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花形乳糖装载姜黄素固体脂质纳米粒吸入微粉对 COPD 模型小
鼠肺部炎症的影响及机制
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李 楠 ,李 旭,王 梓,杨 萍,孔令钰(天津市医药科学研究所,天津 300020)
中图分类号 R943 文献标志码 A 文章编号 1001-0408(2023)14-1691-06
DOI 10.6039/j.issn.1001-0408.2023.14.06
摘 要 目的 探讨肺吸入花形乳糖(FL)装载姜黄素(Cur)固体脂质纳米粒(SLN)吸入微粉(Cur-SLN-FL)对慢性阻塞性肺疾病
(COPD)模型小鼠肺部炎症的影响及机制。方法 对Cur-SLN-FL的肺部刺激性进行考察,明确吸入材料的局部安全性。然后随
机选用 10 只小鼠经气管注入生理盐水,其余 50 只小鼠均滴注猪胰蛋白酶溶液(浓度为 33.3 mg/mL、给药剂量为 1.0 mL/kg)复制
COPD模型,小鼠正常喂养28 d后分为假手术组、模型组、布地奈德组(20 mg/kg)和Cur-SLN-FL高、低剂量(100、50 mg/kg)组,每
组10只。按要求给予相应药物,每日1次,连续14 d。末次给药24 h后,采集各组小鼠支气管肺泡灌洗液(BALF)并对其中的白细
胞分类计数;采用苏木素-伊红(HE)染色观察气管和肺组织病理形态;采用Masson染色检测肺组织胶原纤维沉积;采用免疫组织
化学法检测肺组织中核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)、胱天蛋白酶1(caspase-1)、白细胞介素1β(IL-1β)的阳性表
达;采用Western blot法检测肺组织中NLRP3、caspase-1、核因子κB(NF-κB)的蛋白表达。结果 Cur-SLN-FL无明显肺部刺激性。
与假手术组比较,模型组小鼠BALF中白细胞总数、中性粒细胞、嗜酸性粒细胞均显著增加,淋巴细胞数显著降低(P<0.05);气管
见纤毛柱状上皮增生增厚、脱落,腔内可见黏液蓄积,肺组织可见间质炎性细胞浸润;肺组织胶原纤维沉积明显增加,肺组织中
NLRP3、caspase-1、IL-1β的阳性表达明显增强,肺组织中NLRP3、caspase-1、NF-κB蛋白的表达水平均显著升高(P<0.05)。给予
Cur-SLN-FL后,上述各指标均有一定程度改善。结论 Cur-SLN-FL能够改善COPD模型小鼠的肺部炎症反应,其机制可能是通过
调控NLRP3信号通路,抑制caspase-1、NF-κB、IL-1β的表达,进而缓解小鼠肺组织纤维化的进程。
关键词 花形乳糖;姜黄素固体脂质纳米粒;吸入微粉;肺部刺激性;慢性阻塞性肺疾病;NLRP3炎症小体
Effects and mechanism of Curcumin solid lipid nanoparticles loaded with flower-shaped lactose for
inhalation on pulmonary inflammation in COPD model mice
LI Nan,LI Xu,WANG Zi,YANG Ping,KONG Lingyu(Tianjin Institute of Pharmaceutical Science, Tianjin
300020, China)
ABSTRACT OBJECTIVE To investigate the effects and mechanism of curcumin (Cur) solid lipid nanoparticles (SLN) loaded
with flower-shaped lactose (Cur-SLN-FL) for lung inhalation on lung inflammation in chronic obstructive pulmonary disease
(COPD) model mice. METHODS Firstly, the irritation of Cur-SLN-FL to lung tissue was investigated, and the local safety of
inhalation materials was determined. Then, 10 mice were randomly selected and injected with normal saline through the trachea,
and the other 50 mice were all injected with porcine trypsin solution (concentration of 33.3 mg/mL, dosage of 1.0 mL/kg) to
induce the COPD model. After normal feeding for 28 days, the mice were divided into sham operation group, model group,
budesonide group (20 mg/kg), Cur-SLN-FL high-dose and low-dose groups (100, 50 mg/kg), with 10 mice in each group. The
corresponding drugs were given to each group, once a day, for 14 consecutive days. Twenty-four hours after the last
administration, the bronchoalveolar lavage fluid (BALF) of mice in each group was collected and the differential count of white
blood cells was determined. Hematoxylin-eosin (HE) staining was used to observe the histopathology of the trachea and lung tissue
in each group. Masson staining was used to detect collagen deposition in the lung tissue of mice in each group.
Immunohistochemical method was used to detect the positive expressions of nucleotide-binding oligomerization domains-like
receptor protein-3 (NLRP3), caspase-1 and interleukin-1β (IL-1β) in lung tissue of mice. Western blot assay was used to detect
the protein expressions of NLRP3, caspase-1 and nuclear factor of kappa B(NF-κB) in lung tissue. RESULTS Cur-SLN-FL had no
obvious pulmonary irritation. Compared with the sham operation group, the total number of white blood cells, neutrophils and
eosinophils in BALF of the model group increased significantly, while the number of lymphocytes decreased significantly (P<
0.05); ciliated columnar epithelium proliferated, thickened
Δ 基金项目 国家自然科学基金资助项目(No.81903565);天津市
and exfoliated in the trachea, mucus accumulated in the cavity
科技计划项目(No.21JCYBJC01630);天津市卫生健康科技项目(No.
and interstitial inflammatory cells infiltrated in the lung tissue;
TJWJ2021MS046,No.TJWJ2021QN078)
*第一作者 助理研究员,硕士。研究方向:肺部递药系统。 the deposition of collagen fibers in lung tissue increased
E-mail:llittsnows@126.com significantly, the positive expressions of NLRP3, caspase-1
# 通信作者 副研究员。研究方向:纳米递药系统。E-mail: and IL-1β in lung tissue increased significantly, and the
lingyu_kong@163.com expressions of NLRP3, caspase-1 and NF-κB protein in lung
中国药房 2023年第34卷第14期 China Pharmacy 2023 Vol. 34 No. 14 · 1691 ·