Abstract:
:Spinal cord injury (SCI) is considered to be primarily associated with loss of motor function and leads to the activation of diverse cellular mechanisms in the central nervous system to attempt to repair the damaged spinal cord tissue. Higenamine (HG) (1-[(4-hydroxyphenyl) methyl]-1,2,3,4-tetrahydroisoquinoline-6,7-diol), an active ingredient of Aconiti Lateralis Radix Praeparata, has been traditionally used as a heart stimulant and anti-inflammatory agent in oriental countries. However, the function and related mechanism of HG on SCI have never been investigated. In our current study, HG treatment displayed increased myelin sparring and enhanced spinal cord repair process. The numbers of CD4(+) T cells, CD8(+) T cells, Ly6G(+) neutrophils and CD11b(+) macrophages were all significantly lower in the HG-treated group than that in the control group after SCI. HG administration increased the expression of IL-4 and IL-10 and promoted M2 macrophage activation. Significantly reduced Hmgb1 expression was also observed in HG-treated mice with SCI. Furthermore, HG treatment promoted HO-1 production. The increased number of M2 macrophages, decreased expression of Hmgb1 and promoted locomotor recovery induced by HG were all reversed with additional HO-1 inhibitor treatment. In conclusion, HG promotes M2 macrophage activation and reduces Hmgb1 expression dependent on HO-1 induction and then promotes locomotor function after SCI.
journal_name
Int Immunopharmacoljournal_title
International immunopharmacologyauthors
Zhang Z,Li M,Wang Y,Wu J,Li Jdoi
10.1016/j.intimp.2014.10.022subject
Has Abstractpub_date
2014-12-01 00:00:00pages
681-7issue
2eissn
1567-5769issn
1878-1705pii
S1567-5769(14)00404-4journal_volume
23pub_type
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