Selective estrogen receptor degrader

A selective estrogen receptor degrader or downregulator (SERD) is a type of drug that selectively binds to the estrogen receptor (ER) and induces its degradation, and thus causes its downregulation.[1] SERDs are used in the treatment of estrogen receptor-positive breast cancer, particularly in cases where tumors have developed resistance to other forms of endocrine therapy, such as selective estrogen receptor modulators (SERMs) or aromatase inhibitors.[1]

The mechanism of action of SERDs involves binding to the estrogen receptor, leading to a conformational change that facilitates recruitment of cellular machinery to degrade the receptor protein. By promoting degradation of the estrogen receptor, SERDs effectively inhibit estrogen signaling within cancer cells, thereby suppressing tumor growth.

A common SERD used in clinical practice is fulvestrant. Fulvestrant is administered as an intramuscular injection and is indicated for the treatment of advanced breast cancer in postmenopausal women whose cancer has progressed following anti-estrogen therapy.

As of 2016 the only marketed SERD was fulvestrant (brand name Faslodex).[1] As of November 2016 other SERDs under development include brilanestrant and elacestrant.[2] The clinical success of fulvestrant led to efforts to discover and develop a parallel drug class of selective androgen receptor degraders (SARDs).[2]

Investigational

Fulvestrant requires intramuscular injections once every two weeks.[3] In response, pharmaceutical companies are currently developing oral SERDs. Among products in development are:[4]

Monofunction (ER ligand) hydrophobic tag degradation:

List of Selective Estrogen Receptor Degraders (SERDs)
Modality INN Research Code Sponsor Comment
Amcenestrant SAR 439859 Sanofi
"
Brilanestrant Genentech
"
Camizestrant AZD9833 AstraZeneca
"
Elacestrant Radius
"
Giredestrant Roche
"
Imlunestrant LY3484356 Eli Lilly
"
Palazestrant OP-1250 Olema Pharmaceuticals
"
H3B-6545 Eisai Co Ltd SERCA
"
ZB716 EnhancedBio/Zenopharm Fulvestrant boronic acid
carboxylate
Bexirestrant Menarini
"
Etacstil GW-5638 Bristol Myers-Squibb combined SERM and SERD
"
Rintodestrant G1T48 G1 Therapeutics
"
Taragarestrant D-0502 Inventisbio
"
LSZ102 Novartis
"
ZN-c5 Zentalis
?
SHR9549 Jiangsu Hengrui
Vepdegestrant ARV-471 Arvinas
"
AC 699 Accutar Biotechnology

The oral SERDs target ER-positive/HER2-negative breast cancer and are tested as monotherapy and in combination with other drugs such as the CDK inhibitor palbociclib (Ibrance).[5][6][7]

See also

References

  1. ^ a b c Lee CI, Goodwin A, Wilcken N (January 2017). "Fulvestrant for hormone-sensitive metastatic breast cancer". The Cochrane Database of Systematic Reviews. 1 (1): CD011093. doi:10.1002/14651858.CD011093.pub2. PMC 6464820. PMID 28043088.
  2. ^ a b Lai AC, Crews CM (February 2017). "Induced protein degradation: an emerging drug discovery paradigm". Nature Reviews. Drug Discovery. 16 (2): 101–114. doi:10.1038/nrd.2016.211. PMC 5684876. PMID 27885283.
  3. ^ "Injection-Site Pain With Large-Volume Intramuscular Injection of Fulvestrant Can Be Minimized". PracticeUpdate. Retrieved 2020-12-28.
  4. ^ "A blockbuster breast cancer niche has Roche and Sanofi in the lead". Evaluate.com. 2020-02-19. Retrieved 2020-12-28.
  5. ^ "Rintodestrant | oral selective estrogen receptor degrader (SERD) | G1 Therapeutics, Inc". www.g1therapeutics.com. Retrieved 2021-01-09.
  6. ^ Nalley C (5 February 2021). "Orally Bioavailable SERD Shows Promise in Certain Breast Cancer Patients". Oncology Times. 43 (3): 35. doi:10.1097/01.COT.0000734348.58210.24.
  7. ^ Bardia A, Linden HM, Ulaner GA, Chandarlapaty S, Gosselin A, Celanovic M, et al. (20 May 2019). "Phase 1/2 dose-escalation and expansion study investigating SAR439859 +/- palbociclib in postmenopausal women with estrogen receptor-positive (ER+)/HER2- metastatic breast cancer". Journal of Clinical Oncology. 37 (15_suppl): TPS1105. doi:10.1200/JCO.2019.37.15_suppl.TPS1105. S2CID 190898194.

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