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Zhe Wu Wang, MD; Donald Black, MD; Nancy C. Andreasen, MD, PhD; Raymond R. Crowe, MD

Arch Gen Psychiatry. 1993;50(3):212-216.

Abstract
• The long arm of chromosome 11 is of interest in schizophrenia research because of three independent reports of balanced 11q translocations cosegregating with schizophrenia and other major psychiatric illness in pedigrees. In addition, a number of candidate genes for psychosis are located in the translocated regions. These include the dopamine D₂ receptor, porphobilinogen deaminase, which has shown an allelic association with schizophrenia, and neural cell adhesion molecule, a cell surface glycoprotein involved in neuronal cell-cell recognition during brain development. To search for a schizophrenia locus on chromosome 11q, we conducted linkage analyses in 12 multiplex pedigrees. Sixteen DNA markers, including the above three candidate genes, were used to screen the entire long arm of chromosome 11. None of these markers were supportive of linkage to schizophrenia regardless of whether the affected phenotype was defined narrowly or broadly, whether high or low penetrance was assumed. Both dominant and recessive models tested more than 130 centimorgans of chromosome 11 q, and therefore, the reported translocated regions. The results provide no evidence for a susceptibility locus for schizophrenia on chromosome 11q in these pedigrees.

Author Affiliations
From the Department of Psychiatry, The University of Iowa College of Medicine, Iowa City.

Footnotes
Accepted for publication October 7, 1992.

Reprint requests to Department of Psychiatry, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, 2887 JPP, Iowa City, IA 52242 (Dr Crowe).

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