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南京农大 张源淑,陈雪清等:猪流行性腹泻病毒感染诱导的Warburg效应与血管紧张素转换酶2的表达呈负相关关系

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南京农大 张源淑,陈雪清等:猪流行性腹泻病毒感染诱导的Warburg效应与血管紧张素转换酶2的表达呈负相关关系

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《畜牧兽医学报》2026年第57卷第3期刊登了南京农业大学 农业部动物生理生化重点开放实验室陈雪清, 马畅, 王公民, 王换换, 张源淑的文章——“猪流行性腹泻病毒感染诱导的Warburg效应与血管紧张素转换酶2的表达呈负相关关系”,该文由国家自然科学基金(31972640)资助。该研究的创新点:首次揭示PEDV感染通过下调ACE2表达诱导仔猪肠道Warburg效应(糖酵解激活、TCA循环抑制),发现ACE2-Ang1-7-MasR通路参与调控病毒诱导的葡萄糖代谢重塑,为冠状病毒感染代谢干预提供新靶点。

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猪流行性腹泻病毒感染诱导的Warburg效应与血管紧张素转换酶2的表达呈负相关关系

导读

 研究背景与目的

猪流行性腹泻病毒(PEDV)是肠道致病性冠状病毒,感染导致仔猪严重腹泻、脱水甚至死亡。病毒感染常通过重塑宿主代谢(如Warburg效应)促进自身复制,但PEDV与宿主代谢的相互作用尚未明确。血管紧张素转换酶2(ACE2)是PEDV受体,参与糖代谢调控,且在抗PEDV感染中发挥作用。本研究旨在探究PEDV感染对仔猪肠道葡萄糖代谢的调节作用及ACE2在其中的机制,明确ACE2、PEDV感染与肠道葡萄糖代谢的相互关系。

1 材料与方法

1.1 试验材料

1.1.1 主要试剂和仪器   ACE2、Tubulin、PEDV-N、GLUT-2、SGLT-1、MasR抗体;Ang II、Ang1-7 ELISA试剂盒;RT-qPCR试剂盒;M-900生化分析仪、多功能酶标仪、RT-qPCR仪、化学发光成像系统等。

1.1.2 试验动物及样品采集   PEDV阳性腹泻仔猪3头(试验组)和日龄相近健康仔猪3头(对照组),采集血液及十二指肠、空肠、回肠组织样品。

1.2 方法

1.2.1 血液葡萄糖及乳酸含量检测   取血液500μL,采用M-900生化分析仪(固定化酶膜生物传感器)检测葡萄糖(mmol·L⁻¹)和乳酸(mmol·L⁻¹)浓度。

1.2.2 PEDV M基因及N蛋白鉴定   Trizol法提取组织总RNA,一步法RT-PCR扩增M基因,琼脂糖凝胶电泳鉴定;SYBR Green染料RT-qPCR检测N基因;Western blot检测N蛋白表达(一抗1:500)。

1.2.3 GLUT-2及SGLT-1蛋白检测   Western blot检测,GLUT-2一抗1:1000,SGLT-1一抗1:800。

1.2.4 糖代谢通路相关酶基因表达检测   RT-qPCR检测糖酵解关键酶(HK2、PKM、PFK、LDHA)和TCA循环关键酶(CS、IDH、OGDH)基因转录水平。

1.2.5 RAS相关组分检测   ELISA法检测Ang1-7和Ang II含量;Western blot检测ACE2(一抗1:1500)和MasR(一抗1:15 000)蛋白表达。

1.2.6 数据统计与分析   SPSS 26单因素方差分析和独立样本t检验,GraphPad Prism 10.0绘图,Spearman法相关性分析。

2 结果

2.1 PEDV的PCR鉴定及在仔猪各肠段组织中的表达分布

腹泻仔猪空肠组织M基因RT-PCR出现552bp阳性条带;PEDV-N蛋白在十二指肠、空肠、回肠均有表达,空肠表达最高(P<0.01);N基因mRNA水平空肠显著高于其他肠段(图1)。

2.2 PEDV感染对仔猪血液葡萄糖和乳酸含量的影响

PEDV组血液葡萄糖含量(87.67 mg·dL⁻¹)显著高于对照组(71.33 mg·dL⁻¹,P<0.05),乳酸含量(8.91 mmol·L⁻¹)极显著高于对照组(4.68 mmol·L⁻¹,P<0.01),提示糖酵解途径激活(表3)。

2.3 PEDV感染对仔猪小肠组织中葡萄糖转运载体表达的影响

PEDV组十二指肠和空肠SGLT-1、GLUT-2蛋白表达极显著上调(P<0.01),回肠SGLT-1显著上调(P<0.05),GLUT-2极显著上调(P<0.01),表明葡萄糖摄取增加(图2)。

