Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine.
Fish are an important model for the pharmacological and toxicological characterization of human pharmaceuticals in drug discovery, drug safety assessment and environmental toxicology. However, do fish respond to pharmaceuticals as humans do? To address this question, we provide a novel quantitative...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4206295?pdf=render |
| _version_ | 1811259282130206720 |
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| author | Luigi Margiotta-Casaluci Stewart F Owen Rob I Cumming Anna de Polo Matthew J Winter Grace H Panter Mariann Rand-Weaver John P Sumpter |
| author_facet | Luigi Margiotta-Casaluci Stewart F Owen Rob I Cumming Anna de Polo Matthew J Winter Grace H Panter Mariann Rand-Weaver John P Sumpter |
| author_sort | Luigi Margiotta-Casaluci |
| collection | DOAJ |
| description | Fish are an important model for the pharmacological and toxicological characterization of human pharmaceuticals in drug discovery, drug safety assessment and environmental toxicology. However, do fish respond to pharmaceuticals as humans do? To address this question, we provide a novel quantitative cross-species extrapolation approach (qCSE) based on the hypothesis that similar plasma concentrations of pharmaceuticals cause comparable target-mediated effects in both humans and fish at similar level of biological organization (Read-Across Hypothesis). To validate this hypothesis, the behavioural effects of the anti-depressant drug fluoxetine on the fish model fathead minnow (Pimephales promelas) were used as test case. Fish were exposed for 28 days to a range of measured water concentrations of fluoxetine (0.1, 1.0, 8.0, 16, 32, 64 µg/L) to produce plasma concentrations below, equal and above the range of Human Therapeutic Plasma Concentrations (H(T)PCs). Fluoxetine and its metabolite, norfluoxetine, were quantified in the plasma of individual fish and linked to behavioural anxiety-related endpoints. The minimum drug plasma concentrations that elicited anxiolytic responses in fish were above the upper value of the H(T)PC range, whereas no effects were observed at plasma concentrations below the H(T)PCs. In vivo metabolism of fluoxetine in humans and fish was similar, and displayed bi-phasic concentration-dependent kinetics driven by the auto-inhibitory dynamics and saturation of the enzymes that convert fluoxetine into norfluoxetine. The sensitivity of fish to fluoxetine was not so dissimilar from that of patients affected by general anxiety disorders. These results represent the first direct evidence of measured internal dose response effect of a pharmaceutical in fish, hence validating the Read-Across hypothesis applied to fluoxetine. Overall, this study demonstrates that the qCSE approach, anchored to internal drug concentrations, is a powerful tool to guide the assessment of the sensitivity of fish to pharmaceuticals, and strengthens the translational power of the cross-species extrapolation. |
| first_indexed | 2024-04-12T18:28:51Z |
| format | Article |
| id | doaj.art-16ae92bc13f44f1790197ce3fc353461 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-12T18:28:51Z |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-16ae92bc13f44f1790197ce3fc3534612022-12-22T03:21:09ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-01910e11046710.1371/journal.pone.0110467Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine.Luigi Margiotta-CasaluciStewart F OwenRob I CummingAnna de PoloMatthew J WinterGrace H PanterMariann Rand-WeaverJohn P SumpterFish are an important model for the pharmacological and toxicological characterization of human pharmaceuticals in drug discovery, drug safety assessment and environmental toxicology. However, do fish respond to pharmaceuticals as humans do? To address this question, we provide a novel quantitative cross-species extrapolation approach (qCSE) based on the hypothesis that similar plasma concentrations of pharmaceuticals cause comparable target-mediated effects in both humans and fish at similar level of biological organization (Read-Across Hypothesis). To validate this hypothesis, the behavioural effects of the anti-depressant drug fluoxetine on the fish model fathead minnow (Pimephales promelas) were used as test case. Fish were exposed for 28 days to a range of measured water concentrations of fluoxetine (0.1, 1.0, 8.0, 16, 32, 64 µg/L) to produce plasma concentrations below, equal and above the range of Human Therapeutic Plasma Concentrations (H(T)PCs). Fluoxetine and its metabolite, norfluoxetine, were quantified in the plasma of individual fish and linked to behavioural anxiety-related endpoints. The minimum drug plasma concentrations that elicited anxiolytic responses in fish were above the upper value of the H(T)PC range, whereas no effects were observed at plasma concentrations below the H(T)PCs. In vivo metabolism of fluoxetine in humans and fish was similar, and displayed bi-phasic concentration-dependent kinetics driven by the auto-inhibitory dynamics and saturation of the enzymes that convert fluoxetine into norfluoxetine. The sensitivity of fish to fluoxetine was not so dissimilar from that of patients affected by general anxiety disorders. These results represent the first direct evidence of measured internal dose response effect of a pharmaceutical in fish, hence validating the Read-Across hypothesis applied to fluoxetine. Overall, this study demonstrates that the qCSE approach, anchored to internal drug concentrations, is a powerful tool to guide the assessment of the sensitivity of fish to pharmaceuticals, and strengthens the translational power of the cross-species extrapolation.http://europepmc.org/articles/PMC4206295?pdf=render |
| spellingShingle | Luigi Margiotta-Casaluci Stewart F Owen Rob I Cumming Anna de Polo Matthew J Winter Grace H Panter Mariann Rand-Weaver John P Sumpter Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine. PLoS ONE |
| title | Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine. |
| title_full | Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine. |
| title_fullStr | Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine. |
| title_full_unstemmed | Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine. |
| title_short | Quantitative cross-species extrapolation between humans and fish: the case of the anti-depressant fluoxetine. |
| title_sort | quantitative cross species extrapolation between humans and fish the case of the anti depressant fluoxetine |
| url | http://europepmc.org/articles/PMC4206295?pdf=render |
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