Immunoexpressions of embryonic and nonembryonic stem cell markers (Nanog, Thy-1, c-kit) and cellular connections (connexin 43 and occludin) on testicular tissue in thyrotoxicosis rat model

2014 ◽  
Vol 34 (6) ◽  
pp. 601-611
Author(s):  
F Oltulu ◽  
H Aktug ◽  
A Uysal ◽  
N Turgan ◽  
G Oktem ◽  
...  

In this study, possible thyrotoxicosis-related histological changes in testicular tissues of rats with experimentally induced thyrotoxicosis model were evaluated on cellular connections and stem cell markers. Two experimental groups, thyrotoxicosis and control, each consisting of eight animals were used. Rats in the thyrotoxicosis group were injected intraperitoneally with 3,3′,5-triiodo-l-thyronine (50 µg/100 g body weight/day) for 10 days. At the end of the study, animals in both groups were anesthetized, and blood samples were collected for biochemical analyses. Their testes were dissected out and histological procedure was conducted to perform further histochemical, immunohistochemical analyses and tissue expression analysis by real-time polymerase chain reaction. Expression of the stem cell markers such as c-kit and Thy-1 significantly decreased in the testes of the thyrotoxicosis group compared with the control group; however, Nanog expression was not detected in any of the groups. Similarly, connexin 43 and occludin expressions were also found to be significantly lower in the thyrotoxicosis group. These results on cellular connections are supported with the tissue expression analysis. Our findings are indicative of supporting microenvironmental tissue decay rather than parenchyma damage, which has been actually ignored in the literature. In conclusion, experimental thyrotoxicosis model may have adverse effects on the cell junctional complexes, cell–cell interactions, and pluripotency capacity.

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Cagdas Sahin ◽  
Ozlem Yilmaz Dilsiz ◽  
Sirin Bakti Demiray ◽  
Ozgur Yeniel ◽  
Mete Ergenoglu ◽  
...  

Background. The aim of this study is to determine the effects of zinc and/or progesterone via the expression ofαvβ5 integrins and Vitronectins and embryonic stem cell markers during the peri-implantation period.Methods. Four experimental groups were organized. All subjects were mated with males of the same strain to induce pregnancy; after 5 days, zinc and/or progesterone were administered. Blood levels of zinc and progesterone were determined on the sixth day and endometrial tissues were obtained in order to evaluate the immunohistochemical expression of integrins and embryonic stem cell markers.Results. Theαvβ5 integrin and vitronectin expression increased in the zinc group compared with the control group and no difference in the progesterone group and zinc + progesterone group. Expression of Klf-4, Sox-2, and c-Myc was found to be increased in the zinc group compared to controls, while no difference was determined between the progesterone, zinc + progesterone, and control groups. Distinctively, expression of the embryonic stem cell marker Oct-4 was increased in all of the experimental groups.Conclusions. Expression ofαvβ5 integrin, vitronectin, and embryonic stem cell markers might be increased by the administration of zinc. Our results suggest that zinc could be useful in the induction of implantation rates.


The Prostate ◽  
2010 ◽  
Vol 71 (1) ◽  
pp. 18-25 ◽  
Author(s):  
Andrey V. Ugolkov ◽  
Laurie J. Eisengart ◽  
Chunyan Luan ◽  
Ximing J. Yang

2011 ◽  
Author(s):  
Moon Nian Lim ◽  
Umapathy Thiageswari ◽  
Othman Ainoon ◽  
P. J. N. Baharuddin ◽  
R. A. Jamal ◽  
...  

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