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  1. Book ; Online: MOTO

    Rafailov, Rafael / Hatch, Kyle / Kolev, Victor / Martin, John D. / Phielipp, Mariano / Finn, Chelsea

    Offline Pre-training to Online Fine-tuning for Model-based Robot Learning

    2024  

    Abstract: We study the problem of offline pre-training and online fine-tuning for reinforcement learning from high-dimensional observations in the context of realistic robot tasks. Recent offline model-free approaches successfully use online fine-tuning to either ... ...

    Abstract We study the problem of offline pre-training and online fine-tuning for reinforcement learning from high-dimensional observations in the context of realistic robot tasks. Recent offline model-free approaches successfully use online fine-tuning to either improve the performance of the agent over the data collection policy or adapt to novel tasks. At the same time, model-based RL algorithms have achieved significant progress in sample efficiency and the complexity of the tasks they can solve, yet remain under-utilized in the fine-tuning setting. In this work, we argue that existing model-based offline RL methods are not suitable for offline-to-online fine-tuning in high-dimensional domains due to issues with distribution shifts, off-dynamics data, and non-stationary rewards. We propose an on-policy model-based method that can efficiently reuse prior data through model-based value expansion and policy regularization, while preventing model exploitation by controlling epistemic uncertainty. We find that our approach successfully solves tasks from the MetaWorld benchmark, as well as the Franka Kitchen robot manipulation environment completely from images. To the best of our knowledge, MOTO is the first method to solve this environment from pixels.

    Comment: This is an updated version of a manuscript that originally appeared at CoRL 2023. The project website is here https://sites.google.com/view/mo2o
    Keywords Computer Science - Machine Learning ; Computer Science - Artificial Intelligence ; Computer Science - Robotics
    Subject code 004
    Publishing date 2024-01-06
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: With complements: C3 inhibition in the clinic

    Kolev, Martin / Barbour, Tara / Baver, Scott / Francois, Cedric / Deschatelets, Pascal

    Immunological Reviews 2023 Jan., v. 313, no. 1, p. 358-375

    2023  , Page(s) 358–375

    Abstract: C3 is a key complement protein, located at the nexus of all complement activation pathways. Extracellular, tissue, cell‐derived, and intracellular C3 plays critical roles in the immune response that is dysregulated in many diseases, making it an ... ...

    Abstract C3 is a key complement protein, located at the nexus of all complement activation pathways. Extracellular, tissue, cell‐derived, and intracellular C3 plays critical roles in the immune response that is dysregulated in many diseases, making it an attractive therapeutic target. However, challenges such as very high concentration in blood, increased acute expression, and the elevated risk of infections have historically posed significant challenges in the development of C3‐targeted therapeutics. This is further complicated because C3 activation fragments and their receptors trigger a complex network of downstream effects; therefore, a clear understanding of these is needed to provide context for a better understanding of the mechanism of action (MoA) of C3 inhibitors, such as pegcetacoplan. Because of C3's differential upstream position to C5 in the complement cascade, there are mechanistic differences between pegcetacoplan and eculizumab that determine their efficacy in patients with paroxysmal nocturnal hemoglobinuria. In this review, we compare the MoA of pegcetacoplan and eculizumab in paroxysmal nocturnal hemoglobinuria and discuss the complement‐mediated disease that might be amenable to C3 inhibition. We further discuss the current state and outlook for C3‐targeted therapeutics and provide our perspective on which diseases might be the next success stories in the C3 therapeutics journey.
    Keywords blood ; complement ; hemoglobinuria ; immune response ; mechanism of action ; risk ; therapeutics
    Language English
    Dates of publication 2023-01
    Size p. 358-375.
    Publishing place John Wiley & Sons, Inc
    Document type Article ; Online
    Note REVIEW
    DOI 10.1111/imr.13138
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Brain-based treatment-A new approach or a well-forgotten old one?

    Matanova, Vanya / Kostova, Zlatomira / Kolev, Martin

    Journal of evaluation in clinical practice

    2018  Volume 24, Issue 4, Page(s) 859–863

    Abstract: For a relatively long period of time, mental functioning was mainly associated with personal profile while brain functioning went by the wayside. After the 90s of the 20th century, or the so called "Decade of the Brain", today, contemporary specialists ... ...

