Ercc1-flox Mouse

Ercc1, or Excision repair cross-complementation group 1, is a key gene encoding a subunit of the ERCC1-XPF nuclease. This enzyme is crucial for DNA repair, especially in the nucleotide excision repair (NER) pathway, which repairs bulky DNA adducts like intrastrand and interstrand crosslinks. ERCC1-XPF also participates in double-strand break repair, interstrand crosslink repair, base excision repair as a backup, and telomere length regulation [1,3].

In mouse models, Ercc1 deficiency (Ercc1Δ/-) leads to rapid manifestation of vascular aging characteristics. The aortas of these mice show arterial thickening, loss of cells, discontinuous endothelial layer, phenotypical switching of vascular smooth muscle cells (VSMCs), increased matrix metalloproteinase (MMP) activity, elastin fragmentation, and proteoglycan deposition. This indicates that Ercc1 plays a vital role in maintaining vascular homeostasis [2].

In conclusion, Ercc1 is essential for DNA repair processes, influencing genomic stability. The Ercc1Δ/-mouse model reveals its significance in vascular aging. Understanding Ercc1's function not only provides insights into normal biological processes but also offers potential implications for diseases related to DNA repair deficiencies and vascular aging.