Sex steroid receptor expression in 'carcinoid' tumours of the breast.

Nine 'carcinoids' of the breast (argyrophilic carcinomas) were examined for the presence of estrogen receptor (ER), progesterone receptor (PR), and androgen receptor (AR), using immunohistochemistry. The tumours were selected on the basis of their histo-morphological appearance and positive Grimelius stain. All cases were immunoreactive for neuron-specific enolase (NSE).

Immunohistochemical and prognostic analysis of apoptosis and proliferation in uveal melanoma.

Neoplasia can be defined as deregulated tissue homeostasis caused by an imbalance between proliferation and apoptosis. Many genes are involved in the maintenance of tissue homeostasis, eg, the c-myc oncoprotein, which is an important regulator of cell proliferation and Bcl-2 protein, which is involved in the regulation of apoptosis. We studied retrospectively indices of proliferation, such as mitotic count and the Mib-1 index, on 51 uveal melanomas and compared their prognostic significance with established indicators of prognosis such as cell type and tumor size.

Androgen receptor expression in the cervix of androgen-treated female-to-male transsexuals: association with morphology and chain-specific keratin expression.

Long-term androgen treatment of female-to-male transsexuals is associated with morphological changes of the ectocervical epithelium. This study was designed to correlate the histological changes of the ectocervix to modulation of androgen receptor (AR) and keratin expression. We evaluated AR expression by immunohistochemistry using monoclonal antibody F39.

An immunohistochemical evaluation of androgen and progesterone receptors in ovarian tumors.

To visualize the heterogeneity of androgen receptor (AR) and progesterone receptor (PR) expression in ovarian tumors, 61 specimens were studied immunohistochemically using specific mouse monoclonal antibodies. The tested ovarian tumors included ovarian carcinomas of serous, mucinous, endometrioid, undifferentiated, and clear cell types as well as borderline epithelial tumors, mucinous cystadenomas, granulosa cell tumors, metastatic ovarian tumors, and one case of immature teratoma. Sixty-seven percent of ovarian carcinomas expressed AR, while 46% of the ovarian carcinomas expressed PR.

Domains of the human androgen receptor involved in steroid binding, transcriptional activation, and subcellular localization.

A series of human androgen receptor (AR) deletion mutants was constructed to study the relationship between the structural domains and their different functions in the AR protein. Human AR mutants were expressed in COS-1 and HeLa cells to investigate hormone binding, transcriptional activation, and subcellular localization. The wild-type human AR (AR 1-910) was expressed as a 110- to 112-kDa doublet, as revealed on immunoblots.