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Updated: Apr 17, 2026

Identification of the Source of Secreted Proteins in the Kidney by Brefeldin A Injection
Published on: November 10, 2021
[Importance of annexin V in kidney diseases]
Anna Jakubowska1, Katarzyna Kiliś-Pstrusińska1
1Katedra i Klinika Nefrologii Pediatrycznej Uniwersytetu Medycznego we Wrocławiu.
Abstract:
Annexin V (AnV) belongs to a cytoplasmic calcium binding protein family found in many body tissues, including distal tubule cells and glomerular epithelial cells. The biological role of this protein discovered so far is connected with apoptosis. AnV is considered as an early marker of that process and is used in one of the most frequently applied apoptosis detection methods, consisting in the detection of biochemical and morphological changes in cells. Measuring the AnV level may help understand many renal processes. Elevated AnV levels have been found in both acute and chronic renal conditions. Applying AnV to identify cells in the early phase of apoptosis in acute pyelonephritis caused by Escherichia coli showed that hemolysins of pathogenic bacteria stimulate the death of tubular cells and that the intensification of the process depends on the level of the toxin and its activity time. Studies on the mechanisms of reperfusion injury in acute renal injury have revealed protective activity of a synthetic AnV homodimer with regard to tubular cells. AnV was also used in diabetic nephropathy to study the influence of metabolic disorders on the intensification of apoptosis in renal tubular cells. Additionally, the suitability of AnV measurement as a biochemical marker of atherosclerosis in patients with a chronic renal condition was evaluated. It was also used to study the causes of immunodeficiency in patients diagnosed with the above-mentioned condition. There have been few papers published so far on the significance of AnV in children with renal conditions. The prognostic value of AnV and T cell apoptosis was evaluated in children with nephrotic syndrome.
Insights
Annexin V (AnV) is an early apoptosis marker crucial for understanding renal conditions. Measuring AnV levels aids in diagnosing and managing kidney diseases, including pyelonephritis and diabetic nephropathy.
Area of Science:
- Nephrology
- Cell Biology
- Biochemistry
Background:
- Annexin V (AnV) is a calcium-binding protein implicated in apoptosis.
- AnV serves as an early apoptosis marker, vital for detecting cellular changes.
- Renal processes and various kidney conditions are linked to AnV levels.
Purpose of the Study:
- To explore the role of Annexin V in various renal conditions.
- To evaluate AnV as a marker for apoptosis in kidney diseases.
- To investigate AnV's significance in acute and chronic renal pathologies.
Main Methods:
- Utilized Annexin V detection to identify early apoptosis in tubular cells.
- Assessed AnV levels in patients with acute pyelonephritis, diabetic nephropathy, and chronic renal conditions.
- Examined the influence of bacterial hemolysins and reperfusion injury on tubular cell apoptosis.
- Evaluated AnV as a biomarker for atherosclerosis and immunodeficiency in chronic kidney disease patients.
- Investigated the prognostic value of AnV in pediatric nephrotic syndrome.
Main Results:
- Escherichia coli hemolysins were shown to induce tubular cell death, with intensity dependent on toxin levels and exposure time.
- A synthetic AnV homodimer demonstrated protective effects against tubular cell injury during renal reperfusion.
- AnV measurement showed potential as a biomarker for atherosclerosis and immunodeficiency in chronic renal disease.
- AnV levels correlated with apoptosis intensification in renal tubular cells affected by metabolic disorders in diabetic nephropathy.
- The prognostic value of AnV and T-cell apoptosis was assessed in children with nephrotic syndrome.
Conclusions:
- Annexin V is a significant indicator in various renal conditions, including infections, metabolic disorders, and injury.
- AnV measurement offers potential for early diagnosis, prognosis, and therapeutic evaluation in nephrology.
- Further research into AnV's role, particularly in pediatric renal diseases, is warranted.
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