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1. One test for all: whole exome sequencing significantly improves the diagnostic yield in growth retarded patients referred for molecular testing for Silver–Russell syndrome

Author

Robert Meyer, Matthias Begemann, Christian Thomas Hübner, Daniela Dey, Alma Kuechler, Magdeldin Elgizouli, Ulrike Schara, Laima Ambrozaityte, Birute Burnyte, Carmen Schröder, Asmaa Kenawy, Peter Kroisel, Stephanie Demuth, Gyorgy Fekete, Thomas Opladen, Miriam Elbracht, and Thomas Eggermann

Subjects
Silver–Russell syndrome, Next generation sequencing, Diagnostic detection rate, Whole exome sequencing, Targeted multigene panel NGS, Medicine
Abstract

Abstract Background Silver-Russell syndrome (SRS) is an imprinting disorder which is characterised by severe primordial growth retardation, relative macrocephaly and a typical facial gestalt. The clinical heterogeneity of SRS is reflected by a broad spectrum of molecular changes with hypomethylation in 11p15 and maternal uniparental disomy of chromosome 7 (upd(7)mat) as the most frequent findings. Monogenetic causes are rare, but a clinical overlap with numerous other disorders has been reported. However, a comprehensive overview on the contribution of mutations in differential diagnostic genes to phenotypes reminiscent to SRS is missing due to the lack of appropriate tests. With the implementation of next generation sequencing (NGS) tools this limitation can now be circumvented. Main body We analysed 75 patients referred for molecular testing for SRS by a NGS-based multigene panel, whole exome sequencing (WES), and trio-based WES. In 21/75 patients a disease-causing variant could be identified among them variants in known SRS genes (IGF2, PLAG1, HMGA2). Several patients carried variants in genes which have not yet been considered as differential diagnoses of SRS. Conclusions WES approaches significantly increase the diagnostic yield in patients referred for SRS testing. Several of the identified monogenetic disorders have a major impact on clinical management and genetic counseling.

Published
2021
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2. One test for all: whole exome sequencing significantly improves the diagnostic yield in growth retarded patients referred for molecular testing for Silver–Russell syndrome

Author

Meyer, Robert, Begemann, Matthias, Hübner, Christian Thomas, Dey, Daniela, Kuechler, Alma, Elgizouli, Magdeldin, Schara, Ulrike, Ambrozaityte, Laima, Burnyte, Birute, Schröder, Carmen, Kenawy, Asmaa, Kroisel, Peter, Demuth, Stephanie, Fekete, Gyorgy, Opladen, Thomas, Elbracht, Miriam, and Eggermann, Thomas

Published
2021
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3. High mutation detection rates in cerebral cavernous malformation upon stringent inclusion criteria: one‐third of probands are minors

Author

Spiegler, Stefanie, Najm, Juliane, Liu, Jian, Gkalympoudis, Stephanie, Schröder, Winnie, Borck, Guntram, Brockmann, Knut, Elbracht, Miriam, Fauth, Christine, Ferbert, Andreas, Freudenberg, Leonie, Grasshoff, Ute, Hellenbroich, Yorck, Henn, Wolfram, Hoffjan, Sabine, Hüning, Irina, Korenke, G Christoph, Kroisel, Peter M, Kunstmann, Erdmute, Mair, Martina, Munk-Schulenburg, Susanne, Nikoubashman, Omid, Pauli, Silke, Rudnik-Schöneborn, Sabine, Sudholt, Irene, Sure, Ulrich, Tinschert, Sigrid, Wiednig, Michaela, Zoll, Barbara, Ginsberg, Mark H, and Felbor, Ute

Subjects
Stroke, Genetic Testing, Neurosciences, Rare Diseases, Brain Disorders, Clinical Research, Genetics, 2.1 Biological and endogenous factors, Aetiology, Age at disease onset, CCM1, CCM2, CCM3, cerebral cavernous malformation, HEG1, mutation detection rate, predictive testing, Medicinal and Biomolecular Chemistry, Clinical Sciences
Abstract

Cerebral cavernous malformations (CCM) are prevalent vascular malformations occurring in familial autosomal dominantly inherited or isolated forms. Once CCM are diagnosed by magnetic resonance imaging, the indication for genetic testing requires either a positive family history of cavernous lesions or clinical symptoms such as chronic headaches, epilepsy, neurological deficits, and hemorrhagic stroke or the occurrence of multiple lesions in an isolated case. Following these inclusion criteria, the mutation detection rates in a consecutive series of 105 probands were 87% for familial and 57% for isolated cases. Thirty-one novel mutations were identified with a slight shift towards proportionally more CCM3 mutations carriers than previously published (CCM1: 60%, CCM2: 18%, CCM3: 22%). In-frame deletions and exonic missense variants requiring functional analyses to establish their pathogenicity were rare: An in-frame deletion within the C-terminal FERM domain of CCM1 resulted in decreased protein expression and impaired binding to the transmembrane protein heart of glass (HEG1). Notably, 20% of index cases carrying a CCM mutation were below age 10 and 33% below age 18 when referred for genetic testing. Since fulminant disease courses during the first years of life were observed in CCM1 and CCM3 mutation carriers, predictive testing of minor siblings became an issue.

