对ALS患者miRNA生物发生的分子效应,并证明依诺沙星与DICER的结合可以通过人体受试者的miRNA水平进行药效学监测。在一项由研究者发起的首次人体研究(REALS1)中,我们探索了mirna作为DICER激活的药效学生物标志物。在一项双盲随机临床试验中,散发性ALS患者每天口服依诺沙星两次,持续30天。该研究表明血浆和脑脊液(CSF)中依诺沙星水平相当。此外,在依诺沙星治疗(400mg或800mg /天)后的所有时间点,血浆和脑脊液中无细胞miRNA水平相对于基线均有所增加。此外,没有严重不良事件的报道。综上所述,依诺沙星对DICER活性的药理学增强增加了ALS患者miRNA的生物生成。这些结果支持在更大规模的临床试验中进一步研究依诺沙星的疗效。
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引用次数: 0
Inhalable Lipid Nanoparticles for Macrophage-Specific STING Gene Editing to Ameliorate Pulmonary Fibrosis. 可吸入脂质纳米颗粒用于巨噬细胞特异性STING基因编辑以改善肺纤维化。
IF 12.4 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-06 DOI: 10.1016/j.ymthe.2026.03.003
Yangeng Wang,Xie Liu,Wenzhe Xuan,Wanling Huang,Yueqiang Zhu,Chengqiong Mao,Yang Liu
Idiopathic pulmonary fibrosis (IPF) is a progressive, fatal lung disease with limited therapeutic options. The STING signaling pathway, particularly in alveolar macrophages (AMs), has been identified as a critical driver of fibrosis. However, achieving efficient and selective drug delivery to these pathogenic macrophages in the distal lung represents the major hurdle that hinders its clinical translation. To overcome this, we employed a systematic orthogonal screening strategy to develop a macrophage-targeted lipid nanoparticle (LNP) platform. Our optimized formulation, mCas9/gSting@DOPS, demonstrated over 7-fold greater macrophage expression efficiency compared to commercial formulations and was engineered for precise in vivo Sting1 gene editing. This system leverages surface phosphatidylserine (PS) for selective uptake and encapsulates a CRISPR/Cas9 mRNA payload. Following inhalation, LNPs selectively accumulated in target macrophages within a murine model of pulmonary fibrosis. This targeted delivery resulted in effective Sting1 gene disruption, suppression of downstream STING signaling, and reduced secretion of pro-fibrotic cytokines. Functionally, treatment with mCas9/gSting@DOPS LNPs significantly attenuated collagen deposition, alleviated alveolar collapse, and remodeled the fibrotic immune microenvironment. Notably, this therapeutic approach prolonged survival without evidence of systemic toxicity. Our findings establish that our orthogonally-optimized LNP platform enables potent and clinically viable molecular therapy for IPF by efficiently targeting pulmonary macrophages.
特发性肺纤维化(IPF)是一种进行性、致死性肺部疾病,治疗方案有限。STING信号通路,特别是在肺泡巨噬细胞(AMs)中,已被确定为纤维化的关键驱动因素。然而,实现对远端肺中这些致病性巨噬细胞的有效和选择性的药物递送是阻碍其临床转化的主要障碍。为了克服这个问题,我们采用了系统的正交筛选策略来开发巨噬细胞靶向脂质纳米颗粒(LNP)平台。我们优化的配方mCas9/gSting@DOPS与商业配方相比,巨噬细胞表达效率提高了7倍以上,并被设计用于精确的体内Sting1基因编辑。该系统利用表面磷脂酰丝氨酸(PS)进行选择性摄取,并封装CRISPR/Cas9 mRNA有效载荷。吸入后,LNPs选择性地在肺纤维化小鼠模型的靶巨噬细胞中积累。这种靶向递送导致有效的STING 1基因破坏,抑制下游STING信号传导,减少促纤维化细胞因子的分泌。功能上,mCas9/gSting@DOPS LNPs治疗可显著减少胶原沉积,减轻肺泡塌陷,重塑纤维化免疫微环境。值得注意的是,这种治疗方法延长了生存期,没有系统性毒性的证据。我们的研究结果表明,我们的正交优化LNP平台通过有效靶向肺巨噬细胞,为IPF提供了有效和临床可行的分子治疗。
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引用次数: 0
Cross-species insights: Optimizing chimeric antigen receptor T cell therapy in humans with insights from dogs. 跨物种洞察:优化人类嵌合抗原受体T细胞治疗与见解从狗。
IF 12.4 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-06 DOI: 10.1016/j.ymthe.2026.02.037
Bin Pan,Robert Peter Gale,Zhiling Yan
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引用次数: 0
Toward a universal neuroprotective strategy for vision preservation. 寻求一种普遍的神经保护策略来保护视力。
IF 12.4 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-06 DOI: 10.1016/j.ymthe.2026.02.038
Zhiquan Liu,Siyu Chen,Yang Sun
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引用次数: 0
Targeted KEAP1 Disruption Enhances Antioxidant Defense And Mesenchymal Stromal Cell Therapy For Chronic Limb-threatening Ischemia. 靶向KEAP1破坏增强抗氧化防御和间充质间质细胞治疗慢性肢体缺血
