U01CA274276

Stromal Modulation of Pancreatic Cancer Malignant Cell State and Therapeutic Sensitivity - Abstract

Unlike many cancers, pancreatic ductal adenocarcinoma (PDAC) is characterized by a hypoxic, nutrient-deprived, immunosuppressive tumor microenvironment (TME) and a fibrotic stroma that may impair treatment response. Recent single-cell studies suggest a complex interplay between malignant tumor cells and other cell types within the TME, with crosstalk between tumor and stromal cell types influencing malignant cell phenotypes, including responses to therapy.

Understanding these interactions will provide insight into PDAC progression and therapy resistance. In particular, cancer-associated fibroblasts (CAFs) are a major non-immune cell component of the TME and are comprised of several distinct subtypes that vary based on tumor subtype and the surrounding microenvironmental niche.

In this proposal, we bring together a multidisciplinary team of basic and translational investigators that will build upon our prior studies to investigate the tumor-TME co-organizer model with a focus on interrogating interactions between PDAC tumor cells and CAFs in the TME. Specifically, we will examine the overarching hypothesis that reciprocal signaling between tumor cells and CAFs shapes malignant cell and CAF phenotypes in a context-specific manner that can be modulated by prior therapy and the organ-specific niche.

We will leverage multiple built-in capabilities, including genetically engineered mouse models (GEMMs), patient-derived organoid (PDO) and matched fibroblast models, functional genetic screens, and clinical trials with serial biopsies to study the PDAC TME continuum in disease progression and resistance to therapy.

Specifically, we propose:

1. To determine whether targeting organ-specific PDAC-CAF interactions enhances therapeutic responses.
2. To interrogate novel vulnerabilities resulting from tumor cell and CAF reprogramming during PDAC therapy.
3. To investigate whether TGFB blockade disrupts tumor cell-CAF crosstalk and sensitizes PDAC to chemotherapy.

In pursuing these studies, we will work with other members of the PDAC Stromal Reprogramming Consortium (PSRC) to pursue collaborative studies to understand how PDAC and TME interactions program tumor progression and therapy responses.

Dana-Farber Cancer Institute

TO PROVIDE FUNDAMENTAL INFORMATION ON THE CAUSE AND NATURE OF CANCER IN PEOPLE, WITH THE EXPECTATION THAT THIS WILL RESULT IN BETTER METHODS OF PREVENTION, DETECTION AND DIAGNOSIS, AND TREATMENT OF NEOPLASTIC DISEASES. CANCER BIOLOGY RESEARCH INCLUDES THE FOLLOWING RESEARCH PROGRAMS: CANCER CELL BIOLOGY, CANCER IMMUNOLOGY, HEMATOLOGY AND ETIOLOGY, DNA AND CHROMOSOMAL ABERRATIONS, TUMOR BIOLOGY AND METASTASIS, AND STRUCTURAL BIOLOGY AND MOLECULAR APPLICATIONS.

93.396 - Cancer Biology Research

National Cancer Institute (NCI) [HHS - NIH]

Massachusetts United States

State-Wide

Pancreatic Ductal Adenocarcinoma (PDAC) Stromal Reprogramming Consortium (PSRC) (U01 Clinical Trial Not Allowed) (RFA-CA-21-041)

Amendment Since initial award the total obligations have increased 195% from $1,037,023 to $3,059,218.