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  1. Article ; Online: High-grade serous ovarian carcinoma organoids as models of chromosomal instability.

    Vias, Maria / Morrill Gavarró, Lena / Sauer, Carolin M / Sanders, Deborah A / Piskorz, Anna M / Couturier, Dominique-Laurent / Ballereau, Stéphane / Hernando, Bárbara / Schneider, Michael P / Hall, James / Correia-Martins, Filipe / Markowetz, Florian / Macintyre, Geoff / Brenton, James D

    eLife

    2023  Volume 12

    Abstract: High-grade serous ovarian carcinoma (HGSOC) is the most genomically complex cancer, characterized by ... ...

    Abstract High-grade serous ovarian carcinoma (HGSOC) is the most genomically complex cancer, characterized by ubiquitous
    MeSH term(s) Humans ; Female ; Ovarian Neoplasms/genetics ; Ovarian Neoplasms/pathology ; Mutation ; Genomics ; Chromosomal Instability ; Organoids
    Language English
    Publishing date 2023-05-11
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2687154-3
    ISSN 2050-084X ; 2050-084X
    ISSN (online) 2050-084X
    ISSN 2050-084X
    DOI 10.7554/eLife.83867
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Omentum-derived matrix enables the study of metastatic ovarian cancer and stromal cell functions in a physiologically relevant environment.

    Neilson, Lisa J / Cartwright, Douglas / Risteli, Maija / Jokinen, Elina M / McGarry, Lynn / Sandvik, Toni / Nikolatou, Konstantina / Hodge, Kelly / Atkinson, Samuel / Vias, Maria / Kay, Emily J / Brenton, James D / Carlin, Leo M / Bryant, David M / Salo, Tuula / Zanivan, Sara

    Matrix biology plus

    2023  Volume 19-20, Page(s) 100136

    Abstract: High-grade serous (HGS) ovarian cancer is the most lethal gynaecological disease in the world and metastases is a major cause. The omentum is the preferential metastatic site in HGS ovarian cancer patients ... ...

    Abstract High-grade serous (HGS) ovarian cancer is the most lethal gynaecological disease in the world and metastases is a major cause. The omentum is the preferential metastatic site in HGS ovarian cancer patients and
    Language English
    Publishing date 2023-11-22
    Publishing country Netherlands
    Document type Journal Article
    ISSN 2590-0285
    ISSN (online) 2590-0285
    DOI 10.1016/j.mbplus.2023.100136
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Positional influence on cellular transcriptional identity revealed through spatially segmented single-cell transcriptomics.

    Morse, David B / Michalowski, Aleksandra M / Ceribelli, Michele / De Jonghe, Joachim / Vias, Maria / Riley, Deanna / Davies-Hill, Theresa / Voss, Ty / Pittaluga, Stefania / Muus, Christoph / Liu, Jiamin / Boyle, Samantha / Weitz, David A / Brenton, James D / Buenrostro, Jason D / Knowles, Tuomas P J / Thomas, Craig J

    Cell systems

    2023  Volume 14, Issue 6, Page(s) 464–481.e7

    Abstract: Single-cell RNA sequencing (scRNA-seq) is a powerful technique for describing cell states. Identifying the spatial arrangement of these states in tissues remains challenging, with the existing methods requiring niche methodologies and expertise. Here, we ...

    Abstract Single-cell RNA sequencing (scRNA-seq) is a powerful technique for describing cell states. Identifying the spatial arrangement of these states in tissues remains challenging, with the existing methods requiring niche methodologies and expertise. Here, we describe segmentation by exogenous perfusion (SEEP), a rapid and integrated method to link surface proximity and environment accessibility to transcriptional identity within three-dimensional (3D) disease models. The method utilizes the steady-state diffusion kinetics of a fluorescent dye to establish a gradient along the radial axis of disease models. Classification of sample layers based on dye accessibility enables dissociated and sorted cells to be characterized by transcriptomic and regional identities. Using SEEP, we analyze spheroid, organoid, and in vivo tumor models of high-grade serous ovarian cancer (HGSOC). The results validate long-standing beliefs about the relationship between cell state and position while revealing new concepts regarding how spatially unique microenvironments influence the identity of individual cells within tumors.
    MeSH term(s) Transcriptome/genetics ; Gene Expression Profiling ; Kinetics ; Organoids ; Physics
    Language English
    Publishing date 2023-06-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2854138-8
    ISSN 2405-4720 ; 2405-4712
    ISSN (online) 2405-4720
    ISSN 2405-4712
    DOI 10.1016/j.cels.2023.05.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Longitudinal monitoring of disease burden and response using ctDNA from dried blood spots in xenograft models.

