Sains Malaysiana 47(10)(2018): 2509–2517

http://dx.doi.org/10.17576/jsm-2018-4710-28

 

Testosterone Down-Regulates Expression of αvβ3-Integrin, E-Cadherin and Mucin-1 during Uterine Receptivity Period in Rats

(Testosteron Menindas Ekspresi αvβ3-Integrin, E-Cadherin dan Mucin-1 semasa Tempoh Reseptif Rahim dalam Tikus)

 

HELMY MOHD MOKHTAR1*, NELLI GIRIBABU2 & NAGUIB SALLEH2*

 

1Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Center, Jalan Yaacob Latiff, Bandar Tun Razak, 56000 Cheras, Kuala Lumpur, Federal Territory, Malaysia

 

2Department of Physiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Federal Territory, Malaysia

 

Received: 27 March 2018/Accepted: 20 June 2018

 

ABSTRACT

Adequate development of uterine receptivity is crucial for establishment of pregnancy. Expression of uterine receptivity molecules i.e. αvβ3 integrin, E-cadherin and mucin-1 could be affected by testosterone. The objective of this study was to investigate effect of testosterone on expression of these molecules during early pregnancy. 30 ovariectomised female Sprague-Dawley rats were divided into 5 groups that consisted of vehicle control, rats received eight days sex-steroid replacement regime (intended to mimic the hormonal changes in early pregnancy) and three groups of rats given testosterone (1 mg/kg/day) subcutaneously with or without flutamide or finasteride between day 6 and 8 representing the period of uterine receptivity. At the end of the treatment, rats were sacrificed and uteri were removed. Expression and distribution of αvβ3 integrin, E-cadherin and mucin-1 were examined by immunoflourescence and levels of messenger RNA (mRNAs) were evaluated by real-time PCR. Expression of αvβ3 integrin, E-cadherin and mucin-1 in the uteri of rats receiving sex-steroid replacement regime increased significantly as compared to control (p<0.05). In these rats, concomitant administration of testosterone between day 6 and 8 resulted in expression of αvβ3 integrin, E-cadherin and mucin-1 to decrease significantly (p<0.05) as compared to rats receiving sex-steroid replacement regime without testosterone treatment. Moreover, the testosterone effects were not antagonized by either flutamide or finasteride. As a result, reduced expression of uterine receptivity molecules by testosterone might interfere with early pregnancy establishment, therefore could adversely affect the female fertility.

Keywords: αvβ3 integrin; E-cadherin; mucin-1; testosterone; uterine receptivity

ABSTRAK

Perkembangan yang mencukupi bagi reseptif rahim adalah penting untuk membolehkan kehamilan berlaku. Pengekspresan molekul reseptif rahim seperti αvβ3 integrin, E-cadherin dan mucin-1 boleh dipengaruhi oleh testosteron. Objektif kajian ini adalah untuk mengkaji kesan testosteron terhadap pengekspresan molekul ini semasa peringkat awal kehamilan. 30 ekor tikus Sprague-Dawley yang telah diovariektomi dibahagikan kepada 5 kumpulan terdiri daripada kumpulan kawalan, kumpulan tikus yang menerima regim penggantian steroid seks selama lapan hari (bertujuan untuk meniru perubahan hormon semasa peringkat awal kehamilan) dan tiga kumpulan tikus yang diberikan rawatan testosteron (1 mg/kg/hari) secara subkulitan dengan atau tanpa kehadiran flutamide atau finasteride antara hari ke-6 hingga ke-8 rawatan yang mewakili tempoh reseptif rahim. Di akhir rawatan, tikus telah dikorbankan dan uteri dikeluarkan. Pengekspresan dan taburan αvβ3 integrin, E-cadherin dan mucin-1 ditentukan dengan menggunakan immunoflourescence dan paras mRNA ditentukan dengan menggunakan Real-time PCR. Pengekspresan αvβ3 integrin, E-cadherin dan mucin-1 dalam uteri tikus yang menerima regim penggantian steroid seks didapati meningkat secara signifikan berbanding kawalan (p<0.05). Pada tikus ini, pemberian bersama testosteron antara hari ke-6 hingga hari ke-8 telah menyebabkan pengekspresan αvβ3 integrin, E-cadherin dan mucin-1 menurun dengan signifikan (p<0.05) berbanding kumpulan yang menerima regim penggantian steroid seks tanpa rawatan testosteron. Selain itu, kesan testosteron ini tidak ditentang oleh flutamide atau finasteride. Kesimpulannya, penurunan pengekspresan molekul reseptif rahim oleh testosteron mungkin mengganggu perkembangan awal kehamilan dan seterusnya boleh menjejaskan kesuburan wanita.

Kata kunci: αvβ3 integrin; E-cadherin; mucin-1; reseptif rahim; testosteron

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*Corresponding authors; email: naguib.salleh@gmail.com

 

 

 

 

 

 

 

 

 

 

 

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