Mammals rely heavily on their olfactory systems for survival and reproduction. The accessory olfactory system (AOS), best known for its role in pheromone processing, is a dedicated system for the detection of non-volatile social chemosignals. Such social chemosignals are thought to help identify conspecifics and heterospecifics, as well as convey information about the physiological state of other animals. Interestingly, the accessory olfactory bulb (AOB), the first and only dedicated circuit in the AOS, has been shown to change how it processes social stimuli after experience. However, the mechanisms by which experience induces this plasticity are not well understood. The overall goal of this project is to better understand how experience can shape neural circuits. The proposed research will utilize electrophysiology to first identify physiological changes in interneurons induced by repeated experience. In addition, single cell RNA sequencing will be used to identify activity- dependent changes in gene expression. Finally, chemogenetic strategies will be used to manipulate the interneuron populations that undergo plasticity to determine if they play a direct role in behavioral output. By identifying changes in the physiology and gene expression of AOB interneurons, and determining their behavioral role after repeated social experience, this work will help identify the mechanisms involved in the central processing of chemosensory information and determine the contributions of interneurons to mammalian social behavior.

Public Health Relevance

Sensory experience shapes neural circuits and changes how information is processed in the brain. This pre- doctoral research training plan will identify mechanisms involved in the refinement of mammalian central chemosensory information processing following social encounters. The proposed experiments will increase our understanding of the role of experience in neural circuit plasticity, provide extensive training in neuroscience techniques and analyses, and offer many additional avenues for professional development.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Predoctoral Individual National Research Service Award (F31)
Project #
1F31DC018440-01
Application #
9908499
Study Section
Special Emphasis Panel (ZDC1)
Program Officer
Rivera-Rentas, Alberto L
Project Start
2019-08-27
Project End
2022-08-26
Budget Start
2019-08-27
Budget End
2020-08-26
Support Year
1
Fiscal Year
2019
Total Cost
Indirect Cost
Name
University of Texas Sw Medical Center Dallas
Department
Neurosciences
Type
Schools of Medicine
DUNS #
800771545
City
Dallas
State
TX
Country
United States
Zip Code
75390