Erleada（apalutamide）-前列腺癌新靶向药，可延长无转移生存期超2年
近日，美国FDA批准新一代雄激素受体抑制剂Erleada（apalutamide），用于治疗非转移性去势抵抗性前列腺癌（NM-CRPC）患者。这些患者虽然在接受激素治疗，但肿瘤仍继续增长。值得一提的是，它是首个经FDA批准的用于非转移性去势抵抗性前列腺癌的疗法。
Erleada是一款适合这类患者的疗法。作为一款雄激素受体抑制剂，它能阻断雄激素的作用，抑制肿瘤生长。
批准日期：2018年2月22日 公司：强生
ERLEADATM(阿帕鲁他胺 [apalutamide])片，为口服使用
美国初次批准–2018
作用机制
Apalutamide是一种雄激素受体(AR)抑制剂直接地结合至AR的配体-结合结构域。Apalutamide 抑制AR核转位，抑制DNA结合，和妨碍AR -介导的转录。一个主要代谢物，N-desmethyl apalutamide，是一个效力较弱AR抑制剂，和表现出apalutamide活性的三分之一在一项体外转录受体分析。 Apalutamide给药致减低的肿瘤细胞增殖和增加凋亡导致减低肿瘤容积在前列腺小鼠移植物模型。
适应证和用途
ERLEADA是一种雄激素受体抑制剂适用为有非-转移去势-抗性前列腺癌患者的治疗。
剂量和给药方法
ERLEADA 240mg(四60mg片)每天一次口服给予。整吞片。ERLEADA可被有或无食物服用。
患者还应接受一种促性腺激素释放激素(GnRH)类似物同时地或应曽有双侧睾丸切除。
剂型和规格
片: 60mg
禁忌证
妊娠。
警告和注意事项
●接受ERLEADA患者分别发生跌倒和骨折16%和12%。评价患者对骨折和跌倒风险，和根据已确定指导原则用骨靶向药剂治疗患者。
●癫痫发生在0.2%的接受ERLEADA患者。治疗期间发生癫痫的患者永久地终止ERLEADA。
不良反应
最常见不良反应(≥10%)为疲乏，高血压，皮疹，腹泻，恶心，体重减轻，关节痛，跌倒，热潮红，食欲减低，骨折，和周围水肿。
药物相互作用
●与药物是CYP3A4，CYP2C19，CYP2C9，UGT，P-gp，BCRP，或OATP1B1的敏感底物同时使用可能导致这些药物丧失活性。
在特殊人群中使用
●生殖潜能的女性和男性: 建议男性有生殖潜能女性伴侣的男性使用有效避孕。
如何供应/贮存和处置
ERLEADA(apalutamide) 60mg膜包衣片为略微黄至灰绿色椭圆形片在一侧凹陷有“AR 60”。 ERLEADA 60mg片是可得到在120片瓶。每瓶含硅胶干燥剂。
NDC 号59676 600
贮存和处置
贮存在20°C至25°C(68°F至77°F); 外出允许至15°C至30°C(59°F至86°F) [见USP控制室温].
贮存在原始包装，。不要遗弃干燥剂。避光和潮湿保护。
ERLEADATM (apalutamide) tablets, for oral use
Initial U.S. Approval – 2018
IMPORTANT SAFETY INFORMATION
CONTRAINDICATIONS
Pregnancy — ERLEADA™ (apalutamide) can cause fetal harm and potential loss of pregnancy.
WARNINGS AND PRECAUTIONS
Falls and Fractures — In a randomized study (SPARTAN), falls and fractures occurred in 16% and 12% of patients treated with ERLEADA™ compared to 9% and 7% treated with placebo, respectively. Falls were not associated with loss of consciousness or seizure. eva luate patients for fracture and fall risk. Monitor and manage patients at risk for fractures according to established treatment guidelines and consider use of bone targeted agents.
