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We investigated the retroviral/retroposon hypothesis of schizophrenia by generating sequences with PCR primers based on a retroviral sequence recovered by Yee et al. [1998: Schizophr Res 29:92] from a cDNA library from postmortem brain tissue from an individual with psychosis in a genomic region (Xq21.3) that has been tentatively linked to schizophrenia and schizoaffective disorder by Laval et al. [1998: Am. J. Med. Genet. (Neuropsychiatr. Genet.) 81:420–427]. Within the block of homology with Yp that was generated by a transposition between the chimpanzee and Homo sapiens we find two sequences, HS307 and HS408, with a high degree of homology to but not identity with the schizophrenic brain cDNA. The closest match of these three sequences is to a family of retroposons, that has evolved from the HERV‐K family of endogenous retroviruses, some members of which (e.g., SINE‐R.C2) appear to be specific to the human genome. This element has been reported as a cause of Fukuyama‐type muscular dystrophy [Kobayashi et al., 1998: Nature 394:388–392]. Such retroposons, as agents of change in the human genome, provide a strategy for investigating pathogenesis. On account of their genomic location in a region that has been subject to change in the course of hominid evolution, and that may have a relationship to psychosis and/or cerebral asymmetry, we conclude that these particular insertions deserve further investigation. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:560–566, 1999. © 1999 Wiley‐Liss, Inc.
American Journal of Medical Genetics Part A – Wiley
Published: Mar 15, 2000
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