INVESTIGADORES
POZZI Andrea Gabriela
artículos
Título:
Distribution Pattern of Neuropeptide Y in the Brain, Pituitary and Olfactory System
Autor/es:
HEER T; POZZI AG; YOVANOVICH CA; PAZ DA
Revista:
ANATOMIA HISTOLOGIA EMBRYOLOGIA-JOURNAL OF VETERINARY MEDICINE SERIES C
Editorial:
Blackwell Publishing
Referencias:
Lugar: Munich; Año: 2009 vol. 38 p. 89 - 95
ISSN:
0340-2096
Resumen:
The first NPY-immunoreactivity (ir) in the central nervous
system of Rhinella arenarum was obtained just after hatching
in the pre-optic area, ventral thalamus and rostral rhombencephalon.
During pre-metamorphosis, new NPY-ir cells
were observed in other brain areas such as pallium, septum
and striatum, infundibulum and pars intermedia of the
pituitary. Further maturation continued through pro-metamorphosis
with the appearance of cell groups in the diagonal
band, amygdala, pre-optic nucleus, dorsal nucleus of the
habenula, anterior ventral and dorsal thalamus, suprachiasmatic
nucleus, tuberculum posterior, tectum, torus semicircularis,
inter-peduncular nucleus and median eminence.
During the metamorphic climax and soon after, the relative
abundance of NPY-ir fibres decreased in all hypothalamic
areas and the staining intensity and number of NPY-ir cells
in the pallium also decreased, whereas no cells were found in
the striatum, dorsal nucleus of the habenula and tectum. In
the olfactory epithelium, nerve or bulb, neither cells nor
NPY-ir fibres were found during the stages of development
analysed. The ontogeny pattern of the NPY-ir neuronal
system in the brain of Rh. arenarum is more similar to the
spatiotemporal appearance reported for Rana esculenta than
to that reported for Xenopus laevis. Many NPY-ir fibres were
found in the median eminence and in the pars intermedia of
the pituitary, supporting the idea that this neuropeptide may
play a role in the modulation of hypophyseal secretion
during development.