Human heart mitochondria do not produce physiologically relevant quantities of nitric oxide

Attila Csordás, Eszter Pankotai, James A. Snipes, Attila Cselenyák, Zsolt Sárszegi, Attila Cziráki, Balázs Gaszner, Lajos Papp, Rita Benko, Levente Kiss, Endre Kovács, Márk Kollai, Csaba Szabo, David W. Busija, Zsombor Lacza

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Previous studies raised the possibility that nitric oxide synthase is present in heart mitochondria (mtNOS) and the existence of such an enzyme became generally accepted. However, original experimental evidence is rather scarce and positive identification of the enzyme is lacking. We aimed to detect an NOS protein in human and mouse heart mitochondria and to measure the level of NO released from the organelles. Western blotting with 7 different anti-NOS antibodies failed to detect a NOS-like protein in mitochondria. Immunoprecipitation or substrate-affinity purification of the samples concentrated NOS in control preparations but not in mitochondria. Release of NO from live respiring human mitochondria was below 2 ppb after 45 min of incubation. In a bioassay system, mitochondrial suspension failed to cause vasodilation of human mammary artery segments. These results indicate that mitochondria do not produce physiologically relevant quantities of NO in the heart and are unlikely to have any physiological importance as NO donors, nor do they contain a recognizable mtNOS enzyme.

Original languageEnglish (US)
Pages (from-to)633-637
Number of pages5
JournalLife Sciences
Volume80
Issue number7
DOIs
StatePublished - Jan 23 2007
Externally publishedYes

Fingerprint

Heart Mitochondria
Mitochondria
Nitric Oxide
Enzymes
Mammary Arteries
Immunoprecipitation
Vasodilation
Nitric Oxide Synthase
Biological Assay
Organelles
Anti-Idiotypic Antibodies
Suspensions
Proteins
Bioassay
Western Blotting
Purification
Antibodies
Substrates

Keywords

  • Circulation
  • Mitochondrion
  • Nitric oxide
  • Vasodilatation

ASJC Scopus subject areas

  • Pharmacology

Cite this

Csordás, A., Pankotai, E., Snipes, J. A., Cselenyák, A., Sárszegi, Z., Cziráki, A., ... Lacza, Z. (2007). Human heart mitochondria do not produce physiologically relevant quantities of nitric oxide. Life Sciences, 80(7), 633-637. https://doi.org/10.1016/j.lfs.2006.10.009

Human heart mitochondria do not produce physiologically relevant quantities of nitric oxide. / Csordás, Attila; Pankotai, Eszter; Snipes, James A.; Cselenyák, Attila; Sárszegi, Zsolt; Cziráki, Attila; Gaszner, Balázs; Papp, Lajos; Benko, Rita; Kiss, Levente; Kovács, Endre; Kollai, Márk; Szabo, Csaba; Busija, David W.; Lacza, Zsombor.

In: Life Sciences, Vol. 80, No. 7, 23.01.2007, p. 633-637.

Research output: Contribution to journalArticle

Csordás, A, Pankotai, E, Snipes, JA, Cselenyák, A, Sárszegi, Z, Cziráki, A, Gaszner, B, Papp, L, Benko, R, Kiss, L, Kovács, E, Kollai, M, Szabo, C, Busija, DW & Lacza, Z 2007, 'Human heart mitochondria do not produce physiologically relevant quantities of nitric oxide', Life Sciences, vol. 80, no. 7, pp. 633-637. https://doi.org/10.1016/j.lfs.2006.10.009
Csordás A, Pankotai E, Snipes JA, Cselenyák A, Sárszegi Z, Cziráki A et al. Human heart mitochondria do not produce physiologically relevant quantities of nitric oxide. Life Sciences. 2007 Jan 23;80(7):633-637. https://doi.org/10.1016/j.lfs.2006.10.009
Csordás, Attila ; Pankotai, Eszter ; Snipes, James A. ; Cselenyák, Attila ; Sárszegi, Zsolt ; Cziráki, Attila ; Gaszner, Balázs ; Papp, Lajos ; Benko, Rita ; Kiss, Levente ; Kovács, Endre ; Kollai, Márk ; Szabo, Csaba ; Busija, David W. ; Lacza, Zsombor. / Human heart mitochondria do not produce physiologically relevant quantities of nitric oxide. In: Life Sciences. 2007 ; Vol. 80, No. 7. pp. 633-637.
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