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Gebhard CE, Sütsch C, Gebert P, Gysi B, Bengs S, Todorov A, Deforth M, Buehler PK, Meisel A, Schuepbach RA, Zinkernagel AS, Brugger SD, Acevedo C, Patriki D, Wiggli B, Beer JH, Friedl A, Twerenbold R, Kuster GM, Pargger H, Tschudin-Sutter S, Schefold JC, Spinetti T, Henze C, Pasqualini M, Sager DF, Mayrhofer L, Grieder M, Tontsch J, Franzeck FC, Wendel Garcia PD, Hofmaenner DA, Scheier T, Bartussek J, Haider A, Grämer M, Mikail N, Rossi A, Zellweger N, Opić P, Portmann A, von Känel R, Pazhenkottil AP, Messerli M, Buechel RR, Kaufmann PA, Treyer V, Siegemund M, Held U, Regitz-Zagrosek V, Gebhard C. Impact of sex and gender on post-COVID-19 syndrome, Switzerland, 2020. Euro Surveill 2024; 29:2300200. [PMID: 38214079 PMCID: PMC10785203 DOI: 10.2807/1560-7917.es.2024.29.2.2300200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 10/04/2023] [Indexed: 01/13/2024] Open
Abstract
BackgroundWomen are overrepresented among individuals with post-acute sequelae of SARS-CoV-2 infection (PASC). Biological (sex) as well as sociocultural (gender) differences between women and men might account for this imbalance, yet their impact on PASC is unknown.AimWe assessed the impact of sex and gender on PASC in a Swiss population.MethodOur multicentre prospective cohort study included 2,856 (46% women, mean age 44.2 ± 16.8 years) outpatients and hospitalised patients with PCR-confirmed SARS-CoV-2 infection.ResultsAmong those who remained outpatients during their first infection, women reported persisting symptoms more often than men (40.5% vs 25.5% of men; p < 0.001). This sex difference was absent in hospitalised patients. In a crude analysis, both female biological sex (RR = 1.59; 95% CI: 1.41-1.79; p < 0.001) and a score summarising gendered sociocultural variables (RR = 1.05; 95% CI: 1.03-1.07; p < 0.001) were significantly associated with PASC. Following multivariable adjustment, biological female sex (RR = 0.96; 95% CI: 0.74-1.25; p = 0.763) was outperformed by feminine gender-related factors such as a higher stress level (RR = 1.04; 95% CI: 1.01-1.06; p = 0.003), lower education (RR = 1.16; 95% CI: 1.03-1.30; p = 0.011), being female and living alone (RR = 1.91; 95% CI: 1.29-2.83; p = 0.001) or being male and earning the highest income in the household (RR = 0.76; 95% CI: 0.60-0.97; p = 0.030).ConclusionSpecific sociocultural parameters that differ in prevalence between women and men, or imply a unique risk for women, are predictors of PASC and may explain, at least in part, the higher incidence of PASC in women. Once patients are hospitalised during acute infection, sex differences in PASC are no longer evident.
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Affiliation(s)
- Caroline E Gebhard
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
- These authors contributed equally
| | - Claudia Sütsch
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- These authors contributed equally
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Pimrapat Gebert
- Institute of Biometry and Clinical Epidemiology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Bianca Gysi
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Susan Bengs
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Atanas Todorov
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Manja Deforth
- Department of Biostatistics at Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Philipp K Buehler
- Institute of Intensive Care, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Alexander Meisel
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Reto A Schuepbach
- Institute of Intensive Care, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Annelies S Zinkernagel
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Silvio D Brugger
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Claudio Acevedo
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Dimitri Patriki
- Department of Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - Benedikt Wiggli
- Department of Internal Medicine, Cantonal Hospital of Baden, Baden, Switzerland
| | - Jürg H Beer
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
- Department of Internal Medicine, Cantonal Hospital of Baden, Baden, Switzerland
| | - Andrée Friedl
- Department of Internal Medicine, Cantonal Hospital of Baden, Baden, Switzerland
| | - Raphael Twerenbold
- Department of Cardiology, University Hospital Basel, Basel, Switzerland
- Department of Cardiology and University Center of Cardiovascular Science, University Heart and Vascular Center Hamburg, Hamburg, Germany
| | - Gabriela M Kuster
- Department of Cardiology, University Hospital Basel, Basel, Switzerland
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Hans Pargger
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Sarah Tschudin-Sutter
- Division of Infectious Diseases and Hospital Epidemiology, University of Basel, Basel, Switzerland
| | - Joerg C Schefold
- Department of Intensive Care Medicine, Inselspital Bern University Hospital, University of Bern, Bern, Switzerland
| | - Thibaud Spinetti
- Department of Intensive Care Medicine, Inselspital Bern University Hospital, University of Bern, Bern, Switzerland
| | - Chiara Henze
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Mina Pasqualini
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Dominik F Sager
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Lilian Mayrhofer
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Mirjam Grieder
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Janna Tontsch
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Fabian C Franzeck
- Department of Informatics, University Hospital Basel, Basel, Switzerland
| | - Pedro D Wendel Garcia
- Institute of Intensive Care, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Daniel A Hofmaenner
- Institute of Intensive Care, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Thomas Scheier
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Jan Bartussek
- Department of Quantitative Biomedicine, University of Zurich, Zurich, Switzerland
- Institute of Intensive Care, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Ahmed Haider
- Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital, and Department of Radiology, Harvard Medical School, Boston, Massachusetts, United States
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Muriel Grämer
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Nidaa Mikail
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Alexia Rossi
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Núria Zellweger
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Petra Opić
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Angela Portmann
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
| | - Roland von Känel
- Department of Consultation-Liaison Psychiatry and Psychosomatic Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Aju P Pazhenkottil
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Michael Messerli
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Ronny R Buechel
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Philipp A Kaufmann
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Valerie Treyer
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Martin Siegemund
- Intensive Care Unit, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Ulrike Held
- Department of Biostatistics at Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Vera Regitz-Zagrosek
- Institute of Gender in Medicine (GiM), Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Catherine Gebhard
- Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, Schlieren, Switzerland
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Acevedo C, Rajput S, Yuan Y, Krisher R, Barfield J. 112 Growth factor receptors in bison blastocysts and expanded blastocysts. Reprod Fertil Dev 2022. [DOI: 10.1071/rdv35n2ab112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Schweizer TA, Andreoni F, Acevedo C, Scheier TC, Heggli I, Maggio EM, Eberhard N, Brugger SD, Dudli S, Zinkernagel AS. Intervertebral disc cell chondroptosis elicits neutrophil response in Staphylococcus aureus spondylodiscitis. Front Immunol 2022; 13:908211. [PMID: 35967370 PMCID: PMC9366608 DOI: 10.3389/fimmu.2022.908211] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 07/06/2022] [Indexed: 11/13/2022] Open
Abstract
To understand the pathophysiology of spondylodiscitis due to Staphylococcus aureus, an emerging infectious disease of the intervertebral disc (IVD) and vertebral body with a high complication rate, we combined clinical insights and experimental approaches. Clinical data and histological material of nine patients suffering from S. aureus spondylodiscitis were retrospectively collected at a single center. To mirror the clinical findings experimentally, we developed a novel porcine ex vivo model mimicking acute S. aureus spondylodiscitis and assessed the interaction between S. aureus and IVD cells within their native environment. In addition, the inflammatory features underlying this interaction were assessed in primary human IVD cells. Finally, mirroring the clinical findings, we assessed primary human neutrophils for their ability to respond to secreted inflammatory modulators of IVD cells upon the S. aureus challenge. Acute S. aureus spondylodiscitis in patients was characterized by tissue necrosis and neutrophil infiltration. Additionally, the presence of empty IVD cells’ lacunae was observed. This was mirrored in the ex vivo porcine model, where S. aureus induced extensive IVD cell death, leading to empty lacunae. Concomitant engagement of the apoptotic and pyroptotic cell death pathways was observed in primary human IVD cells, resulting in cytokine release. Among the released cytokines, functionally intact neutrophil-priming as well as broad pro- and anti-inflammatory cytokines which are known for their involvement in IVD degeneration were found. In patients as well as ex vivo in a novel porcine model, S. aureus IVD infection caused IVD cell death, resulting in empty lacunae, which was accompanied by the release of inflammatory markers and recruitment of neutrophils. These findings offer valuable insights into the important role of inflammatory IVD cell death during spondylodiscitis and potential future therapeutic approaches.