2.4 PEDV感染对仔猪小肠组织中糖酵解相关酶基因转录的影响

PEDV组十二指肠、空肠、回肠HK2、PKM、LDHA基因转录极显著上调(P<0.01),PFK在十二指肠显著下调(P<0.05),在空肠和回肠极显著上调(P<0.01),糖酵解途径整体激活(图3)。

2.5 PEDV感染对仔猪小肠组织中TCA循环相关酶基因转录的影响

PEDV组CS在空肠和回肠极显著下调(P<0.01),IDH和OGDH在十二指肠、空肠、回肠均显著或极显著下调(P<0.05&P<0.01),TCA循环途径受抑制(图4)。

2.6 仔猪各肠段组织中RAS相关组分含量或蛋白的表达变化

2.6.1 AngII和Ang1-7含量    PEDV组十二指肠、空肠、回肠Ang1-7含量极显著降低(P<0.01),Ang II含量极显著升高(P<0.01),Ang II/Ang1-7失衡(表4)。

2.6.2 ACE2和MasR蛋白表达    PEDV组十二指肠、空肠、回肠ACE2和MasR蛋白表达极显著下调(P<0.01),ACE2-Ang1-7-MasR通路弱化(图5)。

2.7 PEDV感染与肠道ACE2-Ang1-7-MasR通路、葡萄糖转运蛋白及糖酵解关键酶蛋白表达的相关性分析

PEDV感染与SGLT-1、GLUT-2、HK2、PKM、PFK呈正相关,与ACE2-Ang1-7-MasR轴呈负相关;ACE2与SGLT-1、GLUT-2及糖酵解酶呈负相关(相关系数-0.66~-0.94),提示ACE2通路参与调控PEDV诱导的葡萄糖代谢重塑(图6)。

3 讨论

PEDV感染通过以下机制诱导Warburg效应:1)上调葡萄糖转运载体SGLT-1和GLUT-2表达,促进葡萄糖摄取;2)激活糖酵解关键酶(HK2、PFK、PKM、LDHA),促进乳酸生成;3)抑制TCA循环关键酶(CS、IDH、OGDH),降低氧化磷酸化;4)下调ACE2表达,弱化ACE2-Ang1-7-MasR通路,解除ACE2对糖酵解的负调控。这与SARS-CoV-2诱导Warburg效应的机制类似,但不同于猪丁型冠状病毒(PDCoV)诱导的非Warburg效应。ACE2可能通过Ang1-7/MasR通路负向调节糖酵解,PEDV感染导致ACE2下调后该调控作用减弱,从而促进Warburg效应。

4 结论

PEDV感染诱导仔猪肠道组织发生以葡萄糖摄取增强和乳酸堆积为特征的Warburg效应,表现为糖酵解途径激活、TCA循环抑制,且该代谢重塑与ACE2-Ang1-7-MasR通路下调呈负相关关系。ACE2介导的通路可能参与调控PEDV感染诱导的葡萄糖代谢过程,为深入理解PEDV致病机制及探索代谢干预靶点提供了理论依据。

关键词:血管紧张素转换酶2 ; 猪流行性腹泻病毒 ; Warburg效应 ; 葡萄糖转运蛋白

引用本文

陈雪清, 马畅, 王公民, 王换换, 张源淑. 猪流行性腹泻病毒感染诱导的Warburg效应与血管紧张素转换酶2的表达呈负相关关系[J]. 畜牧兽医学报, 2026, 57(3): 1661-1672 doi:10.11843/j.issn.0366-6964.2026.03.041
CHEN Xueqing, MA Chang, WANG Gongmin, WANG Huanhuan, ZHANG Yuanshu. The Negative Correlation was Observed between the Porcine Epidemic Diarrhea Virus Induced Warburg Effect and the Expression of Angiotensin-Converting Enzyme 2[J]. Acta Veterinaria et Zootechnica Sinica, 2026, 57(3): 1661-1672 doi:10.11843/j.issn.0366-6964.2026.03.041
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  1. CONNECT:[ UseTime:0.000460s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000797s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000309s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000272s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000471s ]
  6. SELECT * FROM `set` [ RunTime:0.000189s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000531s ]
  8. SELECT * FROM `article` WHERE `id` = 531496 LIMIT 1 [ RunTime:0.000514s ]
  9. UPDATE `article` SET `lasttime` = 1776492799 WHERE `id` = 531496 [ RunTime:0.006791s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000357s ]
  11. SELECT * FROM `article` WHERE `id` < 531496 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001796s ]
  12. SELECT * FROM `article` WHERE `id` > 531496 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000702s ]
  13. SELECT * FROM `article` WHERE `id` < 531496 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004621s ]
  14. SELECT * FROM `article` WHERE `id` < 531496 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.008667s ]
  15. SELECT * FROM `article` WHERE `id` < 531496 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005477s ]
0.100461s