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Reproductive Sciences

, Volume 18, Issue 12, pp 1193–1201 | Cite as

Ceftriaxone Preconditioning Confers Neuroprotection in Neonatal Rats Through Glutamate Transporter 1 Upregulation

  • Kazuya Mimura
  • Takuji TomimatsuEmail author
  • Kenji Minato
  • Otgonbaatar Jugder
  • Yukiko Kinugasa-Taniguchi
  • Takeshi Kanagawa
  • Masatoshi Nozaki
  • Itaru Yanagihara
  • Tadashi Kimura
Original Articles

Abstract

Objective

This study investigated the hypothesis that ceftriaxone preconditioning ameliorates brain damage in neonatal animals through glutamate transporter 1 (GLT-1) upregulation.

Study design

Sprague Dawley rats were pretreated with ceftriaxone, erythromycin, minocycline, or saline for 5 consecutive days starting from postnatal day 2 (P2), and GLT-1/glutamate-aspartate transporter (GLAST) messenger RNA (mRNA) and protein levels were examined in the P7 brains. After ceftriaxone or saline preconditioning, the P7 rats underwent hypoxic-ischemic (H-I) procedure or sham operation. One week after the procedure (P14), hematoxylin-eosin staining, microtubule-associated protein 2 (MAP-2) immunostaining, and transferase-mediated deoxyuridine triphosphate nick end labeling (TUNEL) assay were used to examine neuronal damage and possible neurotoxicity.

Results

Repeated ceftriaxone injections significantly increased GLT-1 mRNA and protein levels but not GLAST. Following such treatment and H-I procedure, the MAP-2-positive area increased and TUNEL-positive cells decreased. Conclusion: Antenatal ceftriaxone may help to provide neuroprotection in the immature brain and become a new prophylactic strategy to reduce neonatal encephalopathy in clinical perinatal medicine.

Keywords

ceftriaxone glutamate transporter 1 (GLT-1) preconditioning neuroprotection neonatal rat 

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Copyright information

© Society for Reproductive Investigation 2011

Authors and Affiliations

  • Kazuya Mimura
    • 1
    • 2
  • Takuji Tomimatsu
    • 1
    Email author
  • Kenji Minato
    • 1
  • Otgonbaatar Jugder
    • 1
  • Yukiko Kinugasa-Taniguchi
    • 1
  • Takeshi Kanagawa
    • 1
  • Masatoshi Nozaki
    • 2
  • Itaru Yanagihara
    • 2
  • Tadashi Kimura
    • 1
  1. 1.Department of Obstetrics and GynecologyOsaka University Graduate School of MedicineSuita, OsakaJapan
  2. 2.Department of Developmental MedicineOsaka Medical Center and Research Institute for Maternal and Child HealthIzumi, OsakaJapan

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