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Related Experiment Videos

Transferrin and epidermal growth.

H Hammar1, F Acevedo, S Naito

  • 1Department of Dermatology, Karolinska Hospital, Karolinska Institute, Stockholm, Sweden.

Acta Dermato-Venereologica
|January 1, 1990
PubMed
Summary
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Transferrin, particularly acidic fractions from human and fetal calf serum, significantly enhances keratinocyte growth in mouse ear explant cultures. This acidic transferrin shows promise for improving cell culture conditions, especially in serum-free media.

Area of Science:

  • Cell Biology
  • Dermatology
  • Biochemistry

Background:

  • Keratinocyte growth is crucial for skin regeneration and research.
  • Optimizing cell culture media is essential for reliable experimental outcomes.
  • Transferrin's role in cell proliferation is well-established but requires further characterization.

Purpose of the Study:

  • To investigate the effect of transferrin, specifically its different fractions, on keratinocyte growth in mouse ear explant cultures.
  • To compare the efficacy of transferrin isolated from various serum sources with commercially available transferrin.
  • To identify specific transferrin characteristics that promote keratinocyte outgrowth.

Main Methods:

  • Explant culture of mouse ear epidermis.
  • Fractionation of transferrin from human and fetal calf serum using DEAE-Sepharose 6B-CL chromatography.

Related Experiment Videos

  • Comparison of acidic and neutral transferrin fractions.
  • Culture in basal RPMI 1640 medium with supplements and serum-free conditions.
  • Isotachophoresis analysis of serum transferrin composition.

    • Main Results:

    • Transferrin addition improved keratinocyte outgrowth in explant cultures.
    • Acidic transferrin fractions from human and fetal calf serum were more effective than commercial transferrin.
    • Acidic transferrin was more abundant in serum from psoriatic patients compared to healthy subjects.
    • Diferric transferrin was used to control for iron saturation, with concentrations above 5 microM proving detrimental.
    • Partially purified acidic transferrin fractions (10-20 microg/ml) significantly enhanced outgrowth compared to neutral fractions.

    Conclusions:

    • Acidic forms of transferrin, particularly those isolated from human and fetal calf serum, are potent stimulators of keratinocyte outgrowth.
    • The composition of transferrin, specifically its acidic fraction content, may be relevant in conditions like psoriasis.
    • Optimized transferrin supplementation, especially acidic fractions, can enhance keratinocyte culture systems, including serum-free models.