Can high cholesterol levels make kidney disease worse for patients with IgA nephropathy?
IgA nephropathy (IgAN) is a kidney disease where a protein called IgA builds up in the kidneys, causing inflammation and damage. High cholesterol and other lipid problems (dyslipidemia) are common in people with chronic kidney disease, including IgAN. Research shows that having high cholesterol levels may make kidney disease worse for IgAN patients, leading to faster loss of kidney function and more scarring in the kidneys.
What the research says
A cohort study of 458 patients with primary IgAN found that those with dyslipidemia (defined as total cholesterol ≥5.2 mmol/L, triglycerides ≥1.7 mmol/L, or LDL-C ≥3.4 mmol/L) had worse clinical features, including higher blood pressure, more protein in the urine, poorer kidney function, and more kidney scarring (glomerulosclerosis, tubular atrophy, and interstitial fibrosis) 4. After an average follow-up of about 4.5 years, dyslipidemia was significantly linked to worse kidney survival, meaning these patients were more likely to progress to kidney failure 4. The study also found that specific types of kidney damage, such as tubular atrophy/interstitial fibrosis and arterial intimal fibrosis, were strongly associated with dyslipidemia 4.
Dyslipidemia in chronic kidney disease involves high triglycerides, low levels of good HDL cholesterol, and changes in LDL particles that make them more harmful 9. These lipid abnormalities can damage blood vessels and kidney tissue, accelerating kidney disease progression 9. While the exact mechanisms in IgAN are still being studied, the evidence points to a clear link between high cholesterol and worse kidney outcomes 49.
It is important to note that managing cholesterol with statins (like rosuvastatin) is primarily recommended to reduce cardiovascular risk in people with high cholesterol 1. However, the kidney-protective effects of statins in IgAN are not as well established as other treatments like SGLT2 inhibitors, which have shown benefits for kidney function and proteinuria in IgAN patients 2.
What to ask your doctor
- Should I have my cholesterol and triglyceride levels checked regularly because of my IgA nephropathy?
- What are my current lipid levels, and are they in a range that could be harming my kidneys?
- Would a statin or other cholesterol-lowering medication be appropriate for me to protect my kidneys and heart?
- Are there lifestyle changes, like diet or exercise, that could help improve my cholesterol and slow kidney disease progression?
- How do my cholesterol levels fit into my overall treatment plan for IgA nephropathy?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.