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Porbahaie M, Hummel A, Saouadogo H, Coelho RML, Savelkoul HFJ, Teodorowicz M, van Neerven RJJ. Short-chain fatty acids inhibit the activation of T lymphocytes and myeloid cells and induce innate immune tolerance. Benef Microbes 2023; 14:401-419. [PMID: 38661366 DOI: 10.1163/18762891-20220113] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 06/07/2023] [Indexed: 04/26/2024]
Abstract
The intestinal microbiota contributes to gut immune homeostasis, where short-chain fatty acids (SCFAs) function as the major mediators. We aimed to elucidate the immunomodulatory effects of acetate, propionate, and butyrate. With that in mind, we sought to characterise the expression of SCFA receptors and transporters as well as SCFAs' impact on the activation of different immune cells. Whereas all three SCFAs decreased tumour necrosis factor (TNF)-α production in activated T cells, only butyrate and propionate inhibited interferon (IFN)-γ, interleukin (IL)-17, IL-13, and IL-10 production. Butyrate and propionate inhibited the expression of the chemokine receptors CCR9 and CCR10 in activated T- and B-cells, respectively. Similarly, butyrate and propionate were effective inhibitors of IL-1β, IL-6, TNF-α, and IL-10 production in myeloid cells upon lipopolysaccharide and R848 stimulation. Acetate was less efficient at inhibiting cytokine production except for IFN-α. Moreover, SCFAs inhibited the production of IL-6 and TNF-α in monocytes, myeloid dendritic cells (mDC), and plasmacytoid dendritic cells (pDC), whereas acetate effects were relatively more prominent in pDCs. In monocytes and mDCs, acetate was a less efficient inhibitor, but it was equally effective in inhibiting pDCs activation. We also studied the ability of SCFAs to induce trained immunity or tolerance. Butyrate and propionate - but not acetate - prevented Toll-like receptor-mediated activation in SCFA-trained cells, as demonstrated by a reduced production of IL-6 and TNF-α. Our findings indicate that butyrate and propionate are equally efficient in inhibiting the adaptive and innate immune response and did not induce trained immunity. The findings may be explained by differential SCFA receptor and transporter expression profiles of the immune cells.
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Affiliation(s)
- M Porbahaie
- Cell Biology and Immunology, Wageningen University & Research, De Elst 1, 6700 HB Wageningen, the Netherlands
| | - A Hummel
- Cell Biology and Immunology, Wageningen University & Research, De Elst 1, 6700 HB Wageningen, the Netherlands
| | - H Saouadogo
- Cell Biology and Immunology, Wageningen University & Research, De Elst 1, 6700 HB Wageningen, the Netherlands
| | - R M L Coelho
- Cell Biology and Immunology, Wageningen University & Research, De Elst 1, 6700 HB Wageningen, the Netherlands
| | - H F J Savelkoul
- Cell Biology and Immunology, Wageningen University & Research, De Elst 1, 6700 HB Wageningen, the Netherlands
| | - M Teodorowicz
- Cell Biology and Immunology, Wageningen University & Research, De Elst 1, 6700 HB Wageningen, the Netherlands
| | - R J J van Neerven
- Cell Biology and Immunology, Wageningen University & Research, De Elst 1, 6700 HB Wageningen, the Netherlands
- FrieslandCampina, Stationsplein 4, 3818 LE Amersfoort, the Netherlands
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Dao M, Decramer S, Llanas B, Chauveau D, Nobili F, Ranchin B, Rieu P, Knebelmann B, Hummel A, Servais A. Devenir à l’âge adulte des patients suivis pour un syndrome de Lowe. Nephrol Ther 2022. [DOI: 10.1016/j.nephro.2022.07.194] [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: 10/14/2022]
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Casal Moura M, Deng Z, Brooks S, Tew W, Hummel A, Fervenza F, Kallenberg C, Langford C, Merkel PA, Monach PA, Seo P, Spiera R, St. Clair W, Stone JH, Prunotto M, Grayson P, Specks U. POS0244 ASSOCIATION OF PROTEINASE 3 GENE (PRTN3) Val119Ile POLYMORPHISM (SNP rs351111) WITH RISK OF RELAPSE AMONG HOMOZYGOUS PATIENTS WITH PR3 ANCA-ASSOCIATED VASCULITIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundThe frequency of the proteinase 3 gene (PRTN3) polymorphisms in patients with ANCA-associated vasculitis (AAV) is not well characterized. We hypothesize that PRTN3 gene polymorphisms induce allosteric changes in PR3 conformation which may alter its interaction with ligands and PR3-ANCA during inflammation with potential implications for disease presentation and clinical outcomes.ObjectivesTo analyze the association of PRTN3 Val119Ile polymorphism (SNP rs351111) with risk of relapse risk among homozygous patients with PR3 ANCA-associated vasculitis.MethodsDNA variant calling for SNP rs351111 (chr.19:844020, c.355G>A) in PRTN3 gene assessed the allelic frequency in patients with PR3-AAV included in the Rituximab versus Cyclophosphamide (RAVE) trial. This was followed by RNA-seq variant calling to characterize the mRNA expression. We compared clinical presentation and outcomes between patients homozygous for PR3-Ile119 or PR3-Val119.ResultsSerum samples for DNA calling were available in 188 of the 197 patients with AAV in the RAVE cohort. 75 PR3-AAV patients had the allelic variant: 13 patients were homozygous for PR3-Ile119 and 62 patients were heterozygous PR3-Val119Ile with an allele frequency threshold of 29.3 – 55.1% of reads (Figure 1A and 1B). RNA-seq was available for 89 patients and the mRNA corresponding to the allelic variant was found in 35 PR3-AAV patients: 13 patients were homozygous for PR3-Ile119 and 22 patients were heterozygous PR3-Val119Ile with an allele frequency threshold of 11.1 – 62.8% of reads (Figure 1A and 1C). The agreement between the DNA calling results and the mRNA expression of the 86 patients that overlapped was 100%. We found an additional homozygous patient for PR3-Val119 in which blood was not available for DNA calling. We compared the clinical presentation and outcomes of 74 patients with PR3-AAV: 13 homozygous for PR3-Ile119 and 51 homozygous for PR3-Val119 (Table 1). The frequency of severe flares at 18 months in homozygous PR3-Ile119 was ≥ 2x higher when compared with homozygous PR3-Val119 (46.2% vs. 19.6%, p=0.048). We found no differences in clinical presentation.Figure 1.RAVE trial population distribution according to the zygosity status for PRTN3 gene (PR3 and MPO-ANCA patients) and DNA or RNA variant calling (panel A). Allelic frequency for rs351111, chr.19:844020 (c.355G>A) in PRTN3 among patients with AAV (PR3 and MPO-ANCA) in the DNA (panel B) and RNA (panel C) variant calling.Table 1.Outcomes of patients with PR3-ANCA according with PRTN3 zygosity.PR3-ANCA (n=64)Homozygous PR3-Val119(n=51)HomozygousPR3-Ile119(n=13)p-value Remission, n (%)45 (88.2)13 (100)0.194 Complete remission, n (%)36 (70.6)10 (76.9)0.650 Any flare 18 months, n (%)30 (58.8)7 (53.8)0.746 Severe Relapse* 18 months, n (%)10 (19.6)6 (46.2)0.048* Relapse was considered “Severe” if Birmingham Vasculitis Activity Score for Wegener’s Granulomatosis (BVAS/WG) > 3 or one major item as per the RAVE trial definition.Abbreviations: ANCA - anti-neutrophil cytoplasmic antibody; Ile – isoleucine; n- number; PR3 - proteinase 3; Val - valine.ConclusionIn patients with PR3-AAV the presence of PRTN3 Val119Ile polymorphism was associated with higher frequency of severe relapse. Further studies are necessary to understand the association of this observation with the risk of severe relapse.References[1]Stone JH et al N Engl J Med 2010; 363:221-232Disclosure of InterestsNone declared
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Jourde-Chiche N, Costedoat-Chalumeau N, Baumstarck K, Bouillet L, Burtey S, Caudwell V, Chiche L, Couzi L, Deligny C, Dussol B, Faguer S, Gobert P, Gondran G, Huart A, Hummel A, Kalbacher E, Karras A, Lambert M, Le Guern V, Loubiere S, Maillard H, Maurier F, Pha M, Queyrel V, Sarrot-Reynauld F, Verhelst D, Hachulla E, Amoura Z, Daugas E. OP0280 WEANING OF MAINTENANCE IMMUNOSUPPRESSIVE THERAPY IN LUPUS NEPHRITIS (WIN-Lupus): A MULTICENTER RANDOMIZED CONTROLLED TRIAL. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundLupus nephritis (LN) is a frequent complication of systemic lupus erythematosus (SLE). Severe (proliferative) forms of LN are treated with an induction immunosuppressive therapy (IST), followed by a maintenance IST, to target remission and avoid relapses. The optimal duration of maintenance IST for proliferative LN is unknown.ObjectivesThe WIN-Lupus trial tested whether IST discontinuation after 2-3 years in proliferative LN was non-inferior to IST continuation for 2 more years.MethodsWIN-Lupus is an investigator-initiated academic randomized controlled trial, conducted in 28 French centers. Patients on maintenance IST with azathioprine or mycophenolate mofetil for a minimum of 2 years and a maximum of 3 years, and who were taking Hydroxychloroquine, were randomized (1:1) between 2 groups: IST continuation and IST discontinuation. The primary endpoint was the relapse rate of proliferative LN at 24 months. Secondary endpoints were the rate of severe SLE flares, survival without renal relapse or severe flare, adverse events, kidney function, disease activity, corticosteroid exposure, patient-reported outcome and medico-economic impact.ResultsBetween 2011 and 2016, 125 patients were screened and 96 were randomized in the trial: 48 in the IST continuation group, 48 in the IST discontinuation group. In the per-protocol population, a relapse of proliferative LN occurred in 5/40 (10.4%) patients with IST continuation, and in 12/44 (25%) patients with IST discontinuation (difference 14.8%, 95%CI [-1.9; 31.5]). Non-inferiority was not demonstrated for relapse rate. Time to renal relapse did not differ between groups (p=0.092). Severe SLE flares (renal or extra-renal) were less frequent in patients with IST continuation compared to IST discontinuation (5/40 vs 14/44 patients, p=0.035). IST discontinuation was associated with lower health-related costs. Adverse events did not differ between groups.ConclusionNon-inferiority of maintenance IST discontinuation after 2 to 3 years was not demonstrated for renal relapse. IST discontinuation was associated with a higher risk of severe SLE flare.References[1]Moroni G et al. When and how is it possible to stop therapy in patients with lupus nephritis? Clin J Am Soc Nephrol. 