Neuroinflammatory and neurotrophic pathways

Neuroinflammatory and neurotrophic pathways encompass the complex bidirectional communication between the central nervous system's immune cells and signaling molecules that regulate neuronal health and survival (Skaper et al., 2018, CNS & Neurological Disorders - Drug Targets). Neuroinflammation is primarily mediated by microglia and astrocytes which, when activated, release pro-inflammatory cytokines like TNF-alpha and IL-1 beta that can lead to neurodegeneration if the response becomes chronic (StatPearls, Neuroinflammation). Conversely, neurotrophic pathways involve growth factors such as brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) that are essential for neuronal differentiation, synaptic plasticity, and survival (Huang & Reichardt, 2001, Annual Review of Neuroscience). In many pathological conditions, such as Alzheimer's disease and major depression, a shift occurs where chronic inflammation suppresses neurotrophic support, creating a cycle of neuronal decline. Therapeutic strategies targeting these pathways aim to either inhibit harmful inflammatory mediators or bolster neurotrophic signaling to preserve brain function and promote repair. Because this term describes a broad set of biological processes rather than a single molecular entity, it is classified as a pathway rather than a specific therapeutic target.

Other names

Neuroinflammation-neurotrophin axisNeuroimmune-neurotrophic signalingNeurotrophic-neuroinflammatory crosstalk

Modulation of neuroinflammatory cytokines (e.g., TNF-alpha, IL-1 beta) and enhancement of neurotrophic factor signaling (e.g., BDNF, NGF) to promote neuronal survival, reduce microglial activation, and restore synaptic homeostasis.