Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory Mice

The scientific community has placed increasing importance on sustainability, leading to the exploration of alternative bedding materials to the widely used aspen wood chips. Bedding plays a critical role in ensuring the wellbeing of animals and the validity of experimental outcomes. Compared to the...

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Main Authors: Dana Matzek, Bastian Popper
Format: Article
Language:English
Published: MDPI AG 2025-02-01
Series:Animals
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Online Access:https://www.mdpi.com/2076-2615/15/4/501
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author Dana Matzek
Bastian Popper
author_facet Dana Matzek
Bastian Popper
author_sort Dana Matzek
collection DOAJ
description The scientific community has placed increasing importance on sustainability, leading to the exploration of alternative bedding materials to the widely used aspen wood chips. Bedding plays a critical role in ensuring the wellbeing of animals and the validity of experimental outcomes. Compared to the frequently evaluated biological materials, such as corncobs or spelts, synthetic materials such as plastic granules have been less investigated. We characterized two thermostable plastic materials as an alternative bedding material in C57BL/6J and BALB/c mice. We examined the impact of those bedding alternatives on physiological parameters, behavior, health status, and cage climate in static and digitally ventilated cages as well as the possibility of a reuse cycle after reprocessing. The mouse lines showed different locomotor activity, feeding, and nestbuilding behavior on plastic granules. While ammonia levels were constantly higher in static cages than in ventilated cages, blood parameters were unaltered, and health status was maintained during the reuse procedure. We show the use of plastic granulate as bedding material for mice that has the potential for processing and recycling. Further, we show that the material is accepted differently by the lines in the preference choice test without affecting their health or hygiene status.
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spelling doaj-art-ffd3862adbd347079dcabd39aea868fa2025-08-20T03:11:18ZengMDPI AGAnimals2076-26152025-02-0115450110.3390/ani15040501Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory MiceDana Matzek0Bastian Popper1Biomedical Center, Core Facility Animal Models, Faculty of Medicine, Ludwig-Maximilians-Universität München, Großhaderner Straße 9, 82152 Planegg-Martinsried, GermanyBiomedical Center, Core Facility Animal Models, Faculty of Medicine, Ludwig-Maximilians-Universität München, Großhaderner Straße 9, 82152 Planegg-Martinsried, GermanyThe scientific community has placed increasing importance on sustainability, leading to the exploration of alternative bedding materials to the widely used aspen wood chips. Bedding plays a critical role in ensuring the wellbeing of animals and the validity of experimental outcomes. Compared to the frequently evaluated biological materials, such as corncobs or spelts, synthetic materials such as plastic granules have been less investigated. We characterized two thermostable plastic materials as an alternative bedding material in C57BL/6J and BALB/c mice. We examined the impact of those bedding alternatives on physiological parameters, behavior, health status, and cage climate in static and digitally ventilated cages as well as the possibility of a reuse cycle after reprocessing. The mouse lines showed different locomotor activity, feeding, and nestbuilding behavior on plastic granules. While ammonia levels were constantly higher in static cages than in ventilated cages, blood parameters were unaltered, and health status was maintained during the reuse procedure. We show the use of plastic granulate as bedding material for mice that has the potential for processing and recycling. Further, we show that the material is accepted differently by the lines in the preference choice test without affecting their health or hygiene status.https://www.mdpi.com/2076-2615/15/4/501polycarbonatepolysulfonsynthetic beddingmus musculus
spellingShingle Dana Matzek
Bastian Popper
Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory Mice
Animals
polycarbonate
polysulfon
synthetic bedding
mus musculus
title Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory Mice
title_full Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory Mice
title_fullStr Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory Mice
title_full_unstemmed Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory Mice
title_short Characterization of Reusable and Recyclable Plastic Bedding Materials for Laboratory Mice
title_sort characterization of reusable and recyclable plastic bedding materials for laboratory mice
topic polycarbonate
polysulfon
synthetic bedding
mus musculus
url https://www.mdpi.com/2076-2615/15/4/501
work_keys_str_mv AT danamatzek characterizationofreusableandrecyclableplasticbeddingmaterialsforlaboratorymice
AT bastianpopper characterizationofreusableandrecyclableplasticbeddingmaterialsforlaboratorymice