research Comparison of MMP1 gene expression and collagen percentage in response to polydioxanone, poly-L-lactic acid and polycaprolactone thread implantation in ageing rat skin
In this study, PDO, PLLA, and PCL thread implants in ageing rat skin did not alter MMP1 gene expression but maintained collagen levels similar to young skin without UV-B exposure, suggesting possible benefits for skin collagen but not gene expression modification.