    Abstract For a relatively long period of time, mental functioning was mainly associated with personal profile while brain functioning went by the wayside. After the 90s of the 20th century, or the so called "Decade of the Brain", today, contemporary specialists work on the boundary between fundamental science and medicine. This brings neuroscience, neuropsychology, psychiatry, and psychotherapy closer to each other. Today, we definitely know that brain structures are being built and altered thanks to experience. Psychotherapy can be more effective when based on a neuropsychological approach-this implies identification of the neural foundations of various disorders and will lead to specific psychotherapeutic conclusions. The knowledge about the brain is continually enriched, which leads to periodic rethinking and updating of the therapeutic approaches to various diseases of the nervous system and brain dysfunctions. The aim of translational studies is to match and combine scientific areas, resources, experience and techniques to improve prevention, diagnosis and therapies, and "transformation" of scientific discoveries into potential treatments of various diseases done in laboratory conditions. Neuropsychological studies prove that cognition is a key element that links together brain functioning and behaviour. According to Dr. Kandel, all experimental events, including psychotherapeutic interventions, affect the structure and function of neuronal synapses. The story of why psychotherapy works is a story of understanding the brain mechanisms of psychic processes, a story of how the brain has been evolving to ensure learning, forgetting, and the mechanisms of permanent psychological change. The new evidence on brain functioning necessitates the integration of neuropsychological achievements in the psychotherapeutic process. An integrative approach is needed to take into account the dynamic interaction between brain functioning, psyche, soul, spirit, and social interaction, ie, development of a model of psychotherapeutic work based on cerebral plasticity! Brain-based psychotherapy aims at changing brain functioning not directly, but through experiences. This is neuro-psychologically informed psychotherapy.
    MeSH term(s) Brain/physiopathology ; Cognitive Neuroscience/methods ; Cognitive Neuroscience/trends ; Evaluation Studies as Topic ; Humans ; Mental Processes/physiology ; Neuropsychiatry/methods ; Neuropsychiatry/trends ; Neuropsychology/methods ; Neuropsychology/trends ; Psychotherapeutic Processes ; Psychotherapy/methods
    Language English
    Publishing date 2018-04-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 1327355-3
    ISSN 1365-2753 ; 1356-1294
    ISSN (online) 1365-2753
    ISSN 1356-1294
    DOI 10.1111/jep.12915
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Online: Makroökonomische Effekte einer paritätischen Beitragsfinanzierung

    Beznoska, Martin / Kolev, Galina V / Pimpertz, Jochen

    eine Analyse aktueller Reformvorschläge für die Gesetzliche Kranken- und die soziale Pflegeversicherung

    (IW policy paper ; 2017, 15)

    2017  

    Abstract: Im Vorfeld der Bundestagswahl wird unter anderem eine Rückkehr zur vollständig paritätischen Beitragsfinanzierung der Gesetzlichen Krankenversicherung gefordert. Der bislang allein von den Mitgliedern zu zahlende Zusatzbeitrag würde damit abgeschafft und ...

