Decrease in glomerular filtration rate by plasma low-density lipoprotein cholesterol in subjects with normal kidney...

Area of Science:

• Cardiovascular Medicine
• Nephrology
• Metabolic Syndrome

Background:

• Arteriolosclerosis, affecting small arteries, is not fully understood in relation to plasma low-density lipoprotein cholesterol (LDL-C).
• Estimated glomerular filtration rate (e-GFR) serves as a key indicator of renal arteriole and capillary function.

Purpose of the Study:

• To investigate the relationship between plasma LDL-C and e-GFR.
• To assess the impact of plasma LDL-C on renal microvascular function.
• To infer the potential role of LDL-C in the progression of arteriolosclerosis.

Main Methods:

• Comparison of coronary risk factors (blood pressure, lipids, glucose) across four e-GFR groups (Control, Group 1-3).
• Analysis of 7522 subjects (4602 male, 2920 female) from a health evaluation center.
• Stratification by age (fifties) and sex to analyze plasma LDL-C levels in relation to e-GFR.

Main Results:

• Significantly higher plasma LDL-C levels were observed in lower e-GFR groups (Group 2-3 for males, Group 1-3 for females) compared to controls.
• These associations were pronounced in individuals in their fifties.
• Elevated BMI and waist circumference were noted in males with lower e-GFR, but blood pressure and fasting glucose were not significantly different across groups.

Conclusions:

• High plasma LDL-C is identified as a primary risk factor contributing to reduced GFR.
• This reduction is likely due to impaired function of renal arterioles and capillaries.
• The findings are significant for individuals with normal kidney function based on urinalysis and creatinine levels.