LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 28

Search options

  1. Article ; Online: A no-Wnt situation for alveolar macrophage self-renewal.

    Suber, Tomeka / Camiolo, Matthew J / Ray, Anuradha

    Immunity

    2021  Volume 54, Issue 6, Page(s) 1099–1101

    Abstract: Alveolar macrophages (AMs) are central to defense against respiratory pathogens. Impediments in restoring AMs after infection increase the risk for superinfection, which is associated with significant morbidity and mortality worldwide. In this issue of ... ...

    Abstract Alveolar macrophages (AMs) are central to defense against respiratory pathogens. Impediments in restoring AMs after infection increase the risk for superinfection, which is associated with significant morbidity and mortality worldwide. In this issue of Immunity, Zhu et al. report a Wnt-β-catenin-HIF-1α axis in AMs that promotes an inflammatory phenotype while restricting proliferation and self-renewal.
    MeSH term(s) Macrophages, Alveolar ; Phenotype
    Language English
    Publishing date 2021-06-07
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2021.05.013
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Inclusion in the Pulmonary, Critical Care, and Sleep Medicine Physician-Scientist Workforce. Building with Intention.

    Suber, Tomeka L / Neptune, Enid R / Lee, Janet S

    ATS scholar

    2020  Volume 1, Issue 4, Page(s) 353–363

    Abstract: Physician-scientists comprise an exceedingly small fraction of the physician workforce. As the fields of pulmonary, critical care, and sleep medicine continue to invest in the development of the physician-scientist workforce, recruitment and retention ... ...

    Abstract Physician-scientists comprise an exceedingly small fraction of the physician workforce. As the fields of pulmonary, critical care, and sleep medicine continue to invest in the development of the physician-scientist workforce, recruitment and retention strategies need to consider the temporal trend in the decline in numbers of trainees pursuing basic research, the challenges of trainees from underrepresented groups in medicine, and opportunities for career and scientific advancement of women physician-scientists. In this perspective article, we examine the headwinds in the training and education of physician-scientists and highlight potential solutions to reverse these trends.
    Language English
    Publishing date 2020-08-12
    Publishing country United States
    Document type Journal Article
    ISSN 2690-7097
    ISSN (online) 2690-7097
    DOI 10.34197/ats-scholar.2020-0026PS
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: An Emerging Role for Megalin as a Regulator of Protein Leak in Acute Lung Injury.

    Suber, Tomeka / Mallampalli, Rama K

    American journal of respiratory cell and molecular biology

    2017  Volume 57, Issue 5, Page(s) 504–505

    MeSH term(s) Acute Lung Injury/metabolism ; Acute Lung Injury/pathology ; Acute Lung Injury/therapy ; Adaptor Proteins, Signal Transducing/metabolism ; Animals ; Humans ; Low Density Lipoprotein Receptor-Related Protein-2/metabolism ; Mice ; Mice, Knockout ; Respiratory Distress Syndrome/metabolism ; Respiratory Distress Syndrome/pathology ; Respiratory Distress Syndrome/therapy
    Chemical Substances Adaptor Proteins, Signal Transducing ; LRP2BP protein, human ; Low Density Lipoprotein Receptor-Related Protein-2
    Language English
    Publishing date 2017-10-30
    Publishing country United States
    Document type Editorial
    ZDB-ID 1025960-0
    ISSN 1535-4989 ; 1044-1549
    ISSN (online) 1535-4989
    ISSN 1044-1549
    DOI 10.1165/rcmb.2017-0224ED
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: Glucocorticoid use in acute respiratory failure from pulmonary causes and association with early changes in the systemic host immune response.

    Al-Yousif, Nameer / Nouraie, Seyed M / Broerman, Matthew J / Zhang, Yingze / Suber, Tomeka L / Evankovich, John / Bain, William G / Kitsios, Georgios D / McVerry, Bryan J / Shah, Faraaz A

    Intensive care medicine experimental

    2024  Volume 12, Issue 1, Page(s) 24

    Abstract: Background: Glucocorticoids are commonly used in patients with or at-risk for acute respiratory distress syndrome (ARDS), but optimal use remains unclear despite well-conducted clinical trials. We performed a secondary analysis in patients previously ... ...

