26 research outputs found

    Proteogenomic profiling of metastatic melanoma. From protein expression to patient stratification.

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    The Hidden Story of Heterogeneous B-raf V600E Mutation Quantitative Protein Expression in Metastatic Melanoma-Association with Clinical Outcome and Tumor Phenotypes

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    In comparison to other human cancer types, malignant melanoma exhibits the greatest amount of heterogeneity. After DNA-based detection of the BRAF V600E mutation in melanoma patients, targeted inhibitor treatment is the current recommendation. This approach, however, does not take the abundance of the therapeutic target, i.e., the B-raf V600E protein, into consideration. As shown by immunohistochemistry, the protein expression profiles of metastatic melanomas clearly reveal the existence of inter-and intra-tumor variability. Nevertheless, the technique is only semi-quantitative. To quantitate the mutant protein there is a fundamental need for more precise techniques that are aimed at defining the currently non-existent link between the levels of the target protein and subsequent drug efficacy. Using cutting-edge mass spectrometry combined with DNA and mRNA sequencing, the mutated B-raf protein within metastatic tumors was quantitated for the first time. B-raf V600E protein analysis revealed a subjacent layer of heterogeneity for mutation-positive metastatic melanomas. These were characterized into two distinct groups with different tumor morphologies, protein profiles and patient clinical outcomes. This study provides evidence that a higher level of expression in the mutated protein is associated with a more aggressive tumor progression. Our study design, comprised of surgical isolation of tumors, histopathological characterization, tissue biobanking, and protein analysis, may enable the eventual delineation of patient responders/non-responders and subsequent therapy for malignant melanoma

    The Human Melanoma Proteome Atlas鈥擟omplementing the melanoma transcriptome

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    The MM500 meta鈥恠tudy aims to establish a knowledge basis of the tumor proteome to serve as a complement to genome and transcriptome studies. Somatic mutations and their effect on the transcriptome have been extensively characterized in melanoma. However, the effects of these genetic changes on the proteomic landscape and the impact on cellular processes in melanoma remain poorly understood. In this study, the quantitative mass鈥恠pectrometry鈥恇ased proteomic analysis is interfaced with pathological tumor characterization, and associated with clinical data. The melanoma proteome landscape, obtained by the analysis of 505 well鈥恆nnotated melanoma tumor samples, is defined based on almost 16聽000 proteins, including mutated proteoforms of driver genes. More than 50 million MS/MS spectra were analyzed, resulting in approximately 13,6 million peptide spectrum matches (PSMs). Altogether 13聽176 protein鈥恈oding genes, represented by 366聽172 peptides, in addition to 52聽000 phosphorylation sites, and 4 400 acetylation sites were successfully annotated. This data covers 65% and 74% of the predicted and identified human proteome, respectively. A high degree of correlation (Pearson, up to 0.54) with the melanoma transcriptome of the TCGA repository, with an overlap of 12聽751 gene products, was found. Mapping of the expressed proteins with quantitation, spatiotemporal localization, mutations, splice isoforms, and PTM variants was proven not to be predicted by genome sequencing alone. The melanoma tumor molecular map was complemented by analysis of blood protein expression, including data on proteins regulated after immunotherapy. By adding these key proteomic pillars, the MM500 study expands the knowledge on melanoma disease

    Exploring the Complex and Multifaceted Interplay between Melanoma Cells and the Tumor Microenvironment

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    Malignant melanoma is a very aggressive skin cancer, characterized by a heterogeneous nature and high metastatic potential. The incidence of melanoma is continuously increasing worldwide, and it is one of the most common cancers in young adults. In the past twenty years, our understanding of melanoma biology has increased profoundly, and disease management for patients with disseminated disease has improved due to the emergence of immunotherapy and targeted therapy. However, a significant fraction of patients relapse or do not respond adequately to treatment. This can partly be explained by the complex signaling between the tumor and its microenvironment, giving rise to melanoma phenotypes with different patterns of disease progression. This review focuses on the key aspects and complex relationship between pathogenesis, genetic abnormalities, tumor microenvironment, cellular plasticity, and metabolic reprogramming in melanoma. By acquiring a deeper understanding of the multifaceted features of melanomagenesis, we can reach a point of more individualized and patient-centered disease management and reduced costs of ineffective treatments

