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Activation of the osteoblastic HIF-1α pathway partially alleviates the symptoms of STZ-induced type 1 diabetes mellitus via RegIIIγ 通过 RegIIIγ 激活成骨细胞 HIF-1α 通路可部分缓解 STZ 诱导的 1 型糖尿病的症状。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01257-4
Minglong Qiu, Leilei Chang, Guoqing Tang, Wenkai Ye, Yiming Xu, Nijiati Tulufu, Zhou Dan, Jin Qi, Lianfu Deng, Changwei Li
The hypoxia-inducible factor-1α (HIF-1α) pathway coordinates skeletal bone homeostasis and endocrine functions. Activation of the HIF-1α pathway increases glucose uptake by osteoblasts, which reduces blood glucose levels. However, it is unclear whether activating the HIF-1α pathway in osteoblasts can help normalize glucose metabolism under diabetic conditions through its endocrine function. In addition to increasing bone mass and reducing blood glucose levels, activating the HIF-1α pathway by specifically knocking out Von Hippel‒Lindau (Vhl) in osteoblasts partially alleviated the symptoms of streptozotocin (STZ)-induced type 1 diabetes mellitus (T1DM), including increased glucose clearance in the diabetic state, protection of pancreatic β cell from STZ-induced apoptosis, promotion of pancreatic β cell proliferation, and stimulation of insulin secretion. Further screening of bone-derived factors revealed that islet regeneration-derived protein III gamma (RegIIIγ) is an osteoblast-derived hypoxia-sensing factor critical for protection against STZ-induced T1DM. In addition, we found that iminodiacetic acid deferoxamine (SF-DFO), a compound that mimics hypoxia and targets bone tissue, can alleviate symptoms of STZ-induced T1DM by activating the HIF-1α-RegIIIγ pathway in the skeleton. These data suggest that the osteoblastic HIF-1α-RegIIIγ pathway is a potential target for treating T1DM. The skeleton isn’t just for support, it also helps control body functions. This research looked at how a specific process in bone-forming cells, called the hypoxia-inducible factor-1 alpha (HIF-1α) pathway, affects sugar breakdown and diabetes. The scientists discovered that triggering this process in these cells can help manage sugar levels in diabetes through a protein named RegIIIγ. They also found that a substance named SF-DFO, which imitates low oxygen conditions and focuses on bone tissue, can somewhat ease type 1 diabetes symptoms by triggering the HIF-1α-RegIIIγ process in the skeleton. This implies that this specific process in bone-forming cells could be a possible treatment for type 1 diabetes. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
缺氧诱导因子-1α(HIF-1α)通路协调着骨骼的骨稳态和内分泌功能。激活 HIF-1α 通路可增加成骨细胞对葡萄糖的吸收,从而降低血糖水平。然而,激活成骨细胞中的 HIF-1α 通路是否能通过其内分泌功能帮助糖尿病患者实现葡萄糖代谢正常化,目前尚不清楚。通过特异性敲除成骨细胞中的Von Hippel-Lindau(Vhl)来激活HIF-1α通路,除了能增加骨量和降低血糖水平外,还能部分缓解链脲佐菌素(STZ)诱导的1型糖尿病(T1DM)的症状,包括增加糖尿病状态下的葡萄糖清除率、保护胰腺β细胞免受STZ诱导的凋亡、促进胰腺β细胞增殖以及刺激胰岛素分泌。对骨源性因子的进一步筛选发现,胰岛再生衍生蛋白Ⅲγ(RegⅢγ)是一种成骨细胞衍生的低氧传感因子,对保护STZ诱导的T1DM至关重要。此外,我们还发现亚氨基二乙酸去氧胺(SF-DFO)是一种模拟缺氧并靶向骨组织的化合物,它能通过激活骨骼中的 HIF-1α-RegIIIγ 通路来缓解 STZ 诱导的 T1DM 症状。这些数据表明,成骨细胞的 HIF-1α-RegIIIγ 通路是治疗 T1DM 的潜在靶点。
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引用次数: 0
Development of a novel testis-on-a-chip that demonstrates reciprocal crosstalk between Sertoli and Leydig cells in testicular tissue 开发新型睾丸芯片,展示睾丸组织中 Sertoli 细胞和 Leydig 细胞之间的相互串扰。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01258-3
Se-Ra Park, Myung Geun Kook, Soo-Rim Kim, Choon-Mi Lee, Jin Woo Lee, Jung-Kyu Park, Chan Hum Park, Byung-Chul Oh, YunJae Jung, In-Sun Hong
The reciprocal crosstalk between testicular Sertoli and Leydig cells plays a vital role in supporting germ cell development and maintaining testicular characteristics and spermatogenesis. Conventional 2D and the recent 3D assay systems fail to accurately replicate the dynamic interactions between these essential endocrine cells. Furthermore, most in vitro testicular tissue models lack the ability to capture the complex multicellular nature of the testis. To address these limitations, we developed a 3D multicellular testis-on-a-chip platform that effectively demonstrates the reciprocal crosstalk between Sertoli cells and the adjacent Leydig cells while incorporating various human testicular tissue constituent cells and various natural polymers infused with blood coagulation factors. Additionally, we identified SERPINB2 as a biomarker of male reproductive toxicity that is activated in both Sertoli and Leydig