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Pinyon JL, von Jonquieres G, Crawford EN, Abed AA, Power JM, Klugmann M, Browne CJ, Housley DM, Wise AK, Fallon JB, Shepherd RK, Lin JY, McMahon C, McAlpine D, Birman CS, Lai W, Enke YL, Carter PM, Patrick JF, Gay RD, Marie C, Scherman D, Lovell NH, Housley GD. Gene Electrotransfer via Conductivity-Clamped Electric Field Focusing Pivots Sensori-Motor DNA Therapeutics: "A Spoonful of Sugar Helps the Medicine Go Down". ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401392. [PMID: 38874431 PMCID: PMC11321635 DOI: 10.1002/advs.202401392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 05/20/2024] [Indexed: 06/15/2024]
Abstract
Viral vectors and lipofection-based gene therapies have dispersion-dependent transduction/transfection profiles that thwart precise targeting. The study describes the development of focused close-field gene electrotransfer (GET) technology, refining spatial control of gene expression. Integration of fluidics for precise delivery of "naked" plasmid deoxyribonucleic acid (DNA) in sucrose carrier within the focused electric field enables negative biasing of near-field conductivity ("conductivity-clamping"-CC), increasing the efficiency of plasma membrane molecular translocation. This enables titratable gene delivery with unprecedently low charge transfer. The clinic-ready bionics-derived CC-GET device achieved neurotrophin-encoding miniplasmid DNA delivery to the cochlea to promote auditory nerve regeneration; validated in deafened guinea pig and cat models, leading to improved central auditory tuning with bionics-based hearing. The performance of CC-GET is evaluated in the brain, an organ problematic for pulsed electric field-based plasmid DNA delivery, due to high required currents causing Joule-heating and damaging electroporation. Here CC-GET enables safe precision targeting of gene expression. In the guinea pig, reporter expression is enabled in physiologically critical brainstem regions, and in the striatum (globus pallidus region) delivery of a red-shifted channelrhodopsin and a genetically-encoded Ca2+ sensor, achieved photoactivated neuromodulation relevant to the treatment of Parkinson's Disease and other focal brain disorders.
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Affiliation(s)
- Jeremy L. Pinyon
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
- Charles Perkins CentreSchool of Medical SciencesFaculty of Medicine and HealthUniversity of SydneySydneyNSW2006Australia
| | - Georg von Jonquieres
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
| | - Edward N. Crawford
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
| | - Amr Al Abed
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
| | - John M. Power
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
| | - Matthias Klugmann
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
| | - Cherylea J. Browne
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
- Medical SciencesSchool of ScienceWestern Sydney UniversitySydneyNSW2560Australia
| | - David M. Housley
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
| | - Andrew K. Wise
- Bionics Institute384–388 Albert StreetEast MelbourneVIC3002Australia
- Medical BionicsDepartment of OtolaryngologyUniversity of MelbourneMelbourneVIC3002Australia
| | - James B. Fallon
- Bionics Institute384–388 Albert StreetEast MelbourneVIC3002Australia
- Medical BionicsDepartment of OtolaryngologyUniversity of MelbourneMelbourneVIC3002Australia
| | - Robert K. Shepherd
- Bionics Institute384–388 Albert StreetEast MelbourneVIC3002Australia
- Medical BionicsDepartment of OtolaryngologyUniversity of MelbourneMelbourneVIC3002Australia
| | - John Y. Lin
- Tasmanian School of MedicineUniversity of TasmaniaHobartTAS7001Australia
| | - Catherine McMahon
- Faculty of Medicine and Health SciencesThe Hearing HubMacquarie UniversitySydney2109Australia
| | - David McAlpine
- Faculty of Medicine and Health SciencesThe Hearing HubMacquarie UniversitySydney2109Australia
| | - Catherine S. Birman
- Faculty of Medicine and Health SciencesThe Hearing HubMacquarie UniversitySydney2109Australia
- Faculty of Medicine and HealthUniversity of SydneySydneyNSW2006Australia
- Department of OtolaryngologyRoyal Prince Alfred HospitalCamperdownNSW2050Australia
- NextSenseRoyal Institute of Deaf and Blind ChildrenGladesvilleNSW2111Australia
| | - Waikong Lai
- NextSenseRoyal Institute of Deaf and Blind ChildrenGladesvilleNSW2111Australia
| | - Ya Lang Enke
- Cochlear LimitedMacquarie UniversityUniversity AvenueMacquarie ParkNSW2109Australia
| | - Paul M. Carter
- Cochlear LimitedMacquarie UniversityUniversity AvenueMacquarie ParkNSW2109Australia
| | - James F. Patrick
- Cochlear LimitedMacquarie UniversityUniversity AvenueMacquarie ParkNSW2109Australia
| | - Robert D. Gay
- Cochlear LimitedMacquarie UniversityUniversity AvenueMacquarie ParkNSW2109Australia
| | - Corinne Marie
- CNRS, Inserm, UTCBSUniversité Paris CitéParisF‐75006France
- Chimie ParisTechUniversité PSLParis75005France
| | - Daniel Scherman
- CNRS, Inserm, UTCBSUniversité Paris CitéParisF‐75006France
- Fondation Maladies Rares96 rue DidotParis75014France
| | - Nigel H. Lovell
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
| | - Gary D. Housley
- Translational Neuroscience FacilityDepartment of PhysiologySchool of Biomedical SciencesGraduate School of Biomedical EngineeringTyree Institute for Health Engineering (IHealthE)UNSWSydneyNSW2052Australia
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Khurana L, Harczos T, Moser T, Jablonski L. En route to sound coding strategies for optical cochlear implants. iScience 2023; 26:107725. [PMID: 37720089 PMCID: PMC10502376 DOI: 10.1016/j.isci.2023.107725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023] Open
Abstract
Hearing loss is the most common human sensory deficit. Severe-to-complete sensorineural hearing loss is often treated by electrical cochlear implants (eCIs) bypassing dysfunctional or lost hair cells by direct stimulation of the auditory nerve. The wide current spread from each intracochlear electrode array contact activates large sets of tonotopically organized neurons limiting spectral selectivity of sound coding. Despite many efforts, an increase in the number of independent eCI stimulation channels seems impossible to achieve. Light, which can be better confined in space than electric current may help optical cochlear implants (oCIs) to overcome eCI shortcomings. In this review, we present the current state of the optogenetic sound encoding. We highlight optical sound coding strategy development capitalizing on the optical stimulation that requires fine-grained, fast, and power-efficient real-time sound processing controlling dozens of microscale optical emitters as an emerging research area.
