Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Mais filtros

Base de dados
Tipo de estudo
Intervalo de ano de publicação
Chin Med J (Engl) ; 2020 Feb 11.
Artigo em Inglês | MEDLINE | ID: mdl-32004165


BACKGROUND: Human infections with zoonotic coronaviruses (CoVs), including severe acute respiratory syndrome (SARS)-CoV and Middle East respiratory syndrome (MERS)-CoV, have raised great public health concern globally. Here, we report a novel bat-origin CoV causing severe and fatal pneumonia in humans. METHODS: We collected clinical data and bronchoalveolar lavage (BAL) specimens from five patients with severe pneumonia from Jin Yin-tan Hospital of Wuhan, Hubei province, China. Nucleic acids of the BAL were extracted and subjected to next-generation sequencing. Virus isolation was carried out, and maximum-likelihood phylogenetic trees were constructed. RESULTS: Five patients hospitalized from December 18 to December 29, 2019 presented with fever, cough, and dyspnea accompanied by complications of acute respiratory distress syndrome. Chest radiography revealed diffuse opacities and consolidation. One of these patients died. Sequence results revealed the presence of a previously unknown ß-CoV strain in all five patients, with 99.8% to 99.9% nucleotide identities among the isolates. These isolates showed 79.0% nucleotide identity with the sequence of SARS-CoV (GenBank NC_004718) and 51.8% identity with the sequence of MERS-CoV (GenBank NC_019843). The virus is phylogenetically closest to a bat SARS-like CoV (SL-ZC45, GenBank MG772933) with 87.6% to 87.7% nucleotide identity, but is in a separate clade. Moreover, these viruses have a single intact open reading frame gene 8, as a further indicator of bat-origin CoVs. However, the amino acid sequence of the tentative receptor-binding domain resembles that of SARS-CoV, indicating that these viruses might use the same receptor. CONCLUSION: A novel bat-borne CoV was identified that is associated with severe and fatal respiratory disease in humans.

Nature ; 579(7798): 270-273, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32015507


Since the outbreak of severe acute respiratory syndrome (SARS) 18 years ago, a large number of SARS-related coronaviruses (SARSr-CoVs) have been discovered in their natural reservoir host, bats1-4. Previous studies have shown that some bat SARSr-CoVs have the potential to infect humans5-7. Here we report the identification and characterization of a new coronavirus (2019-nCoV), which caused an epidemic of acute respiratory syndrome in humans in Wuhan, China. The epidemic, which started on 12 December 2019, had caused 2,794 laboratory-confirmed infections including 80 deaths by 26 January 2020. Full-length genome sequences were obtained from five patients at an early stage of the outbreak. The sequences are almost identical and share 79.6% sequence identity to SARS-CoV. Furthermore, we show that 2019-nCoV is 96% identical at the whole-genome level to a bat coronavirus. Pairwise protein sequence analysis of seven conserved non-structural proteins domains show that this virus belongs to the species of SARSr-CoV. In addition, 2019-nCoV virus isolated from the bronchoalveolar lavage fluid of a critically ill patient could be neutralized by sera from several patients. Notably, we confirmed that 2019-nCoV uses the same cell entry receptor-angiotensin converting enzyme II (ACE2)-as SARS-CoV.

Betacoronavirus/classificação , Betacoronavirus/genética , Quirópteros/virologia , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/virologia , Surtos de Doenças , Pneumonia Viral/epidemiologia , Pneumonia Viral/virologia , Animais , Anticorpos Antivirais/sangue , Betacoronavirus/metabolismo , Betacoronavirus/ultraestrutura , Linhagem Celular , China/epidemiologia , Feminino , Genoma Viral/genética , Humanos , Masculino , Peptidil Dipeptidase A/metabolismo , Filogenia , Vírus da SARS/classificação , Vírus da SARS/genética , Homologia de Sequência do Ácido Nucleico , Síndrome Respiratória Aguda Grave , Células Vero
HLA ; 94(5): 444-445, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31368243


HLA-B*46:01:21 differs from HLA-B*46:01:01 by one nucleotide exchange at position 834(G>A) with no amino exchange.

