Abstract
Abstract Objective: Uterine leiomyomas are the most prevalent benign tumors in women of reproductive age and the leading indication for hysterectomy in premenopausal women. The underlying causes of uterine leiomyomas are poorly understood, as a result, in part, of the absence of a good model system with which to study these tumors. To overcome this problem, this study was undertaken to develop a murine model for human leiomyoma. Study design: Human leiomyoma tissues were cut into small pieces and some of those were cultured. Tissue pieces and cultured cells were inserted subcutaneously in the flank of each severe immunodeficiency (NOD/SCID gamma, NSG) mice (n=6). Estrogen supplement was needed to maintain serum estrogen level 3 days before the tissue or cultured cells transplantation. Xenograft tissues or cells were harvested after 6wks and analyzed. Results: Six uterine leiomyoma xenografts were successfully established with the tumor tissue derived from six patients. The xenografted human uterine leiomyoma tissues retained their gross appearance with small vessels around the implant tissues and did not change in size up to 6wks after implantation. H&E staining showed that xenografts retained major histologic features of the original leiomyoma. The immunohistochemical staining of SMA(smooth muscle actin) revealed strong cytoplasmic and membranous positivity of spindle tumor cells of xenografts.Conclusions: In summary, transplantation of surgical specimens from uterine leiomyoma patients into NSG mice results in an attractive model for the study of the uterine leiomyoma and may also be useful for analysis or new experimental therapeutic approaches for the treatment of this disease. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 1357. doi:1538-7445.AM2012-1357
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