Impaired recruitment of neuroprotective microglia and T cells during acute neuronal injury coincides with increased neuronal vulnerability in an amyotrophic lateral sclerosis model

Mami Fukunaga Kawamura, Ryo Yamasaki, Nobutoshi Kawamura, Takahisa Tateishi, Yuko Nagara, Takuya Matsushita, Yasumasa Ohyagi, Jun-Ichi Kira

研究成果: ジャーナルへの寄稿記事

9 引用 (Scopus)

抄録

Non-cell-autonomous motor neuronal death is suggested in a mutant Cu/Zn superoxide dismutase 1 (mSOD1)-mediated amyotrophic lateral sclerosis (ALS) model, in which microglia and T cells play significant roles in disease progression. However, it remains unknown whether these cells are toxic or protective. The present study aimed to clarify the developmental age-related alterations of neuronal, glial and T cell responses to acute neuron injury in non-transgenic (N-Tg) mice, and the in vivo effects of mSOD1 on these changes by studying N-Tg and mSOD1-Tg mice subjected to unilateral hypoglossal nerve axotomy at young (8. weeks) and adult (17. weeks) ages. Adult N-Tg mice showed increased neuronal viability on day 21 after axotomy and trends toward increased numbers of recruited microglia on day 3 and T cells on day 7, in the hypoglossal nucleus, compared with young N-Tg mice. Quantitative comparisons between mSOD1-Tg and N-Tg mice at the same ages, on day 3 after axotomy, showed that microglial recruitment was significantly lower in mSOD1-Tg mice than in 17-week-old N-Tg mice (the disease progression stage), but the same difference was not seen in 8-week-old mice (the presymptomatic stage), despite good preservation of hypoglossal neurons. Infiltration of CD3-positive T cells, mostly CD4-positive, on day 7 and the viability rate of hypoglossal neurons on the operated side compared with the contralateral side on day 21 were significantly decreased in mSOD1-Tg mice compared with N-Tg mice aged 17. weeks, but the same difference was not seen in mice aged 8. weeks. On day 3 after axotomy, expression levels of IGF-1 mRNA in the operated hypoglossal nucleus were significantly lower in mSOD1-Tg mice than N-Tg mice at 17. weeks of age. The observation that depressed microglial and T cell responses and expression of neurotrophic factors coincided with reduced neuronal viability in adult mSOD1-Tg mice suggests that diminished neuroprotective functions of mSOD1 microglia and T cells may contribute to exaggerated neuronal death.

元の言語英語
ページ(範囲)437-445
ページ数9
ジャーナルExperimental Neurology
234
発行部数2
DOI
出版物ステータス出版済み - 4 1 2012

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Amyotrophic Lateral Sclerosis
Microglia
T-Lymphocytes
Wounds and Injuries
Axotomy
Superoxide Dismutase-1
Neurons
Disease Progression
Hypoglossal Nerve
Poisons
Nerve Growth Factors
Insulin-Like Growth Factor I

All Science Journal Classification (ASJC) codes

  • Neurology
  • Developmental Neuroscience

これを引用

Impaired recruitment of neuroprotective microglia and T cells during acute neuronal injury coincides with increased neuronal vulnerability in an amyotrophic lateral sclerosis model. / Kawamura, Mami Fukunaga; Yamasaki, Ryo; Kawamura, Nobutoshi; Tateishi, Takahisa; Nagara, Yuko; Matsushita, Takuya; Ohyagi, Yasumasa; Kira, Jun-Ichi.

:: Experimental Neurology, 巻 234, 番号 2, 01.04.2012, p. 437-445.

