Title : DNA methylation of the 5'-untranslated region at +298 and +351 represses BACE1 expression in mouse BV-2 microglial cells.

Pub. Date : 2012 Jan 6

PMID : 22166205






8 Functional Relationships(s)
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1 Using the demethylating drug 5-aza-2"-deoxycytidine (5-Aza), we tested whether and how BACE1 expression is regulated in mouse BV-2 microglial cells. Decitabine beta-site APP cleaving enzyme 1 Mus musculus
2 5-Aza increased both BACE1 mRNA and protein levels in a dose-dependent manner. Decitabine beta-site APP cleaving enzyme 1 Mus musculus
3 Bisulfite-sequencing analysis revealed that two CpG sites at positions +298 and +351 in the 5"-untranslated region (5"-UTR) of the BACE1 gene were specifically demethylated in BV-2 cells treated with 5-Aza. Decitabine beta-site APP cleaving enzyme 1 Mus musculus
4 To assess whether these two CpG sites play an important role in 5-Aza-induced transcriptional activation of BACE1, we constructed a BACE1 gene promoter including the 5"-UTR (-1136 to +500) fused to a CpG-free luciferase gene (pCpGL-BACE1) and its mutant pCpGL-BACE1-AA, which has substituted CG dinucleotides at the two CpG sites of pCpGL-BACE1 to AA. Decitabine beta-site APP cleaving enzyme 1 Mus musculus
5 To assess whether these two CpG sites play an important role in 5-Aza-induced transcriptional activation of BACE1, we constructed a BACE1 gene promoter including the 5"-UTR (-1136 to +500) fused to a CpG-free luciferase gene (pCpGL-BACE1) and its mutant pCpGL-BACE1-AA, which has substituted CG dinucleotides at the two CpG sites of pCpGL-BACE1 to AA. Decitabine beta-site APP cleaving enzyme 1 Mus musculus
6 To assess whether these two CpG sites play an important role in 5-Aza-induced transcriptional activation of BACE1, we constructed a BACE1 gene promoter including the 5"-UTR (-1136 to +500) fused to a CpG-free luciferase gene (pCpGL-BACE1) and its mutant pCpGL-BACE1-AA, which has substituted CG dinucleotides at the two CpG sites of pCpGL-BACE1 to AA. Decitabine beta-site APP cleaving enzyme 1 Mus musculus
7 To assess whether these two CpG sites play an important role in 5-Aza-induced transcriptional activation of BACE1, we constructed a BACE1 gene promoter including the 5"-UTR (-1136 to +500) fused to a CpG-free luciferase gene (pCpGL-BACE1) and its mutant pCpGL-BACE1-AA, which has substituted CG dinucleotides at the two CpG sites of pCpGL-BACE1 to AA. Decitabine beta-site APP cleaving enzyme 1 Mus musculus
8 To assess whether these two CpG sites play an important role in 5-Aza-induced transcriptional activation of BACE1, we constructed a BACE1 gene promoter including the 5"-UTR (-1136 to +500) fused to a CpG-free luciferase gene (pCpGL-BACE1) and its mutant pCpGL-BACE1-AA, which has substituted CG dinucleotides at the two CpG sites of pCpGL-BACE1 to AA. Decitabine beta-site APP cleaving enzyme 1 Mus musculus