Ovariectomy in forty rats (<i>Rattus norvegicus</i>)

Sankar, P.; Veena, P.; Kumar, Raj; Lakshmi, N.; Kokila, S.

doi:10.5958/0976-0555.2014.00023.5

Cited by 2 publications

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“…Mice were ovariectomized using a ventral approach [62]. Animals were anesthetized using isoflurane (4% for induction and 2% for maintenance; IsoFlo, Esteve Veterinaria, Spain).…”

Section: Methodsmentioning

confidence: 99%

Estradiol Regulates Polysialylated Form of the Neural Cell Adhesion Molecule Expression and Connectivity of O-LM Interneurons in the Hippocampus of Adult Female Mice

et al. 2021

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The estrous cycle is caused by the changing concentration of ovarian hormones, particularly 17β-Estradiol, a hormone whose effect on excitatory circuits has been extensively reported. However, fewer studies have tried to elucidate how this cycle, or this hormone, affects the plasticity of inhibitory networks and the structure of interneurons. Among these cells, somatostatin expressing O-LM neurons of the hippocampus have a role in the modulation of theta oscillations, and they receive direct input from the entorhinal cortex, which place them in the center of hippocampal function. In this study, we report that the expression of PSA-NCAM in the hippocampus, a molecule involved in the plasticity of somatostatin expressing interneurons in the adult brain, fluctuated through the different stages of the estrous cycle. Likewise, these stages and the expression of PSA-NCAM affected the density of dendritic spines of O-LM cells. We also describe that 17β-Estradiol replacement of adult ovariectomized female mice caused an increase of the perisomatic inhibitory puncta on O-LM interneurons, as well as an increase in their axonal bouton density. Interestingly, this treatment also induced a decrease in their dendritic spine density, specifically in O-LM interneurons lacking PSA-NCAM expression. Finally, using an ex vivo real-time assay with entorhino-hippocampal organotypic cultures we show that this hormone decreased the dynamics in spinogenesis, altogether highlighting the modulatory effect that 17β-Estradiol has on inhibitory circuits.

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“…Mice were ovariectomized using a ventral approach [62]. Animals were anesthetized using isoflurane (4% for induction and 2% for maintenance; IsoFlo, Esteve Veterinaria, Spain).…”

Section: Methodsmentioning

confidence: 99%

Estradiol Regulates Polysialylated Form of the Neural Cell Adhesion Molecule Expression and Connectivity of O-LM Interneurons in the Hippocampus of Adult Female Mice

et al. 2021

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Estrous cycle and uterine weight of ovariectomized menopause female rat models after treatment with Leucaena leucocephala (Lam.) de Wit leaf extract

Ngurah Intan Wiratmini,

Anak Agung Sagung Alit Sukmaningsih,

Iriani Setyawati

2024

FMI

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Highlights:1. This study found that Leucaena leucocephala leaf ethanol extract has the ability to stimulate the growth of vaginal epithelial cells in ovariectomised rats.2. Leucaena leucocephala leaf extract can be developed as a safe and cost-effective natural alternative for hormone replacement therapy in premenopausal women and livestock. Highlights:1. This study found that Leucaena leucocephala leaf ethanol extract has the ability to stimulate the growth of vaginal epithelial cells in ovariectomised rats.2. Leucaena leucocephala leaf extract can be developed as a safe and cost-effective natural alternative for hormone replacement therapy in premenopausal women and livestock. Abstract Hormone replacement therapy has adverse effects that may cause additional health problems, such as hot flashes, cancer, ischemic stroke, and death. Phytoestrogen is an alternative ingredient used for hormone replacement therapy with less risk. The Leucaena leucocephala (Lam.) de Wit plant is widely used as a medicinal ingredient and animal feed. This study aimed to determine the effect of Leucaena leucocephala leaf extract on the uterine weight and estrous cycle of ovariectomized rats. This research used a completely randomized control design, which included two treatment groups (P1 and P2) and two control groups (negative (K-) and positive (K+)) with six replications in each group (n=24). The negative control (K-) was given 2 mL of corn oil, while K+ received 0.1 mg/kg bw of 17β-estradiol. P1 and P2 were administered 250 and 300 mg/kg bw of Leucaena leucocephala leaf extract, respectively. The extract was administered daily by gavage for 30 days. Estrous cycle data were obtained on day 31 by previously collecting vaginal swabs twice a day for 15 days. After the rats were sacrificed under anesthesia using chloroform, they underwent surgery to remove the uterine organs for weight measurement. The data were analyzed for normality and homogeneity using the Shapiro-Wilk and Levene tests. The data distribution were not normal, so the Kruskal Wallis test was used to test the hypothesis. If there was a difference between controls and treatments, the analysis continued with the Mann-Whitney test (p<0.05). The controls and treatments exhibited a significant difference in the length of each phase and overall estrous cycle. The post hoc Duncan test revealed that the highest uterine weight was found in 17β-estradiol treated rat. It was significantly different with both extracts treated rats. Both extract effect on uterine weight were not significantly difference. In conclusion, administering Leucaena leucocephala leaf extract results in an increased uterine weight and a normal estrous cycle in ovariectomized rats.

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Ovariectomy in forty rats (Rattus norvegicus)

Cited by 2 publications

References 0 publications

Estradiol Regulates Polysialylated Form of the Neural Cell Adhesion Molecule Expression and Connectivity of O-LM Interneurons in the Hippocampus of Adult Female Mice

Estradiol Regulates Polysialylated Form of the Neural Cell Adhesion Molecule Expression and Connectivity of O-LM Interneurons in the Hippocampus of Adult Female Mice

Estrous cycle and uterine weight of ovariectomized menopause female rat models after treatment with Leucaena leucocephala (Lam.) de Wit leaf extract

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