Published
2014

4. Further delineation of auriculocondylar syndrome based on 14 novel cases and reassessment of 25 published cases

Author

Vegas, N, Demir, Z, Gordon, CT, Breton, S, Tavares, VLR, Moisset, H, Zechi-Ceide, R, Kokitsu-Nakata, NM, Kido, Y, Marlin, S, Halem, SG, Meerschaut, I, Callewaert, B, Chung, B, Revencu, N, Lehalle, D, Petit, F, Propst, EJ, Papsin, BC, Phillips, JH, Jakobsen, L, Le Tanno, P, Thevenon, J, McGaughran, J, Gerkes, EH, Leoni, C, Kroisel, P, Tan, TY, Henderson, A, Terhal, P, Basel-Salmon, L, Alkindy, A, White, SM, Passos-Bueno, MR, Pingault, V, De Pontual, L, Amiel, J, Vegas, N, Demir, Z, Gordon, CT, Breton, S, Tavares, VLR, Moisset, H, Zechi-Ceide, R, Kokitsu-Nakata, NM, Kido, Y, Marlin, S, Halem, SG, Meerschaut, I, Callewaert, B, Chung, B, Revencu, N, Lehalle, D, Petit, F, Propst, EJ, Papsin, BC, Phillips, JH, Jakobsen, L, Le Tanno, P, Thevenon, J, McGaughran, J, Gerkes, EH, Leoni, C, Kroisel, P, Tan, TY, Henderson, A, Terhal, P, Basel-Salmon, L, Alkindy, A, White, SM, Passos-Bueno, MR, Pingault, V, De Pontual, L, and Amiel, J

Abstract

Auriculocondylar syndrome (ACS) is a rare craniofacial disorder characterized by mandibular hypoplasia and an auricular defect at the junction between the lobe and helix, known as a "Question Mark Ear" (QME). Several additional features, originating from the first and second branchial arches and other tissues, have also been reported. ACS is genetically heterogeneous with autosomal dominant and recessive modes of inheritance. The mutations identified to date are presumed to dysregulate the endothelin 1 signaling pathway. Here we describe 14 novel cases and reassess 25 published cases of ACS through a questionnaire for systematic data collection. All patients harbor mutation(s) in PLCB4, GNAI3, or EDN1. This series of patients contributes to the characterization of additional features occasionally associated with ACS such as respiratory, costal, neurodevelopmental, and genital anomalies, and provides management and monitoring recommendations.

Published
2022

5. New mutations in the ATM gene and clinical data of 25 AT patients

Author

Demuth, Ilja, Dutrannoy, Véronique, Marques, Jr, Wilson, Neitzel, Heidemarie, Schindler, Detlev, Dimova, Petja S., Chrzanowska, Krystyna H., Bojinova, Veneta, Gregorek, Hanna, Graul-Neumann, Luitgard M., von Moers, Arpad, Schulze, Ilka, Nicke, Marion, Bora, Elcin, Cankaya, Tufan, Oláh, Éva, Kiss, Csongor, Bessenyei, Beáta, Szakszon, Katalin, Gruber-Sedlmayr, Ursula, Kroisel, Peter Michael, Sodia, Sigrun, Goecke, Timm O., Dörk, Thilo, Digweed, Martin, Sperling, Karl, de Sá, Joaquim, Lourenco, Charles Marques, and Varon, Raymonda

Published
2011
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17. Morbidity risk of chromosomal breakpoints in topological domains enriched in non-exonic conserved elements

Author

Bak, M., Fonseca, A., Mehrjouy, M., Rasmussen, M., Halgren, C., Bache, I., Kroisel, P., Midyan, S., Vermeesch, J., Vienna-Morgante, A., Abe, K., Moretti-Ferreira, D., Angelova, L., Rajcan-Separovic, E., Sismani, C., Aristidou, C., Sedlacek, Z., Fagerberg, C., Brondum-Nielsen, K., Vogel, I., Bojesen, A., Ounap, K., Roht, L., Lespinasse, J., Beneteau, C., Kalscheuer, V., Ehmke, N., Daumer-Haas, C., Stefanou, E., Czako, M., Sheth, F., Bonaglia, C., Novelli, A., Fannemel, M., Engelen, J., Travessa, A., Kokalj-Vokac, N., Ramos-Arroyo, M., Martinez, L. R., Guitart, M., Schinzel, A., Silan, F., de Almeida, C., Akkari, Y., Batanian, J., Kim, H., Jacky, P., Tommerup, N., and Consortium, Int Breakpoint Mapping

