Real-time telemetry monitoring of oxygen in the central complex of freely-walking Gromphadorhina portentosa

Autoři: Pier Andrea Serra aff001;  Paola Arrigo aff001;  Andrea Bacciu aff001;  Daniele Zuncheddu aff001;  Riccardo Deliperi aff001;  Diego Antón Viana aff001;  Patrizia Monti aff001;  Maria Vittoria Varoni aff004;  Maria Alessandra Sotgiu aff005;  Pasquale Bandiera aff005;  Gaia Rocchitta aff001
Působiště autorů: Department of Medical, Surgical and Experimental Medicine, Medical School, University of Sassari, Sassari, Italy aff001;  Institute of Sciences of Food Production, Italian National Research Council, Sassari, Italy aff002;  Mediterranean Center for Disease Control, University of Sassari, Sassari, Italy aff003;  Department of Veterinary Medicine, Medical School, University of Sassari, Sassari, Italy aff004;  Department of Biomedical Sciences, Medical School, University of Sassari, Sassari, Italy aff005
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224932


A new telemetric system for the electrochemical monitoring of dissolved oxygen is showed. The device, connected with two amperometric sensors, has been successfully applied to the wireless detection of the extracellular oxygen in the central complex of freely-walking Gromphadorhina portentosa. The unit was composed of a potentiostat, a two-channel sensor conditioning circuit, a microprocessor module, and a wireless serial transceiver. The amperometric signals were digitalized and sent to a notebook using a 2.4 GHz transceiver while a serial-to-USB converter was connected to a second transceiver for completing the communication bridge. The software, running on the laptop, allowed to save and graph the oxygen signals. The electronics showed excellent stability and the acquired data was linear in a range comprised between 0 and -165 nA, covering the entire range of oxygen concentrations. A series of experiments were performed to explore the dynamics of dissolved oxygen by exposing the animals to different gases (nitrogen, oxygen and carbon dioxide), to low temperature and anesthetic agents (chloroform and triethylamine). The resulting data are in agreement with previous O2 changes recorded in the brain of awake rats and mice. The proposed system, based on simple and inexpensive components, can constitute a new experimental model for the exploration of central complex neurochemistry and it can also work with oxidizing sensors and amperometric biosensors.

Klíčová slova:

Anesthetics – Carbon dioxide – Glucose metabolism – Insects – Oxygen – Oxygen metabolism – Cockroaches – Chloroform


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2019 Číslo 11