Publication: Embryonic development of the bovine pineal gland (Bos taurus) during prenatal life (30 to 135 days of gestation)
Authors
Regodón, S. ; Roncero, V.
item.page.secondaryauthor
item.page.director
Publisher
Murcia : F. Hernández
publication.page.editor
publication.page.department
DOI
item.page.type
info:eu-repo/semantics/article
Description
Abstract
The ontogenesis of the pineal gland of 30
bovine embryos (Bos taurus) has been analysed from 30
until 135 days of gestation by means of optical
microscopy and immunohistochemical techniques. For
this study, the specimens were grouped into three stages
in accordance with the most relevant histological
characteristics: Stage 1 (30 to 64 days of prenatal
development); Stage 2 (70 to 90 days) and Stage 3 (106
to 135 days). In the cow, it is from 30 days of gestation
that the first glandular outline becomes differentiated
from the diencephalic ependyma of the third ventricle.
This differentiation includes the phenomena of
proliferation and multiplication of the ependymal cells
that form the epithelium of the pineal outline in
development. At 82 days of intrauterine life, in the
interior of the pineal parenchyma, we witnessed some
incipient pseudoglandular structures that at 135 days
were well differentiated. The pineal parenchyma
displays a cytology made up of two cellular types of
structurally distinct characteristics: pinealoblasts and
interstitial cells. Both cellular types begin differentiation
at 70 days of embryonic development, the pinealoblasts
being greater in number than the interstitial cells. The
glandular stroma is formed from the capsular, trabecular and the perivascular connective tissue, filling the
interparenchymal space. A dense network of capillaries,
which drive across the trabecular connective tissue
towards the central glandular zone where their density
increases and their calibre is reduced, complete the
glandular structure. GFAP positive cells were observed
in the embryonic pineal parenchyma in stage 3. At 135
days of gestation, NPY positive fibers entered the pineal
gland through the pineal capsule occupying a
perivascular localization. Morphological studies of this
nature are vital for future use as parameters, indicative of
the functional activity of the bovine pineal gland during
embryonic development.
publication.page.subject
Citation
item.page.embargo
Ir a Estadísticas
Sin licencia Creative Commons.