جستجوی مقالات مرتبط با کلیدواژه "uterus" در نشریات گروه "دامپزشکی"

In mammalian females, the uterine tissue is highly responsive to steroid hormones and their antagonists.

In the present study, topographical, histoarchitectural, and gene expression changes in goat endometrium treated with estradiol, progesterone, and mifepristone for 24 h were investigated, in vitro.

Scanning electron microscopy (SEM) was used for surface topographical analysis; WGA and DBA lectins were used for histochemical analysis; and qRT-PCR was done for the quantification of mRNA levels of MKI67 (marker of proliferation Ki67), ESR1 (estrogen receptor), PGR (progesterone receptor), CASP3 (caspase 3), and PDGFR-β (platelet derived growth factor receptor-β).

Few topographical alterations were observed in endometrial glands and the presence of scattered mucoid granules. A significant decline in WGA staining was reported only in the progesterone group. However, DBA binding was highest in the progesterone group and lowest in the mifepristone group. The expression of MKI67 gene declined to 79% in the mifepristone group, while in the estradiol and progesterone groups it elevated to 153% and 41%, respectively, than control; a similar trend was observed for PDGFR-β. The mRNA abundance for ESR1 declined to 59% in the progesterone group and 10% in the mifepristone group. However, a 100% increase occurred in the estradiol group. PGR expression followed the same trend as that of ESR1. CASP3 declined in the estradiol (50%) and progesterone (37%) group, but it showed a 67% increase in the mifepristone group.

We concluded that the caprine uterus undergoes dramatic alteration in structure and functions in response to different kinds of steroidal environments.

The microbial population of the uterus fluctuates during the estrous cycle. Microflora of uterus may affect the establishment and maintenance of pregnancy in bitches. The endoscopic samples obtained from the vagina and uterus of 20 female adult mixed‑breed dogs. The uterine lavage samples were prepared for cytology, bacterial (aerobic and anaerobic) and fungal cultures. Uterine tissue samples were evaluated for the presence of E. coli by the polymerase chain reaction. The pure growth of bacteria was observed in seven plates out of the nineteen cultured samples (36.84%) and five Gram-negative and two Gram-positive bacteria were detected. The highest number of isolated bacteria was related to the samples of the diestrus and anestrus stages of the estrous cycle, while the lowest number of bacteria was observed in the samples of the estrous stage. Moreover, Citrobacter spp. was the most frequent group of isolated bacteria. The neutrophils were detected in the cytology of uterine samples. The fungi growth was observed in three uterine samples. Cladosporium and Penicillium isolated from the samples were related to the estrus stage, and yeast was grown in diestrus samples. 16srRNA gene existed in all of the estrous uterine samples in which the bacterial culture was negative. However, the presence of this gene was proven in two samples (33.30%) of negative bacterial culture samples from the diestrus and anestrus stages. In conclusion, the normal bitches’ uteri were infected with various bacteria in estrus, diestrus and anestrus stages of the estrous cycle, and it could coincide with the fungi infection.

This study explored the effects of GnRH agonist (GnRHa) immunity on expression of FSHR mRNA in pituitary and FSHR protein in uteri, and also confirmed its efficacy on uterine development. 42 prepuberty and non cyclic ewes were assigned to 6 experimental groups (EG) during anestrus season. Animals in EG-I, EG-II and EG-III were subcutaneously injected with 200, 300 and 400 μg alarelin antigens (day 0 and 14). Animals in EG-IV and EG-V were subcutaneously injected with 200 and 300 μg alarelin antigen (day 0, 7, 14 and 21). Uterine FSHR protein expression was detected using Western-blotting. RT-PCR was implemented to measure expression of pituitary FSHR mRNA on day 70 after the immunity. Compared to the CG, pituitary FSHR mRNA levels reduced by 58%, 88% and 91% (P<0.01) in EG-I, EG-II and EG-III. FSHR mRNA in EG-IV and EG-V reduced by 64.29% (P<0.05) and 10.11% compared to EG-I and EG-II. Expression levels of uterine FSHR protein in EG-III and EG-V were higher than that in CG. The uterine glands, mitochondria and mitochondrial crista decreased, and the glandular cavity reduced, also the microvilli shortened. Uterine horn weights in EG-I, EG-II and EG-III reduced by 4.66%, 10.20% and 16.63%, respectively. Uterine wall thickness (UWT) in EG-I, EG-II and EG-III reduced by 1.41%, 5.84% and 8.75% (P 0.05). The endometrial epithelium thickness (EET) in EG-I, EG-II and EG-III decreased 2.70%, 8.87% and 19.15%. The positive correlations between uterine horn weights and UWT, EET and FSHR were calculated.