    Sauer, Carolin M / Heider, Katrin / Belic, Jelena / Boyle, Samantha E / Hall, James A / Couturier, Dominique-Laurent / An, Angela / Vijayaraghavan, Aadhitthya / Reinius, Marika Av / Hosking, Karen / Vias, Maria / Rosenfeld, Nitzan / Brenton, James D

    EMBO molecular medicine

    2022  Volume 14, Issue 8, Page(s) e15729

    Abstract: Whole-genome sequencing (WGS) of circulating tumour DNA (ctDNA) is now a clinically important biomarker for predicting therapy response, disease burden and disease progression. However, the translation of ctDNA monitoring into vital preclinical PDX ... ...

    Abstract Whole-genome sequencing (WGS) of circulating tumour DNA (ctDNA) is now a clinically important biomarker for predicting therapy response, disease burden and disease progression. However, the translation of ctDNA monitoring into vital preclinical PDX models has not been possible owing to low circulating blood volumes in small rodents. Here, we describe the longitudinal detection and monitoring of ctDNA from minute volumes of blood in PDX mice. We developed a xenograft Tumour Fraction (xTF) metric using shallow WGS of dried blood spots (DBS), and demonstrate its application to quantify disease burden, monitor treatment response and predict disease outcome in a preclinical study of PDX mice. Further, we show how our DBS-based ctDNA assay can be used to detect gene-specific copy number changes and examine the copy number landscape over time. Use of sequential DBS ctDNA assays could transform future trial designs in both mice and patients by enabling increased sampling and molecular monitoring.
    MeSH term(s) Animals ; Biomarkers, Tumor ; Circulating Tumor DNA/genetics ; Cost of Illness ; Heterografts ; Mice ; Neoplasms/genetics ; Neoplasms/therapy
    Chemical Substances Biomarkers, Tumor ; Circulating Tumor DNA
    Language English
    Publishing date 2022-06-13
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2467145-9
    ISSN 1757-4684 ; 1757-4676
    ISSN (online) 1757-4684
    ISSN 1757-4676
    DOI 10.15252/emmm.202215729
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Molecular landscape and functional characterization of centrosome amplification in ovarian cancer.

    Sauer, Carolin M / Hall, James A / Couturier, Dominique-Laurent / Bradley, Thomas / Piskorz, Anna M / Griffiths, Jacob / Sawle, Ashley / Eldridge, Matthew D / Smith, Philip / Hosking, Karen / Reinius, Marika A V / Morrill Gavarró, Lena / Mes-Masson, Anne-Marie / Ennis, Darren / Millan, David / Hoyle, Aoisha / McNeish, Iain A / Jimenez-Linan, Mercedes / Martins, Filipe Correia /
    Tischer, Julia / Vias, Maria / Brenton, James D

    Nature communications

    2023  Volume 14, Issue 1, Page(s) 6505

    Abstract: High-grade serous ovarian carcinoma (HGSOC) is characterised by poor outcome and extreme chromosome instability (CIN). Therapies targeting centrosome amplification (CA), a key mediator of chromosome missegregation, may have significant clinical utility ... ...

    Abstract High-grade serous ovarian carcinoma (HGSOC) is characterised by poor outcome and extreme chromosome instability (CIN). Therapies targeting centrosome amplification (CA), a key mediator of chromosome missegregation, may have significant clinical utility in HGSOC. However, the prevalence of CA in HGSOC, its relationship to genomic biomarkers of CIN and its potential impact on therapeutic response have not been defined. Using high-throughput multi-regional microscopy on 287 clinical HGSOC tissues and 73 cell lines models, here we show that CA through centriole overduplication is a highly recurrent and heterogeneous feature of HGSOC and strongly associated with CIN and genome subclonality. Cell-based studies showed that high-prevalence CA is phenocopied in ovarian cancer cell lines, and that high CA is associated with increased multi-treatment resistance; most notably to paclitaxel, the commonest treatment used in HGSOC. CA in HGSOC may therefore present a potential driver of tumour evolution and a powerful biomarker for response to standard-of-care treatment.
    MeSH term(s) Humans ; Female ; Ovarian Neoplasms/pathology ; Paclitaxel/pharmacology ; Paclitaxel/therapeutic use ; Centrosome/metabolism ; Cystadenocarcinoma, Serous/genetics
    Chemical Substances Paclitaxel (P88XT4IS4D)
    Language English
    Publishing date 2023-10-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-41840-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Terminal and progenitor lineage-survival oncogenes as cancer markers.