cells upon exposure to various toxicants. Leveraging this finding, we designed a fluorescent reporter-conjugated toxic biomarker detection system that enables both an intuitive and quantitative assessment of material toxicity by measuring the converted fluorescence intensity. By integrating this fluorescent reporter system into the Sertoli and Leydig cells within our 3D multicellular chip platform, we successfully developed a testis-on-chip model that can be utilized to evaluate the male reproductive toxicity of potential drug candidates. This innovative approach holds promise for advancing toxicity screening and reproductive research. Spermatogenesis, or sperm creation, happens in the testis and involves various cells, including Sertoli and Leydig cells. However, traditional single-cell-based 2D assay models (tests that measure the presence of a substance) don’t accurately show the complex interactions between these cells. To solve this, scientists created a ‘human testis-on-a-chip’ platform that imitates the complex cell interactions and hormone communication of seminiferous tubules (small tubes) in the testis. The chip was made using polydimethylsiloxane (a type of silicone) and included multiple testicular tissue cells. The scientists found that the chip could keep the cells alive and active for up to 28 days. Also, the chip was able to produce hormones and respond to hormonal stimulation. This study provides a useful tool for studying male reproductive biology and testing potential drugs. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
睾丸Sertoli细胞和Leydig细胞之间的相互交织在支持生殖细胞发育、维持睾丸特征和精子生成方面起着至关重要的作用。传统的二维和最新的三维检测系统无法准确复制这些重要内分泌细胞之间的动态相互作用。此外,大多数体外睾丸组织模型都无法捕捉睾丸复杂的多细胞特性。为了解决这些局限性,我们开发了一种三维多细胞睾丸芯片平台,它能有效地展示 Sertoli 细胞和邻近的 Leydig 细胞之间的相互串扰,同时结合了各种人类睾丸组织成分细胞和注入血液凝固因子的各种天然聚合物。此外,我们还发现 SERPINB2 是男性生殖毒性的生物标志物,当暴露于各种有毒物质时,Sertoli 和 Leydig 细胞中的 SERPINB2 都会被激活。利用这一发现,我们设计了一种荧光报告物共轭毒性生物标记物检测系统,通过测量转换后的荧光强度,对物质毒性进行直观和定量评估。通过将这种荧光报告系统集成到我们的三维多细胞芯片平台中的 Sertoli 细胞和 Leydig 细胞中,我们成功开发出了一种睾丸芯片模型,可用于评估潜在候选药物的男性生殖毒性。这种创新方法有望推动毒性筛选和生殖研究。
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引用次数: 0
Genome-resolved metagenomics: a game changer for microbiome medicine 基因组解析元基因组学:改变微生物组医学的游戏规则。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01262-7
Nayeon Kim, Junyeong Ma, Wonjong Kim, Jungyeon Kim, Peter Belenky, Insuk Lee
Recent substantial evidence implicating commensal bacteria in human diseases has given rise to a new domain in biomedical research: microbiome medicine. This emerging field aims to understand and leverage the human microbiota and derivative molecules for disease prevention and treatment. Despite the complex and hierarchical organization of this ecosystem, most research over the years has relied on 16S amplicon sequencing, a legacy of bacterial phylogeny and taxonomy. Although advanced sequencing technologies have enabled cost-effective analysis of entire microbiota, translating the relatively short nucleotide information into the functional and taxonomic organization of the microbiome has posed challenges until recently. In the last decade, genome-resolved metagenomics, which aims to reconstruct microbial genomes directly from whole-metagenome sequencing data, has made significant strides and continues to unveil the mysteries of various human-associated microbial communities. There has been a rapid increase in the volume of whole metagenome sequencing data and in the compilation of novel metagenome-assembled genomes and protein sequences in public depositories. This review provides an overview of the capabilities and methods of genome-resolved metagenomics for studying the human microbiome, with a focus on investigating the prokaryotic microbiota of the human gut. Just as decoding the human genome and its variations marked the beginning of the genomic medicine era, unraveling the genomes of commensal microbes and their sequence variations is ushering us into the era of microbiome medicine. Genome-resolved metagenomics stands as a pivotal tool in this transition and can accelerate our journey toward achieving these scientific and medical milestones. The human body houses numerous microbes, tiny organisms, that are vital for our health. This research aims to overcome limitations using genome-resolved metagenomics, a method that assembles complete genomes from complex microbial communities without needing to grow the organisms in a lab. The study focuses on the gut microbiome, using advanced computer methods to build metagenome-assembled genomes from DNA sequencing data. The research successfully increased the genetic diversity of the human gut microbiome by adding many new genomes to the existing database. The main findings include identifying new microbial species and expanding the genetic repertoire of known species, providing deeper understanding of the microbial diversity within the human gut. Researchers conclude that genome-resolved metagenomics is a significant advancement in microbiome research, offering understanding of microbial communities and their functions. