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Revista Brasileira de Ginecologia e Obstetrícia. 2013;35(4):159-163
DOI 10.1590/S0100-72032013000400005
PURPOSE: To evaluate the effects of electrical stimulation (ES) of the pelvic floor on the urethra of female rats. METHODS: Forty adult rats were divided at random into four groups of ten animals each: Ctrl - without intervention; Sham - not submitted to ES, but with an electrode inserted into the vagina; Exp6 - submitted to six sessions of ES of the pelvic floor, and Exp12 - submitted to 12 sessions of ES of the pelvic floor. At the end of the experiment, all animals were anesthetized and the middle third of the urethra was removed, fixed in Bouin's fluid and processed for histomorphometric study. Sections were stained with hematoxylin and eosin for morphological and morphometric description, and others were stained with picrosirius red for the quantitation of total collagen. The thicknesses of the muscle layer and of the epithelium were determined, in 4 quadrants of the urethra, by performing 20 measurements per animal. The number of blood vessels present in the lamina propria was counted in the four quadrants over an area of 10³ µm² per quadrant and the images were obtained using the image analysis program AxioVision® REL 4.3 (Carl Zeiss). The collagen and muscle fiber ratios in the urethrae were calculated from two images per quadrant of every slice stained with picrosirius red, employing the Imagelab® Program. Data were subjected to analysis of variance (ANOVA) and the Tukey-Kramer multiple comparison test (p<0.05). RESULTS: The morphometry of the collagen, number of blood vessels and thickness of the epithelium showed no significant changes; however, the thickness of the periurethral muscle tissue increased significantly in Exp12 group, compared to the other groups (Exp12*>Exp6==Ctrl==Sham; *p<0.05). CONCLUSION: Prolonged functional electric stimulation of the pelvic floor induced an increase in periurethral muscle thickness in rats.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2013;35(4):159-163
DOI 10.1590/S0100-72032013000400005
PURPOSE: To evaluate the effects of electrical stimulation (ES) of the pelvic floor on the urethra of female rats. METHODS: Forty adult rats were divided at random into four groups of ten animals each: Ctrl - without intervention; Sham - not submitted to ES, but with an electrode inserted into the vagina; Exp6 - submitted to six sessions of ES of the pelvic floor, and Exp12 - submitted to 12 sessions of ES of the pelvic floor. At the end of the experiment, all animals were anesthetized and the middle third of the urethra was removed, fixed in Bouin's fluid and processed for histomorphometric study. Sections were stained with hematoxylin and eosin for morphological and morphometric description, and others were stained with picrosirius red for the quantitation of total collagen. The thicknesses of the muscle layer and of the epithelium were determined, in 4 quadrants of the urethra, by performing 20 measurements per animal. The number of blood vessels present in the lamina propria was counted in the four quadrants over an area of 10³ µm² per quadrant and the images were obtained using the image analysis program AxioVision® REL 4.3 (Carl Zeiss). The collagen and muscle fiber ratios in the urethrae were calculated from two images per quadrant of every slice stained with picrosirius red, employing the Imagelab® Program. Data were subjected to analysis of variance (ANOVA) and the Tukey-Kramer multiple comparison test (p<0.05). RESULTS: The morphometry of the collagen, number of blood vessels and thickness of the epithelium showed no significant changes; however, the thickness of the periurethral muscle tissue increased significantly in Exp12 group, compared to the other groups (Exp12*>Exp6==Ctrl==Sham; *p<0.05). CONCLUSION: Prolonged functional electric stimulation of the pelvic floor induced an increase in periurethral muscle thickness in rats.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2009;31(8):385-390
DOI 10.1590/S0100-72032009000800003
