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Transcription from the beta-casein milk protein gene promoter is induced by the synergistic action of glucocorticoid and prolactin hormones in the murine mammary epithelial cell line, HC11. We analyzed the binding of nuclear proteins to the promoter and determined their binding sites. Site-directed mutagenesis was used to determine the function of nuclear(More)
Pancreatic islet microendothelium and beta cells exhibit an interdependent physical and functional relationship. In this study, we analyzed the effect of chronic hyperglycemia on human pancreatic islet microendothelial cells as well as the involvement of the phosphatidylinositol 3-kinase/Akt and nephrin pathways, interleukin-1beta, and nitric oxide(More)
Two novel mutations in the sex-determining gene SRY were identified by screening DNA from 30 sex-reversed XY females by using the SSCP assay. Both point mutations lead to an amino acid substitution in the DNA-binding high-mobility-group domain of the SRY protein. The first mutation, changing a serine at position 91 to glycine, was found in a sporadic case.(More)
During the lactation period, mammary epithelial cells secrete large amounts of milk proteins. The coordinate regulation of milk protein expression is effected by the lactogenic hormones. We have investigated the activity of a mammary gland-specific transcription factor (MGF), which mediates hormonal influences at the level of a milk protein gene promoter.(More)
Rhabdomyosarcoma (RMS) is a highly malignant soft-tissue tumor of childhood deriving from skeletal muscle cells. RMS can be classified in two major histologic subtypes: embryonal (ERMS) and alveolar (ARMS), the latter being characterized by the PAX3/7-FKHR translocation. Here we first investigated whether the Met receptor, a transcriptional target of PAX3(More)
The mammary gland-specific nuclear factor (MGF) is a crucial contributor to the regulation of transcription from the beta-casein gene promoter. The beta-casein gene encodes a major milk protein, which is expressed in mammary epithelial cells during lactation and can be induced by lactogenic hormones in the clonal mammary epithelial cell line HC11. We have(More)
Mammary epithelial cells, under the regulation of the lactogenic hormones, produce high amounts of milk proteins during the lactation period. The caseins are the most abundant milk proteins. We have studied the regulation of beta-casein gene expression and found that the lactogenic hormones induce transcription of the beta-casein gene promoter. The hormonal(More)
The transcription factor CHOP is involved in the regulation of the cell division cycle and the control of programmed cell death in response to cellular stress. CHOP expression has been linked with several forms of cancer. A reciprocal translocation between the CHOP and TLS RNA-binding protein gene results in myxoid liposarcoma and amplifications of the CHOP(More)
Vasculogenesis, or recruitment of progenitors able to differentiate into endothelial-like cells, may provide an important contribution to neovessel formation in tumors. However, the factors involved in the vasculogenic process and in particular the role of the epithelial-mesenchymal transition of tumor cells have not yet been investigated. We found a(More)
CHOP/GADD153 is both an activating and repressing transcription factor that is markedly induced in response to a variety of cellular stresses. The CHOP/GADD153 gene was originally cloned because of its inducibility by ultraviolet light wavelength band C (UVC) and has since been found to be activated in response to many different cellular stresses. Some of(More)