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Adu-Agyeiwaah Y, Vieira CP, Asare-Bediako B, Li Calzi S, DuPont M, Floyd J, Boye S, Chiodo V, Busik JV, Grant MB. Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes. Transl Vis Sci Technol 2023; 12:20. [PMID: 37070938 PMCID: PMC10123324 DOI: 10.1167/tvst.12.4.20] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 02/24/2023] [Indexed: 04/19/2023] Open
Abstract
Purpose The expression of silent information regulator (SIRT) 1 is reduced in diabetic retinopathy (DR). Previous studies showed that alterations in SIRT1 messenger RNA (mRNA) and protein expression are implicated in progressive inflammation and formation of retinal acellular capillaries. Treatment with the SIRT1 agonist, SRT1720, improved visual response by restoration of a- and b-wave responses on electroretinogram scotopic measurements in diabetic (db/db) mice. In this study, we investigated the effects of intravitreal SIRT1 delivery on diabetic retinal pathology. Methods Nine-month-old db/db mice received one intravitreal injection of either AAV2-SIRT1 or AAV2-GFP control virus, and after 3 months, electroretinography and optomotor responses were measured. Their eyes were then removed and analyzed by immunohistochemistry and flow cytometry. Results SIRT1 mRNA and protein levels were increased following AAV2-SIRT1 administration compared to control virus AAV2-GFP injected mice. IBA1+ and caspase 3 expression were decreased in retinas of db/db mice injected with AAV2-SIRT1, and reductions in scotopic a- and b-waves and high spatial frequency in optokinetic response were prevented. Retinal hypoxia inducible factor 1α (HIF-1α) protein levels were reduced in the AAV2-SIRT1-injected mice compared to control-injected mice. Using flow cytometry to assess changes in intracellular HIF-1α levels, endothelial cells (CD31+) from AAV-2 SIRT1 injected mice demonstrated reduced HIF-1α expression compared to db/db mice injected with the control virus. Conclusions Intravitreal AAV2-SIRT1 delivery increased retina SIRT1 and transduced neural and endothelial cells, thus reversing functional damage and improving overall visual function. Translational Relevance AAV2-SIRT1 gene therapy represents a beneficial approach for the treatment of chronic retinal conditions such as DR.
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Affiliation(s)
- Yvonne Adu-Agyeiwaah
- Department of Vision Science, School of Optometry, The University of Alabama at Birmingham, Birmingham, AL, USA
- Department of Ophthalmology and Visual Sciences, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Cristiano P. Vieira
- Department of Ophthalmology and Visual Sciences, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Bright Asare-Bediako
- Department of Vision Science, School of Optometry, The University of Alabama at Birmingham, Birmingham, AL, USA
- Department of Ophthalmology and Visual Sciences, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Sergio Li Calzi
- Department of Ophthalmology and Visual Sciences, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Mariana DuPont
- Department of Vision Science, School of Optometry, The University of Alabama at Birmingham, Birmingham, AL, USA
- Department of Ophthalmology and Visual Sciences, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jason Floyd
- Department of Ophthalmology and Visual Sciences, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Sanford Boye
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Vince Chiodo
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Julia V. Busik
- Department of Physiology, Michigan State University, East Lansing, MI, USA
| | - Maria B. Grant
- Department of Ophthalmology and Visual Sciences, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA
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Lani-Louzada R, Marra C, Dias MS, de Araújo VG, Abreu CA, Ribas VT, Adesse D, Allodi S, Chiodo V, Hauswirth W, Petrs-Silva H, Linden R. Neuroprotective Gene Therapy by Overexpression of the Transcription Factor MAX in Rat Models of Glaucomatous Neurodegeneration. Invest Ophthalmol Vis Sci 2022; 63:5. [PMID: 35103748 PMCID: PMC8819487 DOI: 10.1167/iovs.63.2.5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Purpose Based on our preview evidence that reduced nuclear content of the transcription factor Myc-associated protein X (MAX) is an early event associated with degeneration of retinal ganglion cells (RGCs), in the present study, our purpose was to test whether the overexpression of human MAX had a neuroprotective effect against RGC injury. Methods Overexpression of either MAX or green fluorescent protein (GFP) in the retina was achieved by intravitreal injections of recombinant adenovirus-associated viruses (rAAVs). Lister Hooded rats were used in three models of RGC degeneration: (1) cultures of retinal explants for 30 hours ex vivo from the eyes of 14-day-old rats that had received intravitreal injections of rAAV2-MAX or the control vector rAAV2-GFP at birth; (2) an optic nerve crush model, in which 1-month-old rats received intravitreal injection of either rAAV2-MAX or rAAV2-GFP and, 4 weeks later, were operated on; and (3) an ocular hypertension (OHT) glaucoma model, in which 1-month-old rats received intravitreal injection of either rAAV2-MAX or rAAV2-GFP and, 4 weeks later, were subject to cauterization of the limbal plexus. Cell death was estimated by detection of pyknotic nuclei and TUNEL technique and correlated with MAX immunocontent in an ex vivo model of retinal explants. MAX expression was detected by quantitative RT-PCR. In the OHT model, survival of RGCs was quantified by retrograde labeling with DiI or immunostaining for BRN3a at 14 days after in vivo injury. Functional integrity of RGCs was analyzed through pattern electroretinography, and damage to the optic nerve was examined in semithin sections. Results In all three models of RGC insult, gene therapy by overexpression of MAX prevented RGC death. Also, ON degeneration and electrophysiologic deficits were prevented in the OHT model. Conclusions Our experiments offer proof of concept for a novel neuroprotective gene therapy for glaucomatous neurodegeneration based on overexpression of MAX.
