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  1. Article: Women's contribution in understanding how topoisomerases, supercoiling, and transcription control genome organization.

    Martin, Laura / Neguembor, Maria Victoria / Cosma, Maria Pia

    Frontiers in molecular biosciences

    2023  Volume 10, Page(s) 1155825

    Abstract: One of the biggest paradoxes in biology is that human genome is roughly 2 m long, while the nucleus containing it is almost one million times smaller. To fit into the nucleus, DNA twists, bends and folds into several hierarchical levels of compaction. ... ...

    Abstract One of the biggest paradoxes in biology is that human genome is roughly 2 m long, while the nucleus containing it is almost one million times smaller. To fit into the nucleus, DNA twists, bends and folds into several hierarchical levels of compaction. Still, DNA has to maintain a high degree of accessibility to be readily replicated and transcribed by proteins. How compaction and accessibility co-exist functionally in human cells is still a matter of debate. Here, we discuss how the torsional stress of the DNA helix acts as a buffer, regulating both chromatin compaction and accessibility. We will focus on chromatin supercoiling and on the emerging role of topoisomerases as pivotal regulators of genome organization. We will mainly highlight the major breakthrough studies led by women, with the intention of celebrating the work of this group that remains a minority within the scientific community.
    Language English
    Publishing date 2023-03-27
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2814330-9
    ISSN 2296-889X
    ISSN 2296-889X
    DOI 10.3389/fmolb.2023.1155825
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Women’s contribution in understanding how topoisomerases, supercoiling, and transcription control genome organization

    Laura Martin / Maria Victoria Neguembor / Maria Pia Cosma

    Frontiers in Molecular Biosciences, Vol

    2023  Volume 10

    Abstract: One of the biggest paradoxes in biology is that human genome is roughly 2 m long, while the nucleus containing it is almost one million times smaller. To fit into the nucleus, DNA twists, bends and folds into several hierarchical levels of compaction. ... ...

    Abstract One of the biggest paradoxes in biology is that human genome is roughly 2 m long, while the nucleus containing it is almost one million times smaller. To fit into the nucleus, DNA twists, bends and folds into several hierarchical levels of compaction. Still, DNA has to maintain a high degree of accessibility to be readily replicated and transcribed by proteins. How compaction and accessibility co-exist functionally in human cells is still a matter of debate. Here, we discuss how the torsional stress of the DNA helix acts as a buffer, regulating both chromatin compaction and accessibility. We will focus on chromatin supercoiling and on the emerging role of topoisomerases as pivotal regulators of genome organization. We will mainly highlight the major breakthrough studies led by women, with the intention of celebrating the work of this group that remains a minority within the scientific community.
    Keywords genome organization ; supercoiling ; topoisomerases ; transcription ; women ; Biology (General) ; QH301-705.5
    Subject code 612
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: STORM Microscopy and Cluster Analysis for PcG Studies.

    Martin, Laura / Castells-Garcia, Alvaro / Cosma, Maria Pia / Neguembor, Maria Victoria

    Methods in molecular biology (Clifton, N.J.)

    2023  Volume 2655, Page(s) 171–181

    Abstract: Advanced microscopy techniques (such as STORM, STED, and SIM) have recently allowed the visualization of biological samples beyond the diffraction limit of light. Thanks to this breakthrough, the organization of molecules can be revealed within single ... ...

