Abstract: A method for measuring cholesterol in remnant-like lipoprotein in a sample, by a more convenient operation and with high sensitivity, and a reagent for the measurement are provided. A method for measuring cholesterol in remnant-like lipoprotein, the method comprising subjecting a test sample containing lipoproteins to the action of a cholesterol esterase and a cholesterol oxidase or cholesterol dehydrogenase, and measuring the hydrogen peroxide or reduced coenzyme generated by the enzymatic reaction, wherein a surfactant having a benzenesulfonic acid structure in the molecule or a polyacrylic acid-based polymeric surfactant is used.

Abstract: A high-density lipoprotein-reactive peptide or a foam cell-reactive peptide as set forth in the following (a) or (b): (a) a peptide comprising the amino acid sequence represented by SEQ ID NO: 1; and (b) a peptide comprising an amino acid sequence derived from the amino acid sequence as specified in the above (a) by substitution, deletion, addition, or insertion of one or more amino acid residues and being capable of specifically binding to high-density lipoprotein cholesterol or withdrawing cholesterol from foam cells. Thus, peptides having novel amino acid sequences and being capable of specifically binding to HDL cholesterol or withdrawing cholesterol from foam cells are provided. These peptides are useful as drugs for various diseases caused by arteriosclerosis, lipid metabolic errors, and peripheral cholesterosis.

Abstract: A high-density lipoprotein-reactive peptide or a foam cell-reactive peptide as set forth in the following (a) or (b): (a) a peptide comprising the amino acid sequence represented by SEQ ID NO: 1; and (b) a peptide comprising an amino acid sequence derived from the amino acid sequence as specified in the above (a) by substitution, deletion, addition, or insertion of one or more amino acid residues and being capable of specifically binding to high-density lipoprotein cholesterol or withdrawing cholesterol from foam cells. Thus, peptides having novel amino acid sequences and being capable of specifically binding to HDL cholesterol or withdrawing cholesterol from foam cells are provided. These peptides are useful as drugs for various diseases caused by arteriosclerosis, lipid metabolic errors, and peripheral cholesterosis.