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Affiliation(s)
- Rafael Lani-Louzada
- Laboratory of Neurogenesis, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Camila Marra
- Laboratory of Neurogenesis, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mariana Santana Dias
- Laboratory of Neurogenesis, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Victor Guedes de Araújo
- Laboratory of Neurogenesis, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carla Andreia Abreu
- Laboratory of Neurogenesis, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vinícius Toledo Ribas
- Laboratory of Neurobiology, Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Daniel Adesse
- Laboratory of Structural Biology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
| | - Silvana Allodi
- Laboratory of Comparative and Developmental Neurobiology, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vince Chiodo
- Department of Ophthalmology, University of Florida, Gainesville, Florida, United States
| | - William Hauswirth
- Department of Ophthalmology, University of Florida, Gainesville, Florida, United States
| | - Hilda Petrs-Silva
- Laboratory of Neurogenesis, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rafael Linden
- Laboratory of Neurogenesis, Carlos Chagas Filho Institute of Biophysics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Bosco A, Anderson S, Breen K, Romero C, Steele M, Chiodo V, Boyle S, Hauswirth W, Tomlinson S, Vetter M. C3-targeted retinal gene therapy limits neurodegeneration onset and progression in age-related mouse glaucoma. Mol Immunol 2018. [DOI: 10.1016/j.molimm.2018.06.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Petersen-Jones SM, Occelli LM, Winkler PA, Lee W, Sparrow JR, Tsukikawa M, Boye SL, Chiodo V, Capasso JE, Becirovic E, Schön C, Seeliger MW, Levin AV, Michalakis S, Hauswirth WW, Tsang SH. Patients and animal models of CNGβ1-deficient retinitis pigmentosa support gene augmentation approach. J Clin Invest 2017; 128:190-206. [PMID: 29202463 PMCID: PMC5749539 DOI: 10.1172/jci95161] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 10/10/2017] [Indexed: 01/07/2023] Open
Abstract
Retinitis pigmentosa (RP) is a major cause of blindness that affects 1.5 million people worldwide. Mutations in cyclic nucleotide-gated channel β 1 (CNGB1) cause approximately 4% of autosomal recessive RP. Gene augmentation therapy shows promise for treating inherited retinal degenerations; however, relevant animal models and biomarkers of progression in patients with RP are needed to assess therapeutic outcomes. Here, we evaluated RP patients with CNGB1 mutations for potential biomarkers of progression and compared human phenotypes with those of mouse and dog models of the disease. Additionally, we used gene augmentation therapy in a CNGβ1-deficient dog model to evaluate potential translation to patients. CNGB1-deficient RP patients and mouse and dog models had a similar phenotype characterized by early loss of rod function and slow rod photoreceptor loss with a secondary decline in cone function. Advanced imaging showed promise for evaluating RP progression in human patients, and gene augmentation using adeno-associated virus vectors robustly sustained the rescue of rod function and preserved retinal structure in the dog model. Together, our results reveal an early loss of rod function in CNGB1-deficient patients and a wide window for therapeutic intervention. Moreover, the identification of potential biomarkers of outcome measures, availability of relevant animal models, and robust functional rescue from gene augmentation therapy support future work to move CNGB1-RP therapies toward clinical trials.
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Affiliation(s)
- Simon M Petersen-Jones
- Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, Michigan, USA
| | - Laurence M Occelli
- Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, Michigan, USA
| | - Paige A Winkler
- Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, Michigan, USA
| | - Winston Lee
- Department of Ophthalmology Pathology & Cell Biology, College of Physicians and Surgeons, Columbia University, New York, New York, USA
| | - Janet R Sparrow
- Department of Ophthalmology Pathology & Cell Biology, College of Physicians and Surgeons, Columbia University, New York, New York, USA
| | - Mai Tsukikawa
- Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Sanford L Boye
- Department of Ophthalmology, University of Florida, Gainesville, Florida, USA
| | - Vince Chiodo
- Department of Ophthalmology, University of Florida, Gainesville, Florida, USA
| | - Jenina E Capasso
- Ocular Genetics, Wills Eye Hospital (WEH), Philadelphia, Pennsylvania, USA
| | - Elvir Becirovic
- Center for Integrated Protein Science Munich (CIPSM), Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christian Schön
- Center for Integrated Protein Science Munich (CIPSM), Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Mathias W Seeliger
- Division of Ocular Neurodegeneration, Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Alex V Levin
- Thomas Jefferson University, Philadelphia, Pennsylvania, USA.,Ocular Genetics, Wills Eye Hospital (WEH), Philadelphia, Pennsylvania, USA
| | - Stylianos Michalakis
- Center for Integrated Protein Science Munich (CIPSM), Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians-Universität München, Munich, Germany
| | - William W Hauswirth
- Department of Ophthalmology, University of Florida, Gainesville, Florida, USA
| | - Stephen H Tsang
- Department of Ophthalmology Pathology & Cell Biology, College of Physicians and Surgeons, Columbia University, New York, New York, USA.,Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, New York, USA.,Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University Medical Center (CUMC), Edward S. Harkness Eye Institute, New York, New York, USA
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Vetter M, Bosco A, Anderson S, Breen K, Romero C, Steele M, Chiodo V, Boye S, Hauswirth W, Tomlinson S. Contribution of microglia and complement activation to glaucoma progression. Acta Ophthalmol 2017. [DOI: 10.1111/j.1755-3768.2017.03621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- M. Vetter
- Department of Neurobiology and Anatomy; University of Utah; Salt Lake City UT United States
| | - A. Bosco
- Department of Neurobiology and Anatomy; University of Utah; Salt Lake City UT United States
| | - S. Anderson
- Department of Neurobiology and Anatomy; University of Utah; Salt Lake City UT United States
| | - K. Breen
- Department of Neurobiology and Anatomy; University of Utah; Salt Lake City UT United States
| | - C. Romero
- Department of Neurobiology and Anatomy; University of Utah; Salt Lake City UT United States
| | - M. Steele
- Department of Neurobiology and Anatomy; University of Utah; Salt Lake City UT United States
| | - V. Chiodo
- Department of Ophthalmology; University of Florida; Gainesville FL United States
| | - S. Boye
- Department of Ophthalmology; University of Florida; Gainesville FL United States
| | - W. Hauswirth
- Department of Ophthalmology; University of Florida; Gainesville FL United States
| | - S. Tomlinson
- Department of Microbiology& Immunology; Medical University of South Carolina; Charleston SC United States
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Cabral-Miranda F, Nicoloso-Simões E, Adão-Novaes J, Chiodo V, Hauswirth WW, Linden R, Chiarini LB, Petrs-Silva H. rAAV8-733-Mediated Gene Transfer of CHIP/Stub-1 Prevents Hippocampal Neuronal Death in Experimental Brain Ischemia. Mol Ther 2016; 25:392-400. [PMID: 28153090 DOI: 10.1016/j.ymthe.2016.11.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 11/07/2016] [Accepted: 11/27/2016] [Indexed: 12/15/2022] Open
Abstract
Brain ischemia is a major cause of adult disability and death, and it represents a worldwide health problem with significant economic burden for modern society. The identification of the molecular pathways activated after brain ischemia, together with efficient technologies of gene delivery to the CNS, may lead to novel treatments based on gene therapy. Recombinant adeno-associated virus (rAAV) is an effective platform for gene transfer to the CNS. Here, we used a serotype 8 rAAV bearing the Y733F mutation (rAAV8-733) to overexpress co-chaperone E3 ligase CHIP (also known as Stub-1) in rat hippocampal neurons, both in an oxygen and glucose deprivation model in vitro and in a four-vessel occlusion model of ischemia in vivo. We show that CHIP overexpression prevented neuronal degeneration in both cases and led to a decrease of both eIF2α (serine 51) and AKT (serine 473) phosphorylation, as well as reduced amounts of ubiquitinated proteins following hypoxia or ischemia. These data add to current knowledge of ischemia-related signaling in the brain and suggest that gene therapy based on the role of CHIP in proteostasis may provide a new venue for brain ischemia treatment.
