Host tissue and immune microenvironment (IME)

The host tissue and immune microenvironment (IME) is a complex biological system comprising various cell types, including immune cells, fibroblasts, and endothelial cells, as well as the extracellular matrix and signaling molecules like cytokines [1][2]. It serves as the local landscape where immune responses are orchestrated and tissue homeostasis is maintained. In pathological conditions such as cancer or chronic inflammation, the IME is often remodeled into a suppressive or dysfunctional state that promotes disease progression and evades host defenses [3]. Although it is not a single molecular target, the IME is a primary focus of therapeutic intervention, where drugs are designed to modulate its components to restore an effective immune response [4]. Common therapeutic strategies include the use of checkpoint inhibitors to reactivate T cells or anti-angiogenic agents to normalize the vasculature within the microenvironment [5]. Understanding the spatial and cellular heterogeneity of this environment is crucial for predicting patient response to immunotherapy and developing next-generation precision medicines [2][4].

Other names

Immune microenvironmentTissue microenvironmentTumor microenvironmentTMELocal immune landscapeStroma

Modulation of the local cellular and chemical environment to restore normal tissue function or enhance anti-tumor immunity through checkpoint inhibition, cytokine neutralization, or inhibition of angiogenesis.