52 research outputs found
Successful treatment of a recurrent Aspergillus niger otomycosis with local application of voriconazole
Fungal otitis (otomycosis) is a common infection encountered by otolaryngologists. Nevertheless, its management can be challenging because of its high recurrence rate and of the limited therapeutic options. A 45-year-old woman suffered from recurrent otomycosis. The ineffectiveness of successive antibiotic cures and repeated topical treatments with nystatin and then with econazole cream led to perform microbiological analyses. Culture of ear swab grew Aspergillus niger. The use of a 1% voriconazole sterile solution previously validated for treatment of eye infections was considered after ensuring the absence of known ototoxic effects of the antifungal and of the excipients. The patient was advised to apply locally this voriconazole solution daily for 14 days (3 drops, 3-4 times a day). Full recovery was obtained at the end of the treatment, and no relevant side effects were noticed. More than one year after completion of therapy, there was no recurrence. Our observation shows that voriconazole 1% solution is an interesting option for treating otomycosis which failed to respond to usual therapeutic options. Further prospective studies are now warranted to confirm these findings
Traitement des angiofibromes de la sclérose tubéreuse de Bourneville par des préparations topiques à base de sirolimus : état des lieux de la préparation en France et revue de la littérature
Introduction
Parmi les diffĂ©rentes affections dermatologiques associĂ©es Ă la sclĂ©rose tubĂ©reuse de Bourneville (STB), les angiofibromes faciaux sont les plus dĂ©figurants. PrĂ©sents chez 85 % des patients, leurs rĂ©percussions sont autant physiques que psychologiques. Les moyens utilisĂ©s pour les traiter tels la chirurgie, la cryothĂ©rapie, lâĂ©lectrocoagulation, la dermabrasion ou le laser ont montrĂ© leur efficacitĂ© dans certains cas. Mais ils prĂ©sentent des aspects contraignants pour leur mise en Ćuvre, notamment chez les plus jeunes, et peuvent se compliquer ou engendrer des sĂ©quelles permanentes. Depuis la dĂ©monstration de lâefficacitĂ© du sirolimus par voie systĂ©mique sur les angiofibromes, des formes topiques de ce mĂ©dicament ont Ă©tĂ© dĂ©veloppĂ©es. Le but de lâĂ©tude qui a Ă©tĂ© menĂ©e est de faire le point sur lâĂ©tat de la prĂ©paration topique de sirolimus en France et de comparer ces donnĂ©es Ă celles trouvĂ©es dans la littĂ©rature.
Matériel et méthodes
Un questionnaire en ligne a Ă©tĂ© envoyĂ© aux pharmaciens de 31 centres hospitaliers universitaires (CHU) de France et de 40 centres hospitaliers membres de lâAssistance publiqueâHĂŽpitaux de Paris (APâHP), les interrogeant sur la rĂ©alisation de la forme topique, les modalitĂ©s de prĂ©paration, de dĂ©livrance au patient, les Ă©tudes menĂ©es ainsi que celles Ă venir. Une revue de la littĂ©rature scientifique et mĂ©dicale, des essais cliniques ainsi que des brevets dĂ©posĂ©s ont Ă©tĂ© menĂ©s.
RĂ©sultats
Onze CHU rĂ©alisent frĂ©quemment cette prĂ©paration en France (taux de rĂ©ponse de 55 %) ; la majoritĂ© depuis un an en moyenne. Les formes galĂ©niques utilisĂ©es sont des pommades ou des crĂšmes et les dosages varient de 0,1 % Ă 1 %. Elles sont dĂ©livrĂ©es aux patients ambulatoires par le biais de la rĂ©trocession hospitaliĂšre. Selon nos calculs, le coĂ»t dâun pot de 25 g de sirolimus Ă 0,1 % est de 110 âŹ. Les principales causes de non rĂ©alisation sont le coĂ»t Ă©levĂ© de la prĂ©paration, le manque de donnĂ©es de sĂ©curitĂ© et dâefficacitĂ© Ă long terme ou lâabsence de demande de la part des services dermatologiques. Ă ce jour, plus dâune vingtaine dâarticles ont Ă©tĂ© publiĂ©s sur le sujet. Cette forme topique a montrĂ© son efficacitĂ© uniquement dans des petites sĂ©ries de cas oĂč trĂšs peu dâeffets indĂ©sirables ont Ă©tĂ© observĂ©s. Quatre essais cliniques ont Ă©tĂ© menĂ©s ou sont en cours et deux formules de sirolimus en topique ont Ă©tĂ© brevetĂ©es.
Discussion
Les formes galĂ©niques, les dosages et modalitĂ©s de prĂ©paration varient dâun Ă©tablissement Ă lâautre. Cette diversitĂ© est expliquĂ©e par le fait quâĂ ce jour, trĂšs peu de donnĂ©es croisant doses/degrĂ©s dâĂ©tendue des lĂ©sions/formes galĂ©niques utilisĂ©es et efficacitĂ© du traitement sont disponibles.
Conclusion
LâĂ©mergence dâun consensus en ce qui concerne la formulation (crĂšme ou pommade, concentration en sirolimusâŠ) serait une avancĂ©e pour la prise en charge des patients atteints de STB.