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
最近有大量证据表明,共生细菌与人类疾病有关联,这催生了生物医学研究的一个新领域:微生物组医学。这一新兴领域旨在了解和利用人体微生物群及其衍生分子来预防和治疗疾病。尽管这一生态系统的组织结构复杂且层次分明,但多年来大多数研究都依赖于 16S 扩增子测序,这是细菌系统发育和分类学的遗产。尽管先进的测序技术能够对整个微生物群进行经济有效的分析,但直到最近,将相对较短的核苷酸信息转化为微生物群的功能和分类组织仍是一项挑战。近十年来,旨在直接从全基因组测序数据重建微生物基因组的基因组解析元基因组学取得了长足的进步,并不断揭开各种人类相关微生物群落的神秘面纱。全元基因组测序数据的数量以及在公共储存库中汇编的新型元基因组组装基因组和蛋白质序列都在迅速增加。本综述概述了基因组分辨元基因组学研究人类微生物组的能力和方法,重点是研究人类肠道的原核微生物群。正如解码人类基因组及其变异标志着基因组医学时代的开始一样,揭示共生微生物的基因组及其序列变异正把我们带入微生物组医学时代。基因组解析元基因组学是这一转变过程中的关键工具,可以加快我们实现这些科学和医学里程碑的进程。
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引用次数: 0
MAST4 regulates stem cell maintenance with DLX3 for epithelial development and amelogenesis MAST4 与 DLX3 一起调节干细胞的维持,以促进上皮发育和髓鞘形成。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01264-5
Dong-Joon Lee, Pyunggang Kim, Hyun-Yi Kim, Jinah Park, Seung-Jun Lee, Haein An, Jin Sun Heo, Min-Jung Lee, Hayato Ohshima, Seiya Mizuno, Satoru Takahashi, Han-Sung Jung, Seong-Jin Kim
The asymmetric division of stem cells permits the maintenance of the cell population and differentiation for harmonious progress. Developing mouse incisors allows inspection of the role of the stem cell niche to provide specific insights into essential developmental phases. Microtubule-associated serine/threonine kinase family member 4 (Mast4) knockout (KO) mice showed abnormal incisor development with low hardness, as the size of the apical bud was decreased and preameloblasts were shifted to the apical side, resulting in amelogenesis imperfecta. In addition, Mast4 KO incisors showed abnormal enamel maturation, and stem cell maintenance was inhibited as amelogenesis was accelerated with Wnt signal downregulation. Distal-Less Homeobox 3 (DLX3), a critical factor in tooth amelogenesis, is considered to be responsible for the development of amelogenesis imperfecta in humans. MAST4 directly binds to DLX3 and induces phosphorylation at three residues within the nuclear localization site (NLS) that promotes the nuclear translocation of DLX3. MAST4-mediated phosphorylation of DLX3 ultimately controls the transcription of DLX3 target genes, which are carbonic anhydrase and ion transporter genes involved in the pH regulation process during ameloblast maturation. Taken together, our data reveal a novel role for MAST4 as a critical regulator of the entire amelogenesis process through its control of Wnt signaling and DLX3 transcriptional activity. The research examines the function of MAST4, a protein, in tooth growth, particularly in creating enamel (the hard, outer layer of the tooth). Scientists discovered that mice without MAST4 had unusual enamel development in their front teeth, resulting in weaker teeth. The research showed that MAST4 is vital for preserving stem cells (cells that can develop into many different cell types) and controlling their transformation into ameloblasts (cells that create enamel). Without MAST4, this process was disrupted, causing early enamel release and incorrect maturation. The scientists also discovered that MAST4 controls the function of another protein, DLX3, necessary for enamel maturation. This research offers a new understanding of the molecular processes involved in tooth growth and could be significant for understanding and treating dental issues. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
干细胞的不对称分裂允许细胞群的维持和分化,以实现和谐发展。发育中的小鼠门齿可以检查干细胞龛的作用,为重要的发育阶段提供具体的见解。微管相关丝氨酸/苏氨酸激酶家族成员4(Mast4)基因敲除(KO)小鼠的门牙发育异常,硬度低,因为根尖芽的大小减小,前成釉细胞转移到根尖侧,导致成釉不全症。此外,Mast4 KO切牙的釉质成熟异常,干细胞维持受到抑制,Wnt信号下调加速了釉质形成。牙齿釉质形成过程中的一个关键因素--Distal-Less Homeobox 3(DLX3)被认为是导致人类釉质发育不全的罪魁祸首。MAST4直接与DLX3结合,并诱导核定位位点(NLS)内三个残基发生磷酸化,从而促进DLX3的核转位。MAST4 介导的 DLX3 磷酸化最终控制了 DLX3 靶基因的转录,这些基因是碳酸酐酶和离子转运体基因,参与了羊膜母细胞成熟过程中的 pH 调节过程。综上所述,我们的数据揭示了 MAST4 通过控制 Wnt 信号传导和 DLX3 转录活性在整个羊膜形成过程中扮演的关键调控者的新角色。