    Author's details Autoren: Martin Beznoska, Galina Kolev, Jochen Pimpertz
    Series title IW policy paper ; 2017, 15
    Abstract Im Vorfeld der Bundestagswahl wird unter anderem eine Rückkehr zur vollständig paritätischen Beitragsfinanzierung der Gesetzlichen Krankenversicherung gefordert. Der bislang allein von den Mitgliedern zu zahlende Zusatzbeitrag würde damit abgeschafft und je zur Hälfte auf den bisherigen Beitragssatzanteil der Arbeitnehmer und Arbeitgeber aufgeschlagen. Allerdings entpuppt sich die damit verbundene Hoffnung auf eine nachhaltige Entlastung der Beitragszahler als Irrweg. Denn letztlich müssen die Arbeitnehmer sämtliche Arbeitskosten, also auch die Arbeitgeberbeiträge zur Sozialversicherung, mit ihrer Leistung erwirtschaften, damit ihre Beschäftigung nachhaltig gesichert ist. Die hälftige Teilung des bisherigen Zusatzbeitrags belastet die Arbeitgeber in der ersten Runde um 6 Milliarden Euro pro Jahr zusätzlich. Für die Ruheständler muss die Gesetzliche Rentenversicherung einen um 1,4 Milliarden Euro höheren Beitragszuschuss zahlen. Im Gegenzug werden die privaten Haushalte der Arbeitnehmer und Rentenbezieher um 7,4 Milliarden Euro entlastet. Dennoch eignet sich die Maßnahme nicht als sozialpolitisches Instrument. Denn die Verteilung der Nettoeinkommen der sozialversicherungspflichtig Beschäftigten lässt sich damit kaum verändern. Sowohl der Gini-Koeffizient als auch die Relation der Nettoeinkommen zwischen oberem und unterem Zehntel (90/10-Verhältnis) sinken lediglich um 0,2 Prozent. Dafür drohen aber Anpassungsreaktionen, die die Gesellschaft teuer zu stehen kämen. Denn die Unternehmen werden versuchen, die höheren Arbeitskosten bereits kurzfristig über steigende Güterpreise auszugleichen. Damit verschlechtert sich aber deren Wettbewerbsfähigkeit. In der Folge wachsen die Exporte langsamer und mittelbar leidet auch die Beschäftigung. Eine Simulation mithilfe des Global Economic Model von Oxford Economics zeigt, dass zehn Jahre nach der Abschaffung des Zusatzbeitrags das Bruttoinlandsprodukt um 0,4 Prozent niedriger ausfallen würde als unter dem heutigen Beitragsrecht - in Preisen des Jahres 2010 gerechnet minus 13 Milliarden Euro. Die Erwerbslosenquote läge um 0,8 Prozentpunkte über dem Szenario ohne Reform.

    One of the topics debated in the run-up to the Bundestag election refers to a return to full parity contribution of statutory health insurance. The supplementary contribution paid up to now by the employees and retirees insured should be abolished and re-placed by a contribution on a parity basis by the employees and their employers. The present analysis shows that the associated hopes for a sustained relief of the contributors are not justified, since the employers have to compensate the additional costs associated with this reform. With the split of the previous supplementary contribution, employers would be burdened by 6 billion euros per year in the first round. The statutory pension insurance would also have to pay a pension subsidy worth 1.4 billion euros for retirees. In return, the private budgets of workers and pensioners are relieved by 7.4 billion euros. However, the distribution of the net social security contributions among the employees could hardly be offset. Both the Gini coefficient and the ratio of net income between the upper and lower tenths (90/10 ratio) fall by only 0.2 per cent. In the medium and long term, however, there are threats of adjustment which would make the reform expensive. A simulation using the Oxford Economic Model shows that the gross domestic product would be 0.4 per cent lower ten years after the abolition of the supplementary contribution - at 2010 prices a minus of 13 billion euros. The unemployment rate would be 0.8 percentage points higher. Even if at the same time the threshold for contributions would be raised to the level of statutory pension insurance, the distribution effects remained small. The Gini coefficient drops by almost one per cent in the first round, while the 90/10 ratio drops by 2 per cent. The macroeconomic effects weigh heavily. Although the asymmetric distribution of the higher labor costs in the Oxford Economic Model cannot be replicated, model simulations assuming equal distribution of the labor costs show that the gross domestic product would be 0.9 per cent lower after ten years - at 2010 prices it would be 29 billion euros less than with the additional contribution. The unemployment rate would be by 1.8 percentage points higher.
    Keywords Einkommensverteilung ; makroökonomische Modelle ; Gesundheitspolitik
    Language German
    Size 1 Online-Ressource (circa 21 Seiten), Illustrationen
    Publisher Institut der Deutschen Wirtschaft Köln
    Publishing place Köln
    Document type Book ; Online
    Note Zusammenfassung in englischer Sprache
    Database ECONomics Information System

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  5. Article ; Online: Asparaginyl Endopeptidase (Legumain) Supports Human Th1 Induction via Cathepsin L-Mediated Intracellular C3 Activation.

    Freeley, Simon / Cardone, John / Günther, Sira C / West, Erin E / Reinheckel, Thomas / Watts, Colin / Kemper, Claudia / Kolev, Martin V

    Frontiers in immunology

    2018  Volume 9, Page(s) 2449

    Abstract: Autocrine activation of the complement receptors C3aR and CD46 by complement activation components C3a and C3b produced through C3 cleavage by the protease cathepsin L (CTSL) during T cell stimulation is a requirement for IFN-γ production and Th1 ... ...

