Treatment with bone maturation and average lifespan of HPP model mice by AAV8-mediated neonatal gene therapy via single muscle injection

被引:3
作者
Matsumoto, Tae [1 ,2 ]
Miyake, Koichi [1 ]
Miyake, Noriko [3 ]
Iijima, Osamu [3 ]
Adachi, Kumi [3 ]
Narisawa, Sonoko [4 ]
Millan, Jose Luis [4 ]
Orimo, Hideo [5 ]
Shimada, Takashi [3 ]
机构
[1] Nippon Med Sch, Grad Sch Med, Dept Gene Therapy, Bunkyo Ku, 1-1-5 Sendagi, Tokyo 1138602, Japan
[2] Nippon Med Sch, Dept Pediat, Bunkyo Ku, 1-1-5 Sendagi, Tokyo 1138603, Japan
[3] Nippon Med Sch, Dept Biochem & Mol Biol, Bunkyo Ku, 1-1-5 Sendagi, Tokyo 1138602, Japan
[4] Sanford Childrens Hlth Res Ctr, Sanford Burnham Prebys Med Discovery Inst, La Jolla, CA 92037 USA
[5] Nippon Med Sch, Grad Sch Med, Dept Metab & Nutr, Bunkyo Ku, 1-1-5 Sendagi, Tokyo 1138602, Japan
基金
美国国家卫生研究院;
关键词
ALKALINE-PHOSPHATASE GENE; RECOMBINANT ADENOASSOCIATED VIRUS; ENZYME REPLACEMENT THERAPY; INFANTILE HYPOPHOSPHATASIA; CELL TRANSPLANTATION; EXPRESSION;
D O I
10.1016/j.omtm.2021.06.006
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
Hypophosphatasia (HPP) is an inherited skeletal disease characterized by defective bone and tooth mineralization due to a deficiency in tissue-nonspecific alkaline phosphatase (TNALP). Patients with the severe infantile form of HPP may appear normal at birth, but their prognosis is very poor. To develop a practical gene therapy for HPP, we endeavored to phenotypically correct TNALP knockout (Akp2(-/-)) mice through adeno-associated virus type 8 (AAV8) vector-mediated, muscle-directed, TNALP expression. Following treatment of neonatal Akp2(-/-) mice with a single intramuscular injection of ARU-2801 (AAV8-TNALP-D10-vector) at 1.0 x 10(12) vector genomes/body, high plasma ALP levels (19.38 +/- 5.02 U/mL) were detected for up to 18 months, and computed tomography analysis showed mature bone mineralization. Histochemical staining for ALP activity in the knee joint revealed ALP activity on the surface of the endosteal bone of mice. Throughout their lives, the surviving treated Akp2(-/-) mice exhibited normal physical activity and a healthy appearance, whereas untreated controls died within 3 weeks. No ectopic calcification or abnormal calcium metabolism was detected in the treated mice. These findings suggest that ARU-2801-mediated neonatal intramuscular gene therapy is both safe and effective, and that this strategy could be a practical option for treatment of the severe infantile form of HPP.
引用
收藏
页码:330 / 337
页数:8
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