Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Porphyra tenera Extracts on Formation of Collagen Cross-link in Ovariectomized Rats

김 추출물이 갱년기 유도 흰쥐의 Collagen 가교형성에 미치는 영향

  • 한희선 (신라대학교 식품영양학과) ;
  • 배송자 (신라대학교 식품영양학과) ;
  • 김미향 (신라대학교 식품영양학과)
  • Published : 2004.02.01
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Abstract

The purpose of this study was to investigate the effects of Porphyra tenera (PT) extracts on formation of collagen cross-link in ovariectomized rats. From day 3 until 42 after the ovariectomy, Sprague-Dawley female rats were randomly assigned to the following groups : sham-operated rats (Sham), ovariectomized control rats (OVX-control), ovariectomized rats supplemented with PT at 50 mg/kg bw/day (OVX-PT5O), 200 mg/kgbw/day (OVX-PT200). The PT ethanol extracts were orally administrated 1 mL per day. Body weight gain, food intake and food efficiency ratio were significantly different among the groups. The change of collagen content was studied in lung, bone, cartilage and skin of ovariectomized rats. The effects of PT extracts on the amount of collagen were examined by measuring the hydroxyproline, which is a specific amino acid existing in collagen. Pyridinoline is pyridinium cross-link formed in the mature form of collagen from lysine and hydroxylysine residues. Pyridinoline content was analyzed by HPLC. Pyridinoline content in bone collagen was decreased by ovariectomy but supplementation with the PT extracts was similarly increased to Sham. These results suggest that the PT supplementation could decrease bone loss in postmenopausal women.

난소 절제시술 및 폐경으로 인한 여성 호르몬인 estrogen의 감소는 지속되는 골 손실 가속화 등으로 인한 골 질환의 문제점을 가지고 있다. 그러므로 본 연구에서 흰쥐의 난소를 절제하여 인위적인 폐경을 유도하여 골손실의 정도를 결합조직 중의 collagen 함량 및 collagen성숙가교인 pyridinoline함량을 측정하여 그 효과를 검토하였다 난소 절제 후 결합조직 중의 collagen함량은 연골과 피부에서 난소를 절제하지 않은 Sham군에 비하여 낮았으며, 김 추출물 투여군에서 유의적이지는 않으나 높은 경향을 나타내었다. 골 중 collagen성숙가교인 pyrldinoline 함량은 난소절제에 의해 감소하였으나 골에서는 김 추출물 투여에 의해 난소를 절제하지 않은 Sham군과 비슷한 수준으로 증가하였고, 연골에서는 김 추출물 투여에 의해 Sham군과 비슷한 수준으로 감소하는 경향을 나타내어 pyridinoline 생성에 유익한 효과를 나타내었다. 김 추출물이 collagen합성 및 성숙가교인 pyridinoline 생성을 회복시킨 본 실험의 결과로 보아 폐경기여성에게 김 추출물의 섭취는 폐경으로 인한 골손실을 감소시켜 줄 것으로 사료되어지며, 이러한 작용을 나타낸 김의 성분 및 그 기전에 대해서는 앞으로 더 많은 연구가 필요할것으로 생각된다.

Keywords

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