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Artigos Originais
Effects of isoflavones on the adult rat myometrium
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(4):227-231
08-25-2006
Summary
Artigos OriginaisEffects of isoflavones on the adult rat myometrium
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(4):227-231
08-25-2006DOI 10.1590/S0100-72032006000400004
Views71See morePURPOSE: to evaluate histomorphometric changes in the rat myometrium upon treatment with isoflavones, as compared with estrogens, using histological and morphometric techniques. METHODS: twenty-eight oophorectomized adult rats were randomly divided into four treatment groups: GPropi = propylene glycol (control); GExtr10 - 10 mg/kg soybean extract; GExtr300 - 300 mg/kg soy bean extract; GCee - 200 µg/kg conjugated equine estrogens (Cee). Drugs or drug vehicle were administered by gavage once a day for 21 days. Upon sacrifice, the uteri were removed and weighed. Fragments of uterine horns were collected and fixed in 10% formaldehyde and processed for paraffin inclusion. The histological sections were stained by hematoxylin and eosin and evaluated microscopically by means of an image analyzer to quantify the myometrial thickness and the number of blood vessels and eosinophils. The data were studied by analysis of variance (ANOVA) followed by the Tukey-Kramer multiple comparison test. RESULTS: isoflavones in the concentration of 300 mg/kg induced a significant increase in the myometrium thickness (GExtr300=25.6±5.0 mm) compared to control (GPropi=5.5±0.5 mm). The effect of this high dose is similar to the estrogen effect (GCee=27.5±7.9 mm). In low doses (10 mg/kg), the effect was similar to control. Isoflavones (GExtr300) induced also an increase in the number of blood vessels (GPropi=3.5±1.6; GExtr300=10.2±3.6 vessels/mm²) and of eosinophils (CPropi=0.15±0.01; GExtr300=4.3±0.9 eosinophils/mm²). These effects were comparable to those produced by Cee treatment in GCee (9.2±1.1 eosinophils/mm²). CONCLUSION: a high-dose treatment with isoflavones (300 mg/kg per day, 21 days) elicited an estrogen-like, highly significant proliferative action on the rat myometrium.
Views71
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Summary
Artigos OriginaisEffects of isoflavones on the adult rat myometrium
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(4):227-231
08-25-2006DOI 10.1590/S0100-72032006000400004
Views71See morePURPOSE: to evaluate histomorphometric changes in the rat myometrium upon treatment with isoflavones, as compared with estrogens, using histological and morphometric techniques. METHODS: twenty-eight oophorectomized adult rats were randomly divided into four treatment groups: GPropi = propylene glycol (control); GExtr10 - 10 mg/kg soybean extract; GExtr300 - 300 mg/kg soy bean extract; GCee - 200 µg/kg conjugated equine estrogens (Cee). Drugs or drug vehicle were administered by gavage once a day for 21 days. Upon sacrifice, the uteri were removed and weighed. Fragments of uterine horns were collected and fixed in 10% formaldehyde and processed for paraffin inclusion. The histological sections were stained by hematoxylin and eosin and evaluated microscopically by means of an image analyzer to quantify the myometrial thickness and the number of blood vessels and eosinophils. The data were studied by analysis of variance (ANOVA) followed by the Tukey-Kramer multiple comparison test. RESULTS: isoflavones in the concentration of 300 mg/kg induced a significant increase in the myometrium thickness (GExtr300=25.6±5.0 mm) compared to control (GPropi=5.5±0.5 mm). The effect of this high dose is similar to the estrogen effect (GCee=27.5±7.9 mm). In low doses (10 mg/kg), the effect was similar to control. Isoflavones (GExtr300) induced also an increase in the number of blood vessels (GPropi=3.5±1.6; GExtr300=10.2±3.6 vessels/mm²) and of eosinophils (CPropi=0.15±0.01; GExtr300=4.3±0.9 eosinophils/mm²). These effects were comparable to those produced by Cee treatment in GCee (9.2±1.1 eosinophils/mm²). CONCLUSION: a high-dose treatment with isoflavones (300 mg/kg per day, 21 days) elicited an estrogen-like, highly significant proliferative action on the rat myometrium.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. -
Artigos Originais
Effects of combined estrogen and raloxifene therapy on rat endometrium
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(2):101-106