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Affiliation(s)
- Felipe Cabral-Miranda
- Departamento de Neurobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - Elisa Nicoloso-Simões
- Departamento de Neurobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - Juliana Adão-Novaes
- Departamento de Neurobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - Vince Chiodo
- Retinal Gene Therapy Group, Department of Ophthalmology, University of Florida, Gainesville, FL 32611, USA
| | - William W Hauswirth
- Retinal Gene Therapy Group, Department of Ophthalmology, University of Florida, Gainesville, FL 32611, USA
| | - Rafael Linden
- Departamento de Neurobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - Luciana Barreto Chiarini
- Departamento de Neurobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - Hilda Petrs-Silva
- Departamento de Neurobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil.
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Dinculescu A, Min SH, Dyka FM, Deng WT, Stupay RM, Chiodo V, Smith WC, Hauswirth WW. Pathological Effects of Mutant C1QTNF5 (S163R) Expression in Murine Retinal Pigment Epithelium. Invest Ophthalmol Vis Sci 2016; 56:6971-80. [PMID: 26513502 DOI: 10.1167/iovs.15-17166] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE The mutation S163R in complement C1q tumor necrosis factor-related protein-5 (C1QTNF5) causes an autosomal dominant disorder known as late-onset retinal degeneration (L-ORD). In this study, our goal is to evaluate the consequences of mutant S163R C1QTNF5 expression in mouse RPE following its delivery using an adeno-associated viral (AAV) vector. METHODS We generated AAV vectors containing either human wild-type C1QTNF5 or mutant S163R C1QTNF5 driven by an RPE-specific BEST1 promoter, and delivered them subretinally into one eye of adult C57BL/6 mice. Transgene expression was detected by immunohistochemistry. Retinal function was assessed by full-field ERG. Pathological changes were further examined by digital fundus imaging and spectral-domain optical coherence tomography (SD-OCT). RESULTS We show that the AAV-expressed mutant S163R leads to pathological effects similar to some of those found in patients with advanced L-ORD, including RPE thinning, RPE cell loss, and retinal degeneration. In addition, we provide in vivo evidence that mutant S163R C1QTNF5 can form large, transparent, spherical intracellular aggregates throughout the RPE, which are detectable by light microscopy. In contrast to AAV-expressed wild-type C1QTNF5, which is secreted apically from the RPE toward the photoreceptor cells and the outer limiting membrane, the S163R mutant is primarily routed toward the basal side of RPE, where it forms thick, extracellular deposits over time. CONCLUSIONS Adeno-associated viral-targeted expression of mutant S163R in the RPE represents a useful approach for quickly generating animal models that mimic pathological features of L-ORD and offers the potential to understand disease mechanisms and develop therapeutic strategies.
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Abstract
PURPOSE Idiopathic juvenile osteoporosis (IJO) is a rare condition in children, characterized by bone pain and long bone and vertebral fractures. Previously, IJO bone was solely characterized by histomorphometry and quantitative computed tomography. The goal of this study is to describe IJO bone composition. MATERIALS AND METHODS Fourier transform infrared imaging (FTIRI), a vibrational spectroscopic technique providing spatially resolved images of chemical composition, was used to determine whether iliac crest biopsies from children with IJO differed in composition from and age- and sex-matched controls, and, as a secondary analysis, whether IJO bone showed the same disease dependent change in composition as do iliac crest bone biopsies from women with post-menopausal osteoporosis (PMO). Wilcoxon rank tests and linear regressions were used to analyze FTIRI variables (mineral-to-matrix ratio, carbonate-to-phosphate ratio, crystallinity, acid phosphate substitution, collagen maturity) and their individual pixel distributions (heterogeneity). RESULTS Mineral-to-matrix ratio was comparable in IJO and age-matched controls. Contrastingly, collagen maturity (also known as collagen cross-link ratio) was higher in cortical and cancellous IJO bone compared with juvenile controls. Acid phosphate substitution was greater in IJO cancellous bone than in age-matched controls, suggesting IJO bone mineral is formed more recently, reflecting a slower mineralization process. This agrees with findings of increased heterogeneity for mineral-to-matrix and collagen maturity ratios in IJO cancellous bone. There were negative correlations between cancellous collagen maturity and previously reported histomorphometric bone formation markers. There were no correlations with indices of remodeling. CONCLUSIONS IJO bone, similar to PMO bone, had elevated collagen maturity relative to its age-matched controls. This emphasizes the importance of the collagen matrix for bone health. IJO bone differed from PMO bone as IJO bone contains more recently formed mineral than age-matched controls but has a more mature matrix, whereas in PMO bone both mineral and matrix have older characteristics.
