Altered state of primordial follicles in neonatal and early infantile rats due to maternal hypothyroidism: Light and electron microscopy approach
Само за регистроване кориснике
2016
Аутори
Danilović-Luković, JelenaKorac, Aleksandra
Milošević, Ivan
Lužajić, Tijana
Puskas, Nela
Kovačević-Filipović, Milica
Radovanović, Anita
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Thyroid hormones (TH) are one of the key factors for normal prenatal development in mammals. Previously, we showed that subclinical maternal hypothyroidism leads to premature atresia of ovarian follicles in female rat offspring in the pre-pubertal and pubertal periods. The influence of decreased concentration of TH on primordial follicles pool formation during neonatal and early infantile period of rat pups was not investigated previously. Maternal hypothyroidism during pregnancy has irreversible negative influence on primordial follicles pool formation and population of resting oocytes in female rat offspring. The study was done on neonatal and early infantile control (n-10) and hypothyroid (n-10) female rat pups derived from control (n-6) and propylthiouracil (PTU) treated pregnant dams (n-6), respectively. Ovaries of all pups were removed and processed for light and transmission electron microscopy (TEM). Number of nests, oogonia and oocytes per nest, primordial, primary, secondary ...and preantral follicles were determined. Screening for overall calcium presence in ovarian tissue was done using Alizarin red staining. Morphology and volume density of nucleus, mitochondria and smooth endoplasmic reticulum (sER) in the oocytes in primordial follicles was also assessed. Caspase-3 and terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL), both markers for apoptosis, and proliferating cell nuclear antigen (PCNA) for proliferation were determined in oocytes and granulosa cells in different type of follicles. In neonatal period, ovaries of hypothyroid pups had a decreased number of oogonia, oocytes and nests, an increased number of primordial follicles and a decreased number of primary and secondary follicles, while in early infantile period, increased number of primary, secondary and preantral follicles were found. Alizarin red staining was intense in hypothyroid neonatal rats that also had the highest content of dilated sER. Number of mitochondria with altered morphology in both groups of hypothyroid pups was increased. Apoptosis markers have not shown significant difference between groups but PCNA had an increased expression in the oocytes and granulosa cells in primordial follicles of hypothyroid rats. Light and electron microscopy analysis indicate that previously detected premature ovarian follicular atresia in pre-pubertal and pubertal hypothyroid rats is preceded with premature formation of primordial follicles followed by slight changes on sER and mitochondria in examined oocytes, and increased expression of PCNA.
Кључне речи:
Hypothyroidism / Primordial follicle / PCNA / Caspase-3 / TUNEL / Oocyte ultrastructureИзвор:
Micron, 2016, 90, 33-42Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
Финансирање / пројекти:
- Антиоксидативна заштита и потенцијали за диференцијацију и регенерацију мезенхималних матичних ћелија из различитих ткива током процеса старења (RS-MESTD-Basic Research (BR or ON)-175061)
Напомена:
- Peer-reviewed manuscript: https://vet-erinar.vet.bg.ac.rs/handle/123456789/2056
DOI: 10.1016/j.micron.2016.08.007
ISSN: 0968-4328
PubMed: 27569271
WoS: 000386418900006
Scopus: 2-s2.0-84983748482
Колекције
Институција/група
Fakultet veterinarske medicineTY - JOUR AU - Danilović-Luković, Jelena AU - Korac, Aleksandra AU - Milošević, Ivan AU - Lužajić, Tijana AU - Puskas, Nela AU - Kovačević-Filipović, Milica AU - Radovanović, Anita PY - 2016 UR - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1428 AB - Thyroid hormones (TH) are one of the key factors for normal prenatal development in mammals. Previously, we showed that subclinical maternal hypothyroidism leads to premature atresia of ovarian follicles in female rat offspring in the pre-pubertal and pubertal periods. The influence of decreased concentration of TH on primordial follicles pool formation during neonatal and early infantile period of rat pups was not investigated previously. Maternal hypothyroidism during pregnancy has irreversible negative influence on primordial follicles pool formation and population of resting oocytes in female rat offspring. The study was done on neonatal and early infantile control (n-10) and hypothyroid (n-10) female rat pups derived from control (n-6) and propylthiouracil (PTU) treated pregnant dams (n-6), respectively. Ovaries of all pups were removed and processed for light and transmission electron microscopy (TEM). Number of nests, oogonia and oocytes per nest, primordial, primary, secondary and preantral follicles were determined. Screening for overall calcium presence in ovarian tissue was done using Alizarin red staining. Morphology and volume density of nucleus, mitochondria and smooth endoplasmic reticulum (sER) in the oocytes in primordial follicles was also assessed. Caspase-3 and terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL), both markers for apoptosis, and proliferating cell nuclear antigen (PCNA) for proliferation were determined in oocytes and granulosa cells in different type of follicles. In neonatal