Deconstructing tumor heterogeneity: the stromal perspective

Area of Science:

• Oncology
• Cancer Biology
• Tumor Microenvironment

Background:

• Immune cells' role in tumor progression is known, but non-immune stromal components remain poorly understood.
• Stromal elements significantly influence tumor heterogeneity, initiation, progression, and therapeutic resistance.

Purpose of the Study:

• To highlight and integrate the functions of non-immune stromal components in regulating tumor heterogeneity.
• To explore the dual roles of tumor-supportive versus tumor-suppressive stroma.
• To identify challenges and knowledge gaps regarding the tumor microenvironment.

Main Methods:

• NCI-sponsored workshop integrating diverse research perspectives.
• Discussions on cellular composition, function, and spatial geography of the tumor microenvironment.
• Exploration of prognostic and therapeutic implications of stromal elements.

Main Results:

• Non-immune stromal components critically regulate tumor heterogeneity.
• Stromal composition and function can change during disease progression, influencing tumor behavior.
• Microenvironment and spatial factors dictate lesion aggressiveness and therapeutic response.

Conclusions:

• Further research is needed to define the roles of non-immune stromal cells in cancer.
• Understanding the tumor microenvironment is crucial for developing effective cancer therapies.
• Identifying vulnerabilities within the heterogeneous tumor microenvironment presents therapeutic opportunities.