TY  - JOUR
A1  - Biernacka, J. M.
A1  - Sangkuhl, K.
A1  - Jenkins, G.
A1  - Whaley, R. M.
A1  - Barman, P.
A1  - Batzler, A.
A1  - Altman, R. B.
A1  - Arolt, V.
A1  - Brockmöller, J.
A1  - Chen, C. H.
A1  - Domschke, K.
A1  - Hall-Flavin, D. K.
A1  - Hong, C. J.
A1  - Illi, A.
A1  - Ji, Y.
A1  - Kampman, O.
A1  - Kinoshita, T.
A1  - Leinonen, E.
A1  - Liou, Y. J.
A1  - Mushiroda, T.
A1  - Nonen, S.
A1  - Skime, M. K.
A1  - Wang, L.
A1  - Baune, B. T.
A1  - Kato, M.
A1  - Liu, Y. L.
A1  - Praphanphoj, V.
A1  - Stingl, J. C.
A1  - Tsai, S. J.
A1  - Kubo, M.
A1  - Klein, T. E.
A1  - Weinshilboum, R.
T1  - The International SSRI Pharmacogenomics Consortium (ISPC): a genome-wide association study of antidepressant treatment response
JF  - Translational Psychiatry
N2  - Response to treatment with selective serotonin reuptake inhibitors (SSRIs) varies considerably between patients. The International SSRI Pharmacogenomics Consortium (ISPC) was formed with the primary goal of identifying genetic variation that may contribute to response to SSRI treatment of major depressive disorder. A genome-wide association study of 4-week treatment outcomes, measured using the 17-item Hamilton Rating Scale for Depression (HRSD-17), was performed using data from 865 subjects from seven sites. The primary outcomes were percent change in HRSD-17 score and response, defined as at least 50% reduction in HRSD-17. Data from two prior studies, the Pharmacogenomics Research Network Antidepressant Medication Pharmacogenomics Study (PGRN-AMPS) and the Sequenced Treatment Alternatives to Relieve Depression (STAR*D) study, were used for replication, and a meta-analysis of the three studies was performed (N = 2394). Although many top association signals in the ISPC analysis map to interesting candidate genes, none were significant at the genome-wide level and the associations were not replicated using PGRN-AMPS and STAR*D data. Top association results in the meta-analysis of response included single-nucleotide polymorphisms (SNPs) in the HPRTP4 (hypoxanthine phosphoribosyltransferase pseudogene 4)/VSTM5 (V-set and transmembrane domain containing 5) region, which approached genome-wide significance (P = 5.03E - 08) and SNPs 5' upstream of the neuregulin-1 gene, NRG1 (P = 1.20E - 06). NRG1 is involved in many aspects of brain development, including neuronal maturation and variations in this gene have been shown to be associated with increased risk for mental disorders, particularly schizophrenia. Replication and functional studies of these findings are warranted.
KW  - major depressive disorder
KW  - genetic variation
KW  - schizophrenia
KW  - neuregulin-1
KW  - population
KW  - microcephalin 1
KW  - susceptibility
KW  - metaanalysis
KW  - MCPH1
KW  - loci
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-143223
VL  - 5
IS  - e553
ER  - 
TY  - JOUR
A1  - Gavvovidis, Ioannis
A1  - Rost, Isabell
A1  - Trimborn, Marc
A1  - Kaiser, Frank J.
A1  - Purps, Josephine
A1  - Wiek, Konstanze
A1  - Haneberg, Helmut
A1  - Neitzel, Heidemarie
A1  - Schindler, Detlev
T1  - A Novel MCPH1 Isoform Complements the Defective Chromosome Condensation of Human MCPH1-Deficient Cells
N2  - Biallelic mutations in MCPH1 cause primary microcephaly (MCPH) with the cellular phenotype of defective chromosome condensation. MCPH1 encodes a multifunctional protein that notably is involved in brain development, regulation of chromosome condensation, and DNA damage response. In the present studies, we detected that MCPH1 encodes several distinct transcripts, including two major forms: full-length MCPH1 (MCPH1-FL) and a second transcript lacking the six 39 exons (MCPH1De9–14). Both variants show comparable tissue-specific expression patterns, demonstrate nuclear localization that is mediated independently via separate NLS motifs, and are more abundant in certain fetal than adult organs. In addition, the expression of either isoform complements the chromosome condensation defect found in genetically MCPH1-deficient or MCPH1 siRNA-depleted cells, demonstrating a redundancy of both MCPH1 isoforms for the regulation of chromosome condensation. Strikingly however, both transcripts are regulated antagonistically during cell-cycle progression and there are functional differences between the isoforms with regard to the DNA damage response; MCPH1-FL localizes to phosphorylated H2AX repair foci following ionizing irradiation, while MCPH1De9–14 was evenly distributed in the nucleus. In summary, our results demonstrate here that MCPH1 encodes different isoforms that are differentially regulated at the transcript level and have different functions at the protein level.
KW  - MCPH1
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-75050
ER  -