Identification and expression analyses of a novel serotonin receptor gene, 5-HT_2β, in the field cricket, Gryllus bimaculatus

Watanabe, T. and Aonuma, H. (2012) Identification and expression analyses of a novel serotonin receptor gene, 5-HT_2β, in the field cricket, Gryllus bimaculatus. Acta Biologica Hungarica, 63 (Supple). pp. 58-62. ISSN 0236-5383

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Abstract

Biogenic amine serotonin (5-HT) modulates various aspects of behaviors such as aggressive behavior and circadian behavior in the cricket. In our previous report, in order to elucidate the molecular basis of the cricket 5-HT system, we identified three genes involved in 5-HT biosynthesis, as well as four 5-HT receptor genes (5-HT_1A, 5-HT_1B, 5-HT_2α, and 5-HT₇) expressed in the brain of the field cricket Gryllus bimaculatus DeGeer [7]. In the present study, we identified Gryllus 5-HT_2β gene, an additional 5-HT receptor gene expressed in the cricket brain, and examined its tissue-specific distribution and embryonic stagedependent expression. Gryllus 5-HT_2β gene was ubiquitously expressed in the all examined adult tissues, and was expressed during early embryonic development, as well as during later stages. This study suggests functional differences between two 5-HT₂ receptors in the cricket.

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