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Morphological alterations and distribution of occludin in rat testes after bilateral vasectomy
Authors:Gazi ContukOya Orun  Emel Demiralp-Ek?io?luFeriha Ercan
Institution:a Department of Histology and Embryology, School of Medicine, Marmara University, Haydarpasa, 34688 Istanbul, Turkey
b Department of Biophysics, School of Medicine, Marmara University, Istanbul, Turkey
c Department of Hematology and Immunology, School of Medicine, Marmara University, Istanbul, Turkey
Abstract:The aim of study was to investigate the fate and the morphology of the cells which constitute the spermatogenic line, and to determine the distribution of occludin in the testis in adult vasectomized Wistar rats. The rats were divided into two groups: control group (sham-operated) and vasectomized group. One, 3 and 6 months after sham and vasectomy operations, testis samples were examined. The weight of the testes was found to be reduced 3 and 6 months after vasectomy. There was vacuolization in the seminiferous tubules one month after vasectomy. The tubules showed severe atrophy 3 and 6 months after vasectomy. The occludin immunolabeling in the 3- and 6-month groups was weak and diffuse, and the density of the protein was found to be decreased. The increase in the number of apoptotic cells was accompanied by a time-dependent decrease in the number of haploid, diploid and tetraploid cells. This study demonstrated that vasectomy causes degeneration in the seminiferous tubules with alterations in occludin distribution with a decrease in the number of spermatogenic cells. Moreover, these alterations increase in a time-dependent manner.
Keywords:AEC  3-amino-9-ethylcarbazole  ANOVA  analysis of variance  Ca2+  calcium ions  cAMP  cyclic adenosine monophosphate  DNA  deoxyribonucleic acid  H&  E  hematoxylin and eosin  H2O2  hydrogen peroxide  IgG  immunoglobulin G  kDa  kiloDalton  kV  kiloVolt  NIH  National Institutes of Health  NTB/BCIP  nitro blue tetrazolium/5-bromo-4-chloro-3-indolyl phosphate  PAS  periodic acid-Schiff  PBS  phosphate buffered saline  PMSF  phenylmethylsulfonyl fluoride  SDS-PAGE  sodium dodecyl sulfate polyacrylamide gel electrophoresis  SEM  standard error of the mean  TdT  terminal deoxynucleotidyl transferase  TEM  transmission electron microscopy  Tris-HCl  2-amino-2-(hydroxymethyl)-1  3-propanediol hydrochloride  TUNEL  terminal deoxynucleotidyl transferase dUTP nick end labeling  ZO-1  Zona occludens-1  ZO-2  Zona occludens-2
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