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Affiliation(s)
- IJ Garcia
- Mineralized Tissue Laboratory, Hospital for Special Surgery, 535 East 70 Street, New York, NY, 10021, USA
| | - V Chiodo
- Mineralized Tissue Laboratory, Hospital for Special Surgery, 535 East 70 Street, New York, NY, 10021, USA
| | - Y Ma
- Department of Epidemiology and Biostatistics, Milken Institute School of Public Health, The George Washington University, Washington, DC
| | - AL Boskey
- Mineralized Tissue Laboratory, Hospital for Special Surgery, 535 East 70 Street, New York, NY, 10021, USA
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Koilkonda RD, Hauswirth WW, Chiodo V, Boye SL, Gonzalez P, Guy J. 608. Evaluation of Pre-Existing Neutralizing Antibodies Against Tyrosine-Mutant AAV2 in Leber Hereditary Optic Neuropathy (LHON) Patients. Mol Ther 2015. [DOI: 10.1016/s1525-0016(16)34217-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Talla V, Koilkonda R, Porciatti V, Chiodo V, Boye SL, Hauswirth WW, Guy J. Complex I subunit gene therapy with NDUFA6 ameliorates neurodegeneration in EAE. Invest Ophthalmol Vis Sci 2015; 56:1129-40. [PMID: 25613946 DOI: 10.1167/iovs.14-15950] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To address the permanent disability induced by mitochondrial dysfunction in experimental autoimmune encephalomyelitis (EAE). METHODS Mice sensitized for EAE were rescued by intravitreal injection of adeno-associated viral vector serotype 2 with the complex I subunit gene scAAV-NDUFA6Flag. Controls were injected with a mitochondrially targeted red fluorescent protein (scAAV-COX8-cherry). Another group received scAAV-COX8-cherry, but was not sensitized for EAE. Serial pattern electroretinograms (PERGs) and optical coherent tomography (OCT) evaluated visual function and structure of the retina at 1, 3, and 6 months post injection (MPI). Treated mice were killed 6 MPI for histopathology. Immunodetection of cleaved caspase 3 gauged apoptosis. Complex I activity was assessed spectrophotometrically. Expression of NDUFA6Flag in the retina and optic nerve were evaluated between 1 week to 1 month post injection by RT-PCR, immunofluorescence and immunoblotting. RESULTS Reverse transcription-PCR and immunoblotting confirmed NDUFA6Flag overexpression with immunoprecipitation and blue native PAGE showing integration into murine complex I. Overexpression of NDUFA6Flag in the visual system of EAE mice rescued retinal complex I activity completely, axonal loss by 73%, and retinal ganglion cell (RGC) loss by 88%, RGC apoptosis by 66%, and restored the 33% loss of complex I activity in EAE to normal levels; thereby, preventing loss of vision indicated by the 43% reduction in the PERG amplitudes of EAE mice. CONCLUSIONS NDUFA6 gene therapy provided long-term suppression of neurodegeneration in the EAE animal model suggesting that it may also ameliorate the mitochondrial dysfunction associated with permanent disability in optic neuritis and MS patients.
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Affiliation(s)
- Venu Talla
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Rajeshwari Koilkonda
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Vittorio Porciatti
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Vince Chiodo
- Departments of Ophthalmology, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - Sanford L Boye
- Departments of Ophthalmology, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - William W Hauswirth
- Departments of Ophthalmology, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - John Guy
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
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Koilkonda R, Yu H, Talla V, Porciatti V, Feuer WJ, Hauswirth WW, Chiodo V, Erger KE, Boye SL, Lewin AS, Conlon TJ, Renner L, Neuringer M, Detrisac C, Guy J. LHON gene therapy vector prevents visual loss and optic neuropathy induced by G11778A mutant mitochondrial DNA: biodistribution and toxicology profile. Invest Ophthalmol Vis Sci 2014; 55:7739-53. [PMID: 25342621 DOI: 10.1167/iovs.14-15388] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
PURPOSE To demonstrate safety and efficacy of allotopic human ND4 for treatment of a Leber's hereditary optic neuropathy (LHON) mouse model harboring the G11778A mitochondrial mutation. METHODS We induced LHON in mice by intravitreal injection of mutant (G11778A) human ND4 DNA, responsible for most cases of LHON, that was directed to mitochondria using an AAV2 vector to which we appended a mitochondrial targeting sequence to the VP2 capsid. We then attempted rescue of visual loss using our test article (ScAAV2-P1ND4v2) containing a synthetic nuclear encoded G11778G ND4 gene that was allotopically expressed. Control mice either were uninjected or received AAV2-GFP or AAV2-mCherry. We performed RT-PCR and confocal microscopy at 2 weeks post injection. Pattern electroretinograms (PERGs), spectral-domain optical coherence tomography (SD-OCT), histology, and transmission electron microscopy (TEM) were performed. For toxicology and biodistribution studies, the test article was administered intravitreally to rats and rhesus macaques at different doses. RESULTS Mutant and wild-type ND4 were efficiently expressed in the mitochondria of retinal ganglion cells (RGCs). Visual function assessed by serial PERGs and retinal structure by serial SD-OCT showed a significant rescue by the test article. Histology and ultrastructural analysis confirmed that loss of RGCs and demise of axons was prevented by ScAAV2-P1ND4v2. Rat and nonhuman primate biodistribution studies showed that vector spread outside the injected eye into spleen and lymph nodes was minimal. Histopathology of tissues and organs including the eyes was comparable to that of uninfected and saline-injected eyes. CONCLUSIONS Allotopically expressed wild-type ND4 prevents the phenotype induced by G11778A mitochondrial DNA with a toxicology profile acceptable for testing in a phase I clinical trial.
