Neurochemical Research

, Volume 31, Issue 7, pp 957–965 | Cite as

Ionized Calcium-binding Adapter Molecule 1 Immunoreactive Cells Change in the Gerbil Hippocampal CA1 Region after Ischemia/Reperfusion

  • In Koo Hwang
  • Ki-Yeon Yoo
  • Dae Won Kim
  • Soo Young Choi
  • Tae-Cheon Kang
  • Yong-Sun Kim
  • Moo Ho WonEmail author


Ionized calcium-binding adapter molecule 1 (iba-1) is specifically expressed in microglia and plays an important role in the regulation of the function of microglia. We observed chronological changes of iba-1-immunoreactive cells and iba-1 level in the gerbil hippocampal CA1 region after transient ischemia. Transient forebrain ischemia in gerbils was induced by the occlusion of bilateral common carotid arteries for 5 min. Immunohistochemical and Western blot analysis of iba-1 were performed in the gerbil ischemic hippocampus. In the sham-operated group, iba-1-immunoreactive cells were detected in the CA1 region. Thirty minutes after ischemia/reperfusion, iba-1 immunoreactivity significantly increased, and its immunoreactive cells were well ramified. Three hours after ischemia/reperfusion, iba-1 immunoreactivity and level decreased, and thereafter they increased again with time after ischemia/reperfusion. Three days after ischemia/reperfusion, iba-1-immunoreactive cells had well-ramified processes, which projected to the stratum pyramidale of the CA1 region. Seven days after ischemia/reperfusion, iba-1 immunoreactivity and level were highest in the CA1 region, whereas they significantly decreased in the CA1 region 10 days after ischemia/reperfusion. Iba-1-immunoreactive cells in the ischemic CA1 region were co-localized with OX-42, a microglia marker. In brief, iba-1-immunoreactive cells change morphologically and iba-1 immunoreactivity alters in the CA1 region with time after ischemia/reperfusion. These may be associated with the delayed neuronal death of CA1 pyramidal cells in the gerbil ischemic hippocampus.


Hippocampal CA1 region Ischemic damage Microglia Gliosis Iba-1 



The authors would like to thank Mr. Seok Han, Mr. Seung Uk Lee and Ms. Hyun Sook Kim for technical help in this study. This work was supported by the MRC program of MOST/KOSEF (R13-2005-022-01002-0).


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • In Koo Hwang
    • 1
  • Ki-Yeon Yoo
    • 1
  • Dae Won Kim
    • 2
  • Soo Young Choi
    • 2
  • Tae-Cheon Kang
    • 1
  • Yong-Sun Kim
    • 3
    • 4
  • Moo Ho Won
    • 1
    • 4
    Email author
  1. 1.Department of Anatomy, College of MedicineHallym UniversityChunchonSouth Korea
  2. 2.Department of Biomedical Sciences, and Research Institute for Bioscience and BiotechnologyHallym UniversityChunchonSouth Korea
  3. 3.Department of Microbiology, College of MedicineHallym UniversityChuncheonRepublic of Korea
  4. 4.MRC Research InstituteHallym UniversityChuncheonRepublic of Korea

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