Sema4D knockdown in oligodendrocytes promotes functional recovery after spinal cord injury.

Abstract:

:Semaphorin4D (Sema4D) belongs to Semaphorins family and is secreted and membrane-bound protein. Its function on angiogenesis and axon regeneration makes it an ideal therapeutic target for spinal cord injury (SCI). Here we examined Sema4D expression profile by real-time PCR and western blot and found Sema4D was upregulated after SCI. In vitro study showed Sema4D was not only expressed in oligodendrocytes but also in endothelial cells (ECs). Hypoxia can mimic Sema4D upregulation in both cell lines. Moreover, overexpression of Sema4D through lentivirus in ECs promoted tube formation. However, Sema4D overexpression in oligodendrocytes precursor cells (OPCs) inhibited neuron myelination in neuron-oligodendrocyte co-culture system. Therefore, Sema4D knockdown in OPCs was applied in SCI rats. The results indicated that Sema4D knockdown significantly promoted functional recovery with blood-brain barrier score. Taken together, our data suggest that specific Sema4D knockdown in oligodendrocytes without disturbing its angiogenesis effect can be a beneficial strategy for SCI treatment.

journal_name

Cell Biochem Biophys

authors

Zhang HL,Wang J,Tang L

doi

10.1007/s12013-013-9727-0

subject

Has Abstract

pub_date

2014-04-01 00:00:00

pages

489-96

issue

3

eissn

1085-9195

issn

1559-0283

journal_volume

68

pub_type

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