{"id":33433,"date":"2022-02-09T00:00:25","date_gmt":"2022-02-09T08:00:25","guid":{"rendered":"https:\/\/vermont.salk.edu\/?post_type=disclosure&#038;p=33433"},"modified":"2024-01-30T14:27:02","modified_gmt":"2024-01-30T22:27:02","slug":"in-a-first-for-sonogenetics-researchers-control-mammalian-cells-with-sound","status":"publish","type":"disclosure","link":"https:\/\/www.salk.edu\/zh\/news-release\/in-a-first-for-sonogenetics-researchers-control-mammalian-cells-with-sound\/","title":{"rendered":"In a first for \u201csonogenetics,\u201d researchers control mammalian cells with sound"},"content":{"rendered":"<p>LA JOLLA\u2014Salk scientists have engineered mammalian cells to be activated using ultrasound. The method, which the team used to activate human cells in a dish and brain cells inside living mice, paves the way toward non-invasive versions of deep brain stimulation, pacemakers and insulin pumps. The findings were published in <a href=\"https:\/\/www.nature.com\/articles\/s41467-022-28205-y\" target=\"_blank\" rel=\"noopener\"><em>Nature Communications<\/em><\/a> on February 9, 2022.<\/p>\n<div class=\"row\" style=\"\"><div class=\"col-md-12 col-md-push-0\"><div class=\"video-anchor\" id=\"video-tNnRd0JfT4o\"><\/div><div class=\"embed-responsive embed-responsive-16by9\"> <iframe class=\"embed-responsive-item\" src=\"\/\/www.youtube.com\/embed\/tNnRd0JfT4o?rel=0\" webkitallowfullscreen mozallowfullscreen allowfullscreen><\/iframe><\/div><!-- .embed-responsive --><\/div><!-- .col-md-*size --><\/div><!-- .\/row -->\n<p>\u201cGoing wireless is the future for just about everything,\u201d says senior author <a href=\"https:\/\/www.salk.edu\/zh\/scientist\/sreekanth-chalasani\/\">Sreekanth Chalasani<\/a>, an associate professor in Salk\u2019s Molecular Neurobiology Laboratory. \u201cWe already know that ultrasound is safe, and that it can go through bone, muscle and other tissues, making it the ultimate tool for manipulating cells deep in the body.\u201d<\/p>\n<p>About a decade ago, Chalasani pioneered the idea of using ultrasonic waves to stimulate specific groups of genetically marked cells, and coined the term \u201c<a href=\"http:\/\/sonogenetics.salk.edu\/\">sonogenetics<\/a>\u201d to describe it. In 2015, his <a href=\"https:\/\/www.salk.edu\/zh\/news-release\/in-first-salk-scientists-use-sound-waves-to-control-brain-cells\/\">group showed that<\/a>, in the roundworm <em>Caenorhabditis elegans<\/em>, a protein called TRP-4 makes cells sensitive to low-frequency ultrasound. When the researchers added TRP-4 to <em>C. elegans <\/em>neurons that didn\u2019t usually have it, they could activate these cells with a burst of ultrasound\u2014the same sound waves used in medical sonograms.<\/p>\n<figure id=\"attachment_33554\"  class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" class=\"img-responsive wp-image-33554 size-medium\" src=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons-300x300.jpg\" alt=\"Neurons (magenta) in the mouse brain. The Chalasani lab made specific neurons express TRPA1 (white), so they can be activated by ultrasound.\" srcset=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons-300x300.jpg 300w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons-150x150.jpg 150w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons-147x147.jpg 147w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons-458x458.jpg 458w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons-400x400.jpg 400w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons-200x200.jpg 200w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons.jpg 512w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-caption-text\">Neurons (magenta) in the mouse brain. The Chalasani lab made specific neurons express TRPA1 (white), so they can be activated by ultrasound.<br \/><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/TRPA1-expression-in-neurons.jpg\">Click here<\/a> for a high-resolution image.<br \/>Credit: Salk Institute<\/figcaption><\/figure>\n<p>When the researchers tried adding TRP-4 to mammalian cells, however, the protein was not able to make the cells respond to ultrasound. A few mammalian proteins were reported to be ultrasound-sensitive, but none seemed ideal for clinical use. So Chalasani and his colleagues set out to search for a new mammalian protein that made cells highly ultrasound sensitive at 7 MHz, considered an optimal and safe frequency.<\/p>\n<p>\u201cOur approach was different than previous screens because we set out to look for ultrasound-sensitive channels in a comprehensive way,\u201d says Yusuf Tufail, a former project scientist at Salk and a co-first author of the new paper.<\/p>\n<p>The researchers added hundreds of different proteins, one at a time, to a common human research cell line (HEK), which does not usually respond to ultrasound. Then, they put each cell culture under a setup that let them monitor changes to the cells upon ultrasound stimulation.<\/p>\n<p>After screening proteins for more than a year, and working their way through nearly 300 candidates, the scientists finally found one that made the HEK cells sensitive to the 7 MHz ultrasound frequency. TRPA1, a channel protein, was known to let cells respond to the presence of noxious compounds and to activate a range of cells in the human body, including brain and heart cells.<\/p>\n<p>But Chalasani\u2019s team discovered that the channel also opened in response to ultrasound in HEK cells.