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Affiliation(s)
- Rajeshwari Koilkonda
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Hong Yu
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Venu Talla
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Vittorio Porciatti
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - William J Feuer
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - William W Hauswirth
- Department of Ophthalmology, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - Vince Chiodo
- Department of Ophthalmology, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - Kirsten E Erger
- Department of Pediatrics, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - Sanford L Boye
- Department of Ophthalmology, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - Alfred S Lewin
- Department of Molecular Genetics and Microbiology, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - Thomas J Conlon
- Department of Pediatrics, University of Florida, College of Medicine, Gainesville, Florida, United States
| | - Lauren Renner
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon, United States
| | - Martha Neuringer
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon, United States
| | - Carol Detrisac
- Charles River Pathology Associates-Illinois, Chicago, Illinois, United States
| | - John Guy
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States
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Talla V, Porciatti V, Chiodo V, Boye SL, Hauswirth WW, Guy J. Gene therapy with mitochondrial heat shock protein 70 suppresses visual loss and optic atrophy in experimental autoimmune encephalomyelitis. Invest Ophthalmol Vis Sci 2014; 55:5214-26. [PMID: 25015358 DOI: 10.1167/iovs.14-14688] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
PURPOSE To rescue visual loss and optic neuropathy in experimental autoimmune encephalomyelitis (EAE). METHODS Encephalomyelitis was induced in mice that received intravitreal injections of AAV2-mtHSP70Flag or AAV2-Cox8-mCherry. Additional mice were injected with AAV2-Cox8-mCherry, but not sensitized for EAE. Visual function was assessed by pattern electroretinograms (PERG) at 1, 3, and 6 months post injection (MPI). Optical coherence tomography (OCT) evaluated the thickness of the inner plexiform layer + nerve fiber layers at 1, 3, and 6 MPI. Retinas and optic nerves (ONs) of mice euthanized 6 MPI were processed for light and electron microscopy. Expression of mtHSP70Flag in the retina and ONs was evaluated by RT-PCR, immunofluorescence, and Western blotting. The activities of respiratory complexes I and III, as well as mitochondrial protein import were quantitated. RESULTS Expression: immunofluorescence revealed punctate and perinuclear expression of mtHSP70Flag that colocalized with mitochondrial porin in thy1.2 labeled retinal ganglion cells (RGCs). Immunoblotting and RT-PCR confirmed mtHSP70Flag expression in the retina and ON. Rescue: treatment with mtHSP70Flag resulted in a 44% increase in PERG amplitude and less delays in latency relative to the EAE-mCherry group that also showed progressive inner retinal thinning. At 6 MPI, the almost 50% loss of RGCs and optic nerve axons in EAE mice was suppressed by mtHSP70Flag. In addition, retinas of EAE-mtHSP70Flag mice showed nearly complete rescue of complex I and III activities that was reduced by one-third in the EAE-mCherry retinas. Lastly, reductions in import of COX8-mCherry into mitochondria of mice sensitized for EAE improved by 30% with mtHSP70Flag gene therapy. CONCLUSIONS Mitochondrial HSP70 ameliorates mitochondrial dysfunction that culminates in irreversible visual loss and atrophy of the optic nerve in EAE suggesting that it may be useful to prevent irreversible disability in patients with optic neuritis and multiple sclerosis (MS).
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Affiliation(s)
- Venu Talla
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Vittorio Porciatti
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, Miller School of Medicine, Miami, Florida, United States
| | - Vince Chiodo
- Department of Ophthalmology, University of Florida, Gainesville, Florida, United States
| | - Sanford L Boye
- Department of Ophthalmology, University of Florida, Gainesville, Florida, United States
| | - William W Hauswirth
- Department of Ophthalmology, University of Florida, Gainesville, Florida, United States
| | - John Guy
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, Miller School of Medicine, Miami, Florida, United States
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Koilkonda RD, Yu H, Chou TH, Feuer WJ, Ruggeri M, Porciatti V, Tse D, Hauswirth WW, Chiodo V, Boye SL, Lewin AS, Neuringer M, Renner L, Guy J. Safety and effects of the vector for the Leber hereditary optic neuropathy gene therapy clinical trial. JAMA Ophthalmol 2014; 132:409-20. [PMID: 24457989 DOI: 10.1001/jamaophthalmol.2013.7630] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
IMPORTANCE We developed a novel strategy for treatment of Leber hereditary optic neuropathy (LHON) caused by a mutation in the nicotinamide adenine dinucleotide dehydrogenase subunit IV (ND4) mitochondrial gene. OBJECTIVE To demonstrate the safety and effects of the gene therapy vector to be used in a proposed gene therapy clinical trial. DESIGN AND SETTING In a series of laboratory experiments, we modified the mitochondrial ND4 subunit of complex I in the nuclear genetic code for import into mitochondria. The protein was targeted into the organelle by agency of a targeting sequence (allotopic expression). The gene was packaged into adeno-associated viral vectors and then vitreally injected into rodent, nonhuman primate, and ex vivo human eyes that underwent testing for expression and integration by immunohistochemical analysis and blue native polyacrylamide gel electrophoresis. During serial follow-up, the animal eyes underwent fundus photography, optical coherence tomography, and multifocal or pattern electroretinography. We tested for rescue of visual loss in rodent eyes also injected with a mutant G11778A ND4 homologue responsible for most cases of LHON. EXPOSURE Ocular infection with recombinant adeno-associated viral vectors containing a wild-type allotopic human ND4 gene. MAIN OUTCOMES AND MEASURES Expression of human ND4 and rescue of optic neuropathy induced by mutant human ND4. RESULTS We found human ND4 expressed in almost all mouse retinal ganglion cells by 1 week after injection and ND4 integrated into the mouse complex I. In rodent eyes also injected with a mutant allotopic ND4, wild-type allotopic ND4 prevented defective adenosine triphosphate synthesis, suppressed visual loss, reduced apoptosis of retinal ganglion cells, and prevented demise of axons in the optic nerve. Injection of ND4 in the ex vivo human eye resulted in expression in most retinal ganglion cells. Primates undergoing vitreal injection with the ND4 test article and followed up for 3 months had no serious adverse reactions. CONCLUSIONS AND RELEVANCE Expression of our allotopic ND4 vector in the ex vivo human eye, safety of the test article, rescue of the LHON mouse model, and the severe irreversible loss of visual function in LHON support clinical testing with mutated G11778A mitochondrial DNA in our patients.
