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PROMOTER-SPECIFIC IGF2 IMPRINTING STATUS AND ITS PLASTICITY DURING HUMAN LIVER DEVELOPMENT
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Physiology and Developmental Biology. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Physiology and Developmental Biology, Animal Development and Genetics. zoologisk utvecklingsbiologi.
1995 (English)In: DEVELOPMENT, ISSN 0950-1991, Vol. 121, no 2, 309-316 p.Article in journal (Refereed) Published
Abstract [en]

IGF2 has been shown to be expressed preferentially from the paternally derived allele, although the maternal allele can be found active during both prenatal and postnatal development as well as in neoplastic tumours in humans. We addressed here whether or not the biallelic expression patterns that can be seen during postnatal human liver development reflected a coordinated change in the activities of the four promoters of human IGF2. We show here that the P2, P3 and P4 promoters, but not the P1 promoter, display monoallelic activity in embryonic, neonatal and younger infant liver specimens. The P2, P3 and P4 promoters can, however, be found active either monoallelically or biallelically or even monoallelically on opposite parental alleles in older infant and adult liver specimens. In contrast, H19, which is closely linked to IGF2, is monoallelically expressed in all postnatal liver samples analysed. We conclude that the functional imprinting status of IGF2 during postnatal liver development appears to be promoter/enhancer-specific and either partly or completely independent of H19.

Place, publisher, year, edition, pages
1995. Vol. 121, no 2, 309-316 p.
Keyword [en]
IGF2; HUMAN; LIVER; PROMOTER; IMPRINTING; FACTOR-II GENE; BECKWITH-WIEDEMANN SYNDROME; MOUSE; RELAXATION
Identifiers
URN: urn:nbn:se:uu:diva-85229PubMedID: 7768174OAI: oai:DiVA.org:uu-85229DiVA: diva2:113137
Note
Addresses: KAROLINSKA HOSP, EXPTL ALCOHOL & DRUG ADDICT RES SECT, DEPT CLIN NEUROSCI, S-17176 STOCKHOLM, SWEDEN. UNIV UPPSALA, DEPT ANIM DEV & GENET, S-75236 UPPSALA, SWEDEN.Available from: 2007-02-12 Created: 2007-02-12 Last updated: 2011-01-15

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