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  • Title: Remnant-like particles (RLP) from NIDDM patients with apolipoprotein E3/3 phenotype stimulate cholesteryl ester synthesis in human monocyte-derived macrophages.
    Author: Saito M, Eto M, Okada M, Iwashima Y, Makino I.
    Journal: Artery; 1996; 22(3):155-63. PubMed ID: 8893973.
    Abstract:
    We tested the ability of remnant-like particles (RLP) from NIDDM patients to stimulate cholesteryl ester synthesis in human monocyte-derived macrophages. Six NIDDM patients were studied together with 7 non-diabetic subjects. All had apolipoprotein (apo) E3/3 phenotype. RLP were isolated using an immunoaffinity gel mixture of anti apo B-100 and anti apo A-1 monoclonal antibodies coupled to Sepharose 4B. Plasma levels of triglyceride, total cholesterol (chol) and high density lipoprotein-chol were not statistically different, but plasma levels of RLP-chol were significantly (p < 0.05) higher in NIDDM patients (10.5 +/- 2.2 mg/dl) than in non-diabetic controls (5.0 +/- 1.7 mg/dl). The effects of RLP from NIDDM patients on macrophage cholesteryl ester synthesis were estimated. 14C-oleate incorporation into cholesteryl esters in macrophages was significantly (p < 0.01) higher in NIDDM patients with apo E3/3 (0.326 +/- 0.037 nmole/mg cell protein) than in non-diabetic controls with apo E3/3 (0.181 +/- 0.011 nmole/ mg cell protein). It is suggested that RLP from NIDDM play a role in the accumulation of cholesteryl esters and are one of the risk factors for the acceleration of atherosclerosis in NIDDM.
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