Journal
TRANSPLANT IMMUNOLOGY
Volume 65, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.trim.2020.101340
Keywords
Cardiac allograft vasculopathy; Donor specific antibodies; Heart transplant; Intimal thickness
Categories
Funding
- Czech Ministry of Health [16-27465A, IKEM-IN 00023001]
- NIH [R01-EB004640]
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The study found a significant reduction in coronary luminal area and progression in intimal thickness post-heart transplantation, but no clear association between the presence of donor-specific antibodies and MHC-I polypeptide-related sequence A antibodies and intimal thickness progression. However, a significant relationship was observed between donor-specific antibodies and media thickness progression.
Introduction: Recent studies suggested potential positive correlations between HLA-specific antibodies and development of cardiac allograft vasculopathy (CAV). Methods: This prospective two-center study investigated early progression of CAV by coronary optical coherence tomography in 1 month and 12 months after heart transplantation (HTx) in 104 patients. Detection and characterization of donor specific (DSA) and MHC class-I polypeptide-related sequence A (MICA) antibodies were performed before, 1, 6 and 12 months after transplantation. Results: During the first post-HTx year, we observed a significant reduction in the mean coronary luminal area (P < .001), and progression in mean intimal thickness (IT) (P < .001). DSA and anti-MICA occurred in 17% of all patients, but no significant relationship was observed between presence of DSA/anti-MICA and IT progression within 12 months after HTx. In contrast, we observed significant association between presence of DSA (p=0.031), de-novo DSA (p=0.031), HLA Class II DSA (p=0.017) and media thickness (MT) progression. Conclusion: Results of our study did not identify a direct association between presence of DSA/anti-MICA and intimal thickness progression in an early period after HTx. However, we found significant relationships between DSA and media thickness progression that may identify a newly recognized immune-pathological aspect of CAV.
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