Palacios Santiago, Currie Heather, Mikkola Tomi S, Dragon Erika
Instituto Palacios, Madrid, Spain.
NHS Dumfries & Galloway, Dumfries, Scotland, United Kingdom.
Maturitas. 2015 Apr;80(4):435-40. doi: 10.1016/j.maturitas.2015.01.003. Epub 2015 Jan 24.
Current guidelines recommend that hormone therapy (HT) in postmenopausal women with a uterus include a progestin to protect against endometrial hyperplasia. However, many concerns relating to HT use appear to be related to the progestin component, including cardiovascular risk, breast stimulation, and irregular vaginal bleeding. Conjugated estrogens (CE) combined with the selective estrogen receptor modulator bazedoxifene (BZA) is a new progestin-free HT option for alleviating estrogen deficiency symptoms in postmenopausal women with a uterus for whom treatment with progestin-containing therapy is not appropriate. Five double-blind, randomized, placebo-controlled, phase 3 studies, known as the Selective estrogens, Menopause, And Response to Therapy (SMART) trials have investigated the efficacy of CE/BZA for relieving vasomotor symptoms (VMS), and effect on bone mass, as well as endometrial and breast safety in postmenopausal women. In a 12-week study, CE 0.45 mg/BZA 20 mg significantly reduced the number and severity of hot flushes compared with placebo at weeks 4 and 12. Unlike estrogen-progestin therapy (EPT), CE 0.45 mg/BZA 20 mg did not increase breast density compared with placebo. In clinical trials up to 2 years, CE/BZA had a favorable tolerability profile, demonstrated by amenorrhea rates similar to placebo. Vascular disorders including venous thromboembolic events (pulmonary embolism, retinal vein thrombosis, deep vein thrombosis, and thrombophlebitis) were rare events, occurring in less than 1 per 1000 patients. CE/BZA was associated with significantly higher incidences of amenorrhea and lower incidences of bleeding compared with CE/medroxyprogesterone acetate in 2 comparative trials. Therefore, CE 0.45 mg/BZA 20mg provides an effective, well-tolerated, progestin-free alternative to EPT for postmenopausal women with a uterus.
当前指南建议,有子宫的绝经后女性进行激素治疗(HT)时应包含孕激素,以预防子宫内膜增生。然而,许多与HT使用相关的担忧似乎与孕激素成分有关,包括心血管风险、乳腺刺激和不规则阴道出血。结合雌激素(CE)与选择性雌激素受体调节剂巴多昔芬(BZA)联合使用,是一种不含孕激素的新型HT选择,适用于有子宫且不适合接受含孕激素治疗的绝经后女性,用于缓解雌激素缺乏症状。五项双盲、随机、安慰剂对照的3期研究,即选择性雌激素、绝经与治疗反应(SMART)试验,研究了CE/BZA缓解血管舒缩症状(VMS)的疗效、对骨量的影响以及绝经后女性的子宫内膜和乳腺安全性。在一项为期12周的研究中,与安慰剂相比,在第4周和第12周时,0.45 mg CE/20 mg BZA显著减少了潮热的次数和严重程度。与雌激素 - 孕激素疗法(EPT)不同,与安慰剂相比,0.45 mg CE/20 mg BZA并未增加乳腺密度。在长达2年的临床试验中,CE/BZA具有良好的耐受性,闭经率与安慰剂相似。包括静脉血栓栓塞事件(肺栓塞、视网膜静脉血栓形成、深静脉血栓形成和血栓性静脉炎)在内的血管疾病是罕见事件,每1000名患者中发生不到1例。在两项比较试验中,与CE/醋酸甲羟孕酮相比,CE/BZA的闭经发生率显著更高,出血发生率更低。因此,对于有子宫的绝经后女性,0.45 mg CE/20mg BZA为EPT提供了一种有效、耐受性良好且不含孕激素的替代方案。