时间标签：数据日期 2026-10-31 · 生成时间 2026-11-01 05:30（Asia/Shanghai）｜ 检索窗口 PubMed edat 2026/10/28–2026/10/31 ｜ 情报发生日期 2026-10-31
研究问题
While intracellular DNA clearance and sensing mechanisms have been well characterized, extracellular DNA clearance and its associated sensing remain poorly understood.；Hence, we sought to explore how undigested chromatin-bound DNA affects tumor progression in a Dnase1l3-null environment.
方法
Animal experiments were conducted according to guidelines approved by the Institutional Animal Care and Use Committee of Shenzhen Majory Biotechnology Co., Ltd.；Quantification of antibody concentrations was performed using spectrophotometry, and purity was analyzed by gel electrophoresis followed by Coomassie Blue staining.；The sections were fixed and stained with an SA-β-gal (Senescence-associated β-galactosidase) staining Kit (Cell Signaling Technology) according to the instructions ().；Cell counting kit-8 (CCK-8) (#CK04, Dojindo Laboratories) solution was added into the wells, followed by a 2-hour incubation before measurement of the absorbance at 450 nm.
核心结论
However, Dnase1l3 deficiency led to increased serum autoantibodies, including anti-dsDNA and anti-chromatin antibodies, without significantly affecting total serum antibody level ().；In line with the elevated level of serum autoantibodies, Dnase1l3 deficiency also resulted in increased IgG deposition in the tumor tissue ().；Consistently, the serum level of autoantibodies was greatly reduced 2 weeks post αCD20 antibody treatment, while that of total antibody was not significantly affected (, ). ‖ 结论：Notably, although TLR9-mediated senescence is intrinsically an immune defense against genomic insults, our findings suggest that its therapeutic induction—by eliminating both Dnase1l3 and anti-DNA autoantibodies—could offer a cancer immunotherapeutic strategy by driving tumor cells into TLR9-dependent senescence and dormancy.
局限
Therefore, these qPCR data should be interpreted as relative expression trends instead of strict absolute quantitation.；Given that systemic Dnase1l3 inhibition risks autoimmunity and efficacy depends on tumor TLR9 expression, such an approach remains to be validated in future studies.
对本项目的价值
★☆☆☆☆ 相关范围内，作为背景与横向对照收录。
全文来源
PMC JATS 全文（正文 33,960 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：Clearance of extracellular DNA prevents senescence-associated antitumor immunity.
- 期刊与标识：Front Immunol · PMID 42953061 · DOI 10.3389/fimmu.2026.1965273
B 级证据分级：B 级（同行评议临床前研究，主要为动物模型）
本文核心结论来自动物模型或体外细胞学，属临床前证据，不能外推至人体。「延长健康寿命」「改善功能」等表述在小鼠中的意义，与人类临床结局之间仍有距离。
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