    Abstract Background: Glucocorticoids are commonly used in patients with or at-risk for acute respiratory distress syndrome (ARDS), but optimal use remains unclear despite well-conducted clinical trials. We performed a secondary analysis in patients previously enrolled in the Acute Lung Injury and Biospecimen Repository at the University of Pittsburgh. The primary aim of our study was to investigate early changes in host response biomarkers in response to real-world use of glucocorticoids in patients with acute respiratory failure due to ARDS or at-risk due to a pulmonary insult. Participants had baseline plasma samples obtained on study enrollment and on follow-up 3 to 5 days later to measure markers of innate immunity (IL-6, IL-8, IL-10, TNFr1, ST2, fractalkine), epithelial injury (sRAGE), endothelial injury (angiopoietin-2), and host response to bacterial infections (procalcitonin, pentraxin-3). In our primary analyses, we investigated the effect of receiving glucocorticoids between baseline and follow-up samples on host response biomarkers measured at follow-up by doubly robust inverse probability weighting analysis. In exploratory analyses, we examined associations between glucocorticoid use and previously characterized host response subphenotypes (hyperinflammatory and hypoinflammatory).
    Results: 67 of 148 participants (45%) received glucocorticoids between baseline and follow-up samples. Dose and type of glucocorticoids varied. Regimens that used hydrocortisone alone were most common (37%), and median daily dose was equivalent to 40 mg methylprednisolone (interquartile range: 21, 67). Participants who received glucocorticoids were more likely to be female, to be on immunosuppressive therapy at baseline, and to have higher baseline levels of ST-2, fractalkine, IL-10, pentraxin-3, sRAGE, and TNFr1. Glucocorticoid use was associated with decreases in IL-6 and increases in fractalkine. In exploratory analyses, glucocorticoid use was more frequent in participants in the hyperinflammatory subphenotype (58% vs 40%, p = 0.05), and was not associated with subphenotype classification at the follow-up time point (p = 0.16).
    Conclusions: Glucocorticoid use varied in a cohort of patients with or at-risk for ARDS and was associated with early changes in the systemic host immune response.
    Language English
    Publishing date 2024-03-05
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2740385-3
    ISSN 2197-425X
    ISSN 2197-425X
    DOI 10.1186/s40635-024-00605-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Serum metabolomic signatures of fatty acid oxidation defects differentiate host-response subphenotypes of acute respiratory distress syndrome.

    Suber, Tomeka L / Wendell, Stacy G / Mullett, Steven J / Zuchelkowski, Benjamin / Bain, William / Kitsios, Georgios D / McVerry, Bryan J / Ray, Prabir / Ray, Anuradha / Mallampalli, Rama K / Zhang, Yingze / Shah, Faraaz / Nouraie, Seyed Mehdi / Lee, Janet S

    Respiratory research

    2023  Volume 24, Issue 1, Page(s) 136

    Abstract: Background: Fatty acid oxidation (FAO) defects have been implicated in experimental models of acute lung injury and associated with poor outcomes in critical illness. In this study, we examined acylcarnitine profiles and 3-methylhistidine as markers of ... ...