08-16-2006
Summary
Artigos OriginaisEffects of combined estrogen and raloxifene therapy on rat endometrium
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(2):101-106
08-16-2006DOI 10.1590/S0100-72032006000200005
Views56See morePURPOSE: to evaluate the effects of conjugated equine estrogens (CEE) and raloxifene (Ral), alone or combined, on the rat endometrium. METHODS: fifty-six adult rats were ovariectomized and randomly divided into seven groups: GCont (control); GCEE (CEE 50 µg/kg); GCEE/25 (CEE 25 µg/kg); GRal/0.75 (Ral 0.75 mg/kg); GRal/0.4 (Ral 0.4 mg/kg); GCEERal (50/0.75) - (CEE 50 µg/kg + Ral 0.75 mg/kg), and GCEE-Ral (25/0.4) - (CEE 25 µg/kg + Ral 0.4 mg/kg). The drugs were orally administered (gavage) for 21 consecutive days. At the end of the experiment, all animals were anesthetized and sacrificed. Fragments of uterus were removed, fixed in 10% formaldehyde and processed for paraffin inclusion. The histological sections were stained by HE and submitted to histomorphometric evaluation. The following parameters were analyzed: thickness of superficial epithelium and number of endometrial glands/mm² and of blood vessels/mm². The data were evaluated using ANOVA followed by the Turkey-Kramer test. RESULTS: in the GCont and only Ral treatment (GRal/0.75 and GRal/0.4) the endometrium showed signals of atrophy. In the groups treated with only CEE signs of endometrial proliferation were observed, mainly in group GCEE/50. Also, there was endometrial proliferation in the groups that received combined CEE and Ral (Ral GCEE (50/0.75) and GCEE-Ral (25/0.4)), but it was more intensive in the animals treated with isolated estrogen than in those that received combined estrogen and raloxifene. CONCLUSION: raloxifene may partially block the action of estrogen on the castrated adult rat endometrium.
Views56This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Summary
Artigos OriginaisEffects of combined estrogen and raloxifene therapy on rat endometrium
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(2):101-106
08-16-2006DOI 10.1590/S0100-72032006000200005
Views56See morePURPOSE: to evaluate the effects of conjugated equine estrogens (CEE) and raloxifene (Ral), alone or combined, on the rat endometrium. METHODS: fifty-six adult rats were ovariectomized and randomly divided into seven groups: GCont (control); GCEE (CEE 50 µg/kg); GCEE/25 (CEE 25 µg/kg); GRal/0.75 (Ral 0.75 mg/kg); GRal/0.4 (Ral 0.4 mg/kg); GCEERal (50/0.75) - (CEE 50 µg/kg + Ral 0.75 mg/kg), and GCEE-Ral (25/0.4) - (CEE 25 µg/kg + Ral 0.4 mg/kg). The drugs were orally administered (gavage) for 21 consecutive days. At the end of the experiment, all animals were anesthetized and sacrificed. Fragments of uterus were removed, fixed in 10% formaldehyde and processed for paraffin inclusion. The histological sections were stained by HE and submitted to histomorphometric evaluation. The following parameters were analyzed: thickness of superficial epithelium and number of endometrial glands/mm² and of blood vessels/mm². The data were evaluated using ANOVA followed by the Turkey-Kramer test. RESULTS: in the GCont and only Ral treatment (GRal/0.75 and GRal/0.4) the endometrium showed signals of atrophy. In the groups treated with only CEE signs of endometrial proliferation were observed, mainly in group GCEE/50. Also, there was endometrial proliferation in the groups that received combined CEE and Ral (Ral GCEE (50/0.75) and GCEE-Ral (25/0.4)), but it was more intensive in the animals treated with isolated estrogen than in those that received combined estrogen and raloxifene. CONCLUSION: raloxifene may partially block the action of estrogen on the castrated adult rat endometrium.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. -
Artigos Originais
Placebo-controlled clinical trial with soy isoflavones for depressive symptoms in climacteric women
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(2):91-100
08-16-2006
Summary
Artigos OriginaisPlacebo-controlled clinical trial with soy isoflavones for depressive symptoms in climacteric women
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(2):91-100
08-16-2006DOI 10.1590/S0100-72032006000200004