IF 12.4 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-05 DOI: 10.1016/j.ymthe.2026.03.005
Eun Ji Shin,Yuri Choi,Eun Je Jeon,Kang-In Lee,Kyu-Jun Lee,Young Ju Son,Min Ji Son,Seokjoong Kim,Seung-Woo Cho,Jae Young Lee
Chronic limb-threatening ischemia (CLTI) is a severe vascular disorder characterized by tissue hypoxia and oxidative stress that limit the efficacy of regenerative therapies. Mesenchymal stem/stromal cells (MSCs) hold promise for CLTI treatment through paracrine angiogenic and immunomodulatory signaling, yet their survival and function are compromised in the reactive oxygen species-rich ischemic microenvironment. Here, we utilized CRISPR/Cas9 to generate a targeted knockout of Kelch-like ECH-associated protein 1 (KEAP1), the negative regulator of the antioxidant transcription factor NRF2, in human bone marrow-derived MSCs. KEAP1 editing activated the NRF2 pathway, reduced intracellular oxidative stress, and reprogrammed redox and paracrine gene networks. Edited MSCs exhibited enhanced viability, sustained secretion of proangiogenic cytokines, and improved tissue perfusion and arteriogenesis in a murine model of CLTI. These findings establish KEAP1 gene editing as a permanent, integration-free strategy to augment MSC resistance and therapeutic efficacy in oxidative ischemic environments.
慢性肢体威胁缺血(CLTI)是一种严重的血管疾病,以组织缺氧和氧化应激为特征,限制了再生治疗的效果。间充质干细胞/基质细胞(MSCs)有望通过旁分泌血管生成和免疫调节信号治疗CLTI,但它们的存活和功能在富含活性氧的缺血微环境中受到损害。在这里,我们利用CRISPR/Cas9在人骨髓源性间充质干细胞中靶向敲除kelch样ech相关蛋白1 (KEAP1), KEAP1是抗氧化转录因子NRF2的负调节因子。KEAP1编辑激活了NRF2通路,降低了细胞内氧化应激,并重新编程了氧化还原和旁分泌基因网络。在小鼠CLTI模型中,编辑的MSCs表现出增强的活力,持续分泌促血管生成细胞因子,改善组织灌注和动脉生成。这些发现表明KEAP1基因编辑是一种永久性的、无整合的策略,可以增强MSC在氧化缺血性环境中的抗性和治疗效果。
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引用次数: 0
Chenodeoxycholic acid administration redirects the bile acid synthetic pathway to limit pro-inflammatory neutrophil infiltration and alleviate colitis. 鹅去氧胆酸重新引导胆汁酸合成途径,限制促炎中性粒细胞浸润,减轻结肠炎。
IF 12.4 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-05 DOI: 10.1016/j.ymthe.2026.03.004
Wei Zhang,Xinkai Wu,Ye Feng,Luxi Yin,Jiansheng Xie,Rongjie Zhao,Guimei Wang,Bingru Lin,Zhipeng Fang,Eryun Zhang,Hongming Pan,Wendong Huang,Weidong Han
Patients with inflammatory bowel disease (IBD) exhibit a dysregulated bile acid pool, characterized by increased primary and decreased secondary bile acids, largely due to gut microbiota dysfunction. However, the impact of colitis on hepatic bile acid synthesis remains poorly understood. In this study, analyses of public datasets, in-house patient samples, and an animal model revealed that colitis enhances flux through the classical bile acid synthesis pathway while suppressing the alternative pathway. Oral administration of chenodeoxycholic acid (CDCA) redirected bile acid synthesis toward the alternative pathway and alleviated colitis in mice. Single-cell RNA sequencing and adoptive transfer experiments demonstrated that CDCA administration reduced pro-inflammatory neutrophil accumulation in the colon by downregulating epithelial-derived CXCL2, a finding validated by in vitro assays and a transgenic mouse model. Mechanistic studies further demonstrated that lithocholic acid (LCA), a CDCA metabolite in the gut, activates colonic epithelial VDR, thereby suppressing CXCL2 via NFκB inhibition. Clinical sample analyses supported these findings, showing that a higher cholic acid (CA) to CDCA ratio positively correlates with neutrophil counts and CXCL2 levels in IBD patients. Together, these findings suggest a critical role of hepatic bile acid synthesis pathways in IBD pathogenesis and highlight CDCA as a potential therapeutic candidate.