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Affiliation(s)
- Tiziano A. Schweizer
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Federica Andreoni
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Claudio Acevedo
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Thomas C. Scheier
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Irina Heggli
- Center of Experimental Rheumatology, University Hospital Zurich and Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Department of Physical Medicine and Rheumatology, University Hospital Zurich and Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Ewerton Marques Maggio
- Department of Pathology and Molecular Pathology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Nadia Eberhard
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Silvio D. Brugger
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Stefan Dudli
- Center of Experimental Rheumatology, University Hospital Zurich and Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Center for Applied Biotechnology and Molecular Medicine (CABMM), University of Zurich, Zurich, Switzerland
| | - Annelies S. Zinkernagel
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Center for Applied Biotechnology and Molecular Medicine (CABMM), University of Zurich, Zurich, Switzerland
- *Correspondence: Annelies S. Zinkernagel,
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Mairpady Shambat S, Gómez-Mejia A, Schweizer TA, Huemer M, Chang CC, Acevedo C, Bergada-Pijuan J, Vulin C, Hofmaenner DA, Scheier TC, Hertegonne S, Parietti E, Miroshnikova N, Wendel Garcia PD, Hilty MP, Buehler PK, Schuepbach RA, Brugger SD, Zinkernagel AS. Hyperinflammatory environment drives dysfunctional myeloid cell effector response to bacterial challenge in COVID-19. PLoS Pathog 2022; 18:e1010176. [PMID: 35007290 PMCID: PMC8782468 DOI: 10.1371/journal.ppat.1010176] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 01/21/2022] [Accepted: 12/06/2021] [Indexed: 02/06/2023] Open
Abstract
COVID-19 displays diverse disease severities and symptoms including acute systemic inflammation and hypercytokinemia, with subsequent dysregulation of immune cells. Bacterial superinfections in COVID-19 can further complicate the disease course and are associated with increased mortality. However, there is limited understanding of how SARS-CoV-2 pathogenesis and hypercytokinemia impede the innate immune function against bacterial superinfections. We assessed the influence of COVID-19 plasma hypercytokinemia on the functional responses of myeloid immune cells upon bacterial challenges from acute-phase COVID-19 patients and their corresponding recovery-phase. We show that a severe hypercytokinemia status in COVID-19 patients correlates with the development of bacterial superinfections. Neutrophils and monocytes derived from COVID-19 patients in their acute-phase showed an impaired intracellular microbicidal capacity upon bacterial challenges. The impaired microbicidal capacity was reflected by abrogated MPO and reduced NETs production in neutrophils along with reduced ROS production in both neutrophils and monocytes. Moreover, we observed a distinct pattern of cell surface receptor expression on both neutrophils and monocytes, in line with suppressed autocrine and paracrine cytokine signaling. This phenotype was characterized by a high expression of CD66b, CXCR4 and low expression of CXCR1, CXCR2 and CD15 in neutrophils and low expression of HLA-DR, CD86 and high expression of CD163 and CD11b in monocytes. Furthermore, the impaired antibacterial effector function was mediated by synergistic effect of the cytokines TNF-α, IFN-γ and IL-4. COVID-19 patients receiving dexamethasone showed a significant reduction of overall inflammatory markers in the plasma as well as exhibited an enhanced immune response towards bacterial challenge ex vivo. Finally, broad anti-inflammatory treatment was associated with a reduction in CRP, IL-6 levels as well as length of ICU stay and ventilation-days in critically ill COVID-19 patients. Our data provides insights into the transient functional dysregulation of myeloid immune cells against subsequent bacterial infections in COVID-19 patients and describe a beneficial role for the use of dexamethasone in these patients.
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Affiliation(s)
- Srikanth Mairpady Shambat
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Alejandro Gómez-Mejia
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Tiziano A. Schweizer
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Markus Huemer
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Chun-Chi Chang
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Claudio Acevedo
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Judith Bergada-Pijuan
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Clément Vulin
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Daniel A. Hofmaenner
- Institute of Intensive Care, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Thomas C. Scheier
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Sanne Hertegonne
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Elena Parietti
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Nataliya Miroshnikova
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Pedro D. Wendel Garcia
- Institute of Intensive Care, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Matthias P. Hilty
- Institute of Intensive Care, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Philipp Karl Buehler
- Institute of Intensive Care, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Reto A. Schuepbach
- Institute of Intensive Care, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Silvio D. Brugger
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Annelies S. Zinkernagel
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
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Schweizer TA, Mairpady Shambat S, Vulin C, Hoeller S, Acevedo C, Huemer M, Gomez‐Mejia A, Chang C, Baum J, Hertegonne S, Hitz E, Scheier TC, Hofmaenner DA, Buehler PK, Moch H, Schuepbach RA, Brugger SD, Zinkernagel AS. Blunted sFasL signalling exacerbates TNF-driven neutrophil necroptosis in critically ill COVID-19 patients. Clin Transl Immunology 2021; 10:e1357. [PMID: 34938538 PMCID: PMC8665925 DOI: 10.1002/cti2.1357] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 10/26/2021] [Accepted: 11/03/2021] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Critically ill coronavirus disease 2019 (COVID-19) patients are characterised by a severely dysregulated cytokine profile and elevated neutrophil counts, impacting disease severity. However, it remains unclear how neutrophils contribute to pathophysiology during COVID-19. Here, we assessed the impact of the dysregulated cytokine profile on the regulated cell death (RCD) programme of neutrophils. METHODS Regulated cell death phenotype of neutrophils isolated from critically ill COVID-19 patients or healthy donors and stimulated with COVID-19 or healthy plasma ex vivo was assessed by flow cytometry, time-lapse microscopy and cytokine multiplex analysis. Immunohistochemistry of COVID-19 patients and control biopsies were performed to assess the in situ neutrophil RCD phenotype. Plasma cytokine levels of COVID-19 patients and healthy donors were measured by multiplex analysis. Clinical parameters were correlated to cytokine levels of COVID-19 patients. RESULTS COVID-19 plasma induced a necroptosis-sensitive neutrophil phenotype, characterised by cell lysis, elevated release of damage-associated molecular patterns (DAMPs), increased receptor-interacting serine/threonine-protein kinase (RIPK) 1 levels and mixed lineage kinase domain-like pseudokinase (MLKL) involvement. The occurrence of neutrophil necroptosis MLKL axis was further confirmed in COVID-19 thrombus and lung biopsies. Necroptosis was induced by the tumor necrosis factor receptor 1 (TNFRI)/TNF-α axis. Moreover, reduction of soluble Fas ligand (sFasL) levels in COVID-19 patients and hence decreased signalling to Fas directly increased RIPK1 levels, exacerbated TNF-driven necroptosis and correlated with disease severity, which was abolished in patients treated with glucocorticoids. CONCLUSION Our results suggest a novel role for sFasL signalling in the TNF-α-induced RCD programme in neutrophils during COVID-19 and a potential therapeutic target to curb inflammation and thus influence disease severity and outcome.