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Affiliation(s)
- Rajeshwari D Koilkonda
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - Hong Yu
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - Tsung-Han Chou
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - William J Feuer
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - Marco Ruggeri
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - Vittorio Porciatti
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - David Tse
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
| | - William W Hauswirth
- Department of Ophthalmology, College of Medicine, University of Florida, Gainesville
| | - Vince Chiodo
- Department of Ophthalmology, College of Medicine, University of Florida, Gainesville
| | - Sanford L Boye
- Department of Ophthalmology, College of Medicine, University of Florida, Gainesville
| | - Alfred S Lewin
- Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville
| | - Martha Neuringer
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Lauren Renner
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - John Guy
- Bascom Palmer Eye Institute, Miller School of Medicine, University of Miami, Miami, Florida
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Chen MJ, Lu Y, Hamazaki T, Tsai HY, Erger K, Conlon T, Elshikha AS, Li H, Srivastava A, Yao C, Brantly M, Chiodo V, Hauswirth W, Terada N, Song S. Reprogramming adipose tissue-derived mesenchymal stem cells into pluripotent stem cells by a mutant adeno-associated viral vector. Hum Gene Ther Methods 2013; 25:72-82. [PMID: 24191859 DOI: 10.1089/hgtb.2013.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Induced pluripotent stem (iPS) cells have great potential for personalized regenerative medicine. Although several different methods for generating iPS cells have been reported, improvement of safety and efficiency is imperative. In this study, we tested the feasibility of using a triple tyrosine mutant AAV2 (Y444+500+730F) vector, designated AAV2.3m, to generate iPS cells. We developed a polycistronic rAAV2.3m vector expressing three reprogramming factors, Klf4, Oct4, and Sox2, and then used this vector to infect mouse adipose-derived mesenchymal stem cells (AT-MSCs) to induce the generation of iPS cells. We demonstrated that (1) the triple tyrosine mutant AAV2 vector is able to reprogram mouse adult adipose tissue-derived stem cells into the pluripotent state. Those rAAV2.3m-derived iPS (rAAV2.3m-iPS) cells express endogenous pluripotency-associated genes including Oct4, Sox2, and SSEA-1, and form teratomas containing multiple tissues in vivo; (2) c-myc, an oncogene, is dispensable in rAAV2.3m-mediated cellular reprogramming; and (3) transgene expression is undetectable after reprogramming, whereas vector DNA is detectable, indicating that transgenes are silenced. These results indicated the rAAV vector may have some advantages in generating iPS cells.
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Affiliation(s)
- Mong-Jen Chen
- 1 Department of Pharmaceutics, University of Florida , Gainesville, FL 32610
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Yu H, Ozdemir SS, Koilkonda RD, Chou TH, Porciatti V, Chiodo V, Boye SL, Hauswirth WW, Lewin AS, Guy J. Mutant NADH dehydrogenase subunit 4 gene delivery to mitochondria by targeting sequence-modified adeno-associated virus induces visual loss and optic atrophy in mice. Mol Vis 2012; 18:1668-83. [PMID: 22773905 PMCID: PMC3388991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 06/17/2012] [Indexed: 11/13/2022] Open
Abstract
PURPOSE Although mutated G11778A NADH ubiquinone oxidoreductase subunit 4 (ND4) mitochondrial DNA (mtDNA) is firmly linked to the blindness of Leber hereditary optic neuropathy (LHON), a bona fide animal model system with mutated mtDNA complex I subunits that would enable probing the pathogenesis of optic neuropathy and testing potential avenues for therapy has yet to be developed. METHODS The mutant human ND4 gene with a guanine to adenine transition at position 11778 with an attached FLAG epitope under control of the mitochondrial heavy strand promoter (HSP) was inserted into a modified self-complementary (sc) adeno-associated virus (AAV) backbone. The HSP-ND4FLAG was directed toward the mitochondria by adding the 23 amino acid cytochrome oxidase subunit 8 (COX8) presequence fused in frame to the N-terminus of green fluorescent protein (GFP) into the AAV2 capsid open reading frame. The packaged scAAV-HSP mutant ND4 was injected into the vitreous cavity of normal mice (OD). Contralateral eyes received scAAV-GFP (OS). Translocation and integration of mutant human ND4 in mouse mitochondria were assessed with PCR, reverse transcription-polymerase chain reaction (RT-PCR), sequencing, immunoblotting, and immunohistochemistry. Visual function was monitored with serial pattern electroretinography (PERG) and in vivo structure with spectral domain optical coherence tomography (OCT). Animals were euthanized at 1 year and processed for light and transmission electron microscopy. RESULTS The PCR products of the mitochondrial and nuclear DNA extracted from infected retinas and optic nerves gave the expected 500 base pair bands. RT-PCR confirmed transcription of the mutant human ND4 DNA in mice. DNA sequencing confirmed that the PCR and RT-PCR products were mutant human ND4 (OD only). Immunoblotting revealed the expression of mutant ND4FLAG (OD only). Pattern electroretinograms showed a significant decrement in retinal ganglion cell function OD relative to OS at 1 month and 6 months after AAV injections. Spectral domain optical coherence tomography showed optic disc edema starting at 1 month post injection followed by optic nerve head atrophy with marked thinning of the inner retina at 1 year. Histopathology of optic nerve cross sections revealed reductions in the optic nerve diameters of OD versus OS where transmission electron microscopy revealed significant loss of optic nerve axons in mutant ND4 injected eyes where some remaining axons were still in various stages of irreversible degeneration with electron dense aggregation. Electron lucent mitochondria accumulated in swollen axons where fusion of mitochondria was also evident. CONCLUSIONS Due to the UGA codon at amino acid 16, mutant G11778A ND4 was translated only in the mitochondria where its expression led to significant loss of visual function, loss of retinal ganglion cells, and optic nerve degeneration recapitulating the hallmarks of human LHON.
