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ARTICLE |

Halofuginone, A Specific Collagen Type I Inhibitor, Reduces Anastomotic Intimal Hyperplasia

Eric T. Choi, MD; Allan D. Callow, MD, PhD; Niraj L. Sehgal; David M. Brown, MD; Una S. Ryan, PhD
Arch Surg. 1995;130(3):257-261. doi:10.1001/archsurg.1995.01430030027004.
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Objective:  To determine if halofuginone hydrobromide, a specific type I collagen inhibitor, could prevent intimal hyperplasia at a vascular anastomosis.

Design:  Intimal hyperplasia is characterized by smooth muscle cell proliferation and extracellular matrix accumulation. Halofuginone was used to block collagen production and smooth muscle cell proliferation in cell cultures and in a rabbit model of an end-to-end anastomosis of the right common carotid artery. Animals were fed a nontoxic dose of halofuginone. Eighteen rabbits were fed the inhibitor in a randomized blinded fashion and were examined after 4 weeks by harvesting the arteries after perfusion fixation at physiologic pressures.

Results:  Halofuginone inhibited smooth muscle cell proliferation in vitro and had no effect on cell viability. Morphometric quantification verified that halofuginone treatment significantly attenuated anastomotic intimal thickness.

Conclusion:  Oral administration of halofuginone inhibits intimal hyperplasia at vascular anastomoses. Intimal hyperplasia inhibition by halofuginone may be a therapeutic option for preventing arterial stenosis in vascular surgery.(Arch Surg. 1995;130:257-261)

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