Multiple immune and stromal cell populations

The term Multiple immune and stromal cell populations refers to the complex and heterogeneous assembly of various cell types within a tissue, most commonly discussed in the context of the tumor microenvironment (TME). Immune populations include T cells, B cells, natural killer cells, and myeloid-derived cells, while stromal populations consist of fibroblasts, endothelial cells, and pericytes (Binnewies et al., 2018, Nature Medicine). These cells interact through a dense network of cytokines, chemokines, and direct cell-cell contacts to regulate processes such as inflammation, angiogenesis, and immune evasion (NCI Dictionary of Cancer Terms, 2024). In many diseases, particularly cancer, the balance between these populations determines the rate of progression and the patient's response to therapy. However, because this term describes a broad biological system rather than a specific protein, enzyme, or receptor, it is not considered a discrete therapeutic target in the traditional pharmacological sense. Instead, it represents the multicellular environment where specific molecular targets, such as PD-1 or VEGF, are expressed and modulated.

Other names

Tumor microenvironmentTMEStromal-immune nicheMulticellular ecosystemTumor immune microenvironmentTIME

Not applicable as this refers to a heterogeneous collection of cell types rather than a single molecular entity.