📇 Rhumatologue · LA ROCHELLE CEDEX 1 · (17) · Salarié

MME FANNY GENEAU-BODIS

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Auteur de référence en rhumatologie
29 articles scientifiques publiés — un praticien à la pointe de la recherche
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120.2 rhumatos / 100 000 hab. — département bien doté

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📍 LA ROCHELLE CEDEX 1 (17)SalariéRPPS 10100676997

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HOPITAL SAINT-LOUIS - LA ROCHELLE
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Top publications · les plus citées

The NLRP3 inflammasome is activated by nanoparticles through ATP, ADP and adenosine

Cell death & disease · 2015

📚 177 citations🎯 RCR 6.44Top 5% NIH🔓 Open Access📄 PDF gratuit ↗

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AbstractThe NLR pyrin domain containing 3 (NLRP3) inflammasome is a major component of the innate immune system, but its mechanism of activation by a wide range of molecules remains largely unknown. Widely used nano-sized inorganic metal oxides such as silica dioxide (nano-SiO2) and titanium dioxide (nano-TiO2) activate the NLRP3 inflammasome in macrophages similarly to silica or asbestos micro-sized particles. By investigating towards the molecular mechanisms of inflammasome activation in response to nanoparticles, we show here that active adenosine triphosphate (ATP) release and subsequent ATP, adenosine diphosphate (ADP) and adenosine receptor signalling are required for inflammasome activation. Nano-SiO2 or nano-TiO2 caused a significant increase in P2Y1, P2Y2, A2A and/or A2B receptor expression, whereas the P2X7 receptor was downregulated. Interestingly, IL-1β secretion in response to nanoparticles is increased by enhanced ATP and ADP hydrolysis, whereas it is decreased by adenosine degradation or selective A2A or A2B receptor inhibition. Downstream of these receptors, our results show that nanoparticles activate the NLRP3 inflammasome via activation of PLC-InsP3 and/or inhibition of adenylate cyclase (ADCY)-cAMP pathways. Finally, a high dose of adenosine triggers inflammasome activation and IL-1β secretion through adenosine cellular uptake by nucleotide transporters and by its subsequent transformation in ATP by adenosine kinase. In summary, we show for the first time that extracellular adenosine activates the NLRP3 inflammasome by two ways: by interacting with adenosine receptors at nanomolar/micromolar concentrations and through cellular uptake by equilibrative nucleoside transporters at millimolar concentrations. These findings provide new molecular insights on the mechanisms of NLRP3 inflammasome activation and new therapeutic strategies to control inflammation.

B cell activating factor is central to bleomycin- and IL-17-mediated experimental pulmonary fibrosis

Journal of autoimmunity · 2015

📚 91 citations🎯 RCR 3.17Top 15% NIH🔓 Open Access

A prospective multicentre study of mycophenolate mofetil combined with prednisolone as induction therapy in 213 patients with active lupus nephritis

Lupus · 2008

📚 37 citations🎯 RCR 1.46🩺 Clinique

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Mycophenolate mofetil (MMF) with prednisolone has been associated with high remission rates when used as induction treatment for lupus nephritis. This prospective, multicentre, cohort study investigates the efficacy and safety of this regimen over 24 weeks in 213 Chinese patients with active lupus nephritis (Classes III, IV, V or combination). Baseline activity index (AI) was 6.91 ± 3.33 and chronicity index (CI) was 1.9 ± 1.2. The remission rate was 82.6% at 24 weeks (complete remission, 34.3%; partial remission, 48.4%). There were significant ( P < 0.01) improvements in kidney function shown by reductions in proteinuria, serum albumin, serum creatinine and creatinine clearance, as well as in systemic lupus erythematosus disease activity index (SLEDAI) scores. Independent risk factors influencing remission were pathological classification (including Class V and III or Class V and IV nephritis) and elevated serum creatinine at baseline (OR 2.967, 95% CI: 1.479–6.332, P = 0.001 and OR 1.007, 95% CI: 1.002–1.011, P = 0.001, respectively). Patients with concomitant membranous features on biopsy had a lower remission rate than those with Class III and IV nephritis (66.7% vs 87.3%, P = 0.002). Renal biopsy was repeated in 25 patients following treatment. There was a transition to less severe pathological morphologies in majority of subjects. Infections were monitored throughout treatment: eight patients (3.8%) experienced bacterial infections, whereas herpes zoster occurred in seven patients. Nine patients (4.2%) suffered from gastrointestinal upset, which resolved without discontinuation of MMF. One patient became leucopenic, whereas another died from active disease unrelated to kidney symptoms. MMF combined with prednisolone is an effective and well-tolerated induction treatment for patients with active lupus nephritis and for controlling SLE systemic activity.

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MME FANNY GENEAU-BODIS

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Top publications · les plus citées

Publications scientifiques (29) — classées par pathologie

Transversal15

Pédiatrie5

Activité physique / Rééducation2

Génétique2

Anti-IL-171

Case report / série1

Corticothérapie1

Gériatrie1

Lupus1

Microbiote1

Revue générale1

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