Decreased expression of NEFH and PCP4/PEP19 in the prefrontal cortex of alcoholics.
paper
Cited
Public
Unavailable
- Authors
- Iwamoto, Kazuya; Bundo, Miki; Yamamoto, Megumi; Ozawa, Hiroki; Saito, Toshikazu; Kato, Tadafumi
- Year
- 2004
- Journal
- Neuroscience research
- PMID
- 15236863
- DOI
- 10.1016/j.neures.2004.04.002
Patients with alcoholism exhibit behavioral adaptations to ethanol such as tolerance, dependence, and addiction. Molecular mechanisms that underlie these altered behavioral responses to ethanol are largely unclear. We have performed oligonucleotide microarray analysis in postmortem prefrontal cortices of alcoholics. Among about 12,000 genes represented on microarray, a total of 79 genes showed differential expression changes in alcoholics compared with control subjects, consisting of 54 up- and 25 down-regulated genes. Altered expressions in alcoholics were observed in genes having a wide range of biological functions. The remarkable findings were up-regulation of myelin-related genes and molecular chaperones in alcoholics. Among the genes identified, decreased expressions of NEFH and PCP4/PEP19 were further examined. NEFH encodes a component of neurofilament protein in neurons. PCP4/PEP19 encodes protein involved in calcium signaling and neuronal apoptosis. Observation of their down-regulations in alcoholics in microarray analysis was confirmed by real-time quantitative RT-PCR, and was also confirmed in the independent set of postmortem brains of alcoholics. The present results may provide some insights into understanding the mechanism of ethanol-induced altered behavioral responses at the molecular level.
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