RGD Reference Report - Morphine induces the release of CCL5 from astrocytes: potential neuroprotective mechanism against the HIV protein gp120. - Rat Genome Database

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Morphine induces the release of CCL5 from astrocytes: potential neuroprotective mechanism against the HIV protein gp120.

Authors: Avdoshina, V  Biggio, F  Palchik, G  Campbell, LA  Mocchetti, I 
Citation: Avdoshina V, etal., Glia. 2010 Oct;58(13):1630-9.
RGD ID: 4889899
Pubmed: PMID:20578038   (View Abstract at PubMed)
PMCID: PMC2919594   (View Article at PubMed Central)
DOI: DOI:10.1002/glia.21035   (Journal Full-text)

A number of human immunodeficiency virus type-1 (HIV) positive subjects are also opiate abusers. These individuals are at high risk to develop neurological complications. However, little is still known about the molecular mechanism(s) linking opiates and HIV neurotoxicity. To learn more, we exposed rat neuronal/glial cultures prepared from different brain areas to opiate agonists and HIV envelope glycoproteins gp120IIIB or BaL. These strains bind to CXCR4 and CCR5 chemokine receptors, respectively, and promote neuronal death. Morphine did not synergize the toxic effect of gp120IIIB but inhibited the cytotoxic property of gp120BaL. This effect was blocked by naloxone and reproduced by the mu opioid receptor agonist DAMGO. To examine the potential mechanism(s) of neuroprotection, we determined the effect of morphine on the release of chemokines CCL5 and CXCL12 in neurons, astrocytes, and microglia cultures. CCL5 has been shown to prevent gp120BaL neurotoxicity while CXCL12 decreases neuronal survival. Morphine elicited a time-dependent release of CCL5 but failed to affect the release of CXCL12. This effect was observed only in primary cultures of astrocytes. To examine the role of endogenous CCL5 in the neuroprotective activity of morphine, mixed cerebellar neurons/glial cells were immunoneutralized against CCL5 prior to morphine and gp120 treatment. In these cells the neuroprotective effect of opiate agonists was blocked. Our data suggest that morphine may exhibit a neuroprotective activity against M-tropic gp120 through the release of CCL5 from astrocytes.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
cellular response to lipopolysaccharide  IEP 4889899 RGD 
cellular response to morphine  IEP 4889899 RGD 
negative regulation of cellular process  IMP 4889899Cerebellar granule cellRGD 

Objects Annotated

Genes (Rattus norvegicus)
Ccl5  (C-C motif chemokine ligand 5)


Additional Information