PURPOSE: to evaluate the effect of hyperprolactinemia induced by metoclopramide on the endometrium and myometrium of female mice in the proestrus phase. METHODS: 24 female mice were randomly divided in two groups: CtrG/control and ExpG/treated with metoclopramide (6.7 mg/g daily). After 50 days, the animals were sacrificed in the proestrus phase, and the blood was collected to determine the levels of estradiol, progesterone and prolactin. The uterine horns were removed, fixed in 10% formaldehyde and processed before being included in paraffin. Slices of 4 µm were stained by hematoxylin and eosin (H/E). In the morphological analysis, a Carl Zeiss light microscope, with objectives varying from 4 to 400 X was used for each histological slice characterization. In the morphometrical analysis, the superficial epithelium, the lamina propria and the myometrium thickness were evaluated, with the help of an image analyzer (AxionVision - Carl Zeiss) attached to the light microscope (Carl Zeiss). The statistical analysis was done by ANOVA, followed by the Wilcoxon test. P-value was considered as significant, when <0.05. RESULTS: our findings have shown an increase in the seric levels of prolactin (295.6±38.0 ng/mL) and significant decrease in the progesterone levels (11.3±0.9 ng/mL) in the ExpG, as compared to the CtrG (45.5±5.2 ng/mL and 18.2±1.6 ng/mL, respectively; p<0.001). Concerning the seric level of estradiol, significant differences between the groups were not obtained (ExpG=119.1±12.3 pg/mL and CtrG=122.7±8.4 pg/mL; p=0.418). The morphological study has shown that the uterus from the ExpG presented the endometrium with more developed superficial epithelium and lamina propria, as compared to the CtrG, the same happening with the myometrium. The thickness morphometrical values of the luminal epithelium (8.0±1.1 µm) and endometrium (116.2±21.1x10² µm) from the CtrG were lower than the ones from the ExpG (10.2±0.8 µm and 163.2±23.3x10² µm, respectively) with p<0.05. Nevertheless, data obtained in the myometrium have not shown significant differences between the groups (CtrG=152.2±25.2x10² µm and ExpG=140.8±18.0x10² µm). CONCLUSIONS: data have shown that hyperprolactinemia induced by metoclopramide determines endometrial proliferation and interferes with the ovarian function, mainly in the progesterone production.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2009;31(8):385-390
DOI 10.1590/S0100-72032009000800003
PURPOSE: to evaluate the effect of hyperprolactinemia induced by metoclopramide on the endometrium and myometrium of female mice in the proestrus phase. METHODS: 24 female mice were randomly divided in two groups: CtrG/control and ExpG/treated with metoclopramide (6.7 mg/g daily). After 50 days, the animals were sacrificed in the proestrus phase, and the blood was collected to determine the levels of estradiol, progesterone and prolactin. The uterine horns were removed, fixed in 10% formaldehyde and processed before being included in paraffin. Slices of 4 µm were stained by hematoxylin and eosin (H/E). In the morphological analysis, a Carl Zeiss light microscope, with objectives varying from 4 to 400 X was used for each histological slice characterization. In the morphometrical analysis, the superficial epithelium, the lamina propria and the myometrium thickness were evaluated, with the help of an image analyzer (AxionVision - Carl Zeiss) attached to the light microscope (Carl Zeiss). The statistical analysis was done by ANOVA, followed by the Wilcoxon test. P-value was considered as significant, when <0.05. RESULTS: our findings have shown an increase in the seric levels of prolactin (295.6±38.0 ng/mL) and significant decrease in the progesterone levels (11.3±0.9 ng/mL) in the ExpG, as compared to the CtrG (45.5±5.2 ng/mL and 18.2±1.6 ng/mL, respectively; p<0.001). Concerning the seric level of estradiol, significant differences between the groups were not obtained (ExpG=119.1±12.3 pg/mL and CtrG=122.7±8.4 pg/mL; p=0.418). The morphological study has shown that the uterus from the ExpG presented the endometrium with more developed superficial epithelium and lamina propria, as compared to the CtrG, the same happening with the myometrium. The thickness morphometrical values of the luminal epithelium (8.0±1.1 µm) and endometrium (116.2±21.1x10² µm) from the CtrG were lower than the ones from the ExpG (10.2±0.8 µm and 163.2±23.3x10² µm, respectively) with p<0.05. Nevertheless, data obtained in the myometrium have not shown significant differences between the groups (CtrG=152.2±25.2x10² µm and ExpG=140.8±18.0x10² µm). CONCLUSIONS: data have shown that hyperprolactinemia induced by metoclopramide determines endometrial proliferation and interferes with the ovarian function, mainly in the progesterone production.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(9):567-567
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(9):567-567