Parallel synthesis and pharmacological screening of nonpeptide ligands of the neuropeptide Y receptor subtype Y5

Henlin, Jean‐Michel; Duchêne-Roger, F.; Desmet-Beaufort, C.; Levens, Nigel; Fauchère, Jean‐Luc; Boutin, Jean A.; Nicolas, Jean-Paul

doi:10.1034/j.1399-3011.2001.00766.x

Cited by 2 publications

(1 citation statement)

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“…Among several possible explanations, we hypothesized that the IRES may influence the mRNA stability, or that IRES activity may differ in stable versus transient transfections. Using the present system, we also showed the functionality of the NYP5 receptor, since the pharmacological data gathered with this system compare well with those reported on the other stable system available in the literature [15] or with our own data obtained, painfully, with the transiently expressed cells [4,27,30,31].…”

Section: Discussionsupporting

confidence: 85%

The use of IRES-based bicistronic vectors allows the stable expression of recombinant G-protein coupled receptors such as NPY5 and histamine 4

et al. 2006

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Stable expression of G protein coupled receptors in cell lines is a crucial tool for the characterization of the molecular pharmacology of receptors and the screening for new antagonists. However, in some instances, many difficulties have been encountered to obtain stable cell lines expressing functional receptors. Here, we addressed the question of vector optimization to establish cell lines expressing the human neuropeptide Y receptor 5 (NPY5-R) or histamine receptor 4 (HH4R). We have compared bicistronic vectors containing viral or cellular internal ribosome entry sites (IRES), co-expressing the receptor and the neomycine resistance gene from a single mRNA, to a bigenic vector containing two distinct promoters upstream each different genes. This study is the first one to validate the use of three cellular IRESs for long-term transgene expression. Our results demonstrate for both NPY5-R and HH4R that the bicistronic vectors with EMCV, VEGF, FGF1A or FGF2 IRES provide clones expressing functional receptors with yields between 25% and 100%. In contrast, the bigenic vector provided no functional clones, related to a low expression of NPY5R mRNA. The cell lines expressing active receptor were stable after more than 50 passages. These data indicate that IRES-based bicistronic vectors are particularly appropriate to establish cell clones expressing active G-coupled protein receptors with a high yield. In the case of NPY5, it was a new way to produce such a stable cell line. Furthermore, the characteristics-presented herein-of this receptor pharmacological property are perfectly in line with those reported in the literature.

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