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Affiliation(s)
- Lakshay Khurana
- Institute for Auditory Neuroscience, University Medical Center Göttingen, Göttingen, Germany
- Auditory Neuroscience and Optogenetics Laboratory, German Primate Center, Göttingen, Germany
- Auditory Neuroscience and Synaptic Nanophysiology Group, Max-Planck-Institute for Multidisciplinary Sciences, Göttingen, Germany
- Junior Research Group “Computational Neuroscience and Neuroengineering”, Göttingen, Germany
- The Doctoral Program “Sensory and Motor Neuroscience”, Göttingen Graduate Center for Neurosciences, Biophysics, and Molecular Biosciences (GGNB), Göttingen, Germany
- InnerEarLab, University Medical Center Göttingen, Göttingen, Germany
| | - Tamas Harczos
- Institute for Auditory Neuroscience, University Medical Center Göttingen, Göttingen, Germany
- Auditory Neuroscience and Optogenetics Laboratory, German Primate Center, Göttingen, Germany
| | - Tobias Moser
- Institute for Auditory Neuroscience, University Medical Center Göttingen, Göttingen, Germany
- Auditory Neuroscience and Optogenetics Laboratory, German Primate Center, Göttingen, Germany
- Auditory Neuroscience and Synaptic Nanophysiology Group, Max-Planck-Institute for Multidisciplinary Sciences, Göttingen, Germany
- InnerEarLab, University Medical Center Göttingen, Göttingen, Germany
- Cluster of Excellence “Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells” (MBExC), University of Göttingen, Göttingen, Germany
| | - Lukasz Jablonski
- Institute for Auditory Neuroscience, University Medical Center Göttingen, Göttingen, Germany
- Auditory Neuroscience and Optogenetics Laboratory, German Primate Center, Göttingen, Germany
- Junior Research Group “Computational Neuroscience and Neuroengineering”, Göttingen, Germany
- InnerEarLab, University Medical Center Göttingen, Göttingen, Germany
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Preeti K, Sood A, Fernandes V. Metabolic Regulation of Glia and Their Neuroinflammatory Role in Alzheimer's Disease. Cell Mol Neurobiol 2021; 42:2527-2551. [PMID: 34515874 DOI: 10.1007/s10571-021-01147-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 09/02/2021] [Indexed: 12/13/2022]
Abstract
Alzheimer's disease (AD) is an aging-related neurodegenerative disorder. It is characterized clinically by progressive memory loss and impaired cognitive function. Its progression occurs from neuronal synapse loss to amyloid pathology and Tau deposit which eventually leads to the compromised neuronal function. Neurons in central nervous tissue work in a composite and intricate network with the glia and vascular cells. Microglia and astrocytes are becoming the prime focus due to their involvement in various aspects of neurophysiology, such as trophic support to neurons, synaptic modulation, and brain surveillance. AD is also often considered as the sequela of prolonged metabolic dyshomeostasis. The neuron and glia have different metabolic profiles as cytosolic glycolysis and mitochondrial-dependent oxidative phosphorylation (OXPHOS), especially under dyshomeostasis or with aging pertaining to their unique genetic built-up. Various efforts are being put in to decipher the role of mitochondrial dynamics regarding their trafficking, fission/fusion imbalance, and mitophagy spanning over both neurons and glia to improve aging-related brain health. The mitochondrial dysfunction may lead to activation in various signaling mechanisms causing metabolic reprogramming in glia cells, further accelerating AD-related pathogenic events. The glycolytic-dominant astrocytes switch to the neurotoxic phenotype, i.e., disease-associated astrocyte under metabolic stress. The microglia also transform from resting to reactive phenotype, i.e., disease-associated microglia. It may also exist in otherwise a misconception an M1, glycolytic, or M2, an OXPHOS-dependent phenotype. Further, glial transformation plays a vital role in regulating hallmarks of AD pathologies like synapse maintenance, amyloid, and Tau clearance. In this updated review, we have tried to emphasize the metabolic regulation of glial reactivity, mitochondrial quality control mechanisms, and their neuroinflammatory response in Alzheimer's progression.
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Affiliation(s)
- Kumari Preeti
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India.
| | - Anika Sood
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
| | - Valencia Fernandes
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, 500037, India
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