Related Experiment Videos
Monocyte function in idiopathic nephrotic syndrome in childhood
The Tohoku Journal of Experimental Medicine
|November 1, 1983
Summary
Idiopathic nephrotic syndrome (INS) in children shows distinct monocyte function differences. Steroid-sensitive INS involves increased NBT reduction and phagocytosis, while steroid-resistant INS shows decreased phagocytosis but enhanced chemotaxis, suggesting varied disease pathways.
Area of Science:
- Pediatric Nephrology
- Immunology
- Cell Biology
Background:
- Idiopathic nephrotic syndrome (INS) is a significant kidney disorder in children.
- Understanding monocyte dysfunction is crucial for INS pathogenesis.
- Previous studies have not fully elucidated the specific functional alterations in monocytes during INS.
Purpose of the Study:
- To investigate and compare monocyte functions in children with steroid-sensitive and steroid-non-sensitive INS.
- To identify potential differences in pathogenesis based on monocyte behavior.
Main Methods:
- Monocyte function was assessed in 42 children (aged 2-17 years) with INS using nitroblue tetrazrazolium (NBT) reduction, immunobead (IB) and yeast cell phagocytosis assays, chemotaxis, and acid alpha-naphthyl acetate esterase (ANAE) staining.
- Functional assays were performed on 112 specimens.
Main Results:
- A dissociation between phagocytosis and chemotaxis was observed in both steroid-sensitive and steroid-non-sensitive INS.
- In steroid-sensitive INS, NBT reduction and phagocytosis were elevated, while chemotaxis was reduced.
- In steroid-non-sensitive INS, IB phagocytosis decreased, but chemotaxis increased.
Conclusions:
- Findings suggest distinct pathogenic mechanisms for steroid-sensitive and steroid-non-sensitive INS.
- Altered monocyte surface receptors and lymphokines may explain the observed phagocytosis-chemotaxis dissociation.