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2012 Fiscal Year Final Research Report

The involvement of thyroid hormones and related molecules in neuroprotective mechanisms in the developing brain.

Research Project

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Project/Area Number 22591823
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Obstetrics and gynecology
Research InstitutionKawasaki Medical School (2012)
Osaka University (2010-2011)

Principal Investigator

TOMIMATSU Takuji  川崎医科大学, 医学部, 准教授 (30346209)

Project Period (FY) 2010 – 2012
Keywords産科学 / 新生児脳障害 / 甲状腺ホルモン / 脳性麻痺
Research Abstract

Neonatal hypoxic〓ischemic encephalopathy (HIE) is one of the major causes of neurodegeneration and mortality in the neonatal period. Although hypoxic preconditioning (HPC) provided strong neuroprotection against HIE in an animal model, the mechanism underlying this effect is not fully understood especially in the immature brain. Here, we investigated whether thyroid hormones (THs), which are essential during normal brain development, contribute to the neuroprotective mechanisms of HPC by using an established model of HPC in neonatal rats. HPC treatment (8% O2 for 2.5 h at 37°C) was performed in immature rats at postnatal day6 (P6). Subsequently, we investigated the levels of THs, TH receptors (TRs) and type2 and 3 deiodinases (D2 and D3) mRNA, and myelin basic protein (MBP) at 24 h after HPC treatment at P7. The local level of triiodothyronine (T3) was upregulated 24 h after HPC treatment in the developing rat brain, probably via the upregulation of D2. In addition, the expression of MBP, which is the downstream protein of T3, was significantly increased 24 h after HPC treatment. The present study indicates that thyroid hormones and their associated molecules may play a significant role in neuroprotective mechanisms during the developmental period.

  • Research Products

    (3 results)

All 2013 2012

All Journal Article (3 results) (of which Peer Reviewed: 2 results)

  • [Journal Article] Hypoxic preconditioning increases triiodothyronine (T3) level in the developing rat brain.2013

    • Author(s)
      Minato K, Tomimatsu T, Mimura K, Jugder O, Kakigano A, Kanayama T, Fujita S, Taniguchi Y, Kanagawa T, Endo M, Kimura T.
    • Journal Title

      Brain Res

      Volume: 1501 Pages: 89-97

    • DOI

      doi:10.1016/j.brainres.2013.01.036

    • Peer Reviewed
  • [Journal Article] Maternal hyperventilation during labor revisited: its effects on fetal oxygenation.2012

    • Author(s)
      Tomimatsu T, Kakigano A, Mimura K, Kanayama T, Koyama S, Fujita S, Taniguchi Y,Kanagawa T Kimura T
    • Journal Title

      Reprod Sci.

      Volume: 19(11) Pages: 1169-74

    • DOI

      doi:10.1177/1933719112443881

    • Peer Reviewed
  • [Journal Article] 母体甲状腺機能と出生児の中枢神経発達産婦人科の進歩産2012

    • Author(s)
      冨松拓治
    • Journal Title

      婦人科の進歩

      Volume: 64巻3号 Pages: 426-429

URL: 

Published: 2014-08-29  

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