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Related Concept Videos

Kidney Structure01:45

Kidney Structure

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The kidneys are two large bean-shaped organs located in the upper abdomen. They filter the blood several times a day to remove toxins and rebalance water and electrolytes of the circulatory system via the renal veins. The kidneys receive blood directly from the heart via the renal arteries. These arteries enter the kidney at the hilum, the concave surface of the bean, where they branch and divide into smaller vessels and capillaries.
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Factors Affecting Renal Clearance: Renal Impairment01:17

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Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
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Hormonal Regulation01:33

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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External Anatomy of the Kidney01:21

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The kidneys are a pair of bean-shaped organs in the human body that play a critical role in maintaining overall health. They filter out waste products from the blood, regulate blood pressure, maintain electrolyte balance, and stimulate the production of red blood cells.
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Nephrons01:10

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The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
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5/6 Nephrectomy Using Sharp Bipolectomy Via Midline Laparotomy in Rats
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Kidney function in acromegaly: evidence from a long-term observational study.

Giona Castagna1,2, Silvia Ippolito1, Sara Cassibba1

  • 1Endocrinology and Diabetes Unit, ASST Papa Giovanni XXIII, Bergamo, Italy.

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Summary

Acromegaly treatment normalizes kidney hyperfiltration, but long-term decline persists, especially with diabetes. Surgery offers a faster initial improvement in kidney function for patients with acromegaly.

Keywords:
AcromegalyCKDGHIGF-1KidneyeGFR

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Area of Science:

  • Endocrinology
  • Nephrology
  • Metabolic Disorders

Background:

  • Growth hormone (GH) and insulin-like growth factor 1 (IGF-1) regulate kidney development and function.
  • Acromegaly, marked by GH excess, causes renal hypertrophy and hyperfiltration.
  • Long-term renal risks in treated acromegaly patients are not fully understood.

Purpose of the Study:

  • To assess long-term renal function changes in acromegaly patients.
  • To evaluate the impact of treatment on kidney function over time.
  • To identify factors associated with renal function decline in acromegaly.

Main Methods:

  • Analysis of 80 acromegaly patients with recorded creatinine values.
  • Calculation of estimated glomerular filtration rate (eGFR) using CKD-EPI 2021 formula.
  • Evaluation of acute (12-month) and chronic (mean 11.28 years) eGFR slopes; multivariable regression analysis.

Main Results:

  • eGFR decreased acutely post-treatment, with a larger drop in surgically treated patients (-15.15 mL/min/1.73 m²).
  • Mean chronic eGFR loss was -1.28 mL/year.
  • Age and diabetes were significantly associated with greater eGFR decline (p<0.01).

Conclusions:

  • Acromegaly-related renal hyperfiltration typically normalizes post-treatment, particularly after surgery.
  • Chronic kidney disease is prevalent in acromegaly, exacerbated by diabetes.
  • Diabetes in acromegaly patients increases cardiovascular risk.