Evaluation of linkage of markers on chromosome 6p with schizophrenia in Taiwanese families

Previous studies have indicated possible linkage of schizophrenia with chromosome 6p21‐24. In an attempt to replicate these findings, we studied the linkage of schizophrenia with nine markers on chromosome 6p21‐24 in 39 Taiwanese schizophrenic nuclear families with at least two affected siblings. Tw...

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Bibliographic Details
Published in:American journal of medical genetics 2000-02, Vol.96 (1), p.74-78
Main Authors: Hwu, Hai-Gwo, Lin, Ming-Wei, Lee, Ping-Chuan, Lee, Sandy F-C, Ou-Yang, Wen-Chen, Liu, Chih-Min
Format: Article
Language:English
Subjects:
Adolescent
Adult
Adult and adolescent clinical studies
Biological and medical sciences
chromosome 6p
Chromosomes, Human, Pair 6
Female
Genetic Linkage
Genetic Markers
genotyping
Humans
linkage
Male
Medical sciences
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Psychoses
Schizophrenia
Schizophrenia - ethnology
Schizophrenia - genetics
Taiwan
Tropical medicine
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Summary:Previous studies have indicated possible linkage of schizophrenia with chromosome 6p21‐24. In an attempt to replicate these findings, we studied the linkage of schizophrenia with nine markers on chromosome 6p21‐24 in 39 Taiwanese schizophrenic nuclear families with at least two affected siblings. Two diagnostic models (narrow: Diagnostic and Statistical Manual of Mental Disorders‐IV schizophrenia only; and broad: including schizophrenia, schizoaffective, and other nonaffective psychotic disorders) were used to define the disease phenotypes. With the broad and narrow diagnostic models, the marker D6S296 produced maximum two‐point lod scores of 1.46 (θ = 0.2) and 1.35 (θ = 0.2), respectively, in the recessive inheritance model. Assuming locus heterogeneity, a multipoint lod score of 0.85 was obtained between markers D6S296 and D6S277 under the narrow/recessive model. Maximum nonparametric lod scores of 1.25 ( p= 0.09) and 1.36 (p = 0.08) were observed, but still not statistically significant, at D6S296 in the narrow and broad diagnostic models, respectively. Both two‐point analysis of the dominant model (lod score 0.85) and nonparametric analysis (lod score 1.25) showed a mild peak lod score appeared at marker D6S 285 as well. The results add some support to the suggestive linkage of schizophrenia with markers in the regions of chromosome 6p22 and 6p24 in an ethnically distinct Taiwanese sample. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 96:74–78, 2000. © 2000 Wiley‐Liss, Inc.
ISSN:0148-7299
1096-8628
DOI:10.1002/(SICI)1096-8628(20000207)96:1<74::AID-AJMG15>3.0.CO;2-G