2021. CJN.04830421. doi: 10.2215/CJN.04830421.[2]Fanouriakis A et al. 2019 Update of the Joint European League Against Rheumatism and European Renal Association-European Dialysis and Transplant Association (EULAR/ERA-EDTA) recommendations for the management of lupus nephritis. Ann Rheum Dis. 2020;79(6):713-723.[3]Jourde-Chiche N et al. Proliferative lupus nephritis treatment: practice survey in nephrology and internal medicine in France. Nephrol Ther. 2014;10(3):170-6.[4]Zen M et al. Immunosuppressive therapy withdrawal after remission achievement in patients with lupus nephritis. Rheumatology (Oxford). 2021;keab373. doi: 10.1093/rheumatology/keab373.[5]Malvar A et al. Kidney biopsy-based management of maintenance immunosuppression is safe and may ameliorate flare rate in lupus nephritis. Kidney Int. 2020;97(1):156-162.AcknowledgementsGroupe Coopératif sur le Lupus Rénal (GCLR)Disclosure of InterestsNoemie JOURDE-CHICHE Speakers bureau: Vifor Pharma, Grant/research support from: Fresenius Medical Care: grant paid to my institution (AP-HM) for the CINEVAS study in ANCA-associated vasculitis, Nathalie Costedoat-Chalumeau Grant/research support from: AP-HP received a research support from ROCHE for the OBILUP trial, Karine Baumstarck: None declared, LAURENCE BOUILLET Speakers bureau: GSK, novartis, biocryst, takeda, behring, Paid instructor for: takeda, novartis, Consultant of: GSK, novartis, biocryst, takeda, behring, blueprint, Grant/research support from: takeda, gsk, sanofi, biocryst, novartis, Stéphane Burtey: None declared, Valerie Caudwell: None declared, Laurent Chiche Speakers bureau: BMS, Paid instructor for: BMS, Lionel Couzi Speakers bureau: Astellas, Chiesi, Novartis, Sandoz, Ostuka, GSK, Biotest, Consultant of: Biotest, Hansa, Novartis, Grant/research support from: Novartis, Astellas, Christophe DELIGNY: None declared, Bertrand Dussol Speakers bureau: Genzyme, Novonordisk, Grant/research support from: Shire, Stanislas Faguer Speakers bureau: Asahi, Vifor Pharma, Sanofi, Consultant of: Abyonyx Pharma, Pierre Gobert: None declared, Guillaume Gondran Speakers bureau: Pfizer, Novartis, Consultant of: Genzyme, Antoine Huart Speakers bureau: Janssen, Paid instructor for: Pfizer, Aurélie Hummel: None declared, Emilie Kalbacher: None declared, Alexandre Karras Speakers bureau: Vifor, GSK, Astra-Zeneca, Roche, Paid instructor for: Vifor, Sanofi, Alexion, Consultant of: Novartis, GSK, Bohringer-Ingelheim, Marc Lambert Speakers bureau: CHUGAI-ROCHE, BAYER, PFIZER, LEOPHARMA, Paid instructor for: CHUGAI-ROCHE, Consultant of: CHUGAI-ROCHE, BAYER, PFIZER, LEOPHARMA, Grant/research support from: CHUGAI-ROCHE, Véronique LE GUERN: None declared, Sandrine Loubiere: None declared, Helene Maillard: None declared, Francois Maurier: None declared, Micheline Pha: None declared, Viviane Queyrel Paid instructor for: GSK, Consultant of: Boehringer Ingelheim, Francoise Sarrot-Reynauld: None declared, David Verhelst: None declared, Eric Hachulla Speakers bureau: Johnson & Johnson, GSK, Roche-Chugai, Consultant of: Johnson & Johnson, Boehringer Ingelheim, Bayer, GSK, Roche-Chugai, Sanofi-Genzyme, Grant/research support from: CSL Behring, GSK, Roche-Chugai and Johnson & Johnson, Zahir Amoura Speakers bureau: GSK, CSL Behring, Consultant of: GSK, Grant/research support from: GSK, Eric Daugas Speakers bureau: GSK, Amgen, Paid instructor for: GSK, Astra Zeneca, Consultant of: GSK, Astra Zeneca, Amgen, Grant/research support from: ROCHE for the OBILUP trial (AP-HP)
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Marty PK, Van Keulen VP, Erskine CL, Shah M, Hummel A, Stachowitz M, Fatis S, Granger D, Block MS, Duarte-García A, Warrington KJ, Theel ES, Zhou X, Zeng H, Specks U, Escalante P, Peikert T. Antigen Specific Humoral and Cellular Immunity Following SARS-CoV-2 Vaccination in ANCA-Associated Vasculitis Patients Receiving B-Cell Depleting Therapy. Front Immunol 2022; 13:834981. [PMID: 35154159 PMCID: PMC8831839 DOI: 10.3389/fimmu.2022.834981] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [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: 12/14/2021] [Accepted: 01/07/2022] [Indexed: 12/25/2022] Open
Abstract
Humoral vaccine responses are known to be suboptimal in patients receiving B-cell targeted therapy, and little is known about vaccine induced T-cell immunity in these patients. In this study, we characterized humoral and cellular antigen-specific anti-SARS-CoV2 responses following COVID-19 vaccination in patients with ANCA-associated vasculitis (AAV) receiving anti-CD20 therapy, who were either B-cell depleted, or B-cell recovered at the time of vaccination and in normal control subjects. SARS-CoV-2 anti-spike (S) and anti-nucleocapsid (NC) antibodies were measured using electrochemiluminescence immunoassays, while SARS-CoV-2 specific T-cell responses to S glycoprotein subunits 1 (S1) and 2 (S2) and receptor binding domain peptide pools were measured using interferon-gamma enzyme-linked immunosorbent spot (ELISPOT) assays. In total, 26 recently vaccinated subjects were studied. Despite the lack of a measurable humoral immune response, B-cell depleted patients mounted a similar vaccine induced antigen-specific T-cell response compared to B-cell recovered patients and normal controls. Our data indicate that to assure a humoral response in patients receiving anti-CD20 therapy, SARS-CoV-2 vaccination should ideally be delayed until B-cell recovery (CD-20 positive B-cells > 10/μl). Nevertheless, SARS-CoV-2 vaccination elicits robust, potentially protective cellular immune responses in these subjects. Further research to characterize the durability and protective effect of vaccine-induced anti-SARS-CoV-2 specific T-cell immunity are needed.
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Affiliation(s)
- Paige K. Marty
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Virginia P. Van Keulen
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
- Department of Immunology, Mayo Clinic, Rochester, MN, United States
| | - Courtney L. Erskine
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
- Department of Immunology, Mayo Clinic, Rochester, MN, United States
| | - Maleeha Shah
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Amber Hummel
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Michael Stachowitz
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Samantha Fatis
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Dane Granger
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - Matthew S. Block
- Department of Immunology, Mayo Clinic, Rochester, MN, United States
- Department of Oncology, Mayo Clinic, Rochester, MN, United States
| | - Alí Duarte-García
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Kenneth J. Warrington
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Elitza S. Theel
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, United States
| | - Xian Zhou
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Hu Zeng
- Department of Immunology, Mayo Clinic, Rochester, MN, United States
- Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Ulrich Specks
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Patricio Escalante
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
| | - Tobias Peikert
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, United States
- Department of Immunology, Mayo Clinic, Rochester, MN, United States
- *Correspondence: Tobias Peikert,
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Vergneault H, Chauvin A, Savale L, Galicier L, Costedoat-Chalumeau N, Le Guern V, Saadoun D, Hummel A, Mouthon L, Sitbon O, Régent A. Effet du traitement immunosuppresseur et du traitement spécifique dans l’HTAP associée au lupus érythémateux systémique. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.10.225] [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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Hummel A, VanderWal C, Wickens E. The Healthy Eating Index: Comparison of School Lunch Before and During COVID-19. J Acad Nutr Diet 2021. [DOI: 10.1016/j.jand.2021.06.185] [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: 10/20/2022]