Published
2019

22. Defining the Effect of the 16p11.2 Duplication on Cognition, Behavior, and Medical Comorbidities

Author

D'Angelo, D., Lebon, S., Chen, Q., Martin-Brevet, S., Snyder, L. G., Hippolyte, L., Hanson, E., Maillard, A. M., Faucett, W. A., Mace, A., Pain, A., Bernier, R., Chawner, S. J. R. A., David, A., Andrieux, J., Aylward, E., Baujat, G., Caldeira, I., Conus, P., Ferrari, C., Forzano, F., Gerard, M., Goin-Kochel, R. P., Grant, E., Hunter, J. V., Isidor, B., Jacquette, A., Jonch, A. E., Keren, B., Lacombe, D., Le Caignec, C., Martin, C. L., Mannik, K., Metspalu, A., Mignot, C., Mukherjee, P., Owen, M. J., Passeggeri, M., Rooryck-Thambo, C., Rosenfeld, J. A., Spence, S. J., Steinman, K. J., Tjernagel, J., Van Haelst, M., Shen, Y., Draganski, B., Sherr, E. H., Ledbetter, D. H., van den Bree, M. B. M., Beckmann, J. S., Spiro, J. E., Reymond, A., Jacquemont, S., Chung, W. K., Knoers, N. V. A. M., Martinet, D., Belfiore, M., Cuvellier, J. -C., Devries, B., Delrue, M. -A., Doco-Fenzy, M., Lebel, R., Leheup, B., Lewis, S., Mencarelli, M. A., Minet, J. -C., Vincent-Delorme, C., Moerman, A., Mucciolo, M., Ounap, K., Rajcan-Separovic, E., Renieri, A., Sanlaville, D., Faas, B. H., Koolen, D. A., Vulto-Van Silfhout, A., de Leeuw, N., Rosanfeld, J. A., Filges, I., Achatz, E., Roetzer, K. M., Bonneau, D., Guichet, A., Lazaro, L., Plessis, G., Kroisel, P. M., Reis, A., Jonveaux, P., Chantot-Bastaraud, S., Rauch, A., Demeer, B., Nordgren, A., Labalme, A., Ferrarini, A., Ramelli, G. P., Guilmatre, A., Joly-Helas, G., Haize, S., Layet, V., Le Gallic, S., de Freminville, B., Touraine, R., Van Binsbergen, E., Mathieu-Dramard, M., Barth, M., Blaumeiser, B., Masurel, A., Cailler, P., Olivier-Faivre, L., Malacarne, M., Coutton, C., Dieterich, K., Satre, V., Wallgren-Pettersson, C., Tensgrom, C., Kaksonen, S., Duban-Bedu, B., Holder, M., Rossi, M., Gaillard, D., Bock, D., Bednarek, N., Guillin, O., Bizzarri, V., Flori, E., Silengo, M., Kooy, R. F., Aboura, A., Beri, M., Delobel, B., Drunat, S., Jaros, Z., Kolk, A., Reigo, A., Zufferey, F., Beckmann, N., Faravelli, F., Alupay, H., Aaronson, B., Ackerman, S., Ankenman, K., Anwar, A., Atwell, C., Bowe, A., Beaudet, A. L., Benedetti, M., Berg, J., Berman, J., Berry, L. N., Bibb, A. L., Blaskey, L., Brennan, J., Brewton, C. M., Buckner, R., Bukshpun, P., Burko, J., Cali, P., Cerban, B., Chang, Y., Cheong, M., Chow, V., Chu, Z., Chudnovskaya, D., Cornew, L., Dale, C., Dell, J., Dempsey, A. G., Deschamps, T., Earl, R., Edgar, J., Elgin, J., Endre, J., Evans, Y. L., Findlay, A., Fischbach, G. D., Fisk, C., Fregeau, B., Gaetz, B., Gaetz, L., Garza, S., Gerdts, J., Glenn, O., Gobuty, S. E., Golembski, R., Greenup, M., Heiken, K., Hines, K., Hinkley, L., Jackson, F. I., Jenkins, J., Jeremy, R. J., Johnson, K., Kanne, S. M., Kessler, S., Khan, S. Y., Ku, M., Kuschner, E., Laakman, A. L., Lam, P., Lasala, M. W., Lee, H., La, K., Levy, S., Lian, A., Llorens, A. V., Loftus, K., Luks, T. L., Marco, E. J., Martin, S., Martin, A. J., Marzano, G., Masson, C., Mcgovern, K. E., Keehn, R. M., Miller, D. T., Miller, F. K., Moss, T. J., Murray, R., Nagarajan, S. S., Nowell, K. P., Owen, J., Paal, A. M., Packer, A., Page, P. Z., Paul, B. M., Peters, A., Peterson, D., Poduri, A., Pojman, N. J., Porche, K., Proud, M. B., Qasmieh, S., Ramocki, M. B., Reilly, B., Roberts, T. P. L., Shaw, D., Sinha, T., Smith, B., Snow, A., Swarnakar, V., Thieu, T., Triantafallou, C., Vaughan, R., Wakahiro, M., Wallace, A., Ward, T., Wenegrat, J., Wolken, A., Blaumeiser, Bettina, Kooy, Frank, Other departments, Cardiff University Experiences of Children With Copy Number Variants (ECHO) Study, 16p11.2 European Consortium, Simons Variation in Individuals Project (VIP) Consortium, Knoers, VA., Martinet, D., Belfiore, M., Cuvellier, JC., de Vries, B., Delrue, MA., Doco-Fenzy, M., Lebel, R., Leheup, B., Lewis, S., Mencarelli, MA., Minet, JC., Vincent-Delorme, C., Moerman, A., Mucciolo, M., Ounap, K., Rajcan-Separovic, E., Renieri, A., Sanlaville, D., Faas, BH., Koolen, DA., Vulto-van Silfhout, A., de Leeuw, N., Rosenfeld, JA., Filges, I., Achatz, E., Roetzer, KM., Bonneau, D., Guichet, A., Lazaro, L., Plessis, G., Kroisel, PM., Reis, A., Jonveaux, P., Chantot-Bastaraud, S., Rauch, A., Demeer, B., Nordgren, A., Labalme, A., Ferrarini, A., Ramelli, GP., Guilmatre, A., Joly-Helas, G., Haize, S., Layet, V., Le Gallic, S., de Fréminville, B., Touraine, R., Van Binsbergen, E., Mathieu-Dramard, M., Barth, M., Blaumeiser, B., Masurel, A., Cailler, P., Olivier-Faivre, L., Malacarne, M., Coutton, C., Dieterich, K., Satre, V., Wallgren-Pettersson, C., Tensgrom, C., Kaksonen, S., Duban-Bedu, B., Holder, M., Rossi, M., Gaillard, D., Bock, D., Bednarek, N., Guillin, O., Bizzarri, V., Flori, E., Silengo, M., Kooy, RF., Aboura, A., Beri, M., Delobel, B., Drunat, S., Jaros, Z., Kolk, A., Reigo, A., Zufferey, F., Beckmann, N., Faravelli, F., Alupay, H., Aaronson, B., Ackerman, S., Ankenman, K., Anwar, A., Atwell, C., Bowe, A., Beaudet, AL., Benedetti, M., Berg, J., Berman, J., Berry, LN., Bibb, AL., Blaskey, L., Brennan, J., Brewton, CM., Buckner, R., Bukshpun, P., Burko, J., Cali, P., Cerban, B., Chang, Y., Cheong, M., Chow, V., Chu, Z., Chudnovskaya, D., Cornew, L., Dale, C., Dell, J., Dempsey, AG., Deschamps, T., Earl, R., Edgar, J., Elgin, J., Olson, JE., Evans, YL., Findlay, A., Fischbach, GD., Fisk, C., Fregeau, B., Gaetz, B., Gaetz, L., Garza, S., Gerdts, J., Glenn, O., Gobuty, SE., Golembski, R., Greenup, M., Heiken, K., Hines, K., Hinkley, L., Jackson, FI., Jenkins J.<Suffix>3rd</Suffix>, Jeremy, RJ., Johnson, K., Kanne, SM., Kessler, S., Khan, SY., Ku, M., Kuschner, E., Laakman, AL., Lam, P., Lasala, MW., Lee, H., LaGuerre, K., Levy, S., Lian Cavanagh, A., Llorens, AV., Loftus Campe, K., Luks, TL., Marco, EJ., Martin, S., Martin, AJ., Marzano, G., Masson, C., McGovern, KE., McNally Keehn, R., Miller, DT., Miller, FK., Moss, TJ., Murray, R., Nagarajan, SS., Nowell, KP., Owen, J., Paal, AM., Packer, A., Page, PZ., Paul, BM., Peters, A., Peterson, D., Poduri, A., Pojman, NJ., Porche, K., Proud, MB., Qasmieh, S., Ramocki, MB., Reilly, B., Roberts, TP., Shaw, D., Sinha, T., Smith-Packard, B., Snow Gallagher, A., Swarnakar, V., Thieu, T., Triantafallou, C., Vaughan, R., Wakahiro, M., Wallace, A., Ward, T., Wenegrat, J., Wolken, A., Human genetics, Amsterdam Neuroscience - Complex Trait Genetics, and Amsterdam Reproduction & Development (AR&D)

