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类叶升麻苷调控 Rnd3/NF-κB 通路对缺氧/复氧诱导心肌细胞损
伤的影响 Δ
杨 洋 ,李天发 ,王 军,黄 珊,凌学斌(海南医学院第一附属医院心血管内科,海口 570102)
*
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中图分类号 R965.1 文献标志码 A 文章编号 1001-0408(2022)05-0542-06
DOI 10.6039/j.issn.1001-0408.2022.05.06
摘 要 目的 探讨类叶升麻苷调控Rho家族GTP酶3(Rnd3)/核因子κB(NF-κB)通路对缺氧/复氧(H/R)诱导心肌细胞损伤的影
响。方法 本实验将H9c2心肌细胞分为对照组(不给药、不造模)、H/R组(仅造模)、H/R+AS-L组、H/R+AS-M组、H/R+AS-H组(以
上 3 组先分别给予 10、30、90 μmol/L 类叶升麻苷,再造模)、H/R+pcDNA 组[先转染 pcDNA(空载体),再造模]、H/R+pcDNA-Rnd3
组[先转染pcDNA-Rnd3(Rnd3过表达载体)使Rnd3过表达,再造模]、H/R+AS-H+si-NC组[先转染si-NC(阴性对照),然后给予90
μmol/L类叶升麻苷,再造模]、H/R+AS-H+si-Rnd3组[先转染si-Rnd3(Rnd3小分子干扰RNA)抑制Rnd3过表达,然后给予90 μmol/L
类叶升麻苷,再造模]。各组经相应处理后,检测细胞凋亡率和细胞中乳酸脱氢酶(LDH)释放量、丙二醛(MDA)水平、超氧化物歧
化酶(SOD)活性、肿瘤坏死因子α(TNF-α)水平、白细胞介素 1β(IL-1β)水平、IL-6 水平、Rnd3 和 NF-κB 亚基 p65(NF-κB p65)
mRNA及蛋白的表达、活化胱天蛋白酶3(Cleaved Caspase-3)和Cleaved Caspase-9蛋白表达的变化。结果 给予不同浓度类叶升麻
苷均可降低H/R诱导H9c2心肌细胞凋亡率、Cleaved Caspase-3和Cleaved Caspase-9蛋白表达水平、NF-κB p65 mRNA及蛋白表达
水平、LDH释放量和MDA、TNF-α、IL-1β、IL-6水平,升高SOD活性和Rnd3 mRNA及蛋白表达水平(P<0.05),且呈剂量依赖性。
Rnd3过表达可使H/R诱导H9c2心肌细胞凋亡率,NF-κB p65、Cleaved Caspase-3、Cleaved Caspase-9蛋白表达水平,LDH释放量和
MDA、TNF-α、IL-1β、IL-6 水平降低,使 Rnd3 蛋白表达水平和 SOD 活性升高(P<0.05);而抑制 Rnd3 过表达,可减弱类叶升麻
苷对 H/R诱导H9c2心肌细胞的凋亡、氧化应激及炎症反应的抑制作用(P<0.05)。结论 类叶升麻苷可通过促进Rnd3表达、抑制
NF-κB p65表达来调控Rnd3/NF-κB通路,进而抑制心肌细胞凋亡、氧化应激及炎症反应,从而减轻H/R诱导的心肌细胞损伤。
关键词 类叶升麻苷;Rnd3/NF-κB通路;缺氧/复氧;H9c2心肌细胞;细胞凋亡;氧化应激;炎症反应
Effects of acteoside on hypoxia/reoxygenation-induced cardiomyocyte damage by regulating the Rnd3/NF-κB
pathway
YANG Yang,LI Tianfa,WANG Jun,HUANG Shan,LING Xuebin(Dept. of Cardiovascular Medicine,the First
Affiliated Hospital of Hainan Medical College,Haikou 570102,China)
ABSTRACT OBJECTIVE To explore the effects of acteoside on hypoxia/reoxygenation(H/R)-induced cardiomyocyte damage
by regulating Rho family GTPase 3(Rnd3)/nuclear factor κB(NF-κB)pathway. METHODS The H9c2 cardiomyocyte were
divided into control group(no administration,no modeling),H/R group(only modeling),H/R+AS-L group,H/R+AS-M group,
H/R+AS-H group(10,30,90 μmol/L acteoside for above 3 groups firstly,and then modeling),H/R+pcDNA group [transfecting
pcDNA (empty vector) firstly, and then modeling], H/R + pcDNA-Rnd3 group [overexpression of Rnd3 by transfecting
pcDNA-Rnd3(Rnd3 overexpression vector)firstly,and then modeling],H/R+AS-H+si-NC group [transfecting si-NC(negative
control)firstly,and then giving 90 μmol/L acteoside and modeling],H/R+AS-H+si-Rnd3 group [inhibiting overexpression of Rnd3
by transfecting si-Rnd3 (Rnd3 small interfering RNA) firstly,and then giving 90 μ mol/L acteoside and modeling]. After
corresponding treatment,the apoptotic rate,release of lactate dehydrogenase(LDH),malondialdehyde(MDA)level,the activity
of superoxide dismutase(SOD),the level of tumor necrosis factor α(TNF-α),interleukin 1β(IL-1β)and interleukin-6(IL-6),
mRNA and protein expression of Rnd3 and NF-κB subunit p65(NF-κB p65),the expression of aspartate proteolytic enzyme 3
(Cleaved Caspase-3)protein and Cleaved Caspase-9 protein were detected. RESULTS Different concentrations of acteoside could
reduce the apoptotic rate of H/R-induced H9c2 cardiomyocyte,the protein expressions of Cleaved Caspase-3 and Cleaved
Caspase-9,mRNA and protein expressions of NF-κB p65,the levels of LDH release and MDA,TNF-α,IL-1β and IL-6,while
increase the activity of SOD and mRNA and protein expressions of Rnd3(P<0.05),in a dose-dependent manner. Overexpression
of Rnd3 could decrease the apoptotic rate of H9c2 cardiomyocyte,protein expressions of NF-κ B p65,Cleaved Caspase-3 and
Cleaved Caspase-9, the levels of LDH release, MDA,
Δ 基金项目:国家自然科学基金资助项目(No.81860075)
TNF-α,IL-1β and IL-6,while increase the protein expression
*主治医师,硕士。研究方向:心血管内科起搏电生理、心肌梗死
药物治疗。电话:0898-66528127。E-mail:yytm85@126.com of Rnd3 and the activity of SOD (P<0.05). The inhibition
# 通信作者:主任医师,博士。研究方向:心血管内科冠状动脉介 overexpression of Rnd3 could weaken the inhibitory effects of
入治疗。电话:0898-66528127。E-mail:2223084306@qq.com acteoside on H/R-induced apoptosis of H9c2 cardiomyocyte,
·542 · China Pharmacy 2022 Vol. 33 No. 5 中国药房 2022年第33卷第5期