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Berti A, Hillion S, Hummel A, Carmona E, Peikert T, Langford C, Merkel PA, Monach P, Seo P, Spiera R, St Clair EW, Fervenza F, Harris K, Stone JH, Pers JO, Specks U, Cornec D. THU0040 PROTEINASE 3-REACTIVE B CELL RECONSTITUTION AFTER TREATMENT WITH RITUXIMAB FOR ANCA-ASSOCIATED VASCULITIS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Proteinase 3 (PR3)-reactive B cells are present in PR3-ANCA-associated vasculitis (AAV) at levels higher than healthy controls.Objectives:To evaluate the dynamics of the PR3-reactive B cell repopulation in patients with PR3-AAV after treatment with rituximab, and to analyze possible associations between these immunological changes and long-lasting remissions.Methods:We analyzed all available frozen peripheral blood mononuclear cells (n=148) from 23 randomly-selected PR3-AAV patients who participated in the RAVE trial and achieved complete remission (BVAS=0, prednisone=0) after treatment with rituximab.We measured PR3-reactive B cells and the relative subsets by a multi-color flow cytometry panel including CD19, IgD, CD27, CD38, CD24, and a biotinylated PR3 revealed by fluorescent streptavidin. The clinical data of the trial were correlated with flow-cytometry data.Results:10/23 (43%) patients relapsed during the follow up, 8/10 relapses were severe. At baseline, clinical features, PR3-ANCA levels, % of total PR3-reactive B cells and PR3-reactive B cell subsets were similar between relapsers and non-relapsers. All patients were followed until the end of the trial, for a mean of 44 months (25-75%IQR 31-54), without difference in follow-up time between relapsers and non-relapsers (p=0.98).The majority of patients had B cell repopulation at 12 (range 12-24) months after rituximab. At the time of B cell repopulation, transitional (CD19+CD24+CD38+) and naïve (CD19+CD27+IgD-) B cells were higher compared to baseline, while total plasmablasts (PB) were unchanged, and mature B cells significantly decreased in both relapsers and non relapsers. PR3-reactive B cells reappeared in all the patients, and the % of PR3-reactive of B cells were higher at the B cell repopulation visit compared to baseline (5.82% vs 4.25%, p<0.05), while total B cells were lower (66/μL vs 151/μL, p<0.01), regardless of future relapse.Within PR3-reactive B cells, only the % of PB (CD19+CD27+CD38+PR3+) were higher in relapsers vs. non-relapsers (median [25-75%IQR]; 1.95% [1.315-3.845] vs 0.84% [0.05-1.66], p=0.022) and severe relapsers vs non-severe relapsers (2.165% [1.66-4.315] vs 0.84% [0.1-1.74], p=0.015). Time-to-relapse and time-to severe-relapse were significantly shorter in patients with circulating PR3-PB higher than the median value of the cohort (1.6%) during B cell reconstitution (Figure 1A-B).Conclusion:In PR3-AAV, during B cell reconstitution after rituximab, the total fraction of PR3-B cells increases, due to the expansion of the transitional and naïve B cell compartments. Circulating PR3-PB within PR3-B cells are enriched in the peripheral blood of relapsing and severely relapsing patients compared to non-relapsing patients. Higher levels of PR3-PB after rituximab during B cell reappearance significantly increased the risk of subsequent relapse and severe relapse.References:[1]Cornec D, Berti A, Hummel A, et al. J Autoimmun. 2017Disclosure of Interests:Alvise Berti: None declared, Sophie Hillion: None declared, Amber Hummel: None declared, Eva Carmona: None declared, Tobias Peikert: None declared, Carol Langford: None declared, Peter A. Merkel: None declared, Paul Monach: None declared, Philip Seo: None declared, Robert Spiera Grant/research support from: Roche-Genetech, GSK, Boehringer Ingelheim, Chemocentryx, Corbus, Forbius, Sanofi, Inflarx, Consultant of: Roche-Genetech, GSK, CSL Behring, Sanofi, Janssen, Chemocentryx, Forbius, Mistubishi Tanabe, E. William St. Clair: None declared, Fernando Fervenza: None declared, Kristina Harris: None declared, John H. Stone Grant/research support from: Roche, Consultant of: Roche, Jacques-Olivier Pers: None declared, Ulrich Specks: None declared, Divi Cornec: None declared
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Terrier B, London J, Bonnet F, Cerruti D, Costedoat-Chalumeau N, Diot E, Ferfar Y, Hummel A, Kaplanski G, Marie I, Quéméneur T, Rullier P, Senet P, Le Gouellec N, David S, Cacoub P. Comparaison des glucocorticoïdes plus rituximab versus glucocorticoïdes plus placebo dans le traitement des vascularites cryoglobulinémiques mixtes actives non infectieuses : résultats d’un essai randomisé contrôlé en double aveugle. Rev Med Interne 2019. [DOI: 10.1016/j.revmed.2019.10.051] [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: 10/25/2022]
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Thompson G, Fussner L, Hummel A, Schroeder D, Silva F, Snyder M, Kallenberg C, Langford C, Merkel P, Monach P, Seo P, Spiera R, Clair EWS, Stone J, Specks U. 053. CLINICAL UTILITY OF SERIAL MEASUREMENTS OF ANTINEUTROPHIL CYTOPLASMIC ANTIBODIES TARGETING PROTEINASE 3 IN ANCA-ASSOCIATED VASCULITIS. Rheumatology (Oxford) 2019. [DOI: 10.1093/rheumatology/kez057.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - Lynn Fussner
- The Ohio State University Davis Heart-Lung Research Institute Columbus, OH USA
| | | | | | | | | | | | | | | | - Paul Monach
- Boston University Medical Center Boston, MA USA
| | - Philip Seo
- Johns Hopkins University Baltimore, MD USA
| | | | | | - John Stone
- Massachusetts General Hospital Boston, MA USA
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Thompson G, Moura MC, Nelson D, Fussner L, Hummel A, Jenne D, Fervenza F, Hoffman G, Kallenberg C, Langford C, McCune J, Merkel P, Monach P, Seo P, Spiera R, Clair EWS, Ytterberg S, Stone J, Robinson W, Pang YP, Specks U. 222. PREFERENTIAL BINDING TO AN UNEXPECTED EPITOPE OF A CHIMERIC RECOMBINANT PROTEINASE 3 VARIANT BY ANTI-NEUTROPHIL CYTOPLASMIC ANTIBODIES. Rheumatology (Oxford) 2019. [DOI: 10.1093/rheumatology/kez061.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | | | | | - Lynn Fussner
- The Ohio State University 201 Davis Heart-Lung Research Institute Columbus, OH USA
| | | | | | | | | | | | | | | | | | - Paul Monach
- Boston University Medical Center Boston, MA USA
| | - Philip Seo
- Johns Hopkins University Baltimore, MD USA
| | | | | | | | - John Stone
- Massachusetts General Hospital Boston, MA USA
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Cornec D, Berti A, Hummel A, Carmona E, Peikert T, Langford C, Monach P, Merkel P, Seo P, Spiera R, Clair EWS, Fervenza F, Harris K, Stone J, Pers JO, Heeringa P, Abdullahad W, Specks U. 190. DETECTION OF CIRCULATING PR3-SPECIFIC B CELLS IN PATIENTS WITH ACTIVE ANCA-ASSOCIATED VASCULITIS. Rheumatology (Oxford) 2019. [DOI: 10.1093/rheumatology/kez061.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | | | | | | | | | - Paul Monach
- Boston University and VA Boston Health Boston, MA USA
| | | | - Philip Seo
- Johns Hopkins University Baltimore, MD USA
| | | | | | | | | | - John Stone
- Massachusetts General Hospital Boston, MA USA
| | | | - Peter Heeringa
- University Medical Center Groningen Groningen, Netherlands
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Colliou E, Karras A, Boffa J, Jourde-Chiche N, Lequintrec M, Demoulin N, Ducloux D, Hummel A, Audard V, Faguer S. Pronostic des syndromes néphrotiques idiopathiques du sujet âgé : étude rétrospective multicentrique. Nephrol Ther 2018. [DOI: 10.1016/j.nephro.2018.07.079] [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: 11/30/2022]
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Baschin M, Selleng S, Hummel A, Diedrich S, Schroeder HW, Kohlmann T, Westphal A, Greinacher A, Thiele T. Preoperative platelet transfusions to reverse antiplatelet therapy for urgent non-cardiac surgery: an observational cohort study. J Thromb Haemost 2018; 16:709-717. [PMID: 29383871 DOI: 10.1111/jth.13962] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 08/22/2017] [Indexed: 01/22/2023]
Abstract
Essentials An increasing number of patients requiring surgery receive antiplatelet therapy (APT). We analyzed 181 patients receiving presurgery platelet transfusions to reverse APT. No coronary thrombosis occurred after platelet transfusion. This justifies a prospective trial to test preoperative platelet transfusions to reverse APT. SUMMARY Background Patients receiving antiplatelet therapy (APT) have an increased risk of perioperative bleeding and cardiac adverse events (CAE). Preoperative platelet transfusions may reduce the bleeding risk but may also increase the risk of CAE, particularly coronary thrombosis in patients after recent stent implantation. Objectives To analyze the incidence of perioperative CAE and bleeding in patients undergoing non-cardiac surgery using a standardized management of transfusing two platelet concentrates preoperatively and restart of APT within 24-72 h after surgery. Methods A cohort of consecutive patients on APT treated with two platelet concentrates before non-cardiac surgery between January 2012 and December 2014 was retrospectively identified. Patients were stratified by the risk of major adverse cardiac and cerebrovascular events (MACCE). The primary objective was the incidence of CAE (myocardial infarction, acute heart failure and cardiac troponine T increase). Secondary objectives were incidences of other thromboembolic events, bleedings, transfusions and mortality. Results Among 181 patients, 88 received aspirin, 21 clopidogrel and 72 dual APT. MACCE risk was high in 63, moderate in 103 and low in 15 patients; 67 had cardiac stents. Ten patients (5.5%; 95% CI, 3.0-9.9%) developed a CAE (three myocardial infarctions, four cardiac failures and three troponin T increases). None was caused by coronary thrombosis. Surgery-related bleeding occurred in 22 patients (12.2%; 95% CI, 8.2-17.7%), making 12 re-interventions necessary (6.6%; 95% CI, 3.8-11.2%). Conclusion Preoperative platelet transfusions and early restart of APT allowed urgent surgery and did not cause coronary thromboses, but non-thrombotic CAEs and re-bleeding occurred. Randomized trials are warranted to test platelet transfusion against other management strategies.