{"title":"MAST4 regulates stem cell maintenance with DLX3 for epithelial development and amelogenesis","authors":"Dong-Joon Lee, Pyunggang Kim, Hyun-Yi Kim, Jinah Park, Seung-Jun Lee, Haein An, Jin Sun Heo, Min-Jung Lee, Hayato Ohshima, Seiya Mizuno, Satoru Takahashi, Han-Sung Jung, Seong-Jin Kim","doi":"10.1038/s12276-024-01264-5","DOIUrl":"10.1038/s12276-024-01264-5","url":null,"abstract":"The asymmetric division of stem cells permits the maintenance of the cell population and differentiation for harmonious progress. Developing mouse incisors allows inspection of the role of the stem cell niche to provide specific insights into essential developmental phases. Microtubule-associated serine/threonine kinase family member 4 (Mast4) knockout (KO) mice showed abnormal incisor development with low hardness, as the size of the apical bud was decreased and preameloblasts were shifted to the apical side, resulting in amelogenesis imperfecta. In addition, Mast4 KO incisors showed abnormal enamel maturation, and stem cell maintenance was inhibited as amelogenesis was accelerated with Wnt signal downregulation. Distal-Less Homeobox 3 (DLX3), a critical factor in tooth amelogenesis, is considered to be responsible for the development of amelogenesis imperfecta in humans. MAST4 directly binds to DLX3 and induces phosphorylation at three residues within the nuclear localization site (NLS) that promotes the nuclear translocation of DLX3. MAST4-mediated phosphorylation of DLX3 ultimately controls the transcription of DLX3 target genes, which are carbonic anhydrase and ion transporter genes involved in the pH regulation process during ameloblast maturation. Taken together, our data reveal a novel role for MAST4 as a critical regulator of the entire amelogenesis process through its control of Wnt signaling and DLX3 transcriptional activity. The research examines the function of MAST4, a protein, in tooth growth, particularly in creating enamel (the hard, outer layer of the tooth). Scientists discovered that mice without MAST4 had unusual enamel development in their front teeth, resulting in weaker teeth. The research showed that MAST4 is vital for preserving stem cells (cells that can develop into many different cell types) and controlling their transformation into ameloblasts (cells that create enamel). Without MAST4, this process was disrupted, causing early enamel release and incorrect maturation. The scientists also discovered that MAST4 controls the function of another protein, DLX3, necessary for enamel maturation. This research offers a new understanding of the molecular processes involved in tooth growth and could be significant for understanding and treating dental issues. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.","PeriodicalId":50466,"journal":{"name":"Experimental and Molecular Medicine","volume":null,"pages":null},"PeriodicalIF":9.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11297042/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141472200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NLRP3 inflammasome: a key player in the pathogenesis of life-style disorders NLRP3炎性体:生活方式疾病发病机制中的关键角色。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01261-8
Rajath Ramachandran, Abdul Manan, Jei Kim, Sangdun Choi
Proinflammatory cytokines and chemokines play a crucial role in regulating the inflammatory response, which is essential for the proper functioning of our immune system. When infections or threats to the body’s defense mechanisms are detected, the innate immune system takes the lead. However, an excessive inflammatory response can lead to the production of high concentrations of cytotoxic molecules, resulting in tissue damage. Inflammasomes are significant contributors to innate immunity, and one of the most extensively studied inflammasome complexes is NOD-like receptor 3 (NLRP3). NLRP3 has a wide range of recognition mechanisms that streamline immune activation and eliminate pathogens. These cytosolic multiprotein complexes are composed of effector, adaptor, and sensor proteins, which are crucial for identifying intracellular bacterial breakdown products and initiating an innate immune cascade. To understand the diverse behavior of NLRP3 activation and its significance in the development of lifestyle-related diseases, one must delve into the study of the immune response and apoptosis mediated by the release of proinflammatory cytokines. In this review, we