Cellular and Molecular Neurobiology

, Volume 36, Issue 5, pp 821–828 | Cite as

Ischemia-Induced Changes of PRAS40 and p-PRAS40 Immunoreactivities in the Gerbil Hippocampal CA1 Region After Transient Cerebral Ischemia

  • Joon Ha Park
  • Bich Na Shin
  • Ji Hyeon Ahn
  • Jeong-Hwi Cho
  • In Hye Kim
  • Dae Won Kim
  • Moo-Ho Won
  • Seongkweon Hong
  • Jun Hwi ChoEmail author
  • Choong-Hyun LeeEmail author
Original Research


Proline-rich Akt substrate of 40-kDa (PRAS40) is one of the important interactive linkers between Akt and mTOR signaling pathways. The increase of PRAS40 is related with the reduction of brain damage induced by cerebral ischemia. In the present study, we investigated time-dependent changes in PRAS40 and phospho-PRAS40 (p-PRAS40) immunoreactivities in the hippocampal CA1 region of the gerbil after 5 min of transient cerebral ischemia. PRAS40 immunoreactivity in the CA1 region was decreased in pyramidal neurons from 12 h after ischemic insult in a time-dependent manner, and, at 5 days post-ischemia, PRAS40 immunoreactivity was newly expressed in astrocytes. p-PRAS40 immunoreactivity in the CA1 pyramidal neurons was hardly found 12 h and apparently detected again 1 and 2 days after ischemic insult. At 5 days post-ischemia, p-PRAS40 immunoreactivity in the CA1 pyramidal neurons was not found. These results indicate that ischemia-induced changes in PRAS40 and p-PRAS40 immunoreactivities in CA1 pyramidal neurons and astrocytes may be closely associated with delayed neuronal death in the hippocampal CA1 region following transient cerebral ischemia.


PRAS40 Transient global cerebral ischemia Delayed neuronal death Astrocyte 



The authors would like to thank Mr. Seung Uk Lee for technical help. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2014R1A1A2058440), by a Grant HO14C0001 from Osong Innovation Center funded by the Ministry of Health & Welfare, the Republic of Korea, and by 2013 Research Grant from Kangwon National University (No. 120131326).

Compliance with Ethical Standards

Disclosure of potential conflicts of interest

The authors declare that they have no potential conflicts of interest.

Statement on the welfare of animals

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Joon Ha Park
    • 1
  • Bich Na Shin
    • 2
  • Ji Hyeon Ahn
    • 1
  • Jeong-Hwi Cho
    • 1
  • In Hye Kim
    • 1
  • Dae Won Kim
    • 3
  • Moo-Ho Won
    • 1
  • Seongkweon Hong
    • 4
  • Jun Hwi Cho
    • 5
    Email author
  • Choong-Hyun Lee
    • 6
    Email author
  1. 1.Department of Neurobiology, School of MedicineKangwon National UniversityChuncheonSouth Korea
  2. 2.Department of Physiology, College of MedicineHallym UniversityChuncheonSouth Korea
  3. 3.Department of Biochemistry and Molecular Biology, College of Dentistry, and Research Institute of Oral SciencesKangnung-Wonju National UniversityGangneungSouth Korea
  4. 4.Department of Surgery, School of MedicineKangwon National UniversityChuncheonSouth Korea
  5. 5.Department of Emergency Medicine, College of Medicine, School of MedicineKangwon National UniversityChuncheonSouth Korea
  6. 6.Department of Pharmacy, College of PharmacyDankook UniversityCheonanSouth Korea

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