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Melanosome Transport and Processing in Skin Pigmentation: Mechanisms and Targets for Pigmentation Modulation
Mengjing Bao1, Mathias Gempeler1, Remo Campiche1
1DSM-Firmenich, Wurmisweg 576, 4303 Kaiseraugst, Switzerland.
International Journal of Molecular Sciences
|September 13, 2025
Summary
Even skin tone requires understanding pigmentation. This review explores melanin transfer and processing in keratinocytes, not just melanin production, for better cosmetic and therapeutic strategies.
Area of Science:
- Dermocosmetics
- Cell Biology
- Biochemistry
Background:
- Pigmentation disorders like melasma and age spots significantly impact skin appearance.
- Melanin synthesis occurs in melanosomes within melanocytes and is transferred to keratinocytes.
- Disruptions in melanin production, melanosome transport, or post-transfer processing cause uneven skin tone.
Purpose of the Study:
- To review the critical, yet underexplored, stages of melanosome transport, transfer, and keratinocyte processing.
- To identify novel therapeutic and cosmetic targets for managing pigmentation disorders.
- To shift focus from solely inhibiting melanin production to a more comprehensive understanding of pigmentation regulation.
Main Methods:
- Literature review of scientific publications on skin pigmentation mechanisms.
- Analysis of research on melanosome dynamics and keratinocyte interactions.
- Synthesis of findings related to therapeutic interventions for hyperpigmentation.
Main Results:
- Melanosome transport and transfer to keratinocytes are crucial steps influencing visible pigmentation.
- Keratinocyte-mediated processing of melanosomes plays a significant role in pigmentation outcomes.
- Traditional tyrosinase inhibitors offer incomplete solutions for pigmentation irregularities.
Conclusions:
- Targeting melanosome transport and keratinocyte processing offers promising avenues for managing pigmentation disorders.
- A comprehensive approach addressing all stages of pigmentation is needed for effective dermocosmetic strategies.
- Further research into these later stages can lead to innovative treatments for uneven skin tone.
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