What question did this study set out to answer?

To evaluate the aquatic hydrolytic degradation of the antimicrobial peptide Pep16 in standardized buffered water versus natural river water to assess the reliability of regulatory persistence tests.

September 17, 2026Environmental Toxicology and Chemistry

Matrix-driven hydrolysis of an antimicrobial peptide reveals limitations of standardized aquatic degradation tests

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Authors

ODOwen Daniel TTThomas Thiebault FAFabrice Alliot

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Overview

Experimental study reveals degradation of an antimicrobial peptide in river water despite buffer stability, highlighting standard test limitations.

Key Points

To evaluate the aquatic hydrolytic degradation of the antimicrobial peptide Pep16 in standardized buffered water versus natural river water to assess the reliability of regulatory persistence tests.
Assessed Pep16 hydrolysis in buffered ultrapure water according to OECD guideline No. 111 across standard regulatory testing conditions.
Incubated Pep16 in sterilized and unsterilized surface water collected from the Seine River, testing the influence of environmental factors and specific ions including Cu2+, Fe2+, nitrate, nitrite, and sulfate.
Identified degradation pathways and transformation products using high-resolution mass spectrometry.
Pep16 showed no measurable degradation under all standard buffered conditions and met the OECD criteria for classification as non-hydrolysable.
Pep16 degraded readily in sterilized river water, with observed half-lives ranging from 346 to 2,665 hours depending on sampling period and sterilization technique.
Degradation was driven abiotically by natural organic matter and accelerated by Cu2+, as well as biotically by extracellular enzymes, producing transformation products consistent with peptide backbone cleavage.

Cite This Study

Daniel et al. (2026) studied this question.

synapsesocial.com/papers/6aabb73d5f706d05830e62fa https://doi.org/10.1093/etojnl/vgag250

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September 17, 2026Environmental Toxicology and Chemistry

Matrix-driven hydrolysis of an antimicrobial peptide reveals limitations of standardized aquatic degradation tests

View Full Paper

Ask AI

Bookmark

Authors

ODOwen Daniel TTThomas Thiebault FAFabrice Alliot

Discussion

Member takes

Overview

Experimental study reveals degradation of an antimicrobial peptide in river water despite buffer stability, highlighting standard test limitations.

Key Points

To evaluate the aquatic hydrolytic degradation of the antimicrobial peptide Pep16 in standardized buffered water versus natural river water to assess the reliability of regulatory persistence tests.
Assessed Pep16 hydrolysis in buffered ultrapure water according to OECD guideline No. 111 across standard regulatory testing conditions.
Incubated Pep16 in sterilized and unsterilized surface water collected from the Seine River, testing the influence of environmental factors and specific ions including Cu2+, Fe2+, nitrate, nitrite, and sulfate.
Identified degradation pathways and transformation products using high-resolution mass spectrometry.
Pep16 showed no measurable degradation under all standard buffered conditions and met the OECD criteria for classification as non-hydrolysable.
Pep16 degraded readily in sterilized river water, with observed half-lives ranging from 346 to 2,665 hours depending on sampling period and sterilization technique.
Degradation was driven abiotically by natural organic matter and accelerated by Cu2+, as well as biotically by extracellular enzymes, producing transformation products consistent with peptide backbone cleavage.

Cite This Study

Daniel et al. (2026) studied this question.

synapsesocial.com/papers/6aabb73d5f706d05830e62fa https://doi.org/10.1093/etojnl/vgag250

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