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Elevated steroid sulfatase expression in breast cancers.

T Utsumi1, N Yoshimura, S Takeuchi

  • 1Department of Surgery, Fujita Health University, School of Medicine, Toyoake, Aichi, Japan. tutsumi@fujita-hu.ac.jp

The Journal of Steroid Biochemistry and Molecular Biology
|August 5, 2000
PubMed
Summary

Increased steroid sulfatase expression in breast cancer tissues contributes to higher estrogen levels. This local estrogen overproduction may fuel tumor cell growth, highlighting steroid sulfatase as a potential therapeutic target.

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Area of Science:

  • Biochemistry
  • Oncology
  • Molecular Biology

Background:

  • In situ estrogen synthesis is crucial for high estrogen levels in breast cancer tissues.
  • Steroid sulfatase (STS) enzyme is implicated in hydrolyzing sulfated steroids, potentially influencing local estrogen production.

Purpose of the Study:

  • To investigate the role of steroid sulfatase in breast cancer by assessing its mRNA levels.
  • To determine if STS expression is elevated in breast malignancies compared to non-malignant tissues.

Main Methods:

  • Utilized reverse transcription and polymerase chain reaction (RT-PCR) to quantify STS mRNA levels.
  • Analyzed breast cancer tissues and adjacent non-malignant tissues from 38 patients.

Main Results:

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  • Steroid sulfatase mRNA levels were significantly higher in breast cancer tissues (1458.4±2119.7 attomoles/mg RNA) compared to non-malignant tissues (535.6±663.4 attomoles/mg RNA).
  • P-value < 0.001 indicated a statistically significant difference.

Conclusions:

  • Elevated steroid sulfatase expression is observed in breast cancer.
  • Increased STS may contribute to local estrogen overproduction, potentially promoting tumor cell growth and proliferation.