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Affiliation(s)
- Tiziano A Schweizer
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Srikanth Mairpady Shambat
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Clement Vulin
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Sylvia Hoeller
- Department of Pathology and Molecular PathologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Claudio Acevedo
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Markus Huemer
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Alejandro Gomez‐Mejia
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Chun‐Chi Chang
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Jeruscha Baum
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Sanne Hertegonne
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Eva Hitz
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Thomas C Scheier
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Daniel A Hofmaenner
- Institute for Intensive Care MedicineUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Philipp K Buehler
- Institute for Intensive Care MedicineUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Holger Moch
- Department of Pathology and Molecular PathologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Reto A Schuepbach
- Institute for Intensive Care MedicineUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Silvio D Brugger
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
| | - Annelies S Zinkernagel
- Department of Infectious Diseases and Hospital EpidemiologyUniversity Hospital of ZurichUniversity of ZurichZurichSwitzerland
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Acevedo C, Romo S, López C, Cortes-Mcnealy A, Cruz-González MI, Parlange A, Kjelland ME. 88 Evaluation of embryo transfer results using embryos cryopreserved in ethylene glycol for 8 years or in glycerol for 30 years. Reprod Fertil Dev 2019. [DOI: 10.1071/rdv31n1ab88] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Various permeating cryoprotectants, such as glycerol and ethylene glycol, have been used in the cryopreservation of embryos to help maintain cellular viability during indefinite and prolonged periods of storage in liquid nitrogen. The objective of this study was to compare the efficiency of glycerol (G) and ethylene glycol (EG) after storage in liquid nitrogen for a considerable period of time before transfer. The work was carried out in Palenque, Chiapas, Mexico. A total of 50 embryos were transferred, 24 Brahman (G) cryopreserved in the 1990s and 26 Brangus (EG) cryopreserved in 2010. Synchronous recipients were selected based on 3 characteristics: body condition (5-7, scale of 1-9), reproductive health, and multiparity. Recipient cows (n=62) were synchronized using a FTET protocol as follows. On Day 0, cows received a progesterone intravaginal device (CIDR) and 2mg of oestradiol benzoate IM. On day 8, the CIDR was removed and all cows received 25mg of dinoprost tromethamine (Lutalyse, Pfizer Animal Health, Montreal, Quebec, Canada), 200IU of eCG, and 0.5mg oestradiol cipionate IM. Day 10 was considered the day of oestrus and embryos were transferred (n=50) to the ipsilateral uterine horn of those recipients with a corpus luteum greater than 1.5cm in diameter on Day 17. The G embryos were produced with 4 bulls whereas the EG embryos were produced with 6 different bulls. The G straws were thawed for 12s in the air plus 12s in 20°C water. Embryos were immersed for 8min in a thawing solution containing 1.0M sucrose (ViGRO One-Step) and then transferred to holding medium (ViGRO Holding) for rehydration before loading into straws for embryo transfer. The EG embryos were thawed by allowing the straws to stand in air for 10s and then immersing them in a 30°C water bath for 10s and were transferred immediately. Pregnancy diagnosis 35 days after the transfer revealed 19 pregnancies of 50 embryos transferred (38%), distributed as 46% embryos in EG (12 pregnant of 26 transferred) and 29% embryos in G (7 pregnant of 24). A Fisher’s exact test was performed showing that no significant difference existed between groups (P>0.05). There was no effect of bull on pregnancy rates, and Brahman breed results by individual bull were 5 pregnancies of 13 (38%), 2 of 6 (33%), 0 of 4 (0%), and 0 of 1 (0%) for bulls I to IV, respectively. Pregnancy rate by Brangus bulls were 6 pregnancies of 7 (86%), 2 of 3 (67%), 2 of 4 (50%), 2 of 4 (50%), 0 of 4 (0%), and 0 of 3 (0%) for bulls 1 to 6, respectively. It is important to remember that the embryos cryopreserved in G remained in the nitrogen tank for more than 30 years, whereas the embryos cryopreserved in EG remained stored in liquid nitrogen for less than 10 years. Although pregnancy rate was numerically lower with Brahman embryos stored in G, pregnancy rates were considered acceptable considering the length of storage. Future research is needed with greater numbers and different breeds to determine whether G or EG will consistently produce higher embryo viability and pregnancies after storage for considerable periods before transfer.
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Keller XE, Kardas P, Acevedo C, Sais G, Poyet C, Banzola I, Mortezavi A, Seifert B, Sulser T, Hirsch HH, Provenzano M. Antibody response to BK polyomavirus as a prognostic biomarker and potential therapeutic target in prostate cancer. Oncotarget 2016; 6:6459-69. [PMID: 25749042 PMCID: PMC4467449 DOI: 10.18632/oncotarget.3363] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 01/15/2015] [Indexed: 01/29/2023] Open
Abstract
Infectious agents, including the BK polyomavirus (BKPyV), have been proposed as important inflammatory pathogens in prostate cancer. Here, we evaluated whether the preoperative antibody response to BKPyV large T antigen (LTag) and viral capsid protein 1 (VP1) was associated with the risk of biochemical recurrence in 226 patients undergoing radical prostatectomy for primary prostate cancer. Essentially, the multivariate Cox regression analysis revealed that preoperative seropositivity to BKPyV LTag significantly reduced the risk of biochemical recurrence, independently of established predictors of biochemical recurrence such as tumor stage, Gleason score and surgical margin status. The predictive accuracy of the regression model was denotatively increased by the inclusion of the BKPyV LTag serostatus. In contrast, the VP1 serostatus was of no prognostic value. Finally, the BKPyV LTag serostatus was associated with a peculiar cytokine gene expression profile upon assessment of the cellular immune response elicited by LTag. Taken together, our findings suggest that the BKPyV LTag serology may serve as a prognostic factor in prostate cancer. If validated in additional studies, this biomarker may allow for better treatment decisions after radical prostatectomy. Finally, the favorable outcome of LTag seropositive patients may provide a potential opportunity for novel therapeutic approaches targeting a viral antigen.
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Affiliation(s)
- Xavier Etienne Keller
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Piotr Kardas
- Transplantation and Clinical Virology, Department Biomedicine (Haus Petersplatz), University of Basel, CH-4003 Basel, Switzerland
| | - Claudio Acevedo
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Giovanni Sais
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Cédric Poyet
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Irina Banzola
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Ashkan Mortezavi
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Burkhardt Seifert
- Epidemiology, Biostatistics and Prevention Institute, University of Zurich, CH-8001 Zurich, Switzerland
| | - Tullio Sulser
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Hans H Hirsch
- Transplantation and Clinical Virology, Department Biomedicine (Haus Petersplatz), University of Basel, CH-4003 Basel, Switzerland.,Infectious Diseases & Hospital Epidemiology, University Hospital Basel, CH-4031 Basel, Switzerland
| | - Maurizio Provenzano
- Oncology Research Unit, Division of Urology and Division of Surgical Research, University Hospital Zurich, CH-8091 Zurich, Switzerland
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Acevedo C. Latin America's strategic plan for prevention and care of epilepsy. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.09.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sarria-Estrada S, Acevedo C, Mitjana R, Frascheri L, Siurana S, Auger C, Rovira A. Reproducibility of qualitative assessments of temporal lobe atrophy in MRI studies. Radiología (English Edition) 2015. [DOI: 10.1016/j.rxeng.2014.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Schilling S, Bustamante JA, Sala A, Acevedo C, Tapia E, Alvarado R, Sapag JC, Yang LH, Lukens E, Mascayano F, Cid P, Tapia T. Development of an intervention to reduce self-stigma in outpatient mental health service users in Chile. Rev Fac Cien Med Univ Nac Cordoba 2015; 72:284-294. [PMID: 27107279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
BACKGROUND Latin America is characterized by a high prevalence of public stigma toward those with mental illness, and significant selfstigma among labeled individuals, leading to social exclusion, low treatment adherence, and diminished quality of life. However, there is no published evidence of an intervention designed to address stigma in the region. In light of this, a psychosocial intervention to reduce self-stigma among users with severe mental illness was developed and tested through an RCT in two regions of Chile. OBJECTIVES To describe the development of the psychosocial intervention, assess its feasibility and acceptability, and evaluate its preliminary impact. METHODS An intervention was designed and is being tested, with 80 users with severe mental illness attending two community mental health outpatient centers. To prepare the intervention, pertinent literature was reviewed, and experts and mental health services users were consulted. Feasibility and acceptability were assessed, and impact was analyzed, based on follow-up qualitative reports by the participants. RESULTS The recovery-oriented, ten-session group intervention incorporates the Tree of Life narrative approach, along with other narrative practices, to promote a positive identity change in users, and constructivist psychoeducation, based on case studies and group discussions, to gather tools to confront self-stigma. The intervention was feasible to implement and well evaluated by participants, family members, and center professionals. Participants reported increased self-confidence, and the active use of anti-stigma strategies developed during the workshop. CONCLUSIONS This group intervention promises an effective means to reduce stigma of mental illness within Chile and other Latin American countries and feasibility to scale up within mental health services.
