Renal consequences of obesity

Area of Science:

• Nephrology
• Cardiology
• Endocrinology

Background:

• Rising global obesity rates are linked to increased metabolic and cardiovascular diseases.
• Obesity is a major risk factor for arterial hypertension, contributing to 65-75% of cases.
• Understanding the link between obesity and kidney dysfunction is critical.

Purpose of the Study:

• To review the mechanisms connecting obesity with altered kidney function.
• To elucidate how excess weight impacts renal physiology and contributes to disease.

Main Methods:

• Review of current scientific evidence and literature.
• Analysis of physiological pathways linking obesity, hypertension, and kidney injury.

Main Results:

• Obesity-induced hypertension involves impaired renal pressure natriuresis due to increased sodium reabsorption.
• Mechanisms include activation of renin-angiotensin and sympathetic nervous systems, endocrine factors (leptin), and physical compression of kidneys.
• Sustained obesity leads to hyperinsulinemia, hyperfiltration, glomerular hypertrophy, and focal segmental glomerulosclerosis.
• Kidney injury results in reduced glomerular filtration rate, elevated blood pressure, and increased cardiovascular risk.

Conclusions:

• Weight reduction can decrease proteinuria.
• Advocating for renoprotective therapies (ACE inhibitors, statins) alongside lifestyle changes is essential for obese hypertensive patients.
• Renal protection is key to mitigating cardiovascular complications in obesity.