Short synthetic endostatin peptides inhibit endothelial migration in vitro and endometriosis in a mouse model

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Objective: To determine the active peptide regions inside the angiogenesis inhibitor endostatin that can inhibit endothelial migration in vitro and also inhibit endometriosis in a mouse model. Design: Pharmacologic intervention in a surgically induced mouse model of endometriosis and endothelial migration assay. Setting: Animal research and laboratory facility. Subject(s): Eight-week-old, female C57BL/6 mice and human microvascular endothelial cells. Intervention(s): Eight overlapping synthetic peptides were tested for inhibitory potential on endothelial migration in vitro. The peptides with significant activity then were given for 4 weeks to mice after implantation of autologous endometrium. Main Outcome Measure(s): Inhibition of vascular endothelial growth factor-induced endothelial migration for in vitro studies. In vivo studies examined the growth rate of endometriotic lesions after 4 weeks of treatment, as well as the effect on estrous cycling and ovulation as assessed by corpus luteum formation. Result(s): The N-terminal mP-1 peptide and the internal mP-6 peptide inhibited endothelial migration in a dose-dependent manner. Additionally, both synthetic peptides suppressed growth of endometriotic lesions significantly in vivo. However, estrous cycling and corpus luteum formation were normal in both groups. Conclusion(s): Short endostatin fragments may be promising as a new, nontoxic therapeutic strategy for the treatment of endometriosis without inhibition of normal estrous cycles. ©2006 by American Society for Reproductive Medicine.




Becker, C. M., Sampson, D. A., Short, S. M., Javaherian, K., Folkman, J., & D’Amato, R. J. (2006). Short synthetic endostatin peptides inhibit endothelial migration in vitro and endometriosis in a mouse model. Fertility and Sterility, 85(1), 71–77.

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