NEUROBIOLOGY, PHYSIOLOGY, BIOCHEMISTRY Isolation and Partial Characterization of Proteins with Vasodegenerative and Proinflammatory Properties from the Egg-Nests of Hylesia metabus (Lepidoptera: Saturniidae)

نویسندگان

  • ULF LUNDBERG
  • VICTOR SALAZAR
  • MARIA TOVAR
  • JESSICA RODRIGUEZ
چکیده

TheHylesiagenuscomprisesagroupofNeotropicalmothsubiquitous in theAmericas from Arizona toArgentina.One of the species of theHylesia genus inVenezuela, FrenchGuyana, andTrinidad has been identiÞed as Hylesia metabus (Cramer 1775) (Lepidoptera: Saturniidae). In Venezuela, these moths are found in abundance in the mangrove (Avicennia spp.) swamps surrounding the Gulf of Paria and theOrinocoDelta in the easternpart of the country.During themating season, the female adults shed copious amounts of urticating setae in the air, producing a severe papulovesicular dermatitis among the population in the affected areas. The females also use their urticating setae to protect the eggs during the hatching period. In the current study, we have isolated and partially characterized proteins with proinßammatory properties from the urticating setae in the egg-nests by using sodium dodecyl sulfate-polyacrylamide gel electrophoresis and anionic exchange-high-performance liquid chromatography (HPLC). We also have studied the biological response of the egg-nest extract and the HPLC puriÞed fractions by inoculation in guinea pigs; and, analyzing the tissue samples by means of histopathological methods. The results of this study show that the extracted venom and HPLC puriÞed subcomponents give rise to an intense inßammatory reaction characterized bymassive inÞltration of inßammatory cells, echymoses, and vascular degeneration. Chromatographic separation showed that the venom was made up of proteins having selectively vasodegenerative-Þbrinolytic or proinßammatory-quimotactic properties. RESUMEN El género “Hylesia” está conformadopor un grupodepolillas neotropicales que abundan desde el estado de Arizona de los Estados Unidos hasta el extremo sur del subcontinente. Una de las especies de las polillas “Hylesia” encontados en Venezuela, la Guayana Francesa y Trinidad ha sido identiÞcado como Hylesia metabus (Cramer, 1775) (Lepidoptera, Saturniidae). En Venezuela estas polillas se encuentran en gran abundancia dentro de los manglares (Avicennia spp.) del Golfo Triste (Golfo de Paria) y los caños adyacentes delDelta deOrinoco en el oriente del paṍs. Durante las épocas de empareamiento las hembras adultas de este especie libera cantidades enormes de una minúscula pelusa urticante (setas) en el medio ambiente, produciendo una dermatitis papulo-vesicular severo entre los pobladores de las zonas adyacentes a los manglares. En el presente estudio hemos logrado aislar y caracterizar sustancias protéicas con propiedades proinßamatorias de las setas urticantes de las posturas de huevos de este especie usando electroforesis en poliacrilamida y cromatografṍa de intercambio aniónico lṍquida de alta resolución (HPLC). Hemos estudiado la respuesta inßamatoria del extracto de las posturas de huevos y sus componentes aislados en un modelo animal utilizando el pabellón auricular delAcure (Cavia porcellus)mediantemétodos dehistopatologṍa. Los resultados del presente estudio muestran que el veneno extraṍdo, y sus subcomponentes, dan origen a una reacción inßamatoria intensa caracterizado por inÞltración masiva de células inßamatorias, echimosis, y degeneración vascular. La separación cromatográÞca mostró que el veneno contiene proteṍnas con propiedades selectivamente Þbrinolṍtico-vasodegenerativos o quṍmotactico-proinßamatorios.

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تاریخ انتشار 2007