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Hypertension, asymmetric renal parenchymal defect, sterile urine, and high E. coli antibody titre
Insights
Four children with kidney damage, high blood pressure, and sterile urine showed signs of "abacterial pyelonephritis." This may stem from early childhood Escherichia coli infections, potentially involving autoantibodies or bacterial remnants.
Area of Science:
- Pediatric Nephrology
- Immunology
- Infectious Diseases
Background:
- Asymmetric renal parenchymal reduction, hypertension, and sterile urine suggest chronic kidney damage.
- Abacterial pyelonephritis is a condition mimicking infection without bacterial presence.
- Early childhood infections can lead to long-term renal sequelae.
Purpose of the Study:
- To investigate the etiology of abacterial pyelonephritis in children.
- To explore the role of Escherichia coli in chronic kidney damage.
- To understand the immunological mechanisms behind renal parenchymal reduction.
Main Methods:
- Case series analysis of four pediatric patients over 11 years.
- Review of radiological and histological findings.
- Serological testing for antibody titers against Escherichia coli.
Main Results:
- All four children presented with asymmetric renal parenchymal reduction and arterial hypertension.
- Elevated antibody titers to Escherichia coli were observed in all patients.
- Findings were consistent with abacterial pyelonephritis potentially linked to early childhood infections.
Conclusions:
- Escherichia coli infection may play a role in the pathogenesis of abacterial pyelonephritis.
- High antibody titers could indicate persistent bacterial antigens, variants, or autoimmune cross-reactivity.
- Further research is needed to elucidate the precise mechanisms of renal damage in these cases.
Abstract:
During an 11-year period four children were seen with asymmetric renal parenchymal reduction, arterial hypertension, and sterile urine. The history and radio-logical or histological findings, or both, were consistent with "abacterial pyelonephritis" induced by bacterial infection in early childhood. All four had raised antibody titres to Escherichia coli. Three possibilities may explain the high antibody titres and insidious course of the renal damage-the presence of bacterial variants or amorphous bacterial antigen in the kidneys or the fact that because of cross-reactivity between certain E. coli O antigens and renal tissue the "E. coli antibodies" were, in fact, autoantibodies.