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Interstitial mononuclear cell infiltration in Heymann nephritis.
C Grönhagen-Riska1, E Honkanen, E von Willebrand
1Minerva Institute for Medical Research, Helsinki, Finland.
Clinical and Experimental Immunology
|November 1, 1987
Summary
Fine-needle aspiration biopsy revealed that T suppressor/cytotoxic cells infiltrate kidneys in autoimmune Heymann nephritis, linking cell-mediated immunity to tubulointerstitial damage and potentially local antibody production.
Area of Science:
- Nephrology
- Immunology
- Pathology
Background:
- Autoimmune Heymann nephritis (HN) is a rat model of membranous glomerulonephritis (MGN).
- Understanding interstitial mononuclear cell infiltration is crucial for diagnosing and treating HN.
Purpose of the Study:
- To investigate interstitial mononuclear cell infiltration in rats during HN development.
- To compare fine-needle aspiration biopsy (FNAB) findings with immunohistochemistry and histopathology.
Main Methods:
- Rats were immunized with tubular brush border antigen to induce HN.
- FNAB was used to assess interstitial cell infiltration.
- Immunohistochemistry identified T helper (T-h) and T suppressor/cytotoxic (T-s) cells.
- Histopathology and immunofluorescence were used for comparison.
Main Results:
- FNAB detected increased blast cells, large granular lymphocytes, and activated lymphocytes post-immunization.
- T-h cell infiltration peaked 3 weeks post-immunization and decreased later.
- T-s cell infiltration significantly increased 2 weeks after booster injection, correlating with interstitial inflammation and MGN.
- Plasmablasts were identified as infiltrating blast cells, suggesting local antibody production.
Conclusions:
- Tubulointerstitial lesions in HN are linked to cell-mediated immunoreactivity.
- Severe interstitial inflammation in HN is associated with T-s cell infiltration.
- Local antibody production may occur in HN, indicated by plasmablast infiltration.