Related Experiment Video
Updated: Feb 5, 2026
07:18
Transcutaneous Assessment of Renal Function in Conscious Rodents
Published on: March 26, 2016
12.9K
Increased Phosphaturia Accelerates The Decline in Renal Function: A Search for Mechanisms
Rafael Santamaría1,2,3,4, Juan M Díaz-Tocados2,3, M Victoria Pendón-Ruiz de Mier1,2,3
1Nephrology Service, Reina Sofia University Hospital, Cordoba, Spain.
Scientific Reports
|September 14, 2018
Summary
High phosphate intake in early chronic kidney disease (CKD) accelerates kidney function decline. Increased phosphate excretion (phosphaturia) indicates tubular injury, worsening renal outcomes and cardiovascular health.
Area of Science:
- Nephrology
- Biochemistry
- Pathology
Background:
- High serum phosphate is linked to cardiovascular disease and kidney function decline in chronic kidney disease (CKD).
- Early CKD patients maintain normal serum phosphate via increased phosphate excretion (phosphaturia).
Purpose of the Study:
- To investigate if increased phosphaturia accelerates CKD progression in patients with early CKD (stages 2-3).
- To explore the mechanisms of phosphate-induced renal damage.
Main Methods:
- Prospective follow-up of 95 CKD 2-3 patients with metabolic syndrome for 2.7 years.
- Evaluation of estimated glomerular filtration rate (eGFR) decline and phosphaturia levels.
- In vivo (rat models) and in vitro (cell culture) studies on high phosphate diet effects, oxidative stress, and antioxidant treatment.
Main Results:
- Patients with faster eGFR decline exhibited greater phosphaturia.
- Phosphaturia independently predicted renal function deterioration.
- High phosphate diet induced renal tubular damage, inflammation, oxidative stress, and reduced klotho expression in rats. Antioxidant treatment attenuated these lesions.
Conclusions:
- Phosphate loading in early CKD causes renal tubular injury, accelerating kidney function decline.
- Increased phosphaturia is a marker and contributor to CKD progression.
- Targeting oxidative stress may mitigate phosphate-induced renal damage.
Related Concept Videos
01:18Increasing Function
397
An increasing function exhibits a rise in output values as input values increase. This behavior is depicted graphically as a curve or line that slopes upward from left to right. Such a function satisfies the condition that if x1 < x2, then f(x1) < f(x2), indicating that the function values grow with increasing inputs. This concept is fundamental in understanding growth trends across various domains, such as population dynamics, financial investments, or resource consumption.The...
397
01:58Mechanical Protein Functions
5.6K
Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.
5.6K
01:19Magnetic Declination
467
Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
467
01:58Mechanical Protein Function
2.5K
2.5K
02:07Conservation of Declining Populations
13.4K
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
13.4K
01:24Serum Studies: Renal Function Tests
441
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.
441