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ISSN: 1233-9687
Polish Journal of Pathology
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2/2015
vol. 66
 
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abstract:

Original paper
Renal interstitial mast cell count is significantly higher in membranoproliferative glomerulonephritis than in class IV lupus nephritis

Karolina Kaczmarczyk
,
Jacek Musiał
,
Jerzy Soja
,
Marek Kuźniewski
,
Agnieszka Gala-Błądzińska
,
Magdalena Białas
,
Krzysztof Okoń

Pol J Pathol 2015; 66 (2): 149-153
DOI: https://doi.org/10.5114/pjp.2015.53011
Online publish date: 2015/07/28
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Lupus nephritis (LN) is a severe manifestation of systemic lupus erythematosus; in LN class IV morphologic lesions may be similar to the lesions in primary membranoproliferative glomerulonephritis (MPGN). The aim of the study was to compare the counts of tryptase-positive and chymase-positive mast cells between LN class IV and MPGN.

The material consisted of 61 renal biopsies: 32 with lupus nephritis class IV, and 29 with membranoproliferative glomerulonephritis. Chymase- and tryptase-positive cells were stained by immunohistochemistry and subsequently counted.

The mean count of chymase-positive mast cells was 21.94 for the whole group, 12.66 for LN class IV and 32.18 for MPGN. The mean count of tryptase-positive cells was 34.94 hpf for the entire group, 22.98 for LN class IV and 48.

13 for MPGN. The differences between lupus nephritis and membranoproliferative glomerulonephritis were significant both for chymase- and tryptase-positive cells. Both chymase-positive MC counts and tryptase-positive MC counts correlated with relative interstitial volume (RIV) (R = 0.35 and R = 0.28, respectively) and with creatinine level (R = 0.35 and R = 0.43, respectively). There was also a significant correlation between age, creatinine level and RIV (R = 0.28 and

R = 0.26, respectively).
keywords:

SLE, lupus nephritis, membranoproliferative glomerulonephritis, mast cell, chymase, tryptase
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