Towards A Local Stimulation Of Natural Bypass Growth - Max Planck Scientists Developed New Treatment For Ischemic Heart Disease

Enhancing the bodies ability to create its own natural bypasses may soon become an alternative to baloon dilatation or bypass surgery. As reported in the February edition of Nature Biotechnology, scientists at the Max Planck Institute for Physiological and Clinical Research in Bad Nauheim/Germany have recently developed a non-invasive method to supply the diseased heart with vessel growth promoting factors making use of the property of microscopic beads to lodge in the peripheral vasculature. These beads are made to slowly release the growth factor without causing any damage.

Different growth factors have already been shown to promote the growth of new vessels. In particular Vascular Endothelial Growth Factor and Fibrobroblast Growth Factors have been subject to extensive research. However, whereas genes or proteins of these growth factors can simply be injected into peripheral tissues this is not possible in case of the heart. A systemic injection may also be deleterious since all of these growth factors have been shown to cause acute vascodilatation and may also promote tumor vessel growth. Attempts of vessel growth promoting therapies in the heart have therefore mainly been limited to cardiac surgery where the gene of a growth factor was given as adjunct to bypass surgery. The new method developed by Arras and collegues on the contrary requires only a routine catheterization procedure. Microscopic beads are injected into the vessel supplying the diseased territory and lodge in the peripheral capillary system whithout causing any damage. At this site they release the growth factor over a period of 7 days.

The major drawback of this method is that the growth factor will only be released within the diseased heart but not at the interface between healthy and diseased heart where large natural bypasses grow from smallest pre

Contact: Wulf D. Ito

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