Antiangiogenesis therapy using a novel angiogenesis inhibitor, anginex, following radiation causes tumor growth delay.

Abstract:

BACKGROUND:The present study investigated whether treatment with anginex, a novel antiangiogenic peptide, could block re-vascularization after radiation treatment. METHODS:A squamous cell (SCCVII) xenograft tumor mouse model was employed to assess the effects of anginex given post-radiation on tumor growth, microvessel density (MVD), and oxygen levels. The oxygen status was determined by the partial pressure of O2. RESULTS:Tumors in untreated mice increased threefold in 7.0 days, anginex-treated tumors (10 mg/kg intraperitoneal, twice) required 7.3 +/- 0.9 days, and tumors exposed to 8-Gy radiation increased threefold over 11 days. Combination treatment of anginex and radiation caused the tumors to grow threefold in 16.1 +/- 1.6 days, a delay which was significant and deemed supra-additive. Oxygen levels in tumors treated by stand-alone or combination therapies were significantly reduced; for example from 19.5 +/- 4.9 mmHg in controls to 9.7 +/- 1.9 mmHg in combination-treated, size-matched tumors. In addition, immunohistochemistry showed a decrease in MVD in the tumors treated with anginex, radiation, or the combination. These results suggest that a combination of anginex and radiation can greatly affect the amount of functional vasculature in tumors and prolong radiation-induced tumor regression. CONCLUSION:Antiangiogenesis therapy with anginex, in addition to radiotherapy, will be useful by blocking angiogenesis-dependent regrowth of vessels.

journal_name

Int J Clin Oncol

authors

Amano M,Suzuki M,Andoh S,Monzen H,Terai K,Williams B,Song CW,Mayo KH,Hasegawa T,Dings RP,Griffin RJ

doi

10.1007/s10147-006-0625-y

subject

Has Abstract

pub_date

2007-02-01 00:00:00

pages

42-7

issue

1

eissn

1341-9625

issn

1437-7772

journal_volume

12

pub_type

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