    Abstract Autocrine activation of the complement receptors C3aR and CD46 by complement activation components C3a and C3b produced through C3 cleavage by the protease cathepsin L (CTSL) during T cell stimulation is a requirement for IFN-γ production and Th1 induction in human CD4
    MeSH term(s) Animals ; Cathepsin L/metabolism ; Cell Proliferation ; Complement C3a/immunology ; Complement C3b/immunology ; Cysteine Endopeptidases/genetics ; Cysteine Endopeptidases/metabolism ; Humans ; Interferon-gamma/biosynthesis ; Interferon-gamma/metabolism ; Lymphocyte Activation/genetics ; Lymphocyte Activation/immunology ; Membrane Cofactor Protein/metabolism ; Mice ; Mice, Knockout ; Receptors, Complement/metabolism ; Th1 Cells/immunology ; Thymalfasin/metabolism
    Chemical Substances IFNG protein, human ; IFNG protein, mouse ; Mcp protein, mouse ; Membrane Cofactor Protein ; Receptors, Complement ; complement C3a receptor ; Complement C3a (80295-42-7) ; Complement C3b (80295-43-8) ; Interferon-gamma (82115-62-6) ; Cysteine Endopeptidases (EC 3.4.22.-) ; Cathepsin L (EC 3.4.22.15) ; asparaginylendopeptidase (EC 3.4.22.34) ; Thymalfasin (W0B22ISQ1C)
    Language English
    Publishing date 2018-10-24
    Publishing country Switzerland
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2018.02449
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book ; Online: Gewaltiger Einbruch und nur allmähliche Erholung

    Bardt, Hubertus / Beznoska, Martin / Demary, Markus / Grömling, Michael / Hüther, Michael / Kolev, Galina V. / Matthes, Jürgen / Pimpertz, Jochen / Schäfer, Holger

    IW-Konjunkturprognose Frühsommer 2020

    2020  

    Abstract: Die Corona-Pandemie trifft die Welt mit multiplen Angebots- und Nachfrageschocks zugleich. Das gab es in dieser Breite, Heftigkeit und Schnelligkeit noch nie. Eine schnelle Rückkehr auf die vorherigen Wachstumsspuren ist in allen Weltregionen nicht zu ... ...

    Abstract Die Corona-Pandemie trifft die Welt mit multiplen Angebots- und Nachfrageschocks zugleich. Das gab es in dieser Breite, Heftigkeit und Schnelligkeit noch nie. Eine schnelle Rückkehr auf die vorherigen Wachstumsspuren ist in allen Weltregionen nicht zu erwarten. Im Jahr 2020 wird die globale Wirtschaftsleistung um über 4 Prozent unter dem Vorjahresniveau liegen. Dies markiert den stärksten Einbruch in der Nachkriegszeit. Das Vorkrisenniveau dürfte erst gegen Ende des Jahres 2021 erreicht werden. Dies setzt voraus, dass es zu keiner zweiten Welle der Virusaus-breitung und einem 'second lockdown' kommt. Das globale Wirtschaftswachstum im Jahr 2021 dürfte dann in der Größenordnung von etwa 6 Prozent liegen. Der Einbruch der weltweiten Wirtschaftsaktivitäten hat gravierende Folgen für die Dynamik des Welthandels. Dieser bricht 2020 um 9 Prozent ein. 2021 ist ein Plus beim globalen Güteraustausch in Höhe von 8 Prozent zu erwarten. Die Erholung der deutschen Konjunktur wird sich nach den starken Beeinträchtigungen im zwei-ten Quartal 2020 auf weite Teile des kommenden Jahres erstrecken. Beim Export wirkt - trotz der sich wieder stabilisierenden Weltkonjunktur - die stark beeinträchtigte globale Investitions-tätigkeit hemmend. Beim Konsum deckeln zunächst fehlende Nachholmöglichkeiten, zum Teil sich nur allmählich auflösende Angebotsrestriktionen und Verunsicherungen die Dynamik. Mit der Festigung der konjunkturellen Erholung trägt der private Konsum mit seinem hohen Gewicht an der Inlandsnachfrage maßgeblich zum Aufschwung bei. Bei den Inlandsinvestitionen ist eine längere Erholungsphase zu erwarten. Eine entscheidende Rolle spielen dabei die Perspektiven für die Weltwirtschaft, denn das schwache globale Umfeld dämpft auch die Investitionsanreize in Deutschland. Anziehende Insolvenzzahlen können zusätzlich die Investitionen bremsen. Durch das Zusammenspiel dieser derzeit retardierenden Momente geht das reale Bruttoinlands-produkt in Deutschland im Jahr 2020 um 9 Prozent zurück. Unter der Annahme, dass es keinen ...
    Keywords ddc:330 ; E2 ; E3 ; E5 ; E6 ; Coronavirus ; Wirtschaftlicher Wiederaufbau ; Europäische Finanzpolitik ; EU-Staaten ; Europäischer Stabilitätsmechanismus ; Italien
    Subject code 331
    Language German
    Publisher Köln: Institut der deutschen Wirtschaft (IW)
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Retraction. Targeting neural-restrictive silencer factor sensitizes tumor cells to antibody-based cancer immunotherapy in vitro via multiple mechanisms.