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Affiliation(s)
- Hong Yu
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL
| | - Sacide S. Ozdemir
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL
| | | | - Tsung-Han Chou
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL
| | - Vittorio Porciatti
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL
| | - Vince Chiodo
- Department of Ophthalmology, University of Florida, College of Medicine, Gainesville, FL,Department of Molecular Genetics and Microbiology, University of Florida, College of Medicine, Gainesville, FL
| | - Sanford L. Boye
- Department of Ophthalmology, University of Florida, College of Medicine, Gainesville, FL,Department of Molecular Genetics and Microbiology, University of Florida, College of Medicine, Gainesville, FL
| | - William W. Hauswirth
- Department of Ophthalmology, University of Florida, College of Medicine, Gainesville, FL,Department of Molecular Genetics and Microbiology, University of Florida, College of Medicine, Gainesville, FL
| | - Alfred S. Lewin
- Department of Molecular Genetics and Microbiology, University of Florida, College of Medicine, Gainesville, FL
| | - John Guy
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, FL,Department of Ophthalmology, University of Florida, College of Medicine, Gainesville, FL
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Gucciardi E, Chiodo V, Freni S, Cavallaro S, Galvagno A, Bart JCJ. Ethanol and dimethyl ether steam reforming on Rh/Al2O3 catalysts for high-temperature fuel-cell feeds. Reac Kinet Mech Cat 2011. [DOI: 10.1007/s11144-011-0335-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Petrs-Silva H, Dinculescu A, Li Q, Deng WT, Pang JJ, Min SH, Chiodo V, Neeley AW, Govindasamy L, Bennett A, Agbandje-McKenna M, Zhong L, Li B, Jayandharan GR, Srivastava A, Lewin AS, Hauswirth WW. Novel properties of tyrosine-mutant AAV2 vectors in the mouse retina. Mol Ther 2010; 19:293-301. [PMID: 21045809 DOI: 10.1038/mt.2010.234] [Citation(s) in RCA: 211] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Vectors based on adeno-associated virus serotype 2 (AAV2) have been used extensively in many gene-delivery applications, including several successful clinical trials for one type of Leber congenital amaurosis in the retina. Many studies have focused on improving AAV2 transduction efficiency and cellular specificity by genetically engineering its capsid. We have previously shown that vectors-containing single-point mutations of capsid surface tyrosines in serotypes AAV2, AAV8, and AAV9 displayed significantly increased transduction efficiency in the retina compared with their wild-type counterparts. In the present study, we evaluated the transduction characteristics of AAV2 vectors containing combinations of multiple tyrosine to phenylalanine mutations in seven highly conserved surface-exposed capsid tyrosine residues following subretinal or intravitreal delivery in adult mice. The multiply mutated vectors exhibited different in vivo transduction properties, with some having a unique ability of transgene expression in all retinal layers. Such novel vectors may be useful in developing valuable new therapeutic strategies for the treatment of many genetic diseases.
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Affiliation(s)
- Hilda Petrs-Silva
- Department of Ophthalmology, University of Florida, Gainesville, FL, USA
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Petersen-Jones S, Bartoe J, Fischer A, Scott M, Boye S, Chiodo V, Hauswirth W. AAV retinal transduction in a large animal model species: comparison of a self-complementary AAV2/5 with a single-stranded AAV2/5 vector. Mol Vis 2009; 15:1835-42. [PMID: 19756181 PMCID: PMC2743804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Accepted: 09/01/2009] [Indexed: 12/02/2022] Open
Abstract
PURPOSE To compare self-complementary (sc) and single-stranded (ss) adeno-associated viral 2/5 (AAV2/5) vectors for retinal cell transduction in the dog when delivered by subretinal injection. METHODS ScAAV2/5 and ssAAV2/5 vectors encoding enhanced green fluorescent protein (GFP) under control of the chicken beta actin promoter were prepared to the same titer. Equal amounts of viral particles were delivered into the subretinal spaces of both eyes of two dogs. In each dog, one eye received the scAAV2/5 and the other the ssAAV2/5. In vivo expression of GFP was monitored ophthalmoscopically. The dogs were sacrificed, and their retinas were examined by fluorescent microscopy and immunohistochemistry to determine GFP expression patterns and to assay for glial reactivity. RESULTS GFP expression in the scAAV2/5 injected eyes was detectable at a much earlier time point than in the ssAAV2/5 injected eyes. Expression of GFP was also at higher levels in the scAAV2/5-injected eyes. Expression levels remained stable for the seven month duration of the study. The types of cells transduced by both vectors were similar; there was strong reporter gene expression in the RPE and photoreceptors, although not all cones in the transduced area expressed GFP. Some horizontal and Müller cells were also transduced. CONCLUSIONS When delivered by subretinal injection in the dog, scAAV2/5 induces faster and stronger transgene expression than ssAAV2/5. The spectrum of retinal neurons transduced is similar between the two vectors. These results confirm in a large animal model those previously reported in the mouse. ScAAV2/5 shows promise for use in the treatment of conditions where a rapid transgene expression is desirable. Furthermore, it may be possible to use a lower number of viral particles to achieve the same effect compared with ssAAV2/5 vectors.
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Affiliation(s)
- S.M. Petersen-Jones
- Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, MI
| | - J.T. Bartoe
- Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, MI
| | - A.J. Fischer
- Department of Neuroscience, The Ohio State University, Columbus, OH
| | - M. Scott
- Department of Neuroscience, The Ohio State University, Columbus, OH
| | - S.L. Boye
- Department of Ophthalmology, University of Florida, Gainesville, FL
| | - V. Chiodo
- Department of Ophthalmology, University of Florida, Gainesville, FL
| | - W.W. Hauswirth
- Department of Ophthalmology, University of Florida, Gainesville, FL
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Li Q, Miller R, Han PY, Pang J, Dinculescu A, Chiodo V, Hauswirth WW. Intraocular route of AAV2 vector administration defines humoral immune response and therapeutic potential. Mol Vis 2008; 14:1760-9. [PMID: 18836574 PMCID: PMC2559816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Accepted: 09/09/2008] [Indexed: 12/02/2022] Open
Abstract
PURPOSE Safety and efficiency are critical for successful gene therapy. Adeno-associated viral (AAV) vectors are commonly used for gene transfer in both human and animal studies. However, administration of AAV vectors can lead to development of neutralizing antibodies against the vector capsid, thus decreasing the efficiency of therapeutic gene transfer and preventing effective vector readministration. We investigated immune responses to different routes of ocular administration and readministration of AAV vectors, and the effect of previous exposure of AAV vector in one eye on the transduction efficacy of subsequent intraocular AAV-mediated gene delivery to the partner eye. METHODS We tested two vector systems. One contained a cDNA encoding a secreted pigment epithelial derived factor (PEDF) cDNA under the control of a Cytomegalovirus (CMV) enhancer and chicken beta-actin promoter (CBA; AAV2-CBA-PEDF) and was tested in a murine model of laser-induced choroidal neovascularization (CNV). The other vector contained a cDNA encoding the intracellular reporter green fluorescent protein (GFP) under the control of the same promoter (AAV2-CBA-GFP). Animals were divided into groups and received sequential injections at different combinations of either intravitreal or subretinal routes. CNV was evaluated by fluorescein angiographic choroidal flat-mount image analysis. The expression of GFP was analyzed in retinal sections by direct fluorescence imaging. Antibodies against AAV2 capsid and transgenes were analyzed by ELISA using serum samples collected before injection and different time points after the injection. Neutralizing antibodies were characterized by in vitro assays. RESULTS Various ocular compartments responded to AAV administration differently. Intravitreal administration of AAV vectors, which resulted in transduction of inner retina (primarily retinal ganglion cells), generated a humoral immune response against AAV capsid that blocked vector expression upon readministration via the same route into the partner eye. In contrast, it had no effect on vector readministered into the subretinal space of the partner eye. Additionally, subretinal administration of vector did not trigger any humoral immune response against AAV capsid, and had no effect on subsequent administration of vector either intravitreally or subretinally into the partner eye. CONCLUSIONS These findings have important clinical implications for the design of AAV-mediated ocular gene transfer for retinal diseases, particularly if both eyes require sequential treatment.
