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Related Concept Videos

Continuous Renal Replacement Therapy01:30

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Continuous Renal Replacement Therapy, also known as CRRT, is a procedural treatment for acute kidney injury (AKI) that gradually removes uremic toxins and fluids while maintaining acid-base balance and stabilizing electrolytes. It is particularly useful for hemodynamically unstable patients. Unlike intermittent hemodialysis, which is faster, CRRT provides a gentler approach over 24 hours, closely mimicking the function of natural kidneys. However, CRRT is not ideal for patients with...
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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.
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Continuous Renal Replacement Therapy (CRRT) is an essential intervention for patients experiencing severe kidney dysfunction. This therapy offers a continuous mechanism for removing fluids and toxins from the bloodstream, leveraging the patient’s blood pressure to facilitate filtration through a specialized filter. This method contrasts with intermittent dialysis, providing a gentler and more consistent removal of waste products and excess fluid, which is particularly beneficial in...
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In patients with renal disease, dosage adjustments are necessary to maintain therapeutic plasma drug concentrations and prevent toxicity or subtherapeutic exposure. Renal impairment alters drug pharmacokinetics, especially in conditions like uremia, where changes such as prolonged elimination half-life and altered apparent volume of distribution can significantly affect drug disposition. These changes require careful modification of the dosing regimen to achieve the desired clinical...
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Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.
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Updated: Dec 25, 2025

Quantitative Real-Time Polymerase Chain Reaction Evaluation of MicroRNA Expression in Kidney and Serum of Mice with Age-Dependent Renal Impairment
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Variations in Circulating Active MMP-9 Levels During Renal Replacement Therapy.

Elena Rodríguez-Sánchez1, José Alberto Navarro-García1, Jennifer Aceves-Ripoll1

  • 1Cardiorenal Translational Laboratory, Institute of Research i+12 (imas12), Hospital Universitario 12 de Octubre, 28041, Madrid, Spain.

Biomolecules
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PubMed
Summary

Active matrix metalloproteinase-9 (MMP-9) levels differ across renal replacement therapies. On-line hemodiafiltration better controls MMP-9 than high-flux dialysis, and levels normalize after kidney transplantation.

Keywords:
dialysishigh-flux dialysiskidney transplantationmatrix metalloproteinase-9on-line hemodiafiltrationrenal replacement therapy

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Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Inflammation Research

Background:

  • Renal replacement therapy (RRT) is associated with chronic inflammation and high mortality.
  • Different RRT modalities may selectively influence inflammation and oxidative stress markers.

Purpose of the Study:

  • To evaluate active matrix metalloproteinase (MMP)-9 levels in patients undergoing high-flux dialysis (HFD), on-line hemodiafiltration (OL-HDF), and kidney transplantation (KT).
  • To assess the impact of RRT modalities and KT on active MMP-9 levels and its correlation with arterial stiffness.

Main Methods:

  • Active MMP-9 was quantified using zymography and ELISA.
  • Measurements were taken before and after dialysis sessions and at multiple time points post-kidney transplantation.
  • Pulse pressure was used as an indicator of arterial stiffness.

Main Results:

  • Active MMP-9 decreased post-dialysis in HFD but was lower pre-dialysis in OL-HDF.
  • Post-kidney transplantation, active MMP-9 increased initially and normalized by three months, correlating with improved renal function.
  • Active MMP-9 correlated with pulse pressure in both dialysis patients and KT recipients.

Conclusions:

  • On-line hemodiafiltration demonstrates superior control of active MMP-9 compared to high-flux dialysis.
  • Active MMP-9 levels normalize post-kidney transplantation with renal function stabilization.
  • Active MMP-9 may serve as a biomarker for arterial stiffness in patients undergoing RRT.