Subjects
Male, 0301 basic medicine, Proband, Pediatrics, Autism Spectrum Disorder, Developmental Disabilities, Chromosome Disorders, Comorbidity, Nonverbal learning disorder, Cohort Studies, Cognition, 0302 clinical medicine, Cerebellum, Chromosome Duplication, Gene duplication, Copy-number variation, Non-U.S. Gov't, Child, 2. Zero hunger, Intelligence quotient, Research Support, Non-U.S. Gov't, Middle Aged, Psychiatry and Mental health, Microcephaly, Female, Schizophrenic Psychology, Chromosome Deletion, Psychology, Rare cancers Radboud Institute for Health Sciences [Radboudumc 9], Human, Adult, medicine.medical_specialty, Adolescent, DNA Copy Number Variations, Research Support, Nervous System Malformations, Article, Chromosomes, Young Adult, 03 medical and health sciences, Intellectual Disability, Journal Article, medicine, Humans, Autistic Disorder, Preschool, Psychiatry, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Epilepsy, Pair 16, Other Research Radboud Institute for Health Sciences [Radboudumc 0], Case-control study, Autism Spectrum Disorder/epidemiology, Autism Spectrum Disorder/genetics, Autistic Disorder/epidemiology, Autistic Disorder/genetics, Case-Control Studies, Cerebellum/abnormalities, Child, Preschool, Chromosome Disorders/epidemiology, Chromosome Disorders/genetics, Chromosomes, Human, Pair 16/genetics, Developmental Disabilities/epidemiology, Developmental Disabilities/genetics, Epilepsy/epidemiology, Epilepsy/genetics, Intellectual Disability/epidemiology, Intellectual Disability/genetics, Microcephaly/epidemiology, Microcephaly/genetics, Nervous System Malformations/epidemiology, Nervous System Malformations/genetics, Schizophrenia/epidemiology, Schizophrenia/genetics, medicine.disease, 030104 developmental biology, Chromosomes, Human, Pair 16, Schizophrenia, Autism, Human medicine, 030217 neurology & neurosurgery
Abstract

Contains fulltext : 167711.pdf (Publisher’s version ) (Closed access) IMPORTANCE: The 16p11.2 BP4-BP5 duplication is the copy number variant most frequently associated with autism spectrum disorder (ASD), schizophrenia, and comorbidities such as decreased body mass index (BMI). OBJECTIVES: To characterize the effects of the 16p11.2 duplication on cognitive, behavioral, medical, and anthropometric traits and to understand the specificity of these effects by systematically comparing results in duplication carriers and reciprocal deletion carriers, who are also at risk for ASD. DESIGN, SETTING, AND PARTICIPANTS: This international cohort study of 1006 study participants compared 270 duplication carriers with their 102 intrafamilial control individuals, 390 reciprocal deletion carriers, and 244 deletion controls from European and North American cohorts. Data were collected from August 1, 2010, to May 31, 2015 and analyzed from January 1 to August 14, 2015. Linear mixed models were used to estimate the effect of the duplication and deletion on clinical traits by comparison with noncarrier relatives. MAIN OUTCOMES AND MEASURES: Findings on the Full-Scale IQ (FSIQ), Nonverbal IQ, and Verbal IQ; the presence of ASD or other DSM-IV diagnoses; BMI; head circumference; and medical data. RESULTS: Among the 1006 study participants, the duplication was associated with a mean FSIQ score that was lower by 26.3 points between proband carriers and noncarrier relatives and a lower mean FSIQ score (16.2-11.4 points) in nonproband carriers. The mean overall effect of the deletion was similar (-22.1 points; P < .001). However, broad variation in FSIQ was found, with a 19.4- and 2.0-fold increase in the proportion of FSIQ scores that were very low (100) compared with the deletion group (P < .001). Parental FSIQ predicted part of this variation (approximately 36.0% in hereditary probands). Although the frequency of ASD was similar in deletion and duplication proband carriers (16.0% and 20.0%, respectively), the FSIQ was significantly lower (by 26.3 points) in the duplication probands with ASD. There also were lower head circumference and BMI measurements among duplication carriers, which is consistent with the findings of previous studies. CONCLUSIONS AND RELEVANCE: The mean effect of the duplication on cognition is similar to that of the reciprocal deletion, but the variance in the duplication is significantly higher, with severe and mild subgroups not observed with the deletion. These results suggest that additional genetic and familial factors contribute to this variability. Additional studies will be necessary to characterize the predictors of cognitive deficits.

