Exclusion of linkage between the serotonin2 receptor and schizophrenia in a large Swedish kindred.
Family, twin, and adoption studies suggest that genetic factors play an important role in the etiology of schizophrenia. Detection of single gene(s) involved in a higher susceptibility to a hereditary disease is possible with linkage analysis. The effects of serotonin2-receptor antagonists on symptoms of schizophrenia suggest that a mutation in the gene coding for this receptor subtype might be involved in the pathophysiology of this disease. Recently a copy DNA encoding the serotonin 5-HT2 receptor has been isolated and with a human 5-HT2 receptor copy DNA probe the HTR2 locus has been mapped to chromosome 13. Using multipoint linkage analysis between schizophrenia and genetic markers spanning the region of the HTR2 locus, we were able to exclude linkage between this candidate gene and schizophrenia in a Swedish kindred. Given this result, we conclude that the serotonin 5-HT2 receptor gene itself is not a major susceptibility gene for schizophrenia in this family.
Department of Genetics, Stanford University School of Medicine, CA 94605.
J
J
Hallmayer
J L
JL
Kennedy
L
L
Wetterberg
B
B
Sjögren
K K
KK
Kidd
L L
LL
Cavalli-Sforza
D002882:Chromosomes, Human, Pair 13; D015342:DNA Probes; D005260:Female; D008040:Genetic Linkage / Q000235:genetics*; D006801:Humans; D008126:Lod Score; D008297:Male; D008875:Middle Aged; D012150:Polymorphism, Restriction Fragment Length; D011985:Receptors, Serotonin / Q000235:genetics* / Q000502:physiology; D012559:Schizophrenia / Q000235:genetics* / Q000503:physiopathology; D013548:Sweden
D015342:DNA Probes; D011985:Receptors, Serotonin