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Published on: May 7, 2019
In situ lymphoproliferation in renal transplant biopsies
H Robertson1, J Wheeler, V Thompson
1Department of Microbiology, Medical School, University of Newcastle upon Tyne, UK.
Histochemistry and Cell Biology
|October 1, 1995
Summary
This study introduces a new method to identify proliferating T cells (CD3) and epithelial cells in kidney tissue. The findings reveal T cell proliferation within tubules during acute renal allograft rejection.
Area of Science:
- Nephrology
- Immunology
- Histopathology
Background:
- Acute renal allograft rejection involves complex immune responses within the kidney.
- Identifying specific cell types and their proliferation is crucial for understanding rejection mechanisms.
- Current methods may lack the precision to differentiate between proliferating and quiescent T cells in situ.
Purpose of the Study:
- To develop and validate a double immunohistochemical staining technique for simultaneous identification of T cells (CD3) and proliferating cells (Ki67) in renal tissue.
- To precisely locate proliferating and quiescent T cells within the kidney microenvironment.
- To correlate T cell proliferation and tubular epithelial cell proliferation with the severity of acute renal allograft rejection.
Main Methods:
- A double immunohistochemical labeling procedure was optimized for paraffin-embedded renal tissue.
- CD3 antibody was used to identify T cells, and Ki67 antibody for cell proliferation.
- Periodic acid-Schiff (PAS) counterstaining was employed to visualize basement membranes for precise cellular localization.
- The method was applied to routine transplant biopsies for preliminary evaluation.
Main Results:
- The technique successfully identified proliferating and quiescent T cells in situ, distinguishing their location relative to basement membranes.
- Proliferating tubular epithelial cells were also clearly identified.
- Significant correlations were observed between the histological rejection grade and the mean number of intratubular T lymphocytes.
- A correlation was found between tubular epithelial cell proliferation and intratubular T lymphocyte proliferation.
Conclusions:
- T lymphocytes proliferate within the tubular compartment during acute renal allograft rejection.
- The developed method allows for unequivocal identification and localization of proliferating T cells and epithelial cells in renal biopsies.
- Tubular epithelial cell proliferation may represent a response to local damage induced by infiltrating T lymphocytes during rejection.
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