Reproductive Organs Of Female Rats Research Articles

Investigating the Impact of Launaea angustifolia Extract on the Reproduction Function of Female Rats

Background: The purpose of this study is to investigate the effects of Launaea angustifolia methanol extract on the reproductive organs of female rats through the use of chemical screening. Methods: A total of twenty-five female rats were separated into five distinct groups to be examined. The group that served as the control did not receive any dose, whereas the group that served as the negative control received DEMSO by oral gavage. Group 10 received 10 mg/kg body weight per day, Group 50 received 50 mg/kg body weight per day and Group 100 received 100 mg/kg body weight per day for a period of two weeks. Result: Despite the fact that the body weights of female rats rose during the course of this investigation, there were no significant variations between the groups after 14 days of dosing occurred. In the case of female rats, the body weights of the control group were found to be considerably greater (P less than 0.05) in all experimental days, with the exception of day 1 and day 3, when compared to the groups that received 50 and 100 mg. Although there was a discernible rise in the weight of the ovary in the control group in comparison to the group that was exposed to DMSO.

Rescue role of hesperidin in 4-vinylcyclohexene diepoxide-induced toxicity in the brain, ovary and uterus of wistar rats.

Background The ovotoxicity of 4-vinylcyclohexene diepoxide (VCD) has been established in several experimental models. Hesperidin (HSD) is a bi-flavonoid found in citrus fruits and has been reported to be a potent antioxidant and anti-inflammatory agent. Here, we have evaluated the rescue role of hesperidin on VCD-induced toxicity in the brain, ovary, and uterus of rats. Methods Six groups of rats containing ten rats in each group were orally given corn oil (control), hesperidin (100 mg/kg), hesperidin (200 mg/kg), VCD (250 mg/kg), VCD [(250 mg/kg)+hesperidin (100 mg/kg)] and VCD [(250 mg/kg)+hesperidin (200 mg/kg)] once a day for 30 days, respectively. Thereafter, we determined the selected biomarkers of oxidative damage, inflammation, endocrine balance, and histology of the reproductive organs. Results The data showed that hesperidin rescued VCD-induced increase in oxidative stress (hydrogen peroxide and malondialdehyde) and inflammatory (nitric oxide) biomarkers. In addition, hesperidin restored the reduction in antioxidant enzymes (catalase, glutathione S-transferase, glutathione peroxidase) activities and glutathione level in the brain, ovary, and uterus of rats (p<0.05). Lastly, hesperidin preserved the histological structure of the ovary and uterus of rats exposed to VCD. Conclusions Overall, the rescue role of hesperidin on VCD-induced toxicity in the brain and reproductive organs of female rats may be due to its antioxidative and anti-inflammatory properties.

Subchronic effects of different doses of Zinc oxide nanoparticle on reproductive organs of female rats: An experimental study.

BackgroundZinc performs many biochemical and physiological functions; however, toxicological studies demonstrate that Nano-zinc oxide has harmful effects on human health and environmental species in high concentrations.Objective The aim of this study was to investigate the toxicity of zinc oxide nanoparticles on reproductive tissues of female rat.Materials and MethodsEighty female Wistar adult rats weighing 180–200 gr, divided into eight groups (n= 10 in each group) including control, sham (treated with saline), and six groups injected with different doses of zinc oxide nanoparticle with 10–30 nanometer size (4, 8, 25, 50, 100, and 200 mg/kg) twice a week for four weeks. At the end of the study, the rats were bled and slaughtered; the Ovary and Uterus were taken for histopathology studies and blood samples were transferred to the laboratory for biochemical analysis.ResultsMicroscopic diagnoses in ovary tissue were included; increase in the corpus luteum, follicular cysts, inflammatory cells infiltration and fibrosis. Histopathological changes in ovary in a dose-dependent manner. In uterus tissue the lesions consisted; epithelial destruction, hyperplasia of endometrial glands. The Estrogen and Progesterone level in the serum of rats increased in low doses and reduced in a dose-dependent manner at high doses.ConclusionThe results of the current study proved the toxicity of zinc oxide nanoparticles on the ovary and uterus organs at high concentrations, so further investigation is needed to reduce these effects.

