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Low-gainer diet-induced obese microbiota transplanted mice exhibit increased fighting.

ABSTRACT: Weight gain variation is a great challenge in diet-induced obesity studies since low-gainer animals are of limited experimental value. The inbred C57BL/6 (B6) mice are frequently used models due to their genetic homogeneity and susceptibility to diet-induced obesity (DIO). The aim of this study is to investigate if the gut microbiota (GM) influences the fraction of low weight gainers in DIO studies. A total of 100 male B6 mice (donor population) were fed a high-fat diet for 14 weeks and divided into the study groups high gainer (HG) and low gainer (LG) based on their weight gain. Subsequently, fecal matter transplantation (FMT) was done on germ-free B6 mice with GM from HG and LG donors (FMT population). LG (13.35 ± 2.5 g) and HG (25.52 ± 2.0 g) animals were identified by the weight gain from week 1 to week 12. Interestingly, the start weight of the LG (20.36 ± 1.4 g) and HG (21.59 ± 0.7 g) groups differed significantly. Transplanting LG or HG fecal matter to germ-free mice resulted in significant differences in weight gain between HG and LG, as well as differences in serum leptin levels and epididymal fat pad weight. A clear LG-specific GM composition could not be distinguished by 16S rRNA gene amplicon sequencing. Surprisingly, significantly more fighting was recorded in LG groups of both donor populations and when transplanted to germ-free mice. The HG and LG phenotypes could be transferred to germ-free mice. The increased fighting in the LG group in both studies suggests not only that the tendency to fight can be transferred by FMT in these mice, but also that fighting should be prevented in DIO studies to minimize the number of LG animals.

SUBMITTER: Junker Mentzel CM

PROVIDER: S-EPMC11362840 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature

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Low-gainer diet-induced obese microbiota transplanted mice exhibit increased fighting.

Junker Mentzel Caroline M CM Hui Yan Y Hammerich Tanja Maria Stentoft TMS Klug-Dambmann Malene M Liu Yi Y Zachariassen Line Fisker LF Hansen Lars Hestbjerg LH Aslampaloglou Antonios A Kiersgaard Maria M Nielsen Dennis Sandris DS Hansen Axel Kornerup AK Krych Lukasz L

Clinical and translational science 20240901 9

Weight gain variation is a great challenge in diet-induced obesity studies since low-gainer animals are of limited experimental value. The inbred C57BL/6 (B6) mice are frequently used models due to their genetic homogeneity and susceptibility to diet-induced obesity (DIO). The aim of this study is to investigate if the gut microbiota (GM) influences the fraction of low weight gainers in DIO studies. A total of 100 male B6 mice (donor population) were fed a high-fat diet for 14 weeks and divided ...[more]

PMID: 39212186

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Dataset Information

Low-gainer diet-induced obese microbiota transplanted mice exhibit increased fighting.

Publications

Low-gainer diet-induced obese microbiota transplanted mice exhibit increased fighting.

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