Cellular and Molecular Life Sciences

, Volume 67, Issue 14, pp 2467–2479

Characterization of the 5-HT1A receptor of the honeybee (Apis mellifera) and involvement of serotonin in phototactic behavior

  • Markus Thamm
  • Sabine Balfanz
  • Ricarda Scheiner
  • Arnd Baumann
  • Wolfgang Blenau
Research Article

DOI: 10.1007/s00018-010-0350-6

Cite this article as:
Thamm, M., Balfanz, S., Scheiner, R. et al. Cell. Mol. Life Sci. (2010) 67: 2467. doi:10.1007/s00018-010-0350-6

Abstract

Serotonin plays a key role in modulating various physiological and behavioral processes in both protostomes and deuterostomes. The vast majority of serotonin receptors belong to the superfamily of G-protein-coupled receptors. We report the cloning of a cDNA from the honeybee (Am5-ht1A) sharing high similarity with members of the 5-HT1 receptor class. Activation of Am5-HT1A by serotonin inhibited the production of cAMP in a dose-dependent manner (EC50 = 16.9 nM). Am5-HT1A was highly expressed in brain regions known to be involved in visual information processing. Using in vivo pharmacology, we could demonstrate that Am5-HT1A receptor ligands had a strong impact on the phototactic behavior of individual bees. The data presented here mark the first comprehensive study—from gene to behavior—of a 5-HT1A receptor in the honeybee, paving the way for the eventual elucidation of additional roles of this receptor subtype in the physiology and behavior of this social insect.

Keywords

5-HT Biogenic amine Cyclic AMP GPCR Phototaxis Signal transduction 

Abbreviations

5-CT

5-Carboxamidotryptamine

5-HT

5-Hydroxytryptamine

5-MT

5-Methoxytryptamine

AD

Antibody diluent

Am5-HT1A

Apis mellifera 5-HT1A receptor

Am5-ht1A

Gene or cDNA encoding Apis mellifera 5-HT1A receptor

[cAMP]i

Intracellular cAMP level

CNS

Central nervous system

CPL3

Third cytoplasmic loop

HA

Hemagglutinin A

HEK 293

Human embryonic kidney cells

PBS

Phosphate-buffered saline

TBS-T

Tris-buffered saline containing Tween 20

TM

Transmembrane domain

Copyright information

© Springer Basel AG 2010

Authors and Affiliations

  • Markus Thamm
    • 1
  • Sabine Balfanz
    • 2
  • Ricarda Scheiner
    • 1
  • Arnd Baumann
    • 2
  • Wolfgang Blenau
    • 1
  1. 1.Institute of Biochemistry and Biology, Animal PhysiologyUniversity of PotsdamPotsdamGermany
  2. 2.Institute of Structural Biology and Biophysics 1Forschungszentrum JülichJülichGermany

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