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2014 ; 98
(2
): 229-38
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The role of donor-specific antibodies in acute cardiac allograft dysfunction in
the absence of cellular rejection
#MMPMID24675478
Fine NM
; Daly RC
; Shankar N
; Park SJ
; Kushwaha SS
; Gandhi MJ
; Pereira NL
Transplantation
2014[Jul]; 98
(2
): 229-38
PMID24675478
show ga
BACKGROUND: Acute allograft dysfunction (AAD) is an important cause of morbidity
among heart transplant recipients. The role of donor-specific antibodies (DSAs)
in AAD, with the increasing use of single antigen bead (SAB) assays that have
improved the ability to detect DSA, remains unclear. METHODS: We retrospectively
reviewed 329 heart transplant recipients followed up at our institution. AAD was
defined as an acute decline in left ventricular ejection fraction to less than
50% and a decrement of 10% or higher compared to baseline in the absence of
cellular rejection. Patients with AAD were compared with matched 30 heart
transplant controls. RESULTS: There were 10 (3%) patients with AAD, 4 (40%) had
DSA detectable by SAB assay compared to 16 (53%) controls (P=0.43). Peak DSA mean
fluorescent intensity (MFI) levels were significantly higher at baseline (class I
and class II) in AAD compared to controls. DSA MFI values increased at the time
of AAD and returned to baseline values during follow-up for these patients with
AAD (P<0.05) but remained unchanged over time for controls. Six (60%) patients
with AAD and 1 (3%) control had antibody-mediated rejection (AMR) by
endomyocardial biopsy (P<0.01). There were 4 (40%) patients with AAD with no DSA
or AMR. CONCLUSIONS: AAD after heart transplant is a heterogeneous process
characterized by 1) AMR and DSA, 2) AMR but no DSA, and 3) no AMR or DSA. The
presence of DSA is not associated with AAD, but the quantity assessed by MFI
levels may play a role.
|Acute Disease
[MESH]
|Adult
[MESH]
|Aged
[MESH]
|Allografts
[MESH]
|Biomarkers/blood
[MESH]
|Biopsy
[MESH]
|Coronary Angiography
[MESH]
|Female
[MESH]
|Graft Rejection/blood/diagnosis/*immunology/prevention & control
[MESH]