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October 1991

Effects of Pharmacologic Agents on Human Keloids Implanted in Athymic Mice: A Pilot Study

Author Affiliations

From the Divisions of Otolaryngology-Head and Neck Surgery (Drs Waki and Crumley) and Surgical Oncology (Dr Jakowatz), Department of Surgery, University of California, Irvine; and the Department of Surgery, Veterans Affairs Medical Center, Long Beach, Calif (Drs Waki and Jakowatz). Dr Waki is now with Children's Hospital, Detroit, Mich.

Arch Otolaryngol Head Neck Surg. 1991;117(10):1177-1181. doi:10.1001/archotol.1991.01870220125023

• The treatment of keloids remains difficult. In experimental studies, lathyrogenic agents and colchicine have been shown to be effective in keloid prevention. Recently, a study was published of a new animal model utilizing human keloids implanted in athymic mice. We used the same model to compare the effects of penicillamine, acetylcysteine, colchicine, and triamcinolone acetonide. Unexpectedly, all keloids implanted showed a growth peak at 4 weeks and then regression in size. Histologic sections of the implanted keloids revealed peripheral vascularity, collagen bundles similar to the parent keloids, and no evidence of implant rejection. After 8 weeks, the mice treated with the lathyrogenic agents exhibited a higher rate of regression when compared with the control mice. While triamcinolone acetonide may have prevented keloid implant growth, drug toxic reaction may have been a factor.

(Arch Otolaryngol Head Neck Surg. 1991;117:1177-1181)

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