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Loiler SA, Tang Q, Clarke T, Campbell-Thompson ML, Chiodo V, Hauswirth W, Cruz P, Perret-Gentil M, Atkinson MA, Ramiya VK, Flotte TR. Localized Gene Expression Following Administration of Adeno-associated Viral Vectors via Pancreatic Ducts. Mol Ther 2005; 12:519-27. [PMID: 15979413 DOI: 10.1016/j.ymthe.2005.04.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2004] [Revised: 04/01/2005] [Accepted: 04/12/2005] [Indexed: 12/16/2022] Open
Abstract
Gene transfer into pancreatic cells in vivo could be of immense therapeutic benefit in cases of type 1 diabetes (T1D) through the production of molecules capable of interrupting the progression of autoimmunity or promoting regeneration of insulin-secreting beta cells. We adapted a clinically relevant surgical technique (endoscopic retrograde cholangiopancreatography) to deliver rAAV encoding human alpha1-antitrypsin (approved gene symbol SERPINA1) to the pancreas of 3-week-old Fisher 344 rats and C57BL/6 mice. We compared natural as well as bioengineered serotypes of rAAV (rAAV1, rAAV2/Apo, rAAV8) as well as different promoters (chicken beta-actin, human insulin) for their expression in vivo. Rats injected with rAAV1 showed the highest hAAT expression (week 2, rAAV1/CB-AT, 579 +/- 457 ng/ml). In mice, rAAV8 vector delivered the highest serum concentration of hAAT (week 2, rAAV8/CB-AT, 19 +/- 6 microg/ml). The chicken beta-actin promoter provided the highest expression in both rodent experiments. Immunohistochemical staining indicated transduction primarily of pancreatic acinar cells with either the rAAV1/CB-AT vector in the rat or the rAAV8/CB-AT vector in the mouse. This study demonstrates that rAAV vectors can be designed to deliver therapeutic genes efficiently to the pancreas and achieve high levels of gene expression and may be useful in treating pancreatic disorders, including T1D.
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Affiliation(s)
- Scott A Loiler
- Powell Gene Therapy Center, University of Florida, Gainesville, FL 32610, USA
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Petrs-Silva H, Chiodo V, Chiarini LB, Hauswirth WW, Linden R. Modulation of the expression of the transcription factor Max in rat retinal ganglion cells by a recombinant adeno-associated viral vector. Braz J Med Biol Res 2005; 38:375-9. [PMID: 15761617 DOI: 10.1590/s0100-879x2005000300008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Exclusion of the transcription factor Max from the nucleus of retinal ganglion cells is an early, caspase-independent event of programmed cell death following damage to the optic axons. To test whether the loss of nuclear Max leads to a reduction in neuroprotection, we developed a procedure to overexpress Max protein in rat retinal tissue in vivo. A recombinant adeno-associated viral vector (rAAV) containing the max gene was constructed, and its efficiency was confirmed by transduction of HEK-293 cells. Retinal ganglion cells were accessed in vivo through intravitreal injections of the vector in rats. Overexpression of Max in ganglion cells was detected by immunohistochemistry at 2 weeks following rAAV injection. In retinal explants, the preparation of which causes damage to the optic axons, Max immunoreactivity was increased after 30 h in vitro, and correlated with the preservation of a healthy morphology in ganglion cells. The data show that the rAAV vector efficiently expresses Max in mammalian retinal ganglion cells, and support the hypothesis that the Max protein plays a protective role for retinal neurons.
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Affiliation(s)
- H Petrs-Silva
- Instituto de Biofísica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
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Frusteri F, Freni S, Spadaro L, Chiodo V, Bonura G, Donato S, Cavallaro S. H2 production for MC fuel cell by steam reforming of ethanol over MgO supported Pd, Rh, Ni and Co catalysts. CATAL COMMUN 2004. [DOI: 10.1016/j.catcom.2004.07.015] [Citation(s) in RCA: 208] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Waldman RH, Bergmann KC, Stone J, Howard S, Chiodo V, Jacknowitz A, Waldman ER, Khakoo R. Age-dependent antibody response in mice and humans following oral influenza immunization. J Clin Immunol 1987; 7:327-32. [PMID: 3611299 DOI: 10.1007/bf00915555] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In order to compare the antibody response in serum and secretions from healthy young subjects and the elderly (greater than 60 years), volunteers were immunized with the commercial inactivated influenza virus vaccine, by the usual (parenteral) route or orally. Also, young and old mice (mean age, 20 months) were orally immunized with live influenza virus. The older mice responded with a very slight rise in their serum and respiratory tract antibody levels compared with the young mice but showed no diminution in protection against lethal viral challenge. Elderly volunteers showed only slight serum antibody responses after parenteral immunization compared with the young. Neither group demonstrated a rise in serum antibody following oral immunization. With respect to the secretory IgA (SIgA) antibody response, certain differences were noted between the young and the elderly: the preimmunization levels of antibody to influenza virus were significantly greater in nasal secretions and saliva in the elderly as compared to the young volunteers, and the salivary antibody response was diminished in the elderly. This lack of a salivary antibody response in the elderly was explicable by the inverse relationship between the preimmunization SIgA antibody titers and the response to immunization. Oral immunization led to no more side effects than observed in the placebo control group.
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