Pre-exposure to heat shock inhibits peroxynitrite-induced activation of poly(ADP) ribosyltransferase and protects against peroxynitrite cytotoxicity in J774 macrophages

Csaba Szabo, Hector R. Wong, Andrew L. Salzman

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The reaction of nitric oxide (NO) with superoxide yields the cytotoxic oxidant peroxynitrite, produced during inflammation and shock. A novel pathway of peroxynitrite cytotoxicity involves activation of the nuclear enzyme poly(ADP) ribosyltransferase, and concomitant ADP-ribosylation, NAD+ consumption and exhaustion of intracellular energy stores. In the present report we provide evidence that pre-exposure of J774 macrophages to heat shock reduces peroxynitrite-induced activation of poly(ADP) ribosyltransferase and protects against the peroxynitrite-induced suppression of mitochondrial respiration. The protection was significant at 8 h after heat shock, but was absent at 24 h after heat shock. Thus, the protection showed a temporal correlation with the expression of heat shock protein 70, the expression of which was maximal at 8 h. Exposure to heat shock did not alter the expression of poly(ADP) ribosyltransferase over 24 h. In summary, the heat shock phenotype or heat shock proteins may protect against peroxynitrite induced cytotoxicity.

Original languageEnglish (US)
Pages (from-to)221-226
Number of pages6
JournalEuropean Journal of Pharmacology
Volume315
Issue number2
DOIs
StatePublished - Nov 14 1996
Externally publishedYes

Fingerprint

ADP Ribose Transferases
Peroxynitrous Acid
Shock
Hot Temperature
Macrophages
HSP70 Heat-Shock Proteins
Enzyme Activation
Heat-Shock Proteins
Oxidants
Superoxides
NAD
Adenosine Diphosphate
Nitric Oxide
Respiration
Inflammation
Phenotype

Keywords

  • Endotoxin
  • Inflammation
  • Mitochondrial respiration
  • Nitric oxide (NO)
  • Shock
  • Superoxide

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience
  • Pharmacology

Cite this

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title = "Pre-exposure to heat shock inhibits peroxynitrite-induced activation of poly(ADP) ribosyltransferase and protects against peroxynitrite cytotoxicity in J774 macrophages",
abstract = "The reaction of nitric oxide (NO) with superoxide yields the cytotoxic oxidant peroxynitrite, produced during inflammation and shock. A novel pathway of peroxynitrite cytotoxicity involves activation of the nuclear enzyme poly(ADP) ribosyltransferase, and concomitant ADP-ribosylation, NAD+ consumption and exhaustion of intracellular energy stores. In the present report we provide evidence that pre-exposure of J774 macrophages to heat shock reduces peroxynitrite-induced activation of poly(ADP) ribosyltransferase and protects against the peroxynitrite-induced suppression of mitochondrial respiration. The protection was significant at 8 h after heat shock, but was absent at 24 h after heat shock. Thus, the protection showed a temporal correlation with the expression of heat shock protein 70, the expression of which was maximal at 8 h. Exposure to heat shock did not alter the expression of poly(ADP) ribosyltransferase over 24 h. In summary, the heat shock phenotype or heat shock proteins may protect against peroxynitrite induced cytotoxicity.",
keywords = "Endotoxin, Inflammation, Mitochondrial respiration, Nitric oxide (NO), Shock, Superoxide",
author = "Csaba Szabo and Wong, {Hector R.} and Salzman, {Andrew L.}",
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AU - Szabo, Csaba

AU - Wong, Hector R.

AU - Salzman, Andrew L.

PY - 1996/11/14

Y1 - 1996/11/14

N2 - The reaction of nitric oxide (NO) with superoxide yields the cytotoxic oxidant peroxynitrite, produced during inflammation and shock. A novel pathway of peroxynitrite cytotoxicity involves activation of the nuclear enzyme poly(ADP) ribosyltransferase, and concomitant ADP-ribosylation, NAD+ consumption and exhaustion of intracellular energy stores. In the present report we provide evidence that pre-exposure of J774 macrophages to heat shock reduces peroxynitrite-induced activation of poly(ADP) ribosyltransferase and protects against the peroxynitrite-induced suppression of mitochondrial respiration. The protection was significant at 8 h after heat shock, but was absent at 24 h after heat shock. Thus, the protection showed a temporal correlation with the expression of heat shock protein 70, the expression of which was maximal at 8 h. Exposure to heat shock did not alter the expression of poly(ADP) ribosyltransferase over 24 h. In summary, the heat shock phenotype or heat shock proteins may protect against peroxynitrite induced cytotoxicity.

AB - The reaction of nitric oxide (NO) with superoxide yields the cytotoxic oxidant peroxynitrite, produced during inflammation and shock. A novel pathway of peroxynitrite cytotoxicity involves activation of the nuclear enzyme poly(ADP) ribosyltransferase, and concomitant ADP-ribosylation, NAD+ consumption and exhaustion of intracellular energy stores. In the present report we provide evidence that pre-exposure of J774 macrophages to heat shock reduces peroxynitrite-induced activation of poly(ADP) ribosyltransferase and protects against the peroxynitrite-induced suppression of mitochondrial respiration. The protection was significant at 8 h after heat shock, but was absent at 24 h after heat shock. Thus, the protection showed a temporal correlation with the expression of heat shock protein 70, the expression of which was maximal at 8 h. Exposure to heat shock did not alter the expression of poly(ADP) ribosyltransferase over 24 h. In summary, the heat shock phenotype or heat shock proteins may protect against peroxynitrite induced cytotoxicity.

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KW - Inflammation

KW - Mitochondrial respiration

KW - Nitric oxide (NO)

KW - Shock

KW - Superoxide

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