Published
2016

24. DNAJC30disease-causing gene variants in a large Central European cohort of patients with suspected Leber’s hereditary optic neuropathy and optic atrophy

Author

Kieninger, Sinja, Xiao, Ting, Weisschuh, Nicole, Kohl, Susanne, Ru¨ther, Klaus, Kroisel, Peter Michael, Brockmann, Tobias, Knappe, Steffi, Kellner, Ulrich, Lagrèze, Wolf, Mazzola, Pascale, Haack, Tobias B, Wissinger, Bernd, and Tonagel, Felix

Abstract

BackgroundLeber’s hereditary optic neuropathy (LHON) has been considered a prototypical mitochondriopathy and a textbook example for maternal inheritance linked to certain disease-causing variants in the mitochondrial genome. Recently, an autosomal recessive form of LHON (arLHON) has been described, caused by disease-causing variants in the nuclear encoded gene DNAJC30.Methods and resultsIn this study, we screened the DNAJC30gene in a large Central European cohort of patients with a clinical diagnosis of LHON or other autosomal inherited optic atrophies (OA). We identified likely pathogenic variants in 35/1202 patients, corresponding to a detection rate of 2.9%. The previously described missense variant c.152A>G;p.(Tyr51Cys) accounts for 90% of disease-associated alleles in our cohort and we confirmed a strong founder effect. Furthermore, we identified two novel pathogenic variants in DNAJC30: the nonsense variant c.610G>T;p.(Glu204*) and the in-frame deletion c.230_232del;p.(His77del). Clinical investigation of the patients with arLHON revealed a younger age of onset, a more frequent bilateral onset and an increased clinically relevant recovery compared with LHON associated with disease-causing variants in the mitochondrial DNA.ConclusionThis study expands previous findings on arLHON and emphasises the importance of DNAJC30in the genetic diagnostics of LHON and OA in European patients.

Published
2022
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26. The genomic landscape of balanced cytogenetic abnormalities associated with human congenital anomalies

