Brain and behavior · 2026
Neuroplasticity-Driven Mechanisms and Therapeutic Targets in the Anterior Cingulate Cortex in Neuropathic Pain.
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Xiong Haibing, Li Letai, Li Yanlin, Chen Yutong, Leng Jiajie, Chen Tingting
Аннотация
BACKGROUND: Neuropathic pain is a chronic condition initiated by nerve injury and frequently accompanied by affective disturbances, including anxiety and depression. Growing evidence suggests that maladaptive neuroplasticity in the anterior cingulate cortex (ACC) contributes to the persistence and affective dimension of neuropathic pain.
OBJECTIVE: To narratively review and critically synthesize current evidence on ACC-related neuroplasticity in neuropathic pain across molecular, circuit, glial, and translational domains.
METHODS: We narratively reviewed experimental and clinical studies addressing ACC-related molecular signaling, synaptic and circuit remodeling, glial and neuroimmune mechanisms, and interventional approaches relevant to neuropathic pain and its affective dimension.
RESULTS: At the molecular level, abnormal ACC synaptic plasticity has been associated with long-term potentiation involving N-methyl-D-aspartate (NMDA) receptors-particularly GluN2B-dependent signaling-while the brain-derived neurotrophic factor (BDNF)-TrkB axis may further contribute to dendritic remodeling and maladaptive synaptic strengthening. At the circuit level, the ACC interacts with limbic regions including the insula and amygdala, within distributed networks that appear to contribute to aversive learning and pain-related affect. At the non-neuronal level, alterations in the ACC microenvironment include astrocyte-linked neuroinflammation and microglia-associated synaptic remodeling, which may shift excitation-inhibition balance. Therapeutically, ACC-targeted strategies are evolving from broad pharmacological modulation toward more spatially specific neuromodulation, although major translational challenges remain, including limited target specificity, cross-species differences, and uncertain causal inference in humans.
CONCLUSIONS: ACC-related neuroplasticity appears to be an important component of neuropathic pain-affect pathophysiology. Future progress will depend on integrating mechanistic insights with network-level interpretation and improving the precision and clinical translatability of ACC-engaging interventions.
OBJECTIVE: To narratively review and critically synthesize current evidence on ACC-related neuroplasticity in neuropathic pain across molecular, circuit, glial, and translational domains.
METHODS: We narratively reviewed experimental and clinical studies addressing ACC-related molecular signaling, synaptic and circuit remodeling, glial and neuroimmune mechanisms, and interventional approaches relevant to neuropathic pain and its affective dimension.
RESULTS: At the molecular level, abnormal ACC synaptic plasticity has been associated with long-term potentiation involving N-methyl-D-aspartate (NMDA) receptors-particularly GluN2B-dependent signaling-while the brain-derived neurotrophic factor (BDNF)-TrkB axis may further contribute to dendritic remodeling and maladaptive synaptic strengthening. At the circuit level, the ACC interacts with limbic regions including the insula and amygdala, within distributed networks that appear to contribute to aversive learning and pain-related affect. At the non-neuronal level, alterations in the ACC microenvironment include astrocyte-linked neuroinflammation and microglia-associated synaptic remodeling, which may shift excitation-inhibition balance. Therapeutically, ACC-targeted strategies are evolving from broad pharmacological modulation toward more spatially specific neuromodulation, although major translational challenges remain, including limited target specificity, cross-species differences, and uncertain causal inference in humans.
CONCLUSIONS: ACC-related neuroplasticity appears to be an important component of neuropathic pain-affect pathophysiology. Future progress will depend on integrating mechanistic insights with network-level interpretation and improving the precision and clinical translatability of ACC-engaging interventions.