briefly explore the immune response in the context of lifestyle associated disorders such as obesity, hyperlipidemia, diabetes, chronic respiratory disease, oral disease, and cardiovascular disease. NOD-like receptors (NLRs - proteins that help our immune system fight off harmful invaders) are vital for our health. Their function in T and B cells (types of white blood cells) is less clear. Scientists have found 22 kinds of NLRs in humans, which start different immune and inflammation responses. This study is a detailed review of NLRs, examining their structure, how they are activated, and their role in diseases like obesity, diabetes, and heart problems. It emphasizes that NLRs, particularly the NLRP3 inflammasome (a protein complex involved in inflammation), are key in lifestyle diseases by causing inflammation. The review proposes that focusing on NLRP3 could lead to new treatments for these diseases. This research is a big step in understanding how our natural immune system contributes to chronic diseases and offers potential for new treatments. Future research could further explore the complexities of NLRs and their potential as treatment targets. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
促炎细胞因子和趋化因子在调节炎症反应方面起着至关重要的作用,而炎症反应对我们免疫系统的正常运作至关重要。当发现感染或身体防御机制受到威胁时,先天性免疫系统就会发挥主导作用。然而,过度的炎症反应会导致产生高浓度的细胞毒性分子,造成组织损伤。炎症小体是先天性免疫的重要贡献者,其中研究最广泛的炎症小体复合物之一是 NOD 样受体 3(NLRP3)。NLRP3 具有广泛的识别机制,能简化免疫激活并消灭病原体。这些细胞膜多蛋白复合物由效应蛋白、适配蛋白和传感蛋白组成,对于识别细胞内细菌分解产物和启动先天性免疫级联至关重要。要了解 NLRP3 激活的各种行为及其在与生活方式有关的疾病发展中的意义,就必须深入研究由促炎细胞因子释放介导的免疫反应和细胞凋亡。在这篇综述中,我们将简要探讨与肥胖、高脂血症、糖尿病、慢性呼吸道疾病、口腔疾病和心血管疾病等生活方式相关疾病有关的免疫反应。
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引用次数: 0
From inflammation to bone formation: the intricate role of neutrophils in skeletal muscle injury and traumatic heterotopic ossification 从炎症到骨形成:中性粒细胞在骨骼肌损伤和创伤性异位骨化中的复杂作用。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01270-7
Lin-Zhen Shu, Xian-Lei Zhang, Yi-Dan Ding, Hui Lin
Neutrophils are emerging as an important player in skeletal muscle injury and repair. Neutrophils accumulate in injured tissue, thus releasing inflammatory factors, proteases and neutrophil extracellular traps (NETs) to clear muscle debris and pathogens when skeletal muscle is damaged. During the process of muscle repair, neutrophils can promote self-renewal and angiogenesis in satellite cells. When neutrophils are abnormally overactivated, neutrophils cause collagen deposition, functional impairment of satellite cells, and damage to the skeletal muscle vascular endothelium. Heterotopic ossification (HO) refers to abnormal bone formation in soft tissue. Skeletal muscle injury is one of the main causes of traumatic HO (tHO). Neutrophils play a pivotal role in activating BMPs and TGF-β signals, thus promoting the differentiation of mesenchymal stem cells and progenitor cells into osteoblasts or osteoclasts to facilitate HO. Furthermore, NETs are specifically localized at the site of HO, thereby accelerating the formation of HO. Additionally, the overactivation of neutrophils contributes to the disruption of immune homeostasis to trigger HO. An understanding of the diverse roles of neutrophils will not only provide more information on the pathogenesis of skeletal muscle injury for repair and HO but also provides a foundation for the development of more efficacious treatment modalities for HO. Skeletal muscle, the body’s most common tissue, often gets injured and lacks highly effective treatments. This review investigates the complex relationship between skeletal muscle and neutrophils during injury and healing. Researchers study how neutrophils can both worsen muscle damage and assist in tissue repair. It looks at how neutrophil activity affects muscle repair, explaining the processes of inflammation, tissue regeneration, and the factors causing heterotopic ossification. It also emphasizes the significance of controlling neutrophil activity for effective muscle healing and avoiding complications. Key findings show that neutrophils are crucial in both harming and repairing skeletal muscle. Overactive neutrophils can cause extended inflammation, hindering the healing process, while controlled activity aids tissue regeneration. The researchers suggest that focusing on neutrophil activity could be a promising method for treating muscle injuries and preventing heterotopic ossification. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
