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南京中医药大学 * 大理大学联合攻关!12.6 分成果破解肠炎治疗难题

  • 2026-06-02 15:56:57
南京中医药大学 * 大理大学联合攻关!12.6 分成果破解肠炎治疗难题
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01

标题相关

原标题:Calcined lotus leaf-derived carbon dots: enhanced hemostasis, anti-inflammatory, immunomodulatory properties for ulcerative colitis management

译题:煅荷叶源碳点:兼具增强止血、抗炎与免疫调节活性用于溃疡性结肠炎治疗

2

发布相关

杂志:《Journal of Nanobiotechnology

 IF:    12.6

分区: 中科院一区 

DOI:https://10.1186/s12951-026-04208-5

发表时间:2026 年 3月 1 日

后台回复获取PDF:260515

研究背景

溃疡性结肠炎(UC)作为一种反复发作的慢性炎症性肠病,以肠道黏膜持续炎症、黏膜屏障破损、便血腹泻、氧化应激失衡与免疫紊乱为核心病理特征,临床治愈率低、易复发,长期炎症刺激还可进展为结肠癌,被世界卫生组织列为现代难治性疾病。当前主流治疗药物(氨基水杨酸类、糖皮质激素、免疫抑制剂)存在疗效有限、副作用明显、难以兼顾止血、抗炎、抗氧化、修复屏障与调节菌群等多重问题。

 传统中医理论中,炭药素有 “收敛止血、止泻” 功效,高温煅制可显著增强止血止泻作用,荷叶炭更是治疗便血、泻痢的经典药食同源材料。现代纳米研究证实,中药炭药中的纳米碳点是其发挥药效的关键物质基础,具备抗炎、抗氧化、调节肠道微生态等潜力,但荷叶炭治疗 UC 的物质基础、多靶点作用机制,尤其是在止血、抗炎、免疫调控、肠道屏障修复与菌群重塑方面的协同机制尚未明确。

    近日,南京中医药大学、大理大学联合研究团队在Journal of Nanobiotechnology杂志发表了以 “Calcined lotus leaf-derived carbon dots: enhanced hemostasis, anti-inflammatory, immunomodulatory properties for ulcerative colitis management” 为题的文章,揭示了煅荷叶源碳点通过止血、抗炎、抗氧化、抑制焦亡、调节免疫与重塑肠道菌群,多通路协同治疗溃疡性结肠炎的全新机制。

01

研究方法

1. 材料与制备

原料:干荷叶;试剂:DSS、美沙拉嗪、ELISA 试剂盒、抗体等

荷叶(LL)提取:粉碎→水煎 2 次→浓缩冻干

荷叶炭(LLC)制备:密闭缺氧、马弗炉450℃煅烧 1h→粉碎→水煎提取→冻干

优化煅烧条件:350/450/550℃,0.5/1/2h,以得率、量子产率、抗氧化为指标

2. 材料表征

形貌:HRTEM、FE‑SEM

结构:UV‑Vis、FT‑IR、XRD、Raman、XPS、1H NMR

光学:荧光光谱、荧光寿命、量子产率(QY)

粒径 / 电位:DLS;稳定性:PBS、模拟胃肠液

3. 体外实验

止血:试管倒置凝血、凝血时间、凝血动力学、血小板计数、凝血四项(PT/APTT/TT/FIB)

抗氧化:DPPH・、ABTS+・、・OH、O₂−・清除率

细胞实验:CCD‑841CoN 细胞;LPS+TNF‑α 构建炎症模型;CCK‑8 测毒性;RT‑qPCR 检测 p‑NF‑κB p65、NLRP3、Caspase‑1、ASC;Western blot 检测焦亡通路

4. 体内实验

动物:C57BL/6 雄性小鼠,DSS 饮水构建 UC 模型

分组:正常组、模型组、美沙拉嗪组、低 / 高剂量 LL 组、低 / 高剂量 LLC 组

给药:第 8–14 天每日灌胃

指标:体重、DAI 评分、脏器指数、结肠长度、CMDI 评分、组织病理学(H&E、PAS)、尾断止血时间与出血量

机制:

炎症 / 氧化:ELISA 测 TNF‑α、IL‑6、IL‑1β、IFN‑γ、IL‑17;ROS、MDA、NO、HYP

焦亡通路:Western blot、免疫荧光(NLRP3、Caspase‑1、GSDMD、ASC)

