Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 7 de 7
Mais filtros

Base de dados
Tipo de estudo
Intervalo de ano de publicação
Rev Med Interne ; 40(3): 173-177, 2019 Mar.
Artigo em Francês | MEDLINE | ID: mdl-30501929


Since 1893, eosinopenia is a biological test to help a diagnosis of bacterial infection. Several publications have confirmed this hypothesis, particularly in the intensive care, pneumology and pediatric units. The value of this marker has been identified in vascular cerebral diseases and coronary bypass. Its contribution seems as relevant as procalcitonin, without extra cost. The diagnostic performance of this test was reinforced by a composite score (CIBLE score) that may improve its value in daily routine. Finally, monitoring eosinopenia appears to be a reliable mortality marker.

Agranulocitose/diagnóstico , Eosinófilos/patologia , Hematologia/tendências , Agranulocitose/etiologia , Agranulocitose/patologia , Infecções Bacterianas/sangue , Infecções Bacterianas/complicações , Infecções Bacterianas/diagnóstico , Hematologia/métodos , Humanos , Contagem de Leucócitos , Prognóstico
Sci Rep ; 6: 25806, 2016 05 19.
Artigo em Inglês | MEDLINE | ID: mdl-27194388


Human respiratory syncytial virus (hRSV) is a leading cause of acute lower respiratory tract infection in infants, elderly and immunocompromised individuals. To date, no specific antiviral drug is available to treat or prevent this disease. Here, we report that the Smoothened receptor (Smo) antagonist cyclopamine acts as a potent and selective inhibitor of in vitro and in vivo hRSV replication. Cyclopamine inhibits hRSV through a novel, Smo-independent mechanism. It specifically impairs the function of the hRSV RNA-dependent RNA polymerase complex notably by reducing expression levels of the viral anti-termination factor M2-1. The relevance of these findings is corroborated by the demonstration that a single R151K mutation in M2-1 is sufficient to confer virus resistance to cyclopamine in vitro and that cyclopamine is able to reduce virus titers in a mouse model of hRSV infection. The results of our study open a novel avenue for the development of future therapies against hRSV infection.

Vírus Sincicial Respiratório Humano/fisiologia , Transcrição Genética , Proteínas Virais/metabolismo , Replicação Viral/fisiologia , Alcaloides/farmacologia , Animais , Linhagem Celular , RNA Polimerases Dirigidas por DNA/metabolismo , Modelos Animais de Doenças , Farmacorresistência Viral/efeitos dos fármacos , Feminino , Regulação Viral da Expressão Gênica/efeitos dos fármacos , Humanos , Camundongos Endogâmicos BALB C , Modelos Moleculares , Infecções por Vírus Respiratório Sincicial/tratamento farmacológico , Infecções por Vírus Respiratório Sincicial/virologia , Vírus Sincicial Respiratório Humano/efeitos dos fármacos , Receptor Smoothened/metabolismo , Transcrição Genética/efeitos dos fármacos , Veratrum/química , Alcaloides de Veratrum/química , Alcaloides de Veratrum/farmacologia , Alcaloides de Veratrum/uso terapêutico , Replicação Viral/efeitos dos fármacos , Replicação Viral/genética
J Mycol Med ; 25(2): 151-4, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25840851


A patient with refractory diffuse lymphoma treated for pulmonary invasive aspergillosis developed a concomitant primary cutaneous mucormycosis. The mucormycete was identified by sequencing as Mucor circinelloides. This case confirms the importance of a rapid pathogen diagnosis in immunocompromised patients and the usefulness of molecular methods for identification of rare fungal species.

Mucor/isolamento & purificação , Mucormicose/microbiologia , Zigomicose/microbiologia , Aspergilose/complicações , Aspergilose/microbiologia , Coinfecção , Dermatomicoses/microbiologia , Feminino , Humanos , Hospedeiro Imunocomprometido , Linfoma Difuso de Grandes Células B/complicações , Linfoma Difuso de Grandes Células B/imunologia , Linfoma Difuso de Grandes Células B/microbiologia , Pessoa de Meia-Idade , Mucormicose/complicações
Rev Med Brux ; 36(5): 436-8, 2015.
Artigo em Francês | MEDLINE | ID: mdl-26749635


A 53-years-old man has a dysentery since two weeks. The blood test shows Coombs-positive hemolytic anemia and inflammation. Autoimmune hemolytic anemia (AIHA) is treated with corticosteroid. A colonoscopy reveals an ulcerative colitis. The evolution of the patient is complicated by a spontaneous digestive perforation treated by total proctocolectomy. After this intervention, there is a resolution of the AIHA and the patient is gradually weaned from corticosteroids. AIHA is a rare extra-intestinal manifestation of inflammatory bowel disease essentially ulcerative colitis. Identification of this cause of secondary AIHA is important for the therapeutic strategy. However treatment is nonspecific and based on low levels of evidence.

