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薯蓣皂苷对脓毒症大鼠肾损伤的影响及机制
Δ
申 翔 ,徐尚刚,黄洋辉,罗 斌,周裕丰,梁隆斌(成都大学附属医院急诊科,成都 610081)
*
#
中图分类号 R965;R285.5 文献标志码 A 文章编号 1001-0408(2024)11-1334-05
DOI 10.6039/j.issn.1001-0408.2024.11.09
摘 要 目的 探究薯蓣皂苷对脓毒症大鼠肾损伤的影响及可能机制。方法 采用盲肠结扎和穿刺法建立脓毒症大鼠模型。将建
模成功的60只大鼠按照随机数字表法分为模型组(0.5%羧甲基纤维素钠溶液),薯蓣皂苷低、中、高剂量组(30、60、120 mg/kg)和
地塞米松组(阳性对照,10 mg/kg),每组12只;另取12只大鼠作为假手术组(0.5%羧甲基纤维素钠溶液)。造模15 min后,各组大
鼠尾静脉注射给药/0.5%羧甲基纤维素钠溶液。给药24 h后,检测大鼠血清中肌酐(Cr)、尿素氮(BUN)、中性粒细胞明胶酶相关脂
质运载蛋白(NGAL)、肾损伤分子 1(KIM-1)、白细胞介素 6(IL-6)、IL-1β、肿瘤坏死因子 α(TNF-α)水平以及肾组织中丙二醛
(MDA)水平、超氧化物歧化酶(SOD)活性和核因子E2相关因子2(Nrf2)、血红素加氧酶1(HO-1)、NOD样受体蛋白3(NLRP3)表
达量,并观察肾组织病理形态学变化。结果 与模型组比较,薯蓣皂苷低、中、高剂量组大鼠肾组织病理损伤明显改善,血清中Cr、
BUN、NGAL、KIM-1、IL-6、IL-1β、TNF-α水平和肾组织中MDA水平、NLRP3蛋白表达量均显著降低(P<0.05),肾组织中SOD活
性和Nrf2、HO-1蛋白表达量均显著升高(P<0.05),且薯蓣皂苷的作用具有剂量依赖性(P<0.05);薯蓣皂苷高剂量组和地塞米松
组大鼠肾组织病理损伤情况相似,上述指标水平差异均无统计学意义(P>0.05)。结论 薯蓣皂苷可能是通过激活Nrf2/HO-1信号
通路抑制NLRP3炎性小体,实现对炎症因子表达和氧化应激的抑制,从而发挥对脓毒症肾损伤的保护作用。
关键词 薯蓣皂苷;Nrf2/HO-1信号通路;NLRP3炎性小体;脓毒症;肾损伤
Effect and mechanism of dioscin on renal injury in septic rats
SHEN Xiang,XU Shanggang,HUANG Yanghui,LUO Bin,ZHOU Yufeng,LIANG Longbin(Dept. of
Emergency, the Affiliated Hospital of Chengdu University, Chengdu 610081, China)
ABSTRACT OBJECTIVE To investigate the effect of dioscin on renal injury in septic rats and its possible mechanism.
METHODS The septic rat model was induced by using cecal ligation and puncture. Sixty model rats were randomly divided into
model group (0.5% sodium carboxymethyl cellulose solution), dioscin low-dose, medium-dose and high-dose groups (30, 60, 120
mg/kg) and dexamethasone group (positive control, 10 mg/kg), with 12 rats per group; another 12 rats were selected as the sham
operation group (0.5% sodium carboxymethyl cellulose solution). After 15 minutes of modeling, rats in each group were injected
with medicine/0.5% sodium carboxymethyl cellulose solution via the tail vein. Twenty-four hours after administration, the levels of
creatinine (Cr), blood urea nitrogen (BUN), neutrophil gelatinase associated lipocalin (NGAL), kidney injury molecule-1 (KIM-
1), interleukin 6 (IL-6), IL-1β and tumor necrosis factor-α (TNF-α) in serum and malondialdehyde (MDA) in renal tissue,
superoxide dismutase (SOD) activity and the protein expressions of nuclear factor E2-related factor 2 (Nrf2), heme oxygenase-1
(HO-1), NOD-like receptor protein 3 (NLRP3) were detected; renal histomorphology was observed. RESULTS Compared with
model group, pathological injury of renal tissue was improved significantly in dioscin low-dose, medium-dose and high-dose
groups; the levels of Cr, BUN, NGAL, KIM-1, IL-6, IL-1β and TNF-α in serum, MDA level and protein expression of NLRP3
in renal tissue were decreased significantly (P<0.05); SOD activity in renal tissue, protein expressions of Nrf2 and HO-1 were
increased significantly (P<0.05), in a dose-dependent manner (P<0.05). The pathological damage of renal tissue in the dioscin
high-dose group was similar to dexamethasone group, and there was no statistically significant difference in the levels of the above
indicators (P>0.05). CONCLUSIONS Dioscin can activate the Nrf2/HO-1 signaling pathway to inhibit NLRP3 inflammasome,
and realize the inhibition of inflammatory factors and oxidative stress, so as to protect the kidney injury in sepsis.
KEYWORDS dioscin; Nrf2/HO-1 signaling pathway; NOD-like receptor protein 3 inflammasome; sepsis; renal injury
脓毒症是感染引发的全身性炎症综合征,会造成多 症患者的重要死亡原因之一。脓毒症患者肾损伤发生
器官功能衰竭,影响患者生命安全,已成为当今临床重 率高达50%,该类患者预后差、死亡率高,且目前尚无有
[1]
效治疗方法 。
Δ 基金项目 四川省卫生健康委员会科研课题(No.21PJ032)
薯蓣皂苷为薯蓣根提取物,具有抗肿瘤、抗感染、抗
*第一作者 主治医师,硕士研究生。研究方向:脓毒症诊治。
E-mail:shenxiangxiang627@163.com 炎、抗病毒等多种药理作用。据报道,薯蓣皂苷可减轻
[2]
脂多糖诱导的急性肺损伤后的炎症反应和氧化应激 ;
# 通信作者 主任医师。研究方向:急诊重症疾病诊治。E-mail:
381329587@qq.com 可抑制核因子 κB 信号通路,从而改善尿酸诱导的肾小
· 1334 · China Pharmacy 2024 Vol. 35 No. 11 中国药房 2024年第35卷第11期