Allylamine-induced vascular toxicity in vitro: Prevention by semicarbazide-sensitive amine oxidase inhibitors

Kenneth Ramos, Scott L. Grossman, Lydia R. Cox

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

The present studies were designed to evaluate the role that metabolic activation plays in allylamine (AAM)-induced vascular toxicity. The effects of AAM were evaluated in primary cultures of rat vascular endothelial (VEC) and smooth muscle cells (SMC). Semicarbazide (SC) and diethyldithiocarbamate (DDC) were used as inhibitors of semicarbazide-sensitive amine oxidase (SSAO). Clorgyline and pargyline were used as inhibitors of monoamine oxidase (MAO) A and B, respectively. The effect of catalase, a hydrogen peroxide scavenger, on AAM-induced cytotoxicity was also evaluated. Lactate dehydrogenase (LDH) release and morphological alterations were chosen as indicators of cytotoxicity. Confluent cultures of VEC and SMC were exposed to various concentrations of AAM (2-200 μm) in the absence and presence of serum for 4, 12, or 24 hr. High concentrations of AAM (200 μm) alone produced a time-dependent increase in LDH release and morphologic alterations in cultures of both cell types. Lower concentrations of AAM did not compromise the structural integrity of the cells. Semicarbazide (200 μm) or DDC (2 mm), but not clorgyline (10 μm) or pargyline (10 μm), prevented the toxicity of AAM (200 μm). Allylamine-induced cytotoxicity was partially prevented by catalase (2500 U/ml). The presence of fetal bovine serum in the medium was not essential for the manifestation of cytotoxicity. Single cell suspensions of VEC or SMC formed acrolein (ACR) when incubated in the presence of AAM. The formation of ACR mediated by SMC was inhibited by SC (20 μm), but not clorgyline (10 μm). These results support the concept that AAM is oxidatively deaminated by an SSAO present in vascular cells to generate toxic metabolic by-products capable of causing extensive cellular injury.

Original languageEnglish (US)
Pages (from-to)61-71
Number of pages11
JournalToxicology and Applied Pharmacology
Volume95
Issue number1
DOIs
StatePublished - 1988
Externally publishedYes

Fingerprint

Allylamine
Amine Oxidase (Copper-Containing)
Blood Vessels
Toxicity
Clorgyline
Cytotoxicity
Smooth Muscle Myocytes
Muscle
Pargyline
Acrolein
Ditiocarb
Monoamine Oxidase
L-Lactate Dehydrogenase
Catalase
In Vitro Techniques
Poisons
Structural integrity
Serum
Cell culture
Hydrogen Peroxide

ASJC Scopus subject areas

  • Pharmacology
  • Toxicology

Cite this

Allylamine-induced vascular toxicity in vitro : Prevention by semicarbazide-sensitive amine oxidase inhibitors. / Ramos, Kenneth; Grossman, Scott L.; Cox, Lydia R.

In: Toxicology and Applied Pharmacology, Vol. 95, No. 1, 1988, p. 61-71.

Research output: Contribution to journalArticle

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