Abstract
The Pemafibrate to Reduce Cardiovascular Outcomes by Reducing Triglycerides in Patients with Diabetes (PROMINENT) trial failed to show the preventive effects of pemafibrate, a triglyceride (TG)-lowering drug, on atherosclerotic cardiovascular disease in patients with type 2 diabetes and dyslipidemia. We recently reported that TG-lowering with pemafibrate did not decrease the calculated small dense (sd) low-density lipoprotein cholesterol (LDL-C), and speculated that the effect of TG on sdLDL-C is attenuated in low LDL-C levels. This report examined this possibility in 1,508 patients with type 2 diabetes and 670 healthy controls. LDL-C ranges were classified as ≤69, 70-99, 100-139 and 140≤ mg/dL. The slope of the regression curve between sdLDL-C and TG was found to flatten as LDL-C decreased; 0.18, 0.13, 0.10 and 0.04 for controls, and 0.18, 0.13, 0.09 and 0.07 for diabetes patients. Correspondingly, the lower the LDL-C range, the lower the sdLDL-C/TG ratio. These results suggest that when LDL-C is tightly controlled, TG-lowering has only a weak inhibitory effect on sdLDL-C.
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