Loss of imprinting of IGF2 and not H19 in breast cancer, adjacent normal tissue and derived fibroblast cultures

FEBS Letters

Eggermont, A.M.M²  Klijn, J.G.M¹  van Roozendaal, C.E.P¹  Foekens, J.A¹  Looijenga, L.H.J⁴  Gillis, A.J.M⁴  Henzen-Logmans, S.C³  Oosterhuis, J.W⁴  van Ooijen, B²  Claassen, C.J.C¹ 

[1]Division of Endocrine Oncology (Department of Medical Oncology), Daniel den Hoed Cancer Center/Academic Hospital, Groene Hilledijk 301, 3075 EA Rotterdam, The Netherlands

[2]Department of Surgical Oncology, Daniel den Hoed Cancer Center/Academic Hospital, Rotterdam, The Netherlands

[3]Department of Pathology, Daniel den Hoed Cancer Center/Academic Hospital, Rotterdam, The Netherlands

[4]Laboratory for Experimental Patho-Oncology, Daniel den Hoed Cancer Center/Academic Hospital, Rotterdam, The Netherlands

关键词: Breast cancer;    Stromal fibroblast;    Insulin-like growth factor;    Genomic imprinting;   

DOI  :  10.1016/S0014-5793(98)01211-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Insulin-like growth factors are involved in the paracrine growth regulation of human breast tumor cells. IGF2 is imprinted in most tissues, and shows expression of the paternal allele only. To investigate whether disruption of this monoallelic IGF2 expression is involved in breast cancer development, a series of primary tumors and adjacent, histologically normal, breast tissue samples, as well as matched primary in vitro fibroblast cultures were studied. Biallelic expression (partial) of IGF2 was found in the majority of in vivo samples, and corresponding fibroblast cultures, while monoallelic expression was found in a normal breast sample. In contrast, H19, a closely apposed, but reciprocally imprinted gene, assumed to be regulated by a common control element, showed retention of monoallelic H19 expression in all in vivo and in the majority of in vitro samples. These data indicate that IGF2, but not H19, is prone to loss of imprinting in breast cancer.

【 授权许可】

Unknown