RGD Reference Report - Role of epigenetic regulatory mechanisms in neonatal hypoxic-ischemic brain injury. - Rat Genome Database

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Role of epigenetic regulatory mechanisms in neonatal hypoxic-ischemic brain injury.

Authors: Kumral, Abdullah  Tuzun, Funda  Tugyan, Kazim  Ozbal, Seda  Yilmaz, Osman  Yesilirmak, Cemile Didem  Duman, Nuray  Ozkan, Hasan 
Citation: Kumral A, etal., Early Hum Dev. 2013 Mar;89(3):165-73. doi: 10.1016/j.earlhumdev.2012.09.016. Epub 2012 Oct 6.
RGD ID: 13782359
Pubmed: PMID:23046993   (View Abstract at PubMed)
DOI: DOI:10.1016/j.earlhumdev.2012.09.016   (Journal Full-text)


BACKGROUND: DNA methylation and histone modifications are the most identified modifications that selectively activate or inactivate genes that control cell growth, proliferation, and apoptosis.
AIM: We hypothesized that alterations in gene expression due to hypoxic-ischemic brain damage was regulated by epigenetic mechanisms including DNA methylation and histone methylation.
STUDY DESIGN: To test this hypothesis, we established a rat model of HIE. Three groups were defined as hypoxic-ischemic, sham-operated, and control group.
OUTCOME MEASUREMENTS: The validity of the HIE model used in this study was confirmed by histological and immunohistochemical tests. Gene expressions related with apoptosis and angiogenesis were studied at 0.5, 3, 6 and 24h after HI or sham operation. DNA and histone methylation status was studied in the genes showing significant change in expression.
RESULTS AND CONCLUSIONS: Most of the genes related with apoptosis and angiogenesis (Epo, Epor, Hif 1α, Hif3α, VEGFa, VEGFc, Casp1, Casp9, and Casp8ap2) induced early after HI (30min). All of these genes were unmethylated at the beginning of the insult and in the control group. DNA methylation percentage and histone methylation (H3K36) levels were not correlated with gen expression levels. To our knowledge this is the first study evaluating the role of epigenetic mechanisms in HIE model, therefore the absence of similar studies don't allow us to compare the present results. Further studies investigating different epigenetic mechanisms are needed.

RGD Manual Disease Annotations    Click to see Annotation Detail View

Objects Annotated

Genes (Rattus norvegicus)
Casp1  (caspase 1)
Casp3  (caspase 3)
Casp8  (caspase 8)
Casp9  (caspase 9)

Genes (Mus musculus)
Casp1  (caspase 1)
Casp3  (caspase 3)
Casp8  (caspase 8)
Casp9  (caspase 9)

Genes (Homo sapiens)
CASP1  (caspase 1)
CASP3  (caspase 3)
CASP8  (caspase 8)
CASP9  (caspase 9)


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