中性粒细胞正在成为骨骼肌损伤和修复的重要参与者。当骨骼肌受损时,中性粒细胞会聚集在受伤组织中,从而释放炎症因子、蛋白酶和中性粒细胞胞外捕获器(NET),清除肌肉碎片和病原体。在肌肉修复过程中,中性粒细胞可促进卫星细胞的自我更新和血管生成。当中性粒细胞异常过度激活时,中性粒细胞会导致胶原蛋白沉积、卫星细胞功能受损以及骨骼肌血管内皮受损。异位骨化(HO)是指软组织中异常的骨形成。骨骼肌损伤是创伤性异位骨化(tHO)的主要原因之一。中性粒细胞在激活BMPs和TGF-β信号方面起着关键作用,从而促进间充质干细胞和祖细胞分化为成骨细胞或破骨细胞,促进HO的形成。此外,NETs会特异性地定位在HO部位,从而加速HO的形成。此外,中性粒细胞的过度激活也会破坏免疫平衡,从而引发HO。了解中性粒细胞的不同作用不仅能为骨骼肌损伤修复和HO的发病机制提供更多信息,还能为开发更有效的HO治疗方法奠定基础。
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引用次数: 0
PLD1 is a key player in cancer stemness and chemoresistance: Therapeutic targeting of cross-talk between the PI3K/Akt and Wnt/β-catenin pathways PLD1 是癌症干性和化疗耐药性的关键角色以 PI3K/Akt 和 Wnt/β-catenin 通路之间的交叉对话为治疗目标。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01260-9
Seong Hun Lim, Hyesung Lee, Hyun Ji Lee, Kuglae Kim, Junjeong Choi, Jung Min Han, Do Sik Min
The development of chemoresistance is a major challenge in the treatment of several types of cancers in clinical settings. Stemness and chemoresistance are the chief causes of poor clinical outcomes. In this context, we hypothesized that understanding the signaling pathways responsible for chemoresistance in cancers is crucial for the development of novel targeted therapies to overcome drug resistance. Among the aberrantly activated pathways, the PI3K-Akt/Wnt/β-catenin signaling pathway is clinically implicated in malignancies such as colorectal cancer (CRC) and glioblastoma multiforme (GBM). Aberrant dysregulation of phospholipase D (PLD) has been implicated in several malignancies, and oncogenic activation of this pathway facilitates tumor proliferation, stemness, and chemoresistance. Crosstalk involving the PLD and Wnt/β-catenin pathways promotes the progression of CRC and GBM and reduces the sensitivity of cancer cells to standard therapies. Notably, both pathways are tightly regulated and connected at multiple levels by upstream and downstream effectors. Thus, gaining deeper insights into the interactions between these pathways would help researchers discover unique therapeutic targets for the management of drug-resistant cancers. Here, we review the molecular mechanisms by which PLD signaling stimulates stemness and chemoresistance in CRC and GBM. Thus, the current review aims to address the importance of PLD as a central player coordinating cross-talk between the PI3K/Akt and Wnt/β-catenin pathways and proposes the possibility of targeting these pathways to improve cancer therapy and overcome drug resistance. Cancer coming back after it seemed to have gone away is a big problem in treating cancers like colorectal cancer and a brain cancer called glioblastoma multiforme. This research looks at the part played by cancer stem cells (CSCs - cells within a tumor that can self-renew and cause the cancer to grow and come back) in cancer coming back and not responding to treatment. The scientists found that a pathway in the cells, called the Wnt/β-catenin signaling pathway, is important for keeping CSCs going. They also found that an enzyme (a type of protein that speeds up reactions in the body) called phospholipase D1 (PLD1) helps control this pathway. By stopping PLD1, they could lower the ability of CSCs to keep renewing themselves and make them more responsive to chemotherapy. This means that focusing on PLD1 could be a new way to treat cancers that don’t respond to existing treatments. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
化疗耐药性的产生是临床治疗多种癌症时面临的一大挑战。干细胞和化疗耐药性是导致临床疗效不佳的主要原因。在此背景下,我们假设,了解导致癌症化疗耐药性的信号通路对于开发新型靶向疗法以克服耐药性至关重要。在异常激活的通路中,PI3K-Akt/Wnt/β-catenin 信号通路与结直肠癌(CRC)和多形性胶质母细胞瘤(GBM)等恶性肿瘤有临床关联。磷脂酶 D(PLD)的异常失调与多种恶性肿瘤有关,该通路的致癌激活促进了肿瘤的增殖、干性和化疗抗性。涉及 PLD 和 Wnt/β-catenin 通路的串扰促进了 CRC 和 GBM 的进展,并降低了癌细胞对标准疗法的敏感性。值得注意的是,这两种通路都受到上游和下游效应物的严格调控,并在多个水平上相互连接。因此,深入了解这些通路之间的相互作用将有助于研究人员发现治疗耐药性癌症的独特靶点。在此,我们综述了PLD信号刺激CRC和GBM的干性和化疗耐药性的分子机制。因此,本综述旨在探讨PLD作为协调PI3K/Akt和Wnt/β-catenin通路之间交叉对话的核心参与者的重要性,并提出针对这些通路改善癌症治疗和克服耐药性的可能性。
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引用次数: 0
PHGDH: a novel therapeutic target in cancer PHGDH:癌症的新型治疗靶点。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01268-1
Chae Min Lee, Yeseong Hwang, Minki Kim, Ye-Chan Park, Hyeonhui Kim, Sungsoon Fang