    Vias, Maria / Ramos-Montoya, Antonio / Mills, Ian G

    Trends in molecular medicine

    2008  Volume 14, Issue 11, Page(s) 486–494

    Abstract: Tumour classification has traditionally focused on differentiation and cellular morphology, and latterly on the application of genomic approaches. By combining chromatin immunoprecipitation with expression array, it has been possible to identify direct ... ...

    Abstract Tumour classification has traditionally focused on differentiation and cellular morphology, and latterly on the application of genomic approaches. By combining chromatin immunoprecipitation with expression array, it has been possible to identify direct gene targets for transcription factors for nuclear hormone receptors. At the same time, there have been great strides in deriving stem and progenitor cells from tissues. It is therefore timely to propose that pairing the isolation of these cell subpopulations from tissues and tumours with these genomics approaches will reveal conserved gene targets for transcription factors. By focusing on transcription factors (lineage-survival oncogenes) with roles in both organogenesis and tumourigenesis at multiple organ sites, we suggest that this comparative genomics approach will enable developmental biology to be used more fully in relation to understanding tumour progression and will reveal new cancer markers. We focus here on neurogenesis and neuroendocrine differentiation in tumours.
    MeSH term(s) Animals ; Biomarkers, Tumor/metabolism ; Cell Lineage ; Chromatin Immunoprecipitation ; Female ; Gene Expression Regulation, Neoplastic ; Humans ; Male ; Neoplasms/metabolism ; Neoplasms/physiopathology ; Neoplasms/therapy ; Oligonucleotide Array Sequence Analysis ; Oncogenes ; Signal Transduction ; Stem Cells/cytology ; Stem Cells/metabolism
    Chemical Substances Biomarkers, Tumor
    Language English
    Publishing date 2008-10-15
    Publishing country England
    Document type Clinical Trial ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2036490-8
    ISSN 1471-499X ; 1471-4914
    ISSN (online) 1471-499X
    ISSN 1471-4914
    DOI 10.1016/j.molmed.2008.09.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Clonal somatic copy number altered driver events inform drug sensitivity in high-grade serous ovarian cancer.

    Martins, Filipe Correia / Couturier, Dominique-Laurent / de Santiago, Ines / Sauer, Carolin Margarethe / Vias, Maria / Angelova, Mihaela / Sanders, Deborah / Piskorz, Anna / Hall, James / Hosking, Karen / Amirthanayagam, Anumithra / Cosulich, Sabina / Carnevalli, Larissa / Davies, Barry / Watkins, Thomas B K / Funingana, Ionut G / Bolton, Helen / Haldar, Krishnayan / Latimer, John /
    Baldwin, Peter / Crawford, Robin / Eldridge, Matthew / Basu, Bristi / Jimenez-Linan, Mercedes / Mcpherson, Andrew W / McGranahan, Nicholas / Litchfield, Kevin / Shah, Sohrab P / McNeish, Iain / Caldas, Carlos / Evan, Gerard / Swanton, Charles / Brenton, James D

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 6360

    Abstract: Chromosomal instability is a major challenge to patient stratification and targeted drug development for high-grade serous ovarian carcinoma (HGSOC). Here we show that somatic copy number alterations (SCNAs) in frequently amplified HGSOC cancer genes ... ...

