Case history and genome-wide scans for copy number variants in a family with patient having 15q11.1-q11.2 duplication and 22q11.2 deletion, and schizophrenia

American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics : the Official Publication of the International Society of Psychiatric Genetics
Sakae TakahashiMakoto Uchiyama

Abstract

Many studies have indicated that chromosomes 15q11 and 22q11 may be associated with the genetic etiologies of schizophrenia. We have followed an adult schizophrenia case with 15q11.1-q11.2 duplication and 22q11.2 deletion. Here we report his clinical history, and copy number variants (CNVs) identified by microarray and real-time PCR in the patient and his parents. This is the first report describing a detailed phenotype of an adult schizophrenic case with both 15q11 and 22q11 CNVs as revealed by novel and trustworthy technologies. Subjects were a 33-year-old male patient with 15q11 and 22q11 CNVs, and his normal parents. He fulfilled the DSM-IV criteria for schizophrenia at age 18 years. He was also diagnosed with 22q11.2 deletion syndrome by fluorescence in situ hybridization (FISH) at age 18 years. To search for CNVs in more detail, whole-genome array-CGH analyses including ∼ 420,000 probes were carried out in the patient and his parents. For validations of the CNVs detected by array-CGH, real-time PCR analyses of these CNVs were performed. The patient had two disease-specific CNVs, 15q11.1-q11.2 duplication (∼ 2.7 Mb) and 22q11.21 deletion (∼ 2.9 Mb). These two regions are important for the development of schizophrenia, and ...Continue Reading

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22q11 Deletion Syndrome

22q11.2 deletion syndrome, also known as DiGeorge syndrome, is a congenital disorder caused by a partial deletion of chromosome 22. Symptoms include heart defects, poor immune system function, a cleft palate, complications related to low levels of calcium in the blood, and delayed development. Discover the latest research on this disease here.

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