Artículo
Integrating morphology and physiology of the key endocrine organ during tadpole development: The interrenal gland
Regueira, Eleonora
; O'donohoe, María Elena Ailin
; Pavón Novarin, Mariela; Michou Etcheverría, Gabriela C.; Tropea, Carolina
; Hermida, Gladys Noemí
Fecha de publicación:
09/2022
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Journal of Anatomy
ISSN:
0021-8782
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Indirect development is widespread in anurans and is considered an ancestral condition. The metamorphosis of larvae into juveniles involves highly coordinated morphological, physiological, biochemical, and behavioral changes, promoted by the thyroid hormone and interrenal corticosteroids. Stress response to environmental changes is also mediated by corticosteroids, affecting the timing and rate of metamorphosis and leading to great developmental plasticity in tadpoles. Given the potential effect of interrenal gland ontogeny alterations on metamorphosis and the lack of studies addressing both the morphology and endocrinology of this gland in tadpoles, we present corticosterone (CORT) production and histological changes through the ontogeny of interrenal gland in the generalized pond-type tadpole of Rhinella arenarum (Anura, Bufonidae). This species shows the highest concentration of whole-body CORT by the early climax when drastic metamorphic changes begin. This is coincident with the morphological differentiation of steroidogenic cells and the formation of interrenal cords. By this stage, steroidogenic cells have a shrunken cytoplasm, with a significantly higher nucleus-to-cell diameter ratio. The lowest CORT concentration during premetamorphosis and late climax is associated with small undifferentiated cells with lipid inclusions surrounding large blood vessels between kidneys, and with cords of differentiated steroidogenic cells with a significantly lower nucleus-to-cell diameter ratio, respectively. Our study characterizes the morphological and physiological pattern of interrenal gland development, showing an association between certain histological and morphometric characteristics and CORT levels. Variations in this morpho-physiological pattern should be considered when studying the phenotypic plasticity or variable growth rates of tadpoles.
Palabras clave:
ANURAN
,
HISTOLOGY
,
HORMONES
,
METAMORPHOSIS
,
ONTOGENY
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Identificadores
Colecciones
Articulos(OCA CIUDAD UNIVERSITARIA)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Citación
Regueira, Eleonora; O'donohoe, María Elena Ailin; Pavón Novarin, Mariela; Michou Etcheverría, Gabriela C.; Tropea, Carolina; et al.; Integrating morphology and physiology of the key endocrine organ during tadpole development: The interrenal gland; Wiley Blackwell Publishing, Inc; Journal of Anatomy; 241; 6; 9-2022; 1357-1370
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