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Annals of Oncology 13:430-434, 2002
© 2002 European Society for Medical Oncology

Clinical implications of expression of interleukin-8 related to myometrial invasion with angiogenesis in uterine endometrial cancers

J. Fujimoto,+, I. Aoki, S. Khatun, H. Toyoki and T. Tamaya

Department of Obstetrics and Gynecology, Gifu University School of Medicine, Gifu, Japan

Received 6 April 2001; revised 6 September 2001; accepted 18 September 2001.

Background

Angiogenesis is essential for development, growth and advancement of solid tumors. The tumor-associated macrophage has been recognized among inflammatory cells as a candidate for supplying tumor angiogenic factors. Interleukin (IL)-8 is assumed to be a macrophage-derived mediator of angiogenesis. This prompted us to study the clinical implications of macrophage-derived angiogenesis in uterine endometrial cancers.

Patients and methods

Sixty patients underwent curative resection for uterine endometrial cancers. The patient prognosis was analyzed with a 48 month survival rate after curative resection. In tissue of uterine endometrial cancers, the levels of IL-1{alpha}, IL-1ß, tumor necrosis factor-{alpha}, IL-8, basic fibroblast growth factor, vascular endothelial growth factor and platelet-derived endothelial cell growth factor were determined by enzyme immunoassay, and the localization and counts of microvessels and macrophages were determined by immunohistochemistry.

Results

There was a significant correlation between microvessel counts and IL-8 levels and between infiltrated macrophage counts and IL-8 levels in uterine endometrial cancers. Immunohistochemical staining revealed that the localization of IL-8 was similar to that of CD68 for macrophages. IL-8 levels were significantly increased during myometrial invasion from stage Ia to stages Ib through IV.

Conclusions

IL-8 might act as an angiogenic switch in myometrial invasion in stage I uterine endometrial cancers. Furthermore, IL-8 supplied from infiltrated macrophages within and around the tumor might not be a prognostic indicator of advancement, but may be associated with myometrial invasion in uterine endometrial cancers.

Key words: angiogenesis, IL-8, macrophage, myometrial invasion, uterine endometrial cancer


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