period, ovaries of hypothyroid pups had a decreased number of oogonia, oocytes and nests, an increased number of primordial follicles and a decreased number of primary and secondary follicles, while in early infantile period, increased number of primary, secondary and preantral follicles were found. Alizarin red staining was intense in hypothyroid neonatal rats that also had the highest content of dilated sER. Number of mitochondria with altered morphology in both groups of hypothyroid pups was increased. Apoptosis markers have not shown significant difference between groups but PCNA had an increased expression in the oocytes and granulosa cells in primordial follicles of hypothyroid rats. Light and electron microscopy analysis indicate that previously detected premature ovarian follicular atresia in pre-pubertal and pubertal hypothyroid rats is preceded with premature formation of primordial follicles followed by slight changes on sER and mitochondria in examined oocytes, and increased expression of PCNA. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Micron T1 - Altered state of primordial follicles in neonatal and early infantile rats due to maternal hypothyroidism: Light and electron microscopy approach VL - 90 SP - 33 EP - 42 DO - 10.1016/j.micron.2016.08.007 ER -
@article{ author = "Danilović-Luković, Jelena and Korac, Aleksandra and Milošević, Ivan and Lužajić, Tijana and Puskas, Nela and Kovačević-Filipović, Milica and Radovanović, Anita", year = "2016", abstract = "Thyroid hormones (TH) are one of the key factors for normal prenatal development in mammals. Previously, we showed that subclinical maternal hypothyroidism leads to premature atresia of ovarian follicles in female rat offspring in the pre-pubertal and pubertal periods. The influence of decreased concentration of TH on primordial follicles pool formation during neonatal and early infantile period of rat pups was not investigated previously. Maternal hypothyroidism during pregnancy has irreversible negative influence on primordial follicles pool formation and population of resting oocytes in female rat offspring. The study was done on neonatal and early infantile control (n-10) and hypothyroid (n-10) female rat pups derived from control (n-6) and propylthiouracil (PTU) treated pregnant dams (n-6), respectively. Ovaries of all pups were removed and processed for light and transmission electron microscopy (TEM). Number of nests, oogonia and oocytes per nest, primordial, primary, secondary and preantral follicles were determined. Screening for overall calcium presence in ovarian tissue was done using Alizarin red staining. Morphology and volume density of nucleus, mitochondria and smooth endoplasmic reticulum (sER) in the oocytes in primordial follicles was also assessed. Caspase-3 and terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL), both markers for apoptosis, and proliferating cell nuclear antigen (PCNA) for proliferation were determined in oocytes and granulosa cells in different type of follicles. In neonatal period, ovaries of hypothyroid pups had a decreased number of oogonia, oocytes and nests, an increased number of primordial follicles and a decreased number of primary and secondary follicles, while in early infantile period, increased number of primary, secondary and preantral follicles were found. Alizarin red staining was intense in hypothyroid neonatal rats that also had the highest content of dilated sER. Number of mitochondria with altered morphology in both groups of hypothyroid pups was increased. Apoptosis markers have not shown significant difference between groups but PCNA had an increased expression in the oocytes and granulosa cells in primordial follicles of hypothyroid rats. Light and electron microscopy analysis indicate that previously detected premature ovarian follicular atresia in pre-pubertal and pubertal hypothyroid rats is preceded with premature formation of primordial follicles followed by slight changes on sER and mitochondria in examined oocytes, and increased expression of PCNA.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Micron", title = "Altered state of primordial follicles in neonatal and early infantile rats due to maternal hypothyroidism: Light and electron microscopy approach", volume = "90", pages = "33-42", doi = "10.1016/j.micron.2016.08.007" }
Danilović-Luković, J., Korac, A., Milošević, I., Lužajić, T., Puskas, N., Kovačević-Filipović, M.,& Radovanović, A.. (2016). Altered state of primordial follicles in neonatal and early infantile rats due to maternal hypothyroidism: Light and electron microscopy approach. in Micron Pergamon-Elsevier Science Ltd, Oxford., 90, 33-42. https://doi.org/10.1016/j.micron.2016.08.007
Danilović-Luković J, Korac A, Milošević I, Lužajić T, Puskas N, Kovačević-Filipović M, Radovanović A. Altered state of primordial follicles in neonatal and early infantile rats due to maternal hypothyroidism: Light and electron microscopy approach. in Micron. 2016;90:33-42. doi:10.1016/j.micron.2016.08.007 .
Danilović-Luković, Jelena, Korac, Aleksandra, Milošević, Ivan, Lužajić, Tijana, Puskas, Nela, Kovačević-Filipović, Milica, Radovanović, Anita, "Altered state of primordial follicles in neonatal and early infantile rats due to maternal hypothyroidism: Light and electron microscopy approach" in Micron, 90 (2016):33-42, https://doi.org/10.1016/j.micron.2016.08.007 . .