{"id":15245,"date":"2017-10-23T10:33:25","date_gmt":"2017-10-23T17:33:25","guid":{"rendered":"https:\/\/vermont.salk.edu\/?post_type=disclosure&p=15245"},"modified":"2024-01-30T15:27:07","modified_gmt":"2024-01-30T23:27:07","slug":"salk-scientists-lead-25-million-initiative-develop-atlas-brain-cell-types","status":"publish","type":"disclosure","link":"https:\/\/www.salk.edu\/zh\/news-release\/salk-scientists-lead-25-million-initiative-develop-atlas-brain-cell-types\/","title":{"rendered":"Salk scientists lead $25 million initiative to develop atlas of brain cell types"},"content":{"rendered":"

LA JOLLA\u2014Salk Institute scientists will lead a multimillion-dollar, five-year initiative to revolutionize our understanding of the human brain by systematically identifying and cataloging cell types across the mammalian brain, the National Institutes of Health has announced<\/a>. The effort, which is part of the Brain Research through Advancing Innovative Neurotechnologies (BRAIN) Initiative\u00ae, will be co-led by Salk Professors \u7ea6\u745f\u592b\u00b7\u57c3\u514b\u5c14<\/a> \u548c Ed Callaway<\/a>. Researchers from USC and UC San Diego will also participate in the collaboration.<\/p>\n

\"Nerve<\/a>
Nerve cells in the mouse brain that have been labeled with a modified rabies virus and fluorescent proteins.<\/p>\n

Click here<\/a> for a high-resolution image.<\/p>\n

Credit: Marina Garrett<\/figcaption><\/figure>\n

“Developing an atlas of brain cell types is an incredibly ambitious undertaking but one that is critical to uncover brain function,” says Salk President Elizabeth Blackburn<\/a>. “With this generous grant, we will be able to better understand\u00a0the organ that not only makes us who we are, but whose dysfunction\u2014from mental illness to the degeneration of Alzheimer\u2019s disease\u2014causes some of the most acute kinds of human suffering.”<\/p>\n

The brain is not just made up of one type of neuron, but many types of cells that scientists are just beginning to identify. Pinpointing these different cells can help reveal how the brain works\u2014and what happens when it doesn\u2019t\u2014but scientists lack a systematic catalog that identifies cell types across the entire brain. They also lack appropriate means for genetically targeting the majority of cell types for research into therapeutic uses, particularly in humans.<\/p>\n

To address these limitations, Ecker and Callaway, along with Salk colleagues and other collaborators, propose a series of integrated experiments to identify, catalog and characterize brain cell types in mice via molecular signatures and then link those cells types to their inputs and outputs. Of particular use will be a method pioneered by the Callaway lab to use modified rabies virus to trace connections between nerve cells. The project, called the Center for Epigenomics of the Mouse Brain Atlas (CEMBA), will require collecting data from over 100 brain regions covering the entire mouse brain and associating those cell types with anatomical features that may be common to nervous systems generally and therefore subject to similar methods of monitoring and manipulation in other species.<\/p>\n

“One of the first steps in understanding how any complex system works, from a car to a computer, is to come up with a parts list,” says Joseph Ecker, Howard Hughes Medical Institute Investigator and director of Salk’s Genomic Analysis Laboratory. “In the case of the brain, we have only just begun to identify the myriad cell types we know must exist. Once we have a more complete understanding of what the parts are, we will be able to investigate their function and, perhaps more importantly, their dysfunction. This grant represents a big leap forward in achieving those goals.”<\/p>\n

\"From
From left: Joseph Ecker, Kuo-Fen Lee, Ed Callaway, Margarita Behrens and Xin Jin<\/p>\n

Click here<\/a> for a high-resolution image. <\/p>\n

Credit: Salk Institute<\/figcaption><\/figure>\n

The Salk center is\u00a0focused on single-cell epigenetics\u2014the chemical changes to DNA that are\u00a0responsible for controlling the differences in gene expression that make each brain\u00a0cell type unique. The team expects that this information will\u00a0be particularly useful\u00a0for creating tools to target these same cell types in future studies of brain\u00a0circuit function.<\/p>\n

“We are excited to be part of a collaborative\u00a0team composed of several different NIH-funded Centers that will make up the BRAIN\u00a0Initiative Cell Census Network (BICCN),” says Salk Professor Ed Callaway, who holds the Audrey Geisel Chair in Biomedical Science. “Recent advances in single-cell\u00a0genomic\u00a0technology have made it possible to genetically interrogate millions of\u00a0individual brain cells. This work will lay a foundation for the study of brain circuits with impact\u00a0comparable to what sequencing the genome had on cell and molecular biology.”<\/p>\n

The collaboration includes:<\/p>\n