FDA暂停了苯丙酮尿症(PKU)基因疗法BMN 307的I/II期临床试验

2022-02-19 Allan MedSci原创

在临床前试验中观察到致癌性(肝肿瘤)后,FDA 停止了在 PKU 成人中研究其 AAV5-苯丙氨酸羟化酶 (PAH) 基因治疗候选药物 BMN 307 的 I/II 期 PHEARLESS 试验。

苯丙酮尿症(PKU)是一种芳香族氨基酸(苯丙氨酸)疾病,由苯丙氨酸羟化酶(phenylalanine hydroxylase,PAH)缺乏导致,如不治疗会导致不可逆的智力障碍及其他临床症状。

图片来源:Harding C O. Molecular Frontiers Journal, 2019, 3(02): 110-121.

治疗方式为采用低苯丙氨酸的饮食及特殊补充剂,必须给婴儿患者服用特殊配方奶粉佐以少量母乳。在婴儿诞生后,必须尽快让其开始低苯丙氨酸的饮食,如果不能终生维持,至少需持续十年。如果严格执行饮食限制,早期诊断出此症的患者仍可以跟常人一般健康,寿命与常人无异。疗效需依定期接受血液检查来监测。

BioMarin Pharmaceutical 本周四披露,在临床前试验中观察到致癌性(肝肿瘤)后,FDA 停止了在 PKU 成人中研究其 AAV5-苯丙氨酸羟化酶 (PAH) 基因治疗候选药物 BMN 307 的 I/II 期 PHEARLESS 试验。该公司现在表示,FDA 希望看到更多非临床研究的数据,以评估基因疗法 BMN 307 的致癌风险。

BioMarin 全球研发总裁 Hank Fuchs 表示:“患者安全是我们的首要任务,我们预计卫生当局和开发人员都将寻求表征和评估潜在的安全信号,以对这些潜在风险进行更全面的评估”。

BioMarin 解释说,已经启动了一项临床前研究,以评估 BMN 307 在具有致癌突变的小鼠中的有效性。结果显示,虽然该研究中的 63 只动物中没有一只在 24 周时出现肿瘤,但以 2e14 vg/kg 的最高剂量给予 BMN 307 的 7 只小鼠中,有 6 只在给药后 52 周的肝脏尸检中出现了肿瘤,有证据表明部分整合 AAV 载体进入基因组。

 

原始出处:

https://firstwordpharma.com/story/5501729

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    2022-02-20 医者仁者

    #苯丙酮尿症##基因治疗#,看来基因治疗也不是一番风顺,仍然面临很多挑战与问题。短期来看,酶替代治疗,可能是一种临时的选择。

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ACMG年度临床遗传学会议上,基因药物公司Homology Medicines宣布临床前数据证明基因治疗候选药物HMI-102可以恢复正常的苯丙氨酸代谢途径,用于治疗苯丙酮尿症(PKU)具有巨大的潜力。

欧盟批准Palynziq用于治疗苯丙酮尿症成年患者

欧盟委员会已批准BioMarin的Palynziq(聚乙二醇化重组苯丙氨酸氨裂解酶pegvaliase注射剂)用于治疗16岁以上的苯丙酮尿症(PKU)患者。

Nat Metab:用于治疗苯丙酮尿症的工程化大肠杆菌菌株的安全性和药效学研究

苯丙酮尿症(PKU)是一种罕见的常染色体隐性代谢疾病,其由编码苯丙氨酸羟化酶的PAH基因中的双等位基因突变所引起的。

Neurology:苯丙氨酸对苯丙酮尿症患者脑功能的影响

该研究为苯丙氨酸水平与苯丙酮尿症患者的临床、神经心理学、神经生理学、生化和影像学改变之间存在相关性提供了有力证据。

专题:2.28国际罕见病日十周年:罕见病指南合集

2017年2月28日是第十届国际罕见病日,今年的主题是“研究”,正引导人类识别未知疾病,增加对疾病的理解,导向对新的创新疗法甚至治愈方法的开发。在中国较为人熟知的罕见疾病包括:苯丙酮尿症、地中海贫血、成骨不全症、脊髓小脑性共济失调等。下面是近些年关于这些罕见病的指南:  1、苯丙酮尿症(PKU)  在我国发病率为1/16500,是一种先天性遗传代谢病,表现为智能低下,惊厥发

拓展阅读

苯丙酮尿症患者总胆碱摄入量与工作记忆表现间的关联

临床监测胆碱摄入量对所有PKU患者都是必要的,且对代谢控制良好的患者的工作记忆功能可能具有重要意义。

World J Pediatr:中国基于测序的新生儿单基因遗传病二代测序筛查的多中心前瞻性研究

下一代测序(NGS)技术的发展为扩展当前的新生儿筛查方法提供了新的机会。

近亲结婚?表兄妹结婚41年想离婚得知婚姻无效

据@泾渭视频 报道:近日,陕西安康。大爷和李大妈于1981年7月登记结婚,现子女均已成家。在长期相处过程中,张大爷经常对李大妈口出恶言,使李大妈无法忍受。

苯丙酮尿症:症状与体征、病因、流行病学、诊断和治疗

苯丙酮尿症(phenylketonuria,PKU)是一种常见的氨基酸代谢病,是由于苯丙氨酸(PA)代谢途径中的酶缺陷,使得苯丙氨酸不能转变成为酪氨酸,导致苯丙氨酸及其酮酸蓄积,并从尿中大量排出。本病

Nat Metab:用于治疗苯丙酮尿症的工程化大肠杆菌菌株的安全性和药效学研究

苯丙酮尿症(PKU)是一种罕见的常染色体隐性代谢疾病,其由编码苯丙氨酸羟化酶的PAH基因中的双等位基因突变所引起的。

Neurology:苯丙氨酸对苯丙酮尿症患者脑功能的影响

该研究为苯丙氨酸水平与苯丙酮尿症患者的临床、神经心理学、神经生理学、生化和影像学改变之间存在相关性提供了有力证据。