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1,8-桉叶油素对2型糖尿病胰岛β细胞铁死亡的干预作用及机制
Δ
杨 红 1, 2* ,任鹏艳 ,陈永鑫 ,姚喻霆 ,甘诗泉 ,刘 佳 ,陈婷婷 ,张 宝 ,沈祥春 2, 3 # ,李 悦(1.贵阳
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市妇幼保健院/贵阳市儿童医院药学部,贵阳 550003;2.贵州医科大学天然药物资源优效利用重点实验室,
贵阳 561113;3.贵州医科大学药学院,贵阳 561113)
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2024)03-0290-06
DOI 10.6039/j.issn.1001-0408.2024.03.05
摘 要 目的 研究1,8-桉叶油素对2型糖尿病胰岛β细胞铁死亡的干预作用及机制。方法 使用高糖作用于小鼠胰岛β细胞以
建立细胞铁死亡模型,考察低、高剂量1,8-桉叶油素(0.25、0.5 μmol/L)对胰岛β细胞中Fe 水平的影响,并考察1,8-桉叶油素(0.5
2+
μmol/L)联合铁死亡诱导剂 Erastin(20 μmol/L)和抑制剂 Ferrostatin-1(20 μmol/L)后对胰岛 β 细胞中谷胱甘肽过氧化物酶 4
(GPX4)、环氧合酶2(COX2)蛋白表达的影响。采用高脂高糖饲料饲养联合腹腔注射链脲佐菌素构建2型糖尿病小鼠模型,考察
低、高剂量1,8-桉叶油素(50、200 mg/kg)对模型小鼠胰腺组织病理形态、铁含量以及GPX4、COX2蛋白表达的影响。结果 细胞
实验结果显示,与模型组比较,经1,8-桉叶油素干预后,胰岛β细胞中Fe 水平显著降低(P<0.05);GPX4蛋白表达水平显著升高
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(P<0.05),COX2蛋白表达水平显著降低(P<0.05),且联合Ferrostatin-1后上述两种蛋白表达趋势相同,而联合Erastin后差异无
统计学意义。动物实验结果显示,与模型组比较,经1,8-桉叶油素干预后,小鼠胰岛结构恢复完整,形态有所改善;胰腺组织中铁
含量和COX2蛋白表达水平均显著降低(P<0.05),GPX4蛋白表达水平显著升高(P<0.05)。结论 1,8-桉叶油素对2型糖尿病胰
岛β细胞损伤具有明显的改善作用,其作用机制可能与降低细胞内铁沉积以及调控铁死亡相关蛋白有关。
关键词 1,8-桉叶油素;2型糖尿病;胰岛β细胞;铁死亡
Interventional effect and mechanism of 1,8-cineole on pancreatic β cell ferroptosis induced by type 2
diabetes
YANG Hong ,REN Pengyan ,CHEN Yongxin ,YAO Yuting ,GAN Shiquan ,LIU Jia ,CHEN Tingting ,
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ZHANG Bao ,SHEN Xiangchun ,LI Yue(1. Dept. of Pharmacy, Guiyang Maternal and Child Health Care
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Hospital/Guiyang Children’s Hospital, Guiyang 550003, China;2. Key Laboratory of Optimal Utilization of
Natural Medicine Resources, Guizhou Medical University, Guiyang 561113, China;3. College of Pharmacy,
Guizhou Medical University, Guiyang 561113, China)
ABSTRACT OBJECTIVE To study the interventional effect and mechanism of 1,8-cineole on pancreatic β cell ferroptosis
induced by type 2 diabetes. METHODS In vitro ferroptosis model was established in pancreatic β cells of mice by using high
glucose. The effects of low-dose and high-dose 1,8-cineole (0.25, 0.5 μmol/L) on the level of Fe in pancreatic β cells were
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investigated. The effects of 1,8-cineole (0.5 μmol/L) combined with ferroptosis inducer Erastin (20 μmol/L) and ferroptosis
inhibitor Ferrostatin-1 (20 μmol/L) on the protein expressions of glutathione peroxidase-4 (GPX4) and cyclooxygenase-2 (COX2)
were also detected. The type 2 diabetes model mice were established by feeding high-sugar and high-fat diet combined with
intraperitoneal injection of streptozotocin. The effects of low-dose and high-dose 1,8-cineole (50, 200 mg/kg) on the pathological
morphology of pancreatic tissue, the content of iron as well as the protein expressions of GPX4 and COX2 were investigated.
RESULTS The results of the cell experiment showed that compared with the model group, pretreatment with 1,8-cineole
significantly reduced intracellular Fe levels and upregulated GPX4 protein expression, while downregulated COX2 protein
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expression in pancreatic β cells (P<0.05). After combining
Δ 基金项目 国家自然科学基金项目(No.82060772);贵州省科技
with Ferrostatin-1, the expression trends of the above two
计划项目(No.黔科合基础-ZK〔2022〕一般005);贵州省科技创新基地
建设项目(No.黔科合中引地〔2023〕003);贵阳市卫生健康局科学技术 proteins were the same, while there was no statistically
计划项目(No.〔2022〕筑卫健科技合同字第005号) significant difference after combining with Erastin. The results
*第一作者 主管药师。研究方向:中医药防治糖尿病。E-mail:
of animal experiments showed that compared with the model
1329070275@qq.com
group, after intervention with 1,8-cineole, the structure of the
# 通信作者 教授,博士生导师,博士。研究方向:心血管药物药理
活性、中药与民族药。E-mail:shengxiangchun@126.com pancreatic islets in mice recovered intact and their morphology
· 290 · China Pharmacy 2024 Vol. 35 No. 3 中国药房 2024年第35卷第3期