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Related Experiment Video

Updated: Jun 24, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

[Not Available].

C Lafforgue1, M T Zabot, J Cotte

  • 1CED, 181 avenue J. JAURES-69007 Lyon, France.

International Journal of Cosmetic Science
|March 18, 2009
PubMed
Summary
This summary is machine-generated.

Cellular aging patterns were studied in normal dermal human fibroblasts (NDHF). Metabolic changes in vitro mirrored in vivo aging, suggesting potential for anti-aging product selection.

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Area of Science:

  • Dermatology
  • Cell Biology
  • Gerontology

Background:

  • Cellular senescence is a key aspect of aging.
  • Understanding in vitro aging models is crucial for studying age-related changes and developing interventions.
  • Normal dermal human fibroblasts (NDHF) offer a relevant model for skin aging research.

Purpose of the Study:

  • To investigate cellular aging patterns in NDHF.
  • To compare in vitro aging characteristics with in vivo donor age.
  • To evaluate the potential of metabolic changes as biomarkers for anti-aging product efficacy.

Main Methods:

  • NDHF from donors of various ages (10-69 years) were cultured to the 30th passage.
  • Cell growth characteristics (growth rate, DNA content, DNA repair) were assessed.

Related Experiment Videos

Last Updated: Jun 24, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

  • Metabolic characteristics including lysosomal enzymatic activity and collagen I/III biosynthesis were analyzed.

    • Main Results:

    • In vitro aging primarily affected the oldest donor strain, showing decreased cellular density.
    • In vitro aging did not alter DNA replication rate or DNA repair capacity.
    • Lysosomal activity increased, while Type I collagen synthesis decreased with in vitro aging.
    • Metabolic changes observed in vitro correlated with in vivo aging.

    Conclusions:

    • In vitro proliferating potential does not fully reflect in vivo aging.
    • Metabolic changes in NDHF during in vitro aging serve as a reliable indicator of in vivo aging.
    • These metabolic markers could be valuable for screening and selecting anti-aging products.