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Cyclooxygenase-2 inhibitors modulate skin aging in a catalytic activity-independent manner

Mi Eun Lee1, So Ra Kim, Seungkoo Lee

  • 1Department of Biochemistry and Molecular Biology, Institute of Medical Sciences, Kangwon National University School of Medicine, Chuncheon 200-701, Korea.

Experimental & Molecular Medicine
|July 10, 2012
PubMed

Insights

Cyclooxygenase-2 (COX-2) inhibitors

Area of Science:

  • Biochemistry
  • Dermatology
  • Gerontology

Background:

  • The pro-inflammatory activity of cyclooxygenase-2 (COX-2) is implicated in aging.
  • Its causal role in aging and the potential of COX-2 inhibitors to prevent aging remain undetermined.

Purpose of the Study:

  • To investigate the effects of COX-2 inhibitors on skin aging using a hairless mouse model.
  • To determine if COX-2 activity is a causal factor in skin aging.

Main Methods:

  • Utilized a hairless mouse model for intrinsic skin aging.
  • Administered selective COX-2 inhibitors (NS-398, celecoxib) and a non-selective COX inhibitor (aspirin).
  • Assessed skin aging markers, including p53, p16, type I procollagen, and caveolin-1 expression.

Main Results:

  • Only NS-398 inhibited skin aging; celecoxib and aspirin accelerated it.
  • NS-398 decreased p53 and p16 expression, while celecoxib and aspirin increased them.
  • Inhibitor effects correlated with changes in type I procollagen and caveolin-1 expression.

Conclusions:

  • Pro-inflammatory COX-2 activity is not a direct cause of skin aging.
  • COX-2 inhibitors can modulate skin aging, potentially by regulating type I procollagen and caveolin-1.
  • Different COX-2 inhibitors have distinct effects on skin aging processes.

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