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Expression Analysis of Mammalian Linker-histone Subtypes
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Human skin gene expression doesn't correlate with protein expression? Unless both parameters are quantified.

Edwin D Lephart1

  • 1Department of Physiology and Developmental Biology, The Neuroscience Center, Brigham Young University, Provo, UT, USA.

Journal of Cosmetic Dermatology
|May 26, 2017
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Summary

This study compared gene and protein expressions for skin biomarkers when treated with equol. Results showed a good correlation between gene and protein levels, validating in vitro findings for dermal health applications.

Keywords:
correlationequolgene arrayhuman skinprotein expression

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Area of Science:

  • Biochemistry
  • Dermatology
  • Molecular Biology

Background:

  • Cosmetic industry often uses in vitro gene array studies to validate in vivo claims for dermal health products.
  • Gene expression does not always correlate with protein expression, necessitating further investigation.
  • Quantifying both gene and protein expression requires significant time and investment.

Purpose of the Study:

  • To compare in vitro gene and protein expressions of key human skin biomarkers.
  • To assess the correlation between gene and protein expression for specific biomarkers when treated with equol.
  • To validate the utility of in vitro gene expression studies in predicting protein-level changes relevant to dermal health.

Main Methods:

  • In vitro testing of equol on human skin biomarkers.
  • Quantification of gene expression using gene arrays.
  • Quantification of protein expression.
  • Comparative analysis of gene and protein expression data for four biomarkers: collagen type I, elastin, matrix metalloproteinase 1, and matrix metalloproteinase 3.

Main Results:

  • Equol demonstrated stimulation of collagen type I and elastin gene and protein expressions.
  • Equol showed inhibition of matrix metalloproteinase 1 and 3 gene and protein expressions.
  • A good correspondence was observed between gene and protein expression levels for all tested biomarkers.

Conclusions:

  • In vitro gene expression data can reliably predict protein expression changes for the studied human skin biomarkers.
  • The findings support the use of in vitro gene array studies as a valid method for initial screening in cosmetic research.
  • Equol shows potential for enhancing dermal health through modulation of collagen, elastin, and matrix metalloproteinases.