Core Insights - The research highlights the role of astrocytic Ca2+ signaling as a "gatekeeper" in preventing synaptic depotentiation during motor learning, significantly altering the understanding of astrocytes' function in synaptic strength maintenance and optimization [4][8]. Group 1: Mechanisms of Motor Learning - Motor learning involves the dynamic adjustment of synaptic strength, where synaptic potentiation is crucial for memory and skill formation, while synaptic depotentiation must be regulated to retain newly acquired skills [3][6]. - The study found that motor training induces synaptic potentiation in layer 5 pyramidal neurons of the mouse motor cortex, accompanied by an increase in astrocytic Ca2+ levels [6][7]. Group 2: Role of Astrocytes - Astrocytic Ca2+ activity regulates activity-dependent synaptic plasticity, and its role in learning-related synaptic changes in vivo remains unclear [6]. - Reducing astrocytic Ca2+ levels leads to synaptic depotentiation during motor training, impairing improvements in motor performance [6][7]. Group 3: Implications for Medical Research - The findings suggest potential therapeutic avenues targeting astrocytic signaling pathways for treating conditions like stroke, neurodegenerative diseases, or motor function disorders by modulating astrocytic Ca2+ or adenosine receptor activity [7][8]. - The study emphasizes the complexity and significance of glial cell interactions in functional brain plasticity, marking an exciting new chapter in neuroscience discoveries [8].

编辑丨王多鱼 排版丨水成文 近年来， 以 肥 胖 和 2 型糖尿病 为代表的 内分泌代谢系统疾病已成为严重威胁 人类 健康的重大公共卫生 问题。《 柳叶刀 》的一项研究指出， 2022 年全球肥胖人口已突破 10 亿，占全球总人口的八分之一，且 这一趋势仍在持续上升。肥胖不仅显著增加个体罹患心血管疾病、癌症等多种重大疾病的风险，也给公共 卫生体系带来了沉重负担。 2 型糖尿病在全球范围内 也 呈持续攀升趋势。国际糖尿病联盟 （ IDF ） 数据 显示， 2021 年全球 20–79 岁的成年人中约有 5.89 亿人患糖尿病，占全球成人总数约 10.5% ，预计到 2045 年患者将增至约 7.8 亿人，占比超过 12% ，这意味着几乎每 9 名成年人中就有 1 人受累，其中大 部分为 2 型糖尿病。 随着全球老龄化、城市化、久坐生活方式以及高热量饮食的普及，未来几十年， 2 型糖尿病的患病率还将 持续上升，并将带来更大的心血管、肾脏、神经及眼底疾病负担 。 内分泌代谢系统疾病迫切需要依托大规 模人群遗传学获取高质量证据，识别可用于预防、早筛与精准干预的新分子靶点。 2025 年 10 月 10 日 ，昌平实验 ...

撰文丨王聪 编辑丨王多鱼 排版丨水成文 肾细胞癌 （RCC） 是泌尿系统常见的恶性肿瘤，其确切病因仍有待探究。 肾透明细胞癌 （ccRCC） 是肾细胞癌最常见的病理类型，约占 70%。 越来越多的证据表明，作为人体关键组成部分的 肠道微生物群 在肿瘤发生以及对治疗的响应方面具有重要影响。尽管已有研究显示某些肠道微生物及其相关活性 产物与 ccRCC 的治疗有关，但肠道微生物组与 ccRCC 形成之间的关系仍不确定。因此，阐明肠道微生物组对 ccRCC 肿瘤进展的潜在影响至关重要。 2025 年 10 月 8 日，上海交通大学医学院附属 仁济医院 翟炜 研究员、上海交通大学医学院 刘尽尧 研究员团队合作，在 Cell 子刊 Cell Reports Medicine 上发 表了题为： Intestinal Lachnospiraceae bacterium -derived propionate inhibits the progression of clear cell renal cell carcinoma 的研究论文。 该研究表明，肠道细菌 Lachnospiraceae bacterium （ L. ...

