Cited by 82melanin and skin pigmentationMicroRNA in disease regulationMelanoma and MAPK Pathways

MicroRNA-203 regulates melanosome transport and tyrosinase expression in melanoma cells by targeting kinesin superfamily protein 5b

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Noguchi, Shunsuke, Kumazaki, Minami, Yasui, Yuki, Mori, Takashi, Yamada, Nami, Akao, Yukihiro·2014·Journal of Investigative Dermatology

Abstract

MicroRNA (miR)-203 is known to be downregulated and to act as an anti-oncomir in melanoma cells. At present, we found that exogenous miR-203 increased pigmentation and protein expression levels of the melanoma antigen recognized by T cells (Melan-As/MART1s) and/or tyrosinase (TYR) in the human melanoma cells tested. Inversely, treatment with an inhibitor of miR-203 downregulated the expression level of TYR. The target gene of miR-203 involved in the mechanism was kinesin superfamily protein 5b (kif5b), which was revealed by gene silencing using short interfering RNA and luciferase activity assay. Furthermore, immunocytochemistry showed obvious accumulation of melanosomes around nuclei of human melanoma Mewo cells transfected with miR-203 or siR-kif5b. Importantly, treatment with the miR-203 inhibitor, but not miR-203, exhibited effects on human epidermal melanocytes isolated from lightly pigmented adult skin similar to those on melanoma cells. In addition, the data indicated that exogenous miR-203 also negatively regulated the cAMP response element-binding protein 1 (CREB1)/microphthalmia-associated transcription factor (MITF)/Rab27a pathway, which is one of the main pathways active in melanoma cells. In conclusion, our data indicated that anti-oncogenic miR-203 had a pivotal role in melanoma through reducing melanosome transport and promoting melanogenesis by targeting kif5b and through negative regulation of the CREB1/MITF/Rab27a pathway.

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  • Melanosome transport to the periphery of melanocytes precedes their transfer to neighboring keratinocytes.

    “Melanosome transport to the periphery of melanocytes precedes their transfer to neighboring keratinocytes [ 32 , 33 , 34 ].”

    From Melanin's Journey from Melanocytes to Keratinocytes: Uncovering the Molecular Mechanisms of Melanin Transfer and Processing (2023) · cites this paper as [33]

    The Introduction (page unavailable) says melanosomes are transported from near the nucleus to the plasma membrane, supporting movement to the melanocyte periphery. Our copy does not describe their subsequent transfer to neighboring keratinocytes, so it does not establish the full sequence claimed. (LLM, conf=0.85)

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  1. [3]3. S Noguchi et al. miR-203 Regulates Melanosome Transpsort 468 Journal of Investigative Dermatology (2014), Volume 134 https://www.sciencedirect.com/journal/journal-of-investigative-dermatology

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Authors
Noguchi, S., Kumazaki, M., Yasui, Y., Mori, T., Yamada, N., & Akao, Y.
Affiliations
Gifu University (JP)
Corresponding author
Noguchi, Shunsuke
Venue
Journal of Investigative Dermatology
Publisher
Elsevier BV
Published
2014-02
Volume
134
Issue
2
Pages
461-469
ISSN
0022-202X (ISSN-L)
OpenAlex
W1984811431
Cited by
82
References
34
Citations by year
2026: 2 · 2025: 6 · 2024: 7 · 2023: 8 · 2022: 3 · 2021: 8 · 2020: 7 · 2019: 8 · 2018: 3 · 2017: 4 · 2016: 4 · 2015: 13 · 2014: 9
FWCI
5.02
Type
journal article
Language
en
Open access
Locations
  • Journal of Investigative Dermatology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
Keywords
miR-203, KIF5B, melanosome transport, tyrosinase, melanoma, melanogenesis, epidermal melanocytes, CREB1, MITF, Rab27a, microRNA target regulation
MeSH terms
Epidermal Cells, Biological Transport, Humans, Melanocytes, Melanoma, Skin Neoplasms, Monophenol Monooxygenase, Signal Transduction, Kinesins, Myosin Heavy Chains, Melanosomes, Myosin Type V, RNA, Small Interfering, MicroRNAs, Cell Line, Tumor, Cell Proliferation

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