Browsing by Author "Ramos, Sergio"
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- ItemDistribution, Invasion History, and Ecology of Non-native Pine Bark Beetles (Coleoptera: Curculionidae: Scolytinae) in Southern South America(2024) Lantschner, Victoria; Gomez, Demian F.; Vilardo, Gimena; Stazione, Leonel; Ramos, Sergio; Eskiviski, Edgar; Fachinetti, Romina; Schiappacassi, Marcela; Vallejos, Natalia; Germano, Monica; Villacide, Jose; Grilli, Mariano P.; Martinez, Gonzalo; Ahumada, Rodrigo; Estay, Sergio A.; Dumois, Ignacio; Corley, JuanThe growth of international trade, coupled with an expansion of large-scale pine plantations in South America during the second half of the twentieth century, has significantly increased the opportunities for the invasion of forest insects. Bark beetles (Coleoptera: Curculionidae, Scolytinae) are a large and diverse group of insects, commonly recognized as one of the most important tree mortality agents in coniferous forests worldwide and an important group among invasive forest species. In this study, we combined data from field sampling with published records of established non-native pine bark beetles, to describe their distribution and invasion history in pine plantations across southern South America, reviewing the available information on their phenology and host range. We obtained records of established populations of six Eurasian species distributed in two major regions: the southwest region comprises plantations in Chile and the Argentine Patagonia, with four bark beetle species: Hylastes ater, Hylastes linearis, Hylurgus ligniperda, and Orthotomicus laricis; the northeastern zone includes northeastern Argentina, Uruguay, and southern Brazil, and includes three bark beetle species: Cyrtogenius luteus, H. ligniperda, and O. erosus. The establishment of non-native populations across the study area began in the 1950s, and from the 1980s onwards, there has been an exponential increase in introductions. We predict that several of these species will continue spreading across South America and that new species will continue arriving. We highlight the importance of international collaboration for early detection and management of non-native pine bark beetles.
- ItemTenorio syndrome: Description of 14 novel cases and review of the clinical and molecular features(2021) Tenorio Castaño, Jair Antonio; Arias, Pedro; Fernández Jaén, Alberto; Lay-Son, Guillermo; Bueno Lozano, Gloria; Bayat, Allan; Faivre, Laurence; Gallego, Natalia; Ramos, Sergio; Butler, Kameryn M.; Morel, Chantal; Hadjiyannakis, Stasia; Lespinasse, James; Tran-Mau-Them, Frederic; Santos Simarro, Fernando; Pinson, Lucile; Martínez Monseny, Antonio Federico; O'Callaghan Cord, María del Mar; Álvarez, Sara; Stolerman, Elliot S.; Washington, Camerun; Ramos, Feliciano J.; The S. O. G. R. I. Consortium; Lapunzina, PabloTenorio syndrome (TNORS) (OMIM #616260) is a relatively recent disorder with very few cases described so far. Clinical features included macrocephaly, intellectual disability, hypotonia, enlarged ventricles and autoimmune diseases. Molecular underlying mechanism demonstrated missense variants and a large deletion encompassing RNF125, a gene that encodes for an U3 ubiquitin ligase protein. Since the initial description of the disorder in six patients from four families, several new patients were diagnosed, adding more evidence to the clinical spectrum. In this article, we described 14 additional cases with deep phenotyping and make an overall review of all the cases with pathogenic variants in RNF125. Not all patients presented with overgrowth, but instead, most patients showed a common pattern of neurodevelopmental disease, macrocephaly and/or large forehead. Segregation analysis showed that, though the variant was inherited in some patients from an apparently asymptomatic parent, deep phenotyping suggested a mild form of the disease in some of them. The mechanism underlying the development of this disease is not well understood yet and the report of further cases will help to a better understanding and clinical characterization of the syndrome.