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Affiliation(s)
- Sara Schilling
- School of Public Health, Faculty of Medicine, Universidad de Chile. Santiago, Chile
| | | | - Andres Sala
- School of Psychology, Faculty of Medicine, Universidad de Valparaíso. Valparaíso, Chile
| | - Claudio Acevedo
- School of Occupational Therapy, Faculty of Rehabilitation Sciences, Universidad Andrés Bello. Santiago, Chile
| | - Eric Tapia
- School of Public Health, Faculty of Medicine, Universidad de Chile. Santiago, Chile
| | - Ruben Alvarado
- School of Public Health, Faculty of Medicine, Universidad de Chile. Santiago, Chile
| | - Jaime C Sapag
- Departments of Public Health and Family Medicine, School of Medicine, Pontificia Universidad Católica de Chile. Santiago, Chile
| | - Lawrence Hsin Yang
- Department of Epidemiology, Mailman School of Public Health, Columbia University. New York, USA
| | - Ellen Lukens
- School of Social Work, Columbia University. New York, USA
| | - Franco Mascayano
- School of Public Health, Faculty of Medicine, Universidad de Chile. Santiago, Chile
| | - Patricia Cid
- School of Nursing, Faculty of Nursing, Universidad Andrés Bello. Viña del Mar, Chile
| | - Thamara Tapia
- School of Psychology, Faculty of Medicine, Universidad de Valparaíso. Valparaíso, Chile
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Lopez Guerra J, Matute R, Ortiz Gordillo M, Acevedo C, Isa N, Lengua R, Puebla F, Praena-Fernandez J, Beltran C, Azinovic I. EP-1296: Association between ethnicity and toxicity in prostate cancer patients treated with arc radiation therapy. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31414-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Beltran C, Lopez Guerra J, Matute R, Acevedo C, Russo M, Rivin E, Puebla F, Sanchez-reyes A, Jaen J, Azinovic I. Prognostic factors in prostate cancer patients treated with helical tomotherapy. Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Azoury F, Acevedo C, Heymann S, Levy A, Verstraet R, Taghian A, Marsiglia H, Bourgier C. 3D-CRT for Accelerated Partial Breast Irradiation (APBI): Lessons Learned from Patients' Evaluation in a Phase II Trial. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gorzalczany S, Marrassini C, Miño J, Acevedo C, Ferraro G. Antinociceptive activity of ethanolic extract and isolated compounds of Urtica circularis. J Ethnopharmacol 2011; 134:733-738. [PMID: 21277970 DOI: 10.1016/j.jep.2011.01.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 01/14/2011] [Accepted: 01/19/2011] [Indexed: 05/30/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Urtica circularis (Hicken) Sorarú is a medicinal plant commonly used in traditional medicine to relieve pain in inflammatory processes. AIM OF THE STUDY In the present study, the in vivo antinociceptive effect of Urtica circularis ethanolic extract and its isolated compounds has been investigated. MATERIALS AND METHODS Antinociceptive activity was evaluated through writhing, formalin and hot plate tests in mice. The phytochemical analysis was performed. RESULTS The extract produced significant inhibition on nociception induced by acetic acid (ED50: 72.2mg/kg, i.p.) and formalin (ED50: 15.8 mg/kg, i.p.) administered intraperitoneally and also orally. Atropine diminished the activity of the extract in the acetic acid test. In this model, at dose of 10mg/kg i.p., vitexin was the most active of the isolated compounds (inhibition of 91%), and chlorogenic acid, caffeic acid and vicenin-2 (6,8-di-C-glucosyl apigenin) produced an inhibition of 72%, 41% and 41%, respectively, whereas apigenin did not show any activity. CONCLUSIONS These results suggest that Urtica circularis extract produced antinociception possibly related to the presence of vitexin, chlorogenic, caffeic acid and vicenin-2. The activation of cholinergic systems seems to be involved in the mechanism of antinociception of the extract.
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Affiliation(s)
- S Gorzalczany
- Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, C1113AAD Buenos Aires, Argentina.
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Schmiedl A, Krainski J, Schwichtenhövel F, Schade J, Klemann C, Raber KA, Zscheppang K, Beekmann T, Acevedo C, Glaab T, Wedekind D, Pabst R, von Hörsten S, Stephan M. Reduced airway inflammation in CD26/DPP4-deficient F344 rats is associated with altered recruitment patterns of regulatory T cells and expression of pulmonary surfactant proteins. Clin Exp Allergy 2011; 40:1794-808. [PMID: 20560982 DOI: 10.1111/j.1365-2222.2010.03547.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION CD26 is highly expressed on lung epithelial cells as well as on immune cells. Ovalbumin (OVA)-induced airway inflammation induces a further increase of CD26 expression. CD26-deficient rat strains exhibit blunted clinical courses in models of experimental asthma. OBJECTIVE (1) To investigate the involvement of regulatory T cells (Tregs) and the surfactant system in a rat model of genetic CD26 deficiency. (2) To investigate regulatory mechanisms dependent on the endogenous CD26 expression. (3) To investigate the impact of CD26 on surfactant protein (SP)-levels under inflammatory conditions. METHODS Wild-type and CD26-deficient F344 rats were sensitized to and challenged with OVA. Subsequently, airway inflammation, SP levels as well as surface tension of the bronchoalveolar lavage (BAL) fluid were evaluated. RESULTS CD26 deficiency led to decreased airway inflammation, e.g. reduced numbers of eosinophils and activated T cells in the BAL. Remarkably, the CD26-deficient rats exhibited a significantly increased influx of FoxP3(+) Tregs into the lungs and increased IL-10-secretion/production by draining lymph node cells in culture experiments. Furthermore, in OVA-challenged CD26-deficient rats, the increase of the expression of the collectins SP-A and SP-D as well as of the surface tension-active SP-B was significantly less pronounced than in the CD26-positive strain. Only in the wild-type rats, functional alterations of the surfactant system, e.g. the increased surface tension were obvious after OVA challenge. CONCLUSION Reduced airway inflammation in CD26-deficient F344 rats appear to be mediated by differences in the recruitment and activity of Tregs. This altered inflammation is associated with differences in the SP expression as well as function.
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Affiliation(s)
- A Schmiedl
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany.
