Non-invasive, Transgene-free, on-demand Pharmacological Modulation of Neural Activity

非侵入性、非转基因、按需药理调节神经活动

• 批准号: 10322083
• 负责人: Gabriela Romero Uribe
• 金额: $ 21.4万
• 依托单位: UNIVERSITY OF TEXAS SAN ANTONIO
• 依托单位国家: 美国
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10322083
• 关键词: 3-Dimensional; Address; Antibodies; Antibody Specificity; Biological; Brain; Brain Diseases; Brain Mapping; Calcium ion; Cells; Cerebrum; Chemicals; Chemistry; Chlorpromazine; Complex; Corpus striatum structure; Custom; Dependence; Detection; Development; Dopamine; Drug Controls; Electric Conductivity; Electric Stimulation; Engineering; Epilepsy; Feedback; Future; Gold; Growth; Heating; Hybrids; Liquid substance; Magnetic nanoparticles; Magnetism; Mediating; Membrane; Modeling; Modification; Monitor; Nanoconjugate; Nanostructures; Nature; Neural Inhibition; Neuronal Dysfunction; Neurons; Oligonucleotides; Patch-Clamp Techniques; Pharmaceutical Preparations; Pharmacology; Pharmacotherapy; Phosphoproteins; Polymers; Population; Process; Property; Rattus; Reporting; Research Project Grants; Signal Transduction; Specificity; Stimulus; Surface; System; Techniques; Technology; Temperature; Time; Tissues; Transgenes; Translations; Work; autism spectrum disorder; base; biocompatible polymer; blood-brain barrier permeabilization; brain tissue; cell type; clinical translation; clinically relevant; combinatorial; controlled release; design; dopaminergic neuron; dosage; effectiveness validation; ethylene glycol; fluorescence imaging; image guided; implantable device; improved; in vitro Model; in vitro activity; in vivo; iron oxide; magnetic field; mind control; nanomaterials; nanoparticle; nanorod; nanoscale; nervous system disorder; neural circuit; neural network; neural repair; neural stimulation; neuroregulation; neurotransmission; novel; optoacoustic tomography; optogenetics; personalized medicine; photoacoustic imaging; plasmonics; relating to nervous system; response; side effect; tissue phantom; wireless

PROJECT SUMMARY/ABSTRACT Cell-type specific manipulation of neural circuits is required for the treatment of neurological disorders such as epilepsy and autism. Existing technologies to control neural activity offer limited possibilities. Manipulation of brain circuits via direct drug treatment is restricted by the selective permeability of the blood-brain barrier, the rapid clearance of cerebral fluids and the lack of specificity, which results in poor response to drugs and undesirable side effects. Electrical stimulation and optogenetics have open the possibility of repairing neural dysfunction through direct control of brain circuit dynamics. However, both technologies require implantable devices that are damaging to biological tissues. Recently, the heat dissipation by nanomaterials, particularly magnetic nanoparticles (MNPs) and plasmonic nanostructures, has been proposed for the wireless control of cellular signaling using external stimuli. The weak magnetic properties and low electrical conductivity of tissue allow alternating magnetic fields (AMFs) to reach deep into the body, making hysteresis heating of MNPs particularly promising for the treatment of brain disorders. This research grant will develop a novel wireless pharmacological brain modulation approach that depends on MNPs heating effects to release neuromodulatory compounds from temperature-sensitive polymers grafted on the surface of MNPs. Additionally, we will fabricate a nanoconjugate composed of surface engineered MNPs and gold nanorods (GNRs) for photoacoustic tomography (PAT)-guided, magnetothermally-controlled release of neuromodulatory compounds. Preliminary results demonstrate: 1) the heat dissipated by MNPs under AMFs is sufficient for the complete release of a payload from MNP surfaces, 2) MNPs targeting to neuronal membranes via antibody specificity, followed by magnetothermal drug treatment that allows for excitation of neural activity, and 3) the precise control of polymer growth from the surface of MNPs. This research grant drives new advances in stimuli- responsive hybrid nanoparticle systems for personalized pharmacological modulation of neural activity. Wireless magnetothermal release of dopamine and chlorpromazine from polymer coated MNPs is expected to excite and inhibit activity of dopaminergic neurons. Taking advantage of GNRs-mediated PAT, this system will be customized for on-demand release in multiple dosages by triggering heat response with AMFs. Finally, the functional properties of clinically-relevant neural modulation by magnetothermal drug release will be evaluated through in vitro models and rat brains. Magnetothermal modulation of neural activity shows considerable promise as a powerful pharmacological technology that can be applied to restore brain functions, and in single-cell manipulation settings for the better understanding of neural circuits. Future directions of this work include the development of a magnetothermal platform that allow in vivo PAT-monitored pharmacological modulation of neural activity.

项目总结/文摘