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Affiliation(s)
- M Baschin
- Abteilung Transfusionsmedizin, Institut für Immunologie und Transfusionsmedizin, Greifswald, Germany
| | - S Selleng
- Klinik für Anästhesiologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - A Hummel
- Klinik und Poliklinik für Innere Medizin B, Universitätsmedizin Greifswald, Greifswald, Germany
| | - S Diedrich
- Klinik und Poliklinik für Chirurgie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - H W Schroeder
- Klinik für Neurochirurgie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - T Kohlmann
- Institut für Community Medicine, Universitätsmedizin Greifswald, Greifswald, Germany
| | - A Westphal
- Abteilung Transfusionsmedizin, Institut für Immunologie und Transfusionsmedizin, Greifswald, Germany
| | - A Greinacher
- Abteilung Transfusionsmedizin, Institut für Immunologie und Transfusionsmedizin, Greifswald, Germany
| | - T Thiele
- Abteilung Transfusionsmedizin, Institut für Immunologie und Transfusionsmedizin, Greifswald, Germany
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Sakhi H, Rabant M, Karras A, Hummel A, Nochy D, Zaidan M. Les GEM monotypiques : une forme rare de MGRS. Nephrol Ther 2017. [DOI: 10.1016/j.nephro.2017.08.073] [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: 11/17/2022]
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16
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Joher N, Guerrot D, Hummel A, Faguer S, Boffa J, Delmas Y, Gosset C, Pillebout E, Karras A, El Karoui K. Glomérulonéphrites à IgA associées aux maladies inflammatoires chroniques de l’intestin : présentation clinicobiologique et pronostic. Nephrol Ther 2017. [DOI: 10.1016/j.nephro.2017.08.195] [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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17
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Hummel A, Porz R. Das Denkparadigma der Forschungsethik. physioscience 2017. [DOI: 10.1055/s-0035-1567215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- A. Hummel
- Berner Fachhochschule (BFH), Fachbereich Gesundheit, Bern, Schweiz
| | - R. Porz
- Fachstelle für Klinische Ethik, Inselspital, Bern, Schweiz
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Oommen E, Hummel A, Allmannsberger L, Cuthbertson D, Carette S, Pagnoux C, Hoffman GS, Jenne DE, Khalidi NA, Koening CL, Langford CA, McAlear CA, Moreland L, Seo P, Sreih A, Ytterberg SR, Merkel PA, Specks U, Monach PA. IgA antibodies to myeloperoxidase in patients with eosinophilic granulomatosis with polyangiitis (Churg-Strauss). Clin Exp Rheumatol 2017; 35 Suppl 103:98-101. [PMID: 28281453 PMCID: PMC5514423] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 12/06/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVES To determine the prevalence of anti-myeloperoxidase (MPO) antibodies of IgA (IgA anti-MPO) isotype in patients with eosinophilic granulomatosis with polyangiitis (EGPA), and the association of the IgA antibodies with IgG anti-MPO and with disease activity. METHODS Serum samples from patients with EGPA followed in a multicenter longitudinal cohort were tested by ELISA for the presence of IgA anti-MPO and IgG anti-MPO antibodies. Sera from 87 healthy controls were used to define a positive test. Sera from 168 patients with EGPA (298 samples) were tested. Frequencies of positive testing for IgA anti-MPO were compared between patients with active EGPA, patients in remission, and controls. RESULTS IgA anti-MPO was detected in 10 of 168 (6%) patients with EGPA (11 of 298 serum samples) compared to 1 of 87 (1%) healthy controls (p=0.10). All 11 samples testing positive for IgA anti-MPO also tested positive for IgG anti-MPO. Ninety samples tested positive for IgG anti-MPO but negative for IgA. Samples taken during active EGPA were positive for IgA anti-MPO in 6/72 cases (8%), compared to 5/226 (2%) during remission (p=0.03). Among samples taken during moderate or high disease activity, 5/41 were positive (12%, p=0.01 compared to remission). CONCLUSIONS Although IgA anti-MPO antibodies are detectable in some patients with EGPA and may be detectable more frequently during active disease, their presence seems unlikely to provide information beyond what is obtained from conventional IgG anti-MPO.
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Affiliation(s)
- Esha Oommen
- Section of Rheumatology, Boston University School of Medicine, Boston, MA; and Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Amber Hummel
- Division of Pulmonology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | | | | | - Simon Carette
- Division of Rheumatology, Mount Sinai Hospital, Toronto, ON, Canada
| | | | - Gary S Hoffman
- Center for Vasculitis Care and Research, Cleveland Clinic, Cleveland, OH, USA
| | | | - Nader A Khalidi
- Division of Rheumatology, St. Joseph's Healthcare, McMaster University, Hamilton, ON, Canada
| | - Curry L Koening
- Division of Rheumatology, University of Utah, Salt Lake City, UT, USA
| | - Carol A Langford
- Center for Vasculitis Care and Research, Cleveland Clinic, Cleveland, OH, USA
| | - Carol A McAlear
- Division of Rheumatology and Clinical Immunology, University of Pennsylvania, Philadelphia, PA, USA
| | - Larry Moreland
- Division of Rheumatology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Philip Seo
- Division of Rheumatology, Johns Hopkins University, Baltimore, MD, USA
| | - Antoine Sreih
- Division of Rheumatology and Clinical Immunology, University of Pennsylvania, Philadelphia, PA, USA
| | - Steven R Ytterberg
- Division of Rheumatology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Peter A Merkel
- Division of Rheumatology and Clinical Immunology, University of Pennsylvania, Philadelphia, PA, USA
| | - Ulrich Specks
- Division of Pulmonology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Paul A Monach
- Section of Rheumatology, Boston University School of Medicine; and Rheumatology Section, VA Boston Healthcare System, Boston, MA, USA.
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Hummel A, Porz R. Brauchen wir mehr als einen Informed Consent? – Ethische Herausforderungen in der PhysiotherapieforschungQualitative Studie zur Wahrnehmung von ethischen Herausforderungen der Physiotherapieforschung in der Schweiz. physioscience 2016. [DOI: 10.1055/s-0035-1567137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- A. Hummel
- Berner Fachhochschule (BFH), Fachbereich Gesundheit, CH-Bern
| | - R. Porz
- Fachstelle für Klinische Ethik, Inselspital Bern, Inselgruppe AG, CH-Bern
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Kellner S, Beug D, Empen K, Felix SB, Hummel A. [From myxomas of the skin to LVAD implantation : A 28-year-old female patient with Carney complex]. Internist (Berl) 2016; 57:927-33. [PMID: 27364495 DOI: 10.1007/s00108-016-0093-z] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Multiple skin lesions, endocrine dysfunction and cardiac myxomas are characteristic symptoms of Carney complex. This case report gives an overview about the major and minor criteria of Carney complex and presents the course of a female patient who developed severe cardiac insufficiency with multiple organ failure because of recurring heart operations leading to implantation of a left ventricular assist device (LVAD).
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Affiliation(s)
- S Kellner
- Medizinische Klinik für Innere Medizin B, Universitätsmedizin Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Deutschland.
| | - D Beug
- Medizinische Klinik für Innere Medizin B, Universitätsmedizin Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Deutschland
| | - K Empen
- Medizinische Klinik für Innere Medizin B, Universitätsmedizin Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Deutschland
| | - S B Felix
- Medizinische Klinik für Innere Medizin B, Universitätsmedizin Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Deutschland
| | - A Hummel
- Medizinische Klinik für Innere Medizin B, Universitätsmedizin Greifswald, Ferdinand-Sauerbruch-Straße, 17475, Greifswald, Deutschland
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21
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Mathian A, Arnaud L, Adoue D, Agard C, Bader-Meunier B, Baudouin V, Belizna C, Bonnotte B, Boumedine F, Chaib A, Chauchard M, Chiche L, Daugas E, Ghali A, Gobert P, Gondran G, Guettrot-Imbert G, Hachulla E, Hamidou M, Haroche J, Hervier B, Hummel A, Jourde-Chiche N, Korganow AS, Kwon T, Le Guern V, Le Quellec A, Limal N, Magy-Bertrand N, Marianetti-Guingel P, Martin T, Martin Silva N, Meyer O, Miyara M, Morell-Dubois S, Ninet J, Pennaforte JL, Polomat K, Pourrat J, Queyrel V, Raymond I, Remy P, Sacre K, Sibilia J, Viallard JF, Viau Brabant A, Hanslik T, Amoura Z. Prévention des infections au cours du lupus systémique chez l’adulte et l’adolescent : élaboration de recommandations pour la pratique clinique, à partir d’une analyse de la littérature et de l’avis d’experts. Rev Med Interne 2016; 37:307-20. [DOI: 10.1016/j.revmed.2016.01.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 01/03/2016] [Accepted: 01/05/2016] [Indexed: 12/21/2022]
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Kuon E, Weitmann K, Hoffmann W, Dörr M, Hummel A, Busch MC, Felix SB, Empen K. Role of Experience, Leadership and Individual Protection in the Cath Lab--A Multicenter Questionnaire and Workshop on Radiation Safety. ROFO-FORTSCHR RONTG 2015; 187:899-905. [PMID: 26062173 DOI: 10.1055/s-0034-1399662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE Radiation exposure in invasive cardiology remains considerable. We evaluated the acceptance of radiation protective devices and the role of operator experience, team leadership, and technical equipment in radiation safety efforts in the clinical routine. MATERIALS AND METHODS Cardiologists (115 from 27 centers) answered a questionnaire and documented radiation parameters for 10 coronary angiographies (CA), before and 3.1 months after a 90-min. mini-course in radiation-reducing techniques. RESULTS Mini-course participants achieved significant median decreases in patient dose area products (DAP: from 26.6 to 13.0 Gy × cm(2)), number of radiographic frames (-29%) and runs (-8%), radiographic DAP/frame (-2%), fluoroscopic DAP/s (-39%), and fluoroscopy time (-16%). Multilevel analysis revealed lower DAPs with decreasing body mass index (-1.4 Gy × cm(2) per kg/m(2)), age (-1.2 Gy × cm(2)/decade), female sex (-5.9 Gy × cm(2)), participation of the team leader (-9.4 Gy × cm(2)), the mini-course itself (-16.1 Gy × cm(2)), experience (-0.7 Gy × cm(2)/1000 CAs throughout the interventionalist's professional life), and use of older catheterization systems (-6.6 Gy × cm(2)). Lead protection included apron (100%), glass sheet (95%), lengthwise (94%) and crosswise (69%) undercouch sheet, collar (89%), glasses (28%), cover around the patients' thighs (19%), foot switch shield (7%), gloves (3%), and cap (1%). CONCLUSION Radiation-protection devices are employed less than optimally in the clinical routine. Cardiologists with a great variety of interventional experience profited from our radiation safety workshop - to an even greater extent if the interventional team leader also participated. KEY POINTS Radiation protection devices are employed less than optimally in invasive cardiology. The presented radiation-safety mini-course was highly efficient. Cardiologists at all levels of experience profited from the mini-course - considerably more so if the team leader also took part. Interventional experience was less relevant for radiation reduction. Consequently both fellows and trainers should be encouraged to practice autonomy in radiation safety.
