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Related Experiment Videos

Predesquamin inhibits desquamation

M M Brysk1, C Santschi, T Bell

  • 1Department of Dermatology, University of Texas Medical Branch, Galveston 77555.

Experimental Cell Research
|December 1, 1993
PubMed
Summary

Predesquamin, a glycoprotein from human epidermis, prevents premature skin cell shedding. This discovery offers new insights into skin barrier function and desquamation processes.

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Erratum: MELZER, S., HITCHMOUGH, R.A., BELL, T., CHAPPLE, D.G. PATTERSON, G.B. (2019) Lost and Found: Taxonomic revision of the speckled skink (Oligosoma infrapunctatum; Reptilia; Scincidae) species complex fromNew Zealand reveals a potential cryptic extinction, resurrection of two species, and description of three new species. Zootaxa 4623 (3):  441-484.

Zootaxa·2019

Area of Science:

  • Dermatology
  • Biochemistry
  • Cell Biology

Background:

  • Predesquamin is a 650 kDa Concanavalin A binding glycoprotein identified in human epidermis.
  • Understanding the role of epidermal glycoproteins in skin structure and shedding is crucial for dermatological research.

Purpose of the Study:

  • To isolate and characterize predesquamin.
  • To develop a polyclonal antibody for predesquamin localization.
  • To investigate predesquamin's role in regulating keratinocyte desquamation.

Main Methods:

  • Isolation and characterization of predesquamin.
  • Preparation of a polyclonal antibody against predesquamin.
  • Refinement of a desquamation model using Ca(2+)-specific chelators and assessing predesquamin's inhibitory effects on squame shedding.

Main Results:

  • The antibody successfully labeled the lower stratum corneum in both normal skin and plantar callus.
  • A refined desquamation model demonstrated that elevated Ca(2+) concentrations suppress shedding.
  • Predesquamin was shown to inhibit squame shedding in a dose-dependent manner at nanomolar concentrations.

Conclusions:

  • Predesquamin plays a significant role in preventing premature desquamation of the lower stratum corneum.
  • The findings suggest predesquamin is a key regulator of skin barrier integrity.

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