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The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Antioxidative Activity of Streptomyces sp. BH-405 on Macrophage Mediated Modification of Human Low Density Lipoprotein[LDL)

Macrophage 유도 사람 Low Density Lipoprotein[LDL]의 수식에 대한 Streptomyces sp. BH-405 배양액의 항산화 활성

  • Published : 2000.04.01
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Abstract

This study was designed to investigate the antioxidative activity on oxidation of human low density lipoprotein(LDL) of band 2 fractionated from culture broth of Streptomyces sp. BH-405. Antioxidative activity of band 2 obtained from fractionation of BH-405 culture purification was measured against $Cu^{2+}$ mediated human LDL oxidation by thiobarbituric acid reactive substance. $CuSO_4$ mediated oxidation of LDL was degraded at a much higher rate than native LDL. Band 2 at a concentration of 100 or 200 !lg/mL inhibited the oxidation of LDL induced by $CuSO_4$, The formation of conjugated dienes induced in the presence of 5 !1M CuS04 of the mouse macrophage and J744. The electrophoretic mobility of the LDL in addition of $200\mu\textrm{g}$ band 2 in the presence of $5\mu\textrm{m}$ $CuSO_4$ was lower than that of native LDL. LDL modified by copper mediated or cell mediated uptake was degraded by macrophage at much greater than native LDL, and band 2 was found as potential inhibitor of modification of 125I-labelled LDL by macrophage. phage.

해양에서 분리한 Streptomyces sp. BH-405의 배양액으로부터 정제하여 얻은 항산화 활성이 우수한 획분 band 2 에 대하여 사람 Low Density Lipoprotein(LDL)의 산화 억제 효과에 대하여 실험하였다. Streptomyces sp. BH-405의 배양액으로부터 분리 정제한 획분 band 2는 LDL에 대한 $5\mu\textrm{m}$ $CuSO_4$ 의 유도 산화를 측정한 결과 100 및 200 $\mu\textrm{g}$/mL에서 LDL의 산화억제 효과가 높았다. 그리고, band 2를 이용한 macrophage 및 J774 유도 LDL의 수식에 대한 항상화 효과도 native LDL에 비하여 높았다. 이때 같은 농도의 band 2를 첨가하여 산화 LDL의 전기영동의 이동거리를 측정한 결과 native LDL보다는 약간 높았으나 Oxid LDL의 대조군보다는 이동거리가 낮으며 공액2중결합의 생성억제 효과도 있었다. 사람 LDL의 산화에 대하여 macrophage 및 내피세포를 이용하여 125I-LDL 산화에 대하여 band 2를 각각 100 및 200 $\mu\textrm{g}$/mL씩 첨가하여 실험한 결과 사람 LDL의 분해는 대조구보다 낮았으며 용량 의존형의 결과를 나타내었다.

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