Author

Redin, C. (Claire), Brand, H. (Harrison), Collins, R.L. (Ryan L.), Kammin, T. (Tammy), Mitchell, E. (Elyse), Hodge, J.C. (Jennelle C.), Hanscom, C. (Carrie), Pillalamarri, V. (Vamsee), Seabra, C.M. (Catarina M.), Abbott, M.-A. (Mary-Alice), Abdul-Rahman, O.A. (Omar), Aberg, E. (Erika), Adley, R. (Rhett), Alcaraz-Estrada, S.L. (Sofia L.), Alkuraya, F.S. (Fowzan S), An, Y. (Yu), Anderson, M.-A. (Mary-Anne), Antolik, C. (Caroline), Anyane-Yeboa, K. (Kwame), Atkin, J.F. (Joan), Bartell, T. (Tina), Bernstein, J.A. (Jonathan A.), Beyer, E. (Elizabeth), Blumenthal, I. (Ian), Bongers, E. (Ernie), Brilstra, E.H. (Eva H.), Brown, C.W. (Chester W.), Brüggenwirth, H.T. (Hennie), Callewaert, L., Chiang, C. (Colby), Corning, K. (Ken), Cox, H. (H.), Cuppen, E. (Edwin), Currall, B.B. (Benjamin B.), Cushing, T. (Tom), David, D. (Dezso), Deardorff, M.A. (Matthew), Dheedene, A. (Annelies), D'Hooghe, M. (Marc), Vries, B. (Boukje) de, Earl, D.L. (Dawn L.), Ferguson, H.L. (Heather L.), Fisher, H. (Heather), Fitzpatrick, D.R. (David R.), Gerrol, P. (Pamela), Giachino, D. (Daniela), Glessner, J.T. (Joseph T.), Gliem, T. (Troy), Grady, M. (Margo), Graham, B.H. (Brett H.), Griffis, C. (Cristin), Gripp, K.W. (Karen), Gropman, A.L. (Andrea L.), Hanson-Kahn, A. (Andrea), Harris, D.J. (David J.), Hayden, M.A. (Mark A.), Hill, R. (Rosamund), Hochstenbach, R. (Ron), Hoffman, J.D. (Jodi D.), Hopkin, R., Hubshman, M.W. (Monika W.), Innes, M., Irons, M. (Mira), Irving, M. (Melita), Jacobsen, J.C. (Jessie C.), Janssens, S. (Sandra), Jewett, T. (Tamison), Johnson, J.P. (John P.), Jongmans, M.C.J. (Marjolijn), Kahler, S.G. (Stephen G.), Koolen, D.A. (David), Korzelius, J. (Jerome), Kroisel, P. (Peter), Lacassie, Y. (Yves), Lawless, W. (William), Lemyre, E. (Emmanuelle), Leppig, K. (Kathy), Levin, A.V. (Alex V.), Li, H. (Haibo), Li, H. (Hong), Liao, E.C. (Eric C.), Lim, C. (Cynthia), Lose, E.J. (Edward J.), Lucente, D. (Diane), MacEra, M.J. (Michael J.), Manavalan, P. (Poornima), Mandrile, G. (Giorgia), Marcelis, C.L.M. (Carlo), Margolin, L. (Lauren), Mason, T. (Tamara), Masser-Frye, D. (Diane), McClellan, M.W. (Michael W.), Zepeda Mendoza, C.J. (Cinthya J.), Menten, B., Middelkamp, S. (Sjors), Mikami, L.R. (Liya R.), Moe, E. (Emily), Mohammed, S. (Shabaz), Mononen, T. (Tarja), Mortenson, M.E. (Megan E.), Moya, G. (Graciela), Nieuwint, A.W. (Aggie W.), Ordulu, Z. (Zehra), Parkash, S. (Sandhya), Pauker, S.P. (Susan P.), Pereira, S. (Shahrin), Perrin, D. (Danielle), Phelan, K. (Katy), Piña Aguilar, R.E. (Raul E.), Poddighe, P. (Pino), Pregno, G. (Giulia), Raskin, S. (Salmo), Reis, L. (Linda), Rhead, W. (William), Rita, D. (Debra), Renkens, I. (Ivo), Roelens, F. (Filip), Ruliera, J. (Jayla), Rump, P. (Patrick), Schilit, S.L.P. (Samantha L.P.), Shaheen, R. (Ranad), Sparkes, R. (Rebecca), Spiegel, E. (Erica), Stevens, B. (Blair), Stone, M.R. (Matthew R.), Tagoe, J. (Julia), Thakuria, J.V. (Joseph V.), Bon, B. (Bregje) van, van de Kamp, J.M. (Jiddeke M.), Van Der Burgt, I. (Ineke), Essen, T. (Ton) van, Ravenswaaij-Arts, C.M.A. (Conny) van, Van Roosmalen, M.J. (Markus J.), Vergult, S. (Sarah), Volker-Touw, C.M.L. (Catharina M.L.), Warburton, D. (Dorothy), Waterman, M.J. (Matthew J.), Wiley, S. (Susan), Wilson, A. (Anna), Yerena-De Vega, M.D.L.C.A. (Maria De La Concepcion A), Zori, R.T. (Roberto T.), Levy, B. (Brynn), Brunner, H.G. (Han), Leeuw, N. (Nicole) de, Kloosterman, W.P. (Wigard), Thorland, E.C. (Erik C.), Morton, C.C. (Cynthia), Gusella, J.F. (James), Talkowski, M.E. (Michael E.), Redin, C. (Claire), Brand, H. (Harrison), Collins, R.L. (Ryan L.), Kammin, T. (Tammy), Mitchell, E. (Elyse), Hodge, J.C. (Jennelle C.), Hanscom, C. (Carrie), Pillalamarri, V. (Vamsee), Seabra, C.M. (Catarina M.), Abbott, M.-A. (Mary-Alice), Abdul-Rahman, O.A. (Omar), Aberg, E. (Erika), Adley, R. (Rhett), Alcaraz-Estrada, S.L. (Sofia L.), Alkuraya, F.S. (Fowzan S), An, Y. (Yu), Anderson, M.-A. (Mary-Anne), Antolik, C. (Caroline), Anyane-Yeboa, K. (Kwame), Atkin, J.F. (Joan), Bartell, T. (Tina), Bernstein, J.A. (Jonathan A.), Beyer, E. (Elizabeth), Blumenthal, I. (Ian), Bongers, E. (Ernie), Brilstra, E.H. (Eva H.), Brown, C.W. (Chester W.), Brüggenwirth, H.T. (Hennie), Callewaert, L., Chiang, C. (Colby), Corning, K. (Ken), Cox, H. (H.), Cuppen, E. (Edwin), Currall, B.B. (Benjamin B.), Cushing, T. (Tom), David, D. (Dezso), Deardorff, M.A. (Matthew), Dheedene, A. (Annelies), D'Hooghe, M. (Marc), Vries, B. (Boukje) de, Earl, D.L. (Dawn L.), Ferguson, H.L. (Heather L.), Fisher, H. (Heather), Fitzpatrick, D.R. (David R.), Gerrol, P. (Pamela), Giachino, D. (Daniela), Glessner, J.T. (Joseph T.), Gliem, T. (Troy), Grady, M. (Margo), Graham, B.H. (Brett H.), Griffis, C. (Cristin), Gripp, K.W. (Karen), Gropman, A.L. (Andrea L.), Hanson-Kahn, A. (Andrea), Harris, D.J. (David J.), Hayden, M.A. (Mark A.), Hill, R. (Rosamund), Hochstenbach, R. (Ron), Hoffman, J.D. (Jodi D.), Hopkin, R., Hubshman, M.W. (Monika W.), Innes, M., Irons, M. (Mira), Irving, M. (Melita), Jacobsen, J.C. (Jessie C.), Janssens, S. (Sandra), Jewett, T. (Tamison), Johnson, J.P. (John P.), Jongmans, M.C.J. (Marjolijn), Kahler, S.G. (Stephen G.), Koolen, D.A. (David), Korzelius, J. (Jerome), Kroisel, P. (Peter), Lacassie, Y. (Yves), Lawless, W. (William), Lemyre, E. (Emmanuelle), Leppig, K. (Kathy), Levin, A.V. (Alex V.), Li, H. (Haibo), Li, H. (Hong), Liao, E.C. (Eric C.), Lim, C. (Cynthia), Lose, E.J. (Edward J.), Lucente, D. (Diane), MacEra, M.J. (Michael J.), Manavalan, P. (Poornima), Mandrile, G. (Giorgia), Marcelis, C.L.M. (Carlo), Margolin, L. (Lauren), Mason, T. (Tamara), Masser-Frye, D. (Diane), McClellan, M.W. (Michael W.), Zepeda Mendoza, C.J. (Cinthya J.), Menten, B., Middelkamp, S. (Sjors), Mikami, L.R. (Liya R.), Moe, E. (Emily), Mohammed, S. (Shabaz), Mononen, T. (Tarja), Mortenson, M.E. (Megan E.), Moya, G. (Graciela), Nieuwint, A.W. (Aggie W.), Ordulu, Z. (Zehra), Parkash, S. (Sandhya), Pauker, S.P. (Susan P.), Pereira, S. (Shahrin), Perrin, D. (Danielle), Phelan, K. (Katy), Piña Aguilar, R.E. (Raul E.), Poddighe, P. (Pino), Pregno, G. (Giulia), Raskin, S. (Salmo), Reis, L. (Linda), Rhead, W. (William), Rita, D. (Debra), Renkens, I. (Ivo), Roelens, F. (Filip), Ruliera, J. (Jayla), Rump, P. (Patrick), Schilit, S.L.P. (Samantha L.P.), Shaheen, R. (Ranad), Sparkes, R. (Rebecca), Spiegel, E. (Erica), Stevens, B. (Blair), Stone, M.R. (Matthew R.), Tagoe, J. (Julia), Thakuria, J.V. (Joseph V.), Bon, B. (Bregje) van, van de Kamp, J.M. (Jiddeke M.), Van Der Burgt, I. (Ineke), Essen, T. (Ton) van, Ravenswaaij-Arts, C.M.A. (Conny) van, Van Roosmalen, M.J. (Markus J.), Vergult, S. (Sarah), Volker-Touw, C.M.L. (Catharina M.L.), Warburton, D. (Dorothy), Waterman, M.J. (Matthew J.), Wiley, S. (Susan), Wilson, A. (Anna), Yerena-De Vega, M.D.L.C.A. (Maria De La Concepcion A), Zori, R.T. (Roberto T.), Levy, B. (Brynn), Brunner, H.G. (Han), Leeuw, N. (Nicole) de, Kloosterman, W.P. (Wigard), Thorland, E.C. (Erik C.), Morton, C.C. (Cynthia), Gusella, J.F. (James), and Talkowski, M.E. (Michael E.)

