Abstract：
:Altered noradrenergic function is associated with alcoholism. Reduced brain norepinephrine (NE) concentrations and beta-adrenergic receptor supersensitivity following chronic alcohol consumption suggest a reduced level of noradrenergic neurotransmission. To further elucidate the reason for changes in noradrenergic function, we determined the number of melanin-containing noradrenergic neurons in the locus coeruleus (LC) postmortem from 11 controls and 7 alcoholics. Controls did not have a known history of psychiatric or neurologic disorders and were drug-free by toxicological screen. The diagnosis of alcohol-dependence was based on DSM-III-R criteria. Alcoholics differed from controls in having 23% fewer LC neurons (control: 43,472 +/- 1,021; alcoholic: 33,398 +/- 2184; P < 0.0005) and 46% lower density of neurons (control: 1,227 +/- 89 cells per mm3; alcoholic: 663 +/- 94 cells per mm3; P = 0.001). The reduction in neurons was bilateral and throughout the middle third of the LC. The two groups did not differ with respect to LC length (control: 16.1 +/- 0.6 mm; alcoholic 15.3 +/- 0.9 mm; P = 0.47) or total LC volume (control: 37.3 +/- 2.8 mm3; alcoholic: 46.5 +/- 4.2 mm3; P = 0.09). Changes in noradrenergic neurotransmission in alcoholics may be due to fewer noradrenergic neurons in the locus coeruleus and may contribute to memory loss and depression, common consequences of alcoholism.
journal_name
Brain Resjournal_title
Brain researchauthors
Arango V,Underwood MD,Mann JJdoi
10.1016/0006-8993(94)90199-6subject
Has Abstractpub_date
1994-07-04 00:00:00pages
1-8issue
1eissn
0006-8993issn
1872-6240pii
0006-8993(94)90199-6journal_volume
650pub_type
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