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선택적 에스트로겐 수용체 조절제: 작용 기전 및 임상 자료의 고찰

Selective Estrogen Receptor Modulators: A Review of Action Mechanism and Clinical Data

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초록

Selective estrogen receptor modulators (SERMs) are a diverse group of synthetic non-steroidal compounds that have various levels of estrogen receptor (ER) agonist or antagonist activity depending on the target tissue. This feature of SERMs could be explained by the differential expression of two ER isoforms (ERα or ERβ), the differential ER conformational change and the differential coregulatory proteins (coactivator or corepressor) in a selected tissue. Based on their efficacy and safety, SERMs have been used for the prevention and treatment of breast cancer (tamoxifene and toremifene), prevention and treatment of osteoporosis (relaoxifene and bazedoxifene), treatment for dyspareunia related to vulvovaginal atrophy (ospemifene) and treatment for vasomotor symptoms associated with menopause (tissue selective estrogen complex; TSEC). Many of the available SERMs are well-known for their anti-estrogenic effects in breast and for their estrogenic effects in bone. The effect on the endometrium have played a key role in differentiate SERMs in clinical practice. The effect of SERMs in the vagina also shows clear distinction among different SERMs. This review summarizes their action mechanism and describes their clinical findings in different target tissues. In the osteoporosis treatment, SERMs such as raloxifene and bazedoxifene is a safe and effective option for women who cannot tolerate or are unwilling to take bisphosphonates and may be appropriate for younger woman with the age of ≤70 years old who expect to remain on therapy for many years and are concerned about the long-term safety of bisphosphonates.

Abstract

Selective estrogen receptor modulators (SERMs) are a diverse group of synthetic non-steroidal compounds that have various levels of estrogen receptor (ER) agonist or antagonist activity depending on the target tissue. This feature of SERMs could be explained by the differential expression of two ER isoforms (ERα or ERβ), the differential ER conformational change and the differential coregulatory proteins (coactivator or corepressor) in a selected tissue. Based on their efficacy and safety, SERMs have been used for the prevention and treatment of breast cancer (tamoxifene and toremifene), prevention and treatment of osteoporosis (relaoxifene and bazedoxifene), treatment for dyspareunia related to vulvovaginal atrophy (ospemifene) and treatment for vasomotor symptoms associated with menopause (tissue selective estrogen complex; TSEC). Many of the available SERMs are well-known for their anti-estrogenic effects in breast and for their estrogenic effects in bone. The effect on the endometrium have played a key role in differentiate SERMs in clinical practice. The effect of SERMs in the vagina also shows clear distinction among different SERMs. This review summarizes their action mechanism and describes their clinical findings in different target tissues. In the osteoporosis treatment, SERMs such as raloxifene and bazedoxifene is a safe and effective option for women who cannot tolerate or are unwilling to take bisphosphonates and may be appropriate for younger woman with the age of ≤70 years old who expect to remain on therapy for many years and are concerned about the long-term safety of bisphosphonates.

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