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Related Experiment Videos

Changing pattern of deiminated proteins in developing human epidermis.

Yukiko Tsuji1, Masashi Akiyama, Ken Arita

  • 1Department of Dermatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan.

The Journal of Investigative Dermatology
|April 26, 2003
PubMed
Summary
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Peptidylarginine deiminases (PADs) modify proteins during human skin development. This study maps deiminated proteins in embryonic epidermis, revealing their role in epidermal morphogenesis and keratinization.

Area of Science:

  • Biochemistry
  • Developmental Biology
  • Dermatology

Background:

  • Peptidylarginine deiminases (PADs) are calcium-dependent enzymes catalyzing protein deimination (arginine to citrulline conversion).
  • Deimination is implicated in epidermal differentiation, keratin filament dynamics, and skin development.

Purpose of the Study:

  • To investigate the spatiotemporal localization of deiminated proteins during human epidermal development.
  • To elucidate the role of PADs and protein deimination in human epidermal morphogenesis.

Main Methods:

  • Immunohistochemistry using anti-citrulline peptide and anti-chemically modified citrulline antibodies on embryonic human skin.
  • Immunoelectron microscopy to visualize deiminated proteins at the ultrastructural level.

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Main Results:

  • Deiminated proteins were detected sequentially in the periderm, intermediate, and cornified cell layers of developing human epidermis.
  • Distinct staining patterns emerged with different antibodies, reflecting specific citrullination events.
  • Immunoelectron microscopy confirmed deiminated proteins within the intermediate filament network.

Conclusions:

  • Protein deimination occurs in an orderly manner during human epidermal development.
  • PADs play a significant role in shaping the embryonic epidermis and keratinization processes.
  • Deiminated proteins are integral components of epidermal morphogenesis.