中国神经再生研究(英文版) ›› 2023, Vol. 18 ›› Issue (10): 2260-2267.doi: 10.4103/1673-5374.369119

• 原著:脊髓损伤修复保护与再生 • 上一篇    下一篇

一种新型肽VD11可促进脊髓损伤后的结构和功能恢复

  


  • 出版日期:2023-10-15 发布日期:2023-03-28
  • 基金资助:
    国家自然科学基金项目(32060212,81760648,81560118);云南省应用基础研究项目-昆明医科大学联合基金项目(202101AY070001-006,2018FE001(-161));云南省应用基础研究项目(2019FB128);云南省慢性肾脏病临床研究中心项目(202102AA10060);云南省教育厅科学研究基金项目(2021J0205)

A new peptide, VD11, promotes structural and functional recovery after spinal cord injury

Shan-Shan Li1, #, Bai-Yu Zhang3, 4, #, Sai-Ge Yin1, Zi-Qi Wei1, Nai-Xin Liu1, Yi-Lin Li1, Si-Yu Wang1, Yu-Heng Shi1, Jian Zhao1, Li-Juan Wang1, Yue Zhang1, Jun Sun1, *, Ying Wang2, *, Xin-Wang Yang1, *#br#   

  1. 1Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan Province, China; 2Key Laboratory of Chemistry in Ethnic Medicinal Resources & Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission & Ministry of Education, School of Ethnic Medicine, Yunnan Minzu University, Kunming, Yunnan Province, China; 3Department of Urology, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, China; 4Yunnan Province Clinical Research Center for Chronic Kidney Disease, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan Province, China
  • Online:2023-10-15 Published:2023-03-28
  • Contact: Xin-Wang Yang, PhD, yangxinwanghp@163.com or yangxinwang@kmmu.edu.cn; Ying Wang, PhD, wangying_814@163.com; Jun Sun, BS, sunjun6661@126.com.
  • Supported by:
    This work was supported by the National Natural Science Foundation of China, Nos. 32060212 (to YW), 81760648 (to XWY), 81560118 (to BYZ); Project of Yunnan Applied Basic Research Project-Kunming Medical University Union Foundation, Nos. 202101AY070001-006 (to XWY) and 2018FE001 (-161) (to JS); Yunnan Applied Basic Research Project Foundation, No. 2019FB128 (to YW); Project of Yunnan Province Clinical Research Center for Chronic Kidney Disease, No. 202102AA10060 (to BYZ); a grant from Scientific Research Foundation of Department of Education of Yunnan Province, No. 2021J0205 (to SSL). 

摘要:

由于中枢神经系统再生能力非常有限,且对脊髓损伤有效的治疗方法很少,因此寻找促脊髓损伤后结构和功能恢复的药物先导分子具有重要的意义。有研究显示,多肽可显著地促损伤组织修复和再生,且由于两栖动物的脊髓再生能力很强,但目前少有研究探讨两栖动物脊髓来源的多肽对脊髓损伤的影响。因此此次实验首次从中国特有两栖动物花臭蛙脊髓中成功分离鉴定一种新型多肽—VD11(氨基酸序列为VDELWPPWLPC)。体外实验表明,VD11可促进脂多糖诱导BV2细胞中神经生长因子和脑源性神经营养因子的分泌以及缺氧损伤PC12细胞的增殖和突触延长。体内实验表明,椎管内注射VD11可明显促进脊髓损伤大鼠运动功能的恢复,减轻其病理损伤,并促进轴突的再生。进一步RNA测序和蛋白质印迹结果显示,其作用可能与AMPK和AKT信号通路的激活相关。综上,实验成功发现了一种新型两栖动物来源肽VD11,可促进脊髓损伤后结构和功能的恢复。

https://orcid.org/0000-0003-3210-8908 (Xin-Wang Yang); https://orcid.org/0000-0002-0983-4365 (Ying Wang); 

https://orcid.org/0000-0003-4799-6717 (Jun Sun)

关键词: 两栖生物, 活性肽, 脊髓损伤, 运动功能, 轴突再生, 神经保护, 神经生长因子, 脑源性神经营养因子, AMPK, Akt, 缺血再灌注损伤

Abstract: The regenerative capacity of the central nervous system is very limited and few effective treatments are currently available for spinal cord injury. It is therefore a priority to develop new drugs that can promote structural and functional recovery after spinal cord injury. Previous studies have shown that peptides can promote substantial repair and regeneration of injured tissue. While amphibians have a pronounced ability to regenerate the spinal cord, few studies have investigated the effect of amphibian spinal cord-derived peptides on spinal cord injury. Here we report for the first time the successful identification and isolation of a new polypeptide, VD11 (amino acid sequence: VDELWPPWLPC), from the spinal cord of an endemic Chinese amphibian (Odorrana schmackeri). In vitro experiments showed that VD11 promoted the secretion of nerve growth factor and brain-derived neurotrophic factor in BV2 cells stimulated with lipopolysaccharide, as well as the proliferation and synaptic elongation of PC12 cells subjected to hypoxia. In vivo experiments showed that intravertebral injection of VD11 markedly promoted recovery of motor function in rats with spinal cord injury, alleviated pathological damage, and promoted axonal regeneration. Furthermore, RNA sequencing and western blotting showed that VD11 may affect spinal cord injury through activation of the AMPK and AKT signaling pathways. In summary, we discovered a novel amphibian-derived peptide that promotes structural and functional recovery after spinal cord injury. 

Key words: Akt signaling pathway, amphibian-derived bioactive peptide, AMPK signaling pathway, axonal regeneration, brain-derived neurotrophic factor, ischemia/reperfusion injury, motor function, nerve growth factor, neuroprotective effect, spinal cord injury