Abstract
Plasma levels of platelet-derived growth factor (PDGF) were measured in 24 normal control subjects, 31 patients with stable angina pectoris, 25 patients with unstable angina pectoris, and 31 patients with acute myocardial infarction (AM) by a sensitive direct radioimmunoassay. The plasma PDGF level in normal control subjects was 273 ± 25 pg/ml; there was no significant correlation between the plasma PDGF level and age. Plasma PDGF levels in patients with unstable angina pectoris and acute myocardial infarction were significantly lower than those in normal control subjects and patients with stable angina pectoris ( p < 0.05). In patients with acute myocardial infarction the plasma PDGF level in the chronic phase was significantly higher than that in the acute phase ( p < 0.05). These observations raise the possibility that PDGF is involved in the pathophysiology of ischemic heart disease.
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