Christine Mund, Anupam Sinha, Anika Aderhold, Ivona Mateska, Eman Hagag, Sofia Traikov, Bettina Gercken, Andres Soto, Jonathan Pollock, Lilli Arndt, Michele Wölk, Natalie Werner, Georgia Fodelianaki, Pallavi Subramanian, Kyoung-Jin Chung, Sylvia Grossklaus, Mathias Langner, Mohamed Elgendy, Tatyana Grinenko, Ben Wielockx, Andreas Dahl, Martin Gericke, Matthias Blüher, Ünal Coskun, David Voehringer, Maria Fedorova, Mirko Peitzsch, Peter J Murray, Triantafyllos Chavakis, Vasileia Ismini Alexaki
{"title":"A key role of polyamine metabolism in adipose tissue homeostasis that regulates obesity.","authors":"Christine Mund, Anupam Sinha, Anika Aderhold, Ivona Mateska, Eman Hagag, Sofia Traikov, Bettina Gercken, Andres Soto, Jonathan Pollock, Lilli Arndt, Michele Wölk, Natalie Werner, Georgia Fodelianaki, Pallavi Subramanian, Kyoung-Jin Chung, Sylvia Grossklaus, Mathias Langner, Mohamed Elgendy, Tatyana Grinenko, Ben Wielockx, Andreas Dahl, Martin Gericke, Matthias Blüher, Ünal Coskun, David Voehringer, Maria Fedorova, Mirko Peitzsch, Peter J Murray, Triantafyllos Chavakis, Vasileia Ismini Alexaki","doi":"10.1016/j.metabol.2025.156358","DOIUrl":null,"url":null,"abstract":"<p><strong>Background and aims: </strong>Adipose tissue function is integral to systemic metabolic homeostasis. Excessive adipose tissue growth is associated with development of chronic low-grade inflammation and whole body dysmetabolism. The cell metabolic pathways regulating adipose tissue growth and homeostasis are little understood. Here we studied the role of polyamine metabolism in adipose tissue (patho)physiology.</p><p><strong>Methods: </strong>We generated mice with global and adipocyte progenitor (AP)-specific Antizyme inhibitor 2 (AZIN2) deficiency and performed diet-induced obesity studies. APs were isolated from the subcutaneous and gonadal adipose tissue of mice and cultured.</p><p><strong>Results: </strong>Polyamine metabolism components, including AZIN2, were highly expressed in APs and their expression in the adipose tissue was downregulated with obesity. IL4 induced Azin2 expression in APs. AZIN2 facilitated polyamine synthesis and acetylation, and regulated total acetyl-CoA levels in APs. AZIN2 deficiency upregulated histone acetylation in genes related to lipid metabolism. Azin2<sup>-/-</sup> APs committed more efficiently to adipogenesis in vivo and in vitro, and were more prone to senescence compared to wild-type counterparts. Upon diet-induced obesity, global and AP-specific AZIN2 deficiency in mice provoked AP depletion, adipocyte hypertrophy, obesity, inflammation, glucose intolerance and insulin resistance. In human adipose tissue, AZIN2 expression strongly correlated with expression of progenitor markers.</p><p><strong>Conclusions: </strong>Altogether, we identified AZIN2 as a novel AP marker that regulates AP fate and preserves adipose tissue health.</p>","PeriodicalId":18694,"journal":{"name":"Metabolism: clinical and experimental","volume":" ","pages":"156358"},"PeriodicalIF":11.9000,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metabolism: clinical and experimental","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1016/j.metabol.2025.156358","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/5 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENDOCRINOLOGY & METABOLISM","Score":null,"Total":0}
引用次数: 0
Abstract
Background and aims: Adipose tissue function is integral to systemic metabolic homeostasis. Excessive adipose tissue growth is associated with development of chronic low-grade inflammation and whole body dysmetabolism. The cell metabolic pathways regulating adipose tissue growth and homeostasis are little understood. Here we studied the role of polyamine metabolism in adipose tissue (patho)physiology.
Methods: We generated mice with global and adipocyte progenitor (AP)-specific Antizyme inhibitor 2 (AZIN2) deficiency and performed diet-induced obesity studies. APs were isolated from the subcutaneous and gonadal adipose tissue of mice and cultured.
Results: Polyamine metabolism components, including AZIN2, were highly expressed in APs and their expression in the adipose tissue was downregulated with obesity. IL4 induced Azin2 expression in APs. AZIN2 facilitated polyamine synthesis and acetylation, and regulated total acetyl-CoA levels in APs. AZIN2 deficiency upregulated histone acetylation in genes related to lipid metabolism. Azin2-/- APs committed more efficiently to adipogenesis in vivo and in vitro, and were more prone to senescence compared to wild-type counterparts. Upon diet-induced obesity, global and AP-specific AZIN2 deficiency in mice provoked AP depletion, adipocyte hypertrophy, obesity, inflammation, glucose intolerance and insulin resistance. In human adipose tissue, AZIN2 expression strongly correlated with expression of progenitor markers.
Conclusions: Altogether, we identified AZIN2 as a novel AP marker that regulates AP fate and preserves adipose tissue health.
期刊介绍：
Metabolism upholds research excellence by disseminating high-quality original research, reviews, editorials, and commentaries covering all facets of human metabolism.
Consideration for publication in Metabolism extends to studies in humans, animal, and cellular models, with a particular emphasis on work demonstrating strong translational potential.
The journal addresses a range of topics, including:
- Energy Expenditure and Obesity
- Metabolic Syndrome, Prediabetes, and Diabetes
- Nutrition, Exercise, and the Environment
- Genetics and Genomics, Proteomics, and Metabolomics
- Carbohydrate, Lipid, and Protein Metabolism
- Endocrinology and Hypertension
- Mineral and Bone Metabolism
- Cardiovascular Diseases and Malignancies
- Inflammation in metabolism and immunometabolism
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