Cloning and Expression of Cockroach α7 Nicotinic Acetylcholine Receptor Subunit

Frontiers in Physiology

Jérôme Graton¹  Jean-Yves Le Questel¹  Alison Cartereau²  Carine Martin²  Steeve H. Thany²  Emiliane Taillebois²  Balaji Selvam³ 

[1] CEISAM-UMR CNRS 6230, Faculté des Sciences et des Techniques, Université de Nantes, Nantes, France;LBLGC, UPRES EA 1207-USC INRA 1328, Université d’Orléans, Orléans, France;Roger Adams Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, United States;

关键词: nicotinic receptor;    insect;    α7 subunit;    acetylcholine;    nicotine;    neonicotinoid;   

DOI  :  10.3389/fphys.2020.00418

来源: DOAJ

【 摘 要 】

Understanding insect nicotinic acetylcholine receptor (nAChR) subtypes is of major interest because they are the main target of several insecticides. In this study, we have cloned a cockroach Pameα7 subunit that encodes a 518 amino acid protein with futures typical of nAChR subunit, and sequence homology to α7 subunit. Pameα7 is differently expressed in the cockroach nervous system, in particular in the antennal lobes, optical lobes and the mushroom bodies where specific expression was found in the non-compact Kenyon cells. In addition, we found that cockroach Pameα7 subunits expressed in Xenopus laevis oocytes can assemble to form homomeric receptors. Electrophysiological recordings using the two-electrode voltage clamp method demonstrated that nicotine induced an Imax current of −92 ± 27 nA at 1 mM. Despite that currents are low with the endogenous ligand, ACh, this study provides information on the first expression of cockroach α7 homomeric receptor.

【 授权许可】

Unknown