<\/p>\n<p>\u201cWe were really surprised,\u201d says co-first author of the paper Marc Duque, a Salk exchange student. \u201cTRPA1 has been well-studied in the literature but hasn\u2019t been described as a classical mechanosensitive protein that you\u2019d expect to respond to ultrasound.\u201d<\/p>\n<figure id=\"attachment_33555\"  class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" class=\"img-responsive wp-image-33555 size-medium\" src=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-300x300.jpg\" alt=\"Top from left: Sreekanth Chalasani and Corinne Lee-Kubli.\" srcset=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-300x300.jpg 300w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-1024x1024.jpg 1024w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-150x150.jpg 150w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-768x768.jpg 768w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-767x767.jpg 767w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-147x147.jpg 147w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-458x458.jpg 458w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-585x585.jpg 585w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-553x553.jpg 553w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-750x750.jpg 750w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-945x945.jpg 945w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-1250x1250.jpg 1250w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-400x400.jpg 400w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500-200x200.jpg 200w, https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500.jpg 1500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-caption-text\">Top from left: Sreekanth Chalasani and Corinne Lee-Kubli.<br \/>Bottom from left: Marc Duque and Yusuf Tufail.<br \/><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2022\/01\/Chalasani-PR-team-1500.jpg\">Click here<\/a> for a high resolution image.<br \/>Credit: Top: Salk Institute.<br \/>Bottom from left: Marc Duque and Yusuf Tufail.<\/figcaption><\/figure>\n<p>To test whether the channel could activate other cell types in response to ultrasound, the team used a gene therapy approach to add the genes for human TRPA1 to a specific group of neurons in the brains of living mice. When they then administered ultrasound to the mice, only the neurons with the TRPA1 genes were activated.<\/p>\n<p>Clinicians treating conditions including Parkinson\u2019s disease and epilepsy currently use deep brain stimulation, which involves surgically implanting electrodes in the brain, to activate certain subsets of neurons. Chalasani says that sonogenetics could one day replace this approach\u2014the next step would be developing a gene therapy delivery method that can cross the blood-brain barrier, something that is already being studied.<\/p>\n<p>Perhaps sooner, he says, sonogenetics could be used to activate cells in the heart, as a kind of pacemaker that requires no implantation. \u201cGene delivery techniques already exist for getting a new gene\u2014such as TRPA1\u2014into the human heart,\u201d Chalasani says. \u201cIf we can then use an external ultrasound device to activate those cells, that could really revolutionize pacemakers.\u201d<\/p>\n<p>For now, his team is carrying out more basic work on exactly how TRPA1 senses ultrasound. \u201cIn order to make this finding more useful for future research and clinical applications, we hope to determine exactly what parts of TRPA1 contribute to its ultrasound sensitivity and tweak them to enhance this sensitivity,\u201d says Corinne Lee-Kubli, a co-first author of the paper and former postdoctoral fellow at Salk.<\/p>\n<p>They also plan to carry out another screen for ultrasound sensitive proteins\u2014this time looking for proteins that can inhibit, or shut off, a cell\u2019s activity in response to ultrasound.<\/p>\n<p>The other authors of the paper were Uri Magaram, Janki Patel, Ahana Chakraborty, Jose Mendoza Lopez, Eric Edsinger, Rani Shiao and Connor Weiss of Salk; and Aditya Vasan and James Friend of UC San Diego.<\/p>\n<p>The work was supported by the National Institutes of Health (R01MH111534, R01NS115591), Brain Research Foundation, Kavli Institute of Brain and Mind, Life Sciences Research Foundation, W.M. Keck Foundation (SERF), and the Waitt Advanced Biophotonics and GT3 Cores (which receive funding through NCI CCSG P30014195 and NINDSR24).<\/p>","protected":false},"featured_media":33862,"template":"","faculty":[77],"disease-research":[124],"class_list":["post-33433","disclosure","type-disclosure","status-publish","has-post-thumbnail","hentry","faculty-sreekanth-chalasani","disease-research-neuroscience-and-neurological-disorders"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>In a first for \u201csonogenetics,\u201d researchers control mammalian cells with sound - Salk Institute for Biological Studies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.salk.edu\/zh\/news-release\/in-a-first-for-sonogenetics-researchers-control-mammalian-cells-with-sound\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In a first for \u201csonogenetics,\u201d researchers control mammalian cells with sound - Salk Institute for Biological Studies\" \/>\n<meta property=\"og:description\" content=\"LA JOLLA\u2014Salk scientists have engineered mammalian cells to be activated using ultrasound. 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