Abstract

Despite the clinical significance of balanced chromosomal abnormalities (BCAs), their characterization has largely been restricted to cytogenetic resolution. We explored the landscape of BCAs at nucleotide resolution in 273 subjects with a spectrum of congenital anomalies. Whole-genome sequencing revised 93% of karyotypes and demonstrated complexity that was cryptic to karyotyping in 21% of BCAs, highlighting the limitations of conventional cytogenetic approaches. At least 33.9% of BCAs resulted in gene disruption that likely contributed to the developmental phenotype, 5.2% were associated with pathogenic genomic imbalances, and 7.3% disrupted topologically associated domains (TADs) encompassing known syndromic loci. Remarkably, BCA br

Published
2017
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30. Sex. Dev

Author

Jakubiczka, S., Schröder, C., Ullmann, R., Volleth, M., Ledig, S., Gilberg, E., Kroisel, P., and P. Wieacker, P.

Abstract

Campomelic dysplasia (MIM 114290) is a severe malformation syndrome frequently accompanied by male-to-female sex reversal. Causative are mutations within the SOX9 gene on 17q24.3 as well as chromosomal aberrations (translocations, inversions or deletions) in the vicinity of SOX9 . Here, we report on a patient with muscular hypotonia, craniofacial dysmorphism, cleft palate, brachydactyly, malformations of thoracic spine, and gonadal dysgenesis with female external genitalia and müllerian duct derivatives in the presence of a male karyotype. X-ray examination and clinical examinations revealed no signs of campomelia. The combination of molecular cytogenetic analysis and array CGH revealed an unbalanced translocation between one chromosome 7 and one chromosome 17 [46,XY,t(7; 17)(q33;q24).ish t(7; 17) (wcp7+,wcp17+;wcp7+wcp17+)] with a deletion of approximately 4.2 Mb located about 0.5 Mb upstream of SOX9 . STS analysis confirmed the deletion of chromosome 17, which has occurred de novo on the paternal chromosome. The proximal breakpoint on chromosome 17 is localized outside the known breakpoint cluster regions. The deletion on chromosome 17q24 removes several genes. Among these genes PRKAR1A is deleted. Inactivating mutations of PRKAR1A cause Carney complex. To our knowledge, this is the first report of a patient with acampomelic campomelic dysplasia, carrying both a deletion and a translocation.

Published
2010

33. Complete coding sequence, exon/intron arrangement and chromosome location of ZNF45, a KRAB-domain-containing gene

Author

Constantinou-Deltas, Constantinos D., Bashiardes, Evy, Patsalis, Philippos C., Hadjimarcou, Michael I., Kroisel, P. M., Ioannou, Petros A. 1953, Roses, A. D., Lee, J. E., and Constantinou-Deltas, Constantinos D. [0000-0001-5549-9169]

Subjects
molecular cloning, zinc finger protein, intron, polymerase chain reaction, Molecular Sequence Data, chromosome 19q, Consensus Sequence, Humans, human, exon, Amino Acid Sequence, gene library, In Situ Hybridization, Fluorescence, Base Sequence, article, Chromosome Mapping, nucleotide sequence, Exons, rna splicing, gene structure, chromosomal localization, Introns, Protein Structure, Tertiary, Repressor Proteins, sequence tagged site, priority journal, Genes, Multigene Family, Chromosomes, Human, Pair 19, Sequence Alignment
Abstract

Zinc finger genes represent a large multigene family present in mammalian and other genomes. A subgroup of these genes contain a conserved motif, the KRAB domain, at the NH2-terminal region, which was recently shown to posses a potent transcriptional repression activity. For one such gene, ZNF45, we determined the complete coding sequence, along with the exon/intron arrangement and the splice junctions. Exon 2 codes exclusively for the KRAB-A element of 42 amino acids, and exon 4 contains the 19 zinc finger repeats. In addition, we generated an EST (expressed sequence tag) from the 3'-end of ZNF45 that we used for polymerase chain reaction screening of a P1-derived genomic library. We isolated a 65-kb clone that was used for localizing this gene on chromosome 19q13.2 by fluorescence in situ hybridization. 75 230 233 Cited By :9

