Estriol sulfamate

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Estriol 3-sulfamate

Estriol sulfamate (EMATE), also known by its developmental code name J995, is a synthetic estrogen and a sulfamate ester of estriol. It is specifically a sulfatase inhibitor, which blocks the conversion of sulfate-conjugated, inactive estrogens into their active forms. This mechanism of action makes it a unique compound in the realm of endocrinology and pharmacology, particularly in the treatment of hormone-dependent conditions such as estrogen receptor-positive breast cancer.

Pharmacology[edit | edit source]

Estriol sulfamate acts primarily by inhibiting the enzyme steroid sulfatase, which is responsible for the hydrolysis of sulfate-conjugated estrogens. By preventing this conversion, EMATE reduces the overall levels of active estrogens in the body. This reduction is particularly beneficial in conditions where estrogen plays a role in disease progression, such as certain forms of breast cancer. Despite its inhibitory effects on estrogen activity, EMATE itself, due to its origin as a derivative of estriol, may retain some estrogenic activity, although this is significantly less potent compared to other estrogens like estradiol.

Clinical Applications[edit | edit source]

The primary application of Estriol sulfamate is in the field of oncology, where it has been explored as a therapeutic agent for the treatment of hormone-dependent cancers. Its unique mechanism of action complements the existing arsenal of anti-estrogens and aromatase inhibitors, offering a potential alternative or adjunct therapy for patients with estrogen receptor-positive breast cancer. However, the clinical development and application of EMATE are still under investigation, and its efficacy and safety profile require further elucidation through clinical trials.

Chemistry[edit | edit source]

Estriol sulfamate is a sulfamate ester of estriol, which belongs to the broader class of estrogen esters. The sulfamate moiety significantly alters the pharmacokinetic and pharmacodynamic properties of the parent compound, estriol, making it a potent inhibitor of steroid sulfatase. The chemical modification also impacts its metabolic stability, potentially enhancing its bioavailability and duration of action compared to estriol.

Research and Development[edit | edit source]

Research into Estriol sulfamate and its applications in medicine is ongoing. Early-stage clinical trials and preclinical studies have focused on its potential in treating estrogen receptor-positive breast cancer, with some investigations exploring its use in other hormone-dependent conditions. The development of EMATE highlights the continuing search for more effective and targeted therapies in the management of cancer and other diseases influenced by hormones.

Conclusion[edit | edit source]

Estriol sulfamate represents a novel approach in the modulation of estrogen activity, with significant potential in the treatment of hormone-dependent cancers. Its development and study contribute to the broader understanding of hormone action and inhibition, offering new avenues for therapeutic intervention. As research progresses, EMATE may find its place in the pharmacological management of breast cancer and potentially other conditions, expanding the options available to clinicians and patients alike.


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Contributors: Prab R. Tumpati, MD