Role of tissue plasminogen activator in the sensitization of methamphetamine-induced dopamine release in the nucleus accumbens

Ayumi Fukakusa, Taku Nagai, Hiroyuki Mizoguchi, Noboru Otsuka, Haruhide Kimura, Hiroyuki Kamei, Hyoung Chun Kim, Toshitaka Nabeshima, Kazuhiro Takuma, Kiyofumi Yamada

研究成果: Article

15 引用 (Scopus)

抄録

We have previously demonstrated that repeated, but not acute, methamphetamine (METH) treatment increases tissue plasminogen activator (tPA) activity in the brain, which is associated with the development of behavioral sensitization to METH. In this study, we investigated whether the tPA-plasmin system is involved in the development of sensitization in METH-induced dopamine release in the nucleus accumbens (NAc). There was no difference in acute METH-induced increase in extracellular dopamine levels in the NAc between wild-type and tPA-deficient (tPA-/-) mice. Repeated METH treatment resulted in a significant enhancement of METH- induced dopamine release in wild-type mice, but not tPA-/- mice. Microinjection of exogenous tPA or plasmin into the NAc of wild-type mice significantly potentiated acute METH- induced dopamine release. Degradation of laminin was evident in brain tissues incubated with tPA plus plasminogen or plasmin in vitro although tPA or plasminogen alone had no effect. Immunohistochemical analysis revealed that microinjection of plasmin into the NAc reduced laminin immunoreactivity without neuronal damage. Our findings suggest that the tPA-plasmin system participates in the development of behavioral sensitization induced by repeated METH treatment, by regulating the processes underlying the sensitization of METH-induced dopamine release in the NAc, in which degradation of laminin by plasmin may play a role.

元の言語English
ページ(範囲)436-444
ページ数9
ジャーナルJournal of Neurochemistry
105
発行部数2
DOI
出版物ステータスPublished - 01-04-2008
外部発表Yes

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Methamphetamine
Nucleus Accumbens
Tissue Plasminogen Activator
Dopamine
Fibrinolysin
Laminin
Plasminogen
Microinjections
Brain
Degradation
Therapeutics
Tissue

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Cellular and Molecular Neuroscience

これを引用

Fukakusa, Ayumi ; Nagai, Taku ; Mizoguchi, Hiroyuki ; Otsuka, Noboru ; Kimura, Haruhide ; Kamei, Hiroyuki ; Kim, Hyoung Chun ; Nabeshima, Toshitaka ; Takuma, Kazuhiro ; Yamada, Kiyofumi. / Role of tissue plasminogen activator in the sensitization of methamphetamine-induced dopamine release in the nucleus accumbens. :: Journal of Neurochemistry. 2008 ; 巻 105, 番号 2. pp. 436-444.
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abstract = "We have previously demonstrated that repeated, but not acute, methamphetamine (METH) treatment increases tissue plasminogen activator (tPA) activity in the brain, which is associated with the development of behavioral sensitization to METH. In this study, we investigated whether the tPA-plasmin system is involved in the development of sensitization in METH-induced dopamine release in the nucleus accumbens (NAc). There was no difference in acute METH-induced increase in extracellular dopamine levels in the NAc between wild-type and tPA-deficient (tPA-/-) mice. Repeated METH treatment resulted in a significant enhancement of METH- induced dopamine release in wild-type mice, but not tPA-/- mice. Microinjection of exogenous tPA or plasmin into the NAc of wild-type mice significantly potentiated acute METH- induced dopamine release. Degradation of laminin was evident in brain tissues incubated with tPA plus plasminogen or plasmin in vitro although tPA or plasminogen alone had no effect. Immunohistochemical analysis revealed that microinjection of plasmin into the NAc reduced laminin immunoreactivity without neuronal damage. Our findings suggest that the tPA-plasmin system participates in the development of behavioral sensitization induced by repeated METH treatment, by regulating the processes underlying the sensitization of METH-induced dopamine release in the NAc, in which degradation of laminin by plasmin may play a role.",
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Fukakusa, A, Nagai, T, Mizoguchi, H, Otsuka, N, Kimura, H, Kamei, H, Kim, HC, Nabeshima, T, Takuma, K & Yamada, K 2008, 'Role of tissue plasminogen activator in the sensitization of methamphetamine-induced dopamine release in the nucleus accumbens', Journal of Neurochemistry, 巻. 105, 番号 2, pp. 436-444. https://doi.org/10.1111/j.1471-4159.2007.05142.x

Role of tissue plasminogen activator in the sensitization of methamphetamine-induced dopamine release in the nucleus accumbens. / Fukakusa, Ayumi; Nagai, Taku; Mizoguchi, Hiroyuki; Otsuka, Noboru; Kimura, Haruhide; Kamei, Hiroyuki; Kim, Hyoung Chun; Nabeshima, Toshitaka; Takuma, Kazuhiro; Yamada, Kiyofumi.

:: Journal of Neurochemistry, 巻 105, 番号 2, 01.04.2008, p. 436-444.

研究成果: Article

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T1 - Role of tissue plasminogen activator in the sensitization of methamphetamine-induced dopamine release in the nucleus accumbens

AU - Fukakusa, Ayumi

AU - Nagai, Taku

AU - Mizoguchi, Hiroyuki

AU - Otsuka, Noboru

AU - Kimura, Haruhide

AU - Kamei, Hiroyuki

AU - Kim, Hyoung Chun

AU - Nabeshima, Toshitaka

AU - Takuma, Kazuhiro

AU - Yamada, Kiyofumi

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N2 - We have previously demonstrated that repeated, but not acute, methamphetamine (METH) treatment increases tissue plasminogen activator (tPA) activity in the brain, which is associated with the development of behavioral sensitization to METH. In this study, we investigated whether the tPA-plasmin system is involved in the development of sensitization in METH-induced dopamine release in the nucleus accumbens (NAc). There was no difference in acute METH-induced increase in extracellular dopamine levels in the NAc between wild-type and tPA-deficient (tPA-/-) mice. Repeated METH treatment resulted in a significant enhancement of METH- induced dopamine release in wild-type mice, but not tPA-/- mice. Microinjection of exogenous tPA or plasmin into the NAc of wild-type mice significantly potentiated acute METH- induced dopamine release. Degradation of laminin was evident in brain tissues incubated with tPA plus plasminogen or plasmin in vitro although tPA or plasminogen alone had no effect. Immunohistochemical analysis revealed that microinjection of plasmin into the NAc reduced laminin immunoreactivity without neuronal damage. Our findings suggest that the tPA-plasmin system participates in the development of behavioral sensitization induced by repeated METH treatment, by regulating the processes underlying the sensitization of METH-induced dopamine release in the NAc, in which degradation of laminin by plasmin may play a role.

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