Various immune cells and tissue-resident cells

The term 'Various immune cells and tissue-resident cells' refers to a heterogeneous collection of biological units rather than a specific molecular therapeutic target. Immune cells include leukocytes such as T cells, B cells, myeloid cells, and natural killer cells, which are essential for pathogen defense and immune surveillance (NIH NCI Dictionary). Tissue-resident cells encompass specialized immune subsets, such as alveolar macrophages or microglia, as well as non-immune stromal cells like fibroblasts and endothelial cells that provide structural and metabolic support (Nature Reviews Immunology, 2018). These cells collectively orchestrate the body's defense against pathogens, maintain tissue homeostasis, and play central roles in the pathogenesis of inflammatory, autoimmune, and neoplastic diseases (PubMed, PMID: 29717233). In the context of pharmacology, these cells are often the site of action for broad-spectrum immunosuppressants or anti-inflammatory agents like corticosteroids. However, because this term describes a broad cellular environment rather than a specific protein, it does not meet the criteria for a canonical molecular target. Therapeutic strategies typically aim at specific receptors or signaling molecules expressed by these cells to achieve precision in treating diseases like cancer or autoimmunity. Consequently, this entry is considered 'incorrect' as a target definition because it lacks molecular specificity and encompasses a vast array of distinct biological pathways.

Other names

Immune cell populationsTissue-resident immune cellsLeukocytesStromal and immune cell environmentPeripheral blood mononuclear cells (PBMCs)

Drugs interacting with these cells typically function through broad-spectrum modulation of intracellular signaling pathways, such as the inhibition of NF-kappaB or calcineurin, or by inducing apoptosis in rapidly dividing cell populations (StatPearls, 2023).