INVESTIGADORES
PIGOZZI Maria Ines
artículos
Título:
Chromosomal Axis Formation and Meiotic Progression in Chicken Oocytes: A Quantitative Analysis
Autor/es:
DEL PRIORE LUCIA; PIGOZZI MI
Revista:
CYTOGENETIC AND GENOME RESEARCH
Editorial:
KARGER
Referencias:
Lugar: Basel; Año: 2012 vol. 137 p. 15 - 21
ISSN:
1424-8581
Resumen:
The assembly and disassembly of the synaptonemal complexes
(SCs) correlate with the progression of meiotic prophase
I. Using immunostaining of the cohesin component
SMC3, which is present in the axial elements of the SC, we
characterized the synaptic process in chicken oocytes and
quantified the frequency of the different prophase stages at
hatching and at 3 different ages after hatching. The analysis
provides detailed quantitative data regarding the meiotic
stages in the chicken ovary showing that the maximum
amount of pachytene oocytes is found around hatching and
that oocytes reach the diplotene stage 5 days after entering
into meiosis. We confirmed the asynchrony of the meiotic
development in the female chicken gonad showing that the
ovary has a composite population of cells at different stages
from day 17 before hatching and for several days after hatching.
The significance of these results is discussed in relationship
to functional experimental procedures that involve avian
oocytes.