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자료유형
학술저널
저자정보
Yaqun Li (Chonnam National University Medical School) Woong Mo Kim (Chonnam National University Medical School) Seung Hoon Kim (Chonnam National University Medical School) Hyun Eung You (Chonnam National University Hwasun Hospital) Dong Ho Kang (Chonnam National University Medical School) Hyung Gon Lee (Chonnam National University Medical School) Jeong Il Choi (Chonnam National University Medical School) Myung Ha Yoon (Chonnam National University Medical School)
저널정보
대한통증학회 The Korean Journal of Pain The Korean Journal of Pain 제34권 제1호
발행연도
2021.1
수록면
27 - 34 (8page)

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Background: Chemotherapy-induced peripheral neuropathy (CIPN) is a major reason for stopping or changing anticancer therapy. Among the proposed pathomechanisms underlying CIPN, proinflammatory processes have attracted increasing attention. Here we assessed the role of prostaglandin D2 (PGD2) signaling in cisplatininduced neuropathic pain. Methods: CIPN was induced by intraperitoneal administration of cisplatin 2 mg/kg for 4 consecutive days using adult male Sprague-Dawley rats. PGD2 receptor DP1 and/or DP2 antagonists were administered intrathecally and the paw withdrawal thresholds were measured using von Frey filaments. Spinal expression of DP1, DP2, hematopoietic PGD synthase (H-PGDS), and lipocalin PGD synthase (L-PGDS) proteins were analyzed by western blotting. Results: The DP1 and DP2 antagonist AMG 853 and the selective DP2 antagonist CAY10471, but not the DP1 antagonist MK0524, significantly increased the paw withdrawal threshold compared to vehicle controls (P = 0.004 and P < 0.001, respectively). Western blotting analyses revealed comparable protein expression levels in DP1 and DP2 in the spinal cord. In the CIPN group the protein expression level of L-PGDS, but not of H-PGDS, was significantly increased compared to the control group (P < 0.001). Conclusions: The findings presented here indicate that enhanced PGD2 signaling, via upregulation of L-PGDS in the spinal cord, contributes to mechanical allodynia via DP2 receptors in a cisplatin-induced neuropathic pain model in rats, and that a blockade of DP2 receptor activation may present a novel therapeutic target for managing CIPN.

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