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Related Concept Videos

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Diabetic Nephropathy

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Related Experiment Video

Updated: Jul 6, 2026

Isolation, Expansion, and Adipogenic Induction of CD34+CD31+ Endothelial Cells from Human Omental and Subcutaneous Adipose Tissue
10:28

Isolation, Expansion, and Adipogenic Induction of CD34+CD31+ Endothelial Cells from Human Omental and Subcutaneous Adipose Tissue

Published on: July 17, 2018

Glomerular CD34 expression in short- and long-term diabetes.

Luz Marina Acevedo1, Irene Londono, Malika Oubaha

  • 1Department of Pathology and Cell Biology, Université de Montréal, Montréal QC H3T 1J4, Canada.

The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
|March 6, 2008
PubMed
Summary

This study explored how CD34 expression changes in the kidneys of diabetic and aged animals. Researchers used immunocytochemistry and immunoblotting to examine glomerular cells in young and old diabetic and healthy rats. They found that both diabetes and aging increase CD34 expression, but the effects are additive rather than synergistic. CD34 labeling was most prominent in endothelium and mesangial cells, with less in podocytes. Western blotting confirmed these findings. The results suggest that CD34 may play a role in glomerular dysfunction. Early diabetes changes in CD34 expression resemble those in aging, supporting the idea that diabetes accelerates aging-related changes.

Keywords:
CD34 expressionrenal glomerulidiabetic kidney diseaseaging and diabetes

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Area of Science:

  • Renal physiology and pathology
  • Diabetes and aging research
  • Cell adhesion molecule biology

Background:

Aging and diabetes are both linked to increased adhesion molecule expression. Adhesion molecules play a role in endothelial dysfunction and glomerular permeability changes. Prior research has shown that these molecules are important in vascular health. No prior work had resolved how CD34 expression changes with diabetes and aging. This gap motivated the current study. Understanding CD34's role could clarify glomerular dysfunction mechanisms. CD34 is a sialomucin-type adhesion molecule. Its expression in renal cells remains poorly understood in diabetic and aged models.

Purpose Of The Study:

This study aimed to evaluate CD34 expression in glomerular cells of diabetic and healthy animals. Researchers focused on short- and long-term diabetes effects. They compared young and old animals to assess age-related changes. The goal was to determine if diabetes and aging have synergistic effects. CD34 was chosen due to its role in endothelial dysfunction. The study used immunocytochemistry and immunoblotting. Researchers wanted to clarify if diabetes accelerates aging-related changes. They aimed to provide evidence for CD34's involvement in glomerular alterations.

Main Methods:

The study used colloidal gold immunocytochemistry and immunoblotting. Researchers analyzed renal glomerular cells from diabetic and healthy animals. They examined both young and old rats to assess age effects. CD34 labeling was observed in plasma membranes of endothelium and mesangial processes. Podocyte membranes showed less labeling. Immunogold labeling was quantified to compare diabetic and healthy groups. Western blotting confirmed results from immunocytochemistry. The methods allowed for detailed visualization and quantification of CD34 expression.

Main Results:

Diabetic animals showed increased CD34 labeling compared to healthy young rats. Both short- and long-term diabetes caused similar increases. Old diabetic and healthy rats had similar CD34 labeling levels. This suggests diabetes and aging effects are additive but not synergistic. Podocyte labeling was less intense than in endothelium and mesangial cells. Western blotting supported immunocytochemical findings. CD34 expression increases in glomeruli with diabetes and aging. The pattern of expression suggests a role in glomerular dysfunction.

Conclusions:

The study found that diabetes and aging both increase CD34 expression in glomeruli. The effect of diabetes and aging appears additive but not synergistic. CD34 labeling was most prominent in endothelium and mesangial cells. Podocytes showed lower but detectable labeling. The authors suggest CD34 may be involved in glomerular alterations. Early diabetes changes resemble those in aging. This supports the idea that diabetes accelerates aging-related changes. The findings highlight CD34 as a potential marker for glomerular dysfunction.

Diabetes and aging both increase CD34 expression in glomeruli, but their effects are additive, not synergistic.

Endothelium and mesangial processes show the highest CD34 labeling, with podocytes labeled to a lesser extent.

This method allows detailed visualization of CD34 localization in glomerular cells at the subcellular level.

Western blotting confirms immunocytochemical results by quantifying CD34 protein levels in isolated glomerular fractions.

Early diabetes changes in CD34 expression resemble those in aging, supporting the idea that diabetes accelerates aging processes.

The increased CD34 expression may reflect its involvement in glomerular alterations related to diabetes and aging.