Views97See morePURPOSE: to evaluate the efficacy of the use of isoflavones in the treatment of depressive symptoms in climacteric women. METHODS: placebo-controlled, randomized double-blind experimental study with 84 climacteric women who were assisted at the Lauro Wanderley University Hospital Ambulatory, in João Pessoa, Paraíba, Brazil. In the evaluation of the depressive symptoms the Self-evaluation questionnare of Hamilton's rating scale for depresion (QAEH-D) was used in the pretreatment visit (VT1), and in the 8th (VT2) and 16th (VT3) week after treatment. The experimental group (GExp) received soy extract with isoflavones, 120 mg per day, and the control group (GCont), placebo. The comparison of the scores of the QAEH-D between the VT1, VT2 and VT3 groups constituted the primary measure of efficacy (t test, p<0.05). Secondary analysis included the estimate of the "domino hypothesis" and the clinical and laboratory evaluation of side effects. RESULTS: there was a significant reduction of the QAEH-D scores in the GExp (VT2
Views97This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Summary
Artigos OriginaisPlacebo-controlled clinical trial with soy isoflavones for depressive symptoms in climacteric women
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(2):91-100
08-16-2006DOI 10.1590/S0100-72032006000200004
Views97See morePURPOSE: to evaluate the efficacy of the use of isoflavones in the treatment of depressive symptoms in climacteric women. METHODS: placebo-controlled, randomized double-blind experimental study with 84 climacteric women who were assisted at the Lauro Wanderley University Hospital Ambulatory, in João Pessoa, Paraíba, Brazil. In the evaluation of the depressive symptoms the Self-evaluation questionnare of Hamilton's rating scale for depresion (QAEH-D) was used in the pretreatment visit (VT1), and in the 8th (VT2) and 16th (VT3) week after treatment. The experimental group (GExp) received soy extract with isoflavones, 120 mg per day, and the control group (GCont), placebo. The comparison of the scores of the QAEH-D between the VT1, VT2 and VT3 groups constituted the primary measure of efficacy (t test, p<0.05). Secondary analysis included the estimate of the "domino hypothesis" and the clinical and laboratory evaluation of side effects. RESULTS: there was a significant reduction of the QAEH-D scores in the GExp (VT2
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. -
Artigos Originais
Morphological and molecular effects of isoflavone and estrogens on the rat mammary gland
Revista Brasileira de Ginecologia e Obstetrícia. 2005;27(4):204-209
07-30-2005
Summary
Artigos OriginaisMorphological and molecular effects of isoflavone and estrogens on the rat mammary gland
Revista Brasileira de Ginecologia e Obstetrícia. 2005;27(4):204-209
07-30-2005DOI 10.1590/S0100-72032005000400007
Views122See morePURPOSE: to analyze the effects of isoflavones and estrogens on the morphology, morphometry and VEGF expression of the adult female rat mammary gland. METHODS: Forty-five adult female rats were oophorectomized; 28 days after surgery they were divided into 3 groups of 15 animals each: CON - control (treated with propylenoglycol); ISO - isoflavones (100 mg/kg) and CEE - conjugated equine estrogens (50 µg/Kg). Drugs or vehicle were given orally once a day for 60 days. After this, the animals were killed and the first pair of inguinal mammary glands was immediately removed; part of the material was processed for routine histological study and the remaining tissue was frozen for further analyses of the expression of VEGF mRNA by means of the RT-PCR technique. RESULTS: We observed that mammary ducts were atrophic in the control (CON) and isoflavone-treated (ISO) groups. In these groups the mammary glands were composed of a large concentration of adipose tissue with some ducts and rare alveolar structures. In the CEE group the ducts were well developed with many buds and alveolar structures. The number of mammary gland alveoli was higher in CEE than in the other groups (CON = 1.4 ± 2.1; ISO = 1.6 ± 3.8; CEE = 12.3 ± 7.1 alveoli/mm²; p<0.05%); also, the cell volume was higher (CON = 14.9 ± 4.9; ISO = 11.4 ± 6.9; CEE = 27.4 ± 9.7 µm³, p< 0.05%). The same was observed with regard to the number of blood vessels (CON = 16.4 ± 1.5; ISO = 18.4 ± 2.1; CEE = 37.1 ± 4.1 vessels/mm², p< 0.05). The expression of VEGF in the CEE group was higher than in the other groups, which did not significantly differ from each other in this respect. CONCLUSION: Our data did not show any proliferation effect in the mammary tissue of adult oophorectomized rats treated with isoflavones (100 mg/kg) during 60 days.
