en بیان القایی اینترفرون گامای انسان مقاله کامل Full Length/Original Article <span style="FONT-SIZE: 11pt mso-bidi-font-family: 'Times New Roman'"><strong><font face="times new roman,times,serif" size="2">Background:</font></strong></span><span style="FONT-SIZE: 11pt mso-bidi-font-family: 'Times New Roman'"><font face="times new roman,times,serif" size="2">The premature termination of high producer clones, which will be killed due to cell proliferation and proteins production antagonism, is one of the basic drawback in recombinant proteins technology. Furtheremore, it is supposed some toxic proteins like interferon which we intended to clone and express, inhibit host cells&rsquo; proliferation. So, it is necessary to tightly control IFN-&gamma; production during</font> <font size="2"><font face="times new roman,times,serif">growing and selecting of highly producing clones. <b>Methods:</b> In the present study, we constructed an expression vector, pMPGB43P2(6)K containing the cumate-regulatable expression cassette to high production of human IFN-&gamma; in Chinese Hamster Ovary- Cumate Transactivator (CHO-CTA). The clones were selected in the cumate and without </font><font face="times new roman,times,serif">cumate treated medium. <b>Results:</b> Our results showed, induced IFN-&gamma; expression level was about 5 of magnitude higher than the constitive transgenic system.<b> Conclusion:</b> Application of cumate-regulatable expression cassette, which can be switch off and on by cumate, is useful to production of high producer clones and express toxic proteins in animal cells.</font></font></span> Inducible expression of IFN-g, IFN-g Cloning, Cumate-regulatable expression cassette, Chinese hamster ovary-cumate transactivator (CHO-CTA) 197 202 http://ibj.pasteur.ac.ir/browse.php?a_code=A-10-1-193&slc_lang=en&sid=1 Alireza Zamani علیرضا زمانی zamanialireza@yahoo.com Yes Hamid Pour-Jafari حمید پورجعفری No Seyyed Mehdi Elahi سید مهدی الهی No Nazila Moghadam-Nazem نازیلا مقدم ناظم No Bernard Massie Bernard Massie No