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Křemenová J, Balvín O, Otti O, Pavonič M, Reinhardt K, Šimek Z, Bartonička T. Identification and age-dependence of pteridines in bed bugs (Cimex lectularius) and bat bugs (C. pipistrelli) using liquid chromatography-tandem mass spectrometry. Sci Rep 2020; 10:10146. [PMID: 32576867 PMCID: PMC7311437 DOI: 10.1038/s41598-020-66919-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 05/29/2020] [Indexed: 11/23/2022] Open
Abstract
Determining the age of free-living insects, particularly of blood-sucking species, is important for human health because such knowledge critically influences the estimates of biting frequency and vectoring ability. Genetic age determination is currently not available. Pteridines gradually accumulate in the eyes of insects and their concentrations is the prevailing method. Despite of their stability, published extractions differ considerably, including for standards, for mixtures of pteridines and even for light conditions. This methodological inconsistency among studies is likely to influence age estimates severely and to hamper their comparability. Therefore we reviewed methodological steps across 106 studies to identify methodological denominators and results across studies. Second, we experimentally test how different pteridines vary in their age calibration curves in, common bed (Cimex lectularius) and bat bugs (C. pipistrelli). Here we show that the accumulation of particular pteridines varied between a) different populations and b) rearing temperatures but not c) with the impact of light conditions during extraction or d) the type of blood consumed by the bugs. To optimize the extraction of pteridines and measuring concentrations, we recommend the simultaneous measurement of more than one standard and subsequently to select those that show consistent changes over time to differentiate among age cohorts.
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Affiliation(s)
- Jana Křemenová
- Masaryk University, Faculty of Sciences, Department of Botany and Zoology, Brno, 61137, Czech Republic.
| | - Ondřej Balvín
- Czech University of Life Sciences Prague, Faculty of Environmental Science, Department of Ecology, Prague, 16521, Czech Republic
| | - Oliver Otti
- Universität Bayreuth, Animal Ecology I, Animal Population Ecology, Bayreuth, 95440, Germany
| | - Michal Pavonič
- Masaryk University, Faculty of Sciences, Department of Botany and Zoology, Brno, 61137, Czech Republic
| | - Klaus Reinhardt
- Technische Universität Dresden, Department of Biology, Applied Zoology, Dresden, 01069, Germany
| | - Zdeněk Šimek
- Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, 62500, Czech Republic
| | - Tomáš Bartonička
- Masaryk University, Faculty of Sciences, Department of Botany and Zoology, Brno, 61137, Czech Republic
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