    Abstract Chromosomal instability is a major challenge to patient stratification and targeted drug development for high-grade serous ovarian carcinoma (HGSOC). Here we show that somatic copy number alterations (SCNAs) in frequently amplified HGSOC cancer genes significantly correlate with gene expression and methylation status. We identify five prevalent clonal driver SCNAs (chromosomal amplifications encompassing MYC, PIK3CA, CCNE1, KRAS and TERT) from multi-regional HGSOC data and reason that their strong selection should prioritise them as key biomarkers for targeted therapies. We use primary HGSOC spheroid models to test interactions between in vitro targeted therapy and SCNAs. MYC chromosomal copy number is associated with in-vitro and clinical response to paclitaxel and in-vitro response to mTORC1/2 inhibition. Activation of the mTOR survival pathway in the context of MYC-amplified HGSOC is statistically associated with increased prevalence of SCNAs in genes from the PI3K pathway. Co-occurrence of amplifications in MYC and genes from the PI3K pathway is independently observed in squamous lung cancer and triple negative breast cancer. In this work, we show that identifying co-occurrence of clonal driver SCNA genes could be used to tailor therapeutics for precision medicine.
    MeSH term(s) Humans ; Female ; Ovarian Neoplasms/drug therapy ; Ovarian Neoplasms/genetics ; Ovarian Neoplasms/pathology ; DNA Copy Number Variations ; Phosphatidylinositol 3-Kinases/genetics ; Phosphatidylinositol 3-Kinases/metabolism ; Proto-Oncogene Proteins p21(ras)/genetics ; Cystadenocarcinoma, Serous/drug therapy ; Cystadenocarcinoma, Serous/genetics ; Cystadenocarcinoma, Serous/metabolism ; Class I Phosphatidylinositol 3-Kinases/genetics ; Class I Phosphatidylinositol 3-Kinases/metabolism ; Paclitaxel/therapeutic use ; TOR Serine-Threonine Kinases/genetics ; TOR Serine-Threonine Kinases/metabolism ; Mechanistic Target of Rapamycin Complex 1/metabolism
    Chemical Substances Phosphatidylinositol 3-Kinases (EC 2.7.1.-) ; Proto-Oncogene Proteins p21(ras) (EC 3.6.5.2) ; Class I Phosphatidylinositol 3-Kinases (EC 2.7.1.137) ; Paclitaxel (P88XT4IS4D) ; TOR Serine-Threonine Kinases (EC 2.7.11.1) ; Mechanistic Target of Rapamycin Complex 1 (EC 2.7.11.1)
    Language English
    Publishing date 2022-10-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-33870-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: A role for neurotensin in bicalutamide resistant prostate cancer cells.

    Vias, Maria / Burtt, Glyn / Culig, Zoran / Veerakumarasivam, Abhi / Neal, David E / Mills, Ian G

    The Prostate

    2006  Volume 67, Issue 2, Page(s) 190–202

    Abstract: Background: Anti-androgens are administered as a principal treatment for prostate cancer. Aggressive hormone refractory disease is characterized in some cases by the development of a neuroendocrine phenotype. However little attention has been paid to ... ...

    Abstract Background: Anti-androgens are administered as a principal treatment for prostate cancer. Aggressive hormone refractory disease is characterized in some cases by the development of a neuroendocrine phenotype. However little attention has been paid to resistance pathways selected for by long-term treatment with non-steroidal anti-androgens.
    Methods: Using a resistant sub-line, LNCaP-Bic, we performed a comparative gene expression profiling using cDNA microarrays and target validation by qRT-PCR. Targets were then explored using cell proliferation, cell cycle analysis and in vitro invasion assays using siRNA technology.
    Results: Neurotensin/Neuromedin N (NTS) was upregulated in the LNCaP-Bic line at both the transcript and protein level. The resistant line was found to have an increased proliferation rate, more rapid cell cycle progression and increased invasiveness through Matrigel. Each phenotypic difference could be reduced using siRNA knockdown of NT.
    Conclusion: Increased expression of NT in bicalutamide resistant prostate cancer cells induces cell proliferation and invasion suggesting that this peptide may contribute to the development of bicalutamide resistant prostate cancer.
    MeSH term(s) Androgen Antagonists/pharmacology ; Anilides/pharmacology ; Cell Cycle ; Cell Line, Tumor ; Cell Movement ; Cell Proliferation ; Drug Resistance, Neoplasm ; Gene Expression Profiling ; Humans ; Male ; Microsatellite Repeats ; Neurotensin/genetics ; Neurotensin/metabolism ; Nitriles ; Oligonucleotide Array Sequence Analysis ; Prostatic Neoplasms/genetics ; Prostatic Neoplasms/metabolism ; Prostatic Neoplasms/pathology ; RNA, Small Interfering/pharmacology ; Reverse Transcriptase Polymerase Chain Reaction ; Tosyl Compounds ; Up-Regulation
    Chemical Substances Androgen Antagonists ; Anilides ; Nitriles ; RNA, Small Interfering ; Tosyl Compounds ; Neurotensin (39379-15-2) ; bicalutamide (A0Z3NAU9DP)
    Language English
    Publishing date 2006-10-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604707-5
    ISSN 1097-0045 ; 0270-4137
    ISSN (online) 1097-0045
    ISSN 0270-4137
    DOI 10.1002/pros.20518
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Microarray segmentation methods significantly influence data precision.

