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质谱成像揭示脊髓损伤后灰质和白质中的代谢物变化。

mass spectrometry imaging reveals metabolite alterations in gray and white matter after spinal cord injury.

作者信息

Lyu Chenghao, Tang Yujing, Shang Fei-Fei

机构信息

International Medical College and College of Basic Medicine, Chongqing Medical University, Chongqing 400016, P.R. China.

College of Medical Laboratory Science and Technology, Harbin Medical University, Daqing, Heilongjiang 163319, P.R. China.

出版信息

Exp Ther Med. 2025 Apr 11;29(6):117. doi: 10.3892/etm.2025.12867. eCollection 2025 Jun.

Abstract

It is known that spinal cord injury (SCI) causes metabolic disorders, such as disrupted lipid and amino acid metabolism. However, the changes of metabolites in the spinal cord remain elusive. In the present study, adult Sprague-Dawley rats underwent spinal cord transection surgery. Ambient air flow-assisted desorption electrospray ionization mass spectrometry imaging was performed to identify the localization of metabolites in the white and gray matter and the ventral and dorsal horns within the spinal cord sections. The results revealed that 42 metabolites were specifically increased in the gray matter, and 90 metabolites were increased in the white matter compared with that in the sham group. In the ventral and dorsal horns, 86 and 103 metabolites, respectively, exhibited specific increases after injury. By contrast, numerous metabolites, especially lipids, were significantly decreased after SCI. Phosphatidylserine and phosphatidylethanolamine were mainly decreased in the gray matter, while cholesterol and ceramide were mainly decreased in the white matter. Specifically, phosphatidylethanolamine was detected at low levels in the dorsal horn following injury. However, the phosphatidylserine level decreased in the ventral horn. The functional enrichment of these metabolites via Kyoto Encyclopedia of Genes and Genomes analysis further confirmed the profile differences in the white and gray matter, as well as in the ventral and dorsal horns after SCI. These results provide valuable information on the metabolite profiles across various anatomical regions of the spinal cord following SCI, which may support the development of precise treatment strategies for patients.

摘要

众所周知,脊髓损伤(SCI)会导致代谢紊乱,如脂质和氨基酸代谢紊乱。然而,脊髓中代谢物的变化仍不清楚。在本研究中,成年Sprague-Dawley大鼠接受了脊髓横断手术。采用环境气流辅助解吸电喷雾电离质谱成像技术,以确定脊髓切片中白质和灰质以及腹角和背角中代谢物的定位。结果显示,与假手术组相比,灰质中有42种代谢物特异性增加,白质中有90种代谢物增加。在腹角和背角中,分别有86种和103种代谢物在损伤后呈现特异性增加。相比之下,脊髓损伤后大量代谢物,尤其是脂质,显著减少。磷脂酰丝氨酸和磷脂酰乙醇胺主要在灰质中减少,而胆固醇和神经酰胺主要在白质中减少。具体而言,损伤后在背角中检测到低水平的磷脂酰乙醇胺。然而,腹角中的磷脂酰丝氨酸水平降低。通过京都基因与基因组百科全书分析对这些代谢物进行功能富集,进一步证实了脊髓损伤后白质和灰质以及腹角和背角中的特征差异。这些结果为脊髓损伤后脊髓各个解剖区域的代谢物谱提供了有价值的信息,这可能有助于为患者制定精确的治疗策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e4cd/12035510/d9a393dd055b/etm-29-06-12867-g00.jpg

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