Aims: Our pre-clinical studies demonstrated that G-CSF based stem cell mobilization in combination with genetic or pharmaceutical CD26/DPP-IV inhibition after acute myocardial infarction leads to improved cardiac homing of stem cells, enhanced heart function and increased survival. Thereupon, we initiated a phase III, multi-centre, randomised, placebo-controlled efficacy and safety study (n=100) analyzing the effect of combined application of G-CSF and Sitagliptin, which is a clinically admitted, anti-diabetic DPP-IV-inhibitor, after acute myocardial infarction ("SITAGRAMI-Trial"; EudraCT Number: 2007-003941-34).
Methods: The primary objective of the study is to assess myocardial regeneration by improved myocardial homing of mobilized stem cells, as measured by cardiac function using MRI analysis. In this paper, we report on the study design and a planned first interim-analysis on safety issues without unblinding.
Results: During the first 6 weeks of follow-up, only two major adverse cardiac events occurred (one de novo stenosis and one instent-restenosis) in the first 36 patients. Presumably, they were not related to any study medication. No other side effects like headache, bone pain, hypoglycaemias etc. were observed. Furthermore, no myocardial infarction or death occurred in any patient. Thus, the rate of serious adverse events lay within the expected range.
Conclusions: Our data demonstrate that the combined application of Sitagliptin and G-CSF seems to be safe on the short term and feasible after acute myocardial infarction and may represent a new therapeutic option in future.
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