HITOMI HIGURASHI’s research while affiliated with Juntendo University and other places

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Publications (2)


Evaluation of qualitative alteration in LDL particles by LDL relative mobility using agarose gel electrophoresis
  • Article

January 2008

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21 Reads

Juntendo Medical Journal

HITOMI HIGURASHI

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NOBUKO IKEDA

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NORIKO MIYAKE

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[...]

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目的: Small-dense LDLは動脈硬化性疾患の重要な危険因子である. しかし, LDL粒子直径 (LDL size) 測定は技術的にいくつかの間題があり, 日常診療の検査として活用されていない. そこで, 操作が簡便なアガロースゲル電気泳動法によるLDL相対移動度 (LDL-relative movement, LDL-RM) を測定し, LDL sizeに代わるLDL粒子の質的変化を評価する方法としての有効性を検討した. 対象: 対象は正常コントロール (NOR), 非糖尿病で高トリグリセリド血症 (NOR+HL), 糖尿病かつ正脂血症 (DM+NOR), 糖尿病かつ高トリグリセリド血症 (DM+HL) の4グループとした. 方法: アガロースゲル電気泳動法によるLDL-RMとポリアクリルアミドグラジエントゲル電気泳動法によるLDL sizeを測定し, 測定結果を4グループで比較した. 結果: LDL sizeはNOR+HLとDM+HLでそれぞれ有意に低値に分布していた (p<0.001). LDL-RMは各群間に統計的有意差があり (p<0.001) DM+HLで最も大きかった. LDL sizeとLDL-RMは各群で強い負の相関があった. 結論: LDL-RMとLDL sizeとの相関は良好であり, LDL-RMの測定によってLDL size測定と同様にLDL粒子の質的変化を評価することが可能であることが示唆された. さらに, LDL-RMはLDLsizeと比較してLDL粒子の質的異常をより鋭敏に反映する可能性が示された.


[Preheparin lipoprotein lipase mass and apolipoproteinC-III ratio helps identify postprandial triglyceride metabolic marker]

December 2007

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3 Reads

Rinsho byori. The Japanese journal of clinical pathology

Serum lipid profiles have usually been evaluated using blood specimen in fasting state. However, postprandial hypertriglyceridemia is important risk factor for atherosclerosis. In the present study, we determined several parameters of triglyceride (TG) metabolism in healthy volunteers. Serum concentrations of TG in fasting state correlated negative the ratio of preheparin serum lipoprotein lipase mass (pLPL) and apoC-III (pLPL/apoC-III) in both fasting (r = -0.771, p < 0.0001) and postprandial (r = -0.640, p < 0.0001) state. To exclude the effect of high density lipoprotein (HDL) in serum, we purified the fraction of TG rich lipoprotein (TRL) using ultracentrifugation method 3 healthy volunteers with postprandial state. The pLPL/apoC-III was reduced constantly during postprandial state in all volunteers. These findings suggest that pLPL/apoC-III may be a useful marker for evaluation of TG metabolism using postprandial blood specimens.