Abstract：
OBJECTIVES:The aim of this study was to evaluate the effects of tamoxifen on the weight and thickness of the urethral epithelium of castrated female rats. METHODS:Forty castrated adult female Wistar-Hannover rats were randomly divided into two groups: Group I (n=20) in which the animals received only the vehicle (propylene glycol) and Group II (n=20) in which the rats received tamoxifen 250microg/day by gavage. After 30 days of treatment, all animals were sacrificed and the urethra was immediately removed for weighing. Next, the urethra was divided into the proximal and distal segments, which were fixed in 10% formaldehyde and submitted to routine histological techniques for morphometric study. The data were analyzed using the weighted minimum mean-square error method and Student's t-test for two independent samples (p<0.05). RESULTS:There was a significant increase in the mean weight of the urethra in the rats of Group II compared to the control group, 32.0+/-2.0mg and 22.0+/-1.6mg, respectively (p<0.001). The mean thickness of the distal urethral epithelium of the animals treated with tamoxifen was significantly greater than that of the control group, 42.8+/-2.0microm and 36.6+/-1.5microm, respectively (p<0.001). There was no statistically significant difference between the two groups with respect to the epithelial thickness of the proximal urethra (p=0.514). CONCLUSION:Treating castrated adult rats with 250microg/day of tamoxifen for 30 days may increase the weight of the urethra and the thickness of the distal urethral epithelium.
journal_name
Maturitasjournal_title
Maturitasauthors
dos Santos AR,Lopes-Costa PV,de Castro JC,Campos IC,Borges RS,Pires CG,Drumond KO,Alencar AP,da Silva BBdoi
10.1016/j.maturitas.2008.02.010subject
Has Abstractpub_date
2008-03-20 00:00:00pages
275-80issue
3eissn
0378-5122issn
1873-4111pii
S0378-5122(08)00072-8journal_volume
59pub_type
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