Dynamic expression pattern of Pde4d and its relationship with CpG methylation in the promoter during mouse embryo development.
Mouse Pde4d is located on chromosome 13 and serves many functions in important physiological processes involving cyclic adenosine monophosphate. In this study, imprinting analysis indicated that Pde4d exhibits a dynamic and specific allelic expression pattern during embryo development. This showed paternal-origin sex bias in embryonic day 9.5 (E9.5) whole embryos and placenta, and biallelic expression in the major embryonic organs and placenta at E15.5. In situ hybridization determined the spatiotemporal expression pattern of Pde4d in mouse embryos from the mid- to late-embryonic stages. This demonstrated that Pde4d was widely expressed in the neural tissues, including the forebrain, midbrain, hindbrain, and neural tube, at the mid-embryonic stage. By the late-embryonic stage, Pde4d was extensively detected throughout the developing organism, including in the liver, brain, lung, kidney, and tongue. In addition, methylation analyses indicated that tissue-specific CpG methylation of the Pde4d promoter was correlated with Pde4d mRNA expression in major E15.5 tissues. Furthermore, stage-specific CpG methylation of the Pde4d promoter was associated with gene expression in the liver at three developmental stages. Our results suggest that Pde4d might serve specific biological functions in regulating the development process of the mouse embryo, and that CpG methylation of the Pde4d promoter may play an important role in regulating Pde4d at a transcriptional level.
School of Life Science and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No.92 West Da-zhi Street, Harbin, Heilongjiang 150001, China.
Zhijun
Z
Huang
Zhengbin
Z
Han
Wei
W
Cui
Fengwei
F
Zhang
Hongjuan
H
He
Tiebo
T
Zeng
Kenkichi
K
Sugimoto
Qiong
Q
Wu
D000818:Animals; D002460:Cell Line; D018899:CpG Islands / Q000235:genetics*; D054703:Cyclic Nucleotide Phosphodiesterases, Type 4 / Q000235:genetics*; D019175:DNA Methylation; D004622:Embryo, Mammalian / Q000201:enzymology*; D047108:Embryonic Development / Q000235:genetics*; D005260:Female; D018507:Gene Expression Regulation, Developmental; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D011401:Promoter Regions, Genetic; D012333:RNA, Messenger / Q000096:biosynthesis; D012737:Sex Factors; D014158:Transcription, Genetic
D012333:RNA, Messenger; D054703:Cyclic Nucleotide Phosphodiesterases, Type 4; C531980:PDE4D protein, mouse
Methylation; Paternally-biased; Pde4d; Spatiotemporal