Seizure —In a randomized study (SPARTAN), 2 patients (0.2%) treated with ERLEADA™ experienced a seizure. Permanently discontinue ERLEADA™ in patients who develop a seizure during treatment. It is unknown whether anti-epileptic medications will prevent seizures with ERLEADA™. Advise patients of the risk of developing a seizure while receiving ERLEADA™ and of engaging in any activity where sudden loss of consciousness could cause harm to themselves or others.
ADVERSE REACTIONS
Adverse Reactions—The most common adverse reactions (≥10%) were fatigue, hypertension, rash, diarrhea, nausea, weight decreased, arthralgia, fall, hot flush, decreased appetite, fracture, and peripheral edema.
Laboratory Abnormalities—All Grades (Grade 3-4)
Hematology—anemia ERLEADA™ 70% (0.4%), placebo 64% (0.5%); leukopenia ERLEADA™ 47% (0.3%), placebo 29% (0%); lymphopenia ERLEADA™ 41% (2%), placebo 21% (2%)
Chemistry—hypercholesterolemia ERLEADA™ 76% (0.1%), placebo 46% (0%); hyperglycemia ERLEADA™ 70% (2%), placebo 59% (1%); hypertriglyceridemia ERLEADA™ 67% (2%), placebo 49% (0.8%); hyperkalemia ERLEADA™ 32% (2%), placebo 22% (0.5%)
Rash — Rash was most commonly described as macular or maculo-papular. Adverse reactions  were 24% with ERLEADA™ versus 6% with placebo. Grade 3 rashes (defined as covering > 30% body surface area [BSA]) were reported with ERLEADA™ treatment (5%) versus placebo (0.3%).
The onset of rash occurred at a median of 82 days. Rash resolved in 81% of patients within a median of 60 days (range: 2 to 709 days) from onset of rash. Four percent of patients treated with ERLEADA™ received systemic corticosteroids. Rash recurred in approximately half of patients who were re-challenged with ERLEADA™.
Hypothyroidism was reported for 8% of patients treated with ERLEADA™ and 2% of patients treated with placebo based on assessments of thyroid-stimulating hormone (TSH) every 4 months. Elevated TSH occurred in 25% of patients treated with ERLEADA™ and 7% of patients treated with placebo. The median onset was day 113. There were no Grade 3 or 4 adverse reactions. Thyroid replacement therapy, when clinically indicated, should be initiated or dose-adjusted.
DRUG INTERACTIONS
Effect of Other Drugs on ERLEADA™ —Co-administration of a strong CYP2C8 or CYP3A4 inhibitor is predicted to increase the steady-state exposure of the active moieties. No initial dose adjustment is necessary; however, reduce the ERLEADA™ dose based on tolerability [see Dosage and Administration (2.2)].
Effect of ERLEADA™ on Other Drugs —ERLEADA™ is a strong inducer of CYP3A4 and CYP2C19, and a weak inducer of CYP2C9 in humans. Concomitant use of ERLEADA™ with medications that are primarily metabolized by CYP3A4, CYP2C19, or CYP2C9 can result in lower exposure to these medications. Substitution for these medications is recommended when possible or eva luate for loss of activity if medication is continued. Concomitant administration of ERLEADA™ with medications that are substrates of UDP-glucuronosyl transferase (UGT) can result in decreased exposure. Use caution if substrates of UGT must be co-administered with ERLEADA™ and eva luate for loss of activity.
P-gp, BCRP, or OATP1B1 Substrates — Apalutamide is a weak inducer of P-glycoprotein (P-gp), breast cancer resistance protein (BCRP), and organic anion transporting polypeptide 1B1 (OATP1B1) clinically. Concomitant use of ERLEADA™ with medications that are substrates of P-gp, BCRP, or OATP1B1 can result in lower exposure of these medications. Use caution if substrates of P-gp, BCRP, or OATP1B1 must be co-administered with ERLEADA™ and eva luate for loss of activity if medication is continued.
Full prescribing information will be available soon at www.ERLEADA.com.
http://www.janssenlabels.com/package-insert/product
-monograph/prescribing-information/ERLEADA-pi.pdf