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PNU282987 对小鼠心脏重塑的改善作用及对 JAK2/STAT3 信号
通路的影响 Δ
2 #
方欢乐 ,李晓明 ,倪敏黾 ,赵玉文 ,杨永华 (1.西安培华学院医学院,西安 710125;2.西安交通大学第一附
1
1*
1
1
属医院儿科,西安 710061)
中图分类号 R542.2;R965 文献标志码 A 文章编号 1001-0408(2021)10-1246-06
DOI 10.6039/j.issn.1001-0408.2021.10.15
摘 要 目的:研究α7烟碱型乙酰胆碱受体激动剂PNU282987对小鼠心脏重塑的改善作用及对Janus激酶2/信号转导及转录激
活因子3(JAK2/STAT3)信号通路的影响。方法:将雄性昆明种小鼠随机分为正常对照组、模型组、普萘洛尔组(阳性对照,灌胃40
mg/kg)和PNU282987低、中、高剂量组(腹腔注射0.5、1.0、3.0 mg/kg),每组10只。除正常对照组外,其余各组小鼠皮下注射异丙
肾上腺素(ISO,30 mg/kg)7天以复制心脏重塑模型;各给药组小鼠均于ISO注射30 min后给予相应药液,每天1次,连续7天。末
次给药 12 h 后,检测各组小鼠左室射血分数(EF)和左室短轴缩短率(FS),计算全心质量指数(HMI),观察其心肌组织形态学特
征,测定血清中乳酸脱氢酶(LDH)、肌酸激酶(CK)、肿瘤坏死因子α(TNF-α)、白细胞介素 6(IL-6)含量和细胞间黏附分子 1
(ICAM-1)、血管细胞黏附分子 1(VCAM-1)蛋白表达水平,检测心肌组织中磷酸化 JAK2(p-JAK2)/JAK2、磷酸化 STAT3
(p-STAT3)/STAT3 比值。结果:与正常对照组比较,模型组小鼠 EF、FS 均显著降低,HMI,LDH、CK、TNF-α、IL-6 含量,ICAM-1、
VCAM-1 蛋白表达水平和 p-JAK2/JAK2、p-STAT3/STAT3 比值均显著升高(P<0.05 或 P<0.01),心肌间质蓝色胶原沉积明显,纤
维化程度较重。与模型组比较,PNU282987 中、高剂量组和普萘洛尔组小鼠 EF、FS 均显著升高,HMI(PNU282987 中剂量组除
外),LDH(PNU282987 中剂量组除外)、CK、TNF-α、IL-6 含量,ICAM-1、VCAM-1 蛋白表达水平和 p-JAK2/JAK2、p-STAT3/STAT3
比值均显著降低(P<0.05或P<0.01),心肌间质蓝色胶原沉积明显减少,心肌纤维化程度明显降低;而PNU282987低剂量组小鼠
上述指标变比较差异无明显变化(P>0.05)。结论:PNU282987可改善小鼠的心脏重塑,其机制可能与抑制JAK2/STAT3信号通
路有关。
关键词 PNU282987;异丙肾上腺素;心脏重塑;抗炎作用;Janus激酶2/信号转导及转录激活因子3信号通路;小鼠
Effects of PNU282987 on Improving Cardiac Remodeling and JAK2/STAT3 Signaling Pathway
FANG Huanle ,LI Xiaoming ,NI Minmin ,ZHAO Yuwen ,YANG Yonghua(1. Medical College,Xi’an Peihua
1
1
1
2
1
University,Xi’an 710125,China;2. Dept. of Pediatrics,the First Affiliated Hospital of Xi’an Jiaotong
University,Xi’an 710061,China)
ABSTRACT OBJECTIVE:To study the effects of α 7 nicotinic acetylcholine receptor agonists (PNU282987) on improving
cardiac remodeling of mice and Janus kinase 2/signal transducer and activator of transcription 3(JAK2/STAT3)signaling pathway.
METHODS:Male Kunming mice were randomly divided into normal control group,model group,propranolol group(positive
control,i.g. 40 mg/kg)and PNU282987 low-dose,medium-close and high-dose groups(intraperitoneal injection of 0.5,1.0,3.0
mg/kg),with 10 mice in each group. Except for the normal control group,mice in the other groups were given isoproterenol
(ISO,30 mg/kg) subcutaneously for 7 days to induce the cardiac remodeling model. After 30 minutes of ISO injection,
administration groups were given relevant liquid,once a day,for 7 consecutive days. Twelve hours after last administration,the
left ventricular ejection fraction(EF)and left ventricular short axis shortening rate(FS)of mice in each group were measured,and
the whole heart mass index(HMI)was calculated;the pathological changes of myocardium were observed. The serum contents of
lactate dehydrogenase (LDH),creatine kinase (CK),tumor necrosis factor α (TNF-α),interleukin 6 (IL-6),the protein
expression of intercellular adhesion molecule 1(ICAM-1)and adhesion molecule 1(VCAM-1)were also determined. The ratios of
p-JAK2/JAK2,p-STAT3/STAT3 in myocardial tissue were detected. RESULTS:Compared with normal control group,EF and FS
of model group were significantly reduced,HMI,the contents of LDH,CK,TNF-α and IL-6,the protein expression of ICAM-1
and VCAM-1,the ratio of p-JAK2/JAK2 and p-STAT3/STAT3
Δ 基金项目:陕西省重点研发计划项目(No.2021SF-362);西安培
were increased significantly (P<0.05 or P<0.01); blue
华学院校级重点课题(No.PHKT19010);西安培华学院大学生创新创
collagen deposition in the interstitium of myocardium was
业项目(No.PHDC2020045)
obvious,and the degree of fibrosis was severe. Compared
* 副 教 授 ,硕 士 。 研 究 方 向 :心 血 管 药 理 学 。 电 话 :029-
85680271。E-mail:43599079@qq.com with model group, the EF and FS of the mice in the
# 通信作者:副主任医师,博士。研究方向:心血管药理学。电 PNU282987 medium-dose and high-dose groups were
话:029-85323820。E-mail:yyhflower@126.com increased significantly, HMI (except for PNU282987
·1246 · China Pharmacy 2021 Vol. 32 No. 10 中国药房 2021年第32卷第10期