Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:2.7.7.48 (transcriptase)
 9,479 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Hand, foot and mouth disease (HFMD), a common contagious disease that usually affects children, is normally mild but can have life-threatening manifestations. It can be caused by enteroviruses, particularly Coxsackieviruses and human enterovirus 71 (HEV71) with highly variable clinical manifestations. In the spring of 2008, a large, unprecedented HFMD outbreak in Fuyang city of Anhui province in the central part of southeastern China resulted in a high aggregation of fatal cases. In this study, epidemiologic and clinical investigations, laboratory testing, and genetic analyses were performed to identify the causal pathogen of the outbreak. Of the 6,049 cases reported between 1 March and 9 May of 2008, 3023 (50%) were hospitalized, 353 (5.8%) were severe and 22 (0.36%) were fatal. HEV71 was confirmed as the etiological pathogen of the outbreak. Phylogenetic analyses of entire VP1 capsid protein sequence of 45 Fuyang HEV71 isolates showed that they belong to C4a cluster of the C4 subgenotype. In addition, genetic recombinations were found in the 3D region (RNA-dependent RNA polymerase, a major component of the viral replication complex of the genome) between the Fuyang HEV71 strain and Coxsackievirus A16 (CV-A16), resulting in a recombination virus. In conclusion, an emerging recombinant HEV71 was responsible for the HFMD outbreak in Fuyang City of China, 2008.
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PMID:An emerging recombinant human enterovirus 71 responsible for the 2008 outbreak of hand foot and mouth disease in Fuyang city of China. 2045 51

Hand-foot-and-mouth disease (HFMD) is caused by a group of enteroviruses, most commonly coxsackievirus A 16 (CA16) and enterovirus 71 (EV71). In general, the disease is mild and self-limited except in the case of EV71 infections, which may incur serious complications. This research focused on virus characterization of HFMD cases in Thailand from 2008-2009, related clinical findings and complications of specific enterovirus subtypes. Specimens (stool, vesicle fluid, throat swab/sputum) from 48 cases were collected during 2008-2009. Reverse transcriptase-polymerase chain reaction (PCR) followed by direct sequencing and phylogenetic analysis served to detect enterovirus and determine subtype. Enterovirus was found in 58.3% (28/48) of cases, specifically EV71 (n=23), CA16 (n=4), and CA10 (n=1). Two patients infected by EV71 had brainstem encephalitis (one death). Eight patients required hospital admission due to dehydration. Of these, 3 were PCR positive for EV71, 1 for CA16, and the reminder negative. This study demonstrated EV71 as the most prevalent present cause of HFMD in Thailand in 2008-2009. Potentially fatal complications of HFMD should be taken into consideration. Surveillance of epidemiology and monitoring of disease severity should be continued, and as a prevention measure, sanitation and hygiene should be improved.
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PMID:Clinical and molecular characterization of hand-foot-and-mouth disease in Thailand, 2008-2009. 2065 60

Over the last decade, frequent epidemic outbreaks of hand, foot and mouth disease have been observed in the Asia-Pacific region. Hand, foot and mouth disease is caused by different viruses from the enterovirus family, mainly coxsackievirus A16 and enterovirus 71 (EV71) from the human enterovirus A family. Severe disease and neurological complications are associated more often with EV71 infection, and can lead occasionally to fatal brain stem encephalitis in young children. The rapid progression and high mortality of severe hand, foot and mouth disease makes the direct detection of antigens early in infection essential. The best method for virus detection is the use of specific monoclonal antibodies. The generation and characterization of a monoclonal antibody specific for the 3D polymerase of human enterovirus A and the development of a virus detection dot blot assay are described. A recombinant 3CD protein from EV71 C4 strain was used as an immunogen to generate monoclonal antibodies (MAbs). Screening of hybridoma cells led to the isolation of monoclonal antibody 4B12 of the immunoglobulin IgG1 isotype. MAb 4B12 recognizes the linear epitope DFEQALFS close to the active site of the 3D polymerase, corresponding to amino acid positions 53-60 of 3D and 1784-1791 of enterovirus 71 polyprotein. The presence of 3D polymerase and its precursor 3CD proteinase in purified virus particles was confirmed. MAb 4B12 was used successfully to detect all enterovirus 71 subgenotypes in a denaturing dot blot assay with a sensitivity of 10 pg of 3D protein and 10(4) tissue culture infective dose of virus particles.
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PMID:Characterization of a monoclonal antibody against the 3D polymerase of enterovirus 71 and its use for the detection of human enterovirus A infection. 2222 93

Hand foot and mouth disease (HFMD) is an acute childhood viral exanthem usually associated with coxsackievirus A16 or enterovirus 71. Atypical HFMD associated with coxsackievirus A6 was reported recently. The aim of the current study was to describe coxsackievirus A6-associated atypical HFMD in a series of 8 toddlers who were referred with idiopathic extensive eruptions. Demographic and clinical characteristics, Reverse transcriptase-real-time PCR (RT-PCR) results for enterovirus and phylogenetic analysis for the coxsackievirus A6 strains were recorded. Morphologically polymorphous (vesicular, erosive, papular, desquamative or purpuric) and extensive eruptions were found. One patient had delayed nail shedding. Enterovirus was positive in all patients. Genotype analysis confirmed coxsackievirus A6 in 6 patients and 5 sequences underwent phylogenetic analysis. This is the first such report in Israeli children. In conclusion, coxsackievirus A6 atypical HFMD should be regarded as a novel childhood viral exanthem. We suggest the term "coxsackievirus A6 polymorphic exanthem" due to the extensive and variable nature of this eruption.
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PMID:Coxsackievirus A6 Polymorphic Exanthem in Israeli Children. 2646 13