Serine is a key contributor to the generation of one-carbon units for DNA synthesis during cellular proliferation. In addition, it plays a crucial role in the production of antioxidants that prevent abnormal proliferation and stress in cancer cells. In recent studies, the relationship between cancer metabolism and the serine biosynthesis pathway has been highlighted. In this context, 3-phosphoglycerate dehydrogenase (PHGDH) is notable as a key enzyme that functions as the primary rate-limiting enzyme in the serine biosynthesis pathway, facilitating the conversion of 3-phosphoglycerate to 3-phosphohydroxypyruvate. Elevated PHGDH activity in diverse cancer cells is mediated through genetic amplification, posttranslational modification, increased transcription, and allosteric regulation. Ultimately, these characteristics allow PHGDH to not only influence the growth and progression of cancer but also play an important role in metastasis and drug resistance. Consequently, PHGDH has emerged as a crucial focal point in cancer research. In this review, the structural aspects of PHGDH and its involvement in one-carbon metabolism are investigated, and PHGDH is proposed as a potential therapeutic target in diverse cancers. By elucidating how PHGDH expression promotes cancer growth, the goal of this review is to provide insight into innovative treatment strategies. This paper aims to reveal how PHGDH inhibitors can overcome resistance mechanisms, contributing to the development of effective cancer treatments. Serine is important in DNA copying and cancer cell growth as it helps produce antioxidants and other substances. This detailed review explores the role of 3-phosphoglycerate dehydrogenase, an enzyme, in cancer, particularly its role in serine creation and its potential as a treatment target. The review combines results from different studies, using various experimental methods to understand how PHGDH affects cancer cell behavior and treatment responses. Researchers suggest that targeting PHGDH could be a promising strategy for cancer treatment, potentially improving outcomes for patients with tumors that overproduce PHGDH. The authors call for more research to fully understand PHGDH’s role in cancer and to develop effective inhibitors that could be used in clinical settings. This work advances our understanding of cancer metabolism and opens new possibilities for treatment. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
丝氨酸是细胞增殖过程中生成 DNA 合成所需的一碳单位的关键成分。此外,它还在抗氧化剂的生成过程中发挥着关键作用,而抗氧化剂能防止癌细胞的异常增殖和应激。最近的研究强调了癌症代谢与丝氨酸生物合成途径之间的关系。在这种情况下,3-磷酸甘油酸脱氢酶(PHGDH)作为丝氨酸生物合成途径中的主要限速酶,促进 3-磷酸甘油酸转化为 3-磷酸羟基丙酮酸,是一种值得注意的关键酶。不同癌细胞中 PHGDH 活性的升高是通过基因扩增、翻译后修饰、转录增加和异位调节等途径实现的。最终,这些特征使得 PHGDH 不仅能影响癌症的生长和进展,还能在转移和耐药性方面发挥重要作用。因此,PHGDH 已成为癌症研究的一个重要焦点。本综述研究了 PHGDH 的结构及其在一碳代谢中的参与,并提出 PHGDH 是多种癌症的潜在治疗靶点。通过阐明 PHGDH 的表达如何促进癌症生长,本综述旨在为创新治疗策略提供深入见解。本文旨在揭示 PHGDH 抑制剂如何克服抗药性机制,为开发有效的癌症治疗方法做出贡献。
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引用次数: 0
YAP1 inhibits the senescence of alveolar epithelial cells by targeting Prdx3 to alleviate pulmonary fibrosis YAP1 通过靶向 Prdx3 抑制肺泡上皮细胞的衰老,从而缓解肺纤维化。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01277-0
Wei Su, Yingying Guo, Qianqian Wang, Lu Ma, Qing Zhang, Yuhan Zhang, Yiding Geng, Tongzhu Jin, Jiayu Guo, Ruoxuan Yang, Zhihui Niu, Lingxue Ren, Yan Wang, Zhiwei Ning, Wenyue Li, Wenxin He, Jian Sun, Tianyu Li, Zhixin Li, Hongli Shan, Haihai Liang
The senescence of alveolar type II (AT2) cells impedes self-repair of the lung epithelium and contributes to lung injury in the setting of idiopathic pulmonary fibrosis (IPF). Yes-associated protein 1 (YAP1) is essential for cell growth and organ development; however, the role of YAP1 in AT2 cells during pulmonary fibrosis is still unclear. YAP1 expression was found to be downregulated in the AT2 cells of PF patients. Deletion of YAP1 in AT2 cells resulted in lung injury, exacerbated extracellular matrix (ECM) deposition, and worsened lung function. In contrast, overexpression of YAP1 in AT2 cells promoted alveolar regeneration, mitigated pulmonary fibrosis, and improved lung function. In addition, overexpression of YAP1 alleviated bleomycin (BLM) -induced senescence of alveolar epithelial cells both in vivo and in vitro. Moreover, YAP1 promoted the expression of peroxiredoxin 3 (Prdx3) by directly interacting with TEAD1. Forced expression of Prdx3 inhibited senescence and improved mitochondrial dysfunction in BLM-treated MLE-12 cells, whereas depletion of Prdx3 partially abrogated the protective effect of YAP1. Furthermore, overexpression of Prdx3 facilitated self-repair of the injured lung and reduced ECM deposition, while silencing Prdx3 attenuated the antifibrotic effect of YAP1. In