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Gorzalczany S, López P, Acevedo C, Ferraro G. Anti-inflammatory effect of Lithrea molleoides extracts and isolated active compounds. J Ethnopharmacol 2011; 133:994-998. [PMID: 21094245 DOI: 10.1016/j.jep.2010.11.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2010] [Revised: 11/05/2010] [Accepted: 11/11/2010] [Indexed: 05/30/2023]
Abstract
AIM OF THE STUDY In this study the anti-inflammatory activity of aqueous, dichloromethane (CH₂Cl₂) and methanolic (MeOH) extracts and two major compounds isolated from Lithrea molleoides (Vell.) Engl. (Anacardiaceae) were evaluated. MATERIALS AND METHODS Two classical experimental models were used, carrageenan-induced rat paw edema and 12-O-tetradecanoylphorbol-13 acetate (TPA) induced mouse ear edema. RESULTS MeOH extracts exhibited a significant systemical anti-inflammatory effect in the carrageenan (inhibition of 46% at 3 h) and in the TPA-ear edema test (inhibition of 21%). The presence of methyl gallate (inhibition of 63% in TPA ear edema), as one of the main compounds in the active fraction from MeOH extract may be explained the effect observed. Also, 1,3-dihydroxy-(Z,Z)-5-(tridec-4',7́dienyl) benzene obtained from CH₂Cl₂ extract showed a significant topical anti-inflammatory activity (inhibition of 68%). Furthermore, no signs of toxicity were observed with doses up to 3g/kg in an acute toxicity assay. CONCLUSIONS The results of this study present evidence that Lithrea molleoides given either systemically or topically has anti-inflammatory properties.
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Affiliation(s)
- S Gorzalczany
- Cátedra de Farmacología, Departamento de Farmacología, Facultad de Farmacia y Bioquímica, UBA, Junín 956 (C1113AAD), Buenos Aires, Argentina.
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Simpson R, Almonacid S, Young M, Acevedo C. Chemometyric Study of the Anthocyanin Pathway in Carmenere Grape. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Acevedo C, Valette G, Bouchekoua M, Marianowski R, Pradier O. Association de radiothérapie et de cetuximab chez des patients atteints d’un carcinome épidermoïde de la sphère ORL évolué non opérable : résultats et effets secondaires. Cancer Radiother 2010. [DOI: 10.1016/j.canrad.2010.07.517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Alcaraz M, Acevedo C, Castillo J, Benavente-Garcia O, Armero D, Vicente V, Canteras M. Liposoluble antioxidants provide an effective radioprotective barrier. Br J Radiol 2009; 82:605-9. [PMID: 19188244 DOI: 10.1259/bjr/30930369] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Ionising radiation causes the massive generation of reactive oxygen species and induces cellular DNA damage. The antioxidant, protective effects of several compounds against gamma-ray-induced chromosomal damage were determined by the micronucleus test, evaluating the reduction in the frequency of micronuclei in cytokinesis-blocked human lymphocytes. The compounds studied were added to human blood at 25 microM, 5 min before or after irradiation with 2 Gy of caesium-137. The results suggest that different protective mechanisms are operating in each case. When the phenolic compounds are added before gamma-irradiation, their protective antimutagenic activity is based on their scavenging capacity against superoxide anion (O(2)(.-)) and, especially, hydroxyl radical ((.)OH), regardless of whether they are oil- or water-soluble compounds. When the phenolic compounds are added after gamma-irradiation treatment, the protective effect relies on activity against reactive oxygen species present in cells, i.e. lipoperoxy radicals (R(-)OO(.)), which are mainly responsible for continuous chromosomal oxidative damage. In addition, ionising radiation enhances lysosomal enzyme secretion and arachidonate release from membranes through lipo-oxygenase, cyclo-oxygenase and phospholipase activities, thus increasing the inflammatory cell response. Only oil-soluble compounds, such as carnosic acid, carnosol and delta-tocopherol, provide a significant protective antimutagenic activity. The most powerful water-soluble antioxidants lack the capacity to protect against gamma-ray-induced damage. The difference between anti-radical and anti-lipoperoxidant activities could explain the different behaviour of the compounds tested in terms of protecting against the lipid peroxidative processes. This anti-lipoperoxidant activity depends on several factors, but it is clear that only the lipo-antioxidants are effective in protecting human cells against oxidative damage, even when administered after exposure to ionising radiation.
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Affiliation(s)
- M Alcaraz
- Department of Radiology and Physical Medicine, University of Murcia, Murcia, Spain.
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Fullá J, Acevedo C, Varas M, Huidobro C, Cabezas J, Galleguillos V, Catoni D, Cáceres D, Quiñones L. UP.69: Polymorphism of CYP1a1 MSP1 and Mortality in Patients with Prostatic Cancer: Seven-Year Follow-Up. Urology 2008. [DOI: 10.1016/j.urology.2008.08.396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cabezas J, Huidobro C, Larson T, Fruland B, Acevedo C, Marchant F, Palma C, Olea M, Reyes D, Storme O. SCHU-49: Electrochemical Ablation of the Prostate: A Feasibility Study for the Treatment of Prostate Cancer and Benign Prostatic Hyperplasia. Urology 2008. [DOI: 10.1016/j.urology.2008.08.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ramos P, Acevedo C, Pérez-Tabernero M, de la Casa F. Exoftalmos unilateral de 15 días de evolución en un varón de 39 años. Semergen 2008. [DOI: 10.1016/s1138-3593(08)72342-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Alcaraz-García MJ, Albaladejo MD, Acevedo C, Olea A, Zamora S, Martínez P, Parra S. Effects of hyperoxia on biomarkers of oxidative stress in closed-circuit oxygen military divers. J Physiol Biochem 2008; 64:135-41. [DOI: 10.1007/bf03168241] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Celette F, Valdés H, Gary C, García de Cortázar I, Ortega-Farias S, Acevedo C. EVALUATION OF THE STICS MODEL FOR SIMULATING VINEYARD WATER BALANCE UNDER TWO DIFFERENT WATER MANAGEMENT STRATEGIES. ACTA ACUST UNITED AC 2008. [DOI: 10.17660/actahortic.2008.792.16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Krainski J, Schade J, Raber KA, Zscheppang K, Beekmann T, Acevedo C, Hörsten SV, Stephan M, Schmiedl A. Differentielle Expression der Surfactantproteine (SP) vor und nach OVA-Challenge in CD26 defizienten Fischer Ratten. Pneumologie 2007. [DOI: 10.1055/s-2007-1032283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Clavin M, Gorzalczany S, Macho A, Muñoz E, Ferraro G, Acevedo C, Martino V. Anti-inflammatory activity of flavonoids from Eupatorium arnottianum. J Ethnopharmacol 2007; 112:585-9. [PMID: 17570627 DOI: 10.1016/j.jep.2007.04.007] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Revised: 04/04/2007] [Accepted: 04/11/2007] [Indexed: 05/15/2023]
Abstract
Three anti-inflammatory compounds: nepetin, jaceosidin and hispidulin have been isolated and identified from Eupatorium arnottianum Griseb. dichloromethane extract. Nepetin reduced the TPA mouse ear edema by 46.9% and jaceosidin by 23.2% (1mg/ear). Both compounds inhibited the NF kappaB induction by 91 and 77%, respectively. Furthermore phytochemical analysis of the ethanol extract has led to the identification of eriodictyol, hyperoside, rutin, caffeic and chlorogenic acids. All these compounds are reported for the first time in this species. The finding of topical antiinflammatory activity exerted by Eupatorium arnottianum extract and the identification of active principles could support the use of this plant for the treatment of inflammatory affections.
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Affiliation(s)
- M Clavin
- Department of Pharmacognosy, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Junín 956, 1113 Buenos Aires, Argentina.