Mots clés
Sclérose tubéreuse de Bourneville;
Sirolimus;
Topiqu
Formulation and characterization of a 0.1% rapamycin cream for the treatment of Tuberous Sclerosis Complex-related angiofibromas
Medicines for the treatment of rare diseases frequently do not attract the interest of the pharmaceutical industry, and hospital pharmacists are thus often requested by physicians to prepare personalized medicines. Tuberous Sclerosis Complex (TSC) is a rare disease that causes disfiguring lesions named facial angiofibromas. Various topical formulations of rapamycin (=Â sirolimus) have been proved effective in treating these changes in small case series. The present study provides for the first time characterization of a 0.1% rapamycin cream formulation presenting good rapamycin solubilisation. The first step of the formulation is solubilisation of rapamycin in TranscutolÂź, and the second step is the incorporation of the mixture in an oil-in-water cream.
A HPLC stability-indicating method was developed. Rapamycin concentration in the cream was tested by HPLC and confirmed that it remained above 95% of the initial concentration for at least 85 days, without characteristic degradation peaks. The preparation met European Pharmacopoeia microbial specifications throughout storage in aluminum tubes, including when patient use was simulated. Odour, appearance and colour of the preparation were assessed and no change was evidenced during storage. The rheological properties of the cream also remained stable throughout storage.
To conclude, we report preparation of a novel cream formulation presenting satisfactory rapamycin solubilisation for the treatment of TSC cutaneous manifestations, with stability data. The cream is currently being used by our patients. Efficacy and tolerance will be reported later
Exploration du lac de Guerlédan : présentation des projets étudiants en hydrographie et acoustique sous-marine
National audienceLe projet dâexploration du lac de GuerlĂ©dan est un projet portĂ© par lâĂ©quipe OSM (Ocean Sensing and Mapping) de lâENSTA Bretagne Ă destination de ses Ă©tudiants des filiĂšres Hydrographie/OcĂ©anographie et Robotique. Lâobjectif est dâamener les Ă©tudiants de derniĂšre annĂ©e (Ă©quivalent Master 2) Ă mettre en commun leurs connaissances aussi bien pratiques que thĂ©oriques autour dâune problĂ©matique de recherche. GrĂące Ă de nombreux partenaires institutionnels et industriels, les Ă©tudiants ont accĂšs Ă des moyens dâessais de pointe, et peuvent travailler en collaboration avec des experts des domaines concernĂ©s. Parmi les sujets proposĂ©s aux Ă©tudiants, plusieurs ont une forte composante acoustiquecomme par exemple, lâĂ©tude de la composition de la colonne dâeau Ă lâaide de diffĂ©rents systĂšmes sonars, lâĂ©talonnage de la rĂ©flectivitĂ© dâun sondeur multifaisceaux, ou la reconstitution 3D de structures sous-marines par des mĂ©thodes acoustiques. Dans un premier temps, la mise en place du projet dâenseignement et ses aboutissements seront prĂ©sentĂ©s, puis les rĂ©sultats acoustiques des projets Ă©tudiants citĂ©s prĂ©cĂ©demment seront dĂ©taillĂ©s
The cardiovascular safety of oral alitretinoin. A population-based cohort study involving 19,513 patients exposed to oral alitretinoin
International audienceBACKGROUND: Oral alitretinoin is a retinoid used for severe chronic hand eczema. Although caution is recommended for patients with uncontrolled dyslipidaemia or cardiovascular risk factors, the actual atherothrombotic risk has not been investigated thus far. OBJECTIVES: Our aim was to detect any excess of atherothrombotic events among patients exposed to alitretinoin, during the treatment or in the 2 years following initiation. METHODS: Using the French Health Insurance database, we compared the number of patients having had an atherothrombotic event (coronary artery disease, ischemic stroke or peripheral artery disease requiring revascularisation) in the population exposed to oral alitretinoin versus the general population of the same age, gender and baseline cardiovascular risk, using standardized morbidity ratios (SMRs). RESULTS: Between 2009 and 2017, 19,513 patients were exposed to oral alitretinoin in France. Sixty-four (0.3%) patients had an atherothrombotic event while on alitretinoin. Patients receiving alitretinoin experienced no more atherothrombotic events than the general population: patients without cardiovascular risk factors or previous atherothrombotic events reached a SMR of 0.65, 95%CI [0.26-1.34] during alitretinoin treatment, and 1.21, 95%CI [0.90-1.59] in the 2 years following initiation; patients with cardiovascular risk factors or previous atherothrombotic events reached a SMR of 0.82, 95%CI [0.60-1.08] during alitretinoin treatment, and 0.95, 95%CI [0.82-1.09] in the 2 years following initiation. Taken separately, SMRs for each outcome did not increase either. CONCLUSIONS: These data from an exhaustive nationwide population-based study did not support an increase in the incidence of atherothrombotic events under alitretinoin, regardless of the baseline cardiovascular risk of the patient
A direct-sampling multi-channel receiver for DOCSIS 3.0 in 65nm CMOS
This paper presents a fully integrated direct sampling receiver for DOCSIS 3.0, consisting of a time-interleaved ADC, a digital multi-channel selection filter, and a PLL. The receiver can simultaneously receive 4 streams from arbitrary RF frequencies between 48 and 1002MHz and output these in a 13.5MS/s digital IQ format or at a low-IF through integrated DACs. It consumes 980mW from a split 1.2/1.3/1.6V supply when receiving 4 channels and occupies 16.8mm2 in 65nm CMOS
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