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http://dx.doi.org/10.5352/JLS.2004.14.4.670

PGE2 Mediated INF-γ Gene Methylation Through cAMP Signaling Pathway in Human Jurkat T Cells  

Jeon, Byung-Hun (College of Oriental Medicine, Wonkwang University)
Ju, Sung-Min (College of Oriental Medicine, Wonkwang University)
Jeong, Jae-Sung (College of Oriental Medicine, Wonkwang University)
Kim, Myung-Wan (College of Oriental Medicine, Wonkwang University)
Yun, Young-Gab (College of Oriental Medicine, Wonkwang University)
Park, Hyun (School of Medicine & Medical Resources Research Center, Wonkwang University)
Chung Hun-taeg (School of Medicine & Medical Resources Research Center, Wonkwang University)
Han, Dong-Min (College of Natural Sciences and Institute of Basic Natural Sciences, Wonkwang University)
Kim, Won-Sin (College of Natural Sciences and Institute of Basic Natural Sciences, Wonkwang University)
Publication Information
Journal of Life Science / v.14, no.4, 2004 , pp. 670-675 More about this Journal
Abstract
We have examined the effects of S-nitroso-N-acetylpenicillamine (SNAP), prostaglandin $E_2$ (PG $E_2$) and dibutric cyclic AMP (dbcAMP) on the methylation of interferon- ${\gamma}$ (IFN- ${\gamma}$ ) gene in human Jurkat T cells. The CpG dinucleotide which is critical for promoter function of IFN- ${\gamma}$ gene was methylated by treatment with SNAP, PG $E_2$ and dbcAMP, respectively. The DNA methylation induced by PG $E_2$ was suppressed by the addition of 2',5'-dideoxyadenosine (DDA), an inhibitor of adenylyl cyclase, but the suppression was not observed in SNAP treated cells. The NO production was not enhanced in PG $E_2$ or dbcAMP treated cells. The methylation induced by PG $E_2$ and dbcAMP was not suppressed by the addition of $N^{G}$-methyl-L-arginine (L-NMMA), NO synthase inhibitor. In conclusion, the inhibition of INF- ${\gamma}$ gene expression by PG $E_2$ was associated with the methylation of INF- ${\gamma}$ gene by elevation of intracellular cAMP in human Jurkat T cells. However, the methylation induced by PG $E_2$ might not be mediated through the NO production.rough the NO production.
Keywords
INF-$_{gamma}$; CpG dinucleotide; Methylation; Nitric oxide; PG $E_2$;
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