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1.广州中医药大学,广州 510006
2.广州中医药大学岭南医学研究中心,广州 510405
3.广州中医药大学第一附属医院,广州 510405
刘伟,E-mail:liuwei@gzucm.edu.cn
收稿:2025-05-31,
修回:2025-09-09,
网络首发:2026-05-06,
纸质出版:2026-05-25
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姜婷,李关英,王鑫,等.电针对胃癌前病变大鼠坏死性凋亡RIPK1/RIPK3/MLKL信号通路的影响[J].针刺研究,2026,51(5):572-582.
JIANG Ting,LI Guan-ying,WANG Xin,et al.Effect of electroacupuncture on necroptosis RIPK1/RIPK3/MLKL signaling pathway in rats with gastric precancerous lesions[J].Acupuncture Research,
姜婷,李关英,王鑫,等.电针对胃癌前病变大鼠坏死性凋亡RIPK1/RIPK3/MLKL信号通路的影响[J].针刺研究,2026,51(5):572-582. DOI: 10.13702/j.1000-0607.20250580.
JIANG Ting,LI Guan-ying,WANG Xin,et al.Effect of electroacupuncture on necroptosis RIPK1/RIPK3/MLKL signaling pathway in rats with gastric precancerous lesions[J].Acupuncture Research, DOI:10.13702/j.1000⁃0607.20250580.
目的
2
观察电针对胃癌前病变(GPL)大鼠胃黏膜损伤及坏死性凋亡受体相互作用蛋白激酶(RIPK)1/RIPK3/混合谱系激酶结构域样蛋白(MLKL)信号通路的影响,探讨其可能的作用机制。
方法
2
将32只雄性SD大鼠随机分为空白组、模型组、电针组、非穴组,每组8只。采用N-甲基-N′-硝基-N-亚硝基胍溶液自由饮用联合饥饱失常法构建GPL大鼠模型,持续20周。从造模后第13周开始,电针组给予电针双侧“足三里”“中脘”,非穴组选取穴位旁开5 mm非经非穴处进行电针干预,两组电针参数一致,均每次20 min,每日治疗1次,每周5次,持续8周。观察大鼠的一般情况与体质量变化;采用苏木精-伊红(HE)染色法、阿利新蓝-过碘酸雪夫(AB-PAS)染色法观察大鼠胃组织病理变化;ELISA法检测血清肿瘤坏死因子α(TNF-α)、白细胞介素1β(IL-1β)、转化生长因子β1(TGF-β1)含量;免疫组织化学法检测胃组织尾型同源盒转录因子(CDX)2蛋白阳性表达;实时荧光定量PCR法检测胃组织Ki67、α-甲基酰基辅酶A消旋酶(AMACR),性别决定区Y框蛋白2(SOX2),CDX1,RIPK1/RIPK3/MLKL信号通路相关蛋白RIPK1、RIPK3、MLKL,以及凋亡通路相关蛋白半胱氨酸蛋白酶(Caspase)-8、Caspase-3、Caspase-7 mRNA表达水平;Western blot法检测胃组织CDX2、AMACR、p-RIPK1、RIPK1、p-RIPK3、RIPK3、p-MLKL、MLKL、Caspase-8、Caspase-3蛋白表达水平。
结果
2
与空白组相比,模型组大鼠体质量增长率及平均日进食量降低(
P
<
0.01);胃黏膜腺腔开口变深,伴腺体萎缩及肠上皮化生;血清中TNF-α、IL-1β、TGF-β1含量升高(
P
<
0.01);胃黏膜组织Ki67、AMACR、CDX1、RIPK1、RIPK3、MLKL mRNA表达水平升高(
P
<
0.05,
P
<
0.01),CDX2、AMACR蛋白表达水平及p-RIPK1/RIPK1、p-RIPK3/RIPK3、p-MLKL/MLKL比值升高(
P
<
0.01,
P
<
0.05),SOX2、Caspase-8、Caspase-3 mRNA及Caspase-8、Caspase-3蛋白表达水平下降(
P
<
0.01,
P
<
0.05)。与模型组相比,电针组大鼠精神状态改善,体质量增长率、平均日进食量升高(
P
<
0.01,
P
<
0.05);胃黏膜萎缩、肠上皮化生程度减轻;血清中TNF-α、IL-1β、TGF-β1含量下降(
P
<
0.05,
P
<
0.01);胃黏膜组织Ki67、AMACR、CDX1、RIPK1、RIPK3、MLKL mRNA表达水平降低(
P
<
0.05,
P
<
0.01),CDX2、AMACR蛋白表达水平及p-RIPK1/RIPK1、p-RIPK3/RIPK3、p-MLKL/MLKL比值降低(
P
<
0.05),SOX2、Caspase-8、Caspase-3 mRNA及Caspase-8、Caspase-3蛋白表达水平升高(
P
<
0.01,
P
<
0.05)。与电针组相比,非穴组大鼠体质量增长率及平
均日进食量降低(
P
<
0.05,
P
<
0.01),胃黏膜组织腺体排列仍呈紊乱状态,病理组织学未改善,肠上皮化生病变未缓解;血清中TNF-α、IL-1β含量升高(
P
<
0.05);胃黏膜组织Ki67、CDX1、MLKL mRNA表达水平升高(
P
<
0.01,
P
<
0.05),AMACR蛋白表达水平及p-RIPK1/RIPK1、p-RIPK3/RIPK3、p-MLKL/MLKL比值升高(
P
<
0.05,
P
<
0.01),Caspase-3 mRNA及蛋白表达水平下降(
P
<
0.01)。
结论
2
电针“足三里”“中脘”可改善GPL大鼠胃黏膜损伤,其作用机制可能与减轻胃黏膜炎性反应,抑制坏死性凋亡RIPK1/RIPK3/MLKL信号通路激活有关。
Objective
2
To observe the effect of electroacupuncture (EA) on gastric mucosal injury and necroptosis receptor-interacting protein kinase (RIPK)1/RIPK3/mixed lineage kinase domain-like (MLKL) signaling pathway in rats with precancerous lesions of gastric cancer, so as to explore its possible mechanism underlying improvement of gastric precancerous lesions (GPL).
