| Title: | Social interactions upregulate hemolymph tryptophan and tyrosine levels in the male lobster cockroach |
| Author(s): | Hsieh HW; Chen SC; Huang WC; Fang S; Yang EC; Hsu CC; Kou R; |
| Address: | "Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 115, Taiwan, ROC. Institute of Statistical Science, Academia Sinica, Taipei 115, Taiwan, ROC. Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan, ROC. Department of Entomology, National Taiwan University, Taipei, Taiwan, ROC. Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 115, Taiwan, ROC. Electronic address: kourong@gate.sinica.edu.tw" |
| DOI: | 10.1016/j.yhbeh.2021.104935 |
| ISSN/ISBN: | 1095-6867 (Electronic) 0018-506X (Linking) |
| Abstract: | "In the present study, we found that tryptophan (TRP) and tyrosine (TYR) levels are increased in hemolymph of male Nauphoeta cinerea after social contact with either male or female conspecifics. Hemolymph was collected from individual males before and after the social interactions, and samples were analyzed by HPLC-ECD; analyte identities were confirmed by UPLC/MS. After a male-male first encounter fight, hemolymph TRP and TYR levels were significantly increased in dominants compared with the levels before the encounter. Conversely, TRP and TYR in subordinates were maintained at levels similar to those before the encounter. While after-fight TRP and TYR levels were significantly higher in dominants than subordinates, no significant differences were found in the contestants before the fight. Moreover, contact with an isolated male antenna was sufficient to stimulate attack behavior and increase hemolymph TRP and TYR titers to levels similar to those seen in dominants. After a male-female interaction, two distinct outcomes could be observed. Either hemolymph TRP and TYR levels were increased in successfully mated males, or TRP and TYR levels were unchanged in males that only exhibited premating wing-raising behavior but failed in mating. After contacting the antenna of a socially naive male with an isolated female antenna, three patterns of behavior and related amino acid response were observed: 1) only premating wing-raising behavior with significant increase of TRP and TYR levels, 2) only attack behavior with significant increase of TRP and TYR levels, and 3) mixed wing-raising and attack behaviors with no significant changes in TRP and TYR levels. The present results show a robust response of hemolymph TRP and TYR to social contact. In light of previously characterized responses in pheromone and juvenile hormone levels, these amine responses suggest that the physiological response of N. cinerea to social contact is multi-dimensional" |
| Keywords: | Animals *Cockroaches Hemolymph/*metabolism Male Social Interaction Tryptophan Tyrosine/*metabolism Aggression Amine-precursors Antenna contact Nauphoeta cinerea Social stimuli Tyrosine; |
| Notes: | "MedlineHsieh, Hsiang-Wen Chen, Shu-Chun Huang, Wan-Chen Fang, Shu Yang, En-Cheng Hsu, Chu-Chun Kou, Rong eng Research Support, Non-U.S. Gov't 2021/01/27 Horm Behav. 2021 Apr; 130:104935. doi: 10.1016/j.yhbeh.2021.104935. Epub 2021 Jan 29" |