研究成果: ジャーナルへの寄稿記事

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abstract = "Non-cell-autonomous motor neuronal death is suggested in a mutant Cu/Zn superoxide dismutase 1 (mSOD1)-mediated amyotrophic lateral sclerosis (ALS) model, in which microglia and T cells play significant roles in disease progression. However, it remains unknown whether these cells are toxic or protective. The present study aimed to clarify the developmental age-related alterations of neuronal, glial and T cell responses to acute neuron injury in non-transgenic (N-Tg) mice, and the in vivo effects of mSOD1 on these changes by studying N-Tg and mSOD1-Tg mice subjected to unilateral hypoglossal nerve axotomy at young (8. weeks) and adult (17. weeks) ages. Adult N-Tg mice showed increased neuronal viability on day 21 after axotomy and trends toward increased numbers of recruited microglia on day 3 and T cells on day 7, in the hypoglossal nucleus, compared with young N-Tg mice. Quantitative comparisons between mSOD1-Tg and N-Tg mice at the same ages, on day 3 after axotomy, showed that microglial recruitment was significantly lower in mSOD1-Tg mice than in 17-week-old N-Tg mice (the disease progression stage), but the same difference was not seen in 8-week-old mice (the presymptomatic stage), despite good preservation of hypoglossal neurons. Infiltration of CD3-positive T cells, mostly CD4-positive, on day 7 and the viability rate of hypoglossal neurons on the operated side compared with the contralateral side on day 21 were significantly decreased in mSOD1-Tg mice compared with N-Tg mice aged 17. weeks, but the same difference was not seen in mice aged 8. weeks. On day 3 after axotomy, expression levels of IGF-1 mRNA in the operated hypoglossal nucleus were significantly lower in mSOD1-Tg mice than N-Tg mice at 17. weeks of age. The observation that depressed microglial and T cell responses and expression of neurotrophic factors coincided with reduced neuronal viability in adult mSOD1-Tg mice suggests that diminished neuroprotective functions of mSOD1 microglia and T cells may contribute to exaggerated neuronal death.",
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T1 - Impaired recruitment of neuroprotective microglia and T cells during acute neuronal injury coincides with increased neuronal vulnerability in an amyotrophic lateral sclerosis model

AU - Kawamura, Mami Fukunaga

AU - Yamasaki, Ryo

AU - Kawamura, Nobutoshi

AU - Tateishi, Takahisa

AU - Nagara, Yuko

AU - Matsushita, Takuya

AU - Ohyagi, Yasumasa

AU - Kira, Jun-Ichi

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N2 - Non-cell-autonomous motor neuronal death is suggested in a mutant Cu/Zn superoxide dismutase 1 (mSOD1)-mediated amyotrophic lateral sclerosis (ALS) model, in which microglia and T cells play significant roles in disease progression. However, it remains unknown whether these cells are toxic or protective. The present study aimed to clarify the developmental age-related alterations of neuronal, glial and T cell responses to acute neuron injury in non-transgenic (N-Tg) mice, and the in vivo effects of mSOD1 on these changes by studying N-Tg and mSOD1-Tg mice subjected to unilateral hypoglossal nerve axotomy at young (8. weeks) and adult (17. weeks) ages. Adult N-Tg mice showed increased neuronal viability on day 21 after axotomy and trends toward increased numbers of recruited microglia on day 3 and T cells on day 7, in the hypoglossal nucleus, compared with young N-Tg mice. Quantitative comparisons between mSOD1-Tg and N-Tg mice at the same ages, on day 3 after axotomy, showed that microglial recruitment was significantly lower in mSOD1-Tg mice than in 17-week-old N-Tg mice (the disease progression stage), but the same difference was not seen in 8-week-old mice (the presymptomatic stage), despite good preservation of hypoglossal neurons. Infiltration of CD3-positive T cells, mostly CD4-positive, on day 7 and the viability rate of hypoglossal neurons on the operated side compared with the contralateral side on day 21 were significantly decreased in mSOD1-Tg mice compared with N-Tg mice aged 17. weeks, but the same difference was not seen in mice aged 8. weeks. On day 3 after axotomy, expression levels of IGF-1 mRNA in the operated hypoglossal nucleus were significantly lower in mSOD1-Tg mice than N-Tg mice at 17. weeks of age. The observation that depressed microglial and T cell responses and expression of neurotrophic factors coincided with reduced neuronal viability in adult mSOD1-Tg mice suggests that diminished neuroprotective functions of mSOD1 microglia and T cells may contribute to exaggerated neuronal death.

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