Diphlorethohydroxycarmalol Attenuates Fine Particulate Matter-Induced Subcellular Skin Dysfunction.

Area of Science:

• Dermatology
• Environmental Science
• Biochemistry

Background:

• The skin is susceptible to environmental aggressors like fine particulate matter (PM_2.5).
• PM_2.5 exposure can induce oxidative stress, DNA damage, and inflammation in skin cells.
• Diphlorethohydroxycarmalol (DPHC), a marine-derived compound, exhibits antioxidant properties.

Purpose of the Study:

• To investigate the protective effects of DPHC against PM_2.5-induced skin damage.
• To elucidate the underlying molecular mechanisms of DPHC's protective action.
• To evaluate DPHC's efficacy in both in vitro and in vivo models.

Main Methods:

• In vitro studies using human keratinocytes exposed to PM_2.5.
• In vivo studies using HR-1 hairless mice exposed to PM_2.5.
• Assessment of reactive oxygen species (ROS) generation, DNA damage, endoplasmic reticulum (ER) stress, autophagy, lipid peroxidation, protein carbonylation, epidermal thickness, apoptosis, and mitogen-activated protein kinase (MAPK) signaling.

Main Results:

• DPHC significantly inhibited PM_2.5-induced ROS generation in keratinocytes.
• DPHC protected skin cells from PM_2.5-induced DNA damage, ER stress, and autophagy.
• In vivo, DPHC treatment reduced PM_2.5-induced lipid peroxidation, protein carbonylation, epidermal hyperplasia, and apoptosis.
• DPHC attenuated PM_2.5-induced MAPK signaling pathway activation.

Conclusions:

• DPHC demonstrates significant protective effects against PM_2.5-induced skin damage.
• DPHC mitigates oxidative stress, DNA damage, ER stress, autophagy dysfunction, and apoptosis.
• The MAPK signaling pathway is implicated in PM_2.5-induced skin damage, and DPHC's action involves modulation of this pathway.