Ovarian surface epithelium in newborn rats: germ cells warehouse
Аутори
Danilović Luković, JelenaKorać, Aleksandra
Milošević, Ivan
Lužajić, Tijana
Kovačević Filipović, Milica
Radovanovic, Anita
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The ovarian surface epithelium (OSE) is a very dynamic part of the ovary, with an
important role in ovulation during the reproductive period. It represents a source of germ cells in
the fetal period but data regarding the role of the OSE in the postnatal period are contradictory.
Although the OSE has been the subject of research in the past few years, its ultrastructure
in newborn rats has not yet been studied. The aim of this study was to examine rat OSE
ultrastructure features in the first 24h hours after birth.
Six newborn rats were euthanized at 12h±2 hours after birth. Their ovaries were fixed in
4% glutaraldehyde, post-fixed in 1% osmium tetroxide, routinely dehydrated and embedded in
araldite. Semi-thin sections were stained with toluidine blue, and used to select areas of interest.
Ultra-thin sections of selected areas were mounted on copper grids and examined under a
Philips CM12 transmission electron microscope. Ultrastructural analysis revealed the presence
of a t...ypically single-layered OSE with sporadic pseudostratified appearance, both consisting
of cuboidal and/or columnar cells. The OSE cells’ nuclei had irregularly dispersed chromatin,
and a central or apical location. From the surface of the OSE cells numerous microvilli and
cytoplasmic projections extended towards the peritoneal cavity. Continuous tunica albuginea
was not found, but occasionally groups of fibroblast-like cells were present, indicating the onset
of its formation. Numerous oogonia and oocytes were identified between OSE cells or up to
their basal part, suggesting that extrusion (the release of germ cells into the peritoneal cavity)
may be an important mode of germ cell elimination.
In the early postnatal period in rat ovaries massive death takes place of oogonia and
oocytes, mostly via apoptosis and autophagy. Further investigation might reveal the contribution
of extrusion as another form of germ cell elimination for both, maintaining and balancing their
number in the ovary, which is necessary for proper reproductive function.
Кључне речи:
ovarian surface epithelum / newborn / rat / cell death / ovaryИзвор:
7th International Congress Veterinary science and proffesion, October 5th-7th 2017, Zagreb - Book of abstracts, 2017, 153-153Издавач:
- Faculty of Veterinary Medicine, University of Zagreb, Croatia
Финансирање / пројекти:
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Danilović Luković, Jelena AU - Korać, Aleksandra AU - Milošević, Ivan AU - Lužajić, Tijana AU - Kovačević Filipović, Milica AU - Radovanovic, Anita PY - 2017 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2700 AB - The ovarian surface epithelium (OSE) is a very dynamic part of the ovary, with an important role in ovulation during the reproductive period. It represents a source of germ cells in the fetal period but data regarding the role of the OSE in the postnatal period are contradictory. Although the OSE has been the subject of research in the past few years, its ultrastructure in newborn rats has not yet been studied. The aim of this study was to examine rat OSE ultrastructure features in the first 24h hours after birth. Six newborn rats were euthanized at 12h±2 hours after birth. Their ovaries were fixed in 4% glutaraldehyde, post-fixed in 1% osmium tetroxide, routinely dehydrated and embedded in araldite. Semi-thin sections were stained with toluidine blue, and used to select areas of interest. Ultra-thin sections of selected areas were mounted on copper grids and examined under a Philips CM12 transmission electron microscope. Ultrastructural analysis revealed the presence of a typically single-layered OSE with sporadic pseudostratified appearance, both consisting of cuboidal and/or columnar cells. The OSE cells’ nuclei had irregularly dispersed chromatin, and a central or apical location. From the surface of the OSE cells numerous microvilli and cytoplasmic projections extended towards the peritoneal cavity. Continuous tunica albuginea was not found, but occasionally groups of fibroblast-like cells were present, indicating the onset of its formation. Numerous oogonia and oocytes were identified between OSE cells or up to their basal part, suggesting that extrusion (the release of germ cells