Mast cell phenotypes in the allograft after lung transplantation.

Abstract:

BACKGROUND:The burden of mast cell (MC) infiltration and their phenotypes, MC-tryptase (MCT ) and MC-tryptase/chymase (MCTC ), after lung transplantation (LT) has not been evaluated in human studies. METHODS:We reviewed 20 transbronchial lung biopsy (TBLB) specimen from patients with early normal allograft (<6 months post-LT, n=5), late normal allograft (>6 months, n=5), A2 or worse acute cellular rejection (ACR, n=5), and chronic lung allograft dysfunction (CLAD, n=5). Slides were immunostained for tryptase and chymase. Total MC, MCT , MCTC and MCTC to-MCT ratio were compared between the four groups using a generalized linear mixed model. RESULTS:Irrespective of clinicopathologic diagnosis, MC burden tends to increase with time (r(2) =.56, P=.009). MCTC phenotype was significantly increased in the CLAD group (8.2±4.9 cells per HPF) in comparison with the other three groups (early normal: 1.6±1.7, P=.0026; late normal: 2.5±2.3, P=.048; ACR: 2.7±3.5, P=.021). Further, the ratio of MCTC to MCT was significantly increased in CLAD group as compared to the other three groups (P<.001 for all comparisons). CONCLUSIONS:The burden of MC may increase in the allograft as function of time. Patients with CLAD have an increased relative and absolute burden of MCTC phenotype MC. Future studies are needed to confirm these findings and evaluate the potential pathologic role of MCTC in allograft dysfunction.

journal_name

Clin Transplant

journal_title

Clinical transplantation

authors

Banga A,Han Y,Wang X,Hsieh FH

doi

10.1111/ctr.12758

subject

Has Abstract

pub_date

2016-07-01 00:00:00

pages

845-51

issue

7

eissn

0902-0063

issn

1399-0012

journal_volume

30

pub_type

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