847386-22-5Relevant articles and documents
Design and synthesis of novel benzothiophene analogs as selective estrogen receptor covalent antagonists against breast cancer
Bai, Chengfeng,Ren, Shengnan,Wu, Shuangjie,Zhu, Meiqi,Luo, Guoshun,Xiang, Hua
, (2021/05/27)
Endocrine therapy (ET) has benefited patients with estrogen receptor alpha (ERα) positive breast cancer for decades. Selective estrogen receptor modulator (SERM) such as Tamoxifen represents the clinical standard of care (SoC). Despite the therapeutic importance of current SoC agents, 30–50% of prolonged treatment patients inevitably generated resistant tumor cells, usually eventually suffered tumor relapse and developed into metastatic breast cancer (MBC), which was the leading cause of female cancer-related mortality. Among these, most resistant tumors remained dependent on ERα signaling, which reignited the need for the next generation of ERα related agents. We hypothesized that selective estrogen receptor covalent antagonists targeting ERα would provide a therapeutic alternative. In the current work, series of novel benzothiophene hybrids bearing electrophile moieties were synthesized and biologically evaluated. The representative analogue 15c exhibited potent anti-proliferative effect in MCF-7 cell lines in vitro, and further mechanism studies confirmed the necessity of covalent bonding. More importantly, 15c could attenuate the expression of TFF-1, GREB-1 and downregulate the levels of cellular ERα protein.
Discovery of LSZ102, a potent, orally bioavailable selective estrogen receptor degrader (SERD) for the treatment of estrogen receptor positive breast cancer
Tria, George S.,Abrams, Tinya,Baird, Jason,Burks, Heather E.,Firestone, Brant,Gaither, L. Alex,Hamann, Lawrence G.,He, Guo,Kirby, Christina A.,Kim, Sunkyu,Lombardo, Franco,Macchi, Kaitlin J.,McDonnell, Donald P.,Mishina, Yuji,Norris, John D.,Nunez, Jill,Springer, Clayton,Sun, Yingchuan,Thomsen, Noel M.,Wang, Chunrong,Wang, Jianling,Yu, Bing,Tiong-Yip, Choi-Lai,Peukert, Stefan
, p. 2837 - 2864 (2018/04/23)
In breast cancer, estrogen receptor alpha (ERα) positive cancer accounts for approximately 74% of all diagnoses, and in these settings, it is a primary driver of cell proliferation. Treatment of ERα positive breast cancer has long relied on endocrine therapies such as selective estrogen receptor modulators, aromatase inhibitors, and selective estrogen receptor degraders (SERDs). The steroid-based anti-estrogen fulvestrant (5), the only approved SERD, is effective in patients who have not previously been treated with endocrine therapy as well as in patients who have progressed after receiving other endocrine therapies. Its efficacy, however, may be limited due to its poor physicochemical properties. We describe the design and synthesis of a series of potent benzothiophene-containing compounds that exhibit oral bioavailability and preclinical activity as SERDs. This article culminates in the identification of LSZ102 (10), a compound in clinical development for the treatment of ERα positive breast cancer.
Selective Human Estrogen Receptor Partial Agonists (ShERPAs) for Tamoxifen-Resistant Breast Cancer
Xiong, Rui,Patel, Hitisha K.,Gutgesell, Lauren M.,Zhao, Jiong,Delgado-Rivera, Loruhama,Pham, Thao N. D.,Zhao, Huiping,Carlson, Kathryn,Martin, Teresa,Katzenellenbogen, John A.,Moore, Terry W.,Tonetti, Debra A.,Thatcher, Gregory R. J.
, p. 219 - 237 (2016/01/29)
Almost 70% of breast cancers are estrogen receptor α (ERα) positive. Tamoxifen, a selective estrogen receptor modulator (SERM), represents the standard of care for many patients; however, 30-50% develop resistance, underlining the need for alternative therapeutics. Paradoxically, agonists at ERα such as estradiol (E2) have demonstrated clinical efficacy in patients with heavily treated breast cancer, although side effects in gynecological tissues are unacceptable. A drug that selectively mimics the actions of E2 in breast cancer therapy but minimizes estrogenic effects in other tissues is a novel, therapeutic alternative. We hypothesized that a selective human estrogen receptor partial agonist (ShERPA) at ERα would provide such an agent. Novel benzothiophene derivatives with nanomolar potency in breast cancer cell cultures were designed. Several showed partial agonist activity, with potency of 0.8-76 nM, mimicking E2 in inhibiting growth of tamoxifen-resistant breast cancer cell lines. Three ShERPAs were tested and validated in xenograft models of endocrine-independent and tamoxifen-resistant breast cancer, and in contrast to E2, ShERPAs did not cause significant uterine growth.
