? Overall Component Cellular communication between diverse cells is now recognized to heavily influence both cancer initiation and progression. Recently, several new forms of intercellular communication have been recognized, including exchange of proteins and RNAs via extracellular vesicles (EVs) and other carriers. Extracellular RNA (ExRNA) is particularly interesting, as it has the potential to influence gene expression and potentially epigenetic states. MicroRNAs (miRNAs) in particular have been shown to be transferred from one cell type to another to influence gene expression; however, it is clear that many kinds of exRNAs are selectively secreted from cells. What is less clear is how those exRNAs (including miRNAs) are packaged into EVs and other carriers. In addition, the overall impact of these exRNAs on cells and tissues is not yet understood. In this program, we propose to elucidate the ?rules of the game? for extracellular RNA communication, using colorectal carcinoma (CRC) as a model system. Our Program will be highly synergistic, because each Project focuses on a different aspect of this problem. Thus, Project 1 will determine how subcellular contacts between organelles drive RNA and RNA-binding protein (RBP) transfer to EVs in CRC. Project 2 will identify RNA modifications and sequences that drive molecular selection of RNAs for transfer into EVs in CRC. Project 3 will identify how EVs and exomeres mediate EGFR-Wnt crosstalk in CRC. All Projects use common experimental systems, including CRC isogenic cell models, and have common biological focus (e.g. how miR-100 and miR-125b are trafficked and influence recipient cell function in CRC). Integration, synergy, and progress of the Projects will be highly enhanced by the proposed Administrative and Shared Resource Cores. Together this Program will make a major impact in the areas of CRC, tumor microenvironment, exRNA, EVs, and RNA biology.

Public Health Relevance

? Overall Component The overall goal of our Program is to understand how extracellular RNA is secreted and taken up by recipient cells to influence the development and aggressiveness of colorectal carcinomas (CRC). As CRC is the second most common cancer in the United States, we expect our work to highly impact human health.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Program Projects (P01)
Project #
5P01CA229123-02
Application #
10087487
Study Section
Special Emphasis Panel (ZCA1)
Program Officer
Woodhouse, Elizabeth
Project Start
2020-01-22
Project End
2024-12-31
Budget Start
2021-01-01
Budget End
2021-12-31
Support Year
2
Fiscal Year
2021
Total Cost
Indirect Cost
Name
Vanderbilt University Medical Center
Department
Anatomy/Cell Biology
Type
Schools of Medicine
DUNS #
965717143
City
Nashville
State
TN
Country
United States
Zip Code
37203