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Updated: Dec 5, 2025
Mouse Model of Alloimmune-induced Vascular Rejection and Transplant Arteriosclerosis
Published on: May 17, 2015
Donor specific anti-HLA antibodies and cardiac allograft vasculopathy: A prospective study using highly automated 3-D
Michal Pazdernik1, Helena Bedanova2, Zhi Chen3
1Department of Cardiology, IKEM, Prague, Czech Republic; Department of Cardiology, 2nd Medical School, Charles University, University Hospital Motol, Prague, Czech Republic.
Insights
Donor-specific antibodies (DSA) did not correlate with intimal thickness progression in early cardiac allograft vasculopathy (CAV) after heart transplantation. However, DSA was linked to media thickness progression, suggesting a new immune-related aspect of CAV.
Area of Science:
- Cardiology
- Immunology
- Transplantation
Background:
- Cardiac allograft vasculopathy (CAV) is a major long-term complication after heart transplantation (HTx).
- Previous studies suggested a correlation between HLA-specific antibodies and CAV development.
- Early detection and characterization of immune responses are crucial for managing CAV.
Purpose of the Study:
- To investigate the early progression of CAV using coronary optical coherence tomography.
- To determine the relationship between donor-specific antibodies (DSA), anti-MICA antibodies, and CAV progression within the first year post-HTx.
Main Methods:
- Prospective, two-center study of 104 heart transplant recipients.
- Coronary optical coherence tomography performed at 1 and 12 months post-HTx.
- Detection of donor-specific antibodies (DSA) and anti-MICA antibodies at multiple time points.
Main Results:
- Significant reduction in coronary luminal area and progression of intimal thickness observed within the first year.
- DSA and anti-MICA antibodies were present in 17% of patients.
- No significant association found between DSA/anti-MICA and intimal thickness progression.
- Significant association observed between DSA (including de-novo and HLA Class II DSA) and media thickness progression.
Conclusions:
- Early CAV progression is characterized by intimal thickness increase and luminal area reduction.
- The presence of DSA or anti-MICA antibodies was not directly associated with early intimal thickness progression.
- DSA showed a significant association with media thickness progression, indicating a potential novel immune-mediated pathway in CAV pathogenesis.
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.
