Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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The Effect of Treadmill Exercise and Environmental Enrichment on Cognitive Function, Muscle Function, and Levels of tight junction protein in an Alzheimer's Disease Animal Model

트레드밀 운동 및 환경강화가 알츠하이머 질환 동물 모델의 인지기능, 근 기능 및 밀착연접 단백질 수준에 미치는 영향

  • Hyun-Seob Um (Sport Medicine, Kon Yang University) ;
  • Jong-Hwan Jung (Physical Education, Korea National Sport University) ;
  • Tae-Kyung Kim (Sport Science Institute, Korea National Sport University) ;
  • Yoo-Joung Jeon (Exercise Training for Health care and Management, Korea National Sport University) ;
  • Joon-Yong Cho (Exercise Training for Health care and Management, Korea National Sport University) ;
  • Jung-Hoon Koo (Exercise Training for Health care and Management, Korea National Sport University)
  • 엄현섭 (건양대학교 스포츠의학과) ;
  • 정종환 (한국체육대학교 체육학과) ;
  • 김태경 (한국체육대학교 체육과학연구소) ;
  • 전유정 (한국체육대학교 운동건강관리학과) ;
  • 조준용 (한국체육대학교 운동건강관리학과) ;
  • 구정훈 (한국체육대학교 운동건강관리학과)
  • Received : 2024.01.25
  • Accepted : 2024.02.23
  • Published : 2024.02.28
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Abstract

The purpose of this study was to investigate the effects of treadmill exercise treadmill exercise (TE) and environmental enrichment (EE) interventions on cognitive function, muscle function, and the expression of tight junction proteins in an Alzheimer's disease (AD) animal model. To create the AD animal model, aluminum chloride (AlCl3) was administered for 90 days (40mg/kg/day), while simultaneously exposing the animals to TE (10-12m/min, 40-60min/day) or EE. The results showed that cognitive impairment and muscle dysfunction induced by AlCl3 administration were alleviated by TE and EE. Furthermore, TE and EE reduced the increased expression of β-amyloid(Aβ), alpha-synuclein, and tumor necrosis factor-α (TNF-α) proteins observed in AD pathology. Additionally, TE and EE significantly increased the expression of decreased adhesive adjacent proteins (Occludin, Claudin-5, and ZO-1) induced by AlCl3 administration. Lastly, correlation analysis between Aβ protein and tight junction proteins showed negative correlations (Occludin: r=-0.853, p=0.001; Claudin-5: r=-0.352, p=0.915; ZO-1: r=-0.424, p=0.0390). In conclusion, TE or EE interventions are considered effective exercise methods that partially alleviate pathological features of AD, improving cognitive and muscle function.

본 연구의 목적은 알츠하이머질환(Alzheimer's disease: AD) 동물 모델을 대상으로 트레드밀 운동(Treadmill exercise: TE)과 환경강화(environmental enrichment: EE) 처치가 인지기능, 근 기능, 및 밀착연접 단백질 발현에 미치는 영향을 확인하는데 있다. AD 동물 모델을 제작하기 위해 aluminum chloride(AlCl3)를 90일간(40mg/kg/하루) 투여 하였으며 동시에 TE(10-12m/min, 40-60min/day) 혹은 EE에 노출시켰다. 그 결과 AlCl3 투여에 의한 인지기능 저하와 근 기능 감소가 TE와 EE에 의해 완화된 것으로 나타났다. 또한, TE와 EE는 AD 질환에서 나타나는 β-amyloid(Aβ), alpha-synuclein 및 tumor necrosis factor-α(TNF-α) 단백질의 발현 증가를 감소시킨 것으로 나타났다. 게다가 TE와 EE는 AlCl3 투여에 의해 감소된 밀착연접 단백질(Occludin, Claudin-5 및 ZO-1)의 발현을 통계적으로 유의하게 증가시킨 것으로 나타났다. 마지막으로 Aβ 단백질과 밀착연접 단백질과의 상관분석을 실시한 결과 부적 상관관계(Occludin: r=-0.853, p=0.001; Claudin-5 : r=-0.352, p=0.915; ZO-1 : r=-0.424, p=0.0390)로 나타났다. 따라서 이를 종합해 보면 TE 혹은 EE 처치는 AD에 나타나는 병리학적 특징들을 일부 완화시켜 인지기능과 근 기능을 일부 개선 시킬 수 있는 효과적인 운동 방법이라고 생각된다.

Keywords

Acknowledgement

이 논문은 2021년 대한민국 교육부와 한국연구재단의 지원을 받아 수행된 연구임 (NRF-2021S1A5A8065404)

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