This proposal aims to apply an imaging technique for three-dimensional (3D) visualization and mapping of the tumor and microenvironment including cancer cells, stromal cells, immune cells, and vascular cells. The capability to determine the location, density, and functional orientation of different cell populations throughout a tumor would be a powerful tool not only for cancer biology but also for improving diagnosis and advancing the development of effective therapies. Although immunohistochemistry (IHC)/immunofluorescence (IF) staining has long been used in cancer diagnostics, conventional IHC/IF methodology is based on localization of antigens in single thin sections. Considering that most cells in the field of view may be only fragments, interpretation of thin section staining is subject to multiple artifacts. Significantly, IHC/IF may fail to demonstrate important features such as pushing margin, lymphocytic infiltrate, or squamous change, leaving room for diagnostic and therapeutic uncertainties. Recent progress in tissue optical clearing and light microscopy enable 3D fluorescent imaging of normally opaque, thick tissues and organs. Dramatic examples include progress mapping neuronal connectivity in whole rodent brains at subcellular resolution. I sought to adapt these strategies to advance analysis of inflammatory infiltrates, drug delivery, and therapeutic responses in whole mouse tumors and human tumor biopsies. In order to advance 3D tumor imaging, I optimized optical clearing, cell staining, high resolution imaging, and computational reconstruction. Eventually, I developed a 3D tumor imaging method, Transparent Tumor Tomography (T3), as a tool to visualize and map tumors at single cell resolution. In this project, I will apply T3 for spatial analysis of tumor immunology and immunotherapy. T3-mediated 3D tumor imaging will provide integrated spatial information regarding antibody drug distribution and immune contexts in whole tumors which will be useful as a new assay tool for cancer immunotherapy research.

Public Health Relevance

At the completion of this project, I hope to have established the Transparent Tumor Tomography (T3) platform for efficient and reliable tumor analysis. Immediately, this offers a powerful tool for tumor biology and immune-oncology by providing comprehensive 3D tumor information with multiple antigens labeled at single-cell resolution. Looking forward, this method has the potential to be integrated into clinical practice, and offers a path to preventing misdiagnoses by providing improved tumor analysis. With this new method, pathologists and oncologists could match each tumor to the most appropriate immunotherapy and then determine patient benefit.

Agency
National Institute of Health (NIH)
Institute
National Institute of Biomedical Imaging and Bioengineering (NIBIB)
Type
Research Transition Award (R00)
Project #
5R00EB022636-04
Application #
9886247
Study Section
Special Emphasis Panel (NSS)
Program Officer
King, Randy Lee
Project Start
2017-05-10
Project End
2022-04-30
Budget Start
2020-05-01
Budget End
2021-04-30
Support Year
4
Fiscal Year
2020
Total Cost
Indirect Cost
Name
University of Illinois at Chicago
Department
Pharmacology
Type
Schools of Pharmacy
DUNS #
098987217
City
Chicago
State
IL
Country
United States
Zip Code
60612