    Bezkontaktowe metody wyznaczania przemieszcze艅 i deformacji 艣cian oporowych

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    Promotor: Edward Preweda, El偶bieta Jasi艅ska.Recenzent: Andrzej Kwinta, Bogdan Wolski.Niepublikowana praca doktorska.Tyt. z ekranu tyt.Praca doktorska. Akademia G贸rniczo-Hutnicza im. Stanis艂awa Staszica (Krak贸w). Wydzia艂 Geodezji G贸rniczej i In偶ynierii 艢rodowiska. Katedra Geodezji In偶ynieryjnej i Budownictwa, 2015.Zawiera bibliogr.Dost臋pna r贸wnie偶 w wersji drukowanej.Tryb dost臋pu: Internet.Znaczenie kontroli geometrii i wyznaczania przemieszcze艅 艣cian oporowych, zapobieganie osuwiskom, osuwiska w ustawodawstwie i projektach rz膮dowych, rodzaje 艣cian oporowych, oddzia艂ywania na 艣ciany oporowe, kategorie geotechniczne, monitorowanie 艣cian oporowych wed艂ug prawa i norm, awarie i zniszczenia 艣cian oporowych, wsp贸艂czesne techniki pomiar贸w dla potrzeb wyznaczania przemieszcze艅, pomiary kontrolne jako element monitoringu przemieszcze艅, klasyfikacja przemieszcze艅 metody ich wyznaczania, naziemne skanowanie laserowe, podstawy skanowania laserowego, wp艂yw intensywno艣ci odbicia i k膮ta padania wi膮zki dalmierczej, aspekty praktyczne pomiar贸w skanerowych, skanowanie w wyznaczaniu przemieszcze艅, naziemna interferometria radarowa, elementy technik radarowych, podstawy dzia艂ania systemu IBIS, charakterystyka sygna艂u i anten systemu IBIS, system IBIS w wyznaczaniu przemieszcze艅, pomiary 艣cian oporowych w literaturze, pomiar klasyczny 艣cian oporowych, obiekt testowy, opis obiektu, przebieg pomiaru, przemieszczenia punkt贸w mierzonych klasycznie, wyznaczenie przemieszcze艅 i obrot贸w blok贸w, sprawdzenie warunku bry艂y sztywnej, obiekt wdro偶eniowy, opis obiektu, przebieg pomiaru, pomiar i badanie sta艂o艣ci punkt贸w sieci, przemieszczenia punkt贸w mierzonych klasycznie, wyznaczenie przemieszcze艅 i obrot贸w blok贸w, sprawdzenie warunku bry艂y sztywnej, zastosowanie skanowania laserowego do pomiaru 艣cian oporowych, przebieg pomiaru, 艂膮czenie chmur punkt贸w, analiza dok艂adno艣ci naziemnego skanowania laserowego, por贸wnanie chmur punkt贸w, podstawy teoretyczne, dob贸r rozmiaru siatki grid, por贸wnanie chmur obiektu testowego, por贸wnanie chmur obiektu wdro偶eniowego, znaczenie g臋stego skanowania i zmiany koloru powierzchni, analiza tworzenia siatki TIN w programach Cyclone CloudCompare, przekroje przez obiekt, zastosowanie 艣redniej krocz膮cej, przekroje przez obiekt testowy, przekroje przez obiekt wdro偶eniowy, zastosowanie systemu IBIS-L do pomiaru 艣cian oporowych, dob贸r stanowiska obserwacyjnego, precyzyjne odtworzenie stanowiska radaru, wykonanie obserwacji radarowych, selekcja pikseli, analiza sk艂adowych obserwowanego przemieszczenia, wyznaczenie przemieszcze艅 艣ciany, ograniczenie liczby piksel

    Determination of energetic states of nasalgastric tube surface of after selected material aging processes

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    Celem pracy by艂a ocena wp艂ywu procesu starzenia zg艂臋bnika 偶o艂膮dkowego na w艂a艣ciwo艣ci powierzchni okre艣lona w oparciu o pomiary k膮t贸w zwil偶ania. Oznaczono poziom ch艂onno艣ci materia艂u pod wp艂ywem dzia艂ania 艣rodowiska wodnego (woda: 23潞C/24h oraz 100潞/h, 0,9% roztw贸r NaCl: 37潞C/48h, roztw贸r Nestle Health Science Isosource Energy: 37潞C/48h). Zidentyfikowano swobodn膮 energi臋 powierzchniow膮 oraz jej sk艂adowe wykorzystuj膮c dwa modele analityczne (Owensa-Wendta oraz van Ossa-Chauhury-Gooda). W rezultacie przyspieszonego starzenia ujawniono zmiany w艂a艣ciwo艣ci powierzchni zg艂臋bnika.The aim of this work was to assess the influence of the stomach tube aging process on surface properties determined based on measurements of contact angles. The level of absorbency of the material under the influence of the water environment was determined (water: 23潞C / 24h and 100潞 / h, 0.9% NaCl solution: 37潞C / 48h, Nestle Health Science Isosource Energy: 37潞C/48h). The surface free energy and its components were identified using two analytical models (Owens-Wendt and van Oss-Chauhury-Good). As a result of aging accelerated aging, changes in the surface properties of the stomach tubes were revealed
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