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  1. Article ; Online: Metastatic meningioma: a case series and systematic review.

    Himič, Vratko / Burman, Richard J / Fountain, Daniel M / Hofer, Monika / Livermore, Laurent J / Jeyaretna, D Sanjeeva

    Acta neurochirurgica

    2023  Volume 165, Issue 10, Page(s) 2873–2883

    Abstract: Background: Meningiomas are the most common primary intracranial tumor. While the majority of meningiomas are benign, rarely they can metastasize extracranially. There is a need for a more comprehensive review of these patients to improve our ... ...

    Abstract Background: Meningiomas are the most common primary intracranial tumor. While the majority of meningiomas are benign, rarely they can metastasize extracranially. There is a need for a more comprehensive review of these patients to improve our understanding of this rare phenomenon and its prevalence globally. Here we describe our institution's experience of patients presenting with metastatic meningiomas. We further perform a systematic review of the existing literature to explore common features of this rare manifestation of meningioma and review the efficacy of current treatments.
    Methods: We performed a retrospective clinical review of all adult patients with metastatic meningioma managed at our institution over the past 20 years, identifying 6 patients. We then performed a systematic review of cases of metastatic meningioma in the literature ranging from the years 1886 to 2022. A descriptive analysis was then conducted on the available data from 1979 onward, focusing on the grade and location of the primary tumor as well as the latency period to, and location of, the metastasis.
    Results: In total, we analyzed 155 cases. Fifty-four percent of patients initially presented with a primary meningioma located in the convexity. The most common site of metastasis was the lung. Risk factors associated with a shorter time to metastasis were male sex and a high initial grade of the tumor. Regarding treatment, the addition of chemotherapy was the most common adjunct to the standard management of surgery and radiotherapy. Despite an exhaustive review we were unable to identify effective treatments. The majority of published cases came from centers situated in high-income countries (84%) while only 16% came from lower- and middle-income countries.
    Conclusions: Metastatic meningiomas pose a pertinent, and likely underestimated, clinical challenge within modern neurosurgery. To optimize management, timely identification of these patients is important. More research is needed to explore the mechanisms underlying these tumors to better guide the development of effective screening and management protocols. However, screening of each meningioma patient is not feasible, and at the heart of this challenge is the inability to control the primary disease. Ultimately, a consensus is needed as to how to correctly screen for and manage these patients; genomic and epigenomic approaches could hold the answer to finding druggable targets.
    MeSH term(s) Adult ; Female ; Humans ; Male ; Brain Neoplasms ; Meningeal Neoplasms/diagnosis ; Meningeal Neoplasms/therapy ; Meningeal Neoplasms/epidemiology ; Meningioma/diagnosis ; Meningioma/therapy ; Meningioma/pathology ; Retrospective Studies ; Treatment Outcome
    Language English
    Publishing date 2023-07-26
    Publishing country Austria
    Document type Journal Article ; Systematic Review
    ZDB-ID 80010-7
    ISSN 0942-0940 ; 0001-6268
    ISSN (online) 0942-0940
    ISSN 0001-6268
    DOI 10.1007/s00701-023-05687-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The difficulties of identifying and treating Enterobacterales with OXA-48-like carbapenemases.

    Kidd, J M / Livermore, D M / Nicolau, D P

    Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

    2019  Volume 26, Issue 4, Page(s) 401–403

    MeSH term(s) Bacterial Proteins/metabolism ; Enterobacteriaceae/enzymology ; beta-Lactamases/metabolism
    Chemical Substances Bacterial Proteins ; beta-Lactamases (EC 3.5.2.6) ; carbapenemase (EC 3.5.2.6)
    Language English
    Publishing date 2019-12-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 1328418-6
    ISSN 1469-0691 ; 1470-9465 ; 1198-743X
    ISSN (online) 1469-0691
    ISSN 1470-9465 ; 1198-743X
    DOI 10.1016/j.cmi.2019.12.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Uranium isotope compositions of biogenic carbonates - Implications for U uptake in shells and the application of the paleo-ocean oxygenation proxy.

