The main objective of this project is to provide a rationale for future therapeutic targeting of the c-myc IRES which mediates cap-independent translation in multiple myeloma cells. IRES-dependent myc translation is critical for tumor cell survival during ER stress in this tumor model.
The aims i nclude studying the mechanism by which the MNK kinase, the hnRNP A1 ITAF and the ribosomal protein RPS25 mediate IRES function; the mechanism and importance of myc inducing A1 and RPS25 expression and the potential for an inhibitor of IRES function in myeloma. The viability versus death of myeloma cells as well as their ability to achieve c-myc translation and IRES activity in vitro will be studied. In addition, a murine model of c-myc-driven myeloma will be exploited to determine the in vivo roles of hnRNPA1 and IRES activity in tumor progression as well as the potential efficacy of our IRES inhibitors.

Public Health Relevance

The goal of the project is to provide experimental support for development of inhibitors that prevent the synthesis of the oncoprotein c-myc in multiple myeloma. If successful, this new category of agents would present a significant addition to the current armamentarium of drugs used for this incurable malignancy.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA214246-05
Application #
10111470
Study Section
Developmental Therapeutics Study Section (DT)
Program Officer
Howcroft, Thomas K
Project Start
2017-03-17
Project End
2022-02-28
Budget Start
2021-03-01
Budget End
2022-02-28
Support Year
5
Fiscal Year
2021
Total Cost
Indirect Cost
Name
University of California Los Angeles
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
092530369
City
Los Angeles
State
CA
Country
United States
Zip Code
90095