    Abstract Background: Fatty acid oxidation (FAO) defects have been implicated in experimental models of acute lung injury and associated with poor outcomes in critical illness. In this study, we examined acylcarnitine profiles and 3-methylhistidine as markers of FAO defects and skeletal muscle catabolism, respectively, in patients with acute respiratory failure. We determined whether these metabolites were associated with host-response ARDS subphenotypes, inflammatory biomarkers, and clinical outcomes in acute respiratory failure.
    Methods: In a nested case-control cohort study, we performed targeted analysis of serum metabolites of patients intubated for airway protection (airway controls), Class 1 (hypoinflammatory), and Class 2 (hyperinflammatory) ARDS patients (N = 50 per group) during early initiation of mechanical ventilation. Relative amounts were quantified by liquid chromatography high resolution mass spectrometry using isotope-labeled standards and analyzed with plasma biomarkers and clinical data.
    Results: Of the acylcarnitines analyzed, octanoylcarnitine levels were twofold increased in Class 2 ARDS relative to Class 1 ARDS or airway controls (P = 0.0004 and < 0.0001, respectively) and was positively associated with Class 2 by quantile g-computation analysis (P = 0.004). In addition, acetylcarnitine and 3-methylhistidine were increased in Class 2 relative to Class 1 and positively correlated with inflammatory biomarkers. In all patients within the study with acute respiratory failure, increased 3-methylhistidine was observed in non-survivors at 30 days (P = 0.0018), while octanoylcarnitine was increased in patients requiring vasopressor support but not in non-survivors (P = 0.0001 and P = 0.28, respectively).
    Conclusions: This study demonstrates that increased levels of acetylcarnitine, octanoylcarnitine, and 3-methylhistidine distinguish Class 2 from Class 1 ARDS patients and airway controls. Octanoylcarnitine and 3-methylhistidine were associated with poor outcomes in patients with acute respiratory failure across the cohort independent of etiology or host-response subphenotype. These findings suggest a role for serum metabolites as biomarkers in ARDS and poor outcomes in critically ill patients early in the clinical course.
    MeSH term(s) Humans ; Acetylcarnitine ; Case-Control Studies ; Biomarkers ; Respiratory Distress Syndrome/diagnosis ; Respiratory Insufficiency/diagnosis ; Respiratory Insufficiency/complications ; Fatty Acids
    Chemical Substances octanoylcarnitine (S1HB7P0O16) ; Acetylcarnitine (6DH1W9VH8Q) ; Biomarkers ; Fatty Acids
    Language English
    Publishing date 2023-05-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041675-1
    ISSN 1465-993X ; 1465-993X
    ISSN (online) 1465-993X
    ISSN 1465-993X
    DOI 10.1186/s12931-023-02447-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: In vivo

    Bain, William / Ahn, Brian / Peñaloza, Hernán F / McElheny, Christi L / Tolman, Nathanial / van der Geest, Rick / Gonzalez-Ferrer, Shekina / Chen, Nathalie / An, Xiaojing / Hosuru, Ria / Tabary, Mohammadreza / Papke, Erin / Kohli, Naina / Farooq, Nauman / Bachman, William / Olonisakin, Tolani F / Xiong, Zeyu / Griffith, Marissa P / Sullivan, Mara /
    Franks, Jonathan / Mustapha, Mustapha M / Iovleva, Alina / Suber, Tomeka / Shanks, Robert Q / Ferreira, Viviana P / Stolz, Donna B / Van Tyne, Daria / Doi, Yohei / Lee, Janet S

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Klebsiella ... ...

    Abstract Klebsiella pneumoniae
    Language English
    Publishing date 2023-06-01
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.05.31.542722
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: In vivo evolution of a Klebsiella pneumoniae capsule defect with wcaJ mutation promotes complement-mediated opsono-phagocytosis during recurrent infection.

    Bain, William / Ahn, Brian / Peñaloza, Hernán F / McElheny, Christi L / Tolman, Nathanial / van der Geest, Rick / Gonzalez-Ferrer, Shekina / Chen, Nathalie / An, Xiaojing / Hosuru, Ria / Tabary, Mohammadreza / Papke, Erin / Kohli, Naina / Farooq, Nauman / Bachman, William / Olonisakin, Tolani F / Xiong, Zeyu / Griffith, Marissa P / Sullivan, Mara /
    Franks, Jonathan / Mustapha, Mustapha M / Iovleva, Alina / Suber, Tomeka / Shanks, Robert Q / Ferreira, Viviana P / Stolz, Donna B / Van Tyne, Daria / Doi, Yohei / Lee, Janet S

    The Journal of infectious diseases

    2024  

    Abstract: Background: Klebsiella pneumoniae carbapenemase-producing K. pneumoniae (KPC-Kp) bloodstream infections are associated with high mortality. We studied clinical bloodstream KPC-Kp isolates to investigate mechanisms of resistance to complement, a key host ...