    Livermore, B D / Dahl, T W / Bizzarro, M / Connelly, J N

    Geochimica et cosmochimica acta

    2020  Volume 287, Page(s) 50–64

    Abstract: The application of U isotopes in carbonates as a paleo-ocean oxygenation proxy is based on the critical assumption that the calcareous shell-building organisms incorporate U into their shells without fractionation relative to the U isotopic composition ... ...

    Abstract The application of U isotopes in carbonates as a paleo-ocean oxygenation proxy is based on the critical assumption that the calcareous shell-building organisms incorporate U into their shells without fractionation relative to the U isotopic composition of ambient seawater. Recent studies claim a small, but resolvable, isotopic offset during abiotic and biogenic aragonite precipitation, whereas no isotope fractionation has been recorded during calcite precipitation. Although aragonite is meta-stable and not preserved over geological timescales (>1 Myr) and U precipitates during diagenesis, the U isotope composition of biogenic aragonite is important because aragonite precipitation is an important U sink to carbonate sediments. In contrast, low-magnesium calcite (LMC) is preserved over geological timescales and may provide a reliable fingerprint of ancient ocean chemistry. Therefore, a more general study is needed that compares U isotope compositions of primary marine biogenic carbonate precipitates. We report the U isotope compositions of 32 modern samples from geographically distinct localities in the Atlantic Ocean including corals (
    Language English
    Publishing date 2020-07-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 300305-x
    ISSN 0016-7037
    ISSN 0016-7037
    DOI 10.1016/j.gca.2020.07.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: A General Approach to Adjusting Genetic Studies for Assortative Mating.

    Bilghese, Marta / Manansala, Regina / Jaishankar, Dhruva / Jala, Jonathan / Benjamin, Daniel J / Kimball, Miles / Auer, Paul L / Livermore, Michael A / Turley, Patrick

    bioRxiv : the preprint server for biology

    2023  

    Abstract: The effects of assortative mating (AM) on estimates from genetic studies has been receiving increasing attention in recent years. We extend existing AM theory to more general models of sorting and conclude that correct theory-based AM adjustments require ...

    Abstract The effects of assortative mating (AM) on estimates from genetic studies has been receiving increasing attention in recent years. We extend existing AM theory to more general models of sorting and conclude that correct theory-based AM adjustments require knowledge of complicated, unknown historical sorting patterns. We propose a simple, general-purpose approach using polygenic indexes (PGIs). Our approach can estimate the fraction of genetic variance and genetic correlation that is driven by AM. Our approach is less effective when applied to Mendelian randomization (MR) studies for two reasons: AM can induce a form of selection bias in MR studies that remains after our adjustment; and, in the MR context, the adjustment is particularly sensitive to PGI estimation error. Using data from the UK Biobank, we find that AM inflates genetic correlation estimates between health traits and education by 14% on average. Our results suggest caution in interpreting genetic correlations or MR estimates for traits subject to AM.
    Language English
    Publishing date 2023-09-05
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.09.01.555983
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: OXA-48-Like β-Lactamases: Global Epidemiology, Treatment Options, and Development Pipeline.

    Boyd, Sara E / Holmes, Alison / Peck, Richard / Livermore, David M / Hope, William

    Antimicrobial agents and chemotherapy

    2022  Volume 66, Issue 8, Page(s) e0021622

    Abstract: ... cephalosporin ascendancies were, in their turn, ended by the proliferation of TEM penicillinases and CTX-M ... For carbapenems, however, the threat is increasingly from the insidious rise of a class D carbapenemase, OXA-48 ...

