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The expression of £]igh3 is regulated by TGF£]3, a critical signaling protein regulates embryonic palate development. Recently, £]igh3 was reported to regulate apoptosis during embryonic palate fusion, infer that TGF£]3 may regulate embryonic palate fusion through upregulating £] igh3. Interferon regulatory factor 6 (IRF6) is a transcriptional factor which also involves in embryonic palate fusion. Mutations in IRF6 cause Van der Woude syndrome and popliteal pterygium syndrome, both of which show defects in embryo palate fusion and epidermis fusion. However, the biological function of IRF6 is still not clear. According to the predicted protein functional domain, IRF6 may interact with Smad, an important signaling protein in TGF£]3 pathway, suggesting that £]igh3, IRF6 and TGF£]3 may cooperate to regulate palate development. To investigate the crosstalk within £]igh3, IRF6 and TGF£]3 and the mechanisms that they regulate palate development, we focus on searching the downstream genes of IRF6 in this study. We first searched the downstream target genes of IRF6 with predicted IRF6 binding consensus sequences by bioinformatics methods, and derived 12 candidate genes. Then we analyzed the expression changes of these target genes after knockdown or overŸìexpression of IRF6 gene in epithelial cells. Our results indicated that mRNA of NAPEPLD, PSRC1, DYRK1A, KIAA1841, CLDN23, BUB1, IFIT5 and NBR1, as well as the BUB1 protein were upŸìregulated by IRF6 overexpression in HEK293T cell line. While the mRNA of KIAA1841, CLDN23, BUB1 and NBR1 were downŸìregulated when IRF6 expression was knockdown in CE48T/VGH cells. These data suggesting that KIAA1841, CLDN23,BUB1 and NBR1 maybe the downstream target genes of IRF6,however,the roles of these genes in embryonic palate fusion still need further investigation. -- ¡° µo«H¯¸: §å½ð½ð¹ê·~§{(ptt.cc) ¡» From: 124.8.0.10 |
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