Loss of CpG Methylation Is Strongly Correlated with Loss of Histone H3 Lysine 9 Methylation at DMR-LIT1 in Patients with Beckwith-Wiedemann Syndrome

Ken Higashimoto, Takeshi Urano, Kazumitsu Sugiura, Hitomi Yatsuki, Keiichiro Joh, Wei Zhao, Mayumi Iwakawa, Hirofumi Ohashi, Mitsuo Oshimura, Norio Niikawa, Tsunehiro Mukai, Hidenobu Soejima

研究成果: Article査読

43 被引用数 (Scopus)

抄録

To clarify the chromatin-based imprinting mechanism of the p57 KIF2/LIT1 subdomain at chromosome 11p15.5 and the mouse ortholog at chromosome 7F5, we investigated the histone-modification status at a differentially CpG methylated region of Lit1/LIT1 (DMR-Lit1/LIT1), which is an imprinting control region for the subdomain and is demethylated in half of patients with Beckwith-Wiedemann syndrome (BWS). Chromatin-immunoprecipitation assays revealed that, in both species, DMR-Lit1/LIT1 with the CpG-methylated, maternally derived inactive allele showed histone H3 Lys9 methylation, whereas the CpG-unmethylated, paternally active allele was acetylated on histone H3/H4 and methylated on H3 Lys4. We have also investigated the relationship between CpG methylation and histone H3 Lys9 methylation at DMR-LIT1 in patients with BWS. In a normal individual and in patients with BWS with normal DMR-LIT1 methylation, histone H3 Lys9 methylation was detected on the maternal allele; however, it disappeared completely in the patients with the DMR-LIT1 imprinting defect. These findings suggest that the histone-modification status at DMR-Lit1/LIT1 plays an important role in imprinting control within the subdomain and that loss of histone H3 Lys9 methylation, together with CpG demethylation on the maternal allele, may lead to the BWS phenotype.

本文言語English
ページ(範囲)948-956
ページ数9
ジャーナルAmerican Journal of Human Genetics
73
4
DOI
出版ステータスPublished - 01-10-2003
外部発表はい

All Science Journal Classification (ASJC) codes

  • 遺伝学
  • 遺伝学(臨床)

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