免疫平衡:流式测脾脏 CD3+/CD4+/CD8+、Th17/Treg

肠道屏障:免疫荧光测 Claudin‑1、Occludin、ZO‑1

肠道菌群:宏基因组测序,α/β 多样性、物种差异分析

5. 统计分析

均值 ±SD,单因素方差分析,Tukey 检验,*P<0.05 为差异显著

02

研究结果

成功制备荷叶炭碳点

450℃ 1h 为最优条件:粒径 0.5–3nm,平均 1.72nm,分散性好

碳、氧、氮元素均匀分布,表面含 - OH、-COOH、C=C 等活性基团

量子产率 2.3%,胃肠液中稳定,胃肠道长效滞留

强效止血与广谱抗氧化

剂量依赖性促凝:升高血小板、FIB,缩短 APTT、TT

对 DPPH・/ABTS+・/・OH/O₂−・清除率分别达 107.6%/112.6%/99.8%/84.6%

显著缓解小鼠 UC 症状

改善体重下降、便血、腹泻,降低 DAI、CMDI 评分

恢复结肠长度,减轻黏膜损伤、炎症浸润,恢复杯状细胞

止血效果优于生荷叶,缩短出血时间、减少出血量

抗炎、抗氧化、抑制焦亡

下调 TNF‑α、IL‑6、IL‑1β、IFN‑γ、IL‑17

降低 ROS、MDA、NO、HYP,缓解氧化应激

抑制 NLRP3/Caspase‑1/GSDMD 通路,减少结肠上皮细胞焦亡

恢复免疫平衡

纠正 CD4+/CD8 + 比例失衡

降低 Th17、升高 Treg,重建 Th17/Treg 平衡

修复肠道屏障

上调 Claudin‑1、Occludin、ZO‑1,增强紧密连接

重塑肠道菌群

提升菌群多样性,增加有益菌(拟杆菌、Barnesiella、AKK 菌)

抑制有害菌,富集 SCFA 产生菌

03

研究总结

本研究以药食同源荷叶为原料,450℃密闭煅烧制备含碳点的荷叶炭(LLC),系统证实其对 DSS 诱导的溃疡性结肠炎具有多靶点、多通路治疗效果:

快速止血,改善便血症状

强效抗氧化,打破 “ROS‑炎症” 恶性循环

抑制NLRP3/Caspase‑1/GSDMD焦亡通路,减轻肠道炎症损伤

调节CD4+/CD8 + 与 Th17/Treg免疫平衡

上调紧密连接蛋白,修复肠道黏膜屏障

重塑肠道菌群结构,提升有益菌丰度

荷叶炭碳点兼具高生物安全性与多效治疗活性,为溃疡性结肠炎提供了一种天然、高效、低成本的新策略,也为中药炭药 “炒炭止血” 理论提供了现代纳米科学解释。

创新点

首次证实煅荷叶碳点是治疗 UC 的关键物质基础,将中药炭药与纳米碳点科学关联

一体化解决 UC 五大病理痛点:止血、抗炎、抗氧化、修复屏障、调节菌群

新机制:通过抑制NLRP3 焦亡通路与重塑 Th17/Treg 平衡双重调控肠道免疫

药食同源 + 绿色制备:原料廉价、工艺简单、胃肠稳定、长效滞留、生物安全性高

理论创新:为中医 “炭药止血、收敛止泻” 提供纳米层面科学解释

启示

中药炭药的核心药效物质是纳米碳点,为中药炮制现代化提供新方向

碳点可作为口服胃肠疾病天然纳米药物,兼具多靶点、高安全、长滞留优势

UC 治疗应从 “单一抗炎” 转向止血‑抗炎‑抗氧化‑修复‑调菌群协同策略

药食同源植物经煅烧改性可大幅提升药理活性,为大健康产品开发提供新思路

天然碳点在炎症性肠病、胃肠损伤、出血性疾病中具有广阔转化前景

END

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  1. CONNECT:[ UseTime:0.000551s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000772s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000393s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000339s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000557s ]
  6. SELECT * FROM `set` [ RunTime:0.000253s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000637s ]
  8. SELECT * FROM `article` WHERE `id` = 563285 LIMIT 1 [ RunTime:0.000745s ]
  9. UPDATE `article` SET `lasttime` = 1780476157 WHERE `id` = 563285 [ RunTime:0.032625s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.003653s ]
  11. SELECT * FROM `article` WHERE `id` < 563285 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001671s ]
  12. SELECT * FROM `article` WHERE `id` > 563285 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004144s ]
  13. SELECT * FROM `article` WHERE `id` < 563285 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000853s ]
  14. SELECT * FROM `article` WHERE `id` < 563285 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004087s ]
  15. SELECT * FROM `article` WHERE `id` < 563285 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000874s ]
0.127119s