    Abstract Advanced microscopy techniques (such as STORM, STED, and SIM) have recently allowed the visualization of biological samples beyond the diffraction limit of light. Thanks to this breakthrough, the organization of molecules can be revealed within single cells as never before.Here, we describe the application of STochastic Optical Reconstruction Microscopy (STORM) for the study of polycomb group of proteins (PcG) in the context of chromatin organization. We present a clustering algorithm to quantitatively analyze the spatial distribution of nuclear molecules (e.g., EZH2 or its associated chromatin mark H3K27me3) imaged by 2D STORM. This distance-based analysis uses x-y coordinates of STORM localizations to group them into "clusters." Clusters are classified as singles if isolated or into islands if they form a group of closely associated clusters. For each cluster, the algorithm calculates the number of localizations, the area, and the distance to the closest cluster.This approach can be used for every type of adherent cell line and allows the imaging of every protein for which an antibody is available. It represents a comprehensive strategy to visualize and quantify how PcG proteins and related histone marks organize in the nucleus at nanometric resolution.
    MeSH term(s) Microscopy ; Chromatin/metabolism ; Polycomb-Group Proteins ; Cell Nucleus/metabolism ; Chromosomes
    Chemical Substances Chromatin ; Polycomb-Group Proteins
    Language English
    Publishing date 2023-05-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-3143-0_13
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Hospital-based home care for children with cancer during the COVID-19 pandemic in northeastern Italy.

    Massano, Davide / Cosma, Laura / Garolla, Martina / Sainati, Laura / Biffi, Alessandra

    Pediatric blood & cancer

    2020  Volume 67, Issue 12, Page(s) e28501

    MeSH term(s) Betacoronavirus ; COVID-19 ; Child ; Coronavirus Infections ; Home Care Services, Hospital-Based ; Humans ; Italy/epidemiology ; Neoplasms/epidemiology ; Neoplasms/therapy ; Pandemics ; Pneumonia, Viral/epidemiology ; SARS-CoV-2
    Keywords covid19
    Language English
    Publishing date 2020-09-02
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 2131448-2
    ISSN 1545-5017 ; 1545-5009
    ISSN (online) 1545-5017
    ISSN 1545-5009
    DOI 10.1002/pbc.28501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Unexpected Detection of Abscessualized Lung Carcinoma on Tc-99m-HMPAO-labeled Leukocytes Scintigraphy Misdiagnosed on Chest Computed Tomography.

    Cosma, Laura / Frantellizzi, Viviana / Pontico, Mariano / De Vincentis, Giuseppe

    Molecular imaging and radionuclide therapy

    2021  Volume 30, Issue 1, Page(s) 60–62

    Abstract: Technetium-99m (Tc-99m)-hexamethylpropylene amine oxime (HMPAO)-labeled leukocytes scintigraphy is well established for investigating and diagnosing infections in bone and soft tissue, as well as for the detection of occult infection. A 71-year-old ... ...

    Abstract Technetium-99m (Tc-99m)-hexamethylpropylene amine oxime (HMPAO)-labeled leukocytes scintigraphy is well established for investigating and diagnosing infections in bone and soft tissue, as well as for the detection of occult infection. A 71-year-old female who was recently diagnosed with bronchopulmonary neuroendocrine tumor of the right lung was referred for an intermittent fever of unknown origin associated with chill at night for the last month. Chest computed tomography (CT) scan showed a thrombotic widespread of the superior vena cava and a solid pathological tissue in the superior segment of the inferior lobe of the right lung with consensual atelectasis. Being a carrier of port-a-cath, an infection of this device was suspected. Therefore, Tc-99m-HMPAO-labeled leukocytes single-photon emission computed tomography (SPECT) was performed, and matching pairs of CT scan and Tc-99m-HMPAO-labeled white blood cell SPECT images were fused. Through this means, it was found that the area of the radiotracer increased uptake corresponded with the soft tissue density mass detected by CT scan localized at the inferior lobe of the right lung. The hybrid SPECT/CT fused imaging was crucial for diagnosis of the presence of a lung abscess localized in correspondence with the known lung cancer region.
    Language English
    Publishing date 2021-02-15
    Publishing country Turkey
    Document type Journal Article
    ISSN 2146-1414
    ISSN 2146-1414
    DOI 10.4274/mirt.galenos.2020.54366
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Early

    Cosma, Laura / Sollaku, Saadi / Frantellizzi, Viviana / De Vincentis, Giuseppe

    Journal of medical imaging and radiation oncology

    2020  Volume 64, Issue 5, Page(s) 671–673

    Abstract: We report the case of who has been hospitalized complaining about fever in the last 4 days. Laboratory data revealed lymphocytopenia and leucopenia with an elevation of C-reactive protein and positive real-time reverse transcription-polymerase chain ... ...