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Bernhard W, Dombrowsky H, Tschernig T, Vieten G, Rau GA, Ohler F, Acevedo C, Behrens C, von der Hardt H, Poets C. Funktionelle und molekulare Surfactantveränderungen bei Hyperoxie. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bernhard W, Dombrowsky H, Tschernig T, Vieten G, Rau GA, Ohler F, Acevedo C, Behrens C, von der Hardt H, Poets C. Funktionelle und molekulare Surfactantveränderungen bei Hyperoxie. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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31
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Del Baño MJ, Castillo J, Benavente-García O, Lorente J, Martín-Gil R, Acevedo C, Alcaraz M. Radioprotective-antimutagenic effects of rosemary phenolics against chromosomal damage induced in human lymphocytes by gamma-rays. J Agric Food Chem 2006; 54:2064-8. [PMID: 16536576 DOI: 10.1021/jf0581574] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The radioprotective effects of carnosic acid (CA), carnosol (COL), and rosmarinic acid (RO) against chromosomal damage induced by gamma-rays, compared with those of L-ascorbic acid (AA) and the S-containing compound dimethyl sulfoxide (DMSO), were determined by use of the micronucleus test for antimutagenic activity, evaluating the reduction in the frequency of micronuclei (MN) in cytokinesis-blocked cells of human lymphocytes before and after gamma-ray irradiation. With treatment before gamma-irradiation, the most effective compounds were, in order, CA > RO > or = COL > AA > DMSO. The radioprotective effects (antimutagenic) with treatment after gamma-irradiation were lower, and the most effective compounds were CA and COL. RO and AA presented small radioprotective activity, and the sulfur-containing compound DMSO lacked gamma-ray radioprotection capacity. Therefore, CA and COL are the only compounds that showed a significant antimutagenic activity both before and after gamma-irradiation treatments. These results are closely related to those reported by other authors on the antioxidant activity of the same compounds, and the degree of effectiveness depends on their structure. Furthermore, the results for treatments before and after gamma-ray irradiation suggest the existence of different radioprotective mechanisms in each case.
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Affiliation(s)
- M J Del Baño
- Research and Development Department, Nutrafur-Furfural Español S.A., Camino Viejo de Pliego s/n, 80320 Alcantarilla, Murcia, Spain
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Bernhard W, Gille C, Acevedo C, Rau G, Orlikowsky T, Poets CF. Die Bedeutung des molekularen Designs von Surfactant für die alveoläre Funktion. Pneumologie 2005. [DOI: 10.1055/s-2005-862717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Miño J, Muschietti L, Ferraro G, Martino V, Acevedo C. Antinociceptive activity of Eupatorium buniifolium aqueous extract. Fitoterapia 2005; 76:100-3. [PMID: 15664470 DOI: 10.1016/j.fitote.2004.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2003] [Accepted: 10/20/2004] [Indexed: 10/26/2022]
Abstract
The antinociceptive properties of the aqueous extract of Eupatorium buniifolium aerial parts were investigated in chemical and thermal models of nociception in mice. Oral doses of 250 and 500 mg/kg produced an inhibition of 42.3% and 73.9%, respectively, of the abdominal writhes induced by acetic acid in mice. This antinociceptive effect was not reversed by pretreatment with naloxone. In the formalin test, the administration of 500 and 1000 mg/kg p.o. had no effects in the first phase (0-5 min) but produced a dose-dependent analgesic effect on the second phase (15-30 min) with inhibitions of the licking time of 38.9% and 57.3%, respectively. In the hot plate test, no effect was seen at the dose of 500 mg/kg p.o.
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Affiliation(s)
- J Miño
- Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 (1113), Buenos Aires, Argentina
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Miño J, Moscatelli V, Hnatyszyn O, Gorzalczany S, Acevedo C, Ferraro G. Antinociceptive and antiinflammatory activities of Artemisia copa extracts. Pharmacol Res 2004; 50:59-63. [PMID: 15082030 DOI: 10.1016/j.phrs.2003.12.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/01/2003] [Indexed: 10/26/2022]
Abstract
The aqueous extract from aerial parts of Artemisia copa Phil. (Compositae), was evaluated for antinociceptive activity using writhing, formalin, and hot-plate tests in mice. A dose-related antinociceptive response was obtained in the writhing test at doses of 500 and 1000 mg/kg p.o. (percentage of inhibition 23.3 and 52.70, respectively). The extract also inhibited the second phase of formalin test (38.81%) and this effect was not antagonized by pretreatment with naloxone 5mg/kg i.p. Furthermore, no significant effect was obtained in the hot-plate test. Dichloromethane and ethanolic extracts, were analyzed for antiinflammatory activity with the carrageenan-induced paw edema in rats and the ear edema induced by 12-O-tetradecanoylphorbol-13 acetate (TPA) and arachidonic acid (AA) in mice. Both extracts showed antiinflammatory activity in the TPA (88 and 54%), and the ethanolic extract showed a 37% inhibition in AA test. No effects were seen at doses of 300 mg/kg p.o. and 100 mg/kg i.p. in the carrageenan test. The results obtained indicate that A. copa has analgesic and topical antiinflammatory activities that supports the folk medicinal use of the plant.
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Affiliation(s)
- J Miño
- Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 5do piso CP: 1113, Buenos Aires, Argentina
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Hnatyszyn O, Miño J, Ferraro G, Acevedo C. The hypoglycemic effect of Phyllanthus sellowianus fractions in streptozotocin-induced diabetic mice. Phytomedicine 2002; 9:556-559. [PMID: 12403166 DOI: 10.1078/09447110260573209] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Phyllanthus sellowianus Müller Arg. (Euphorbiaceae) is a plant used in folk medicine as a hypoglycemic and diuretic agent. The present study describes the hypoglycemic effect of fractions obtained from the stem barks of P. sellowianus using a bioassay-guided fractionation protocol and streptozotocin-induced hyperglycemic mice. The aqueous extract was partitioned between dichloromethane and butanol to yield the dichloromethane (D), butanol (B) and the remaining aqueous (A) fractions. Fractions B and A, administered at the dose of 200 mg/kg p.o., caused a significant reduction in blood glucose concentration at 6 and 9 h, while the same dose of fraction D was ineffective. The reduction in blood glucose levels obtained with the B and A fractions was similar to that observed with glibenclamide (10 mg/kg) which was used as a reference for the hypoglycemic activity. Phytochemical analysis of fractions B and A revealed the presence of flavonoid compounds, of which rutin and isoquercitrin were the major constituents, respectively. The possible involvement of these flavonoids in the hypoglycemic effect of the active fractions is discussed.
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Affiliation(s)
- O Hnatyszyn
- Cátedra de Farmacognosia, IQUIMEFA (UBA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina.
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Abstract
The aqueous extract from the aerial parts of Balbisia calycina (Gris.) A.T. Hunziker et Ariza (Ledocarpaceae), was evaluated for antinociceptive activity using the abdominal constriction, hot plate and formalin tests. The extract was administered orally to male mice at doses of 200, 400 and 800 mg/kg. A dose-dependent antinociceptive effect of the extract was obtained with the abdominal constriction test at doses of 400 and 800 mg/kg. This antinociceptive effect was not reversed by pretreatment with naloxone. No significant response was obtained with the hot plate test. With the formalin test doses of 400 and 800 mg/kg had no significant effect during the first phase of the test (0-5 min), while with the dose of 800 mg/kg, a significant inhibition during the second phase (15-30 min) was observed. The phytochemical investigation of the aqueous extract of B. calycina revealed the presence of the flavonoids luteolin, avicularin and hyperoside. The possible involvement of these flavonoids (specially luteolin) in the antinociceptive action is discussed.
