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南京鼓楼医院林炜团队NC:AKK菌膜蛋白Amuc_1098或可缓解急性胰腺炎 | 热心肠日报

  • 2026-05-09 12:38:05
南京鼓楼医院林炜团队NC:AKK菌膜蛋白Amuc_1098或可缓解急性胰腺炎 | 热心肠日报
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本文要点

IF: 15.7
The membrane protein Amuc_1098 from Akkermansia muciniphila alleviates acute pancreatitis via TLR2 signaling and glycerophospholipid metabolism remodeling
Lijuan WangRuilin Zhang赵良涛
Liuxiang XiaoXiaoyan ZhangLingyi LiuJiaju WangKuiyuan ChenJinyang Li
章茂森李婕林炜
Article|2026-04-18|OA
10.1038/s41467-026-71140-5

背景与设计

通过多重小鼠模型、体外细胞系及患者血清多组学分析,探究嗜黏蛋白阿克曼氏菌膜蛋白Amuc_1098在急性胰腺炎中的干预效应及机制。

核心发现与意义

口服Amuc_1098通过依赖TLR2的NF-κB信号抑制、肠道屏障修复及甘油磷脂代谢重塑显著减轻急性胰腺炎,为阻断该疾病提供了潜在微生态靶点。

胰腺损伤保护

Amuc_1098预处理显著降低了模型小鼠血清淀粉酶和脂肪酶水平,减轻胰腺组织损伤,并驱动脾脏及肠道巨噬细胞浸润显著减少。

炎症信号调控

Amuc_1098部分依赖于TLR2受体显著抑制组织及细胞中NF-κB信号通路的激活,从而阻断TNF-α、IL-1β和IL-6等促炎因子的释放。

肠道屏障修复

Amuc_1098通过TLR2依赖性途径显著上调结肠组织紧密连接蛋白表达,有效修复小肠黏膜屏障。

代谢与菌群重塑

Amuc_1098显著逆转了疾病状态下异常的甘油磷脂代谢网络,并伴随变形菌门等致病菌丰度下降及肠道菌群结构的整体重塑。

核心关键词

急性胰腺炎嗜黏蛋白阿克曼氏菌Amuc_1098细菌外膜蛋白TLR2NF-κB甘油磷脂肠道屏障肠-胰腺轴肠道菌群

科普解读

来自南京鼓楼医院的林炜、李婕团队和江苏省中医院的章茂森团队近期在《Nature Communications》 期刊发表了一项关于急性胰腺炎(AP)治疗的新探索。急性胰腺炎是一种具有高死亡风险的严重炎症性疾病,其发病与肠道屏障功能损伤、菌群紊乱和脂质代谢异常密切相关。

传统疗法效果有限,而肠道微生物组——尤其是有益菌的特定蛋白组分——正成为潜在的治疗突破口。研究团队聚焦于嗜黏蛋白阿克曼氏菌分泌的一种膜蛋白Amuc_1098,揭示了它通过调控免疫信号通路重塑甘油磷脂代谢,在实验模型中有效缓解胰腺炎进程的新机制。

源于肠道菌的“抗炎信使”

该研究的核心在于,从肠道有益菌中“借用”力量来对抗胰腺炎症。嗜黏蛋白阿克曼氏菌因其改善代谢和保护肠道屏障的潜力而备受关注。研究团队选取了其外膜蛋白家族中的一员——Amuc_1098在两种经典的小鼠急性胰腺炎模型(雨蛙肽联合脂多糖诱导或L-精氨酸诱导)中,研究人员提前三周给予小鼠口服Amuc_1098蛋白。

结果显示,与未干预的胰腺炎小鼠相比,接受Amuc_1098预处理的小鼠胰腺组织水肿、坏死和炎症浸润显著减轻,血清淀粉酶和脂肪酶水平也大幅下降,表明胰腺损伤得到了有效遏制。

切断炎症的“开关”

