The Diatom Odontella aurita Modulates Melanogenesis in B16-F0 Cell Line

Area of Science:

• Biochemistry
• Dermatology
• Marine Biology

Background:

• Melanin protects skin from UV damage and is crucial for treating hypopigmentation disorders.
• Natural compounds modulating melanogenesis are of significant interest for therapeutic applications.
• Diatoms, like Odontella aurita, are increasingly explored for bioactive compounds.

Purpose of the Study:

• To investigate the effects of Odontella aurita methanolic extract on melanogenesis in B16-F0 murine melanoma cells.
• To evaluate the extract's impact on melanin content, tyrosinase activity, and related gene/protein expression.
• To analyze the extract's composition and its influence on the cellular antioxidant environment.

Main Methods:

• Cell culture of B16-F0 murine melanoma cells.
• Treatment with Odontella aurita methanolic extract.
• Quantification of melanin content and tyrosinase activity.
• Analysis of melanogenesis-related gene (TYR, TRP1, TRP2) and protein expression.
• Metabolomic and biochemical analyses of the extract.

Main Results:

• Odontella aurita extract significantly increased melanin content by 45% (p < 0.01).
• Tyrosinase activity was elevated by 38% after 24 hours (p < 0.01).
• Upregulation of Tyrosinase (TYR), TRP1, and TRP2 gene/protein expression was observed at specific time points.
• The extract enhanced the cellular antioxidant environment by increasing metabolic cofactors and pigment precursors.

Conclusions:

• Odontella aurita methanolic extract effectively accelerates and sustains melanin synthesis and tyrosinase activity.
• The extract's mechanism differs from single-compound inducers, suggesting a synergistic effect.
• Findings support the potential of Odontella aurita for treating pigmentary disorders and enhancing skin health.
• Further in vivo studies are warranted for efficacy, safety, and cosmeceutical/nutraceutical applications.