Testicular histomorphometry and the proliferative and apoptotic activities of the seminiferous epithelium in Syrian hamster during spontaneous recrudescence after exposure to short photoperiod

Reproduction in Domestic Animals = Zuchthygiene
Jesús Martínez-HernándezL M Pastor

Abstract

Syrian hamsters are photoperiodic rodents in which reproduction, including testicular function, is stimulated by long photoperiod exposure and curtailed by exposure to a short photoperiod. The objectives of this study were to characterize the testis histomorphometrically and to determine the role of the proliferation and apoptosis phenomena in the recovery of the seminiferous epithelium during spontaneous recrudescence after exposure to short photoperiod. The study was performed using conventional light microscopy, proliferating cell nuclear antigen and terminal deoxynucleotidyl transferase (TdT)-mediated dUTP in situ nick end labelling staining, image analysis software, and transmission electron microscopy in three recrudescence groups: initial recrudescence (IR), advanced recrudescence (AR) and total recrudescence (TR). The results morphometrically pointed to the gradual recovery of the testicular and tubular volumes, as well as of the seminiferous epithelium. Among the IR and AR groups, the increase in testicular and tubular volumes was accompanied by an increase in tubular diameter and length, with an increase in interstitial volume. From AR to TR, there was an increase in the tubular and total volumes, but, in this case, w...Continue Reading

References

Sep 1, 1987·Journal of Reproduction and Fertility·M K HollandB J Danzo
Mar 2, 1999·Reviews of Reproduction·A P Sinha Hikim, R S Swerdloff
Feb 13, 2001·Biology of Reproduction·K A YoungR J Nelson
Nov 3, 2001·Reproduction : the Official Journal of the Society for the Study of Fertility·K A Young, R J Nelson

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