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Artículo

Heterogeneous Distribution of G Protein Alpha Subunits in the Main Olfactory and Vomeronasal Systems of Rhinella ( Bufo ) arenarum Tadpoles

Jungblut, Lucas DavidIcon ; Paz, Dante AgustinIcon ; López, Juan JoséIcon ; Pozzi, Andrea GabrielaIcon
Fecha de publicación: 10/2009
Editorial: Zoological Society of Japan
Revista: Zoological Science
ISSN: 0289-0003
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioquímica y Biología Molecular

Resumen

We evaluated the presence of G protein subtypes Galpha(o), Galpha(i2), and Galpha(olf) in the main olfactory system (MOS) and accessory or vomeronasal system (VNS) of Rhinella (Bufo) arenarum tadpoles, and here describe the fine structure of the sensory cells in the olfactory epithelium (OE) and vomeronasal organ (VNO). The OE shows olfactory receptor neurons (ORNs) with cilia in the apical surface, and the vomeronasal receptor neurons (VRNs) of the VNO are covered with microvilli. Immunohistochemistry detected the presence of at least two segregated populations of ORNs throughout the OE, coupled to Galpha(olf) and Galpha(o). An antiserum against Galpha(i2) was ineffective in staining the ORNs. In the VNO, Galpha(o) neurons stained strongly but lacked immunoreactivity to any other Galpha subunit in all larval stages analyzed. Western blot analyses and preabsorption experiments confirmed the specificity of the commercial antisera used. The functional significance of the heterogeneous G-protein distribution in R. arenarum tadpoles is not clear, but the study of G- protein distributions in various amphibian species is important, since this vertebrate group played a key role in the evolution of tetrapods. A more complete knowledge of the amphibian MOS and VNS would help to understand the functional organization and evolution of vertebrate chemosensory systems. This work demonstrates, for the first time, the existence of a segregated distribution of G-proteins in the OE of R. arenarum tadpoles.
Palabras clave: BUFO ARENARUM , AMPHIBIAN , OLFACTORY NEURONS , VOMERONASAL ORGAN
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/251290
DOI: http://dx.doi.org/10.2108/zsj.26.722
Colecciones
Articulos(IBCN)
Articulos de INST.DE BIOLO.CEL.Y NEURCS."PROF.E.DE ROBERTIS"
Articulos(IFIBYNE)
Articulos de INST.DE FISIOL., BIOL.MOLECULAR Y NEUROCIENCIAS
Citación
Jungblut, Lucas David; Paz, Dante Agustin; López, Juan José; Pozzi, Andrea Gabriela; Heterogeneous Distribution of G Protein Alpha Subunits in the Main Olfactory and Vomeronasal Systems of Rhinella ( Bufo ) arenarum Tadpoles; Zoological Society of Japan; Zoological Science; 26; 10; 10-2009; 722-728
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