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New Discovery: Peroxisomes Boost Brown Fat Metabolism

9/19/2025

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Summary

Story summary

Researchers at Washington University School of Medicine identified a new mechanism in brown fat that improves metabolic health, focusing on peroxisomes as heat producers.
Published in *Nature* on September 17, 2025, the study highlights the role of peroxisomes and the enzyme acyl-CoA oxidase 2 (ACOX2) in thermogenesis.
Mice without ACOX2 exhibited reduced cold tolerance and higher obesity risk, while those with increased ACOX2 levels showed better metabolic health.
The findings indicate potential dietary or probiotic strategies to enhance ACOX2 activity for weight management.
This research challenges the belief that mitochondrial UCP1 is the only heat production driver in brown fat.

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Story summary

Researchers at Washington University School of Medicine identified a new mechanism in brown fat that improves metabolic health, focusing on peroxisomes as heat producers.
Published in *Nature* on September 17, 2025, the study highlights the role of peroxisomes and the enzyme acyl-CoA oxidase 2 (ACOX2) in thermogenesis.
Mice without ACOX2 exhibited reduced cold tolerance and higher obesity risk, while those with increased ACOX2 levels showed better metabolic health.
The findings indicate potential dietary or probiotic strategies to enhance ACOX2 activity for weight management.
This research challenges the belief that mitochondrial UCP1 is the only heat production driver in brown fat.