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Epidermal growth factor receptor tyrosine kinase inhibitor reverses mesenchymal to epithelial phenotype and inhibits metastasis in inflammatory breast cancer.

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OBJECTIVE Inflammatory breast cancer (IBC) is a rare but aggressive type of advanced breast cancer. Epidermal growth factor receptor (EGFR) expression is an independent poor prognostic factor in IBC. The purpose of this study was to determine the effect on IBC tumorigenicity and metastasis of

Efficacy of HER2-targeted therapy in metastatic breast cancer. Monoclonal antibodies and tyrosine kinase inhibitors.

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Therapies targeting the human epidermal growth factor receptor (HER) 2 are effective in metastatic breast cancer (MBC). We review the efficacy of HER2-directed therapies, focussing on monoclonal antibodies and tyrosine kinase inhibitors targeting HER2 that have been tested in phase II-III studies in

Lapatinib: a dual tyrosine kinase inhibitor for metastatic breast cancer.

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OBJECTIVE The pharmacology, pharmacokinetics, clinical efficacy, adverse effects, drug and food interactions, dosage and administration, and role in therapy of lapatinib in metastatic breast cancer are reviewed. CONCLUSIONS Lapatinib is a small-molecule tyrosine kinase inhibitor that dually targets

Expression patterns of the novel receptor-like tyrosine kinase, DDR, in human breast tumours.

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Using a reverse transcriptase-polymerase chain reaction based differential screening procedure, we have identified the discoidin domain receptor as a protein tyrosine kinase that is expressed in lymph nodes containing breast tumour metastases. By Northern blotting and in situ hybridisation we have

Reduced annexin A6 expression promotes the degradation of activated epidermal growth factor receptor and sensitizes invasive breast cancer cells to EGFR-targeted tyrosine kinase inhibitors.

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BACKGROUND The expression of annexin A6 (AnxA6) in AnxA6-deficient non-invasive tumor cells has been shown to terminate epidermal growth factor receptor (EGFR) activation and downstream signaling. However, as a scaffolding protein, AnxA6 may stabilize activated cell-surface receptors to promote

New targets for therapy in breast cancer: small molecule tyrosine kinase inhibitors.

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Over the past several years many advances have been made in our understanding of critical pathways involved in carcinogenesis and tumor growth. These advances have led to the investigation of small molecule inhibitors of the ErbB family of receptor tyrosine kinases across a broad spectrum of

Phosphorylation of DARPP-32 regulates breast cancer cell migration downstream of the receptor tyrosine kinase DDR1.

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Cell migration plays a central role in processes such as development, wound healing and cancer metastasis. Here we describe a novel interaction between DDR1, a receptor tyrosine kinase activated by collagen, and the phosphoprotein DARPP-32 in mammary epithelial cells. DARPP-32 expression was readily

Frequent epigenetic inactivation of the receptor tyrosine kinase EphA5 by promoter methylation in human breast cancer.

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EphA5 is a member of the Eph receptor tyrosine kinase family, which plays a critical role in the regulation of carcinogenesis. Our previous DNA methylation microarray results suggested that the CpG islands in the EphA5 promoter exhibited higher methylation levels in breast cancer tissues. In this

Receptor tyrosine kinase EphB4 is a survival factor in breast cancer.

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EphB4, a member of the largest family of receptor tyrosine kinases, is normally expressed on endothelial and neuronal cells. Although aberrant expression of EphB4 has been reported in several human tumors, including breast cancer, its functional significance is not understood. We report here that

Tyrosine phosphorylation of the MUC1 breast cancer membrane proteins. Cytokine receptor-like molecules.

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Phosphorylation on tyrosine residues is a key step in signal transduction pathways mediated by membrane proteins. Although it is known that human breast cancer tissue expresses at least 2 MUC1 type 1 membrane proteins (a polymorphic high molecular weight MUC1 glycoprotein that contains a variable

HER-targeted tyrosine kinase inhibitors enhance response to trastuzumab and pertuzumab in HER2-positive breast cancer.

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Despite trastuzumab and pertuzumab improving outcome for patients with HER2-positive metastatic breast cancer, the disease remains fatal for the majority of patients. This study evaluated the anti-proliferative effects of adding anti-HER2 tyrosine kinase inhibitors (TKIs) to trastuzumab and

Expression of the HER1-4 family of receptor tyrosine kinases in breast cancer.

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EGFr/HER1 and c-erbB-2/HER2 expression are associated with poor prognosis in breast cancer. The type I receptor tyrosine kinase (RTK) family to which they belong has four members (HER1-4). In this study, expression of HER1-4 and oestrogen receptor (ER) expression were determined by

Small molecule tyrosine kinase inhibitors of ErbB2/HER2/Neu in the treatment of aggressive breast cancer.

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The human epidermal growth factor receptor 2 (HER2) is a member of the erbB class of tyrosine kinase receptors. These proteins are normally expressed at the surface of healthy cells and play critical roles in the signal transduction cascade in a myriad of biochemical pathways responsible for cell

Etk/Bmx tyrosine kinase activates Pak1 and regulates tumorigenicity of breast cancer cells.

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Etk/Bmx, a member of the Tec family of nonreceptor protein-tyrosine kinases, is characterized by an N-terminal pleckstrin homology domain and has been shown to be a downstream effector of phosphatidylinositol 3-kinase. P21-activated kinase 1 (Pak1), another well characterized effector of

Tyrosine kinase inhibitors as modulators of trastuzumab-mediated antibody-dependent cell-mediated cytotoxicity in breast cancer cell lines.

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BACKGROUND Trastuzumab is an anti-HER2 monoclonal antibody (mAb) therapy capable of antibody-dependent cell-mediated cytotoxicity (ADCC) and used in the treatment of HER2+ breast cancer. Through interactions with FcƴR+ immune cell subsets, trastuzumab functions as a passive immunotherapy. The

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