journal article Jan 10, 2023

Basolateral amygdala astrocytes modulate diabetic neuropathic pain and may be a potential therapeutic target for koumine

British Journal of Pharmacology Vol. 180 No. 10 pp. 1408-1428 · Wiley
View at Publisher Save 10.1111/bph.16011
Abstract
Background and PurposeNew remedies are required for the treatment of diabetic neuropathic pain (DNP) due to insufficient efficacy of available therapies. Here, we used chemogenetic approaches combined with in vivo pharmacology to elucidate the role of basolateral amygdala (BLA) astrocytes in DNP pathogenesis and provide new insights into therapeutic strategies for DNP.Experimental ApproachA streptozotocin‐induced DNP model was established. Designer receptors exclusively activated by designer drugs (DREADDs) were used to regulate astrocyte activity. Mechanical hyperalgesia was assessed using the electronic von Frey test. Anxiety‐like behaviours were detected using open field and elevated plus maze tests. Astrocytic activity was detected by immunofluorescence, and cytokine content was determined by ELISA.Key ResultsBLA astrocytes were regulated by DREADDs, and inhibition of BLA astrocytes attenuated mechanical allodynia and pain‐related negative emotions in DNP rats. In contrast, temporary activation of BLA astrocytes induced allodynia without anxious behaviours in naive rats. In addition, koumine (KM) alleviated mechanical allodynia and anxiety‐like behaviours in DNP rats, inhibited the activation of BLA astrocytes and suppressed the inflammatory response. Furthermore, persistent activation of BLA astrocytes through chemogenetics mimicked chronic pain, and KM alleviated the pain hypersensitivity and anxiety‐like behaviours.Conclusion and ImplicationsDREADDs bidirectionally regulate the activity of BLA astrocytes, which proves for the first time the role of BLA astrocyte activation in the pathogenesis of DNP and represents a novel therapeutic strategy for DNP. KM ameliorates DNP, perhaps by inhibiting the activation of BLA astrocytes and reveal KM as a potential candidate for treating DNP.
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Details
Published
Jan 10, 2023
Vol/Issue
180(10)
Pages
1408-1428
License
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Authors
Funding
National Natural Science Foundation of China Award: 81973309
Cite This Article
Jing‐Shan Lu, Lan Yang, Jian Chen, et al. (2023). Basolateral amygdala astrocytes modulate diabetic neuropathic pain and may be a potential therapeutic target for koumine. British Journal of Pharmacology, 180(10), 1408-1428. https://doi.org/10.1111/bph.16011
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