    Abstract Background: Klebsiella pneumoniae carbapenemase-producing K. pneumoniae (KPC-Kp) bloodstream infections are associated with high mortality. We studied clinical bloodstream KPC-Kp isolates to investigate mechanisms of resistance to complement, a key host defense against bloodstream infection.
    Methods: We tested growth of KPC-Kp isolates in human serum. In serial isolates from a single patient, we performed whole genome sequencing and tested for complement resistance and binding by mixing study, direct ELISA, flow cytometry, and electron microscopy. We utilized an isogenic deletion mutant in phagocytosis assays and an acute lung infection model.
    Results: We found serum resistance in 16 of 59 (27%) KPC-Kp clinical bloodstream isolates. In five genetically-related bloodstream isolates from a single patient, we noted a loss-of-function mutation in the capsule biosynthesis gene, wcaJ. Disruption of wcaJ was associated with decreased polysaccharide capsule, resistance to complement-mediated killing, and surprisingly, increased binding of complement proteins. Furthermore, an isogenic wcaJ deletion mutant exhibited increased opsono-phagocytosis in vitro and impaired in vivo control in the lung after airspace macrophage depletion in mice.
    Conclusions: Loss of function in wcaJ led to increased complement resistance, complement binding, and opsono-phagocytosis, which may promote KPC-Kp persistence by enabling co-existence of increased bloodstream fitness and reduced tissue virulence.
    Language English
    Publishing date 2024-01-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3019-3
    ISSN 1537-6613 ; 0022-1899
    ISSN (online) 1537-6613
    ISSN 0022-1899
    DOI 10.1093/infdis/jiae003
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Lung Epithelium Releases Growth Differentiation Factor 15 in Response to Pathogen-mediated Injury.

    Shah, Faraaz A / Bahudhanapati, Harinath / Jiang, Mao / Tabary, Mohammadreza / van der Geest, Rick / Tolman, Nathanial J / Kochin, Megan / Xiong, Zeyu / Al-Yousif, Nameer / Sayed, Khaled / Benos, Panayiotis V / Raffensperger, Kristen / Evankovich, John / Neal, Matthew D / Snyder, Mark E / Eickelberg, Oliver / Ray, Prabir / Dela Cruz, Charles / Bon, Jessica /
    McVerry, Bryan J / Straub, Adam C / Jurczak, Michael J / Suber, Tomeka L / Zhang, Yingze / Chen, Kong / Kitsios, Georgios D / Lee, Janet S / Alder, Jonathan K / Bain, William G

    American journal of respiratory cell and molecular biology

    2024  Volume 70, Issue 5, Page(s) 379–391

    Abstract: GDF15 (growth differentiation factor 15) is a stress cytokine with several proposed roles, including support of stress erythropoiesis. Higher circulating GDF15 levels are prognostic of mortality during acute respiratory distress syndrome, but the ... ...

    Abstract GDF15 (growth differentiation factor 15) is a stress cytokine with several proposed roles, including support of stress erythropoiesis. Higher circulating GDF15 levels are prognostic of mortality during acute respiratory distress syndrome, but the cellular sources and downstream effects of GDF15 during pathogen-mediated lung injury are unclear. We quantified GDF15 in lower respiratory tract biospecimens and plasma from patients with acute respiratory failure. Publicly available data from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection were reanalyzed. We used mouse models of hemorrhagic acute lung injury mediated by
    MeSH term(s) Growth Differentiation Factor 15/genetics ; Growth Differentiation Factor 15/metabolism ; Animals ; COVID-19/metabolism ; COVID-19/virology ; Humans ; Mice ; SARS-CoV-2 ; Pseudomonas aeruginosa ; Lung/metabolism ; Lung/pathology ; Lung/virology ; Male ; Pseudomonas Infections/metabolism ; Acute Lung Injury/pathology ; Acute Lung Injury/metabolism ; Female ; Mice, Inbred C57BL ; Mice, Knockout ; Respiratory Mucosa/metabolism ; Respiratory Mucosa/pathology ; Disease Models, Animal
    Chemical Substances Growth Differentiation Factor 15 ; GDF15 protein, human ; Gdf15 protein, mouse
    Language English
    Publishing date 2024-02-01
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1025960-0
    ISSN 1535-4989 ; 1044-1549
    ISSN (online) 1535-4989
    ISSN 1044-1549
    DOI 10.1165/rcmb.2023-0429OC
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Considerations for Racial Diversity in the Cardiology Workforce in the United States of America.