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Affiliation(s)
- E Kuon
- Division of Cardiology, Klinik Fraenkische Schweiz, Ebermannstadt, Germany
| | - K Weitmann
- Institute for Community Medicine, University Medicine, Greifswald, Germany
| | - W Hoffmann
- Institute for Community Medicine, University Medicine, Greifswald, Germany
| | - M Dörr
- Division of Internal Medicine, University Medicine, Greifswald, Germany
| | - A Hummel
- Division of Internal Medicine, University Medicine, Greifswald, Germany
| | - M C Busch
- Division of Internal Medicine, University Medicine, Greifswald, Germany
| | - S B Felix
- Division of Internal Medicine, University Medicine, Greifswald, Germany
| | - K Empen
- Division of Internal Medicine, University Medicine, Greifswald, Germany
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23
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Martin Silva N, Audemard A, Costedoat N, Moulis G, Aumaître O, Deroux A, Hummel A, Le Guern V, Papo T, Becquemont L, Verstuyft C, Bienvenu B. Étude de l’impact des polymorphismes des cytochromes P 450 et des glutathion S-transférases dans la réponse au cyclophosphamide et la survenue d’effets secondaires au cours des néphrites lupiques. Rev Med Interne 2014. [DOI: 10.1016/j.revmed.2014.10.026] [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: 10/24/2022]
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24
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Arnaud L, Mathian A, Adoue D, Bader-Meunier B, Baudouin V, Belizna C, Bonnotte B, Boumedine F, Chaib A, Chauchard M, Chiche L, Daugas E, Ghali A, Gobert P, Gondran G, Guettrot-Imbert G, Hachulla E, Hamidou M, Haroche J, Hervier B, Hummel A, Jourde-Chiche N, Korganow AS, Kwon T, Le Guern V, Le Quellec A, Limal N, Magy-Bertrand N, Marianetti-Guingel P, Martin T, Martin Silva N, Meyer O, Miyara M, Morell-Dubois S, Ninet J, Papo T, Pennaforte JL, Polomat K, Pourrat J, Queyrel V, Raymond I, Remy P, Sacre K, Schmidt J, Sibilia J, Viallard JF, Viau Brabant A, Wahl D, Bruckert E, Amoura Z. [Screening and management of cardiovascular risk factors in systemic lupus erythematosus: Recommendations for clinical practice based on the literature and expert opinion]. Rev Med Interne 2014; 36:372-80. [PMID: 25455954 DOI: 10.1016/j.revmed.2014.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 04/17/2014] [Accepted: 10/13/2014] [Indexed: 11/28/2022]
Abstract
PURPOSE To develop French recommendations about screening and management of cardiovascular risk factors in systemic lupus erythematosus (SLE). METHODS Thirty-nine experts qualified in internal medicine, rheumatology and nephrology have selected recommendations from a list developed based on evidence from the literature. For each recommendation, the level of evidence and the level of agreement among the experts were specified. RESULTS Experts recommended an annual screening of cardiovascular risk factors in SLE. Statins should be prescribed for primary prevention in SLE patients based on the level of LDL-cholesterol and the number of cardiovascular risk factors, considering SLE as an additional risk factor. For secondary prevention, experts have agreed on an LDL-cholesterol target of <0.7 g/L. Hypertension should be managed according to the 2013 European guidelines, using renin-angiotensin system blockers as first line agents in case of renal involvement. Aspirin can be prescribed in patients with high cardiovascular risk or with antiphospholipid antibodies. CONCLUSION These recommendations about the screening and management of cardiovascular risk factors in SLE can be expected to improve clinical practice uniformity and, in the longer term, to optimize the management of SLE patients.
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Affiliation(s)
- L Arnaud
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France; Sorbonne universités, UPMC université Paris 06, 75013 Paris, France.
| | - A Mathian
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France; Sorbonne universités, UPMC université Paris 06, 75013 Paris, France
| | - D Adoue
- Service de médecine interne et immunopathologie clinique, hôpital Purpan, Toulouse, France
| | - B Bader-Meunier
- Service d'immunologie et rhumatologie pédiatrique, centre de référence des maladies rares rhumatologiques et inflammatoires pédiatriques (CERHUMIP), hôpital Necker, Paris, France
| | - V Baudouin
- Service de néphrologie pédiatrique, hôpital Robert-Debré, Paris, France
| | - C Belizna
- Service de médecine interne, CHU d'Angers, Angers, France
| | - B Bonnotte
- Service de médecine interne et immunologie clinique, CHU Bocage, Dijon, France
| | - F Boumedine
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France
| | - A Chaib
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France
| | - M Chauchard
- Service de médecine interne, hôpital Bichat, Claude-Bernard, Paris, France
| | - L Chiche
- Service de médecine interne, hôpital de la Conception, Marseille, France
| | - E Daugas
- Service de néphrologie, hôpital Bichat, Paris, France
| | - A Ghali
- Service de médecine interne, CHU d'Angers, Angers, France
| | - P Gobert
- Service de médecine interne et néphrologie, centre hospitalier d'Avignon, Avignon, France
| | - G Gondran
- Service de médecine interne A, hôpital Dupuytren, CHU de Limoges, Limoges, France
| | - G Guettrot-Imbert
- Service de médecine interne, hôpital Gabriel-Montpied, CHU, Clermont-Ferrand, France
| | - E Hachulla
- Service de médecine interne, hôpital Claude-Huriez, CHRU de Lille, Lille, France
| | - M Hamidou
- Service de médecine interne, Nantes, France
| | - J Haroche
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France; Sorbonne universités, UPMC université Paris 06, 75013 Paris, France
| | - B Hervier
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France
| | - A Hummel
- Service de néphrologie adulte, hôpital Necker, Paris, France
| | - N Jourde-Chiche
- Service de néphrologie, hôpital de la Conception, Marseille, France
| | - A-S Korganow
- Service d'immunologie clinique, hôpital civil, CHU de Strasbourg, Strasbourg, France
| | - T Kwon
- Service de néphrologie pédiatrique, hôpital Robert-Debré, Paris, France
| | - V Le Guern
- Service de médecine interne, centre de référence maladies systémiques et auto-immunes rares, sclérodermies, vascularites, groupe hospitalier Cochin, Paris, France
| | - A Le Quellec
- Service de médecine interne A, hôpital Saint-Éloi, Montpellier, France
| | - N Limal
- Service de médecine interne, CHU Henri-Mondor, Créteil, France
| | - N Magy-Bertrand
- Service de médecine interne, CHU Jean-Minjoz, Besançon, France
| | | | - T Martin
- Service d'immunologie clinique, hôpital civil, CHU de Strasbourg, Strasbourg, France
| | | | - O Meyer
- Service de rhumatologie, hôpital Bichat-Claude-Bernard, Paris, France
| | - M Miyara
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France
| | - S Morell-Dubois
- Service de médecine interne, hôpital Claude-Huriez, CHRU de Lille, Lille, France
| | - J Ninet
- Service de médecine interne, hôpital Édouard-Herriot, CHRU de Lyon, Lyon, France
| | - T Papo
- Service de médecine interne, hôpital Bichat, Claude-Bernard, Paris, France
| | - J-L Pennaforte
- Service de médecine interne, CHU de Reims, Reims, France
| | - K Polomat
- Service de médecine interne 5D, CHU de Martinique, Fort-de-France, Martinique
| | - J Pourrat
- Service de néphrologie, hôpital Rangueil, CHU, Toulouse, France
| | - V Queyrel
- Service de médecine interne, hôpital de l'Archet, Nice, France
| | - I Raymond
- Service de médecine interne et maladies infectieuses, hôpital Haut-Lévêque, centre François-Magendie, Pessac, France
| | - P Remy
- Service de néphrologie, groupe hospitalier Henri-Mondor, Créteil, France
| | - K Sacre
- Service de médecine interne, hôpital Bichat, Claude-Bernard, Paris, France
| | - J Schmidt
- Service de médecine interne, CHU Nord, Amiens, France
| | - J Sibilia
- Service de rhumatologie, CHU Hautepierre, Strasbourg, France
| | - J-F Viallard
- Service de médecine interne et maladies infectieuses, hôpital Haut-Lévêque, centre François-Magendie, Pessac, France
| | - A Viau Brabant
- Service de médecine interne, CHU de Reims, Reims, France
| | - D Wahl
- Inserm U 1116, service de médecine vasculaire, département de médecine interne, institut lorrain du cœur et des vaisseaux Louis-Mathieu, centre de compétence régional des maladies systémiques et auto-immunes rares, CHU de Nancy, université de Lorraine, Vandœuvre-lès-Nancy, France
| | - E Bruckert
- Service d'endocrinologie, métabolisme et prévention cardiovasculaire, hôpital Pitié-Salpêtrière, AP-HP, 75013 Paris, France
| | - Z Amoura
- Service de médecine interne 2, Centre national de référence du lupus systémique, groupe hospitalier Pitié-Salpêtrière, AP-HP, 47-83, boulevard de l'Hôpital, 75013 Paris, France; Sorbonne universités, UPMC université Paris 06, 75013 Paris, France
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Kuon E, Felix SB, Weitmann K, Büchner I, Hummel A, Dörr M, Reffelmann T, Riad A, Busch MC, Empen K. ECG-gated coronary angiography enables submillisievert imaging in invasive cardiology. Herz 2014; 40 Suppl 3:247-53. [PMID: 25277222 DOI: 10.1007/s00059-014-4153-7] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 09/02/2014] [Accepted: 09/03/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND The median dose area products (DAP) and effective doses (ED) of patients arising from coronary angiography (CA) are considerable: According the 2013 National German Registry, they amount to 19.8 Gy × cm(2) and 4.0 mSv, respectively. METHODS We investigated the feasibility of prospective electrocardiogram (ECG)-gated coronary angiography (CA)-a novel technique in invasive cardiology-with respect to possible reduction in irradiation effects. Instead of universally fix-rated radiographic acquisition within 7.5-15 frames/s, one single frame/heartbeat was triggered toward the diastolic moment immediately before atrial contraction (77 % of ECG-RR interval) most likely to provide motion-free and hence optimized resolution of the coronary tree. For 200 patients (body mass index 27.8 kg/m(2), age 67.5 years, male 55 %, 68 bpm) undergoing ECG-gated CA, we measured various median (interquartile range) parameters for radiation exposure. RESULTS The total DAP was 0.64 (0.46-1.00), radiographic fraction was 0.30 (0.19-0.43), and fluoroscopic fraction was 0.35 (0.21-0.57) Gy × cm(2). Radiographic imaging occurred within 21.7 s (17.1-26.3), with 25 frames (20-30) over the course of 7 runs (6-8). Fluoroscopy time was 119 s (94-141). Radiographic DAP was 12.6 mGy × cm(2)/frame and 13.8 mGy × cm(2)/s. Fluoroscopic DAP was 0.8 mGy × cm(2)/pulse and 3.1 mGy × cm(2)/s. Patient reference point air kerma was 17.0 mGy (11.1-28.1) and contrast volume was 70 ml (60-85). CONCLUSION In conclusion, invasive ECG-gated coronary imaging is feasible in clinical routine and enables patient EDs of approx. 3 % of typical values in invasive cardiology: 0.13 mSv (0.09-0.20).
