background: congenital toxoplasmosis is one cause of abortion. infection can disrupt ovarian cycles and because toxoplasmosis is an infectious disease may have a similar effect on the ovaries. the purpose of this study was to investigate the pathological changes in the ovaries due to toxoplasmosis.   methods: tachyzoites of toxoplasma gondii were harvested from peritoneal fluid of mice, experim...

The transcription factors GATA-4 and GATA-6, members of the GATA family, play an important role in ovarian cell proliferation, differentiation and apoptosis. In this study, the full-length coding sequences of goose GATA-4 and GATA-6 were cloned and characterized. GATA-4 and GATA-6 consist of 1236 and 1104 nucleotides encoding proteins with 411 and 367 amino acids, respectively. The deduced amin...

In the middle of the breeding season, 16 pony mares (n = 4 per day) were slaughtered on four different days (days 6, 14, 17 and the preovulatory day) of the oestrous cycle, day 0 being the day of the last ovulation. All the ovaries were examined histologically; the number, size and atresia (defined by granulosa cell pyknosis) of all follicles larger than 1 mm in diameter were studied, using a K...

Objective: To study the feasibility of using combined morphology and terminal deoxynucleotidyl transferase-mediated dUTP-digoxigenin nick-end labeling (TUNEL) for apoptosis detection and the impact of cryopreservation on this process. Materials and methods: We conducted this investigation using a porcine animal model. Bilateral oophorectomy was performed in eight sows. The ovarian tissues were ...

Type 1 angiotensin II (ANG II) receptors play crucial roles in the regulation of blood pressure and fluid osmolarity, whereas the physiological roles of type 2 ANG II receptors (AT2) remain unclear. Because AT2 is expressed in atretic follicles where granulosa cells undergo apoptosis, we examined the space and time relationship between AT2 expression and follicle atresia in vivo and the effect ...

In teleost, follicle atresia is a common degenerative process that can occur at different stages of ovarian development. this study, we depicted the cellular morphology silver pomfret (Pampus argenteus) follicular in detail and divided it into four from A? to A? based on main characteristics. High-throughput RNA sequencing was used profile stages, many stage-specific genes were identified. earl...

BACKGROUND Congenital toxoplasmosis is one cause of abortion. Infection can disrupt ovarian cycles and because toxoplasmosis is an infectious disease may have a similar effect on the ovaries. The purpose of this study was to investigate the pathological changes in the ovaries due to toxoplasmosis. METHODS Tachyzoites of Toxoplasma gondii were harvested from peritoneal fluid of mice, experimen...

Rabbit ovarian microvasculature, with particular regard to developing and atretic follicles, was studied by scanning electron microscopy (SEM) of vascular corrosion casts. The microvascular network of the follicles was arranged in typical round plexuses of varying shape and size. Four different morphological types of vascular plexuses supplied the follicles: Type 1 (100-250 microns in diameter)...

Studies were conducted to characterize the chicken (c) FSH receptor (R) cDNA, and to evaluate expression of cFSH-R mRNA in the hen ovary at known stages during follicle development. A total of 2.5 kb of nucleic acid sequence including the complete cFSH-R coding region was isolated by a combination of the reverse-transcription polymerase chain reaction and 5'- and 3'-rapid amplification of cDNA ...