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Affiliation(s)
- J Miño
- Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, 1113 Buenos Aires, Argentina
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Abstract
Aerial parts of Achyrocline satureioides(Lam) D. C. (Asteraceae) are used in folk medicine as infusions or decoctions for the management of several diseases including gastrointestinal and hepatic disorders. These data and the presence of flavonoids and caffeoyl derivatives have led us to study its hepatoprotective and choleretic activities. The hepatoprotective activity was evaluated in the bromobenzene- (BB-) induced hepatotoxicity model in mice through the measurement of the serum levels of alanine-aminotransferase (ALT) and aspartate transaminase (AST), thiobarbituric acid reacting substances (TBARS) and glutathione levels. The aqueous extract of the aerial parts of A. satureioides administered before BB, at the dose of 300 mg kg(-1)p.o., demonstrated significant inhibition (P< 0.01) in the BB increase of liver ALT and AST and in the BB-induced increase of liver TBARS content. Also it was able to significantly increase (P< 0.05) the depleted levels of liver glutathione. In addition, at the same dose, a significant increase (P< 0.01) in the bile flow of rats was found. The results obtained with the aqueous extract of A. satureioides support its use in popular medicine as a hepatoprotective and digestive agent, and the effects might be mediated through the antioxidant and choleretic activities.
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Affiliation(s)
- C Kadarian
- Cátedra de Farmacología, Facultada de Farmacia y Bioquímica, Universidade de Buenos Aires, Argentina
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Quiñones L, Lucas D, Godoy J, Cáceres D, Berthou F, Varela N, Lee K, Acevedo C, Martínez L, Aguilera AM, Gil L. CYP1A1, CYP2E1 and GSTM1 genetic polymorphisms. The effect of single and combined genotypes on lung cancer susceptibility in Chilean people. Cancer Lett 2001; 174:35-44. [PMID: 11675150 DOI: 10.1016/s0304-3835(01)00686-3] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
CYP1A1, CYP2E1 and GSTM1 polymorphisms were evaluated in Chilean healthy controls and lung cancer patients. In the Chilean healthy group, frequencies of CYP1A1 variant alleles for MspI (m2 or CYP1A1*2A) and ile/val (val or CYP1A1*2B) polymorphisms were 0.25 and 0.33, respectively. Frequencies of variant alleles C (CYP2E1*6) and c2 (CYP2E1*5B) for CYP2E1 were 0.21 and 0.16, respectively and frequency for GSTM1(-) was 0.24. The presence of variant alleles for GSTM1, MspI and Ile/val polymorphisms was more frequent in cases than in controls. However, frequencies for the c2 and C alleles were not significantly different in controls and in cases. The estimated relative risk for lung cancer associated to a single mutated allele in CYP1A1, CYP2E1 or GSTM1 was 2.41 for m2, 1.69 for val, 1.16 for C, 0.71 for c2 and 2.46 for GSTM1(-). The estimated relative risk was higher for individuals carrying combined CYP1A1 and GSTM1 mutated alleles (m2/val, OR=6.28; m2/GSTM1(-), OR=3.56) and lower in individuals carrying CYP1A1 and CYP2E1 mutated alleles (m2/C, OR=1.39; m2/c2, OR=2.00; val/C, OR=1.45; val/c2, OR=0.48; not significant). The OR values considering smoking were 4.37 for m2, 4.05 for val, 3.47 for GSTM1(-), 7.38 for m2/val and 3.68 for m2/GSTM1(-), higher values than those observed without any stratification by smoking. Taken together, these findings suggest that Chilean people carrying single or combined GSTM1 and CYP1A1 polymorphisms could be more susceptible to lung cancer induced by environmental pollutants such as polycyclic aromatic hydrocarbons.
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Affiliation(s)
- L Quiñones
- Faculty of Medicine, Laboratory of Environmental Toxicology and School of Public Health, University of Chile, Santiago, Chile
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Muschietti L, Gorzalczany S, Ferraro G, Acevedo C, Martino V. Phenolic compounds with anti-inflammatory activity from Eupatorium buniifolium. Planta Med 2001; 67:743-744. [PMID: 11731917 DOI: 10.1055/s-2001-18355] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Anti-inflammatory activity was detected in the CH(2)Cl(2) extract of the aerial parts of Eupatorium buniifolium using the TPA-mouse ear model. Three compounds isolated from this extract, by bioassay-guided fractionation, significantly inhibited the inflammatory response. The compounds were identified as 5,7,5'-trihydroxy-3,6,2',4'-tetramethoxyflavone (1), scopoletin (2) and centaureidin (3) which inhibited the edema by 67.3 %, 59.8 % and 49.7 %, respectively, at a dose of 1 mg/ear.
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Affiliation(s)
- L Muschietti
- Cátedra de Farmacognosia, IQUIMEFA (UBA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina.
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Gorzalczany S, Filip R, Alonso MR, Miño J, Ferraro GE, Acevedo C. Choleretic effect and intestinal propulsion of 'mate' (Ilex paraguariensis) and its substitutes or adulterants. J Ethnopharmacol 2001; 75:291-294. [PMID: 11297866 DOI: 10.1016/s0378-8741(01)00179-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
'Mate' or 'Yerba mate' (Ilex paraguariensis, Aquifoliaceae) is a tonic and stimulant beverage widely used in South America. It is also traditionally used in gastrointestinal disorders as eupeptic and choleretic agent. Accordingly, the effect of decoctions of the leaves of I. paraguariensis and three of its substitutes or adulterants (Ilex brevicuspis, Ilex argentina and Ilex theezans) on bile flow (BF) and intestinal propulsion were investigated. I. paraguariensis and I. brevicuspis induced an increase in BF, while the latter also enhanced intestinal transit. In contrast, neither I. argentina nor I. theezans exerted any effect on BF or intestinal propulsion. These results suggest that the therapeutic properties of I. paraguariensis will be affected when at least an adulterant is present in the final commercial product of Yerba mate.
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Affiliation(s)
- S Gorzalczany
- Cátedra de Farmacología, Facultad de Farmacia y Bioquímica, Junín 956 (1113), Buenos Aires, Argentina
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Abstract
Eupatorium laevigatum, E. arnottianum and E. subhastatum, plants used in Argentine folk medicine for the treatment of inflammation and pain related problems, were evaluated for analgesic activity. The infusions of these species (500 mg/kg, p.o.) produced a reduction in the number of stretches of 46.6%, 41.5% and 35.6% respectively, in the acetic acid induced writhing test. This antinociceptive effect of the infusions was not reversed by pretreatment with naloxone. The infusions studied did not produce antinociceptive effects when assayed in the hot plate test. These results suggest that the analgesic activity is exerted by a mechanism unrelated to interaction with opioid systems.
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Affiliation(s)
- M L Clavin
- Cátedra de Farmacognosia, IQUIMEFA (UBA-CONICET) Universidad de Buenos Aires, Junín 956, 1113 Buenos Aires, República Argentina
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Rollán A, Giancaspero R, Acevedo C, Fuster F, Hola K. [Treatment of Helicobacter pylori infection in patients with duodenal ulcer: a cost-benefit study]. Rev Med Chil 2000; 128:367-77. [PMID: 10962853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
BACKGROUND Epidemiological differences suggest that treatments for H. pylori eradication should be locally validated. AIM To perform a cost benefit study of different treatment options for H. pylori infection. PATIENTS AND METHODS One hundred and sixty-seven patients with active duodenal ulcer and H. pylori infection who completed a 2-week treatment with one of the following regimens were included: famotidine plus amoxycillin plus metronidazole (FAM), omeprazole plus amoxycillin plus tinidazole (OAT) or lansoprazole plus clarithromycin plus amoxycillin in 3 (LAC1) or 2 (LAC2) daily doses. We compared efficacy, adverse effects and cost. RESULTS Eradication rate was 74.6, 72.9, 96.4 y 91.7% for FAM, OAT, LAC1 and LAC2 respectively (p < 0.05). Direct cost ranged from US$ 50 for FAM to US$ 220 for LAC1. A decision analysis was carried out in a model including direct and indirect costs and considering retreatment with antibiotics after the first treatment failure and one-year treatment with H2-blockers in case of a second failure. FAM was selected as the most cost-effective option, with an estimated cost of about US$ 300 +/- 148 per patient. However, cost associated to LAC2 was very similar (US$ 320 +/- 58) and the lower standard deviation suggests less variation. Sensitivity analyses, considering reasonable fluctuation in parameters such as eradication rate, cost and follow-up period suggest that a regimen containing a proton pump inhibitor, clarithromycin and amoxycillin may be the most cost-effective treatment. CONCLUSIONS These results should be confirmed in other settings, specially in ordinary clinical practice, far from clinical research.