    Kolev, Martin V / Morgan, B Paul / Ruseva, Marieta M / Donev, Rossen M

    Journal of immunology (Baltimore, Md. : 1950)

    2012  Volume 187, Issue 12, Page(s) 6581

    Language English
    Publishing date 2012-02-29
    Publishing country United States
    Document type Retraction of Publication
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.1190073
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Synchronization of fronto-parietal beta and theta networks as a signature of visual awareness in neglect.

    Yordanova, Juliana / Kolev, Vasil / Verleger, Rolf / Heide, Wolfgang / Grumbt, Michael / Schürmann, Martin

    NeuroImage

    2017  Volume 146, Page(s) 341–354

    Abstract: In the neglect syndrome, the perceptual deficit for contra-lesional hemi-space is increasingly viewed as a dysfunction of fronto-parietal cortical networks, the disruption of which has been described in neuroanatomical and hemodynamic studies. Here we ... ...

    Abstract In the neglect syndrome, the perceptual deficit for contra-lesional hemi-space is increasingly viewed as a dysfunction of fronto-parietal cortical networks, the disruption of which has been described in neuroanatomical and hemodynamic studies. Here we exploit the superior temporal resolution of electroencephalography (EEG) to study dynamic transient connectivity of fronto-parietal circuits at early stages of visual perception in neglect. As reflected by inter-regional phase synchronization in a full-field attention task, two functionally distinct fronto-parietal networks, in beta (15-25Hz) and theta (4-8Hz) frequency bands, were related to stimulus discrimination within the first 200 ms of visual processing. Neglect pathology was specifically associated with significant suppressions of both beta and theta networks engaging right parietal regions. These connectivity abnormalities occurred in a pattern that was distinctly different from what was observed in right-hemisphere lesion patients without neglect. Also, both beta and theta abnormalities contributed additively to visual awareness decrease, quantified in the Behavioural Inattention Test. These results provide evidence for the impairment of fast dynamic fronto-parietal interactions during early stages of visual processing in neglect pathology. Also, they reveal that different modes of fronto-parietal dysfunction contribute independently to deficits in visual awareness at the behavioural level.
    MeSH term(s) Aged ; Awareness/physiology ; Beta Rhythm ; Cortical Synchronization ; Electroencephalography ; Female ; Frontal Lobe/physiopathology ; Humans ; Male ; Middle Aged ; Neural Pathways/physiopathology ; Parietal Lobe/physiopathology ; Perceptual Disorders/physiopathology ; Theta Rhythm ; Visual Perception/physiology
    Language English
    Publishing date 2017--01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1147767-2
    ISSN 1095-9572 ; 1053-8119
    ISSN (online) 1095-9572
    ISSN 1053-8119
    DOI 10.1016/j.neuroimage.2016.11.013
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Targeting neural-restrictive silencer factor sensitizes tumor cells to antibody-based cancer immunotherapy in vitro via multiple mechanisms.

    Kolev, Martin V / Ruseva, Marieta M / Morgan, B Paul / Donev, Rossen M

    publication RETRACTED

    Journal of immunology (Baltimore, Md. : 1950)

    2010  Volume 184, Issue 11, Page(s) 6035–6042

    Abstract: Tumor cells escape clearance by complement by abundantly expressing CD59 and other membrane complement regulators. Recently, we designed a peptide derived from the neural-restrictive silencer factor (REST), REST68, which we showed to inhibit expression ... ...

