Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effects of L-Arginine Supplementation and Regular Exercise in D-Galactose Induced Aging Rat Aorta: Study on Inflammatory Factors, Vasodilation Regulatory Factors

노화유도 쥐의 대동맥에서 L-arginine 투여와 규칙적인 운동의 효과: 염증인자와 혈관이완조절 인자의 변화

  • Lee, Jin (Department of Anatomy and Cell Biology, Collage of Medicine, Han-Yang University) ;
  • Kwak, Yi-Sub (Department of Physical Education, Dong Eui University) ;
  • Yoo, Young-June (Department of Physical Education, Sejong University) ;
  • Park, Sok (Department of Physiology, Collage of Medicine, Aju University)
  • 이진 (한양대학교 의과대학 해부세포생물학교실) ;
  • 곽이섭 (동의대학교 체육학과) ;
  • 유영준 (세종대학교 체육학과) ;
  • 박석 (아주대학교 의과대학 생리학교실)
  • Received : 2011.07.09
  • Accepted : 2011.09.23
  • Published : 2011.10.31
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Abstract

The purpose of this study was to identify the effects of an L-arginine supplementation and regular exercise training on NF-${\kappa}B$, TNF-${\alpha}$, iNOS, Cav-1, eNOS and Ang II in the aortas of D-galactose (D-gal) induced aging rats. The male Strague-Dawley rats were treated with a D-galactose aging inducing agent; the D-gal injection (50 mg/kg) was given intraperitoneally for 12 wk. Experimental groups were divided into five groups: (1) Young control group (Y-Con, n=8), (2) Aging control group (A-Con, n=8), (3) Aging exercise group (A-Ex, n=8), (4) Aging exercise group with L-arginine supplementation group (A-Ex+A, n=8), and (5) Aging with L-arginine supplementation group (A-A, n=8). The exercise consisted of running on a treadmill for 60 min/day at 20 m/min for 6 day/wk, at 0% gradient for 12 wk. The L-arginine supplementation was given orally at a dose of 150 mg/kg/day for 12 wk. The findings of this study were as follows: 1. NF-${\kappa}B$, TNF-${\alpha}$, iNOS, Cav-1 and Ang II proteins in the aortas of D-gal induced rats were significantly increased, however, L-arginine supplementation and regular exercise resulted in a significant inhibition in the expression of NF-${\kappa}B$, TNF-${\alpha}$, iNOS, Cav-1 and Ang II proteins. 2. eNOS protein in the aortas of D-gal induced rats was significantly decreased, however, L-arginine supplementation and regular exercise resulted in a significant increase in the expression of eNOS proteins. In conclusion, the findings of the present study reveal that L-arginine supplementation alone or regular exercise alone or in combination with L-arginine supplementation for 12 wk increases anti-inflammatory effects by decreasing NF-${\kappa}B$, TNF-${\alpha}$, and iNOS protein expressions within the aortic tissue. In addition, L-arginine supplementation alone or regular exercise alone or in combination with L-arginine supplementation may prevent endothelial function by up-regulation of eNOS protein in the aortas of D-gal induced aging rats.

이 연구는 L-arginine과 규칙적인 운동이 D-galctose (D-all)투여로 유발된 노화흰쥐의 대동맥에서 발현되는 NF-${\kappa}B$, TNF-a, iNOS, Cav-1, eNOS, Ang II의 변화양상을 관찰하는데 그 목적을 두고 있다. 노화유도 모델 쥐는 D-gal (50 mg/kg)를 숫컷 Strague-Dawley (SD)계 흰쥐의 복강에 1일 1회 총 12주간 투여하여 생산하였으며, 이 실험의 집단은 젊은 대조군(Y-con, n=8), 노화 대조군(A-con, n=8), 노화 운동군(A-Ex, n=8), 노화운동+아르기닌군(A-Ex+A, n=8), 노화 아르기닌군(A-A, n=8)의 5군으로 분류하여 실시하였다. L-arginine은 1일 150 mg/kg씩 총 12주간 경구투여 하였다. 운동방법은 트레이드운동으로 1일 60분씩 20 m/min 속도에서 훈련하였다. 분석결과 1) 유도된 노화군에서 NF-${\kappa}B$, TNF-a, iNOS, Cav-1, 그리고 Ang II 단백질의 발현은 젊은 대조군에 비해 유의하게 증가하였다. 그러나 규칙적인 운동과 L-아르기닌군에서 NF-${\kappa}B$, TNF-a, iNOS, Cav-1, 그리고 Ang II 단백질의 발현은 노화 대조군에 비해 유의하게 감소하였다. 2) 유도된 노화군에서의 eNOS 단백질 발현은 젊은 대조군에 비해 유의하게 감소하였다. 그러나 규칙적인 운동과 L-아르기닌군은 eNOS 단백질의 발현을 더욱 증가시킨 것으로 나타났다. 이상의 결과를 종합하면 12주간 L-아르기닌 투여와 규칙적인 운동 그리고 복합처치는 염증인자와 관련된 단백질인 NF-${\kappa}B$, TNF-a, iNOS 단백질들의 발현을 억제시켜 항염증효과를 보여주었으며, 혈관내피의 기능향상과 관련된 eNOS의 발현을 증가시키는데 긍정적인 역할을 수행할 것으로 기대된다.

Keywords

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