炎症性肠病(IBD)患者表现出胆汁酸池失调,其特征是原发性胆汁酸增加,继发性胆汁酸减少,主要是由于肠道微生物群功能障碍。然而,结肠炎对肝胆汁酸合成的影响仍然知之甚少。在这项研究中,对公共数据集、内部患者样本和动物模型的分析显示,结肠炎增强了通过经典胆汁酸合成途径的通量,同时抑制了替代途径。口服鹅去氧胆酸(CDCA)可使胆汁酸的合成转向另一途径,减轻小鼠结肠炎。单细胞RNA测序和过继性转移实验表明,CDCA通过下调上皮来源的CXCL2来减少结肠中促炎中性粒细胞的积累,这一发现得到了体外实验和转基因小鼠模型的验证。机制研究进一步表明,肠内CDCA代谢物石胆酸(LCA)激活结肠上皮VDR,从而通过抑制NFκB抑制CXCL2。临床样本分析支持这些发现,表明IBD患者较高的胆酸(CA) / CDCA比值与中性粒细胞计数和CXCL2水平呈正相关。总之,这些发现表明肝脏胆汁酸合成途径在IBD发病机制中的关键作用,并突出了CDCA作为潜在的治疗候选者。
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引用次数: 0
1,25D3 reprograms mitochondrial quality control via sirtuin and sensitizes glioblastoma to chemotherapy. 1,25 d3通过sirtuin重编程线粒体质量控制,并使胶质母细胞瘤对化疗敏感。
IF 12.4 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-05 DOI: 10.1016/j.ymthe.2026.03.006
Karrie M Kiang,Yixiong Shen,Yogesh K H Wong,Bo Chen,Junbo Liao,Anza Mnahal,Wanjun Tang,Zhiyuan Zhu,Shuhan Cao,Carmen S C Lo,Sang Jin Lee,Hongbo Guo,Liyang Zhang,Gilberto Ka-Kit Leung
Tumor cells adapt to therapeutic stress by preserving mitochondrial integrity through mitophagy, but excessive mitophagy can overwhelm this adaptative mechanism and precipitate mitochondrial collapse. Here, we demonstrate that 1,25-dihydroxyvitamin D3 (1,25D3) reduces glioblastoma resistance to the standard chemotherapeutics temozolomide by driving mitophagic overload and mitochondrial dysfunction. We identified mitochondrial sirtuin SIRT4 as a key downstream effector of mitochondrial metabolism and quality control triggered by 1,25D3-induced mitochondrial stress. Pharmacological levels of 1,25D3 activate mitophagy by transcriptionally upregulating SIRT4 through vitamin D receptor (VDR) signaling. SIRT4, which is frequently downregulated in glioblastoma, suppresses glioblastoma glutamine metabolism by inhibiting glutamate dehydrogenase activity and limiting α-ketoglutarate availability, thereby integrating metabolic stress with enhanced mitophagy. This VDR-SIRT4 axis shifts mitophagy from a cytoprotective process to a lethal pathway, selectively sensitizing tumor cells while sparing normal astrocytes and brain tissue. By exploiting mitochondrial quality control as a metabolic vulnerability, 1,25D3 enhances chemotherapeutic efficacy and provides a translational rationale for repurposing 1,25D3 in resistant glioblastoma.
肿瘤细胞通过线粒体自噬保持线粒体完整性来适应治疗应激,但过度的线粒体自噬会压倒这种适应机制并导致线粒体崩溃。在这里,我们证明1,25-二羟基维生素D3 (1,25 - D3)通过驱动线粒体自噬超载和线粒体功能障碍来降低胶质母细胞瘤对标准化疗药物替莫唑胺的耐药性。我们发现线粒体sirtuin SIRT4是1,25d3诱导的线粒体应激触发的线粒体代谢和质量控制的关键下游效应因子。药理学水平的1,25d3通过维生素D受体(VDR)信号通过转录上调SIRT4激活有丝分裂。SIRT4在胶质母细胞瘤中经常下调,它通过抑制谷氨酸脱氢酶活性和限制α-酮戊二酸的可用性来抑制胶质母细胞瘤谷氨酰胺代谢,从而将代谢应激与增强的线粒体自噬结合起来。这个VDR-SIRT4轴将线粒体自噬从细胞保护过程转移到致命途径,选择性地使肿瘤细胞敏感,同时保留正常的星形胶质细胞和脑组织。通过利用线粒体质量控制作为代谢易感性,1,25 d3提高了化疗疗效,并为在耐药胶质母细胞瘤中重新使用1,25 d3提供了翻译依据。
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引用次数: 0
From blind to bound: CRISPR restores IL-2 responsiveness in patient Tregs. 从失明到结合:CRISPR恢复患者Tregs的IL-2反应性
IF 12 1区 医学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Pub Date : 2026-03-04 Epub Date: 2026-02-20 DOI: 10.1016/j.ymthe.2026.02.023
Andrew D Brim, Leonardo M R Ferreira
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引用次数: 0
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Molecular Therapy
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