Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Expression of Calponin 3 in the Striatum Following 3-Nitropropionic Acid-induced Neurotoxicity

선조체에서 3-nitropropionic acid 투여 후 calponin 3의 발현 연구

  • Choi, Yun-Sik (Department of Pharmaceutical Science and Technology, Catholic University of Daegu)
  • 최윤식 (대구가톨릭대학교 제약산업공학과)
  • Received : 2012.12.11
  • Accepted : 2012.12.28
  • Published : 2013.01.30
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Abstract

Calponin 3 is an F-actin-binding protein and plays a key role in regulating spine plasticity and synaptic activity in neurons. Unlike the other subtypes, calponin 1 and 2, which are expressed in smooth and cardiac muscle cells, calponin 3 is highly expressed in the brain. The goal of this study was to elucidate the spatiotemporal expression pattern of calponin 3 following repeated administration of 3-nitropropionic acid in mice. The repeated administration of 3-nitropropionic acid generated necrotic neuronal cell death in the striatum. Calponin 3 was up-regulated in the neuroprotective penimbral region from 1.5 days after the last injection and thereafter. Double immunofluorescence study revealed that calponin 3 was induced in GFAP-positive astrocytes. These results suggest that calponin 3 induction in the neuroprotective penumbral area following 3-nitropropionic acid intoxication may play a key role in reactive astrogliosis in the striatum.

Calponin 3는 F-actin과 결합하는 단백질로 신경계의 가소성과 시냅스 활성을 조절하는데 중요한 역할을 하는 것으로 알려져 있다. 평활근과 심장근에 발현되는 calponin 1과 calponin 2와는 다르게 calponin 3는 뇌 조직에 많이 발현되어 있는 것으로 보고되고 있다. 본 연구는 마우스에서 3-nitropropionic acid를 투여하여 선조체에 비가역적 신경 손상을 주었을 때 calponin 3의 발현 양상을 알아보기 위하여 진행되었다. 본 연구 결과 3-nitropropionic acid를 마우스에 투여하였을 때 선조체에서 신경조직의 괴사가 일어남을 관찰하였으며 calponin 3는 약물 투여 후 1.5일부터 서서히 발현되는 것을 확인하였다. 특히, calponin 3는 신경조직의 괴사가 일어나는 부위의 주변부에서 발현되는 것을 확인하였으며 형광 이중면역 염색법으로 확인한 결과 GFAP를 발현하는 별아교세포에서 발현됨을 최초로 밝혔다. 따라서, calponin 3가 3-nitropropionic acid의 독성에 저항성을 나타내는 부위에서 별아교세포에서만 특이적으로 발현되는 것으로 보아 calponin 3는 별아교세포에 의한 신경아교증에 중요한 역할을 하는 것으로 추측된다.

Keywords

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