Reactive nitrogen intermediates in human neuropathology

An overview

Celia F. Brosnan, Luca Battistini, Cedric S. Raine, Dennis W. Dickson, Arturo Casadevall, Sunhee C. Lee

Research output: Contribution to journalArticle

197 Citations (Scopus)

Abstract

Nitric oxide (NO) is a recently recognized messenger molecule that has been shown to possess pleiotropic properties, including vasodilation, neurotransmission, cytotoxicity and antimicrobial activity. Constitutive and inducible forms of NO synthase (NOS) have been identified. Activation of cNOS releases relatively low levels of NO for short periods of time whereas induction of iNOS releases high levels of NO for extended periods of time. In rodents, iNOS is predominantly found in cells of the monocyte/macrophage series, including microglia, where it is induced by a combination of bacterial products and cytokines. cNOS and iNOS have also been reported in rodent astrocytes. Activation of iNOS in the CNS could be toxic to many different cell types, including neurons and oligodendrocytes. iNOS, however, has been difficult to demonstrate in human peripheral blood cells, suggesting that the regulation of expression of this enzyme in humans is different from that found in rodents. In this overview, we show that in human glial cells cultured in vitro, astrocytes, but not microglia, can be induced by cytokines to express NO-like activity. Bacterial products are without effect, but a combination of IL-1 and TNFα or IFNγ is a potent stimulus. NO production by astrocytes inhibits Cryptococcus neoformans growth in vitro. In vivo, we show in acute multiple sclerosis lesions, intense NADPH-diaphorase activity is present in hypertrophic astrocytes in the lesion center and at the lesion edge, whereas microglia are nonreactive. Increased NADPH-diaphorase activity colocalizes with immunoreactivity for IL-1 and TNF. These results suggests that the induction of reactive nitrogen intermediates in humans differs from that found in rodents, and supports the conclusion that hypertrophic astrocytes are the major source of NO-like activity in the inflamed CNS.

Original languageEnglish (US)
Pages (from-to)152-161
Number of pages10
JournalDevelopmental Neuroscience
Volume16
Issue number3-4
DOIs
StatePublished - 1994

Fingerprint

Nitric Oxide
Astrocytes
Nitrogen
Rodentia
Microglia
NADPH Dehydrogenase
Interleukin-1
Cytokines
Cryptococcus neoformans
Poisons
Oligodendroglia
Nitric Oxide Synthase Type II
Vasodilation
Synaptic Transmission
Neuroglia
Multiple Sclerosis
Neuropathology
Monocytes
Blood Cells
Macrophages

Keywords

  • Astrocytes
  • C. neoformans
  • Cytokines
  • Inflammation
  • Microglia
  • Multiple sclerosis
  • Nitric oxide

ASJC Scopus subject areas

  • Developmental Neuroscience
  • Neurology
  • Neuroscience(all)

Cite this

Brosnan, C. F., Battistini, L., Raine, C. S., Dickson, D. W., Casadevall, A., & Lee, S. C. (1994). Reactive nitrogen intermediates in human neuropathology: An overview. Developmental Neuroscience, 16(3-4), 152-161. https://doi.org/10.1159/000112102

Reactive nitrogen intermediates in human neuropathology : An overview. / Brosnan, Celia F.; Battistini, Luca; Raine, Cedric S.; Dickson, Dennis W.; Casadevall, Arturo; Lee, Sunhee C.

In: Developmental Neuroscience, Vol. 16, No. 3-4, 1994, p. 152-161.

Research output: Contribution to journalArticle

Brosnan, CF, Battistini, L, Raine, CS, Dickson, DW, Casadevall, A & Lee, SC 1994, 'Reactive nitrogen intermediates in human neuropathology: An overview', Developmental Neuroscience, vol. 16, no. 3-4, pp. 152-161. https://doi.org/10.1159/000112102
Brosnan CF, Battistini L, Raine CS, Dickson DW, Casadevall A, Lee SC. Reactive nitrogen intermediates in human neuropathology: An overview. Developmental Neuroscience. 1994;16(3-4):152-161. https://doi.org/10.1159/000112102
Brosnan, Celia F. ; Battistini, Luca ; Raine, Cedric S. ; Dickson, Dennis W. ; Casadevall, Arturo ; Lee, Sunhee C. / Reactive nitrogen intermediates in human neuropathology : An overview. In: Developmental Neuroscience. 1994 ; Vol. 16, No. 3-4. pp. 152-161.
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