    Johnson, Amber E / Birru Talabi, Mehret / Bonifacino, Eliana / Culyba, Alison J / Jonassaint, Naudia L / Nance, Melonie A / Napoé, G Sarah / Olafiranye, Oladipupo / Owusu-Ansah, Sylvia / Suber, Tomeka L

    Journal of the American College of Cardiology

    2021  Volume 77, Issue 15, Page(s) 1934–1937

    MeSH term(s) Cardiology/statistics & numerical data ; Cardiovascular Diseases/epidemiology ; Cardiovascular Diseases/ethnology ; Cardiovascular Diseases/therapy ; Continental Population Groups/statistics & numerical data ; Cultural Competency ; Cultural Diversity ; Ethnic Groups/statistics & numerical data ; Health Workforce/statistics & numerical data ; Humans ; Population Groups/statistics & numerical data ; United States/epidemiology
    Language English
    Publishing date 2021-04-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 605507-2
    ISSN 1558-3597 ; 0735-1097
    ISSN (online) 1558-3597
    ISSN 0735-1097
    DOI 10.1016/j.jacc.2021.02.043
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: AM966, an Antagonist of Lysophosphatidic Acid Receptor 1, Increases Lung Microvascular Endothelial Permeability through Activation of Rho Signaling Pathway and Phosphorylation of VE-Cadherin.

    Cai, Junting / Wei, Jianxin / Li, Shuang / Suber, Tomeka / Zhao, Jing

    Mediators of inflammation

    2017  Volume 2017, Page(s) 6893560

    Abstract: Maintenance of pulmonary endothelial barrier integrity is important for reducing severity of lung injury. Lysophosphatidic acid (LPA) regulates cell motility, cytoskeletal rearrangement, and cell growth. Knockdown of LPA receptor 1 (LPA1) has been shown ... ...

    Abstract Maintenance of pulmonary endothelial barrier integrity is important for reducing severity of lung injury. Lysophosphatidic acid (LPA) regulates cell motility, cytoskeletal rearrangement, and cell growth. Knockdown of LPA receptor 1 (LPA1) has been shown to mitigate lung injury and pulmonary fibrosis. AM966, an LPA1 antagonist exhibiting an antifibrotic property, has been considered to be a future antifibrotic medicine. Here, we report an unexpected effect of AM966, which increases lung endothelial barrier permeability. An electric cell-substrate sensing (ECIS) system was used to measure permeability in human lung microvascular endothelial cells (HLMVECs). AM966 decreased the transendothelial electrical resistance (TEER) value immediately in a dose-dependent manner. VE-cadherin and f-actin double immunostaining reveals that AM966 increases stress fibers and gap formation between endothelial cells. AM966 induced phosphorylation of myosin light chain (MLC) through activation of RhoA/Rho kinase pathway. Unlike LPA treatment, AM966 had no effect on phosphorylation of extracellular signal-regulated kinases (Erk). Further, in LPA1 silencing cells, we observed that AM966-increased lung endothelial permeability as well as phosphorylation of VE-cadherin and focal adhesion kinase (FAK) were attenuated. This study reveals that AM966 induces lung endothelial barrier dysfunction, which is regulated by LPA1-mediated activation of RhoA/MLC and phosphorylation of VE-cadherin.
    MeSH term(s) Antigens, CD/metabolism ; Cadherins/metabolism ; Capillary Permeability/drug effects ; Carbamates/pharmacology ; Cell Line ; Extracellular Signal-Regulated MAP Kinases/metabolism ; Focal Adhesion Protein-Tyrosine Kinases/metabolism ; Humans ; Lung/blood supply ; Phenylacetates/pharmacology ; Phosphorylation/drug effects ; Receptors, Lysophosphatidic Acid/antagonists & inhibitors ; Receptors, Lysophosphatidic Acid/metabolism ; Signal Transduction/drug effects ; rhoA GTP-Binding Protein/metabolism
    Chemical Substances (4'-(4-(1-(2-chlorophenyl)ethoxycarbonylamino)-3-methylisoxazol-5-yl)biphenyl-4-yl)acetic acid ; Antigens, CD ; Cadherins ; Carbamates ; Phenylacetates ; Receptors, Lysophosphatidic Acid ; cadherin 5 ; Focal Adhesion Protein-Tyrosine Kinases (EC 2.7.10.2) ; Extracellular Signal-Regulated MAP Kinases (EC 2.7.11.24) ; rhoA GTP-Binding Protein (EC 3.6.5.2)
    Language English
    Publishing date 2017-02-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1137605-3
    ISSN 1466-1861 ; 0962-9351
    ISSN (online) 1466-1861
    ISSN 0962-9351
    DOI 10.1155/2017/6893560
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top