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A potential role of bradykinin in angiogenesis and growth of S-180 mouse tumors.

Abstract
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 hemoglobin contents (a parameter to evaluate angiogenesis) over a 20-day experimental period. Daily administration of bradykinin B2-receptor antagonists, Hoe140 (0.1 and 1 mg/kg per day, local injection) or FR173657 (30 mg/kg per day, p.o.), significantly suppressed the increment in angiogenesis and tumor weight, but a B1-receptor antagonist, desArg10-Hoe140 (1 mg/kgperday), did not. Administration of a plasma kallikrein inhibitor, soybean trypsin inhibitor (3 mg/site per day), significantly suppressed angiogenesis and tumor growth. In contrast, bradykinin-degrading enzyme inhibitors, captopril and phosphoramidon (500 microg/site per day), enhanced angiogenesis and increased tumor weight. Our results suggest that bradykinin, produced by plasma kallikrein or plasma kallikrein-like enzymes, promote tumor-associated angiogenesis and tumor growth in vivo.
AuthorsK Ishihara, I Hayash, S Yamashina, M Majima
JournalJapanese journal of pharmacology (Jpn J Pharmacol) Vol. 87 Issue 4 Pg. 318-26 (Dec 2001) ISSN: 0021-5198 [Print] Japan
PMID11829151 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Adrenergic beta-2 Receptor Antagonists
  • Adrenergic beta-Antagonists
  • Angiotensin-Converting Enzyme Inhibitors
  • Bradykinin Receptor Antagonists
  • Hemoglobins
  • Protease Inhibitors
  • icatibant
  • Kallikreins
  • Bradykinin
Topics
  • Adrenergic beta-2 Receptor Antagonists
  • Adrenergic beta-Antagonists (pharmacology)
  • Angiotensin-Converting Enzyme Inhibitors (pharmacology)
  • Animals
  • Bradykinin (analogs & derivatives, pharmacology, physiology)
  • Bradykinin Receptor Antagonists
  • Hemoglobins (metabolism)
  • Kallikreins (antagonists & inhibitors)
  • Mice
  • Mice, Inbred ICR
  • Neovascularization, Pathologic (pathology)
  • Protease Inhibitors (pharmacology)
  • Sarcoma 180 (pathology)

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