Diverse patterns of poly(A) tail elongation and shortening of murine maternal mRNAs from fully grown oocyte to 2-cell embryo stages

• Published in: Biochemical and biophysical research communications Vol. 336; no. 4; pp. 1181 - 1189
• Main Authors: Sakurai, Takayuki, Sato, Masahiro, Kimura, Minoru
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 04.11.2005
• Subjects: Animals; cDNA library; Cytoplasmic polyadenylation; Deadenylation; Embryo, Mammalian - physiology; Female; Fertilized egg; Gene Expression Profiling; Gene Expression Regulation, Developmental; Maternal RNA; Mice; Mouse; Oocyte; Oocytes - physiology; Poly A - genetics; Poly(A) tail; Polyadenylation; Preimplantation embryo; RNA, Messenger, Stored - biosynthesis; RNA, Messenger, Stored - genetics; Translational control; Deadenylation; Mouse; Fertilized egg; Maternal RNA; Poly(A) tail; Preimplantation embryo; Cytoplasmic polyadenylation; Translational control; Oocyte; cDNA library
• ISSN: 0006-291X; 1090-2104
• DOI: 10.1016/j.bbrc.2005.08.250

We previously succeeded in constructing a cDNA library, CPF7, enriched with cDNA derived from maternal RNAs with the extended poly(A) tail in mouse fertilized eggs. In this study, we performed RNA blot analysis to examine the elongation in maternal RNAs using 20 representative clones isolated from CPF7 as probes. Various patterns of elongation, shortening, and/or degradation of maternal RNAs were observed from fully grown oocytes to early 2-cell embryos and could be roughly classified into three types and seven subtypes. These findings indicate that poly(A) elongation and shortening of maternal RNAs are not restricted to certain types of maternal RNAs but occur in many of them, and suggest a complex mechanism governing modification of the 3′ end of maternal RNAs during the oocyte-to-embryo transition.