M Herlyn

..Qualitative and quantitative changes in matricellular protein expression contribute to melanoma progression similar to the E-cadherin to N-cadherin class switch, allowing melanoma cells to escape from keratinocyte control...

..This group provides recommendations for both short- and long-term strategies that build on research strengths and opportunities established by the many members of the research community...

..However, major challenges lie ahead in securing funding, building infrastructure and gaining expertise in new technologies. To meet these challenges, multidisciplinary collaborations will be required all the more...

..Here we present the biological basis for the use of organotypic, three-dimensional model systems in the study of melanoma, and highlight the features of the most utilized organotypic model systems...

..Melanomas as a group are heterogeneous as are tumor cells within one lesion. New strategies will move towards individualized therapies and combination therapies to target all cells within a tumor...

..This is the first report suggesting that an imbalance of physiological growth factor production in the skin may cause melanoma in combination with UVB...

..Whereas major matricellular proteins, such as osteopontin, tenascin or secreted protein acidic and rich in cysteine (SPARC), are strongly upregulated in melanoma cells; CCN3 is the first member of this family that is downregulated...

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..These results suggest the multifunctional role of a melanoma-associated cell-cell adhesion receptor in tumor progression...

..Even highly aggressive metastatic melanoma cells can be signalled to turn off the expression of genes associated with tumour invasion and metastasis, suggesting that this strategy could be utilized in the therapy of melanoma...

..Cyclin D1 expression increases in frequency with disease progression, and antisense cyclin D1 was effective in a xenograft model of human cancer, independent of tumor growth rate...

..In summary, we have identified a group of melanomas with low-activity BRAF mutations that are reliant upon CRAF-mediated survival activity...

..This correlates with the degree of monocytic cell infiltration, which results in increased tumor vascularization and TNF-alpha production...

..These data suggest that remodeling of the neighboring stroma, which provides a supporting scaffolding and a positive feedback stimulation of tumor growth, is an important function of TGF-beta1 in melanoma...

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..Here, we demonstrate that there is a poor correlation between pERK inhibition and the anti-proliferative effects of MEK inhibitors in melanoma cells. We suggest that Ki67 is a better biomarker for future clinical studies...

..Taken together, these results provide evidence for a low-turnover, mesenchymal-like sub-population in SCCs with diminished EGFR pathway function and intrinsic resistance to conventional and EGFR-targeted chemotherapies...

..Advances in these fields will lead to the development of better tools for prevention, diagnosis, and therapy...

..In addition, PTP-RF/LAR was downregulated in 13 of 22 metastatic melanomas. CONCLUSIONS: The expression of multiple PTP receptors is decreased in melanoma; this may be a mechanism which stimulates autonomous growth in advanced melanoma...

..Thus, abnormal expression of intercellular adhesion receptors and dysregulated intercellular communication underlies melanoma development and progression...

..Although the process results in some loss of input RNA, this purification procedure is simple, robust and can easily be adopted in any laboratory for the molecular analysis of RNA that requires removal of melanin contamination...

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..Our data show regulation of MAPK/PI3K-Akt pathway activities and expression of N-cadherin by the Notch pathway and provide a mechanistic basis for Notch signaling in the promotion of primary melanoma progression...

..The genetic loci that make up this profile may harbor therapeutic targets specific for tumors with BRAF mutations...

..These data suggest that TNC is critical in melanoma progression as it mediates protective signals in the therapy-resistant population of melanoma...

..In this review, principles and different methods of skin reconstruction are introduced with focus on the application for pigment cell biology...

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..Taken together, these data suggest that FGF-BP expression in squamous epithelium does not play an important role in progression to invasive carcinoma...

..Hence, the genes and proteins that control apoptosis provide exciting new targets for rationally designed anti-melanoma therapeutic strategies...

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..Thus pathways for angiogenesis and vasculogenesis are guided through the cooperation of fibroblasts and melanoma cells perpetuated by the dominance of the metastatic melanoma cells...

..The identification of melanoma-initiating cells has far-reaching implications, as new therapeutic strategies can be envisioned that specifically target these cells...

..We also demonstrate a critical role for claudin-7 expression in the regulation of E-cadherin in these cells, suggesting this may be one mechanism for the loss of epithelial architecture and invasion observed in esophageal SCC...

..These data link AKT activation with MelCAM expression, and implicate that intervention of MelCAM-AKT signaling axis in melanoma is a potential therapeutical approach...

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..The results indicate that E-cadherin-mediated cell adhesion is required for keratinocyte-mediated control of melanocytic cells, which can override proliferative activity of beta-catenin...

