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Oncotarget. 2017 Jan 10;8(2):2719-2730. doi: 10.18632/oncotarget.13739.

Macrophage migration inhibitory factor activates inflammatory responses of astrocytes through interaction with CD74 receptor.

Author information

1
Key Laboratory of Neuroregeneration, Ministry of Education and Jiangsu Province, Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226001, PR China.
2
Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong 226001, PR China.

Abstract

Astrocytes, the major glial cell population of the central nervous system (CNS), play important physiological roles related to CNS homeostasis. Growing evidence demonstrates that astrocytes trigger innate immune responses under challenge of a variety of proinflammatory cytokines. Macrophage migration inhibitory factor (MIF), a proinflammatory cytokine mainly secreted from monocytes/macrophages, is involved in inflammation-associated pathophysiology. Here, we displayed that expression of MIF significantly increased following spinal cord injury, in colocalization with microglia and astrocytes. MIF elicited inflammatory responses of astrocytes via activation of CD74 receptor and extracellular signal-related kinase (ERK) pathway. Transcriptome analysis revealed that inflammation-related factors cholesterol 25-hydroxylase (Ch25h) and phospholipase A2-IIA (Pla2g2a), downstream of MIF/CD74 axis, were potentially implicated in the mediating inflammatory response of astrocytes. Our results provided a new target for interference of CNS inflammation after insults.

KEYWORDS:

CD74; MIF; astrocyte; inflammation; spinal cord

PMID:
27926507
PMCID:
PMC5356836
DOI:
10.18632/oncotarget.13739
[Indexed for MEDLINE]
Free PMC Article

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