Past Issue

Volume 11, Number 3, Oct-Dec 2017 Pages: 148-155

Comparative Expression Analysis of HSP70, HSP90, IL-4, TNF, KITLG and KIT-receptor Gene between Varicocele-Induced and Non-Varicocele Testes of Dog

Hossein Hassanpour, Ph.D, 1, *, Amin Bigham Sadegh, Ph.D, 2, Iraj Karimi, Ph.D, 3, Heidar Heidari Khoei, D.V.M, 1, Azarnoush Karimi, D.V.M, 1, Parinaz Edalati Shaarbaf, D.V.M, 4, Tahereh Karimi Shayan, M.Sc, 1,
Research Institute of Animal Embryo Technology, Shahrekord University, Shahrekord, Iran
Department of Veterinary Surgery and Radiology, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
Department of Pathobiology, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
Department of Veterinary Medicine, Science and Research Branch, Islamic Azad University, Tehran, Iran
*Corresponding Address: P.O.Box: 115 Research Institute of Ani- mal Embryo Technology Shahrekord University Shahrekord Iran



This study was designed to create an experimental varicocele model by a simple surgical procedure in dog with minimum invasion and to investigate the effect of varicocele-induced infertility on the expression of six related genes (HSP90, HSP70, IL-4, TNF, KITLG and KIT receptor).

Materials and Methods

In this experimental study, the proximal part of the pampini-form plexus of dog testes was partially occluded without abdominal incision which was confirmed by venographic examination. To evaluate varicocele in its acute form, dogs were castrated after 15 days and testes were dissected. Histopathologic evaluation was undertaken and the relative expression of the six genes was assessed by quantitative realtime polymerase chain reaction (PCR).


Microscopic changes showed tubule degeneration. The Johnson score was significantly decreased in the varicocele testes when compared with non-varicocele testes. Expressions of HSP90, TNF, KITLG and the KIT-receptor gene were significantly downregulated (P=0.029, 0.047, 0.004 and 0.035 respectively) in varicocele-induced testes while HSP70 was upregulated (P=0.018). IL-4 did not show differential expression (P=0.377).


We conclude that partial occlusion of the proximal part of the pampiniform plexus induces varicocele in the testis of dog. Differential expression of the mentioned genes may be responsible for the pathophysiology of varicocele and related subfertility.