    Abstract We report the case of who has been hospitalized complaining about fever in the last 4 days. Laboratory data revealed lymphocytopenia and leucopenia with an elevation of C-reactive protein and positive real-time reverse transcription-polymerase chain reaction (RT-PCR). Six days before this hospitalization, when the patient was asymptomatic,
    MeSH term(s) Betacoronavirus ; COVID-19 ; Colorectal Neoplasms/pathology ; Coronavirus Infections/diagnostic imaging ; Disease Progression ; Fluorodeoxyglucose F18 ; Humans ; Incidental Findings ; Liver Neoplasms/secondary ; Lung Diseases/diagnostic imaging ; Lung Diseases/virology ; Pandemics ; Pneumonia, Viral/diagnostic imaging ; Positron Emission Tomography Computed Tomography ; Radiopharmaceuticals ; SARS-CoV-2
    Chemical Substances Radiopharmaceuticals ; Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Keywords covid19
    Language English
    Publishing date 2020-09-17
    Publishing country Australia
    Document type Case Reports ; Journal Article
    ZDB-ID 2389687-5
    ISSN 1754-9485 ; 1440-1673 ; 1754-9477 ; 0004-8461
    ISSN (online) 1754-9485 ; 1440-1673
    ISSN 1754-9477 ; 0004-8461
    DOI 10.1111/1754-9485.13099
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Immunohistochemical evaluation of biomarkers with predictive role in acromegaly: a literature review.

    Gliga, Maximilian Cosma / Tătăranu, Ligia Gabriela / Popescu, Mihaela / Chinezu, Laura / Paşcanu, Maria Ionela

    Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie

    2023  Volume 64, Issue 1, Page(s) 25–33

    Abstract: Acromegaly is a rare endocrine disorder, which despite the recent advances in diagnosis and management, remains a significant burden in terms of morbidity and mortality for patients because of the frequent aggressive evolution and lack of response to ... ...

    Abstract Acromegaly is a rare endocrine disorder, which despite the recent advances in diagnosis and management, remains a significant burden in terms of morbidity and mortality for patients because of the frequent aggressive evolution and lack of response to available first-line pharmacological therapy. A switch from the classical "trial and error" management to a personalized therapy approach has been proposed through early identification of biomarkers that could predict treatment response and biological behavior. Several such molecular markers have been extensively studied through immunohistochemistry (IHC), among them the somatostatin receptors type 2 (SSTR-2) and type 5 (SSTR-5), which are known to correlate with response to somatostatin analogues treatment, the SSTR-2 negative tumors usually being resistant to first-generation analogues, while SSTR-5 potentially being a predictive marker for the novel agent, Pasireotide. Based on cytokeratin (CK) immunostaining pattern, somatotropinomas have been classified into densely granulated adenomas (DGAs), which present a milder evolution and favorable outcomes after therapy, and sparsely granulated adenomas (SGAs), known to be more aggressive and frequently resistant to first-line treatment options. Other novel markers, such as the E-cadherin cell-adhesion protein, the aryl hydrocarbon receptor-interacting protein (AIP), the cytoskeleton molecule filamin A (FLNA) and the Ki-67 nuclear antigen have also been the highlight of IHC studies on growth hormone (GH)-producing tumors, with promising results regarding their predictive roles for the outcome of acromegalic patients. In this review, we aimed to summarize the current knowledge on the role of IHC for acromegaly, highlighting the most important biomarkers that could offer valuable information for predicting treatment response, biological behavior, and prognosis.
    MeSH term(s) Humans ; Acromegaly ; Adenoma/pathology ; Pituitary Neoplasms ; Biomarkers ; Intracellular Signaling Peptides and Proteins/therapeutic use
    Chemical Substances Biomarkers ; Intracellular Signaling Peptides and Proteins
    Language English
    Publishing date 2023-04-27
    Publishing country Romania
    Document type Review ; Journal Article
    ZDB-ID 1062519-7
    ISSN 2066-8279 ; 1220-0522 ; 0035-4007
    ISSN (online) 2066-8279
    ISSN 1220-0522 ; 0035-4007
    DOI 10.47162/RJME.64.1.03
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: 111In-Octreoscan SPECT/CT hybrid imaging and 68Ga-DOTANOC PET/CT in neuroendocrine adenoma of the middle ear (NAME).

