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• W2037509740 abstract "You have accessJournal of UrologySexual Function/Dysfunction/Andrology: Basic Research (I)1 Apr 2013812 AGE-RELATED CHANGES IN THE CONCENTRATION OF ELASTIC FIBERS IN DIFFERENT REGIONS OF THE RABBIT PENIS Luiz E.M. Cardoso, Waldemar Costa, Maurício Chagas, Marcelo Abidu-Figueiredo, and Francisco Sampaio Luiz E.M. CardosoLuiz E.M. Cardoso Rio de Janeiro, Brazil More articles by this author , Waldemar CostaWaldemar Costa Rio de Janeiro, Brazil More articles by this author , Maurício ChagasMaurício Chagas Niteroi, Brazil More articles by this author , Marcelo Abidu-FigueiredoMarcelo Abidu-Figueiredo Seropedica, Brazil More articles by this author , and Francisco SampaioFrancisco Sampaio Rio de Janeiro, Brazil More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2013.02.378AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES Elastic fibers are located in the different regions of the penis and play important roles in erection [Udelson. J R Soc Interface 2007;4:1031]. Notably, they are altered in erectile dysfunction and in the penis of aged individuals [Akkus et al. Br J Urol 1997;79:47]. For studies on penile structure, function, and disorders, the rabbit penis is particularly suitable, but data on elastic fibers in this tissue is only available for young adult animals [Maia et al. Int J Imp Res 2006;18:121]. Thus, it is unclear whether penile elastic fibers change with age in this important animal model. We therefore investigated whether the concentration of elastic fibers in the corpus cavernosum (CC), corpus spongiosum (CS) and tunica albuginea (TA) of the rabbit penis undergo modifications with age, especially with the onset of senescence. METHODS New Zealand rabbits were sacrificed, in groups of ten animals each, at 30, 120, 240, and 730 days of age. The middle shaft of the penis was then formalin-fixed and embedded in paraffin. Histological sections were stained with a Weigert's resorsin fuchsin method which stains all types of elastic fibers. The relative content of of elastic fibers was then separately determined in the CC, CS, and TA using stereological methods, and was expressed as volume fraction. Results were analyzed by one-way ANOVA and the Bonferroni procedure. RESULTS At 730 days of age, the concentration of elastic fibers was increased by 54% (p<0.004), 78% (p<0.004), and 87% (p<0.004) in the TA, CC and CS, respectively, compared with animals aged 30 days. Additionally, from 30 days of age onward, the concentration gradually and significantly increased until 240 days of age. In 730-day old animals, however, the concentration, compared with the previous age group, was unchanged in the CC and decreased by 20% in the TA (p<0.004). CONCLUSIONS The different regions of the rabbit penis contain different concentrations of elastic fibers, which correlate with properties of penile tissues. Although from one month of age onward there is a gradual increase in these concentrations, in two-year old animals this trend is already interrupted, which suggests that this could be an early alteration due to senescence. © 2013 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 189Issue 4SApril 2013Page: e334 Advertisement Copyright & Permissions© 2013 by American Urological Association Education and Research, Inc.MetricsAuthor Information Luiz E.M. Cardoso Rio de Janeiro, Brazil More articles by this author Waldemar Costa Rio de Janeiro, Brazil More articles by this author Maurício Chagas Niteroi, Brazil More articles by this author Marcelo Abidu-Figueiredo Seropedica, Brazil More articles by this author Francisco Sampaio Rio de Janeiro, Brazil More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ..." @default.
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