PMID- 30788385 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200929 IS - 2329-0501 (Print) IS - 2329-0501 (Electronic) IS - 2329-0501 (Linking) VI - 13 DP - 2019 Jun 14 TI - AAV9-TAZ Gene Replacement Ameliorates Cardiac TMT Proteomic Profiles in a Mouse Model of Barth Syndrome. PG - 167-179 LID - 10.1016/j.omtm.2019.01.007 [doi] AB - Barth syndrome (BTHS) is a rare mitochondrial disease that causes severe cardiomyopathy and has no disease-modifying therapy. It is caused by recessive mutations in the gene tafazzin (TAZ), which encodes tafazzin-an acyltransferase that remodels the inner mitochondrial membrane lipid cardiolipin. To identify novel mechanistic pathways involved in BTHS and evaluate the effects of gene therapy on proteomic profiles, we performed a multiplex tandem mass tagging (TMT) quantitative proteomics analysis to compare protein expression profiles from heart lysates isolated from BTHS, healthy wild-type (WT), and BTHS treated with adeno-associated virus serotype 9 (AAV9)-TAZ gene replacement as neonates or adults. 197 proteins with >/=2 unique peptides were identified. Of these, 91 proteins were significantly differentially expressed in BTHS compared to WT controls. Cause-effect relationships between tafazzin deficiency and altered protein profiles were confirmed through demonstrated significant improvements in expression levels following administration of AAV9-TAZ. The importance of TMEM65 in Cx43 localization to cardiac intercalated discs was revealed as a novel consequence of tafazzin deficiency that was improved following gene therapy. This study identifies novel mechanistic pathways involved in the pathophysiology of BTHS, demonstrates the ability of gene delivery to improve protein expression profiles, and provides support for clinical translation of AAV9-TAZ gene therapy. FAU - Suzuki-Hatano, Silveli AU - Suzuki-Hatano S AD - Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA. FAU - Saha, Madhurima AU - Saha M AD - Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA. FAU - Soustek, Meghan S AU - Soustek MS AD - Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA. AD - Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, FL 32610, USA. FAU - Kang, Peter B AU - Kang PB AD - Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA. AD - Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, FL 32610, USA. FAU - Byrne, Barry J AU - Byrne BJ AD - Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA. AD - Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, FL 32610, USA. FAU - Cade, W Todd AU - Cade WT AD - Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO 63110, USA. FAU - Pacak, Christina A AU - Pacak CA AD - Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA. AD - Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, FL 32610, USA. LA - eng GR - R01 HL107406/HL/NHLBI NIH HHS/United States GR - R01 HL136759/HL/NHLBI NIH HHS/United States PT - Journal Article DEP - 20190125 PL - United States TA - Mol Ther Methods Clin Dev JT - Molecular therapy. Methods & clinical development JID - 101624857 PMC - PMC6369239 OTO - NOTNLM OT - AAV9 OT - BTHS OT - Barth syndrome OT - Cx43 OT - TMEM65 OT - TMT proteomics OT - cardiac gene therapy OT - gap junction localization OT - mitochondrial disease OT - tafazzin EDAT- 2019/02/23 06:00 MHDA- 2019/02/23 06:01 PMCR- 2019/01/25 CRDT- 2019/02/22 06:00 PHST- 2018/08/24 00:00 [received] PHST- 2019/01/16 00:00 [accepted] PHST- 2019/02/22 06:00 [entrez] PHST- 2019/02/23 06:00 [pubmed] PHST- 2019/02/23 06:01 [medline] PHST- 2019/01/25 00:00 [pmc-release] AID - S2329-0501(19)30010-5 [pii] AID - 10.1016/j.omtm.2019.01.007 [doi] PST - epublish SO - Mol Ther Methods Clin Dev. 2019 Jan 25;13:167-179. doi: 10.1016/j.omtm.2019.01.007. eCollection 2019 Jun 14.