RGD Reference Report - Alterations in promoter usage and expression levels of insulin-like growth factor-II and H19 genes in cervical carcinoma exhibiting biallelic expression of IGF-II. - Rat Genome Database

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Alterations in promoter usage and expression levels of insulin-like growth factor-II and H19 genes in cervical carcinoma exhibiting biallelic expression of IGF-II.

Authors: Kim, SJ  Park, SE  Lee, C  Lee, SY  Jo, JH  Kim, JM  Oh, YK 
Citation: Kim SJ, etal., Biochim Biophys Acta. 2002 Apr 24;1586(3):307-15.
RGD ID: 2306179
Pubmed: PMID:11997082   (View Abstract at PubMed)

Biallelic expression of insulin-like growth factor-II (IGF2) has been reported to be associated with progression of several tumors. Here, we report that the promoter usage and expression levels of IGF2 and H19 were altered in cervical carcinoma showing loss of imprinting. The imprinting status was examined in 32 cervical carcinomas and their matched normal tissues. Loss of imprinting (LOI) of IGF2 was observed in seven of 18 (39%) informative cases. LOI of H19 gene was detected in five of 14 informative cases. The usage of promoter P1 was observed in LOI tumors of IGF2, but not in the tumors showing maintenance of IGF2 imprinting (MOI) and in the normal cervical tissues. Unlike MOI tumors, some LOI tumors revealed the lack of IGF2 transcription from promoter P3. LOI tumors of IGF2 showed an increased expression level of IGF2 but a down-regulation of H19 relative to the normal tissues whereas MOI tumors did not reveal significant alterations. These results suggest that promoter P1 could be involved in the biallelic expression of IGF2 and that the altered expression levels of IGF2 and H19 gene might be associated with the progression of cervical carcinoma showing biallelic expression of IGF2.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
cervix carcinoma  ISOH19 (Homo sapiens)2306179mRNA:decreased expression:uterine cervixRGD 
cervix carcinoma  IEP 2306179mRNA:decreased expression:uterine cervixRGD 
Uterine Cervical Neoplasms  ISOH19 (Homo sapiens)2306179mRNA:decreased expression:uterine cervixRGD 

Objects Annotated

Genes (Rattus norvegicus)
H19  (H19 imprinted maternally expressed transcript)

Genes (Mus musculus)
H19  (H19, imprinted maternally expressed transcript)

Genes (Homo sapiens)
H19  (H19 imprinted maternally expressed transcript)


Additional Information