Cingulate thrombospondin 4 protects against neuropathic pain and comorbid anxiodepression via interaction with EAAT2.

Cingulate thrombospondin 4 (THBS4) is downregulated after peripheral neuropathy and its overexpression alleviates pain hypersensitivity and anxiodepression in the ACC.

• Why it matters: Understanding extracellular mechanisms that trigger intracellular plasticity in the anterior cingulate cortex is crucial for addressing neuropathic pain and associated emotional disorders, which are often linked in patients.
• What they did: The study analyzed THBS4 levels in the ACC following peripheral neuropathy and used overexpression techniques to assess its effects, revealing that THBS4 regulates glutamate homeostasis through EAAT2 in astrocytes.
• The result: THBS4 maintains glutamate balance, stabilizes neuronal plasticity, and produces analgesic, anxiolytic, and antidepressive effects, suggesting recombinant THBS4 as a potential therapy for neuropathic pain and anxiodepression.