Core Insights - The research team at Zhejiang University has confirmed that defects in the human gene PLD4 can lead to systemic lupus erythematosus (SLE), providing a significant theoretical basis for precise diagnosis and treatment of the disease [1][2] - The study highlights the role of genetic factors and immune abnormalities in the development of SLE, identifying a single gene mutation as a contributing factor [1] - The findings were published in the international journal "Nature," marking a notable advancement in understanding the molecular mechanisms of SLE [1] Gene Defect and Mechanism - The research identified PLD4 gene defects in five patients with lupus nephritis through whole-exome sequencing, establishing a link between PLD4 and SLE for the first time [1] - PLD4 is highly expressed in dendritic cells, B cells, and monocytes, encoding a protein that degrades single-stranded nucleic acids in lysosomes [1] - Patients with PLD4 defects exhibited enhanced immune responses via the TLR7/TLR9 signaling pathway and increased levels of various inflammatory factors [1] Mouse Model and Treatment - To investigate the pathogenic mechanism of PLD4 gene defects, the research team created a mouse model with the same genetic deficiency, which displayed typical lupus-like phenotypes [2] - Kidney inflammation was notably significant in the deficient mice, aligning closely with the clinical renal phenotype observed in human patients [2] - Treatment with the JAK inhibitor Baricitinib significantly alleviated the lupus-like phenotype in deficient mice and effectively inhibited the overactivation of the type I interferon pathway in inflammatory cells derived from patients, suggesting a potential therapeutic strategy for SLE caused by PLD4 gene defects [2]

Core Viewpoint - The research published in Molecular Cell reveals the phosphorylation hierarchy of the T cell receptor (TCR) CD3 complex, highlighting the role of lipid interactions in regulating TCR signaling diversity and suggesting that insufficient phosphorylation of CD3ζ may lead to T cell functional exhaustion [2][3]. Group 1 - The study utilized nuclear magnetic resonance, quantitative mass spectrometry, and cellular experiments to analyze the intracellular structure and phosphorylation patterns of the key signaling subunit CD3ζ in the TCR-CD3 complex [3]. - The research indicates that the basic residue-rich sequence (BRS) interacts with lipids, which is crucial for the regulation of TCR signaling [3]. - The findings suggest that chronic TCR stimulation, associated with cancer and chronic infections, leads to a faster decay of phosphorylation at the C-terminal ITAM compared to the N-terminal ITAM, resulting in insufficient TCR signaling [6][7]. Group 2 - The core findings of the study include the observation that the membrane insertion of ITAMs increases from the N-terminus to the C-terminus, and phosphorylation occurs sequentially from ITAM1 to ITAM3 under physiological stimulation [7]. - Mutations in the CD3ζ BRS eliminate the hierarchical phosphorylation of ITAMs, indicating the importance of this sequence in TCR signaling [7]. - The study provides new insights into the heterogeneity of ITAM phosphorylation in TCR signaling, which is relevant to both physiological and pathological conditions [6][7].

Core Insights - The study published in Nature Immunology reveals that chemotherapy-induced CA-repeat DNA fragments in breast cancer can trigger antitumor immune responses [3][4]. - The research highlights the relationship between genomic instability and immune regulation, emphasizing the therapeutic potential of CA-rich DNA in enhancing antitumor immunity [7]. Group 1 - The research team demonstrated that in tumors with low expression of MSH2, DNA fragments rich in CA, generated by DNA-damaging chemotherapy, preferentially bind with cGAS, leading to the formation of biomolecular condensates in the cytoplasm and triggering antitumor immune responses [7]. - In contrast, DNA fragments lacking CA released from tumors with high MSH2 expression activate AIM2, resulting in immune suppression through the upregulation of PD-L1 and IDO [7]. - The study found that the increase in CA-rich DNA fragments post-chemotherapy correlates with a rise in tumor antigen-responsive T cells and better chemotherapy responses [7]. Group 2 - The injection of CA-rich DNA fragments into tumors enhances antitumor immunity in PyMT allograft tumors [7]. - Different tumor DNA fragments can elicit opposing immune responses based on their preference for different sensors [7].