Anemia Hemolítica Autoimune/etiologia , Colite Ulcerativa/complicações , Colite Ulcerativa/diagnóstico , Disenteria/complicações , Humanos , Masculino , Pessoa de Meia-Idade
Ann Cardiol Angeiol (Paris) ; 53(6): 320-4, 2004 Nov.
Artigo em Francês | MEDLINE | ID: mdl-15603174


Syncope or presyncope related to adverse drug reactions are well-known. On the other hand, little is known about the specific role of different drugs. Over one six year period, 1611 patients were referred in our hospital for syncope or presyncope, including 688 in the cardiology department. Among these patients, 420 were 70 years old or more. The search for an adverse drug reaction was systematic, with the help of the French method for causality of adverse drug reaction: knowledge of "extrinsic" criteria (bibliographical data relating to the drug involved); moreover, score on the basis of "intrinsic", chronological and symptomatic criteria. Seventy five patients (11% of the group with syncope leading to admission in cardiology department) were thus retained: score = I2, "possible adverse drug reaction", for 28 patients (37%); score = I3, "probable adverse drug reaction", for 47 patients (63%). Score I4, "definite adverse drug reaction" was not used since it required the readministration of the drug to prove the iatrogenic effect. Average age was 78 years, with a female majority of 69%. Seventy two patients (96%) had previous cardiovascular disease, 37 (50%) previously experienced syncope or presyncope. In addition to the basic assessment, a Holter recording was performed among 56 patients, finding a drug-induced arrhythmia in three cases. In the majority of the patients (59 patients, 79%), the adverse drug reaction consisted of hypotension, clinically obvious in 49 cases. In ten cases, vasovagal syndrome facilitated by the drugs was diagnosed by a tilt-test. The other side effects were eight rhythm disorders and eight severe metabolic disorders. The treatments were always multiple. The involved drug was a cardiovascular therapy in 66% of the cases. The other drug classes were primarily represented by uroselective alpha 1-adrenergic blocking drugs (12%) and psychotropic ones (22%). Among the cardiovascular treatments, ACE inhibitors and diuretics, generally in association, were involved (59%). This study confirms the role for antihypertensive drugs in iatrogenic syncope, its great frequency in elderly patients but also the responsibility of another drug class less often reported, the uroselective alpha 1-adrenergic blocking drugs.

Tontura/induzido quimicamente , Síncope/induzido quimicamente , Idoso , Feminino , Humanos , Doença Iatrogênica , Masculino , Estudos Prospectivos
Aquat Toxicol ; 53(1): 65-76, 2001 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-11254947


Cadmium poses a serious environmental threat in aquatic ecosystems but the mechanisms of its toxicity remain unclear. The purpose of this work was first to determine whether cadmium induced apoptosis in trout hepatocytes, second to determine whether or not reactive oxygen species (ROS) were involved in cadmium-induced apoptosis and genotoxicity. Hepatocytes exposed to increasing cadmium concentrations (in the range of 1-10 microM) showed a molecular hallmark of apoptosis which is the fragmentation of the nuclear DNA into oligonucleosomal-length fragments, resulting from an activation of endogenous endonucleases and recognized as a 'DNA ladder' on conventional agarose gel electrophoresis. Exposure of hepatocytes to cadmium led clearly to the DEVD-dependent protease activation, acting upstream from the endonucleases and considered as central mediators of apoptosis. DNA strand breaks in cadmium-treated trout hepatocytes was assessed using the comet assay, a rapid and sensitive single-cell gel electrophoresis technique used to detect DNA primary damage in individual cells. Simultaneous treatment of trout hepatocytes with cadmium and the nitroxide radical TEMPO used as a ROS scavenger, reduced significantly DNA fragmentation, DEVD-related protease activity and DNA strand breaks formation. These results lead to a working hypothesis that cadmium-induced apoptosis and DNA strand breaks in trout hepatocytes are partially triggered by the generation of ROS. Additional studies are required for proposing a mechanistic model of cadmium-induced apoptosis and genotoxicity in trout liver cells, in underlying the balance between DNA damage and cellular defence systems in fish.

Apoptose/efeitos dos fármacos , Intoxicação por Cádmio/veterinária , Doenças dos Peixes/genética , Fígado/efeitos dos fármacos , Oncorhynchus mykiss/genética , Espécies Reativas de Oxigênio/metabolismo , Animais , Antioxidantes/farmacologia , Intoxicação por Cádmio/genética , Óxidos N-Cíclicos/farmacologia , Eletroforese em Gel de Poliacrilamida/veterinária , Doenças dos Peixes/metabolismo , Oncorhynchus mykiss/metabolismo