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重庆医科大学感染性疾病分子生物学教育部重点实验室,重庆 400016
罗慧敏,Email:luohuimin@stu.cqmu.edu.cn,研究方向:乙型肝炎病毒复制的基础研究。
黄爱龙,Email:ahuang@cqmu.edu.cn。
收稿:2024-10-24,
修回:2025-01-03,
录用:2025-01-19,
纸质出版:2025-06-28
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罗慧敏,皮雨博,陈彦猛,等.DExH-box解旋酶9 O-GlcNAc修饰对HBV相关肝癌细胞增殖能力的影响[J].重庆医科大学学报,2025,50(6):799-807.
Luo Huimin,Pi Yubo,Chen Yanmeng,et al.Effect of DExH-box helicase 9 O-GlcNAc modification on the proliferation of HBV-associated hepatoma cells[J].Journal of Chongqing Medical University,2025,50(6):799-807.
罗慧敏,皮雨博,陈彦猛,等.DExH-box解旋酶9 O-GlcNAc修饰对HBV相关肝癌细胞增殖能力的影响[J].重庆医科大学学报,2025,50(6):799-807. DOI: 10.13406/j.cnki.cyxb.003824.
Luo Huimin,Pi Yubo,Chen Yanmeng,et al.Effect of DExH-box helicase 9 O-GlcNAc modification on the proliferation of HBV-associated hepatoma cells[J].Journal of Chongqing Medical University,2025,50(6):799-807. DOI: 10.13406/j.cnki.cyxb.003824.
目的
2
研究DExH-box解旋酶9(DExH-box helicase 9,DHX9)的氧连接-N-乙酰葡萄糖胺(O-linked N-acetylglucosamine,O-GlcNAc)修饰对乙型肝炎病毒(hepatitis B virus,HBV)相关肝癌细胞增殖能力的影响。
方法
2
通过分子克隆构建pAdTrack-TO4-DHX9-3Flag重组腺病毒质粒,并将重组腺病毒质粒转染至HEK293细胞中,包装、扩增重组腺病毒AdDHX9。通过免疫共沉淀实验检测DHX9与O-GlcNAc转移酶(O-GlcNAc transferase,OGT)的相互作用,免疫荧光实验研究DHX9与OGT共定位情况。通过琥珀酰化小麦胚芽凝集素(succinylated wheat germ agglutinin,sWGA)和糖基化免疫沉淀实验(immunoprecipitation,IP)检测DHX9 O-GlcNAc修饰水平。通过克隆形成实验和细胞生长曲线探索DHX9 O-GlcNAc修饰对HBV相关肝癌细胞增殖能力的影响。
结果
2
成功获得了重组腺病毒AdDHX9,经Western blot鉴定了DHX9的表达。DHX9与OGT相互作用,2者共定位于细胞核。sWGA和糖基化IP实验证实了DHX9能够发生O-GlcNAc修饰,并且HBV感染促进了DHX9 O-GlcNAc修饰水平。克隆形成实验显示,与AdGFP对照组(142.667±7.572)相比,AdDHX9组(386.667±15.630)的细胞克隆数量增加(
P
<
0.001)。细胞生长曲线结果显示,AdDHX9组(22.860±0.770)比AdGFP对照组(13.670±0.517)的细胞整体生长速率增加(
P
<
0.001)。
结论
2
HBV感染促进DHX9 O-GlcNAc修饰;DHX9 O-GlcNAc修饰增强HBV相关肝癌细胞的增殖能力。
Objective
2
To investigate the effect of DExH-box helicase 9(DHX9) O-linked N-acetylglucosamine(O-GlcNAc) modification(O-GlcNAcylation) on the proliferation of hepatitis B virus(HBV)-associated hepatoma cells.
Methods
2
The pAdTrack-TO4-DHX9-3Flag recombinant adenovirus plasmid was constructed by molecular cloning and transfected into HEK293 cells for packaging and amplification of the recombinant adenovirus AdDHX9. The interaction between DHX9 and O-GlcNAc transferase(OGT) was confirmed using co-immunoprecipitation. The co-localization between DHX9 and OGT was measured by immunofluorescence. The level of DHX9 O-GlcNAcylation was determined using succinylated wheat germ agglutinin(sWGA) and glycosylated immunoprecipitation (IP). The effect of DHX9 O-GlcNAcylation on the proliferation of HBV-associated hepatoma cells was assessed using the colony-forming assay and cell growth curves.
Results
2
The recombinant adenovirus AdDHX9 was successfully obtained,and DHX9 expression was confirmed by Western blot. DHX9 interacted with OGT,and the two proteins were co-localized on the nucleus. The sWGA and glycosylated IP experiments showed that DHX9 underwent O-GlcNAcylation,which was further enhanced by HBV infection. The colony-forming assay demonstrated that the number of cell clones was increased in the AdDHX9 group(386.667±15.630) compared with the AdGFP control group(142.667±7.572,
P
<
0.001). Mo
reover,cell growth curves demonstrated that the overall cell growth rate was enhanced in the AdDHX9 group(22.860±0.770) compared with the AdGFP control group(13.670±0.517,
P
<
0.001).
Conclusion
2
HBV infection promotes DHX9 O-GlcNAcylation,which enhances the proliferation of HBV-associated hepatoma cells.
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