近日，首都医科大学宣武医院 郝峻巍 教授团队 在 Nature 子刊 Nature Metabolism 上发表了题为： Cholesterol metabolic reprogramming mediates microglia-induced chronic neuroinflammation and hinders neurorestoration following stroke 的研究论文。 该研究表明， 胆固醇代谢重编程 介导了小胶质细胞诱导的慢性神经炎症，并阻碍中风后的神经修复 。这一发现 为通过靶向胆固醇代谢来减轻长期脑损伤和促进 神经修复提供了新的治疗策略，有望改善中风相关的残疾结局。 撰文丨王聪 编辑丨王多鱼 排版丨水成文 大多数缺血性中风患者未能接受重组组织型纤溶酶原激活剂的溶栓治疗，原因是其治疗时间窗狭窄，仅限于发病后 4.5 小时内。相比之下，在慢性期可能存在更 宽的治疗时间窗，这为促进晚期恢复、减少中风相关残疾和复发提供了机会。因此，在慢性期针对神经修复机制进行治疗是一种很有前景的方法，有助于增强中 风幸存者的恢复能力并改善其预后。 慢性神经炎症 是中风后恢复的主要障碍，但其潜在机 ...

撰文丨王聪 编辑丨王多鱼 排版丨水成文 肾脏的 缺血再灌注损伤 （IRI） 是临床上急性肾损伤 （AKI） 的主要诱因，通常发生在肾血供中断一段时 间后恢复之时。在临床上，肾脏 IRI 是部分肾切除术、肾移植、创伤和心脏搭桥手术等常见的几乎不可避免 的病理生理后果，影响患者的预后和生活质量。遗憾的是，目前临床上预防和治疗肾脏 IRI 的有效方法寥寥 无几。 肾脏近端小管上皮细胞 （PTEC） 是肾脏 IRI 的主要靶细胞。肾脏 IRI 的病理生理机制复杂，包括能量代谢 异常、线粒体功能障碍、氧化应激以及包括细胞凋亡、铁死亡和坏死性凋亡在内的异常细胞死亡，目前尚 未完全明了。因此，揭示这些机制以探究预防和治疗肾脏 IRI 的有效策略迫在眉睫。 2025 年 9 月 25 日， 南方医科大学 吴芃 、 赵洁 、 邹志鹏 等人 在 Cell 子刊 Cell Reports Medicine 上 发表了题为： Gut symbiont-derived ursodeoxycholic acid promotes fatty acid oxidation to protect against renal ischemia ...

Core Viewpoint - The recent study from Fudan University reveals the neural mechanisms behind transcutaneous electrical nerve stimulation (TENS) for neuropathic pain relief, providing insights for optimizing pain treatment and developing new analgesic drug targets [5][9]. Group 1: Research Background - Chronic pain affects approximately 20% of the global population, significantly diminishing patients' quality of life. Current medications and therapies often have limited efficacy and notable side effects, highlighting the need for better pain relief options, including non-drug therapies [6]. - TENS is a physical therapy that alleviates pain by delivering specific frequency pulse currents through the skin to stimulate nerves [6]. Group 2: Mechanism of Action - The study found that repeated application of TENS during the early stages of nerve injury in mice activates the dorsal column nucleus (DCN)-thalamus-cortex pathway, resulting in sustained analgesic effects. This pathway is responsible for transmitting vibratory, discriminative touch, and proprioceptive sensations [6]. - Mechanistically, TENS activates low-threshold mechanoreceptors (Aβ-LTMR) in the dorsal root ganglion (DRG), selectively activating glutamatergic neurons in the DCN. These neurons project to specific glutamatergic neurons in the ventral posterolateral nucleus (VPL) of the thalamus, which differ from neurons receiving spinal dorsal horn inputs. VPL neurons form monosynaptic connections with layer 5 neurons in the somatosensory hindlimb cortex (S1HL), mediating the analgesic effects induced by TENS [7].

Core Viewpoint - The study highlights the role of LYZ2 in mediating remote injury responses in the heart, suggesting that targeting LYZ2 in endocardial cells can promote rapid recovery of non-regenerative hearts after myocardial infarction [3][4][6]. Group 1: Research Findings - Local cardiac injury leads to significantly elevated expression of Lyz2 in both the damaged area and remote regions [7]. - Lyz2 acts as a positive regulator of lysosomal degradation triggered by remote injury [7]. - Gene knockout of Lyz2 can result in rapid functional recovery after myocardial infarction [7]. - Pharmacological inhibition of lysosomal degradation has cardioprotective effects [7]. Group 2: Implications for Treatment - The findings suggest that targeting remote injury responses in non-myocyte cell types could facilitate swift recovery of non-regenerative hearts post-myocardial infarction [6][7].