Decoding the Formation and Degeneration of Neural Circuits via Cell-Type-Specific Surface Proteomics

2024 Seed Grant
Yi-Rong Peng, Ph.D.
University of California, Los Angeles

The nervous system’s complex structure is created by precise connections among many types of cells. Neurodegenerative diseases disrupt these connections, leading to permanent neuron loss and the formation of abnormal connections among surviving neurons. This impairs the function of the remaining neural circuits and hinders the integration of new neurons from stem cells into the damaged areas. These connections are formed by recognition molecules on cell membranes, so this project aims to develop a method to study these membrane proteins in different neuron types during both development and degeneration. Understanding these mechanisms could lead to new treatments for neurodegenerative diseases.

We are focusing on the mammalian retina, which is known for its organized connections and important role in vision. We plan to use advanced techniques to profile specific membrane proteins in various retinal cell types during their development and degeneration. By using machine learning, computational analysis, CRISPR gene manipulation, and high-resolution imaging, we aim to identify key molecular pathways involved in these processes. The methods and insights from studying the retina could be applied to other parts of the nervous system, potentially offering broader implications for understanding and treating neurodegenerative diseases.

Other Grants

Aaron T. Kuan, Ph.D., Yale School of Medicine
Molecular Connectomics Using Pan-Staining Expansion Microscopy
The connectivity between neurons is a “wiring diagram” of the brain. Obtaining such a wiring diagram would help understand how the brain works, as well as what can go wrong…
Heidi C. Meyer, Ph.D., Boston University
Capturing and Constraining Neuronal Ensembles of Fear Memories to Curb Anxiety
Our proposal is motivated by an urgent need to understand aspects of brain development that determine whether an individual will be susceptible to developing a psychiatric disease such as anxiety.…
Robert R. Parrish, Ph.D., Brigham Young University
The Role of Chloride Loading in Seizure Termination
Seizures can significantly impact the lives of those who suffer from them, causing considerable stress, feelings of hopelessness, and depression in patients. Even in their mildest form, seizures can alter…
Jon Resch, Ph.D., University of Iowa
Hypothalamic Circuitry Underlying Thirst
Our bodies need water to survive. Thus, knowing when to drink water, and when not to, is important. This is why some neurons in the brain are devoted to keeping…