    Pontico, Mariano / Frantellizzi, Viviana / Cosma, Laura / De Vincentis, Giuseppe

    The Indian journal of radiology & imaging

    2020  Volume 30, Issue 3, Page(s) 400–404

    Abstract: Neuroendocrine adenoma of the middle ear (NAME) represents a rare tumour consisting of an adenoma with mixed neuroendocrine differentiation. A 40-year-old woman was referred to our attention to further investigate the occurrence of a pathological tissue ... ...

    Abstract Neuroendocrine adenoma of the middle ear (NAME) represents a rare tumour consisting of an adenoma with mixed neuroendocrine differentiation. A 40-year-old woman was referred to our attention to further investigate the occurrence of a pathological tissue located in the mastoid process of the left temporal bone depicted by head CT and MRI scans. Histopathological examination revealed an epithelial neoplasm with neuroendocrine differentiation features, consistent with the diagnosis of NAME. In order to obtain an accurate differential diagnosis and confirmation of this rare disease, 111In-Octreoscan single photon emission computed tomography (SPECT)/CT and 68Ga-DOTANOC positron emission tomography (PET)/CT were performed, both showing overexpression of somatostatin receptors and thus corroborating the histopathological findings.
    Language English
    Publishing date 2020-10-15
    Publishing country India
    Document type Case Reports
    ZDB-ID 605869-3
    ISSN 0971-3026 ; 0970-2016
    ISSN 0971-3026 ; 0970-2016
    DOI 10.4103/ijri.IJRI_125_20
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Hospital-based home care for children with cancer during the COVID-19 pandemic in northeastern Italy

    Massano, Davide / Cosma, Laura / Garolla, Martina / Sainati, Laura / Biffi, Alessandra

    Pediatr Blood Cancer

    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #743694
    Database COVID19

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  10. Article ; Online: A protocol to quantify chromatin compaction with confocal and super-resolution microscopy in cultured cells.

    Martin, Laura / Vicario, Chiara / Castells-García, Álvaro / Lakadamyali, Melike / Neguembor, Maria Victoria / Cosma, Maria Pia

    STAR protocols

    2021  Volume 2, Issue 4, Page(s) 100865

    Abstract: Here, we describe three complementary microscopy-based approaches to quantify morphological changes of chromatin organization in cultured adherent cells: the analysis of the coefficient of variation of DNA, the measurement of DNA-free nuclear areas, and ... ...

    Abstract Here, we describe three complementary microscopy-based approaches to quantify morphological changes of chromatin organization in cultured adherent cells: the analysis of the coefficient of variation of DNA, the measurement of DNA-free nuclear areas, and the quantification of chromatin-associated proteins at the nuclear edge. These approaches rely on confocal imaging and stochastic optical reconstruction microscopy and allow a fast and robust quantification of chromatin compaction. These approaches circumvent inter-variability between imaging conditions and apply to every type of adherent cells. For complete details on the use and execution of this protocol, please refer to Neguembor et al. (2021).
    MeSH term(s) Cell Culture Techniques ; Cell Nucleus/chemistry ; Cells, Cultured ; Chromatin/chemistry ; HeLa Cells ; Humans ; Image Processing, Computer-Assisted/methods ; Microscopy, Confocal/methods
    Chemical Substances Chromatin
    Language English
    Publishing date 2021-09-30
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2666-1667
    ISSN (online) 2666-1667
    DOI 10.1016/j.xpro.2021.100865
    Database MEDical Literature Analysis and Retrieval System OnLINE

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