conclusion, this study demonstrated that YAP1 alleviates lung injury and pulmonary fibrosis by regulating Prdx3 expression to improve mitochondrial dysfunction and block senescence in AT2 cells, revealing a potential novel therapeutic strategy for pulmonary fibrosis. Idiopathic pulmonary fibrosis is still not fully understood, and effective treatments are scarce. This study investigates the role of a protein, YAP1, in lung fibrosis. Researchers used mice and human lung samples to study how YAP1 influences lung cell aging and lung structure. The findings showed that increasing YAP1 levels in alveolar type II cells reduced lung fibrosis by improving the function of mitochondria and decreasing cell aging. Specifically, YAP1 worked through a pathway involving a molecule, Prdx3. However, reducing YAP1 levels worsened lung fibrosis. The researchers suggest that enhancing YAP1 activity in lung cells could be a potential treatment for lung fibrosis. This method targets lung cell aging and promotes healthy lung tissue repair. The results pave the way for developing treatments for IPF and possibly other similar lung diseases. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
肺泡II型(AT2)细胞的衰老阻碍了肺上皮细胞的自我修复,并在特发性肺纤维化(IPF)中导致肺损伤。是相关蛋白1(YAP1)对细胞生长和器官发育至关重要;然而,YAP1在肺纤维化过程中在AT2细胞中的作用仍不清楚。研究发现,肺纤维化患者的 AT2 细胞中 YAP1 表达下调。AT2 细胞中 YAP1 的缺失会导致肺损伤、细胞外基质(ECM)沉积加剧和肺功能恶化。相反,在 AT2 细胞中过表达 YAP1 可促进肺泡再生、减轻肺纤维化并改善肺功能。此外,在体内和体外,过表达 YAP1 可减轻博莱霉素(BLM)诱导的肺泡上皮细胞衰老。此外,YAP1通过与TEAD1直接相互作用,促进过氧化物酶3(Prdx3)的表达。强制表达 Prdx3 可抑制 BLM 处理的 MLE-12 细胞的衰老并改善线粒体功能障碍,而耗尽 Prdx3 则会部分削弱 YAP1 的保护作用。此外,过表达 Prdx3 可促进损伤肺的自我修复并减少 ECM 沉积,而沉默 Prdx3 则会削弱 YAP1 的抗纤维化作用。总之,这项研究表明,YAP1通过调节Prdx3的表达来改善线粒体功能障碍和阻断AT2细胞的衰老,从而缓解肺损伤和肺纤维化,为肺纤维化的治疗提供了一种潜在的新型治疗策略。
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引用次数: 0
FGFR3 drives Aβ-induced tau uptake 表皮生长因子受体 3 驱动 Aβ 诱导的 tau 摄取。
IF 9.5 2区 医学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-07-01 DOI: 10.1038/s12276-024-01274-3
Dong Kyu Kim, Kyujin Suh, Junho Park, Sang-Eun Lee, Jihui Han, Sunghoe Chang, Youngsoo Kim, Inhee Mook-Jung
The amyloid cascade hypothesis suggests that amyloid beta (Aβ) contributes to initiating subsequent tau pathology in Alzheimer’s disease (AD). However, the underlying mechanisms through which Aβ contributes to tau uptake and propagation remain poorly understood. Here, we show that preexisting amyloid pathology accelerates the uptake of extracellular tau into neurons. Using quantitative proteomic analysis of endocytic vesicles, we reveal that Aβ induces the internalization of fibroblast growth factor receptor 3 (FGFR3). Extracellular tau binds to the extracellular domain of FGFR3 and is internalized by the FGFR3 ligand, fibroblast growth factor 2 (FGF2). Aβ accelerates FGF2 secretion from neurons, thereby inducing the internalization of tau-attached FGFR3. Knockdown of FGFR3 in the hippocampus reduces tau aggregation by decreasing tau uptake and improving memory function in AD model mice. These data suggest FGFR3 in neurons as a novel tau receptor and a key mediator of Aβ-induced tau uptake in AD. Alzheimer’s disease (AD), the most common dementia leading to progressive memory loss and cognitive decline, is characterized by the accumulation of two pathological proteins in the brain: amyloid beta(Aβ) and tau. A recent study found that Aβ accelerates tau pathology in the brain, worsening AD. Using mice models, research showed that fibroblast growth factor receptor 3 (FGFR3) can act as tau receptor, and Aβ increases the tau uptake and aggregation by FGFR3 in brain cells. The findings suggest that decreasing FGFR3 could significantly lessen tau toxicity in brain cells. This could provide a new approach to slow down AD progression by targeting the early stages of tau accumulation. The study paves the way for potential treatments that could delay or prevent AD progression by targeting the early interaction between Aβ and tau. This summary was initially drafted using artificial intelligence, then revised and fact-checked by the author.
淀粉样蛋白级联假说认为,淀粉样蛋白β(Aβ)有助于引发阿尔茨海默病(AD)随后的tau病理变化。然而,人们对 Aβ 促进 tau 吸收和传播的潜在机制仍然知之甚少。在这里,我们发现,先前存在的淀粉样病理学会加速细胞外 tau 被神经元吸收。通过对内含囊泡进行定量蛋白质组学分析,我们发现 Aβ 能诱导成纤维细胞生长因子受体 3(FGFR3)的内化。细胞外 tau 与 FGFR3 的细胞外结构域结合,并被 FGFR3 配体成纤维细胞生长因子 2(FGF2)内化。Aβ 可加速神经元分泌 FGF2,从而诱导 tau 连接的 FGFR3 内化。敲除海马中的 FGFR3 可减少 tau 摄取,从而减少 tau 聚集,并改善 AD 模型小鼠的记忆功能。这些数据表明,神经元中的FGFR3是一种新型tau受体,也是AD中Aβ诱导tau吸收的关键介质。
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