Views122This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Summary
Artigos OriginaisMorphological and molecular effects of isoflavone and estrogens on the rat mammary gland
Revista Brasileira de Ginecologia e Obstetrícia. 2005;27(4):204-209
07-30-2005DOI 10.1590/S0100-72032005000400007
Views122See morePURPOSE: to analyze the effects of isoflavones and estrogens on the morphology, morphometry and VEGF expression of the adult female rat mammary gland. METHODS: Forty-five adult female rats were oophorectomized; 28 days after surgery they were divided into 3 groups of 15 animals each: CON - control (treated with propylenoglycol); ISO - isoflavones (100 mg/kg) and CEE - conjugated equine estrogens (50 µg/Kg). Drugs or vehicle were given orally once a day for 60 days. After this, the animals were killed and the first pair of inguinal mammary glands was immediately removed; part of the material was processed for routine histological study and the remaining tissue was frozen for further analyses of the expression of VEGF mRNA by means of the RT-PCR technique. RESULTS: We observed that mammary ducts were atrophic in the control (CON) and isoflavone-treated (ISO) groups. In these groups the mammary glands were composed of a large concentration of adipose tissue with some ducts and rare alveolar structures. In the CEE group the ducts were well developed with many buds and alveolar structures. The number of mammary gland alveoli was higher in CEE than in the other groups (CON = 1.4 ± 2.1; ISO = 1.6 ± 3.8; CEE = 12.3 ± 7.1 alveoli/mm²; p<0.05%); also, the cell volume was higher (CON = 14.9 ± 4.9; ISO = 11.4 ± 6.9; CEE = 27.4 ± 9.7 µm³, p< 0.05%). The same was observed with regard to the number of blood vessels (CON = 16.4 ± 1.5; ISO = 18.4 ± 2.1; CEE = 37.1 ± 4.1 vessels/mm², p< 0.05). The expression of VEGF in the CEE group was higher than in the other groups, which did not significantly differ from each other in this respect. CONCLUSION: Our data did not show any proliferation effect in the mammary tissue of adult oophorectomized rats treated with isoflavones (100 mg/kg) during 60 days.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. -
Trabalhos Originais
Ductal carcinoma in situ and invasive carcinoma in the same breast: evaluation of the nuclear grade and the expressions of proteins p53 and C-erbB-2 and estrogen receptors
Revista Brasileira de Ginecologia e Obstetrícia. 2004;26(6):435-439
09-02-2004
Summary
Trabalhos OriginaisDuctal carcinoma in situ and invasive carcinoma in the same breast: evaluation of the nuclear grade and the expressions of proteins p53 and C-erbB-2 and estrogen receptors
Revista Brasileira de Ginecologia e Obstetrícia. 2004;26(6):435-439
09-02-2004DOI 10.1590/S0100-72032004000600003
Views41See moreOBJECTIVES: The aim of the present study was to evaluate the nuclear grade, the expressions of p53 and c-erbB-2 proteins, and the estrogen receptors (ER) of 38 women with ductal carcinoma in situ (DCIS) and invasive carcinoma of the same breast. METHODS: the protein profile of 38 women was investigated in a descriptive and retrospective study, through the immune-histochemical technique. The cut-off limit for positive staining was chosen at 10% or more of positive cells for p53 and c-erbB-2 proteins and for ER. The analysis of the concordance between the expressions of proteins and the nuclear grade was done by the kappa coefficient, according to Landis and Koch's criteria. MacNemar's test was used to assess the differences between the two groups. RESULTS: there was a perfect concordance in the expression of p53 proteins (kappa coefficient = 1.00) and almost a perfect concordance for c-erbB-2 proteins, ER and nuclear grade (kappa coefficients = 0.84, 0.89 and 0.89) between in situ and invasive elements of the same tumor. CONCLUSION: there was no difference between the expressions of p53 and c-erbB-2 proteins, ER and nuclear grade in the DCIS and invasive carcinoma of the same breast.
Views41This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Summary
Trabalhos OriginaisDuctal carcinoma in situ and invasive carcinoma in the same breast: evaluation of the nuclear grade and the expressions of proteins p53 and C-erbB-2 and estrogen receptors
Revista Brasileira de Ginecologia e Obstetrícia. 2004;26(6):435-439
09-02-2004DOI 10.1590/S0100-72032004000600003
Views41See moreOBJECTIVES: The aim of the present study was to evaluate the nuclear grade, the expressions of p53 and c-erbB-2 proteins, and the estrogen receptors (ER) of 38 women with ductal carcinoma in situ (DCIS) and invasive carcinoma of the same breast. METHODS: the protein profile of 38 women was investigated in a descriptive and retrospective study, through the immune-histochemical technique. The cut-off limit for positive staining was chosen at 10% or more of positive cells for p53 and c-erbB-2 proteins and for ER. The analysis of the concordance between the expressions of proteins and the nuclear grade was done by the kappa coefficient, according to Landis and Koch's criteria. MacNemar's test was used to assess the differences between the two groups. RESULTS: there was a perfect concordance in the expression of p53 proteins (kappa coefficient = 1.00) and almost a perfect concordance for c-erbB-2 proteins, ER and nuclear grade (kappa coefficients = 0.84, 0.89 and 0.89) between in situ and invasive elements of the same tumor. CONCLUSION: there was no difference between the expressions of p53 and c-erbB-2 proteins, ER and nuclear grade in the DCIS and invasive carcinoma of the same breast.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Estrogens Archives - Revista Brasileira de Ginecologia e Obstetrícia