..These WT1-specific MAbs should be useful in characterizing the biochemical and developmental roles of WT1 and in defining the emerging role of WT1 as a diagnostic and/or prognostic marker in mesothelioma, leukemias, and breast cancer...

..The recent years have seen great advances in understanding the biology of melanoma. In the current review we discuss the most promising molecular targets for melanoma and suggest possible strategies for overcoming resistance...

..A similar stromal response was induced when alpha5 and alpha2 integrin subunits were overexpressed in the human dermis, suggesting that integrins play a major role in the induction of a transformed phenotype of fibroblasts by PDGF-B...

..The field has to better bridge experimental with clinical research and increase communication. Corroboration with advocacy groups should activate the public for increased awareness and funding...

..In this issue, Prada et al. (2007) begin to answer this question by demonstrating that SPARC produced by melanoma, but not stromal cells, is essential to regulate melanoma cell growth...

..More recent thinking posits that, although cancers are initiated through genetic mutation, progression is often the result of dynamic interactions between the tumor cells and their surrounding environment...

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..This new information yields valuable insight into the basic epidemiology of melanoma and launches a realm of possibilities for drug intervention in this deadly disease...

..We therefore suggest that p38 MAPK pathway activation is an excellent potential therapeutic strategy in ESCC. It is further suggested that bortezomib could be added to existing ESCC therapeutic regimens...

..It is further suggested that BRAF mutational status is not predictive of response to MEK inhibition under three-dimensional culture conditions...

..It is likely that the adoption of these and other 3D models will allow us to more closely re-create the behavior of the tumor in vivo which may lead to identifying better anticancer drug candidates at an earlier stage of development...

..These promising model systems and their potential for closing current gaps in knowledge of disease are reviewed. The development of such models holds translational value that cannot be achieved with most current systems...

..Taken together, our data provide a new strategy for the pharmacologic activation of p53 in melanoma, which may be a viable approach for overcoming apoptotic resistance in melanoma and offer new hope for rational melanoma therapy...

..It also discusses the influence of the microenvironment on therapeutic targeting of melanoma, highlighting recent studies that propose novel strategies to target tumor-microenvironment interactions...

..Ongoing studies are dissecting and characterizing the hierarchy of these subpopulations within a malignant lesion. Understanding these and the dynamics of clonal dominance will aid in the development of novel therapeutic strategies...

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..Our results, which suggest that E-cadherin regulates TbetaRII function, have important implications for epithelial carcinogenesis characterized through the frequent occurrence of E-cadherin and TbetaRII loss...

..An understanding of this process and developing new experimental and screening models are of great importance for the development of effective therapeutical strategies to treat melanoma...

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..Based on these findings, we propose that melanomas can contain a subpopulation of stem cells that contribute to heterogeneity and tumorigenesis. Targeting this population may lead to effective treatments for melanomas...

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..Metastatic melanomas proliferate in vivo independently of infiltrating neutrophils...

..Magnetic resonance imaging detects not only iron retaining melanoma cells but also iron positive macrophages. Proposed method opens up opportunities to image subpopulation of melanoma cells, which is critical for continuous tumor growth...

..Taken together, these data support a model in which mutational activation of BRAF in human melanomas contributes to constitutive induction of NF-kappaB activity and to increased survival of melanoma cells...

..020CMV.PDGF-b associated with in vivo platelet-derived growth factor-BB gene transduction via an intraulcer injection of H5.020CMV.PDGF-b in patients with a diabetic insensate foot ulcer...

..In contrast, infection with adenovirus 5 recruited BRCA1 to regions of viral transcription and replication. These disparate distributions of BRCA1 may provide clues to its function...

..This group of melanomas may be a subpopulation for which imatinib or other KIT inhibitors may constitute optimal therapy...

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..The impact of this event is dramatic on several levels; avoidance of apoptosis not only prevents programmed cell death in an array of cell types but also promotes chemotherapeutic resistance during anticancer regimens...

..Esophageal squamous cell carcinoma (ESCC) is known to be a highly angiogenic tumor. Here, we investigated the role of the stromal fibroblasts in the ESCC-induced angiogenic response using a novel 3-dimensional model...

..This study addresses the anti-melanoma activity of the MEK inhibitor AZD6244 (ARRY-142886)...

..The results suggest that the autocrine and paracrine functions of Epo might play a role in malignant transformation of melanocytes and in the survival of melanoma cells in hypoxia and other adverse conditions...

