Linkage analysis in two schizophrenic families originating from a restricted subpopulation of Finland.

Abstract:

:We report here linkage data on two families with multiple cases of schizophrenia originating from the genetically isolated population of Finland. We analyzed chromosomal DNA regions containing relevant candidate genes for schizophrenia and chromosomal regions which have been among the most widely studied in schizophrenia research due to associations between chromosomal anomalies and schizophrenia observed in certain families or populations. These include the chromosomal regions 5q11-q13, 11q and 15q21 as well as gene loci coding for components of dopamine, serotonin and amino acid transmitter pathways. No evidence for linkage to any of the chromosomal regions or candidate genes could be obtained, our data in fact suggested exclusion of all these regions as the site for major predisposing loci for schizophrenia in our families. On the 11p region the lod scores obtained deviated in the two families, but the difference remained statistically insignificant. The data emphasize the importance of analyzing families even with restricted genetic background separately since locus heterogeneity is likely to be detected not only between ethnic groups but also between diagnostic classes of the schizophrenia spectrum of diseases.

journal_name

Psychiatr Genet

journal_title

Psychiatric genetics

authors

Hovatta I,Seppälä J,Pekkarinen P,Tanskanen A,Lönnqvist J,Peltonen L

doi

10.1097/00041444-199400430-00004

subject

Has Abstract

pub_date

1994-10-01 00:00:00

pages

143-52

issue

3

eissn

0955-8829

issn

1473-5873

journal_volume

4

pub_type

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