Methods
2
A total of 32 male SD rats were randomly divided into blank control, model, EA, and sham EA groups, with 8 rats in each group. The GPL model was established by free drinking of N-methyl-N’-nitro-N-nitrosoguanidine solution combined with intermittent fasting for 20 weeks. Starting from the 13
th
week of modeling, EA (2 Hz/15 Hz, 0.3—0.5 mA) was applied to bilateral “Zusanli” (ST36) and “Zhongwan” (CV12) for rats of the EA group, and applied to non-acupoints (5 mm away to ST36 and CV12) for rats of the sham EA group. The treatment was conducted for 20 min, once a day, 5 times a week for 8 weeks. During the experiment, the general conditions and body weight changes were recorded. Histopathological changes of the gastric tissues were observed by hematoxylin-eosin (H.E.) staining and alcian blue-periodic acid schiff (AB-PAS) staining, separately. The ELISA was used to detect the contents of tumor necrosis factor alpha (TNF-α), interleukin 1 beta (IL-1β) and transforming growth factor beta 1 (TGF-β1) in the serum. Immuno
histochemistry (IHC) was used to detect the levels of caudal type homeobox transcription factor (CDX) 2 in the gastric tissue. The mRNA expression levels of Ki67, alpha-methylacyl-CoA racemase (AMACR), sex determining region Y box protein 2 (SOX2), CDX1, RIPK1, RIPK3, MLKL, Caspase-8, Caspase-3 and Caspase-7 in the gastric tissues were detected by using real-time PCR. The protein expression levels of CDX2, AMACR, phospho-RIPK1 (p-RIPK1), RIPK1, phospho-RIPK3 (p-RIPK3), RIPK3, phospho-MLKL (p-MLKL), MLKL, Caspase-8, and Caspase-3 in the gastric tissues were detected by using Western blot.
Results
2
In contrast to the blank control group, the model group had a significant decrease in the body weight gain rate, average daily food intake, expression levels of SOX2 mRNA, and Caspase-3 and Caspase-8 mRNAs and proteins in the gastric tissues (
P
<
0.01,
P
<
0.05), and a considerable increase in the contents of serum TNF-α, IL-1β, TGF-β1, and positive expression of CDX2, expression levels of Ki67, AMACR, CDX1, RIPK1, RIPK3 and MLKL mRNAs, and p-RIPK1/RIPK1, p-RIPK3/RIPK3 and p-MLKL/MLKL ratios in the gastric tissues (
P
<
0.01,
P
<
0.05). The gastric mucosal glands were deeper in the opening, and had an apparent atrophy with intestinal metaplasia of the gastric epithelium. Compared with the model group, the rats in the EA group (not the sham EA group) showed improved mental state, and increased body weight gain rate and average daily food intake (
P
<
0.01,
P
<
0.05). The pathological conditions of gastric mucosal atrophy and intestinal metaplasia were improved. In addition, modeling induced increase of the contents of serum TNF-α, IL-1β, TGF-β1, and positive expression of CDX2, expression levels of Ki67, AMACR, CDX1, RIPK1, RIPK3 and MLKL mRNAs, and p-RIPK1/RIPK1, p-RIPK3/RIPK3 and p-MLKL/MLKL ratios, and decrease of the expression levels of SOX2 mRNA, and Caspase-3 and Caspase-8 mRNAs an
d proteins were all reversed by EA (
P
<
0.05,
P
<
0.01), not by sham EA. H.E. staining showed that the glandular arrangement in the gastric mucosa of the rats in the sham EA group remained disordered, and the pathological histological recovery was poor.
Conclusion
2
EA can improve the degree of gastric mucosal lesions in GPL rats, which may be related to its functions in reducing the inflammatory response of the gastric mucosa and inhibiting the necroptosis RIPK1/RIPK3/MLKL signaling pathway of the gastric mucosa.
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