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Affiliation(s)
- E Kuon
- Department of Cardiology, Klinik Fraenkische Schweiz, Feuersteinstr. 2, 91320, Ebermannstadt, Germany,
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Servais A, Arnoux JB, Lamy C, Hummel A, Vittoz N, Katerinis I, Bazzaoui V, Dubois S, Broissand C, Husson MC, Berleur MP, Rabier D, Ottolenghi C, Valayannopoulos V, de Lonlay P. Treatment of acute decompensation of maple syrup urine disease in adult patients with a new parenteral amino-acid mixture. J Inherit Metab Dis 2013; 36:939-44. [PMID: 23250513 DOI: 10.1007/s10545-012-9570-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [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] [Received: 09/17/2012] [Revised: 11/21/2012] [Accepted: 11/26/2012] [Indexed: 12/01/2022]
Abstract
BACKGROUND Acute decompensation of maple syrup urine disease (MSUD) is usually treated by enteral feeding with an amino-acid mixture without leucine (Leu), valine or isoleucine. However, its administration is ineffective in cases of gastric intolerance and some adult patients refuse enteral feeding via a nasogastric tube. We developed a new parenteral amino-acid mixture for patients with MSUD. METHODS Seventeen decompensation episodes in four adult patients with MSUD treated with a parenteral amino-acid mixture (group P) were compared to 18 previous episodes in the same patients treated by enteral feeding (group E). RESULTS The mean Leu concentration at presentation was similar in the groups P and E (1196.9 μmol/L and 1212.2 μmol/L, respectively). The mean decrease in the Leu concentration during the first 3 days of hospitalisation was significantly higher in group P than group E (p = 0.0026); there were no side effects. The mean duration of hospitalisation was similar (4 vs. 4.5 days, p = NS). No patient in group P deteriorated whereas one patient in group E required dialysis. CONCLUSION This new parenteral amino-acid mixture is safe and allows efficient Leu concentration decrease during acute MSUD decompensation episodes in adults. Its use avoids the need for nasogastric tube insertion.
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Affiliation(s)
- A Servais
- Department of Nephrology, Hôpital Necker-Enfants Malades AP-HP, Paris, France,
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Kuon E, Empen K, Weitmann K, Staudt A, Hummel A, Dörr M, Reffelmann T, Hoffmann W, Felix S. Long-Term Efficacy of a Mini-Course in Radiation-Reducing Techniques in Invasive Cardiology. ROFO-FORTSCHR RONTG 2013; 185:720-5. [DOI: 10.1055/s-0033-1335323] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- E. Kuon
- Abteilung für Kardiologie, Klinik Fränkische Schweiz, Ebermannstadt
| | - K. Empen
- Abteilung für Innere Medizin B, Ernst-Moritz-Arndt Universität, Greifswald
| | - K. Weitmann
- Institut für Versorgungsmedizin, Ernst-Moritz-Arndt Universität, Greifswald
| | - A. Staudt
- Abteilung für Kardiologie und Angiologie, Helios Kliniken, Schwerin
| | - A. Hummel
- Abteilung für Innere Medizin B, Ernst-Moritz-Arndt Universität, Greifswald
| | - M. Dörr
- Abteilung für Innere Medizin B, Ernst-Moritz-Arndt Universität, Greifswald
| | - T. Reffelmann
- Abteilung für Innere Medizin B, Ernst-Moritz-Arndt Universität, Greifswald
| | - W. Hoffmann
- Institut für Versorgungsmedizin, Ernst-Moritz-Arndt Universität, Greifswald
| | - S. Felix
- Abteilung für Innere Medizin B, Ernst-Moritz-Arndt Universität, Greifswald
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Bourgault M, Grimbert P, Pourrat J, Herody M, Halimi JM, Karras A, Izzedine H, François H, Boffa JJ, Hummel A, Daugas E, Audard V. Infarctus rénaux : corrélations clinicobiologiques en fonction du mécanisme causal. Étude rétrospective réalisée à partir de 94 patients. Nephrol Ther 2012. [DOI: 10.1016/j.nephro.2012.07.298] [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: 10/27/2022]
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Plaisier E, Terrier B, Lacraz A, Bridoux F, Huart A, Marie I, Launay D, Hummel A, Rivalan J, Kahn JE, Cacoub P. Caractéristiques des vascularités cryoglobulinémiques mixtes d’origine non-infectieuse : données de l’enquête nationale CryoVas. Nephrol Ther 2011. [DOI: 10.1016/j.nephro.2011.07.017] [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: 10/17/2022]
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Tchebotareva N, Bobkova I, Kozlovskaya L, Li O, Plaisier E, Terrier B, Lacraz A, Bridoux F, Huart A, Marie I, Launay D, Hummel A, Saint-Martin L, Bonnet F, Belenotti P, Kahn JE, Hinschberger O, Rullier P, Cacoub P, Casian A, Szpirt W, Jayne D, Walsh M, Haris A, Polner K, Aranyi J, Braunitzer H, Meran Z, Kaszas I, Mazanowska O, Koscielska-Kasprzak K, Kaminska D, Penar J, Zabinska M, Dziemianko I, Krajewska M, Klinger M, Marco H, Corica M, Picazo M, Arce Y, Llobet JM, Diaz M, Ballarin J, Kuroki A, Akizawa T, Papasotiriou M, Kalliakmani P, Huang L, Gerolymos M, Goumenos DS, Johnson TS, Ogahara S, Abe Y, Ito K, Watanabe M, Saito T, Saito T, Watanabe M, Ito K, Abe Y, Ogahara S, Nesen A, Topchii I, Semenovylh P, Galchinskaya V, Bantis C, Heering P, Kouri NM, Schwandt C, Rump LC, Ivens K, Nagasawa Y, Iio K, Fukuda S, Date Y, Iwatani H, Yamamoto R, Horii A, Inohara H, Imai E, Ohno H, Rakugi H, Rakugi Y, Sahin OZ, Gibyeli Genek D, Alkan Tasli F, Yavas H, Gurses S, Yeniay P, Uzum A, Ersoy R, Cirit M, Christou D, Molyneux K, Peracha J, Feehally J, Smith AC, Barratt J, Yamamoto R, Nagasawa Y, Shoji T, Katakami N, Ohtoshi K, Hayaishi-Okano R, Yamasaki Y, Yamauchi A, Tsubakihara Y, Imai E, Rakugi H, Isaka Y, Faria B, Vidinha J, Pego C, Garrido J, Lemos S, Lima C, Sorbo G, Lorga E, Sousa T, Yavas HH, Sahin OZ, Ozen KP, Gibyeli Genek D, Ersoy R, Alkan Tasli F, Yucel O, Cirit M, Wada Y, Ogata H, Yamamoto M, Ito H, Kinugasa E, Lundberg S, Lundahl J, Gunnarsson I, Jacobson S, Camilla R, Loiacono E, Dapra V, Morando L, Conrieri M, Bianciotto M, Bosetti FM, Gallo R, Peruzzi L, Amore A, Coppo R, Jeong K, Kim Y, Lee TW, Lee SH, Moon JY, Lee S, Ihm C, Komatsu H, Fujimoto S, Kikuchi M, Sato Y, Kitamura K, Sulikowska B, Johnson R, Grajewska M, Donderski R, Odrowaz-Sypniewska G, Manitius J, Amore A, Camilla R, Morando L, Peruzzi L, Rollino C, Quarello F, Colla L, Segoloni G, Caramello E, Cravero R, Quaglia M, Stratta P, Mazzucco G, Coppo R, Coppo R, Grcevska L, Petrusevska G, Nikolov V, Polenakovic M, Lee KW, Ham YR, Jang WI, Jung JY, Jang DS, Chung S, Choi DE, Na KR, Shin YT, Sulikowska B, Johnson R, Grajewska M, Donderski R, Odrowaz-Sypniewska G, Manitius J, Pasquariello A, Innocenti M, Pasquariello G, Mattei P, Colombini E, Ricchiuti G, Sami N, Cupisti A, Rocchetti MT, Di Paolo S, Tamma G, Lasorsa D, Suriano IV, D'Apollo A, Papale M, Mastrofrancesco L, Grandaliano G, Svelto M, Valenti G, Gesualdo L, Wang C, Li Y, Jia N, Fan J, Vigotti FN, Daidola G, Colla L, Besso L, Segoloni GP, Rocchetti MT, Papale M, Di Paolo S, Vocino G, Suriano IV, D'Apollo A, Grandaliano G, Gesualdo L, Berthoux F, Mohey H, Laurent B, Mariat C, Afiani A, Thibaudin L, Rivera F, Segarra A, Praga M, Vozmediano C, Rivera F, Lopez JM, Hernandez D, Pesickova S, Rysava R, Lenicek M, Potlukova E, Jancova E, Vitek L, Honsova E, Zavada J, Svarcova J, Kalousova M, Trendelenburg M, Tesar V, Li X, Ren H, Zhang W, Pan X, Zhang Q, Chen X, Xu Y, Shen P, Chen N, Hruskova Z, Mareckova H, Svobodova B, Jancova E, Bednarova V, Rysava R, Tesar V, Bobrova L, Kozlovskaya N, Khafizova E, Meteleva N, Shakhnova E, Alsuwaida A, Hussain S, Alghonaim M, AlOudah N, Ullah A, Kfoury H, Lorusso P, Bottai A, Cipollini I, Giorgetti M, Barsotti G, Goplani K, Kaswan K, Gera D, Patel H, Gumber M, Shah P, Vanikar A, Trivedi H, Gluhovschi C, Gluhovschi G, Potencz E, Lazar E, Trandafirescu V, Petrica L, Velciov S, Bozdog G, Bob F, Gadalean F, Vernic C, Cioca D, Bantis C, Heering P, Stangou M, Kouri NM, Schwandt C, Memmos D, Rump LC, Ivens K, Tofik R, Rippe B, Torffvit O, Bakoush O, Silska M, Lipkowska K, Warzywoda A, Soltysiak J, Blumczynski A, Musielak A, Ostalska-Nowicka D, Zachwieja J, Spartalis M, Stangou M, Pliakos K, Oikonomidou D, Pantzaki A, Rizopoulou E, Efstratiadis G, Memmos D, Okino VT, Moyses Neto M, Silva GEB, Vieira Neto O, Romao EA, Coelho EB, Dantas M, Liakou H, Stangou M, Ekonomidou D, Pantzaki A, Patinakis P, Sigounas V, Efstratiadis G, Memmos D, Shvetsov M, Bobkova I, Zheng A, Li O, Chebotareva N, Kamyshova E, Rudenko T, Gelpi R, Navarro I, Ngango L, Poveda R, Goma M, Torras J, Grinyo JM, Fulladosa X, Wang Y, Ivany J, Jardine M, Zhong F, Wang W, Ren H, Xie Y, Huang Q, Chen N, Chiappini MG, Di Girolamo M, Grosso A, Muzi L, Panetta V, Khafizova E, Kozlovskaya N, Bobrova L, Bobkova I, Avdonin P, Gluhovschi C, Gluhovschi G, Potencz E, Lazar E, Trandafirescu V, Petrica L, Velciov S, Bozdog G, Bob F, Gadalean F, Vernic C, Cioca D, Ito M, Kimachi M, Nishio S, Koike T, Choi H, Cho AJ, Jang HR, Lee JE, Huh W, Kim DJ, Oh HY, Kim YG. Clinical Nephrology: primary and secondary glomerulonephritis. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.35] [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: 11/13/2022] Open
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Hummel A, Arno H. Treatment of pollen allergy with high-potency homeopathy C 50,000 (HP50) and voice frequency analysis (VFA) as controlling method—Controlled trial practice with 15 patients. Eur J Integr Med 2009. [DOI: 10.1016/j.eujim.2009.08.041] [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: 10/20/2022]
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Meyer MJ, Rhoads RP, Capuco AV, Connor EE, Hummel A, Boisclair YR, Van Amburgh ME. Ontogenic and nutritional regulation of steroid receptor and IGF-I transcript abundance in the prepubertal heifer mammary gland. J Endocrinol 2007; 195:59-66. [PMID: 17911397 DOI: 10.1677/joe-07-0225] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [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: 11/27/2022]
Abstract