Morphometric and histopathologic evaluation of the effects of cloprostenol and equine chorionic gonadotropin administration on the reproductive organs of female rats

The aim of this study was to determine the short-, mid- and long-term effects of cloprostenol (a synthetic analogue of prostoglandin F2α, PG) and equine chorionic gonadotropin (E) administration on reproductive organs (uterine tissue and ovaries) in female rats. Three different groups, PG, E, and control (C), were created, as well as six subgroups of the PG and E groups. After the treatment procedure, reproductive organs were removed surgically 7, 14, and 21 days after the last injection. Morphometric and histopathological changes in tissues were evaluated. It was shown that PG and E had a moderate proliferative effect on epithelial cells and endometrial glands, especially in the mid-term. It was also observed that, regardless of the time of application, some pathological changes can result from hormone administration.

Effect of Exposure to Mixture of Heavy Metals Arsenic, Cadmium and Lead on Reproductive Function and Oxidative Stress in Female Rats

Background : Toxicological consequences arising from exposure to mixtures of heavy metals especially at low, chronic and environmentally relevant doses are poorly recognised. In the present study, we evaluated effects of chronic exposure to combinations of three metals arsenic (As), cadmium (Cd) and lead (Pb) present frequently in drinking water on reproductive function and oxidative damage caused to reproductive organs of female rats. Method : Female rats were exposed to mixture of metals (As, Cdand Pb) for 90 consecutive days. The gain in body weight and weight of reproductive organs were recorded following autopsy on 91 stday. The oestrus cycle were monitored during entire treatment period. Numbers of corpora lutea, implantation sites, live fetus and survival of the fetus were evaluated in rats mated successfully with untreated male after completion of their respective treatment. Ovarian cholesterol, protein, ascorbic acid and enzyme Δ 5 -3β HSD levels were estimated. Serum levels of steroid hormones oestrogen and progesterone were estimated. Histopathological picture of both ovary and uterus were assessed. Levels of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidise (GPX) activity, amount of reduced glutathione (GSH) and malondyaldehyde (MDA) in blood, ovary and uterus were measured as biomarkers of oxidative stress. Results : The treated rats showed reduced body weight gain and reduction in the weight of ovary and uterus. Oestrus cycle was disrupted with continuous diestrous in treated animals. Number of corpora lutea, implantation sites and live fetus and the survival of fetus evaluate were reduced significantly in treated groups. The levels of ovarian cholesterol and ascorbic acid increased in treated rats with decrease Δ5 -3β HSD level. There was reduction in serum level of both the ovarian steroid hormones oestrogen and progesterone. The protein levels did not differ between the groups. There was a significant increase in levels of MDA and decrease in levels of all the antioxidant enzymes in treated group. Conclusion : The results revealed there was disruption to reproductive functions with decrease in stereoidogenic activity and associated oxidative stress in female rats treated with combination of mixture of metals (Cd, As and Pb) at low dose for 90 consecutive days.

Chlorpyrifos induced toxicity in reproductive organs of female Wistar rats

Chlorpyrifos (CPF) is an organophosphate (OP) insecticide extensively used in agricultural and domestic settings. Healthy adult female albino rats were divided into three groups of six rats in each. Two groups were dosed orally with CPF in vegetable oil (0.1 and 2.5mg/kg/day) and third group was given vegetable oil for 8weeks. Non-significant changes were observed for body weight and feed intake. A disruption in estrous cyclicity was observed with a prolonged metestrous. Erythrocyte osmotic fragility and lipid peroxidation levels increased significantly. Mammary gland whole mounts revealed a significant (P<0.05–0.0001) increase in the ductal thickness, number of branches, alveolar and terminal end bud number and terminal end bud diameter. A significant increase in ovarian surface epithelium height, follicular diameter and follicular atresia was observed in treated rats (P<0.05–0.0001). A similar significant increase in the uterine surface epithelium height, endometrial gland epithelium height and myometrium thickness in higher dose group was recorded (P<0.05–0.0001). Luminal epithelium height and endometrial gland diameter was increased significantly in both the treated groups (P<0.05–0.0001). The results indicate that sub-chronic exposure of CPF causes oxidative stress and negative effects on the reproductive organs of female rats, which may be a pointer towards beginning of cancer incidence.

