Abstract
Acidic fibroblast growth factor (aFGF) is a potent growth factor for vascular smooth muscle cells and may mediate vasculopathy in cardiac allografts subjected to chronic immunological injury. Therefore, we examined cardiac expression of aFGF, the number of rejection episodes, and other potential risk factors in 32 heart transplant patients who underwent intravascular ultrasound (IVUS) for detection of cardiac allograft vasculopathy (CAV). As defined by IVUS, CAV was present in 21 patients and absent in 11 patients (follow-up time: 52 +/- 21 vs. 51 +/- 12 months, respectively, P = NS). The level of aFGF in myocardial biopsies obtained at the time of IVUS was measured by semiquantitative reverse transcriptase polymerase chain reaction and expressed as the aFGF:GAPDH ratio. Higher level of aFGF were associated with CAV (mean aFGF:GAPDH ratio was 1.45 +/- 0.99 in patients with vs. 0.18 +/- 0.12 in patients without CAV [P < 0.001]). A strong association was found between high levels of cardiac aFGF and CAV, as 18 of 19 patients (95%) with high levels of aFGF (aFGF:GAPDH > 1) but only 3 of 13 patients with low levels of aFGF had CAV (P < 0.001). The relative risk of high level of aFGF for CAV was 4.1. Untreated low grade rejection (I...Continue Reading
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