Your browser version may not work well with NCBI's Web applications. More information here...
1: Cancer Res. 1998 Jan 15;58(2):210-4.Click here to read Links

Expression of estrogen receptor beta messenger RNA variant in breast cancer.

Vladusic EA, Hornby AE, Guerra-Vladusic FK, Lupu R.

Lawrence Berkeley National Laboratory, University of California, Berkeley 94710, USA.

Estrogen receptor (ER) beta is expressed in a number of tissues, including the breast. We have recently shown that ER-beta mRNA is regulated by estradiol (E2) and that antiestrogens antagonize E2 induction of ER-beta mRNA. Here, we identify by reverse transcription-PCR and by the RNase protection assay a mRNA coding for a variant of ER-beta that is coexpressed with wild-type ER-beta in the ER-alpha-negative, estrogen-independent breast cancer cell line MDA-MB-231 and in malignant breast tumor specimens. In contrast, this variant was not seen in the tested normal breast tissue. Sequence analysis of the ER-beta variant PCR product revealed the absence of 139 bp within the hormone-binding domain. This ER-beta deletion corresponds precisely to the entire exon 5 of ER-alpha. The ER-beta variant protein is predicted to lack part of the hormone-binding domain and may bind E2 with lower affinity than the wild-type ER-beta protein.

PMID: 9443393 [PubMed - indexed for MEDLINE]

Patient Drug Information

  • Estrogen (Cenestin® , Enjuvia® , Estrace® , ...)

    Estrogen is used to treat hot flushes ('hot flashes'; sudden strong feelings of heat and sweating) in women who are experiencing menopause ('change of life', the end of monthly menstrual periods). Some brands of estrogen...

  • Source: AHFS Consumer Medication Information