To understand the changes in mRNA expression during the embryonic development of the external mouse ear after the point mutation of the Prkra gene, Prkra short ear mouse model was used to study the development of the embryonic external ear. The tissues of the embryonic external ear were obtained when mouse embryos developed to E15.5 and E17.5. The changes in the mRNA expression profile were detected and analyzed. Find_circ and CIRI2 softwares were used to identify the upregulated and down-regulated expression of mRNA in the experimental and control groups. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes functional annotations were conducted on the differentially expressed mRNA, and the related signal pathways were analyzed after the upregulation and down-regulation of mRNA expression. This study aimed to understand the regulation of mRNA expression in Prkra short-ear mice during the external ear development in embryos. The results showed a correlation between abnormally expressed mRNA and signal pathways and the regulation of the development of the external ear of Prkra short-ear mice, and there were differences in some key regulatory mRNA changes after the Prkra gene point mutation. This study will provide a new clue for the mechanism of mRNA regulating the development of the external mouse ear. The change in mRNA expression profile can also provide clues for studying the biological regulation mechanism of external ear embryonic development.
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