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Effects of Long-Term Administration of Saengshik on Growth Increment, BMD and Blood IGF-1 Concentration in Growing Rats

장기간의 생식 섭취가 성장기 흰쥐의 성장, 골밀도 및 혈중 IGF-1의 농도에 미치는 영향

  • Published : 2007.04.30

Abstract

This study was performed to investigate the effect of long-term administration of Saengshik on growth parameters of growing rats. Male Sprague-Dawley rats were fed on AIN-93G basal diets for 12 weeks and assigned to the following groups: rats administrated orally with Saengshik at the dose of 1g/kg/day (1xJS ), 2g/kg/day (2xJS), 4g/kg/day (4xJS) and distilled water (Control). Rats were sacrificed at 4, 8, 12 weeks after oral administration. Bone mineral density (BMD) and bone mineral contents (BMC) were measured by PIXImus densitometry and serum insulin-like growth factor-1 (IGF-1) concentration were determined by using EIA method. Body weight and food intake did not show significant changes within groups for 12 weeks. Physical longitudinal growth indexes, body length and femur length were significantly increased in Saengshik-administered groups at 12 weeks, in which BMD and BMC also significantly increased. Also, in blood IGF-1 level, Saengshik-administered groups were remarkedly higher than control group at 4 week (p<0.001), in which significantly higher at 8 week and 12 week. These results suggest a close relation between administration of Saengshik and increment of longitudingal bone growth. Therefore, as the result of this study, it could be expected that the administration of Saengshik for 12 weeks is helpful to the increase of longitudinal growth and growth factors in rats. Furthermore, we propose that the consumption of Saengshik as dietary supplementation may promote to increase in longitudinal bone growth in growing children.

생식의 섭취가 실험동물의 길이성장 및 균형성장에 미치는 효능을 평가하기 위하여 12주간 생식을 1g/kg/day(1xJS), 2g/kg/day(2xJS) 및 4g/kg/day/(4xJS)의 용량으로 경구투여한 후 처치시점 4주, 8주 및 12주에 각각 희생시켜 성장에 관련된 요인들을 측정하였다 실험동물의 식이섭취량, 체중증가량 및 장기무게는 생식을 경구투여한 실험군과 대조군 간에 유의적인 차이가 없었으며, 공복 시 혈중 AST와 ALT의 농도 역시 군 간에 유의적인 차이를 보이지 않았고 모두 정상수치를 기록하였다. 실험동물의 신장 및 대퇴골 길이의 변화는 12주간의 실험기간 중 생식을 경구투여한 실험군이 대조군에 비하여 평균적으로 증가하였으며 특히, 처치시점 12주에서는 신장과 대퇴골 길이의 변화가 생식을 경구투여한 모든 실험군이 대조군에 비하여 유의하게 증가한 것으로 관찰되었다. BMD와 BMC의 결과에서도 BMD의 경우 4xJS군, BMC의 경우 1xJS군과 4xJS군이 대조군에 대하여 유의한 증가를 나타내었으나, 생식 투여량에 대한 농도의존적인 경향은 나타나지 않았다. 또한, 성장인자의 하나인 혈중 IGF-1의 경우 처치시점 4주에서 생식을 경구투여 한 모든 실험군이 유의적인 증가를 나타내었으며, 8주 이상에서는 4xJS군에서만 유의적인 증가가 나타났다. 이상의 결과에서 성장기에 장기적인 생식의 보충 섭취는 실험동물의 골성장을 통한 성장 발육에 도움을 준 수 있을 것으로 사료된다.

Keywords

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