Macrophage polarization alteration

**Macrophage polarization alteration** refers to the process by which macrophages change or shift their functional phenotype in response to environmental stimuli, commonly classified as M1 (pro-inflammatory/classically activated) and M2 (anti-inflammatory/alternatively activated) phenotypes[3][6]. This process is controlled by a complex network of extracellular signals (e.g., cytokines, growth factors), ligand-receptor interactions (e.g., IFN-γ with its receptor for M1, IL-4/IL-13 with their receptor for M2), intracellular signaling pathways (JAK/STAT, NF-κB, PI3K/AKT), and transcriptional as well as epigenetic regulation[2][6][5][1]. Altered or imbalanced macrophage polarization is implicated in a wide array of diseases. Enhanced M1 polarization is associated with persistent inflammation and tissue damage (as seen in autoimmune disease, atherosclerosis, obesity), whereas excess M2 polarization is linked to tissue fibrosis, tumor progression, and impaired immune responses[1][3][6]. Macrophage polarization alteration is not a molecule or receptor, but a description of a dynamic cellular process involving many molecular actors. Therefore, it is not a conventional therapeutic target like a receptor, enzyme, or ion channel, but rather a biological phenomenon involving multiple upstream and downstream molecular targets[3][7]. **Caveat:** "Macrophage polarization alteration" is not a molecular entity, receptor, or canonical drug target. It describes a cellular process or state. While various receptors and signaling molecules (GM-CSFR, IFNGR, IL-4R, STATs, NF-κB, PPARγ, etc.) control macrophage polarization and are considered drug targets, the term itself is not a standardized or specific nomenclature for any therapeutic target[3][6][2][1]. Thus, is_incorrect: true applies—the entry describes a biological process, not a targetable molecule/receptor, and cannot be canonically mapped as requested.

Other names

Macrophage polarizationM1–M2 macrophage polarizationMacrophage phenotype switching