    Abstract Tumor cells escape clearance by complement by abundantly expressing CD59 and other membrane complement regulators. Recently, we designed a peptide derived from the neural-restrictive silencer factor (REST), REST68, which we showed to inhibit expression of CD59 in tumors lacking the full-length REST and proposed a detailed model for regulation of CD59 expression via interplay between REST and nucleolin (NCL) transcription factors. In this paper, we study in detail the mechanisms for sensitization of malignant cells to Ab-based cancer immunotherapy by the REST68 peptide and the implications of the REST/NCL model for the design of treatment resulting in higher tumor susceptibility. REST68 inhibited CD59 expression in malignant cells expressing either truncated or full-length REST, but not in nonmalignant cells. However, activation of protein kinase C (PKC) in nonmalignant cells, a process that contributes to cellular transformation, phosphorylated NCL and enabled suppression of CD59 expression by the REST68. Combined treatment of different tumor types with REST68 and PKC inhibitor synergized to further suppress CD59 expression and reduce resistance to complement lysis. The combined treatment also increased susceptibility of tumors expressing either of the REST isoforms to PBMC-mediated killing, which, at least in part, accounted for the strong promotion of apoptosis by the REST68/PKC inhibitor. These data demonstrate that REST68 sensitizes tumors to Ab-based cancer immunotherapy via multiple mechanisms. Furthermore, the REST/NCL interplay model for regulation of expression of cd59 and other genes involved in cell survival enables the design of treatments for different tumor types to achieve more efficient tumor clearance.
    MeSH term(s) Antibodies, Monoclonal/pharmacology ; Antineoplastic Agents/pharmacology ; Apoptosis/physiology ; Blotting, Western ; CD59 Antigens/genetics ; CD59 Antigens/immunology ; CD59 Antigens/metabolism ; Cell Line, Tumor ; Cell Separation ; Cytotoxicity, Immunologic ; Flow Cytometry ; Gene Expression ; Humans ; Immunotherapy/methods ; In Vitro Techniques ; Neoplasms/genetics ; Neoplasms/immunology ; Neoplasms/therapy ; Phosphoproteins/genetics ; Phosphoproteins/immunology ; Phosphoproteins/metabolism ; RNA-Binding Proteins/genetics ; RNA-Binding Proteins/immunology ; RNA-Binding Proteins/metabolism ; Repressor Proteins/genetics ; Repressor Proteins/immunology ; Nucleolin
    Chemical Substances Antibodies, Monoclonal ; Antineoplastic Agents ; CD59 Antigens ; Phosphoproteins ; RE1-silencing transcription factor ; RNA-Binding Proteins ; Repressor Proteins
    Language English
    Publishing date 2010-04-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Retracted Publication
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.1000045
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Adult form of Langerhans cell histiocytosis with pulmonary and hepatic involvement mimicking malignancy in a patient with chronic hepatitis C infection.

    Moullet, Barbara / Kolev, Mirjam / Ebner, Lukas / Langer, Rupert / Gräni, Christoph / Obmann, Verena / Maurer, Martin / Semmo, Nasser / Christe, Andreas / Huber, Adrian Thomas

    Radiology case reports

    2020  Volume 16, Issue 2, Page(s) 327–333

    Abstract: Langerhans cell histiocytosis (LCH) is a myeloid neoplasm with inflammatory properties. There are few published reports of adult LCH with liver involvement, which is still poorly understood, but shows high morbidity and mortality. We report a case of a ... ...

    Abstract Langerhans cell histiocytosis (LCH) is a myeloid neoplasm with inflammatory properties. There are few published reports of adult LCH with liver involvement, which is still poorly understood, but shows high morbidity and mortality. We report a case of a 37-year-old woman suffering from hepatitis C showing a LCH affecting the lung as well as the liver. Consistent with histology, we found an early stage of a proliferative/granulomatous phase of hepatobiliary LCH, whereas pulmonary findings showed a nodular stage of adult pulmonary LCH. Although hepatocellular carcinoma is a common malignancy in patients suffering from hepatitis C, it is crucial to keep in mind differential diagnosis for newly appearing liver lesions.
    Language English
    Publishing date 2020-12-03
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2406300-9
    ISSN 1930-0433
    ISSN 1930-0433
    DOI 10.1016/j.radcr.2020.11.022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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