OBJECTIVES: Abnormalities of brain white matter and oligodendroglia are replicated findings in schizophrenia research. The largely oligodendroglia-associated enzyme ADAM (A disintegrin and metalloprotease) 12 might be involved in the patho-physiology of schizophrenia, because the gene coding for human ADAM12 is located on chromosome 10q26.3, a gene locus which has been linked to schizophrenia, and some of its putative substrates are altered in schizophrenia. METHODS: We studied the numerical density of ADAM12 expressing oligodendrocytes in post-mortem prefrontal brains of patients with haloperidol treated, chronic schizophrenia and matched controls. RESULTS: A significantly reduced numerical density of ADAM12 immunoreactive oligodendrocytes was found in the white matter of the anterior cingulate cortex of schizophrenic patients. CONCLUSIONS: Although the pathophysiological implications of this finding are currently unknown, it is well conveyable that reduced ADAM12 protein contributes to a deviant metabolism of some of its substrates. These substrates are either parts of important signalling cascades (EGF, betacellulin, TGF-beta) or chemical components of myelin (neurofascin-ankyrin) known to be compromised in schizophrenia.
OBJECTIVES:Abnormalities of brain white matter and oligodendroglia are replicated findings in schizophrenia research. The largely oligodendroglia-associated enzyme ADAM (A disintegrin and metalloprotease) 12 might be involved in the patho-physiology of schizophrenia, because the gene coding for humanADAM12 is located on chromosome 10q26.3, a gene locus which has been linked to schizophrenia, and some of its putative substrates are altered in schizophrenia. METHODS: We studied the numerical density of ADAM12 expressing oligodendrocytes in post-mortem prefrontal brains of patients with haloperidol treated, chronic schizophrenia and matched controls. RESULTS: A significantly reduced numerical density of ADAM12 immunoreactive oligodendrocytes was found in the white matter of the anterior cingulate cortex of schizophrenicpatients. CONCLUSIONS: Although the pathophysiological implications of this finding are currently unknown, it is well conveyable that reduced ADAM12 protein contributes to a deviant metabolism of some of its substrates. These substrates are either parts of important signalling cascades (EGF, betacellulin, TGF-beta) or chemical components of myelin (neurofascin-ankyrin) known to be compromised in schizophrenia.
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