    Ahmed, Ahmed Ashour / Vias, Maria / Iyer, N Gopalakrishna / Caldas, Carlos / Brenton, James D

    Nucleic acids research

    2004  Volume 32, Issue 5, Page(s) e50

    Abstract: Little consideration has been given to the effect of different segmentation methods on the variability of data derived from microarray images. Previous work has suggested that the significant source of variability from microarray image analysis is from ... ...

    Abstract Little consideration has been given to the effect of different segmentation methods on the variability of data derived from microarray images. Previous work has suggested that the significant source of variability from microarray image analysis is from estimation of local background. In this study, we used Analysis of Variance (ANOVA) models to investigate the effect of methods of segmentation on the precision of measurements obtained from replicate microarray experiments. We used four different methods of spot segmentation (adaptive, fixed circle, histogram and GenePix) to analyse a total number of 156 172 spots from 12 microarray experiments. Using a two-way ANOVA model and the coefficient of repeatability, we show that the method of segmentation significantly affects the precision of the microarray data. The histogram method gave the lowest variability across replicate spots compared to other methods, and had the lowest pixel-to-pixel variability within spots. This effect on precision was independent of background subtraction. We show that these findings have direct, practical implications as the variability in precision between the four methods resulted in different numbers of genes being identified as differentially expressed. Segmentation method is an important source of variability in microarray data that directly affects precision and the identification of differentially expressed genes.
    MeSH term(s) Algorithms ; Analysis of Variance ; Cell Line ; DNA, Complementary ; Fluorescent Dyes ; Gene Expression Profiling/methods ; Humans ; Oligonucleotide Array Sequence Analysis/methods ; Reproducibility of Results
    Chemical Substances DNA, Complementary ; Fluorescent Dyes
    Language English
    Publishing date 2004-03-17
    Publishing country England
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2205588-5
    ISSN 1362-4962 ; 1746-8272 ; 0305-1048 ; 0261-3166
    ISSN (online) 1362-4962 ; 1746-8272
    ISSN 0305-1048 ; 0261-3166
    DOI 10.1093/nar/gnh047
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Pro-neural transcription factors as cancer markers.

    Vias, Maria / Massie, Charlie E / East, Philip / Scott, Helen / Warren, Anne / Zhou, Zongxiang / Nikitin, Alexander Yu / Neal, David E / Mills, Ian G

    BMC medical genomics

    2008  Volume 1, Page(s) 17

    Abstract: Background: The aberrant transcription in cancer of genes normally associated with embryonic tissue differentiation at various organ sites may be a hallmark of tumour progression. For example, neuroendocrine differentiation is found more commonly in ... ...

    Abstract Background: The aberrant transcription in cancer of genes normally associated with embryonic tissue differentiation at various organ sites may be a hallmark of tumour progression. For example, neuroendocrine differentiation is found more commonly in cancers destined to progress, including prostate and lung. We sought to identify proteins which are involved in neuroendocrine differentiation and differentially expressed in aggressive/metastatic tumours.
    Results: Expression arrays were used to identify up-regulated transcripts in a neuroendocrine (NE) transgenic mouse model of prostate cancer. Amongst these were several genes normally expressed in neural tissues, including the pro-neural transcription factors Ascl1 and Hes6. Using quantitative RT-PCR and immuno-histochemistry we showed that these same genes were highly expressed in castrate resistant, metastatic LNCaP cell-lines. Finally we performed a meta-analysis on expression array datasets from human clinical material. The expression of these pro-neural transcripts effectively segregates metastatic from localised prostate cancer and benign tissue as well as sub-clustering a variety of other human cancers.
    Conclusion: By focussing on transcription factors known to drive normal tissue development and comparing expression signatures for normal and malignant mouse tissues we have identified two transcription factors, Ascl1 and Hes6, which appear effective markers for an aggressive phenotype in all prostate models and tissues examined. We suggest that the aberrant initiation of differentiation programs may confer a selective advantage on cells in all contexts and this approach to identify biomarkers therefore has the potential to uncover proteins equally applicable to pre-clinical and clinical cancer biology.
    Language English
    Publishing date 2008-05-19
    Publishing country England
    Document type Journal Article
    ISSN 1755-8794
    ISSN (online) 1755-8794
    DOI 10.1186/1755-8794-1-17
    Database MEDical Literature Analysis and Retrieval System OnLINE

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