Tissue plasminogen activator release in vivo in response to vasoactive agents

D. Smith, M. Gilbert, W. G. Owen

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Release of tissue plasminogen activator into the circulation of rats in response to intravascular injections of vasoactive agents is studied by using a sensitive and specific clot lysis assay. Intra-arterial bradykinin elicits a rapid and transient rise in circulating plasminogen activator, which is maximum within one minute and is cleared within four to eight minutes. The plasminogen activator is fibrin dependent and is neutralized by an antiserum to human tissue-type plasminogen activator. Bradykinin is 1,000-fold more potent than the other agonists tested, which include histamine, norepinephrine, epinephrine, eledoisin-related peptide, arginine-vasopressin, lysine-vasopressin, desmopressin acetate, carbacol, and acetylcholine. Potency of bradykinin is related to its amino acid sequence. Sequential infusions of bradykinin produce a tachyphylactoid response that could be overcome by increasing the dose of the sequential bradykinin challenge. It is concluded that the characteristics of the responses to bradykinin and other agents in vivo differ significantly from those observed in isolated tissue preparations.

Original languageEnglish (US)
Pages (from-to)835-839
Number of pages5
JournalBlood
Volume66
Issue number4
StatePublished - Jan 1 1985

Fingerprint

Bradykinin
Tissue Plasminogen Activator
Plasminogen Activators
Lypressin
Deamino Arginine Vasopressin
Arginine Vasopressin
Fibrin
Histamine
Epinephrine
Acetylcholine
Rats
Immune Sera
Amino Acid Sequence
Assays
Norepinephrine
Tissue
Amino Acids
Injections

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

Cite this

Tissue plasminogen activator release in vivo in response to vasoactive agents. / Smith, D.; Gilbert, M.; Owen, W. G.

In: Blood, Vol. 66, No. 4, 01.01.1985, p. 835-839.

Research output: Contribution to journalArticle

Smith, D, Gilbert, M & Owen, WG 1985, 'Tissue plasminogen activator release in vivo in response to vasoactive agents', Blood, vol. 66, no. 4, pp. 835-839.
Smith, D. ; Gilbert, M. ; Owen, W. G. / Tissue plasminogen activator release in vivo in response to vasoactive agents. In: Blood. 1985 ; Vol. 66, No. 4. pp. 835-839.
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