Premium
Promoter‐specific insulin‐like growth factor 2 gene imprinting in human fetal liver and hepatoblastoma
Author(s) -
Yun Kankatsu,
Jinno Yoshihiro,
Sohda Tetsuro,
Niikawa Norio,
Ikeda Takayoshi
Publication year - 1998
Publication title -
the journal of pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.964
H-Index - 184
eISSN - 1096-9896
pISSN - 0022-3417
DOI - 10.1002/(sici)1096-9896(199805)185:1<91::aid-path44>3.0.co;2-k
Subject(s) - hepatoblastoma , genomic imprinting , fetus , imprinting (psychology) , insulin like growth factor 2 , biology , gene , insulin like growth factor , cancer research , growth factor , genetics , medicine , pregnancy , gene expression , dna methylation , receptor
Insulin‐like growth factor 2 ( IGF2 ) gene imprinting has been demonstrated to be promoter‐specific, in that expression from the P1 promoter is biallelic whereas that from the P2–P4 promoters is monoallelic. In the present study, in order to investigate IGF2 gene imprinting status at the cellular level, allelic analysis was performed of IGF2 gene expression transcribed from the P1 and P3 promoters, using reverse transcription polymerase chain reaction (RT‐PCR) on human fetal liver and hepatoblastoma. In situ hybridization was also undertaken, to obtain information about the cellular localization of transcripts expressed from the P1 and P3 promoters. The results indicated that transcripts expressed from the P1 and P3 promoters co‐localized in the same fetal or neoplastic hepatocytes. These data should provide information regarding the molecular basis of genomic imprinting, suggesting that an imprint recognized for the differential expression may be strictly local and localized downstream of the IGF2 P1 promoter. © 1998 John Wiley & Sons, Ltd.