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Affiliation(s)
- A Rollán
- Depto. Gastroenterología, Facultad de Medicina, P. Universidad Católica de Chile, Santiago-Chile.
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Rollan A, Giancaspero R, Fuster F, Acevedo C, Figueroa C, Hola K, Schulz M, Duarte I. The long-term reinfection rate and the course of duodenal ulcer disease after eradication of Helicobacter pylori in a developing country. Am J Gastroenterol 2000; 95:50-6. [PMID: 10638558 DOI: 10.1111/j.1572-0241.2000.01700.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the effect of Helicobacter pylori (H. pylori) eradication on the natural history of duodenal ulcer disease and the reinfection rate after treatment in a developing country. METHODS A total of 111 H. pylori-infected patients with duodenal ulcer were treated with either omeprazole or famotidine plus two antibiotics for 2 wk. Those failed to respond to treatment were retreated with bismuth-based triple therapy. RESULTS The radication rate was 76% (95% CI: 67-83%). Eventually, H. pylori was eradicated in 96 of the 111 patients (86%), who were followed-up clinically and endoscopically for a mean of 37.2 months. The cumulative reinfection rate after eradication (Kaplan-Meier) was 8%+/-3% in yr 1, 11%+/-4% in yr 2, and 13%+/-4% in yr 3. Nine of the 12 reinfections occurred during yr 1. Recurrence of duodenal ulcer was detected in five patients (5.2%), all of them during yr 1 of follow-up. Histologically, gastritis scores (according to the Sydney system) improved significantly after eradication. CONCLUSIONS In a high prevalence setting, H. pylori eradication and early reinfection rates after treatment are similar to rates observed in a low prevalence environment, whereas the late reinfection rate seems to be higher. However, up to 3 yr after treatment, most treated patients are free of H. pylori infection and/or ulcer activity. Even longer follow-up studies are necessary to determine whether specific retreatment policies are necessary to maintain long term eradication in developing countries.
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Affiliation(s)
- A Rollan
- Department of Gastroenterology and Pathology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago
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Bengochea L, Ghanem C, Perazzo JC, Ghisolfi C, Marabotto L, Acevedo C, Mino J, Lemberg A, Rubio M. Drug glucuronidation and hepatic lipid microsomal membrane profile in cholestatic rats followed paracetamol intoxication. Pharmacol Res 1999; 40:369-76. [PMID: 10527650 DOI: 10.1006/phrs.1999.0530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The uridin-diphosphoglucuronyl-transferase (UDP-GT) is a membrane-bound enzyme responsible for glucuronidation of endogenous and exogenous compounds. This work established the UDP-GT activity and its lipid membrane microenvironment in two experimental models: acute paracetamol intoxication, and cholestasis followed by acute paracetamol intoxication. Cholestasis was performed by bile duct ligation. After 7 days animals were injected with paracetamol (BDL-APAP group). Sham-operated rats were injected at day 7 with paracetamol (APAP group). Cholestatic and sham-operated rats injected with vehicle (BDL and control groups). UDP-GT activity was measured by a kinetic method for different substrates. Microsomal membrane phospholipid composition, cholesterol content and ultrastructure were determined. BDL-APAP group showed an increment in the UDP-GT activity except for chloramphenicol, morphine and paracetamol if compared to controls and to BDL group. The same increment was observed when BDL-APAP was compared to APAP except for chloramphenicol and lorazepam. Between BDL and APAP groups similar levels of activity were detected except for paracetamol. Microsomal phospholipid profile: phosphatidylcholine showed the lowest content in the BDL group, with a significant recovery in the BDL-APAP and APAP groups. Phosphatidylserine was markedly decreased in the APAP group compared to the rest and phosphatidylinositol was decreased in all the groups if compared to control values. An increment of phosphatidylethanolamine was seen in the APAP and BDL-APAP groups if compared to BDL and control values. A significant increment of microsomal cholesterol content was seen in BDL. Under these conditions, a different lipid microenvironment is produced, resulting in an increment of the enzyme activity for a variety of substrates.
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Affiliation(s)
- L Bengochea
- Catedra de Fisiopatologia y Catedra de Farmacologia, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires, 5to piso, Junin 956, Buenos Aires, (1113), Argentina
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Hnatyszyn O, Miño J, Gorzalczany S, Opezzo J, Ferraro G, Coussio J, Acevedo C. Diuretic activity of an aqueous extract of Phyllanthus sellowianus. Phytomedicine 1999; 6:177-179. [PMID: 10439482 DOI: 10.1016/s0944-7113(99)80006-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Phyllanthus sellowianus Muell. Arg. (Euphorbiaceae) is used widely as a hypoglycemic and diuretic agent in South American folk medicine. In order to assess the diuretic activity of this plant, test animals were treated with a single oral administration of an aqueous extract (5% w/v) of the stem bark of P. sellowianus (400 mg/kg body weight), which produced after 8 h a significant increase in the urinary excretion. In the studies on acute toxicity in mice neither mortality nor neurobehavioral or autonomic profile changes could be observed.
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Affiliation(s)
- O Hnatyszyn
- Cátedra de Farmacognosia, IQUIMEFA (UBA-CONICET), Universidad de Buenos Aires, Argentina.
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Abstract
Rat liver slices were employed as experimental model to characterise the system involved in the transport process which participates in liver tyramine uptake. The uptake of 0.4 micromol l-1of [3H]tyramine by rat liver slices was linear from 5 min up to the end of incubation. At 15 min the uptake was 4.58+/-0.18 pmol mg-1protein. The accumulation of [3H]tyramine was sensitive to temperature (69. 3+/-4.0% inhibition at 0 degrees C, P<0.001), to sodium omission replaced by 150 mmol l-1Tris or 110 mmol l-1Tris+40 mmol l-1choline (27.6+/-6.0%, P<0.01, and 24.6+/-3.8% inhibition, P<0.01, respectively), and the inhibition of Na+-K+-adenosine triphosphatase by 150 micromol l-1ouabain (20.4+/-2.6% decrease, P<0.01). Uptake of [3H]tyramine was cocaine- (10 micromol l-1) and desipramine- (1 micromol l-1) dependent (32.2+/-6.4%, P<0.05, and 31.6+/-4.0% inhibition, P<0.05, respectively). Uptake of [3H]tyramine in rat liver slices was not modified by 30 micromol l-1isoprenaline, 30 micromol l-1corticosterone, 30 micromol l-1normetanephrine and noradrenaline up to 4 micrometers at higher noradrenaline concentrations tyramine transport was diminished (P<0.05). Results achieved by incubation with increasing tyramine concentrations indicate that at the micromolar level hepatic uptake occurs by a combined passive diffusion and transport-mediated mechanism, whereas at greater tyramine concentrations passive transport predominates. These results suggest that both simple diffusion and a transport-mediated mechanism are involved in this uptake from hepatocytes, which presents features similar to those described for type 1 non-neuronal uptake systems.
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Affiliation(s)
- D M Tchercansky
- Cátedra de Farmacologiá, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, Buenos Aires, Argentina
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