PMID- 34572376 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20211001 IS - 2227-9059 (Print) IS - 2227-9059 (Electronic) IS - 2227-9059 (Linking) VI - 9 IP - 9 DP - 2021 Sep 10 TI - Fumagillin Attenuates Spinal Angiogenesis, Neuroinflammation, and Pain in Neuropathic Rats after Chronic Constriction Injury. LID - 10.3390/biomedicines9091187 [doi] LID - 1187 AB - INTRODUCTION: Angiogenesis in the central nervous system is visible in animal models of neuroinflammation and bone cancer pain. However, whether spinal angiogenesis exists and contributes to central sensitization in neuropathic pain remains unclear. This study analyzes the impact of angiogenesis on spinal neuroinflammation in neuropathic pain. METHODS: Rats with chronic constriction injury (CCI) to the sciatic nerve underwent the implantation of an intrathecal catheter. Fumagillin or vascular endothelial growth factor-A antibody (anti-VEGF-A) was administered intrathecally. Nociceptive behaviors, cytokine immunoassay, Western blot, and immunohistochemical analysis assessed the effect of angiogenesis inhibition on CCI-induced neuropathic pain. RESULTS: VEGF, cluster of differentiation 31 (CD31), and von Willebrand factor (vWF) expressions increased after CCI in the ipsilateral lumbar spinal cord compared to that in the contralateral side of CCI and control rats from post-operative day (POD) 7 to 28, with a peak at POD 14. Tumor necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta), and IL-6 concentrations, but not IL-10 levels, also increased in the ipsilateral spinal cord after CCI. Fumagillin and anti-VEGF-A reduced CCI-induced thermal hyperalgesia from POD 5 to 14 and mechanical allodynia from POD 3 to 14. Fumagillin reduced CCI-upregulated expressions of angiogenic factors and astrocytes. Furthermore, fumagillin decreased TNF-alpha and IL-6 amounts and increased IL-10 levels at POD 7 and 14, but not IL-1beta concentrations. CONCLUSIONS: Fumagillin significantly ameliorates CCI-induced nociceptive sensitization, spinal angiogenesis, and astrocyte activation. Our results suggest that angiogenesis inhibitor treatment suppresses peripheral neuropathy-induced central angiogenesis, neuroinflammation, astrocyte activation, and neuropathic pain. FAU - Wen, Zhi-Hong AU - Wen ZH AUID- ORCID: 0000-0003-4411-044X AD - Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804201, Taiwan. AD - Institute of BioPharmaceutical Sciences, National Sun Yat-sen University, Kaohsiung 804201, Taiwan. FAU - Huang, Shi-Ying AU - Huang SY AUID- ORCID: 0000-0002-0370-1553 AD - College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China. FAU - Kuo, Hsiao-Mei AU - Kuo HM AUID- ORCID: 0000-0001-5749-7757 AD - Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804201, Taiwan. AD - Center for Neuroscience, National Sun Yat-sen University, Kaohsiung 804201, Taiwan. FAU - Chen, Chao-Ting AU - Chen CT AD - Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804201, Taiwan. FAU - Chen, Nan-Fu AU - Chen NF AD - Department of Surgery, Division of Neurosurgery, Kaohsiung Armed Forces General Hospital, Kaohsiung 802301, Taiwan. AD - Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 804201, Taiwan. FAU - Chen, Wu-Fu AU - Chen WF AD - Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804201, Taiwan. AD - Department of Neurosurgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan. FAU - Tsui, Kuan-Hao AU - Tsui KH AD - Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung 813414, Taiwan. AD - Institute of Clinical Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan. FAU - Liu, Hsin-Tzu AU - Liu HT AD - Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970473, Taiwan. FAU - Sung, Chun-Sung AU - Sung CS AD - Department of Anesthesiology, Division of Pain Management, Taipei Veterans General Hospital, Taipei 112201, Taiwan. AD - School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan. LA - eng GR - MOST 105-2314-B-075-011-MY2 and MOST 109-2314-B-075-045-MY3/Ministry of Science and Technology, Taiwan/ PT - Journal Article DEP - 20210910 PL - Switzerland TA - Biomedicines JT - Biomedicines JID - 101691304 PMC - PMC8470034 OTO - NOTNLM OT - angiogenesis OT - astrocytes OT - fumagillin OT - neuroinflammation OT - neuropathic pain COIS- The authors have no conflict of interest to declare. EDAT- 2021/09/29 06:00 MHDA- 2021/09/29 06:01 PMCR- 2021/09/10 CRDT- 2021/09/28 01:05 PHST- 2021/07/30 00:00 [received] PHST- 2021/08/26 00:00 [revised] PHST- 2021/09/07 00:00 [accepted] PHST- 2021/09/28 01:05 [entrez] PHST- 2021/09/29 06:00 [pubmed] PHST- 2021/09/29 06:01 [medline] PHST- 2021/09/10 00:00 [pmc-release] AID - biomedicines9091187 [pii] AID - biomedicines-09-01187 [pii] AID - 10.3390/biomedicines9091187 [doi] PST - epublish SO - Biomedicines. 2021 Sep 10;9(9):1187. doi: 10.3390/biomedicines9091187.