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1.100020 北京,首都儿科研究所,北京市儿童发育组学重点实验室
2.100020 北京,北京协和医学院研究生院
[王珊,E-mail:wsaquarius@sina.comWANG Shan, E-mail: wsaquarius@sina.com
收稿:2022-03-21,
修回:2022-08-07,
纸质出版:2023-01-15
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曾雨冰, 刘帆, 裴培, 等. 低叶酸联合甲氨蝶呤诱导神经管畸形胎鼠模型的lncRNA相关ceRNA网络构建及分析[J]. 陆军军医大学学报, 2023,45(1):1-9.
Yubing ZENG, Fan LIU, Pei PEI, et al. Construction and analysis of lncRNA-related ceRNA network in mouse model of methotrexate-induced neural tube defect under folate deficiency[J]. Journal of Army Medical University, 2023, 45(1): 1-9.
曾雨冰, 刘帆, 裴培, 等. 低叶酸联合甲氨蝶呤诱导神经管畸形胎鼠模型的lncRNA相关ceRNA网络构建及分析[J]. 陆军军医大学学报, 2023,45(1):1-9. DOI: 10.16016/j.2097-0927.202203181.
Yubing ZENG, Fan LIU, Pei PEI, et al. Construction and analysis of lncRNA-related ceRNA network in mouse model of methotrexate-induced neural tube defect under folate deficiency[J]. Journal of Army Medical University, 2023, 45(1): 1-9. DOI: 10.16016/j.2097-0927.202203181.
目的
2
构建低叶酸联合甲氨蝶呤(methotrexate,MTX)诱导神经管畸形(neural tube defect,NTDs)的胎鼠模型中lncRNA相关的竞争性内源RNA(competing endogenous RNAs,ceRNA)调控网络,探讨低叶酸条件下NTDs中lncRNA可能的调控作用。
方法
2
利用SPF级、7~8周龄的健康雌性C57BL/6J小鼠(体质量18~22 g)40只及健康雄性C57BL/6J小鼠(体质量20~22 g)20只,建立叶酸缺乏情况下的NTDs胎鼠模型为实验组,并设立对照组,每组选取3只胎鼠分离脑组织并提取总RNA,进行高通量RNA测序(RNA sequencing
RNA-seq),并对测序结果进行lncRNA-mRNA共表达网络构建、对共表达网络中mRNA进行GO功能富集及KEGG通路富集分析、构建lncRNA相关ceRNA调控网络,并用qPCR验证胎鼠、细胞样本中lncRNA Xist、Sema4f、Padi2的相对表达量。
结果
2
测序共检测到差异lncRNA 47个(Log
2
FC>0.585或Log
2
FC<-0.585,FDR
<
0.05),其中上调38个,下调9个。构建lncRNA和mRNA基因间的共表达网络,并对共表达网络关系中的mRNA进行KEGG/GO功能富集分析,发现GO条目中管道发育(
P
<
0.001)、胶原蛋白代谢过程(
P
=0.002)、系统发育(
P
=0.002)等显著富集,在KEGG通路分析中富集到与NTDs密切相关的PI3K-Akt通路;构建lncRNA相关ceRNA调控网络,发现lncRNA Xist、LOC102633899、1700086L19Rik等靶向差异基因Sema4f、Padi2、Lin28a等;选取与神经发育密切相关的lncRNA Xist及预测的靶基因Sema4f、Padi2,用qPCR验证胎鼠脑组织、细胞样本,结果与测序一致,相较对照组,均显著下调(
P
<
0.05)。
结论
2
在叶酸缺乏下的NTDs胎鼠模型中lncRNA Xist及预测的靶基因Sema4f、Padi2发生显著下调。
Objective
2
To construct a regulatory network of long noncoding RNA (lncRNA)-related competing endogenous RNAs (ceRNA) in low folate combined with methotrexate (MTX) induced neural tube defects (NTDs) mouse model
and to explore the potential lncRNAs regulation in low folate-induced NTDs.
Methods
2
Forty SPF-grade 7~8-week-old healthy female C57BL/6J mice (body weight 18~22 g) and 20 healthy male C57BL/6J mice (20~22 g) were selected to this experiment. After a folate deficiency induced fetal mouse NTD model was successfully established
the embryonic brain tissues were extracted for total RNA and RNA high-throughput sequencing (RNA-seq) was performed. The results of RNA-seq were used to carry out co-expression network construction
GO function enrichment of mRNA in co-expression network and KEGG pathway enrichment analysis
construction of lncRNA-related ceRNA regulation network and other bioinformatics analysis. And the relative expression of lncRNA Xist
Sema4f and Padi2 in the fetal mouse and cell samples was verified by qPCR.
Results
2
A total of 47 differential lncRNAs (Log
2
FC
>
0.585 or Log
2
FC
<
-0.585
FDR
<
0.05) were detected by RNA-seq
of which 38 were up-regulated and 9 were down-regulated. The co-expression network between lncRNA and mRNA was constructed. The results of KEGG/GO analysis on mRNAs in the co-expression network indicated that tube development (
P
<
0.001)
collagen metabolic process (
P
=0.002)
system development (
P
=0.002) and other significant enrichments were highly relevant to NTDs. Besides
KEGG pathway analysis displayed that the PI3K-Akt pathway was closely related to NTDs; lncRNA Xist
LOC102633899
1700086L19Rik and other targeting differential genes Sema4f
Padi2
Lin28a were found in the lncRNA-related ceRNA network. qPCR confirmed that the above results in the fetal mice and cell samples under folic acid
deficiency
with consistent corresponding sequences
and obviously down-regulated (
P
<
0.05).
Conclusion
2
In folic acid deficiency-induced mouse NTD model
lncRNA Xist
and its targeting genes Sema4f and Padi2 are obviously down-regulated.
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