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1996-02-27
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Document 0448
DOCN M9630448
TI A new approach for the pathogenesis of human African trypanosomiasis.
DT 9603
AU Kristensson K; Eneroth A; Olsson T; Wiesenfeld-Hallin Z; Department of
Neuroscience, Karolinska Institutet, Stockholm,; Sweden.
SO Bull Soc Pathol Exot. 1994;87(5):319-22. Unique Identifier : AIDSLINE
MED/96091677
AB From Trypanosoma brucei brucei, a molecule has been isolated which
triggers the production of IFN-gamma by CD8+ T-cells. IFN-gamma
modulates events in the hosts immune- and nervous system and provides a
growth stimulus for the parasites. Furthermore, a molecule with
IFN-gamma-like immunoreactivity has been detected in rat dorsal root
ganglion cells and certain neurons in the brain. This neuron-derived
IFN-gamma-like molecule differs in molecular weight from
lymphocyte-derived IFN-gamma but shares important biological activities
with the latter, which includes a growth stimulus for trypanosomes.
Trypanosomes localized to sensory ganglia and infected rats develop a
severe thermal hyperalgesia. Intrathecal injection of IFN-gamma causes
in rats a sustained phase of nociceptive flexor reflex facilitation,
which can be partially blocked by nitro-L-arginin-ester, an inhibitor of
nitric oxide synthase, indicating that nociceptive effects of the
IFN-gamma is mediated by activation of the L-arginin-nitric oxide
pathway.
DE Animal Arginine/ANALOGS & DERIVATIVES/PHARMACOLOGY Brain/METABOLISM
CD8-Positive T-Lymphocytes/METABOLISM Disease Models, Animal Enzyme
Inhibitors/PHARMACOLOGY Ganglia, Sensory/PARASITOLOGY Ganglia,
Spinal/METABOLISM/PARASITOLOGY Growth Substances/BIOSYNTHESIS Heat
Human Hyperalgesia/ETIOLOGY Injections, Spinal Interferon Type
II/ADMINISTRATION & DOSAGE/BIOSYNTHESIS/ PHARMACOLOGY Mice
Neurons/METABOLISM Nitric-Oxide Synthase/ANTAGONISTS & INHIB
Nociceptors/DRUG EFFECTS Rats Support, Non-U.S. Gov't Trypanosoma
brucei brucei/METABOLISM/PHYSIOLOGY Trypanosomiasis, African/*ETIOLOGY
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).