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Pomeranz L, Li R, Yu X, Kelly L, Hassanzadeh G, Molina H, Gross D, Brier M, Vaisey G, Wang P, Jimenez-Gonzalez M, Garcia-Ocana A, Dordick J, Friedman J, Stanley S. Magnetogenetic cell activation using endogenous ferritin. bioRxiv 2024:2023.06.20.545120. [PMID: 37786709 PMCID: PMC10541561 DOI: 10.1101/2023.06.20.545120] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
The ability to precisely control the activity of defined cell populations enables studies of their physiological roles and may provide therapeutic applications. While prior studies have shown that magnetic activation of ferritin-tagged ion channels allows cell-specific modulation of cellular activity, the large size of the constructs made the use of adeno-associated virus, AAV, the vector of choice for gene therapy, impractical. In addition, simple means for generating magnetic fields of sufficient strength have been lacking. Toward these ends, we first generated a novel anti-ferritin nanobody that when fused to transient receptor potential cation channel subfamily V member 1, TRPV1, enables direct binding of the channel to endogenous ferritin in mouse and human cells. This smaller construct can be delivered in a single AAV and we validated that it robustly enables magnetically induced cell activation in vitro . In parallel, we developed a simple benchtop electromagnet capable of gating the nanobody-tagged channel in vivo . Finally, we showed that delivering these new constructs by AAV to pancreatic beta cells in combination with the benchtop magnetic field delivery stimulates glucose-stimulated insulin release to improve glucose tolerance in mice in vivo . Together, the novel anti-ferritin nanobody, nanobody-TRPV1 construct and new hardware advance the utility of magnetogenetics in animals and potentially humans.
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Walsh JJ, Friedman AK, Sun H, Heller EA, Ku SM, Juarez B, Burnham VL, Mazei-Robison MS, Ferguson D, Golden SA, Koo JW, Chaudhury D, Christoffel DJ, Pomeranz L, Friedman JM, Russo SJ, Nestler EJ, Han MH. Stress and CRF gate neural activation of BDNF in the mesolimbic reward pathway. Nat Neurosci 2014; 17:27-9. [PMID: 24270188 PMCID: PMC3984932 DOI: 10.1038/nn.3591] [Citation(s) in RCA: 153] [Impact Index Per Article: 15.3] [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: 07/09/2013] [Accepted: 10/31/2013] [Indexed: 02/06/2023]
Abstract
Mechanisms controlling release of brain-derived neurotrophic factor (BDNF) in the mesolimbic dopamine reward pathway remain unknown. We report that phasic optogenetic activation of this pathway increases BDNF amounts in the nucleus accumbens (NAc) of socially stressed mice but not of stress-naive mice. This stress gating of BDNF signaling is mediated by corticotrophin-releasing factor (CRF) acting in the NAc. These results unravel a stress context-detecting function of the brain's mesolimbic circuit.
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Affiliation(s)
- Jessica J. Walsh
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Allyson K. Friedman
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Haosheng Sun
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Elizabeth A. Heller
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Stacy M. Ku
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Barbara Juarez
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Veronica L. Burnham
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Michelle S. Mazei-Robison
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Deveroux Ferguson
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Sam A. Golden
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Ja Wook Koo
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Dipesh Chaudhury
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Daniel J. Christoffel
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Lisa Pomeranz
- Laboratory of Molecular Genetics, Howard Hughes Medical Institute, Rockefeller University, New York, New York 10056, USA
| | - Jeffrey M. Friedman
- Laboratory of Molecular Genetics, Howard Hughes Medical Institute, Rockefeller University, New York, New York 10056, USA
| | - Scott J. Russo
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Eric J. Nestler
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Ming-Hu Han
- Department of Pharmacology and Systems Therapeutics, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
- Fishberg Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
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Smith GA, Pomeranz L, Gross SP, Enquist LW. Local modulation of plus-end transport targets herpesvirus entry and egress in sensory axons. Proc Natl Acad Sci U S A 2004; 101:16034-9. [PMID: 15505210 PMCID: PMC528757 DOI: 10.1073/pnas.0404686101] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.2] [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: 01/02/2023] Open
Abstract
The core structures of many viruses move within cells by association with host cytoskeletal motor proteins; however, the mechanisms by which intracellular viral particles are transported toward sites of replication or the cell periphery at distinct stages of infection remain to be understood. The regulation of herpesvirus directional transport in sensory neurons was examined by tracking individual viral capsids within axons at multiple frames per s. After entry into axons, capsids underwent bidirectional and saltatory movement to the cell body independently of endosomes. A comparison of entry transport to a previous analysis of capsid axonal transport during egress revealed that capsid targeting in and out of cells occurs by modulation of plus-end, but not minus-end, motion. Entry transport was unperturbed by the presence of egressing virus from a prior infection, indicating that transport direction is not modulated globally by viral gene expression, but rather directly by a component of the viral particle.
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Affiliation(s)
- G A Smith
- Department of Microbiology-Immunology, Ward Building, Room 10-105, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
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