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Peroxynitrite (ONOO(-)), which is generated from nitric oxide (NO) and superoxide anion (O(2)(.-)) under pathological conditions, plays an important role in pathophysiological processes. Activation of matrix metalloproteinases (MMPs) contributes to tumor angiogenesis and metastasis. NO mediates the
A direct rate assay for plasminogen activator has been developed using a synthetic fluorogenic peptide substrate, 7-(N-Cbz-glycylglycylargininamido)-4-methylcoumarin trifluoroacetate. The assay correlates well with the standard 125I-labeled fibrin plate assay using highly purified urokinase, culture
BALB/c mouse 3T3 cells transformed by simian virus 40 (SV3T3), baby hamster kidney cells transformed by polyoma virus or Rous sarcoma virus, and a range of neoplastic human cell lines release material that inhibits the migration of macrophages and lymphocytes. Similar migration-inhibitory factor
The effect of natural protease inhibitors and a chemoattractant on tumor cell invasion were studied with the use of a new in vitro quantitative assay of tumor cell penetration of native connective tissue. Human amnion membrane denuded of its epithelium is composed of a continuous basement membrane
It was previously reported that, in addition to a known chymotrypsin-like protease capable of hydrolyzing histones with an optimum pH of 8 (neutral protease), another protease is bound to the chromatin of various rat tissues and in situ hydrolyzes casein more quickly than histones with an optimum pH
Angiogenesis is an important event in tumor growth. We evaluated the contribution of endogenous bradykinin to tumor-associated angiogenesis and tumor growth using pharmacological approaches in mice bearing sarcoma 180 cells. The weight of implanted tumors increased in parallel with increased