کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10770437 | 1050833 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Constitutive activity of endogenous receptors by inducible Gq overexpression
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
We have developed an inducible cell line that transiently expresses Gqα G protein subunits in response to doxycycline. HEK293/Tet-On pBI(Gqα) cells worked consistently, achieving high and tightly regulated levels of Gqα overexpression (38-fold increase compared with non-induced cells). We investigated the possibility of using an inducible system to increase the proportion of constitutively active endogenously expressed G protein-coupled receptors (GPCRs) by overexpressing Gqα. Not only did we observe an increase in basal activity following doxycycline treatment, but also increased intrinsic activity of agonists such as carbachol, endothelin, lysophosphatidic acid (LPA), and bradykinin. Furthermore, carbachol and LPA potency increased following Gqα overexpression, as did the intrinsic activity of the partial agonist pilocarpine, observations indicative of constitutive activity. An inducible cell line, transiently expressing G proteins, can therefore be employed to induce constitutive activity of endogenously expressed GPCRs. This model system could be used to identify clinically important inverse agonists.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 331, Issue 4, 17 June 2005, Pages 1239-1244
Journal: Biochemical and Biophysical Research Communications - Volume 331, Issue 4, 17 June 2005, Pages 1239-1244
نویسندگان
Jason L. Scragg, Stephen G. Ball, Anthony J. Balmforth,