    Abstract Modern medicine is threatened by the rising tide of antimicrobial resistance, especially among Gram-negative bacteria, where resistance to β-lactams is most often mediated by β-lactamases. The penicillin and cephalosporin ascendancies were, in their turn, ended by the proliferation of TEM penicillinases and CTX-M extended-spectrum β-lactamases. These class A β-lactamases have long been considered the most important. For carbapenems, however, the threat is increasingly from the insidious rise of a class D carbapenemase, OXA-48, and its close relatives. Over the past 20 years, OXA-48 and "OXA-48-like" enzymes have proliferated to become the most prevalent enterobacterial carbapenemases across much of Europe, Northern Africa, and the Middle East. OXA-48-like enzymes are notoriously difficult to detect because they often cause only low-level
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/therapeutic use ; Carbapenems/pharmacology ; Carbapenems/therapeutic use ; Enterobacteriaceae ; Humans ; Microbial Sensitivity Tests ; beta-Lactamase Inhibitors/pharmacology ; beta-Lactamase Inhibitors/therapeutic use ; beta-Lactamases/genetics
    Chemical Substances Anti-Bacterial Agents ; Carbapenems ; beta-Lactamase Inhibitors ; beta-Lactamases (EC 3.5.2.6)
    Language English
    Publishing date 2022-07-20
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, U.S. Gov't, P.H.S. ; Research Support, Non-U.S. Gov't
    ZDB-ID 217602-6
    ISSN 1098-6596 ; 0066-4804
    ISSN (online) 1098-6596
    ISSN 0066-4804
    DOI 10.1128/aac.00216-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book: The clinical importance of beta-lactam resistance

    Livermore, D. M.

    [papers ... were presented at a roundtable discussion held in Seville on July 16, 1988]

    (Current topics in infectious diseases and clinical microbiology ; 3)

    1990  

    Author's details D. M. Livermore (ed.)
    Series title Current topics in infectious diseases and clinical microbiology ; 3
    Collection
    Keywords Antibiotics, Lactam ; Drug Resistance, Microbial ; Lactamantibiotikum ; Arzneimittelresistenz
    Subject Chemoresistenz ; Medikamentös therapierefraktäres Verhalten ; Pharmakoresistenz ; Betalactamantibiotikum ; Beta-Lactam-Antibiotikum ; Cepheme
    Size V, 40 S. : Ill., graph. Darst.
    Publisher Vieweg
    Publishing place Braunschweig
    Document type Book
    HBZ-ID HT003724814
    ISBN 3-528-07809-X ; 978-3-528-07809-6
    Database Catalogue ZB MED Medicine, Health

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  7. Article ; Online: Carbapenem-Resistant Enterobacterales, Carbapenem Resistant Organisms, Carbapenemase-Producing Enterobacterales, and Carbapenemase-Producing Organisms: Terminology Past its "Sell-By Date" in an Era of New Antibiotics and Regional Carbapenemase Epidemiology.

    Livermore, David M / Nicolau, David P / Hopkins, Katie L / Meunier, Danièle

    Clinical infectious diseases : an official publication of the Infectious Diseases Society of America

    2020  Volume 71, Issue 7, Page(s) 1776–1782

    Abstract: Carbapenem resistance in Gram-negative bacteria is a public health concern. Consequently, numerous government and agency reports discuss carbapenem-resistant Enterobacterales (CRE) and carbapenem-resistant organisms (CROs). Unfortunately, these terms are ...

    Abstract Carbapenem resistance in Gram-negative bacteria is a public health concern. Consequently, numerous government and agency reports discuss carbapenem-resistant Enterobacterales (CRE) and carbapenem-resistant organisms (CROs). Unfortunately, these terms are fuzzy. Do they include (1) Proteeae with inherent imipenem resistance; (2) porin-deficient Enterobacterales resistant to ertapenem but not other carbapenems; (3) Enterobacterales with OXA-48-like enzymes that remain "carbapenem susceptible" at breakpoint; and (4) Pseudomonas aeruginosa that merely lack porin OprD? Counting CPE or CPOs is better but still insufficient, because different carbapenemases have differing treatment implications, particularly for new β-lactam/β-lactamase inhibitor combinations. At the least, it is essential for authors, journals, and regulatory agencies to specify the carbapenemases meant. The future may demand even greater precision, for mutations can alter hydrolytic activity, and the ability to confer resistance, within carbapenemase families.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Bacterial Proteins/genetics ; Carbapenems/pharmacology ; Humans ; beta-Lactamases/genetics
    Chemical Substances Anti-Bacterial Agents ; Bacterial Proteins ; Carbapenems ; beta-Lactamases (EC 3.5.2.6) ; carbapenemase (EC 3.5.2.6)
    Language English
    Publishing date 2020-01-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1099781-7
    ISSN 1537-6591 ; 1058-4838
    ISSN (online) 1537-6591
    ISSN 1058-4838
    DOI 10.1093/cid/ciaa122
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Review of health economic models exploring and evaluating treatment and management of hospital-acquired pneumonia and ventilator-associated pneumonia.

