昨天,Teva Pharmaceutical Industries宣布,美国FDA已经批准了该公司新药产品AUSTEDO(deutetrabenazine)片剂用于治疗与亨廷顿舞蹈症相关的“舞蹈病症状“(chorea)。AUSTEDOTM是FDA批准的第一个氘代产品,也是获得FDA批准的针对亨廷顿舞蹈病的历史上第二个药物。该产品以前曾由FDA授予孤儿药资格认定。
亨廷顿舞蹈症是一种罕见且致命的神经退行性疾病,在美国范围内,影响约超过3.5万病人群体。“舞蹈病症状”是亨廷顿舞蹈症最显见的症状,近90%的亨廷顿患者在患病时期都会出现包括上下肢、面部或躯体的抽搐和不自主运动。
Deutetrabenazine (原名SD-809) 是一类囊泡单胺转运体2(vesicular monoamine transporter 2,VMAT2)抑制剂。
神经递质以囊泡的形式贮存在神经元中,某些神经递质的贮存,则是由囊泡单胺转运体(VMAT)所控制的。大量研究已经证明了VMAT作为各种神经病理状态药物治疗靶点的意义。靶定VMAT的众多药物往往充当抑制剂的作用,包括VMAT2抑制剂tetrabenazine被用于治疗亨廷顿疾病和其它运动障碍相关的运动功能障碍。
在化学上,deutetrabenazine正是tetrabenazine的衍生类似化合物,其中6个氢原子被氘原子代替。氘的掺入会降低药物代谢的速度,从而减少频率的给药。于是,作为tetrabenazine的重氢化形式,deutetrabenazine化学结构的改良使得药物安全性和有效性都得到了显著改观。
AUSTEDOTM治疗与亨廷顿舞蹈症相关的“舞蹈病症状”的疗效和安全性是在随机、双盲、安慰剂对照的多中心3期临床试验中进行评估的,该试验在90例明显展示与亨廷顿舞蹈症相关的“舞蹈病症状”的患者中进行。从基线到维护期(第9周和第12周的平均数据),接受AUSTEDOTM治疗患者的Total Maximal Chorea Scores评分指标提高约4.4个单位,而安慰剂组仅为约1.9个单位;这2.5单位的治疗效果具有统计学意义(p<0.0001)。
“Chorea是许多亨廷顿舞蹈症患者的主要症状。它影响患者的日常生活功能和活动,而且针对这些患者的治疗方案也很有限,“Teva全球研发总裁兼首席科学官Michael D. Hayden博士说道:“基于支持AUSTEDO临床获批的结果和我们持续致力于患者的临床开发计划,我们认为将该治疗选择推向前进是独一无二的。”
“在Teva,我们在慢性疾病领域建立全面的疾病管理计划已经有了悠久的历史,”Teva全球特殊药物总裁兼首席执行官Rob Koremans博士说道:“我们在与患者、护理伙伴和医疗专业人士建立合作关系方面拥有经验丰富的高素质团队。这一未满足的需求如此重大,带来的创新治疗方式也鼓舞人心。我们已经做好充分准备,将这一重要治疗方案提供给亨廷顿舞蹈症病患群体。”
参考资料:
[1] Teva Finally Wins FDA Approval for Potential Huntingtons Blockbuster Austedo
[2] Teva Announces FDA Approval of AUSTEDO™ (deutetrabenazine) Tablets for the Treatment of Chorea Associated with Huntington’s Disease
Teva Announces FDA Approval of AUSTEDO(TM) (deutetrabenazine) Tablets for the Treatment of Chorea Associated with Huntington’s Disease
U.S. Food and Drug Administration (FDA) has approved AUSTEDO™ (deutetrabenazine) tablets for the treatment of chorea associated with Huntington’s disease (HD). Previously referred to by the developmental name SD-809, AUSTEDOTM is the first deuterated product approved by the FDA and only the second product approved in HD. The product was previously granted Orphan Drug Designation by the FDA.
A rare and fatal neurodegenerative disorder, HD affects more than 35,000 people in the United States. Chorea – involuntary, random and sudden, twisting and/or writhing movements – is one of the most striking physical manifestations of this disease and occurs in approximately 90% of patients. “Chorea is a major symptom for many living with Huntington disease. It impacts patients’ functionality and activities of daily living, and there have been limited treatment options for these patients,” said Michael Hayden, M.D., Ph.D., President of Global R&D and Chief Scientific Officer at Teva. “Based on the results demonstrated in the clinical development program which supported the approval of AUSTEDO™ and our ongoing commitment to patients, we feel uniquely positioned to bring this treatment option forward.”
The FDA approval was based on results from a Phase III randomized, placebo-controlled study to assess the safety and efficacy of AUSTEDO™ in reducing chorea in patients with HD (First-HD).
“At Teva, we have a long history of establishing comprehensive disease m |