Estrone sulfatase and its inhibitors.

Area of Science:

• Endocrinology and Oncology
• Medicinal Chemistry

Background:

• Approximately 40% of breast cancers are hormone-dependent, primarily driven by estradiol (E2).
• Aromatase (AR) inhibitors are used, but do not block local estrogen biosynthesis via alternative pathways.
• Estrone (E1) can be synthesized locally within tumor cells, necessitating alternative therapeutic targets.

Purpose of the Study:

• To review the development of steroid sulfatase (E1STS) inhibitors for breast cancer treatment.
• To highlight the importance of E1STS in regulating estrogen formation from estrone sulfate (E1S).
• To discuss the role of E1STS in the conversion of dehydroepiandrosterone sulfate (DHEAS) to dehydroepiandrosterone (DHEA).

Main Methods:

• Review of scientific literature on E1STS inhibitors.
• Evaluation of both steroidal and non-steroidal E1STS inhibitors.
• Summary of progress in the development of potent E1STS inhibitors.

Main Results:

• Significant progress has been made in developing potent E1STS inhibitors.
• Both steroidal and non-steroidal compounds have been investigated.
• E1STS inhibitors are considered crucial for targeting hormone-dependent breast cancer.

Conclusions:

• Inhibiting E1STS is a key strategy to overcome resistance to aromatase inhibitors in breast cancer.
• The development of potent E1STS inhibitors, both steroidal and non-steroidal, shows promise.
• Further research into E1STS inhibitors is warranted for effective breast cancer therapy.