The overall goal of this Outstanding Investigator Award (OIA) application is to identify and validate novel targets and therapeutic agents for human cancers with mutant KRas. Overwhelming evidence has accumulated over the last 3 decades that demonstrates significant contributions of mutant KRas to human cancer pathogenesis and patient tumor resistance to therapy, yet no mutant KRas inhibitors have reached clinical trials. The NCI has recognized this as a major challenge and obstacle to making significant progress to clinical outcomes. This OIA application builds on the PI's track-record and expertise in the area of chemical biology and drug discovery in the Ras field and proposes a comprehensive research program focused on targeting KRas and its signaling pathways to develop novel agents that are specific for human tumors that depend on mutant KRas for survival and malignancy. The application will engage in research that tackles this challenging problem on many fronts with several innovative approaches assembled under 4 programs focusing on: 1) Directly targeting mutant KRas by identifying small molecules that bind mutant KRas and lower its affinity for GTP, and those that bind KRas and inhibit its binding to its effectors; 2) Indirectly targeting KRas by inhibiting its prenylation with dual FT and GGT-1 inhibitors in human cancers that depend on mutant KRas as well as targeting downstream targets required for KRas transformation with GGT-1 inhibitors in human tumors that depend on geranylgeraylated proteins, 3) Understanding the mechanism by which mutant KRas suppresses p53, identifying novel druggable targets in this pathway and overcoming mt KRas dependency. This will include mechanistic studies as well as identifying signaling networks that mt KRas relies on to cause cancer with an emphasis on kinases whose suppression is synthetically lethal in tumors that depend on mt KRas for survival, 4) Discovering proteins that are expressed exclusively on the surface of human tumor cells that harbor mt KRas with the ultimate goal of developing tools to detect human tumors cells with KRas mutations, to follow treatment progress and to use the identified proteins as targets to design novel anti-cancer drugs. The proposed OIA research programs will result in significant discoveries that will lead to therapies that specifically target patients whose tumors harbor mutant KRas. This will contribute to overcoming the mutant KRas challenge that is of high priority and long term relevance to the mission of the NCI.

Public Health Relevance

The overall goal of this NCI R35 Outstanding Investigator Award (OIA) application is to discover novel anti- cancer drugs for human cancers where the mutant KRas protein causes cancer. It is well known that mutant K-Ras contributes significantly to human cancer pathogenesis and patient tumor resistance to therapy, yet there are no drugs against mutant KRas for cancer patients. This application proposes a comprehensive initiative with 4 innovative research programs focused on targeting mutant KRas and its signaling pathways to develop novel drugs that are specific for human tumors that depend on mutant KRas for survival. The discoveries from these 4 programs will contribute to overcoming the 'mutant KRas challenge' that is of high priority and long term relevance to the mission of the NCI.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Unknown (R35)
Project #
5R35CA197731-06
Application #
9852992
Study Section
Special Emphasis Panel (ZCA1)
Program Officer
Forry, Suzanne L
Project Start
2016-03-01
Project End
2023-05-31
Budget Start
2020-06-01
Budget End
2021-05-31
Support Year
6
Fiscal Year
2020
Total Cost
Indirect Cost
Name
Virginia Commonwealth University
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
105300446
City
Richmond
State
VA
Country
United States
Zip Code
23298
Carbone, Michele; Amelio, Ivano; Affar, El Bachir et al. (2018) Consensus report of the 8 and 9th Weinman Symposia on Gene x Environment Interaction in carcinogenesis: novel opportunities for precision medicine. Cell Death Differ 25:1885-1904
Kazi, Aslamuzzaman; Xiang, Shengyan; Yang, Hua et al. (2018) GSK3 suppression upregulates ?-catenin and c-Myc to abrogate KRas-dependent tumors. Nat Commun 9:5154
Kuchay, Shafi; Giorgi, Carlotta; Simoneschi, Daniele et al. (2017) PTEN counteracts FBXL2 to promote IP3R3- and Ca2+-mediated apoptosis limiting tumour growth. Nature 546:554-558
Cheemalapati, Surya Venkatasekhar; Winskas, John; Wang, Hao et al. (2016) Subcellular and in-vivo Nano-Endoscopy. Sci Rep 6:34400