Preferential susceptibility of brain tumors to the antiangiogenic effects of an alpha(v) integrin antagonist.

Abstract:

OBJECTIVE:Brain tumors are highly angiogenic, and their growth and spread depend on the generation of new blood vessels. We examined the effect of the cyclic peptide antagonist pentapeptide EMD 121974, an antiangiogenic agent, on orthotopic and heterotopic brain tumor growth. METHODS:The human brain tumor cell lines DAOY (medulloblastoma) and U87 MG (glioblastoma) were injected into either the forebrain (orthotopic) or the subcutis (heterotopic) of nude mice, and daily systemic treatment with the active peptide was initiated after tumors were established. RESULTS:All control animals with orthotopic brain tumors and that received the inactive peptide EMD 135981 daily died as a result of tumor progression within 4 to 6 weeks; tumors measured 3 to 5 mm in diameter. In contrast, mice with orthotopic tumors that were treated daily with the active peptide survived for more than 16 weeks, and histological examination of the brains after 4, 8, and 12 weeks showed either no tumors or microscopic residual tumors. The growth of these brain tumor cells injected simultaneously or separately into the subcutis of nude mice (heterotopic model) was not affected by the active peptide, suggesting that the brain environment is a critical determinant of brain tumor susceptibility to growth inhibition by this pentapeptide. CONCLUSION:The cyclic pentapeptide EMD 121974 may become a treatment option specific to brain tumors. Because of its antiangiogenic effect, its use may be especially indicated after tumors are removed surgically.

journal_name

Neurosurgery

journal_title

Neurosurgery

authors

MacDonald TJ,Taga T,Shimada H,Tabrizi P,Zlokovic BV,Cheresh DA,Laug WE

doi

10.1097/00006123-200101000-00026

keywords:

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

151-7

issue

1

eissn

0148-396X

issn

1524-4040

journal_volume

48

pub_type

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