PMID- 22133046 OWN - NLM STAT- MEDLINE DCOM- 20130624 LR - 20220202 IS - 1557-7422 (Electronic) IS - 1043-0342 (Print) IS - 1043-0342 (Linking) VI - 23 IP - 4 DP - 2012 Apr TI - Successful gene therapy in utero for lethal murine hypophosphatasia. PG - 399-406 LID - 10.1089/hum.2011.148 [doi] AB - Hypophosphatasia (HPP), caused by mutations in the gene ALPL encoding tissue-nonspecific alkaline phosphatase (TNALP), is an inherited systemic skeletal disease characterized by mineralization defects of bones and teeth. The clinical severity of HPP varies widely, from a lethal perinatal form to mild odontohypophosphatasia showing only dental manifestations. HPP model mice (Akp2(-/-)) phenotypically mimic the severe infantile form of human HPP; they appear normal at birth but die by 2 weeks of age because of growth failure, hypomineralization, and epileptic seizures. In the present study, we investigated the feasibility of fetal gene therapy using the lethal HPP model mice. On day 15 of gestation, the fetuses of HPP model mice underwent transuterine intraperitoneal injection of adeno-associated virus serotype 9 (AAV9) expressing bone-targeted TNALP. Treated and delivered mice showed normal weight gain and seizure-free survival for at least 8 weeks. Vector sequence was detected in systemic organs including bone at 14 days of age. ALP activities in plasma and bone were consistently high. Enhanced mineralization was demonstrated on X-ray images of the chest and forepaw. Our data clearly demonstrate that systemic injection of AAV9 in utero is an effective strategy for the treatment of lethal HPP mice. Fetal gene therapy may be an important choice after prenatal diagnosis of life-threatening HPP. FAU - Sugano, Hanako AU - Sugano H AD - Department of Biochemistry and Molecular Biology, Nippon Medical School, Tokyo, 113-8602 Japan. FAU - Matsumoto, Tae AU - Matsumoto T FAU - Miyake, Koichi AU - Miyake K FAU - Watanabe, Atsushi AU - Watanabe A FAU - Iijima, Osamu AU - Iijima O FAU - Migita, Makoto AU - Migita M FAU - Narisawa, Sonoko AU - Narisawa S FAU - Millan, Jose Luis AU - Millan JL FAU - Fukunaga, Yoshitaka AU - Fukunaga Y FAU - Shimada, Takashi AU - Shimada T LA - eng GR - R01 DE012889/DE/NIDCR NIH HHS/United States GR - DE12889/DE/NIDCR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20120126 PL - United States TA - Hum Gene Ther JT - Human gene therapy JID - 9008950 RN - EC 3.1.3.1 (ALPL protein, mouse) RN - EC 3.1.3.1 (Alkaline Phosphatase) SB - IM MH - Alkaline Phosphatase/genetics MH - Animals MH - Disease Models, Animal MH - Feasibility Studies MH - Female MH - *Fetal Therapies MH - Genetic Therapy MH - Hypophosphatasia/genetics/*therapy MH - Mice MH - Pregnancy MH - Uterus PMC - PMC3327603 EDAT- 2011/12/03 06:00 MHDA- 2013/06/26 06:00 PMCR- 2013/04/01 CRDT- 2011/12/03 06:00 PHST- 2011/12/03 06:00 [entrez] PHST- 2011/12/03 06:00 [pubmed] PHST- 2013/06/26 06:00 [medline] PHST- 2013/04/01 00:00 [pmc-release] AID - 10.1089/hum.2011.148 [pii] AID - 10.1089/hum.2011.148 [doi] PST - ppublish SO - Hum Gene Ther. 2012 Apr;23(4):399-406. doi: 10.1089/hum.2011.148. Epub 2012 Jan 26.