What gene signatures in fat tissue are linked to cardiometabolic disease in mice?
Research in mice models of diet-induced cardiometabolic disease reveals that intermuscular adipose tissue (IMAT) undergoes significant remodeling. This tissue expansion occurs within specific areas around muscle fibers and involves the coordinated activation of several biological pathways. These changes include shifts in inflammation, extracellular matrix structure, and metabolic function.
What the research says
A study using spatial transcriptomics in mice found that intermuscular fat expansion happens in discrete niches surrounding muscle fibers 4. In these areas, researchers observed the simultaneous activation of pathways related to fat formation, extracellular matrix, inflammation, and metabolism 4. The abundance of fibro-adipogenic progenitor cells did not predict fat cell formation, suggesting that lineage changes depend on the local context rather than just cell counts 4.
Healthy human fat tissue is associated with high expression of extracellular matrix components like collagens, which suggests a dynamic ability to remodel tissue is a sign of health 5. In contrast, unhealthy obese tissue showed lower expression of these components but higher levels of proteins that cross-link the matrix 5. While this source focuses on humans, it provides context for the structural changes seen in mouse models where matrix remodeling is a key feature of disease 45.
Other research indicates that maternal high-fat diets can alter histone modifications on genes linked to cholesterol biosynthesis and cardiac disease in offspring rats 6. These epigenetic changes affect genes associated with metabolic processes and blood pressure regulation 6. Additionally, transcriptomic analysis of insulin-resistant adipose tissue has identified specific target genes involved in inflammatory and oxidative stress pathways 7.
What to ask your doctor
- How does my body fat distribution compare to patterns seen in research on cardiometabolic risk?
This question is drawn from common patient questions about Diabetes & Endocrinology and answered using cited medical research. We do not provide individualized advice.