Role of gap junctions between keratinocyte and melanocyte in melanogenesis

Divya Padma, Kapaettu Satyamoorthy, Kumar M R Bhat

    Research output: Contribution to journalArticle

    Abstract

    The process of melanogenesis in melanocytes and the transport of melanin in the form of melanosomes to the neighboring keratinocytes are the key steps in human skin pigmentation. Keratinocytes and melanocytes interact in intricate manner to maintain the homeostasis. The present study was designed to understand the role of cell-cell interaction through the gap junctions between melanocytes and keratinocytes on melanogenesis. We show that, inhibition of the gap junctional activity between human keratinocytes and melanocytes in a coculture system using gap junction blocker lowers the expression of key regulatory genes of melanogenesis such as tyrosinase and microphthalmiaassociated transcription factor (MITF). This was followed by concurrent decrease in tyrosinase protein levels and activity. Our results show the preliminary evidence for the regulation of melanogenesis in melanocytes through direct gap junctional communication by keratinocytes. Deciphering the mechanism and factors involved in the process would uncover the significance of gap junctions in melanogenesis.

    Original languageEnglish
    Pages (from-to)495-502
    Number of pages8
    JournalFrontiers in Biology
    Volume10
    Issue number6
    DOIs
    Publication statusPublished - 01-12-2015

    Fingerprint

    melanogenesis
    melanin
    gap junctions
    melanocytes
    Gap Junctions
    Melanocytes
    keratinocytes
    homeostasis
    Keratinocytes
    skin
    human activity
    communication
    protein
    gene
    Monophenol Monooxygenase
    Skin Pigmentation
    Melanosomes
    Melanins
    coculture
    Regulator Genes

    All Science Journal Classification (ASJC) codes

    • Ecology, Evolution, Behavior and Systematics
    • Biotechnology
    • Genetics
    • Ecology

    Cite this

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    abstract = "The process of melanogenesis in melanocytes and the transport of melanin in the form of melanosomes to the neighboring keratinocytes are the key steps in human skin pigmentation. Keratinocytes and melanocytes interact in intricate manner to maintain the homeostasis. The present study was designed to understand the role of cell-cell interaction through the gap junctions between melanocytes and keratinocytes on melanogenesis. We show that, inhibition of the gap junctional activity between human keratinocytes and melanocytes in a coculture system using gap junction blocker lowers the expression of key regulatory genes of melanogenesis such as tyrosinase and microphthalmiaassociated transcription factor (MITF). This was followed by concurrent decrease in tyrosinase protein levels and activity. Our results show the preliminary evidence for the regulation of melanogenesis in melanocytes through direct gap junctional communication by keratinocytes. Deciphering the mechanism and factors involved in the process would uncover the significance of gap junctions in melanogenesis.",
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    Role of gap junctions between keratinocyte and melanocyte in melanogenesis. / Padma, Divya; Satyamoorthy, Kapaettu; Bhat, Kumar M R.

    In: Frontiers in Biology, Vol. 10, No. 6, 01.12.2015, p. 495-502.

    Research output: Contribution to journalArticle

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    AB - The process of melanogenesis in melanocytes and the transport of melanin in the form of melanosomes to the neighboring keratinocytes are the key steps in human skin pigmentation. Keratinocytes and melanocytes interact in intricate manner to maintain the homeostasis. The present study was designed to understand the role of cell-cell interaction through the gap junctions between melanocytes and keratinocytes on melanogenesis. We show that, inhibition of the gap junctional activity between human keratinocytes and melanocytes in a coculture system using gap junction blocker lowers the expression of key regulatory genes of melanogenesis such as tyrosinase and microphthalmiaassociated transcription factor (MITF). This was followed by concurrent decrease in tyrosinase protein levels and activity. Our results show the preliminary evidence for the regulation of melanogenesis in melanocytes through direct gap junctional communication by keratinocytes. Deciphering the mechanism and factors involved in the process would uncover the significance of gap junctions in melanogenesis.

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