Amelioration of fluoride toxicity by vitamins and calcium on reproductive organs of female rat

Normal female rats of Wistar strain (Rattus norvegicus) weighing between 150–200 g were treated with fluoride (Fl) contaminated drinking water (FW, 5.8 ppm), vitamin C (6 mg) and vitamin C (6 mg) + D (6 mg once a week) + calcium (6 mg) for 30 days. Fl water treatment to rats produced reduction in weights of ovaries, uterus, vagina, kidneys, and adrenal glands, circulating levels of estrogen, number of litters, fertility rate, and altered tissue and serum biochemistry compared to control rats. However, cholesterol concentrations of ovaries and adrenals increased significantly. The above altered parameters were restored partially/completely after exogenous feeding with vitamin C and vitamins (C + D) and calcium. The data suggest that Fl-induced adverse effects on reproductive and other organs in female rats, whereas vitamin C, vitamin D and calcium treatment ameliorated Fl toxicity. Therefore, vitamins (C and D) and calcium play an important role in prophylactic treatment of fluorosis.

Changes in reproductive organs of female rats treated with bisphenol A during the neonatal period

The effects of neonatal administration of estrogenic agents on rat reproductive organs were examined. Either bisphenol A (BPA; 0.25, 1, or 4 mg/pup) or 10 μg 17β-estradiol (E 2) was given subcutaneously to Sprague–Dawley female rats during the neonatal period from post-natal day (PND) 0 to 9. Animals ovariectomized at 80 days were given subcutaneous injections of 1 μg/kg E 2 for 3 days from PND 94 to 96. Clefts in the clitoris, early vaginal opening, irregular estrous cycles, a decrease in the area occupied by the corpora lutea (CL) in the ovary, and multiple cystic follicles in the ovary were found in the animals treated neonatally with 1 mg BPA. Uterine fluid weight measured after E 2 treatment on PND 94–96 was less than controls. In addition to these abnormalities, unusual body weight gains, persistent vaginal cornification, and lack of CL were observed in females treated neonatally with 4 mg BPA. The ovary weight on PND 80 and uterine fluid weight measured after E 2 treatment on PND 94–96 were less than controls for the 4 mg BPA group. Neonatal treatment with 10 μg E 2 induced similar abnormalities as found in the 4 mg BPA group. These results show that BPA when given during the neonatal period caused changes in female reproductive organs.

Immunocytochemical localization of nitric oxide synthase-III in reproductive organs of female rats during the oestrous cycle.

Constitutive endothelial nitric oxide synthase (NOS III) expression during the oestrous cycle was mapped immunocytochemically on 5 microns-thick paraffin sections of rat female reproductive organs. Ovarian NOS III immunoreactivity increased with follicular maturation (strongest in dioestrus corpora lutea), suggesting that nitric oxide may regulate folliculogenesis and luteal functions. Oviductal NOS III, localized in mucosal epithelium and muscular wall, was maximal during pro-oestrus and oestrus, suggesting that nitric oxide may impart periovulatory quiescence for reception, retention and fertilization of ovulated oocytes. Uterine NOS III, localized in endometrial and glandular epithelium, and in myometrial smooth muscle cells, was abundantly expressed during pro-oestrus and oestrus. The peri-implantation period in pregnant rats corresponds to the periovulatory period and the elevated NOS, and thus nitric oxide may provide uterine relaxation to facilitate embryo implantation following fertilization. Cervical NOS III, localized in the mucus-secreting epithelium and smooth muscle cells, exhibited enzyme abundance during pro-oestrus and oestrus, probably indicating cervical preparation to facilitate sperm entry following mating. Vaginal NOS III, found in the stratified squamous epithelial lining and in smooth muscle cells, was maximal during oestrus and pro-oestrus, suggesting that nitric oxide may stimulate vaginal secretions. Differential expression of NOS III by different reproductive organs during the oestrus cycle suggests a role for nitric oxide in modulating reproduction.