    Wagner, A P / Enne, V I / Livermore, D M / Craig, J V / Turner, D A

    The Journal of hospital infection

    2020  Volume 106, Issue 4, Page(s) 745–756

    Abstract: Background: Hospital-acquired pneumonia (HAP) is pneumonia that occurs ≥48 h after hospital admission; it is the most common hospital-acquired infection contributing to death. Ventilator-associated pneumonia (VAP) arises ≥48-72 h after intubation. ... ...

    Abstract Background: Hospital-acquired pneumonia (HAP) is pneumonia that occurs ≥48 h after hospital admission; it is the most common hospital-acquired infection contributing to death. Ventilator-associated pneumonia (VAP) arises ≥48-72 h after intubation. Opinions differ on whether VAP is a subset of HAP; the same pathogens predominate in both. Compared with VAP-free controls, patients developing VAP are twice as likely to die and have significantly longer stays in intensive care units. Guidelines recommend that microbiological cultures should guide antibiotic treatment, but these lack sensitivity and take 48-72 h to process, meaning that initial therapy must be empiric, generally with broad-spectrum agents. Given increasing pressure to improve both antibiotic stewardship and patient outcomes, the National Institute for Health and Care Excellence and the Infectious Diseases Society of America recommend research into rapid molecular diagnostic tests to identify causative organisms and their antibiotic resistances. Ideally, these would supersede culture, being quicker and more sensitive. In the UK, the INHALE research programme, funded by the National Institute for Health Research, is exploring rapid molecular diagnostics to inform treatment of HAP/VAP and, given resource implications, incorporates a health economic component.
    Aim: To identify previous economic modelling of HAP/VAP costs to inform this component.
    Methods: Literature review of HAP/VAP studies with economic modelling identified from three databases.
    Findings: Twenty studies were identified. Only one study specifically evaluated strategies to improve diagnosis; the remaining 19 studies omitted this important aspect.
    Conclusion: HAP/VAP modelling would be improved by better awareness of long-term outcomes and treatment complexity. To the authors' knowledge, no similar literature reviews of economic modelling for HAP/VAP have been published.
    MeSH term(s) Animals ; Anti-Bacterial Agents/therapeutic use ; Cross Infection/drug therapy ; Hospitals ; Humans ; Models, Economic ; Pneumonia/drug therapy ; Pneumonia, Ventilator-Associated/drug therapy
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2020-09-21
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 779366-2
    ISSN 1532-2939 ; 0195-6701
    ISSN (online) 1532-2939
    ISSN 0195-6701
    DOI 10.1016/j.jhin.2020.09.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Activity of imipenem/relebactam against Pseudomonas aeruginosa producing ESBLs and carbapenemases.

    Mushtaq, Shazad / Meunier, Danièle / Vickers, Anna / Woodford, Neil / Livermore, David M

    The Journal of antimicrobial chemotherapy

    2020  Volume 76, Issue 2, Page(s) 434–442

    Abstract: ... potentiation was not seen for isolates with class B or D carbapenemase activity.: Conclusions: Relebactam ...