In prepubertal cattle, mammary development is characterized by the growth of an epithelial-rich parenchyma (PAR) into the mammary fat pad (MFP). This proliferation and accumulation of mammary epithelial cells require estrogen. Paradoxically, both epithelial cell proliferation and PAR accumulation rate decline with rising plasma estrogen as puberty approaches. The possibility that variation in abundance of estrogen receptors (ERs) in PAR or MFP accounts for a portion of these effects has not been examined in cattle. Additionally, we recently demonstrated that MFP is highly responsive to exogenous estrogen, suggesting that this tissue may play a role in coordinating estrogen's effects on PAR; however, the developing bovine MFP has yet to be studied in detail. To address these hypotheses, Holstein heifers were assigned to planes of nutrition supporting body growth rates of 950 (E) or 650 (R) g/day and harvested every 50 kg from 100 to 350 kg body weight (BW). Post-harvest, their mammary glands were dissected into PAR and MFP compartments. Transcript abundance of genes encoding members of the ER family (ERalpha, ERbeta, and estrogen-related receptor alpha-1 (ERRalpha)) and estrogen-responsive genes (IGF-I and progesterone receptor (PR)) were measured in both mammary compartments by quantitative real-time RT-PCR. Significant expression was detected for all genes in both compartments, with the exception of the ERbeta gene. Transcript abundance of both ERalpha and IGF-I decreased linearly with increasing BW within both compartments. ERRalpha and PR expressions decreased with increasing BW in PAR but not in MFP. Nutrition stimulated ERalpha and ERRalpha expression in the PAR but had no effect on IGF-I or PR in either PAR or MFP. Overall, ERalpha and IGF-I transcript abundance are consistent with the drop in mammary epithelial cell proliferation and PAR accretion observed over development, but do not support a negative effect of nutrition on PAR growth.
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Affiliation(s)
- M J Meyer
- Department of Animal Science, Cornell University, 272 Morrison Hall, Ithaca, New York 14850, USA
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Kulp J, Rosen M, Shera D, Hummel A, Barnhart K. The search for a candidate vaginal gel: an imaging trial of the distribution of four topical gel formulations in the human vagina. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.183] [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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Terrier B, Hummel A, Fakhouri F, Jablonski M, Hügle T, Gasnault J, Sanson M, Martinez F. [Progressive multifocal leukoencephalopathy in a non-AIDS patient: high efficiency of combined cytarabine and cidofovir]. Rev Med Interne 2007; 28:488-91. [PMID: 17574710 DOI: 10.1016/j.revmed.2007.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [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: 12/19/2006] [Accepted: 05/21/2007] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Progressive multifocal leukoencephalopathy (PML) is an opportunistic infection of the central nervous system, occurring in immunocompromised patients. Treatment, not codified to date, is more often inefficient with a rapid and fatal deterioration. CASE RECORD A 48-year-old woman, treated with immunosuppressant agents for systemic lupus, presented with PML mimicking neurolupus flare. A complete remission was obtained with cytarabine and cidofovir. CONCLUSION Combined cytarabine and cidofovir appears a promising therapeutic option in PML associated with autoimmune systemic disorders.
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Affiliation(s)
- B Terrier
- Service de Néphrologie Adultes, Hôpital Necker-Enfants-malades, Assistance publique-Hôpitaux de Paris (APHP), Université Paris-Descartes, 75015 Paris, France
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Feuerpfeil I, Hummel A, Renner P. Ausgewählte Aspekte bei der mikrobiologischen Überwachung der Trinkwasserqualität. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2007; 50:284-90. [PMID: 17334893 DOI: 10.1007/s00103-007-0153-6] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The new drinking water ordinance (TrinkwV 2001) entered into force in 2003. In this paper we report about experiences with monitoring microbiological quality of drinking water. Special problems, for instance requirements concerning the quality of raw water, new and "old" microbiological parameters, microbiological methods, assessment of parametric values, especially in the case of values higher than the imperative value, are also described. Possible developments in this field are discussed. The paper should support microbiological laboratories, public health officers and other public authorities in monitoring and assessment of drinking water quality.
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Affiliation(s)
- I Feuerpfeil
- Umweltbundesamt, Dienstgebäude Bad Elster, Bad Elster, BRD.
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Terrier B, Fakhouri F, Sultanik P, Delarue R, Hummel A. La fuite urinaire d'érythropoïétine : une cause méconnue d'anémie au cours des syndromes néphrotiques. Rev Med Interne 2006; 27:643-5. [PMID: 16876918 DOI: 10.1016/j.revmed.2006.04.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 01/05/2006] [Accepted: 04/06/2006] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Nephrotic syndrome (NS) is characterized by an excessive urinary protein excretion. CASE RECORD A woman, followed-up for NS, present progressive anemia, with no simple explanation. Plasma EPO is low with significant urinary EPO excretion. Treatment with EPO corrects hemoglobin level. CONCLUSION EPO deficiency due to excessive urinary excretion is an underestimated cause of anemia during NS.
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Affiliation(s)
- B Terrier
- Service de néphrologie adultes, hôpital Necker-Enfants-Malades, Assistance publique-Hôpitaux de Paris, 149-161, rue de Sèvres, 75015 Paris, France
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Dahm JB, Ruppert J, Hartmann S, Vogelgesang D, Hummel A, Felix SB. Directional atherectomy facilitates the interventional procedure and leads to a low rate of recurrent stenosis in left anterior descending and left circumflex artery ostium stenoses: subgroup analysis of the FLEXI-CUT study. Heart 2006; 92:1285-9. [PMID: 16449510 PMCID: PMC1861141 DOI: 10.1136/hrt.2005.081752] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To examine by retrospective analysis of data from the FLEXI-CUT monocentre registry whether atherectomy can effectively simplify complex stent implantation in ostial bifurcation lesions by reducing the procedure to stenting of the left anterior descending (LAD) or left circumflex (LCX) artery ostium alone. PATIENTS AND METHODS All patients who had been enrolled in the prospective FLEXI-CUT study (directional atherectomy with adjunctive balloon angioplasty) were retrospectively analysed on the basis of significant LAD or LCX ostial stenosis (>or= 70% stenosis) deriving from an undiseased left main stem. The primary combined end point was the rate of target lesion revascularisation (TLR) and binary restenosis; secondary end points were procedural success and major adverse cardiac events (MACE) at the six-month follow up. RESULTS Of 30 patients enrolled with significant LAD or LCX ostium stenosis, 29 were effectively treated with directional atherectomy (96.7% procedural success). All patients underwent single-vessel stenting procedures of solely the LAD or LCX ostium. At follow up, binary stenosis was 25% (6 of 24), TLR (angiographic plus clinical) 10.3% (3 of 29) and total MACE 6.9% (2 of 29). CONCLUSIONS Directional atherectomy with single-vessel stenting procedures facilitates the interventional treatment of LAD and LCX ostium stenosis, and leads to remarkably low TLR and binary stenosis at follow up.
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Affiliation(s)
- J B Dahm
- Department of Cardiology, Ernst Moritz Arndt University Greifswald, Friedrich-Loeffler-Strasse 23b, D-17487 Greifswald, Germany.
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Hummel A, Läubli T, Pozzo M, Schenk P, Spillmann S, Klipstein A. Relationship between perceived exertion and mean power frequency of the EMG signal from the upper trapezius muscle during isometric shoulder elevation. Eur J Appl Physiol 2005; 95:321-6. [PMID: 16096843 DOI: 10.1007/s00421-005-0014-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2005] [Indexed: 10/25/2022]
Abstract
The aim of the study was to investigate the relationship between a fatigue-induced increase of perceived exertion in the neck with a decrease of mean power frequency (MPF) in the surface electromyography (sEMG) signal during repeated shoulder elevation endurance tasks. About Thirty-two healthy women (age range 20-62) performed two maximum 6-min shoulder elevation endurance tasks at 30% of their maximal voluntary contraction (MVC) level, separated by a rest of 6 min. During these exercises, perceived exertion was estimated using the Borg scale (range 0-10), whereas the MPF of the sEMG signal from the upper trapezius was simultaneously detected. Linear regression analysis was applied over time for each trial and subject for both MPF and Borg scale rating values. The MPF was normalized by the intercept of the linear regression analysis. The resulting slopes of normalized mean power frequency (nMPF) and Borg scale rating were correlated with each other by linear regression for both trials. In order to investigate the individual behavior of fatigue effects between trials, Delta (trial 2-trial 1) slopes of nMPF and Borg scale ratings were calculated for each subject. These slopes of nMPF and Borg scale ratings were correlated with each other as well by linear regression. The increase of Borg scale ratings, as well as the decrease of nMPF, were significantly higher in trial 2 than trial 1 (P<0.01). The results show a linear correlation between slopes of nMPF and Borg scale ratings for both trials 1 and 2 (r=0.76, P<0.01). Trial-to-trial slopes (Delta (trial 2-trial 1)) of nMPF and Borg scale rating, were also significantly correlated (r=0.68, P<0.05). Thus, the individually sensed increase of perceived exertion in the neck during trial 2 was accompanied by a simultaneously higher detected decrease of nMPF. These findings indicate a close relationship between subjective perception of exertion in the neck and objectively assessed muscle fatigue of the upper trapezius.