Curr Pharm Des ; 23(39): 5973-5982, 2018 02 12.
Artigo em Inglês | MEDLINE | ID: mdl-28714412


MicroRNAs are small non-coding RNAs with regulatory biological activity, by modulating target genes on epigenetic, transcriptional, post-transciptional and translational levels. Hundreds of reports indicated that miRNAs play important roles in non-small cell lung cancer (NSCLC). Actually, microRNAs are both regulation targets and regulators targeting effector genes. This article reviewed multifaceted role of microRNAs associated to NSCLC, not only targeting to but also targeted by tumor related genes, to help us understand microRNAs related complex regulation networks. Aberrant expressed micoRNAs and their targets were summarized; the statistical results showed that several microRNAs may play key roles by targeting multiple tumor associated targets. On the other hand, Oncogenes and tumor repressors represented by PTEN were also shown to be the most popular targets of microRNAs. Additionally, ZEB1/2 may be a featured pathway in NSCLC, with significant frequency modulated by microRNAs.

Antineoplásicos/farmacologia , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Neoplasias Pulmonares/tratamento farmacológico , MicroRNAs/metabolismo , Animais , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Regulação Neoplásica da Expressão Gênica/genética , Humanos , Neoplasias Pulmonares/metabolismo , MicroRNAs/genética
BMC Pulm Med ; 17(1): 38, 2017 02 14.
Artigo em Inglês | MEDLINE | ID: mdl-28196469


BACKGROUND: Extracorporeal membrane oxygenation (ECMO) is performed as an acceptable life-saving bridging procedure in patients with severe acute respiratory distress syndrome (ARDS).To patients with avian influenza A (H7N9)-associated ARDS, ECMO could be adopted as a feasible therapeutic solution. We present our successful experience with ECMO utilized in a respiratory failure patient with H7N9 infection. CASE PRESENTATION: A 44 years-old female with H7N9-induced ARDS was admitted to intensive care unit (ICU) and was treated with veno-venous ECMO for six days, antiviral therapy, prolonged corticosteroid infusion and other therapies. She suffered significant hemorrhage requiring transfusion of platelets and multidrug-resistant Acinetobacter Baumannii infection during ECMO support. Bleeding and infection almost killed the patient's life. Fortunately, she was alive at last and completly recovered after 38 days of ICU stay. CONCLUSIONS: ECMO was effective in this H7N9 patient with a fatal respiratory failure. Mechanical circulatory support was the only chance for our patient with H7N9-associated ARDS to survive until respiratory function recovery. Early detection and rapid response are essential to these serious ECMO-associated complications such as hemorrhage, thrombosis and infection.

Influenza Humana/terapia , Síndrome do Desconforto Respiratório do Adulto/terapia , Adulto , Oxigenação por Membrana Extracorpórea , Feminino , Hemorragia/etiologia , Humanos , Subtipo H7N9 do Vírus da Influenza A , Influenza Humana/complicações , Unidades de Terapia Intensiva , Radiografia Torácica , Síndrome do Desconforto Respiratório do Adulto/etiologia , Insuficiência Respiratória/terapia , Trombose/etiologia , Tomografia Computadorizada por Raios X
Int J Clin Exp Med ; 8(10): 18391-8, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26770443


BACKGROUND: Incompleteness of interlobar fissures and pleural adhesions, common in tuberculous destroyed lung (TDL), are among "technical contraindications" for video-assisted thoracoscopic surgery (VATS). The efficacy and safety of VATS in the treatment of TDL, has not yet been detailed in. OBJECTIVE: The objective of the present study is to observe the efficacy and safety of VATS in the management of TDL. METHODS: A retrospective review of anatomic lobectomy by VATS on 29 cases of TDL was performed in the Department of Thoracic Surgery of Wuhan Medical Treatment Center between October 2010 and October 2013. RESULTS: All the 29 surgeries by VATS were successfully completed. No death case was reported. Operative duration of VATS was 75~400 min, with an average of 185.4 min; intraoperative amount of bleeding ranged 50 to 2300 ml, with an average of 575.6 ml; the incidence of postoperative complication was 21.4% (6/28). Postoperative complications occurred in 6 cases, among which there were 2 cases of persistent postoperative pulmonary air leak, 2 cases of pleural effusion, one case of thoracic hemorrhage and one case of arrhythmia complicated with left heart failure. There was one patient who was converted from VATS to open thoracic surgery half-way. CONCLUSION: Our results have shown the efficacy, safety and a breakthrough in the "technical contraindications" of VATS in the management of TDL.