Using genome mining and heterologous expression, we report the discovery and production of a new antimicrobial lasso peptide from species related to the Enterobacter cloacae complex. Using NMR and mass spectrometric analysis, we show that this lasso peptide, named cloacaenodin, employs a threaded lasso fold which imparts proteolytic resistance that its unthreaded counterpart lacks. Cloacaenodin has selective, low micromolar, antimicrobial activity against species related to the E. cloacae complex, including species implicated in nosocomial infections and against clinical isolates of carbapenem-resistant Enterobacterales. We further used site-directed mutagenesis to probe the importance of specific residues to the peptide's biosynthesis, stability, and bioactivity.
Background Cutaneous myiasis in patients with malignant wounds or skin cancer is a rare and undesirable event with limited epidemiological data. A subregister of reports, lack of education in the population, inadequate empirical treatments, and medical underestimation are components of a public health problem that threatens patients' lives. Methods We conducted a systematic review of the literature of cutaneous myiasis associated with malignant wounds and skin cancer, characterizing sociodemographic variables, risk factors, clinical and histological features, and treatment. Additionally, we present a demonstrative case with the adequate taxonomic evaluation. Discussion Cutaneous myiasis is an underestimated and poorly managed infestation, which can generate severe complications in oncological patients. This is the first systematic review in the literature about this clinical scenario, which provides information to the physician and clinical researcher about the epidemiological gaps and what has been published so far. Conclusions Findings from the current review have helped to display the sociodemographic, epidemiological, and clinical behavior of myiasis in skin cancer and malignant wounds. Its contribution to the greater tumor tissue destruction is clear; however, more studies are required. The therapeutic management in these patients is equally clarified.
Las pymes desempeñan un papel protagónico en la economía global, por eso su estudio despierta cada vez más el interés de la comunidad científica y académica. Este artículo explora el desarrollado de la investigación sobre el tema financiero, uno de los aspectos relevantes para el crecimiento y la competitividad de este tipo de organizaciones. Se efectúa un mapeo científico de la investigación acerca del desempeño financiero y pymes, a través de un rastreo de la producción científica registrada en las bases de datos Scopus y WoS. Se determinan las regiones, los autores, las instituciones y revistas más relevantes utilizando herramientas y técnicas bibliométricas; también se identifican los documentos más representativos del área y se clasifican empleando el esquema metafórico del árbol. Los resultados permitieron establecer los trabajos seminales y estructurales, al igual que las subáreas que emergen sobre el tema; estas últimas determinan, a su vez, las subáreas o corrientes en las que se enmarca la investigación. El país más relevante en este tópico es Indonesia, seguido de Australia y Sudáfrica; la publicación de mayor impacto es el Journal of Cleaner Production del Reino Unido, y el autor más relevante es Jain, Priyanka, de Delhi Technological University. Finalmente, se plantea una agenda para futuras investigaciones, entre ellas, los rendimientos financieros relacionados con la responsabilidad social corporativa, la innovación empresarial y el sostenimiento del medio ambiente.
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