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Updated: Jul 13, 2026
Cardiac Loading using Passive Left Atrial Pressurization and Passive Afterload for Graft Assessment
Published on: August 2, 2024
Donor myocardial HIF-1alpha is an independent predictor of cardiac allograft dysfunction: a 7-year prospective,
S Aharinejad1, R Schäfer, K Krenn
1Department of Cardiothoracic Surgery, Medical University of Vienna, Vienna, Austria. seyedhossein.aharinejad@meduniwien.ac.at
Insights
Hypoxia-inducible factor-1 alpha (HIF-1alpha) shows potential as a predictive marker for primary graft dysfunction (PGD) in heart transplantation. Measuring HIF-1alpha levels in donor hearts may help identify PGD risk.
Area of Science:
- Cardiovascular Biology
- Transplantation Immunology
- Molecular Medicine
Background:
- Primary graft dysfunction (PGD) is a significant complication following heart transplantation.
- The molecular mechanisms underlying the cardiac response to transplantation-induced stress and their link to PGD are not fully understood.
Purpose of the Study:
- To investigate the cardiac molecular response to transplantation-induced stress.
- To identify potential biomarkers for predicting primary graft dysfunction (PGD).
Main Methods:
- cDNA array analysis identified key mediators including HIF-1, EGR-1, NAB-2, VEGF-A, and uPA.
- Real-time RT-PCR was used to quantify mRNA expression in left ventricular biopsies from 200 donors.
- Measurements were taken before aortic cross-clamping and at various reperfusion time points (10, 30, 60 min).
Main Results:
- Hypoxia-inducible factor-1 alpha (HIF-1alpha) expression at two time points was significantly associated with PGD.
- HIF-1alpha levels at aortic cross-clamping (78% sensitivity, 83% specificity) and 10-min reperfusion (85% sensitivity, 83% specificity) effectively identified PGD.
- Other factors were tested, but HIF-1alpha showed the strongest predictive potential.
Conclusions:
- HIF-1alpha is a promising predictive marker for PGD in heart transplantation.
- Prospective evaluation is necessary to confirm the predictive value of HIF-1alpha for PGD.
Abstract:
Knowledge on interplay between the cardiac molecular response to transplantation-induced stress and primary graft dysfunction (PGD) is limited. A cDNA array identified HIF-1, EGR-1, NAB-2, VEGF-A and uPA as mediators of cardiac tissue response to transplantation-induced stress. mRNA expression of these molecules was measured in left ventricular biopsies from 200 donors before and after aortic cross-clamping and at 10-, 30- and 60-min reperfusion by real-time RT-PCR. HIF-1alpha expression at two time points was significantly associated with PGD, as shown by univariate analysis, receiver operating characteristic curve and multivariate logistic regression. At a cut-off level of 200 arbitrary units, HIF-1alpha after aortic cross-clamping in donors (78% sensitivity, 83% specificity) and at 10-min reperfusion (85% sensitivity, 83% specificity) identified PGD. HIF-1alpha demonstrates the potential to be a predictive marker for PGD; however, as multiple factors were tested at different time points, prospective evaluation is clearly necessary to confirm this observation.
