Cellular and Molecular Neurobiology

, Volume 33, Issue 2, pp 213–221

Temporal-Spatial Expressions of Spy1 in Rat Sciatic Nerve After Crush

  • Jianhua Cao
  • Jiao Yang
  • Youhua Wang
  • Jian Xu
  • Zhengming Zhou
  • Chun Cheng
  • Xiaojuan Liu
  • Xinghai Cheng
  • Long Long
  • Xingxing Gu
Original Research

Abstract

As a novel cell cycle protein, Spy1 enhances cell proliferation, promotes the G1/S transition as well as inhibits apoptosis in response to UV irradiation. Spy1 levels are tightly regulated during mammary development, and overexpression of Spy1 accelerates tumorigenesis in vivo. But little is known about the role of Spy1 in the pathological process of damage and regeneration of the peripheral nervous system. Here we established a rat sciatic nerve crush (SNC) model to examine the spatiotemporal expression of Spy1. Spy1 expression was elevated gradually after sciatic nerve crush and peaked at day 3. The alteration was due to the increased expression of Spy1 in axons and Schwann cells after SNC. Spy1 expression correlated closely with Schwann cells proliferation in sciatic nerve post injury. Furthermore, Spy1 largely localized in axons in the crushed segment, but rarely co-localized with GAP43. These findings suggested that Spy1 participated in the pathological process response to sciatic nerve injury and may be associated with Schwann cells proliferation and axons regeneration.

Keywords

Sciatic nerve crush Schwann cells Spy1 Axonal regeneration 

Abbreviations

SCs

Schwann cells

GAPDH

Glyceraldehyde-3-phosphate dehydrogenase

PNS

Peripheral nervous system

SNC

Sciatic nerve crush

RT-PCR

Reverse transcriptase PCR

GAP43

Growth-associated protein 43

CDKs

Cyclin-dependent kinases

Supplementary material

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Supplementary material 1 (TIFF 1424 kb)
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Supplementary material 2 (TIFF 912 kb)
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Supplementary material 3 (TIFF 856 kb)

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Jianhua Cao
    • 1
  • Jiao Yang
    • 3
  • Youhua Wang
    • 4
  • Jian Xu
    • 1
  • Zhengming Zhou
    • 3
  • Chun Cheng
    • 3
  • Xiaojuan Liu
    • 5
  • Xinghai Cheng
    • 4
  • Long Long
    • 4
  • Xingxing Gu
    • 2
  1. 1.Department of OrthopaedicsAffiliated Mental Health Center of Nantong UniversityNantongPeople’s Republic of China
  2. 2.The Jiangsu Province Key Laboratory of NeuroregenerationNantong UniversityNantongPeople’s Republic of China
  3. 3.Department of ImmunologyMedical College, Nantong UniversityNantongPeople’s Republic of China
  4. 4.Department of OrthopaedicsAffiliated Hospital of Nantong UniversityNantongPeople’s Republic of China
  5. 5.Department of PathogenbiologyMedical College, Nantong UniversityNantongPeople’s Republic of China

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