    Abstract Background: ESBL- and carbapenemase-producing Pseudomonas aeruginosa are prevalent in, for example, the Middle East, Eastern Europe and Latin America, though rarer elsewhere. Because P. aeruginosa readily mutate to become carbapenem resistant via loss of OprD, isolates producing ESBLs are often as broadly resistant as those producing carbapenemases. We hypothesized that: (i) relebactam might overcome class A carbapenemases directly in P. aeruginosa; and (ii) relebactam's inhibition of AmpC, which gives a generalized potentiation of imipenem against the species, might restore imipenem susceptibility in OprD-deficient ESBL producers.
    Methods: MICs were determined using CLSI agar dilution for P. aeruginosa isolates producing ESBLs, principally VEB types, and for those producing GES-5, KPC and other carbapenemases.
    Results: Relebactam potentiated imipenem by around 4-8-fold for most P. aeruginosa isolates producing VEB and other ESBLs; however, MICs were typically only reduced to 4-16 mg/L, thus mostly remaining above EUCAST's susceptible range and only partly overlapping CLSI's intermediate range. Strong (approx. 64-fold) potentiation was seen for isolates producing KPC carbapenemases, but only 2-fold synergy for those with GES-5. Predictably, potentiation was not seen for isolates with class B or D carbapenemase activity.
    Conclusions: Relebactam did potentiate imipenem against ESBL-producing P. aeruginosa, which are mostly imipenem resistant via OprD loss, but this potentiation was generally insufficient to reduce imipenem MICs to the clinical range. Imipenem resistance owing to KPC carbapenemases was reversed by relebactam in P. aeruginosa, just as for Enterobacterales.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Azabicyclo Compounds/pharmacology ; Bacterial Proteins ; Europe, Eastern ; Imipenem/pharmacology ; Microbial Sensitivity Tests ; Middle East ; Pseudomonas aeruginosa ; beta-Lactamases/genetics
    Chemical Substances Anti-Bacterial Agents ; Azabicyclo Compounds ; Bacterial Proteins ; Imipenem (71OTZ9ZE0A) ; beta-Lactamases (EC 3.5.2.6) ; carbapenemase (EC 3.5.2.6) ; relebactam (Y1MYA2UHFL)
    Language English
    Publishing date 2020-11-05
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 191709-2
    ISSN 1460-2091 ; 0305-7453
    ISSN (online) 1460-2091
    ISSN 0305-7453
    DOI 10.1093/jac/dkaa456
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Defining an extended-spectrum beta-lactamase.

    Livermore, D M

    Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

    2008  Volume 14 Suppl 1, Page(s) 3–10

    Abstract: ... M and VEB types; (ii) TEM and SHV mutants with borderline ESBL activity, e.g., TEM-12; and (iii ...

    Abstract The term 'extended-spectrum beta-lactamase' (ESBL), initially 'extended-broad-spectrum beta-lactamase', was first coined for derivatives of TEM and SHV enzymes able to hydrolyse oxyimino-cephalosporins. These all belonged to beta-lactamase functional group 2be. Subsequently, the term has been stretched to include: (i) enzymes with spectra similar to those of TEM and SHV mutants but derived from other sources, e.g., the CTX-M and VEB types; (ii) TEM and SHV mutants with borderline ESBL activity, e.g., TEM-12; and (iii) various beta-lactamases conferring wider resistance than their parent types but not meeting the definition for group 2be, e.g., OXA derivatives and mutant AmpC types with increased activity against cefepime. It seems best-and pragmatic-that the term 'ESBL' retains its broad modern usage, but that should always be accompanied by mention of the enzyme's family as, e.g., in 'TEM ESBL' or 'OXA ESBL', not as a sole moniker.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Carbapenems/pharmacology ; Cephalosporins/pharmacology ; Escherichia coli/drug effects ; Escherichia coli/enzymology ; Escherichia coli/genetics ; Gram-Negative Bacteria/drug effects ; Gram-Negative Bacteria/enzymology ; Gram-Negative Bacteria/genetics ; Kinetics ; Microbial Sensitivity Tests ; Mutation ; beta-Lactam Resistance ; beta-Lactamases/classification ; beta-Lactamases/genetics ; beta-Lactamases/metabolism ; beta-Lactams/pharmacology
    Chemical Substances Anti-Bacterial Agents ; Carbapenems ; Cephalosporins ; beta-Lactams ; beta-Lactamases (EC 3.5.2.6)
    Language English
    Publishing date 2008-01
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1328418-6
    ISSN 1469-0691 ; 1198-743X ; 1470-9465
    ISSN (online) 1469-0691
    ISSN 1198-743X ; 1470-9465
    DOI 10.1111/j.1469-0691.2007.01857.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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