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  • Title: Expression and Cellular Localization of IFITM1 in Normal and Injured Rat Spinal Cords.
    Author: Wang Y, Lin YH, Wu Y, Yao ZF, Tang J, Shen L, Wang R, Ding SQ, Hu JG, Lü HZ.
    Journal: J Histochem Cytochem; 2018 Mar; 66(3):175-187. PubMed ID: 29300519.
    Abstract:
    Interferon-induced transmembrane protein 1 (IFITM1) is a member of the IFITM family that is associated with some acute-phase cytokine-stimulated response. Recently, we demonstrated that IFITM1 was significantly upregulated in the injured spinal cords at the mRNA level. However, its expression and cellular localization at the protein level is still unclear. Here, a rat model of spinal cord injury (SCI) was performed to investigate the spatio-temporal expression of IFITM1 after SCI. IFITM1 mRNA and protein were assessed by quantitative reverse transcription-PCR and western blot, respectively. IHC was used to identify its cellular localization. We revealed that IFITM1 could be found in sham-opened spinal cords and gradually increased after SCI. It reached peak at 7 and 14 days postinjury (dpi) and still maintained at a relatively higher level at 28 dpi. IHC showed that IFITM1 expressed in GFAP+ and APC+ cells in sham-opened spinal cords. After SCI, in addition to the above-mentioned cells, it could also be found in CD45+ and CD68+ cells, and its expression in CD45+, CD68+, and GFAP+ cells was increased significantly. These results demonstrate that IFITM1 is mainly expressed in astrocytes and oligodendroglia in normal spinal cords, and could rapidly increase in infiltrated leukocytes, activated microglia, and astrocytes after SCI.
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