Vitamin B-12 Supplement Exerts a Beneficial Effect on the Seminiferous Epithelium of Cimetidine-Treated Rats

Vitamin B-12 Supplement Exerts a Beneficial Effect on the Seminiferous Epithelium of Cimetidine-Treated Rats

Author Beltrame, Flavia L. Autor UNIFESP Google Scholar
Caneguim, Breno H. Autor UNIFESP Google Scholar
Miraglia, Sandra M. Autor UNIFESP Google Scholar
Cerri, Paulo S. Google Scholar
Sasso-Cerri, Estela Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
São Paulo State Univ UNESP
Abstract Treatment of gastric ulcer with cimetidine reduces acid secretion and interferes in the vitamin B-12 absorption. Regarding the harmful effect of cimetidine on the seminiferous tubules, the aim of the present study was to verify if prolonged treatment with cimetidine causes vitamin B-12 deficiency and whether the testicular damages are attenuated by vitamin B-12 supplementation. Adult male rats received, for 50 days, cimetidine (CMTG), cimetidine and vitamin B-12 (CMT/B(12)G), vitamin B-12 (B(12)G) and saline solution (CG). Vitamin B-12 and homocysteine plasma levels were evaluated and the testes were embedded in glycol methacrylate for the morphometric analyses of total, epithelial and luminal areas of the seminiferous tubules, number of Sertoli cells and frequencies of tubules according to stages and containing Sertoli and germ cells in the lumen. Terminal deoxynucleotidyl-transferase mediated dUTP nick end labeling (TUNEL) method and proliferating cell nuclear antigen (PCNA) immunohistochemistry were carried out. CMTG showed TUNEL-positive Sertoli cells and significant reductions in the epithelial and total tu-bular areas, number of Sertoli cells and frequency of tubules VII-VIII. in the CMT/B(12)G, the number of Sertoli cells and the epithelial and total tubular areas were similar to CG. the number of Sertoli cells (in B(12)G) and the frequency of tubules at stages VII-VIII (in B(12)G and CMT/B(12)G) increased significantly; PCNA-positive Sertoli cells were found in these groups. Although cimetidine was not able to induce vitamin B-12 deficiency, this drug causes tubular atrophy due to Sertoli cell damage and loss of germ cells. However, vitamin B-12 supplement is able to stimulate spermatogenesis and restore the number of Sertoli cells, softening the harmful effect of cimetidine on spermatogenesis. Copyright (C) 2010 S. Karger AG, Basel
Keywords Testis
Histamine antagonist
Vitamin B-12
Morphometry
Spermatogenesis
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Grant number FAPESP: 06/54776-6
FAPESP: 07/53207-0
Date 2011-01-01
Published in Cells Tissues Organs. Basel: Karger, v. 193, n. 3, p. 184-194, 2011.
ISSN 1422-6405 (Sherpa/Romeo, impact factor)
Publisher Karger
Extent 184-194
Origin http://dx.doi.org/10.1159/000319371
Access rights Closed access
Type Article
Web of Science ID WOS:000287660900005
URI http://repositorio.unifesp.br/handle/11600/33325

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