Immunocytochemical localization of nitric oxide synthase-III in reproductive organs of female rats during estrus cycle

Immunocytochemical localization of nitric oxide synthase-III in reproductive organs of female rats during estrus cycle

S-10-4 - Regulation of the PGF2-alpha metabolism by ovarian steroids in reproductive organs of female rats.

S-10-4 - Regulation of the PGF2-alpha metabolism by ovarian steroids in reproductive organs of female rats.

Effect of a pineal indolamine, 5-methoxyindole-3-acetic acid, on the estrous cycle and reproductive organs of female Wistar albino rats

It has been suggested that the pineal gland has a specific role in the control of cyclic sexual activity in rats. One or more of the compounds isolated from this gland have been considered to be possible anti-fertility agents. In this study, the effect of different doses of 5-methoxyindole-3-acetic acid (5-MIAA) on the estrous cycle and the reproductive organs of female rats was studied. Daily injections of either 100 or 200 μg of 5-MIAA significantly prolonged the estrous cycles of mature female rats. After injections of 5-MIAA, an increase in diestrous smears was observed; in addition, the animals had estrous cycles without proestrous phase. Following the injections of 200 μg of 5-MIAA, a significant increase in uterine weight, plasma 17β-estradiol level and in the number of follicles were observed, and after injections of 5-MIAA (50, 100, 200 μg) a medium level of plasma progesterone was obtained. Thus it is concluded that 5-MIAA has an effect on the ovulation process of female rats.

Carcinogenicity of picloram.

Two studies of the carcinogenicity of the herbicide picloram in animals were reviewed. Examination of histological sections showed that picloram is highly carcinogenic in rats and mice. Neoplasms at all sites, including malignant neoplasms, were increased in male and female rats given both low and high doses of picloram in the National Cancer Institute rat study. The malignant neoplasms were both carcinomas and sarcomas. Neoplasms of the endocrine organs, particularly carcinomas, were increased in male and female rats given picloram. These carcinomas were observed in the adrenal, thyroid, and pituitary glands. Neoplasms were also increased in the liver of male and female rats and in the reproductive organs of female rats given picloram. Male and female mice exposed to picloram developed neoplasms of the spleen in the National Cancer Institute mouse study. There were also toxic changes in rats and mice. Male rats had chronic renal disease, parathyroid hyperplasia, and polyarteritis. There was atrophy of the testes in both male rats and mice given picloram.

Effect of cyproterone acetate on the reproductive system of the female rat

Effects of cyproterone acetate, a synthetic steroidal compound, on the reproductive organs of female rats have been investigated. This agent caused reduction of ovarian weights indicative of suppression of pituitary gonadotrophins. Oestrogenic nature of cyproterone acetate was investigated in intact and ovariectomized rats taking uterine weight and vaginal keratinization as an index of oestrogenicity. Cyproterone acetate in ovariectomized animals induced vaginal keratinization and increased the uterine weights. These effects were parallel to the effect of oestradiol dipropionate in ovariectomized animals, thus indicating oestrogenic activity of cyproterone acetate. We may conclude that the above compound caused antifertility effects due to its oestrogenic nature at the dose level of 2 mg/alternate day in rats when the compound was administered subcutaneously.

Pineal-induced alterations in reproductive function and pituitary prolactin in the female rat: the effects of bilateral superior cervical ganglionectomy and nervi conarii transection.

The reproductive organs of female rats subjected to blinding and and anosmia were hypotrophic while pituitary prolactin stores were markedly depressed in these animals. All of the effects of dual sensory deprivation were reversed by either superior cervical ganglionectomy or nervi conarii transection. It was concluded that both of these surgical procedures were as effective as pinealectomy in reversing the pineal-induced alterations in the reproductive physiology of the blind-anosmic female rat.

Effect of dehydroepiandrosterone and delta4-androstenedione on the reproductive organs of female rats: production of cystic changes in the ovary.

Effect of Dehydroepiandrosterone and Δ4-Androstenedione on the Reproductive Organs of Female Rats: Production of Cystic Changes in the Ovary