into the peritoneal cavity) may be an important mode of germ cell elimination. In the early postnatal period in rat ovaries massive death takes place of oogonia and oocytes, mostly via apoptosis and autophagy. Further investigation might reveal the contribution of extrusion as another form of germ cell elimination for both, maintaining and balancing their number in the ovary, which is necessary for proper reproductive function. PB - Faculty of Veterinary Medicine, University of Zagreb, Croatia C3 - 7th International Congress Veterinary science and proffesion, October 5th-7th 2017, Zagreb - Book of abstracts T1 - Ovarian surface epithelium in newborn rats: germ cells warehouse EP - 153 SP - 153 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2700 ER -
@conference{ author = "Danilović Luković, Jelena and Korać, Aleksandra and Milošević, Ivan and Lužajić, Tijana and Kovačević Filipović, Milica and Radovanovic, Anita", year = "2017", abstract = "The ovarian surface epithelium (OSE) is a very dynamic part of the ovary, with an important role in ovulation during the reproductive period. It represents a source of germ cells in the fetal period but data regarding the role of the OSE in the postnatal period are contradictory. Although the OSE has been the subject of research in the past few years, its ultrastructure in newborn rats has not yet been studied. The aim of this study was to examine rat OSE ultrastructure features in the first 24h hours after birth. Six newborn rats were euthanized at 12h±2 hours after birth. Their ovaries were fixed in 4% glutaraldehyde, post-fixed in 1% osmium tetroxide, routinely dehydrated and embedded in araldite. Semi-thin sections were stained with toluidine blue, and used to select areas of interest. Ultra-thin sections of selected areas were mounted on copper grids and examined under a Philips CM12 transmission electron microscope. Ultrastructural analysis revealed the presence of a typically single-layered OSE with sporadic pseudostratified appearance, both consisting of cuboidal and/or columnar cells. The OSE cells’ nuclei had irregularly dispersed chromatin, and a central or apical location. From the surface of the OSE cells numerous microvilli and cytoplasmic projections extended towards the peritoneal cavity. Continuous tunica albuginea was not found, but occasionally groups of fibroblast-like cells were present, indicating the onset of its formation. Numerous oogonia and oocytes were identified between OSE cells or up to their basal part, suggesting that extrusion (the release of germ cells into the peritoneal cavity) may be an important mode of germ cell elimination. In the early postnatal period in rat ovaries massive death takes place of oogonia and oocytes, mostly via apoptosis and autophagy. Further investigation might reveal the contribution of extrusion as another form of germ cell elimination for both, maintaining and balancing their number in the ovary, which is necessary for proper reproductive function.", publisher = "Faculty of Veterinary Medicine, University of Zagreb, Croatia", journal = "7th International Congress Veterinary science and proffesion, October 5th-7th 2017, Zagreb - Book of abstracts", title = "Ovarian surface epithelium in newborn rats: germ cells warehouse", pages = "153-153", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2700" }
Danilović Luković, J., Korać, A., Milošević, I., Lužajić, T., Kovačević Filipović, M.,& Radovanovic, A.. (2017). Ovarian surface epithelium in newborn rats: germ cells warehouse. in 7th International Congress Veterinary science and proffesion, October 5th-7th 2017, Zagreb - Book of abstracts Faculty of Veterinary Medicine, University of Zagreb, Croatia., 153-153. https://hdl.handle.net/21.15107/rcub_rimsi_2700
Danilović Luković J, Korać A, Milošević I, Lužajić T, Kovačević Filipović M, Radovanovic A. Ovarian surface epithelium in newborn rats: germ cells warehouse. in 7th International Congress Veterinary science and proffesion, October 5th-7th 2017, Zagreb - Book of abstracts. 2017;:153-153. https://hdl.handle.net/21.15107/rcub_rimsi_2700 .
Danilović Luković, Jelena, Korać, Aleksandra, Milošević, Ivan, Lužajić, Tijana, Kovačević Filipović, Milica, Radovanovic, Anita, "Ovarian surface epithelium in newborn rats: germ cells warehouse" in 7th International Congress Veterinary science and proffesion, October 5th-7th 2017, Zagreb - Book of abstracts (2017):153-153, https://hdl.handle.net/21.15107/rcub_rimsi_2700 .