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基于 TLR4 介导的细胞焦亡通路研究红景天苷预防心肌纤维化
的作用机制
Δ
1, 2 #
温方军 1, 2* ,高 磊 ,胡益敏 ,石开虎 (1.南京中医药大学附属中西医结合医院心胸外科,南京 210028;
3
2, 4
2.江苏省中医药研究院,南京 210028;3.南京中医药大学中医学院/中西医结合学院,南京 210046;4.南京中
医药大学附属中西医结合医院普外科,南京 210028)
中图分类号 R285;R542.2+3 文献标志码 A 文章编号 1001-0408(2023)09-1053-07
DOI 10.6039/j.issn.1001-0408.2023.09.06
摘 要 目的 探讨红景天苷对小鼠心肌纤维化和焦亡的影响及潜在的作用机制。方法 将小鼠随机分为对照组、模型组和红景
天苷低、中、高剂量组,每组各10只。除对照组外,其余各组小鼠皮下注射异丙肾上腺素5 mg/(kg·d)造模。自造模之日起,红景
天苷低、中、高剂量组小鼠每日灌胃红景天苷10、30、50 mg/kg,对照组和模型组小鼠每日灌胃生理盐水10 mL/kg,连续14 d。末次
给药后处死小鼠,以苏木素-伊红染色法观察小鼠心肌组织病理变化并计算心肌细胞横径,Masson、Sirius Red染色法观察小鼠心
肌组织纤维化程度并计算心肌胶原容积分数(CVF),实时荧光定量PCR法检测小鼠心肌组织中Ⅰ型胶原蛋白(Col Ⅰ)、α-平滑肌
肌动蛋白(α-SMA)、Toll 样受体 4(TLR4)、NOD 样受体蛋白 3(NLRP3)、半胱氨酸蛋白酶 1(caspase-1)、消皮素 D(GSDMD)的
mRNA 表达水平,Western blot 法和免疫组织化学法检测小鼠心肌组织中 Col Ⅰ、α-SMA、TLR4、NLRP3、caspase-1、GSDMD 的总
蛋白表达水平及蛋白阳性细胞积分。结果 与对照组比较,模型组小鼠心肌细胞体积增大,心肌纤维排列紊乱,细胞基质明显增
加,心肌组织中CVF显著升高,Col Ⅰ、α-SMA、TLR4、NLRP3、caspase-1、GSDMD的mRNA、总蛋白表达水平及蛋白阳性细胞积分
均显著升高(P<0.01)。与模型组比较,红景天苷中、高剂量组小鼠心肌细胞形态较清晰,心肌纤维化程度较低,心肌组织中以上
指标水平均不同程度逆转,尤其是红景天苷高剂量组逆转程度最显著(P<0.05或P<0.01)。此外,红景天苷低剂量组部分纤维化
和焦亡相关指标也在一定程度上逆转。结论 红景天苷对心肌纤维化的发生、发展有明显的预防作用,其机制可能是通过抑制
TLR4介导的心肌细胞焦亡通路激活。
关键词 红景天苷;心肌纤维化;焦亡;Toll样受体4;NOD样受体蛋白3
Mechanism of salidroside preventing myocardial fibrosis based on TLR4-mediated pyroptosis pathway
WEN Fangjun ,GAO Lei ,HU Yimin ,SHI Kaihu (1. Dept. of Cardio-Thoracic Surgery, Integrated
1, 2
3
1, 2
2, 4
Traditional Chinese and Western Medicine Hospital Affiliated to Nanjing University of Chinese Medicine,
Nanjing 210028, China;2. Jiangsu Province Academy of Chinese Medicine, Nanjing 210028, China;3. College
of Traditional Chinese Medicine/College of Integrated Traditional Chinese and Western Medicine, Nanjing
University of Chinese Medicine, Nanjing 210046, China;4. Dept. of General Surgery, Integrated Traditional
Chinese and Western Medicine Hospital Affiliated to Nanjing University of Chinese Medicine, Nanjing 210028,
China)
ABSTRACT OBJECTIVE To investigate the effects of salidroside (Sal) on myocardial fibrosis and pyroptosis and its potential
mechanism. METHODS The mice were randomly divided into control group, model group and Sal low-dose, medium-dose and
high-dose groups, with 10 mice in each group. Except for the control group, the mice in other groups were injected subcutaneously
with isoproterenol 5 mg/(kg·d)to prepare the myocardial fibrosis model. Since modeling, mice in the Sal low-dose, medium-dose
and high-dose groups were given 10, 30 and 50 mg/kg of Sal by intragastric administration every day; control group and model
group were given 10 mL/kg of normal saline by intragastric administration every day, for 14 consecutive days. After the last
medication, the mice were sacrificed; hematoxylin-eosin staining was used to observe pathological change of myocardial tissue and
calculate the diameter of myocardial cell; Masson and Sirius Red staining were used to observe the degree of myocardial fibrosis in
mice and calculate the collagen volume fraction (CVF);
Δ 基金项目 江苏省基础研究计划(自然科学基金)资助项目(No.
quantitative real-time PCR was performed to detect the mRNA
BK20191503);江 苏 省 中 医 药 研 究 院 青 年 科 学 研 究 项 目(No.
expressions of collagen type Ⅰ (Col Ⅰ), α-smooth muscle
QNKXYJ202109)
*第一作者 硕士研究生。研究方向:房颤心肌纤维化。E-mail: actin (α-SMA), Toll-like receptor 4 (TLR4), NOD-like
1392201546@qq.com receptor pyrin domain containing 3 (NLRP3), caspase-1 and
# 通信作者 教授,主任医师,博士生导师,博士。研究方向:房颤 gasdermin D (GSDMD) in myocardial tissues. The total
心肌纤维化。E-mail:jsszxyskh@163.com protein expressions of Col Ⅰ , α -SMA, TLR4, NLRP3,
中国药房 2023年第34卷第9期 China Pharmacy 2023 Vol. 34 No. 9 · 1053 ·