..Inhibiting beta-catenin expression reversed Notch1-enhanced tumor growth and metastasis. Our data therefore suggest a beta-catenin-dependent, stage-specific role for Notch1 signaling in promoting the progression of primary melanoma...

..These results demonstrate an intricate and necessary communication between keratinocytes and melanocytes in maintaining normal epidermal homeostasis...

..Importantly, human cancers harboring mutations in Fbx4, the cyclin D1 E3 ligase, exhibit nuclear cyclin D1 accumulation and increased PRMT5 activity...

..These results suggest a new understanding of melanoma heterogeneity with tumor maintenance as a dynamic process mediated by a temporarily distinct subpopulation...

..In organotypic culture, AKT mediates changes related to cell shape and size with an expansion of the differentiated compartment...

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..Although interleukin 8 (IL-8) is not produced in the normal cornea, it has been detected there in several pathological conditions. In this study, the direct effects of IL-8 overexpression on the cornea was examined...

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..These data suggest that melanoma growth, invasion, and metastasis are attributable to constitutively activated ERK apparently mediated by excessive growth factors through autocrine mechanisms and BRAF kinase activation...

..Defining intercellular molecular dialogues in human skin promises to provide key information for the development of novel treatment strategies that target the functional unit of stroma and tumor...

..This study provides the first evidence for regulation of Notch/Delta gene expression by an angiogenic growth factor and insight into the critical role of Notch signaling in arteriogenesis and angiogenesis...

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..The data suggest that melanocytes from young individuals are more susceptible to the transforming effects of genotoxic agents than melanocytes from adults...

..In summary, combining the separately effective treatment vectors p53 and AS CD1 led to an enhanced growth-suppressive and apoptotic effect, supporting a role for combination gene therapy to treat human malignant melanoma...

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..These studies therefore provide a basis for understanding the regenerative capacity and biology of the esophageal epithelium when it is faced with injurious insults...

..We discuss the implications of this result for combination therapy with BAY 43-9006 and IFNalpha in melanoma patients...

..In summary, we have shown for the first time the differentiation of hESCs into melanocytes. This method provides a novel in vitro system for studying the development biology of human melanocytes...

..We will review the Notch signaling literature as it relates to skin homeostasis, melanocytic stem cells and melanoma tumorigenesis...

..This is the first report on human cancer initiation in vivo in which an imbalance of physiological factors combined with an environmental carcinogen can lead to transformation of normal tissue...

..In the current review, we discuss the role for these signaling pathways in melanoma and discuss the rationale for targeting signaling cascades using small molecule inhibitors...

..Thus, when present, BRAF(V599E) appears to be essential for melanoma cell viability and transformation and, therefore, represents an attractive therapeutic target in the majority of melanomas that harbor the mutation...

..This would assist multiple laboratories to participate in the input and retrieval of target spectral information...

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..Our findings suggest that aberrant splicing of Bin1 may contribute to melanoma progression, and they define a mechanism by which the activity of a tumor suppressor can be eliminated in cells...

..These defects were found to occur in cells isolated from early melanomas, lending support to the hypothesis that IFN-alpha has a role in the aetiology of malignant melanoma...

..The results of the research to date indicate that in melanoma both the MAPK and the AKT signaling pathways may represent promising therapeutic targets...

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..This second congress will strengthen the field and solidify the ties between the different research and clinical communities. ..

..These studies should lead to a better understanding of the tumor-specific signatures in pathways associated with invasion and metastasis. ..

..These studies will demonstrate how dysregulation of homeostasis results in tumor formation and targeting subpopulations of malignant cells leads to successful therapy. ..

..Our unique model allows a systematic dissection of the biological and molecular events leading to human melanoma formation. ..

..CTCL is addressed in one Project and one Pilot Study, and SCC in one Pilot Study. This endeavor represents the synergistic integration of well-established individual research programs towards our collective goals. ..

..These studies will demonstrate how dysregulation of homeostasis results in tumor formation and targeting subpopulations of malignant cells leads to successful therapy. ..

..This proposal addresses the biological significance of inter-cellular signaling during distinct steps of melanoma tumor progression. ..

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..Our unique in vitro/in vivo models are suitable to investigate etiology, early detection, and prevention of human melanoma. ..

..As additional signaling pathways are being defined, therapeutic strategies that would mimic the regulatory control of keratinocytes over E-cadherin-expressing melanoma cell will be developed as a long-term objective. ..

..These studies will demonstrate how dysregulation of homeostasis results in tumor formation and targeting subpopulations of malignant cells leads to successful therapy. ..