急性胰腺炎的核心病理过程之一是失控的全身性炎症风暴。研究深入探究了Amuc_1098的作用靶点。在胰腺组织和小鼠脾脏中,团队发现Amuc_1098能显著抑制关键的NF-κB炎症信号通路的激活。这条通路好比炎症的“总开关”,一旦被过度激活,就会释放大量肿瘤坏死因子-α、白介素-1β等促炎因子。

在细胞实验中也证实,Amuc_1098处理能在剂量依赖性地降低这些促炎因子的产生。进一步机制探索指向了Toll样受体2(TLR2)。该蛋白是免疫细胞感知外界信号的重要“天线”。研究发现,Amuc1098的部分抗炎作用依赖于TLR2,因为在TLR2基因敲除小鼠中,其保护效果明显减弱。

修复受损的肠道防线

急性胰腺炎常伴随肠道屏障功能破坏,导致细菌和内毒素易位,加剧全身病情。研究团队观察到,胰腺炎小鼠的结肠紧密连接蛋白(如ZO-2、Occludin等)表达下调,而这正是维持肠道屏障完整性的关键“水泥”。

令人惊喜的是,Amuc_1098干预能显著恢复这些紧密连接蛋白的水平,并且这一修复作用在小鼠体内同样显示出对TLR2的依赖性。这意味着Amuc_1098不仅直接对抗胰腺炎症,还通过加固肠道物理屏障,切断病情恶化的潜在源头。

重塑紊乱的脂质代谢图谱

除了免疫和屏障,研究团队通过代谢组学分析,发现了Amuc_1098作用的另一个关键维度。他们比较了急性胰腺炎患者、健康志愿者以及不同处理组小鼠的血清代谢物。

分析显示,甘油磷脂代谢通路在患者和患病小鼠中都发生了显著紊乱。而口服Amuc_1098能有效纠正小鼠血清中多种甘油磷脂代谢物的异常水平,例如降低某些异常升高的溶血磷脂酰胆碱。这表明Amuc_1098的治疗效果可能与其系统性调节宿主脂质代谢平衡的能力有关。

影响肠道微生态

作为肠道菌的产物,Amuc_1098是否会影响肠道菌群本身?16S rRNA测序分析给出了肯定答案。在胰腺炎小鼠中,诸如变形菌门等一些与炎症相关的菌群丰度升高,而Amuc_1098处理能逆转这种菌群失衡的趋势

多组学关联分析进一步发现,Amuc_1098调节的特定代谢物变化与肠道中某些细菌属的丰度改变存在显著相关性,勾勒出一个由菌群蛋白、宿主代谢和免疫系统构成的复杂互作网络。

这项研究首次系统阐明了嗜黏蛋白阿克曼氏菌膜蛋白Amuc_1098在缓解急性胰腺炎中的多效性作用。它如同一把“多靶点钥匙”,同时作用于抑制NF-κB炎症通路修复肠道紧密连接以及纠正甘油磷脂代谢紊乱

尽管其作用部分依赖于TLR2,但也存在TLR2非依赖的途径,揭示了其作用机制的复杂性。这些发现为开发基于肠道菌来源活性蛋白的急性胰腺炎新型辅助治疗策略提供了坚实的实验依据和全新的思路。

图片摘要

图片由AI生成,可能有错,请谨慎辨别。

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  1. CONNECT:[ UseTime:0.000959s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001817s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000887s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000665s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001260s ]
  6. SELECT * FROM `set` [ RunTime:0.000672s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001536s ]
  8. SELECT * FROM `article` WHERE `id` = 539322 LIMIT 1 [ RunTime:0.001021s ]
  9. UPDATE `article` SET `lasttime` = 1779552297 WHERE `id` = 539322 [ RunTime:0.005180s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000791s ]
  11. SELECT * FROM `article` WHERE `id` < 539322 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001097s ]
  12. SELECT * FROM `article` WHERE `id` > 539322 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001020s ]
  13. SELECT * FROM `article` WHERE `id` < 539322 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003340s ]
  14. SELECT * FROM `article` WHERE `id` < 539322 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002216s ]
  15. SELECT * FROM `article` WHERE `id` < 539322 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004666s ]
0.120081s