Low-pathogenicity Mycoplasma spp. alter human monocyte and macrophage function and are highly prevalent among patients with ventilator-acquired pneumonia
| العنوان: | Low-pathogenicity Mycoplasma spp. alter human monocyte and macrophage function and are highly prevalent among patients with ventilator-acquired pneumonia |
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| المؤلفون: | Nolan, T J, Gadsby, N J, Hellyer, T P, Templeton, K E, McMullan, R, McKenna, J P, Rennie, J, Robb, C T, Walsh, T S, Rossi, A G, Conway Morris, A, Simpson, A J |
| المساهمون: | Hellyer, TP [0000-0001-5346-7411], Apollo - University of Cambridge Repository |
| المصدر: | Thorax Nolan, T J, Gadsby, N J, Hellyer, T P, Templeton, K E, McMullan, R, McKenna, J, Rennie, J, Robb, C T, Walsh, T S, Rossi, A G, Conway Morris, A & Simpson, A J 2016, ' Low-pathogenicity Mycoplasma spp. alter human monocyte and macrophage function and are highly prevalent among patients with ventilator-acquired pneumonia ', Thorax, vol. 71, no. 7, pp. 594-600 . https://doi.org/10.1136/thoraxjnl-2015-208050 Nolan, T J, Gadsby, N J, Hellyer, T P, Templeton, K E, McMullan, R, McKenna, J P, Rennie, J, Robb, C T, Walsh, T S, Rossi, A G, Conway Morris, A & Simpson, A J 2016, ' Low-pathogenicity Mycoplasma spp. alter human monocyte and macrophage function and are highly prevalent among patients with ventilator-acquired pneumonia ', Thorax . https://doi.org/10.1136/thoraxjnl-2015-208050 |
| بيانات النشر: | BMJ Publishing Group, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Lipopolysaccharides, Male, Critical Care, Assisted Ventilation, Cytokine Biology, Bacterial Infection, Polymerase Chain Reaction, Monocytes, Mycoplasma, Phagocytosis, Bronchoscopy, Pneumonia, Bacterial, Prevalence, Humans, Aged, Cross Infection, Macrophages, Pneumonia, Ventilator-Associated, Pneumonia, Middle Aged, bacterial infections and mycoses, Innate Immunity, United Kingdom, respiratory tract diseases, Intensive Care Units, Female, Bronchoalveolar Lavage Fluid |
| الوصف: | Background Ventilator-acquired pneumonia (VAP) remains a significant problem within intensive care units (ICUs). There is a growing recognition of the impact of critical-illness-induced immunoparesis on the pathogenesis of VAP, but the mechanisms remain incompletely understood. We hypothesised that, because of limitations in their routine detection, Mycoplasmataceae are more prevalent among patients with VAP than previously recognised, and that these organisms potentially impair immune cell function. Methods and setting 159 patients were recruited from 12 UK ICUs. All patients had suspected VAP and underwent bronchoscopy and bronchoalveolar lavage (BAL). VAP was defined as growth of organisms at >104 colony forming units per ml of BAL fluid on conventional culture. Samples were tested for Mycoplasmataceae (Mycoplasma and Ureaplasma spp.) by PCR, and positive samples underwent sequencing for speciation. 36 healthy donors underwent BAL for comparison. Additionally, healthy donor monocytes and macrophages were exposed to Mycoplasma salivarium and their ability to respond to lipopolysaccharide and undertake phagocytosis was assessed.Results Mycoplasmataceaewerefoundin49%(95%CI 33% to 65%) of patients with VAP, compared with 14% (95% CI 9% to 25%) of patients without VAP. Patients with sterile BAL fluid had a similar prevalence to healthy donor BAL fluid (10% (95% CI 4% to 20%) vs 8% (95% CI 2% to 22%)). The most common organism identified was M. salivarium. Blood monocytes from healthy volunteers incubated with M. salivarium displayed an impaired TNF-α response to lipopolysaccharide ( p=0.0003), as did monocyte-derived macrophages (MDMs) (p=0.024). MDM exposed to M. salivarium demonstrated impaired phagocytosis ( p=0.005).Discussion and conclusions This study demonstrates a high prevalence of Mycoplasmataceae among patients with VAP, with a markedly lower prevalence among patients with suspected VAP in whom subsequent cultures refuted the diagnosis. The most common organism found, M. salivarium, is able to alter the functions of key immune cells. Mycoplasmataceae may contribute to VAP pathogenesis. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1468-3296 0040-6376 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=pmid_dedup__::b8184cd064f66af2bdd9faf97ba011c6 http://europepmc.org/articles/PMC4941152 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.pmid.dedup....b8184cd064f66af2bdd9faf97ba011c6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14683296 00406376 |
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