Abstract
Endostatin, a proteolytic fragment of collagen XVIII, is a potent inhibitor of angiogenesis and the growth of several primary tumors. However, the opinions on the activity of endostatin derivatives deleted N- or C- terminal are still controversial. In this regard, we produced mouse endostatin and its derivatives in the prokaryotic system, and studied their anti-tumor activity. The [3H]-thymidine incorporation assay demonstrated that N-terminal deleted mouse endostatin, and a C- and N-terminal deleted mutant, effectively inhibited the proliferation of human umbilical vein endothelial cells (HUVECs). The biological activity of endostatin was also shown by its in vivo anti-angiogenic ability on the chorioallantoic membrane (CAM) of a chick embryo. Treatment of 200 ng of mouse endostatin, or N-terminal deleted mouse endostatin, inhibited capillary formation of CAM 45 to 71%, which is comparative to a 80% effect of positive control, 1 μg of retinoic acid. An in vivo mouse tumor growth assay showed that N-terminal deleted mouse endostatin, and the N-/C-terminal deleted mutant, significantly repressed the growth of B16F10 melanoma cells in mice as did the full-length mouse endostatin. According to these results, N- and N-/C-terminal deleted mouse endostatins are the potent inhibitors of tumor growth and angiogenesis.
Original language | English |
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Pages (from-to) | 206-211 |
Number of pages | 6 |
Journal | Journal of biochemistry and molecular biology |
Volume | 34 |
Issue number | 3 |
Publication status | Published - 2001 May 31 |
All Science Journal Classification (ASJC) codes
- Biochemistry
- Molecular Biology