Nephrol Dial Transplant (1999) 14: 2645-2649
© 1999 European Renal Association-European Dialysis and Transplant Association
Antibodies to TammHorsfall protein in endemic nephropathy
1
2
ike
1
ko Kuzmani
1
vori
ec2
eovi
3
evi
1
eljko Krznari
1
1 Department of Internal Medicine,
2 Clinical Institute of Laboratory Diagnosis, Zagreb University School of Medicine and Clinical Hospital Center, Zagreb,
3 General Hospital Dr Josip Ben
evi
', Slavonski Brod, Croatia
Correspondence and offprint requests to:
Bojan Jelakovi
MD PhD, Department of Internal Medicine, Division of Nephrology and Arterial Hypertension, Zagreb University Hospital Center, School of Medicine, University of Zagreb, 10000 Zagreb, Ki
pati
eva 12, Croatia.
Background. The aim of the study was to investigate the possible role of antibodies to TammHorsfall protein (anti-THP) in the early diagnosis of endemic nephropathy (EN).
Methods. Anti-THP (IgA, IgM, IgG classes) antibodies were determined by direct ELISA in a random sample of 159 subjects from the endemic village of Kani
a who were divided into four groups according to the WHO criteria, i.e., `diseased', `suspect', `at risk', and `others'. These groups were compared to subjects from the non-endemic village of Klakar and healthy subjects from Zagreb.
Results. No differences for all the classes of antibody were observed among the groups of subjects from the endemic village of Kani
a (P>0.05) or between these subjects and those from the non-endemic village of Klakar (P>0.05). The values of IgM anti-THP antibodies exceeded those of the IgA and IgG classes in all groups of subjects (P<0.05). The values for all three classes of antibodies were higher in the rural than the urban population (P<0.05).
Conclusion. Determination of anti-THP antibodies was not found to be useful in the early diagnosis of endemic nephropathy. The results suggest that most of the anti-THP antibodies are `natural' and/or cross reactive. The highest values observed in the rural population could probably be explained by exposure to some ubiquitous antigen or more likely they are consequences of fever.
Keywords: antibodies; endemic nephropathy; TammHorsfall protein