Depressive Behavior and Alterations in Receptors for Dopamine and 5-Hydroxytryptamine in the Brain of the Senescence Accelerated Mouse (SAM)-P10

  • Onodera Takahiro
    Department of Pharmacology,Graduate School of Pharmaceutical Sciences,Hokkaido University,Sapporo 060-0812,Japan
  • Watanabe Ritsuko
    Department of Pharmacology,Graduate School of Pharmaceutical Sciences,Hokkaido University,Sapporo 060-0812,Japan
  • Kyi Tha Kyi
    Department of Pharmacology,Graduate School of Pharmaceutical Sciences,Hokkaido University,Sapporo 060-0812,Japan Hokkaido Foundation for the Promotion of Scientific and Industrial Technology,Sapporo 060-0001,Japan
  • Hayashi Yuka
    Hokkaido Foundation for the Promotion of Scientific and Industrial Technology,Sapporo 060-0001,Japan
  • Murayama Toshihiko
    Department of Pharmacology,Graduate School of Pharmaceutical Sciences,Hokkaido University,Sapporo 060-0812,Japan
  • Okuma Yasunobu
    Department of Pharmacology,Graduate School of Pharmaceutical Sciences,Hokkaido University,Sapporo 060-0812,Japan
  • Ono Chizuko
    New Drug Development Research Center,Inc.,Eniwa 061-1405,Japan
  • Oketani Yoneshiro
    New Drug Development Research Center,Inc.,Eniwa 061-1405,Japan
  • Hosokawa Masanori
    Department of Senescence Biology,Chest Disease Research Institute,Kyoto University,Kyoto 606-8397,Japan
  • Nomura Yasuyuki
    Department of Pharmacology,Graduate School of Pharmaceutical Sciences,Hokkaido University,Sapporo 060-0812,Japan

書誌事項

タイトル別名
  • Depressive Behavior and Alterations in Receptors for Dopamine and 5-Hydroxyiryptamine in the Brain of the Senescence Accelerated Mouse (SAM)-P10.

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抄録

The senescence accelerated mouse(SAM)is known as a murine model of aging.SAM consists of senescence accelerated−prone mouse(SAMP)and senescence accelerated−resistant mouse(SAMR).Previous studies reported that SAMP10 exhibits age−related learning impairments and behavioral depression in a tail suspension test after 7 months.We investigated the changes in emotional behavior in a forced swimming test and in receptors for dopamine and 5−hydroxytryptamine(5−HT)in SAMP10.SAMP10 at 8 months showed an increase of immobility in the test compared with SAMR1.Treatment with desipramine(25 mg/kg, i.p., 3 days)in SAMP10 caused a decrease in immobility.In the cortex from SAMP10, [3H]quinpirole binding to D2/D3 dopamine receptors increased significantly compared with control SAMR1.In the hippocampus from SAMP10, [3H]8−hydroxy DPAT binding to 5−HT1A receptor increased.In midbrains from SAMP10, bindings of [3H]quinpirole and [3H]8−hydroxy DPAT increased.[3H]SCH23390 binding to D1/D5 receptors and [3H]ketanserin binding to 5−HT2 receptor in brain regions examined in SAMP10 were similar to those in SAMR1.The present findings represent the first neurochemical evidence of an increase of D2/D3 and 5−HT1A receptors in SAMP10.SAMP10 may be a useful model of aging associated depressive behavior.

収録刊行物

  • Jpn.J.Pharmacol.

    Jpn.J.Pharmacol. 83 (4), 312-318, 2000

    公益社団法人 日本薬理学会

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