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PATERNALLY DERIVED H19 IS DIFFERENTIALLY EXPRESSED IN MALIGNANT AND NONMALIGNANT TROPHOBLAST

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Walsh, Colum, MILLER, SJ, FLAM, F, FISHER, RA and OHLSSON, R (1995) PATERNALLY DERIVED H19 IS DIFFERENTIALLY EXPRESSED IN MALIGNANT AND NONMALIGNANT TROPHOBLAST. CANCER RESEARCH, 55 (5). pp. 1111-1116. [Journal article]

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Abstract

The paternal allele of the H19 gene has been shown to be transcriptionally inactive in the developing human embryo. Using reverse transcription PCR and RNase protection assays, we demonstrate that expression of H19 is predominantly, but not exclusively, from the maternal allele in the human placenta. In situ hybridization analysis shows strong expression of the H19 gene in eight complete hydatidiform moles, hyperplastic tissues consisting of trophoblasts which contain only paternally derived genetic material, indicating that H19 is not functionally imprinted in this tissue. H19, a putative growth suppressor, is oppositely imprinted to the neighboring insulin-like growth factor II (IGF2) gene and an up-regulation of IGF2 expression has been linked previously to a down-regulation of H19 expression in the progression to Wilms' tumor. Two cases of complete hydatidiform mole which progressed to choriocarcinoma show high levels of expression of both H19 and IGF2. The choriocarcinomas which developed from these complete hydatiform moles showed similar expression of IGF2 but a decreased number of H19-positive cells, which may reflect selection for cells expressing IGF2 and against those expressing H19 in this tissue.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Molecular Medicine
Biomedical Sciences Research Institute > Molecular Medicine > Transcriptional Regulation & Epigenetics
ID Code:21701
Deposited By:Professor Colum Walsh
Deposited On:02 Apr 2012 11:04
Last Modified:11 Dec 2012 15:39

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