The invention provides a method for regulating and controlling the
transcriptional activity of a PAFAH1B1
gene and application of the method, and belongs to the technical field of
gene expression regulation and control. The method comprises the step of influencing the
methylation level of a PAFAH1B1
gene promoter region by using a gRNA fragment,
a DNA methyltransferase inhibitor or an
RNA interference fragment of
DNA methyltransferase. The method is applied to the ovarian granulosa cells, and under different treatments, the
mRNA level and the
protein expression level of PAFAH1B1 in the ovarian granulosa cells can be remarkably promoted or inhibited. According to the application, the obvious influence of
DNA methylation on the
transcriptional activity of the PAFAH1B1 gene in the ovarian granular cells is determined for the first time, the position of the
DNA methylation applied to the
promoter region of the PAFAH1B1 gene is determined for the first time, and the mechanism that the
DNA methylation affects the expression of the PAFAH1B1 gene by changing the
chromatin structure of the
promoter region of the PAFAH1B1 gene is disclosed, so that the expression of the PAFAH1B1 gene in the ovarian granular cells is improved. The invention provides a simpler and more effective new way for regulating and controlling
granular cell functions and ovarian development, and has important application value for subsequent research on
mammal ovarian
granular cell functions, follicular development and initial estrus
initiation.