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Related Experiment Videos

Estrogenic activity of phenol red.

W V Welshons1, M F Wolf, C S Murphy

  • 1Department of Human Oncology, University of Wisconsin Clinical Cancer Center, Madison 53792.

Molecular and Cellular Endocrinology
|June 1, 1988
PubMed
Summary
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Phenol red, a common pH indicator in cell culture, exhibits weak estrogenic activity, with varying impacts across different cell lines and experimental conditions. Its influence is modulated by cell type, serum concentration, and phenol red source.

Area of Science:

  • Cell Biology
  • Endocrinology
  • Biochemistry

Background:

  • Phenol red, a pH indicator in tissue culture media, is recognized as a weak estrogen.
  • Its impact on estrogen-sensitive cells is debated, necessitating further investigation into cell-specific responses.
  • Understanding these effects is crucial for accurate interpretation of estrogen action studies.

Purpose of the Study:

  • To investigate the variable effects of phenol red on different estrogen-responsive cell systems.
  • To identify factors influencing phenol red's estrogenic activity in cell culture.
  • To clarify the extent to which phenol red interferes with estrogen-related cellular responses.

Main Methods:

  • Assessed estrogenic stimulation of progesterone receptor and growth in MCF-7 and T47D cells.

Related Experiment Videos

  • Evaluated prolactin synthesis in rat pituitary cells and progesterone receptor in rat uterine cells.
  • Analyzed phenol red's binding affinity to the estrogen receptor and its cytotoxic effects.

    • Main Results:

    • MCF-7 cells demonstrated the highest sensitivity to phenol red's estrogenic effects.
    • Other cell systems (T47D, pituitary, uterine) showed less pronounced responses.
    • Phenol red binding to serum and variations in commercial sources influenced its activity; high serum concentrations reduced its impact.
    • Phenol red competed with estradiol for estrogen receptor binding, with an approximate relative binding affinity of 0.001.

    Conclusions:

    • Phenol red's estrogenic influence varies significantly among different cell types and experimental setups.
    • Factors such as serum binding, phenol red source, and cell sensitivity critically determine its impact.
    • Careful consideration of these variables is essential when using phenol red in estrogen-related cell culture research.