The effect of anthralin (dithranol) on mitochondria

Area of Science:

• Dermatology
• Cell Biology
• Biochemistry

Background:

• Topical anthralin (dithranol) is used to treat psoriasis.
• The precise cellular mechanisms underlying anthralin's therapeutic effects are not fully understood.

Purpose of the Study:

• To investigate the short-term effects of topical anthralin on normal human skin at the cellular level.
• To elucidate the biochemical mechanism by which anthralin exerts its effects.

Main Methods:

• Electron microscopy was used to examine normal human skin after topical anthralin application.
• In vitro experiments were conducted on isolated rat liver mitochondria to assess anthralin's biochemical activity.

Main Results:

• Electron microscopy revealed significant damage to mitochondria in epidermal cells following anthralin treatment.
• Other cellular structures, including nuclear and cytoplasmic membranes, remained unaffected.
• In vitro studies demonstrated that anthralin functions as an uncoupler of oxidative phosphorylation in isolated mitochondria.

Conclusions:

• Anthralin inhibits adenosine triphosphate (ATP) production in epidermal cells by uncoupling oxidative phosphorylation.
• This disruption of cellular energy supply in keratinocytes is a potential explanation for anthralin's therapeutic efficacy in psoriasis treatment.