DESCRIPTION:

Study analyzed 812 differentially expressed gene candidates from peripheral blood mononuclear cells (PBMC) from morphine and saline treated rats, and suggests similarities between the gene expression profile in PBMCs and in the brain of morphine-treated rats. This set contains the 79 genes implicated by this study to modulate expression during chronic morphine treatment.

LABEL:

DiffExpr Morphine

SCORE TYPE:

Binary

DATE ADDED:

2009-01-20

DATE UPDATED:

2020-05-06

SPECIES:

AUTHORS:

Desjardins S, Belkai E, Crete D, Cordonnier L, Scherrmann JM, Noble F, Marie-Claire C

TITLE:

Effects of chronic morphine and morphine withdrawal on gene expression in rat peripheral blood mononuclear cells.

JOURNAL:

Neuropharmacology Dec 2008, Vol 55, pp. 1347-54

ABSTRACT:

Chronic morphine treatment alters gene expression in brain structures. There are increasing evidences showing a correlation, in gene expression modulation, between blood cells and brain in psychological troubles. To test whether gene expression regulation in blood cells could be found in drug addiction, we investigated gene expression profiles in peripheral blood mononuclear (PBMC) cells of saline and morphine-treated rats. In rats chronically treated with morphine, the behavioral signs of spontaneous withdrawal were observed and a withdrawal score was determined. This score enabled to select the time points at which the animals displayed the mildest and strongest withdrawal signs (12 h and 36 h after the last injection). Oligonucleotide arrays were used to assess differential gene expression in the PBMCs and quantitative real-time RT-PCR to validate the modulation of several candidate genes 12 h and 36 h after the last injection. Among the 812 differentially expressed candidates, several genes (Adcy5, Htr2a) and pathways (Map kinases, G-proteins, integrins) have already been described as modulated in the brain of morphine-treated rats. Sixteen out of the twenty-four tested candidates were validated at 12 h, some of them showed a sustained modulation at 36 h while for most of them the modulation evolved as the withdrawal score increased. This study suggests similarities between the gene expression profile in PBMCs and brain of morphine-treated rats. Thus, the searching of correlations between the severity of the withdrawal and the PBMCs gene expression pattern by transcriptional analysis of blood cells could be promising for the study of the mechanisms of addiction. PUBMED: 18801381
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