Maria Lúcia Hirata Katayama

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Urokinase plasminogen activator (uPA), its cell-bound receptor (uPAR) and its main inhibitor plasminogen activator type 1 (PAI-1) are present primarily in stromal cells in invasive breast carcinoma. The purpose of this study was to investigate the regulation by 1,25 dihydroxyvitamin-D3 (VD3) of these invasion-associated markers expressed in breast cancer(More)
PURPOSE This study was designed to identify genes that could predict response to doxorubicin-based primary chemotherapy in breast cancer patients. EXPERIMENTAL DESIGN Biopsy samples were obtained before primary treatment with doxorubicin and cyclophosphamide. RNA was extracted and amplified and gene expression was analyzed using cDNA microarrays. (More)
The hormone 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3), the active form of vitamin D3, is an important regulator of calcium homeostasis, exerts antiproliferative effects on various cell systems and can induce differentiation in some kinds of hematopoietic cells. These effects are triggered by its receptor, vitamin D receptor (VDR), a phosphoprotein member of(More)
While many studies have addressed the direct effects of 1alpha,25(OH)2D3 on breast cancer (BC) cells, stromal-epithelial interactions, which are important for the tumor development, have been largely ignored. In addition, high concentrations of the hormone, which cannot be attained in vivo, have been used. Our aim was to establish a more physiological(More)
Eosinophils accumulate into the uterus of ovariectomized rats, after treatment with estradiol (E2). We have investigated whether this feature is related to interactions of eosinophils with uterine extracellular matrix proteins: laminin (LM) and fibronectin (FN). Eosinophils isolated from the peritoneal cavity of ovariectomized rats displayed estrogen(More)
BACKGROUND The purpose of this study was to evaluate collagen deposition, mRNA collagen synthesis and TGF-beta expression in the lung tissue in an experimental model of scleroderma after collagen V-induced nasal tolerance. METHODS Female New Zealand rabbits (N = 12) were immunized with 1 mg/ml of collagen V in Freund's adjuvant (IM). After 150 days, six(More)
HER-2-positive breast cancers frequently sustain elevated AKT/mTOR signaling, which has been associated with resistance to doxorubicin treatment. Here, we investigated whether rapamycin, an mTOR inhibitor, increased the sensitivity to doxorubicin therapy in two HER-2-overexpressing cell lines: C5.2, which was derived from the parental HB4a by transfection(More)
Vitamin D (VD), is a steroid hormone with multiple functions in the central nervous system (CNS), producing numerous physiological effects mediated by its receptor (VDR). Clinical and experimental studies have shown a link between VD dysfunction and epilepsy. Along these lines, the purpose of our work was to analyze the relative expression of VDR mRNA in(More)
The importance of epithelial-stroma interaction in normal breast development and tumor progression has been recognized. To identify genes that were regulated by these reciprocal interactions, we cocultured a nonmalignant (MCF10A) and a breast cancer derived (MDA-MB231) basal cell lines, with fibroblasts isolated from breast benign-disease adjacent tissues(More)
BACKGROUND In women with breast cancer submitted to neoadjuvant chemotherapy based in doxorubicin, tumor expression of groups of three genes (PRSS11, MTSS1, CLPTM1 and PRSS11, MTSS1, SMYD2) have classified them as responsive or resistant. We have investigated whether expression of these trios of genes could predict mammary carcinoma response in dogs and(More)