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Prospéri MT, Giordano C, Gomez-Duro M, Hurbain I, Macé AS, Raposo G, D’Angelo G. Extracellular vesicles released by keratinocytes regulate melanosome maturation, melanocyte dendricity, and pigment transfer. Proc Natl Acad Sci U S A 2024; 121:e2321323121. [PMID: 38607931 PMCID: PMC11032449 DOI: 10.1073/pnas.2321323121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 03/07/2024] [Indexed: 04/14/2024] Open
Abstract
Extracellular vesicles (EVs) facilitate the transfer of proteins, lipids, and genetic material between cells and are recognized as an additional mechanism for sustaining intercellular communication. In the epidermis, the communication between melanocytes and keratinocytes is tightly regulated to warrant skin pigmentation. Melanocytes synthesize the melanin pigment in melanosomes that are transported along the dendrites prior to the transfer of melanin pigment to keratinocytes. EVs secreted by keratinocytes modulate pigmentation in melanocytes [(A. Lo Cicero et al., Nat. Commun. 6, 7506 (2015)]. However, whether EVs secreted by keratinocytes contribute to additional processes essential for melanocyte functions remains elusive. Here, we show that keratinocyte EVs enhance the ability of melanocytes to generate dendrites and mature melanosomes and promote their efficient transfer. Further, keratinocyte EVs carrying Rac1 induce important morphological changes, promote dendrite outgrowth, and potentiate melanin transfer to keratinocytes. Hence, in addition to modulating pigmentation, keratinocytes exploit EVs to control melanocyte plasticity and transfer capacity. These data demonstrate that keratinocyte-derived EVs, by regulating melanocyte functions, are major contributors to cutaneous pigmentation and expand our understanding of the mechanism underlying skin pigmentation via a paracrine EV-mediated communication.
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Affiliation(s)
- Marie-Thérèse Prospéri
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris Cedex 0575248, France
| | - Cécile Giordano
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris Cedex 0575248, France
| | - Mireia Gomez-Duro
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris Cedex 0575248, France
| | - Ilse Hurbain
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris Cedex 0575248, France
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Cell and Tissue Imaging Facility (The Cell and Tissue Imaging Platform (PICT-IBiSA)), Paris Cedex 0575248, France
| | - Anne-Sophie Macé
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris Cedex 0575248, France
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Cell and Tissue Imaging Facility (The Cell and Tissue Imaging Platform (PICT-IBiSA)), Paris Cedex 0575248, France
| | - Graça Raposo
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris Cedex 0575248, France
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Cell and Tissue Imaging Facility (The Cell and Tissue Imaging Platform (PICT-IBiSA)), Paris Cedex 0575248, France
| | - Gisela D’Angelo
- Institut Curie, Paris Sciences & Letters Research University, CNRS, UMR144, Structure and Membrane Compartments, Paris Cedex 0575248, France
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