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Affiliation(s)
- A Hummel
- Institute of Hygiene and Applied Physiology, Swiss Federal Institute of Technology Zurich, 8092, Zurich, Switzerland,
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Sammel M, Ratcliffe S, Hummel A, Barnhart K. Missing date of last menstrual period: Impact on assessment of hCG for women at risk for an ectopic pregnancy. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.823] [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: 10/26/2022]
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Seeber B, Barnhart K, Sammel M, Zhou L, Guo W, Hummel A. Application of redefined B-hCG curves for the diagnosis of women at risk for ectopic pregnancy: Time saved versus accuracy. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.053] [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: 11/27/2022]
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Gerton GL, Fan XJ, Chittams J, Sammel M, Hummel A, Strauss JF, Barnhart K. A serum proteomics approach to the diagnosis of ectopic pregnancy. Ann N Y Acad Sci 2004; 1022:306-16. [PMID: 15251976 DOI: 10.1196/annals.1318.046] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [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: 11/12/2022]
Abstract
An ectopic pregnancy (EP) occurs when implantation of the embryo occurs outside of the uterus. If left untreated, the developing fetus will continue to grow, leading to life-threatening consequences for the mother. A major difficulty with the diagnosis of ectopic pregnancy is that methods of detection are limited, and some, such as ultrasound, are not very reliable in the earliest days of gestation. Currently, no effective serum test exists to distinguish an ectopic pregnancy from a normal intrauterine pregnancy. The incidence of ectopic pregnancy is increasing and has doubled in the last 20 years. It is now the second most common cause of maternal death in the first trimester of pregnancy. To address this issue, we initiated a project to identify serum markers of ectopic pregnancy. The subjects for these studies presented at the Hospital of the University of Pennsylvania. We obtained over 140 serum samples from women with suspected ectopic pregnancy: women presenting with pain and/or bleeding in the first trimester of pregnancy. The approximate racial breakdown of the subjects is as follows: African American, 36%; Caucasian, 3%; Asian, 2%; Hispanic, 1%; unknown, 58%. Serum samples from 139 women (62 with ectopic pregnancy and 77 with a normal intrauterine pregnancy) were applied to WCX2 (weak ion exchange) protein chip surfaces and analyzed for serum markers using surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF-MS). Several proteins in the 7500-18,000 Da mass range were identified that may discriminate an ectopic pregnancy from an intrauterine pregnancy. The most promising markers were analyzed using classification and regression tree analysis (CART) with and without clinical variables (serum hCG value, length of amenorrhea). Two different algorithms were developed that classify the patients on the basis of sensitivity (number of EPs who screen positive/# of EPs) or specificity (# of healthy patients who screen negative/# of healthy). Our current approach is to refine these two "rule sets" to segregate patients into three groups: those who need immediate intervention for a probable ectopic pregnancy, those who appear to have a normal pregnancy, and those who need further monitoring for diagnosis.
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Affiliation(s)
- G L Gerton
- Center for Research on Reproduction and Women's Health, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania 19104-6080, USA.
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Feuerpfal I, Szewzyk R, Hummel A. Die mikrobiologischen Nachweisverfahren der neuen Trinkwasserverordnung (TrinkwV 2001). Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2003. [DOI: 10.1007/s00103-003-0579-4] [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: 11/25/2022]
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Dahm JB, Protzel C, Klebingat KJ, Hummel A. High-speed rotational atherectomy of bilateral ureter stenosis. Circulation 2001; 104:2627. [PMID: 11714661 DOI: 10.1161/hc4601.098068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- J B Dahm
- Department of Cardiology, Ernst-Moritz-Arndt-University, Greifswald, Germany.
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Lesavre P, Droz D, Noël LH, Hummel A, Aucouturier P, Chauveau D, Grünfeld JP. [AL amyloidosis and monoclonal immunoglobulin deposit diseases]. Rev Med Interne 2001; 22 Suppl 1:16s-17s. [PMID: 11439440 DOI: 10.1016/s0248-8663(01)83335-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- P Lesavre
- Hôpital Necker, 149, rue de Sèvres, 75015 Paris, France
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Hummel A, Chauveau D. [Hyperkalemia. Etiology, physiopathology, diagnosis, treatment]. Rev Prat 2001; 51:667-73. [PMID: 11345870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- A Hummel
- Service de néphrologie, hôpital Necker, 75015 Paris
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Jehle T, Bauer J, Blauth E, Hummel A, Darstein M, Freiman TM, Feuerstein TJ. Effects of riluzole on electrically evoked neurotransmitter release. Br J Pharmacol 2000; 130:1227-34. [PMID: 10903959 PMCID: PMC1572184 DOI: 10.1038/sj.bjp.0703424] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [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] [Indexed: 11/08/2022] Open
Abstract
1. The main purpose of the present study was to investigate the effects of the neuroprotective agent riluzole on the electrically evoked release of [(3)H]-glutamate ([(3)H]-Glu) in mouse neocortical slices. The reported selectivity of riluzole for excitatory amino acids was tested in release experiments with further neurotransmitters. Also distinct species, mouse, rat and man were compared. 2. [(3)H]-Glu was formed endogenously during incubation of slices with [(3)H]-glutamine ([(3)H]-Gln). Released [(3)H]-Glu and tissue [(3)H]-Glu was separated by anion exchange chromatography. Electrically evoked [(3)H]-Glu release was strongly diminished by tetrodotoxin (TTX) and Ca(2+)-withdrawal. 3. Riluzole (100 microM) depressed the release of [(3)H]-Glu up to 77% (IC(50)=19.5 microM). Riluzole was also able to inhibit strongly the electrically evoked release of [(3)H]-acetylcholine ([(3)H]-ACh) (at 100 microM by 92%, IC(50)=3.3 microM, and [(3)H]-dopamine ([(3)H]-DA) (at 32 microM by 72%, IC(50)=6.8 microM). However, the release of [(3)H]-serotonin ([(3)H]-5-HT) was less diminished (at 100 microM by 53%, IC(50)=39.8 microM). Riluzole up to 100 microM did not affect [(3)H]-noradrenaline ([(3)H]-NA) release. 4. Between species, i.e. in mouse, rat and human neocortex, no significant differences between the effects of riluzole could be observed. 5. The NMDA-receptor blocker MK-801 (1 microM) and the AMPA/Kainate-receptor blocker NBQX (1 microM) did neither affect the electrically evoked [(3)H]-ACh release nor its inhibition by riluzole, indicating that effects of riluzole on transmitter release were neither due to modulation of ionotropic Glu receptors, nor due to indirect inhibition of Glu release through these receptors. 6. Taken together, riluzole inhibits the release of distinct neurotransmitters differently, but is not selective for the excitatory amino acid Glu.
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Affiliation(s)
- T Jehle
- Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik Neurozentrum, Breisacher Str. 64, D-79106 Freiburg, Germany
| | - J Bauer
- Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik Neurozentrum, Breisacher Str. 64, D-79106 Freiburg, Germany
| | - E Blauth
- Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik Neurozentrum, Breisacher Str. 64, D-79106 Freiburg, Germany
| | - A Hummel
- Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik Neurozentrum, Breisacher Str. 64, D-79106 Freiburg, Germany
| | - M Darstein
- Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik Neurozentrum, Breisacher Str. 64, D-79106 Freiburg, Germany
| | - T M Freiman
- Neurochirurgische Universitätsklinik, Neurozentrum, Breisacher Str. 64, D-79106 Freiburg, Germany
| | - T J Feuerstein
- Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik Neurozentrum, Breisacher Str. 64, D-79106 Freiburg, Germany
- Author for correspondence:
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Hummel A, Unger G. Detection of Pseudomonas aeruginosa in bronchial and tracheal aspirates by PCR by amplification of the exotoxin A gene. Zentralbl Hyg Umweltmed 1998; 201:349-55. [PMID: 9916289] [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] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
For the first time, a PCR test based on the amplification of the Exotoxin A was evaluated for its ability to rapidly detect Pseudomonas aeruginosa in tracheal and bronchial aspirates from mechanically ventilated patients. The reaction is based on the amplification of a 396 bp region within the Exotoxin A gene. The results show that this PCR-method is suitable for the detection of Pseudomonas aeruginosa even in clinical samples such as aspirates. Among the 380 clinical samples tested in this way, 57 were found to be positive while only 36 were positive using routine culture. In conclusion, these results suggest that the PCR-method mentioned above can be used to provide a specific, rapid, simple, and highly sensitive detection of Pseudomonas aeruginosa in clinical samples.
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Bartczak WM, Hummel A. Computer simulation studies of recombination of ions in multi-ion-pair ensembles. J Radioanal Nucl Chem 1998. [DOI: 10.1007/bf02383704] [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: 10/24/2022]
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Affiliation(s)
- F Glombitza
- Consulting and Engineering GmbH, Chemnitz, Germany
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Gitter B, Hummel A, Glombitza F. Influence of relA locus on electrophoretic mobility of a stringent/relaxed Escherichia coli K 12 strain pair. Microbiol Res 1996; 151:99-103. [PMID: 8857269 DOI: 10.1016/s0944-5013(96)80063-2] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Stringent (relA+) and relaxed (rel A-) controlled Escherichia coli cells differ in their regulation of many biochemical pathways such as phospholipid and lipopolysaccharide metabolism (LPS) after amino acid limitation. Because such differences could result in various cell envelopes, cells of stringent controlled E. coli strain CP78 (relA+) and relaxed controlled E. coli strain CP79 (relA) were studied regarding their electrophoretic mobility. The graphs of the mobility distributions of both strains were different: cells of strain CP79 caused secondary peaks in addition to the main peaks whereas the mobility distributions of cells of strain CP78 showed only one maximum. In the pH range from 6.0 to 8.0 the location of the main peaks of cells of strain CP79 were changed to less negative values after induction of relaxed response. In contrast to this the stringent response in strain CP78 caused no change of the mobility distributions.
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Affiliation(s)
- B Gitter
- Hans-Knoll-Institut fur Naturstoff-Forschung e. V., Jena, Federal Republic of Germany
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