免疫逃逸
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Cell子刊:中山大学邓艳红/张剑威团队揭示结直肠癌免疫治疗新靶点——CTSD
生物世界· 2026-01-04 04:21
靶向 PD-1 和 PD-L1 的免疫检查点阻断 (ICB) 疗法已展现出持久的疗效,目前在多种癌症类型的治疗中占据主导地位。然而,仅有约 15% 微卫星不稳定性 高 (MSI-H) 或肿瘤突变负荷高 (TMB) 的结直肠癌 (CRC) 患者对抗 PD-1/PD-L1 疗法有响应。其余 85% 微卫星稳定 (MSS) 的结直肠癌患者对当前 的免疫疗法敏感性有限。因此,识别结直肠癌 (尤其是 MSS 型结直肠癌) 中未知的免疫逃逸和耐药机制,至关重要。 2026 年 1 月 2 日, 中山大学附属第六医院 邓艳红 、 张剑威 等在 Cell 子刊 Cell Reports Medicine 上发表了题为: Cathepsin-D-mediated MHC class I degradation contributes to immune evasion in colorectal cancer 的研究论文。 该研究表明, 组织蛋白酶 D ( Cathepsin-D, CTSD) 介导的 MHC-I 降解,有助于 结直肠癌 (尤其是 微卫星稳定型结直肠癌 ) 的免疫逃逸,而靶向 CTSD, 能够阻止免疫逃逸并增强 ...
Nature Medicine:自体多抗原靶向的T细胞疗法治疗胰腺癌
生物世界· 2026-01-04 04:21
撰文丨王聪 编辑丨王多鱼 排版丨水成文 免疫疗法 已改善了越来越多种恶性肿瘤患者的生存率,但在 胰腺导管腺癌 (PDAC) 患者中引发有效的抗肿瘤 T 细胞免疫反应却一直颇具挑战性。 胰腺导管腺癌 (PDAC) 对免疫疗法产生耐药性的因素众多,包括靶抗原表达较弱以及免疫抑制分子的频繁产生或上调,从而导致肿瘤微环境 (TME) 呈现"冷 肿瘤"状态。即使存在可靶向的抗原,其异质性表达也可能导致快速适应和靶抗原调节,从而阻碍 T 细胞单药疗法的抗肿瘤潜力。 2026 年 1 月 2 日,得克萨斯州儿童医院/休斯顿卫理公会医院/贝勒医学院的研究人员在 Nature Medicine 期刊发表了题为: Autologous multiantigen- targeted T cell therapy for pancreatic cancer: a phase 1/2 trial 的研究论文。 该论文报道了 自体多抗原靶向的 T 细胞疗法 治疗 胰腺导管腺癌 (PDAC) 的 1/2 期临床试验数据,显示出良好的安全性和可行性。 研究团队推测,即使是在经过大量前期治疗的患者中,制备靶向 PRAME、SSX2、MAGEA ...
STTT:抑制RNA结合蛋白,增强卵巢癌免疫治疗
生物世界· 2025-12-29 04:16
撰文丨王聪 编辑丨王多鱼 排版丨水成文 高级别浆液性卵巢癌 (HGSC) 占卵巢癌相关死亡病例的 70% 以上,但其治疗进展始终滞缓。在已报道的四种 HGSC 分子亚型中,C5 亚型 ( C5-HGSC ) 以高增殖性和免疫逃逸为特征,其 MHC-I/PD-L1 比率呈现不利 状态。然而,这种"免疫冷肿瘤"状态的分子驱动机制尚未明确。 德国哈勒-维滕贝格大学的研究人员在 Signal Transduction and Targeted Therapy 期刊发表了题 为: Inhibition of RNA-binding proteins enhances immunotherapy in ovarian cancer 的研究论文。 在这项最新研究中,研究团队通过整合单细胞 RNA 测序与 bulk RNA 测序数据,首次发现 RNA 结合蛋白 (RBP) 是 C5-HGSC 免疫逃逸的关键调控因子。 研究团队在 C5 样细胞模型中开展靶向功能缺失筛选,证实了 IGF2BP1 ( 胰岛素样生长因子-2 mRNA 结合蛋 白-1 ) 在体外和体内均是免疫逃逸的核心介质。从机制上来说,IGF2BP1 通过加速 I ...
新冠再来袭 专家提醒:当前正处于小波峰
Jing Ji Guan Cha Wang· 2025-05-16 00:23
Core Insights - The recent increase in COVID-19 positivity rates indicates a small peak, with notable cases leading to event cancellations, such as singer Eason Chan's concert postponement [1][2] Summary by Sections Current COVID-19 Situation - The positivity rate for COVID-19 has risen from 7.5% to 16.2% in outpatient flu-like cases and from 3.3% to 6.3% in hospitalized severe acute respiratory infection cases during the monitoring period from March 31 to May 4 [2] - Experts warn that the current wave is a small peak, with predictions that the positivity rate will decline to 8%-10% by early June and below 5% by mid to late June [5] Vulnerable Populations - Elderly individuals remain a high-risk group, with the highest positivity rates observed in those aged 60 and above during the recent monitoring period [3] - Immunocompromised individuals and those with chronic conditions are particularly at risk for severe outcomes [3][4] Virus Characteristics - The current circulating strain is primarily the NB.1 series, which shows no significant change in pathogenicity compared to previous strains, although it has a higher transmission advantage [6] - The NB.1 strain exhibits greater immune evasion capabilities but is not expected to cause more severe disease than previous variants [6] Regional Variations - Southern provinces have reported slightly higher COVID-19 positivity rates compared to northern provinces, attributed to climatic differences that favor virus transmission [7]