Published
1996

34. Autosomal Recessive Keratoderma-Ichthyosis-Deafness (ARKID) Syndrome Is Caused by VPS33BMutations Affecting Rab Protein Interaction and Collagen Modification

Author

Gruber, Robert, Rogerson, Clare, Windpassinger, Christian, Banushi, Blerida, Straatman-Iwanowska, Anna, Hanley, Joanna, Forneris, Federico, Strohal, Robert, Ulz, Peter, Crumrine, Debra, Menon, Gopinathan K., Blunder, Stefan, Schmuth, Matthias, Müller, Thomas, Smith, Holly, Mills, Kevin, Kroisel, Peter, Janecke, Andreas R., and Gissen, Paul

Abstract

In this paper, we report three patients with severe palmoplantar keratoderma associated with ichthyosis and sensorineural deafness. Biallelic mutations were found in VPS33B, encoding VPS33B, a Sec1/Munc18 family protein that interacts with Rab11a and Rab25 proteins and is involved in trafficking of the collagen-modifying enzyme LH3. Two patients were homozygous for the missense variant p.Gly131Glu, whereas one patient was compound heterozygous for p.Gly131Glu and the splice site mutation c.240-1G>C, previously reported in patients with arthrogryposis renal dysfunction and cholestasis syndrome. We demonstrated the pathogenicity of variant p.Gly131Glu by assessing the interactions of the mutant VPS33Bconstruct and its ability to traffic LH3. Compared with wild-type VPS33B, the p.Gly131Glu mutant VPS33B had reduced coimmunoprecipitation and colocalization with Rab11a and Rab25 and did not rescue LH3 trafficking. Confirming the cell-based experiments, we found deficient LH3-specific collagen lysine modifications in patients’ urine and skin fibroblasts. Additionally, the epidermal ultrastructure of the p.Gly131Glu patients mirrored defects in tamoxifen-inducible VPS33B-deficient Vps33bfl/fl-ERT2mice. Both patients and murine models revealed an impaired epidermal structure, ascribed to aberrant secretion of lamellar bodies, which are essential for epidermal barrier formation. Our results demonstrate that p.Gly131Glu mutant VPS33B causes an autosomal recessive keratoderma-ichthyosis-deafness syndrome.

Published
2017
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35. The genomic landscape of balanced cytogenetic abnormalities associated with human congenital anomalies

Author

Redin, Claire, Brand, Harrison, Collins, Ryan L, Kammin, Tammy, Mitchell, Elyse, Hodge, Jennelle C, Hanscom, Carrie, Pillalamarri, Vamsee, Seabra, Catarina M, Abbott, Mary-Alice, Abdul-Rahman, Omar A, Aberg, Erika, Adley, Rhett, Alcaraz-Estrada, Sofia L, Alkuraya, Fowzan S, An, Yu, Anderson, Mary-Anne, Antolik, Caroline, Anyane-Yeboa, Kwame, Atkin, Joan F, Bartell, Tina, Bernstein, Jonathan A, Beyer, Elizabeth, Blumenthal, Ian, Bongers, Ernie M H F, Brilstra, Eva H, Brown, Chester W, Brüggenwirth, Hennie T, Callewaert, Bert, Chiang, Colby, Corning, Ken, Cox, Helen, Cuppen, Edwin, Currall, Benjamin B, Cushing, Tom, David, Dezso, Deardorff, Matthew A, Dheedene, Annelies, D'Hooghe, Marc, de Vries, Bert B A, Earl, Dawn L, Ferguson, Heather L, Fisher, Heather, FitzPatrick, David R, Gerrol, Pamela, Giachino, Daniela, Glessner, Joseph T, Gliem, Troy, Grady, Margo, Graham, Brett H, Griffis, Cristin, Gripp, Karen W, Gropman, Andrea L, Hanson-Kahn, Andrea, Harris, David J, Hayden, Mark A, Hill, Rosamund, Hochstenbach, Ron, Hoffman, Jodi D, Hopkin, Robert J, Hubshman, Monika W, Innes, A Micheil, Irons, Mira, Irving, Melita, Jacobsen, Jessie C, Janssens, Sandra, Jewett, Tamison, Johnson, John P, Jongmans, Marjolijn C, Kahler, Stephen G, Koolen, David A, Korzelius, Jerome, Kroisel, Peter M, Lacassie, Yves, Lawless, William, Lemyre, Emmanuelle, Leppig, Kathleen, Levin, Alex V, Li, Haibo, Li, Hong, Liao, Eric C, Lim, Cynthia, Lose, Edward J, Lucente, Diane, Macera, Michael J, Manavalan, Poornima, Mandrile, Giorgia, Marcelis, Carlo L, Margolin, Lauren, Mason, Tamara, Masser-Frye, Diane, McClellan, Michael W, Mendoza, Cinthya J Zepeda, Menten, Björn, Middelkamp, Sjors, Mikami, Liya R, Moe, Emily, Mohammed, Shehla, Mononen, Tarja, Mortenson, Megan E, Moya, Graciela, Nieuwint, Aggie W, Ordulu, Zehra, Parkash, Sandhya, Pauker, Susan P, Pereira, Shahrin, Perrin, Danielle, Phelan, Katy, Aguilar, Raul E Piña, Poddighe, Pino J, Pregno, Giulia, Raskin, Salmo, Reis, Linda, Rhead, William, Rita, Debra, Renkens, Ivo, Roelens, Filip, Ruliera, Jayla, Rump, Patrick, Schilit, Samantha L P, Shaheen, Ranad, Sparkes, Rebecca, Spiegel, Erica, Stevens, Blair, Stone, Matthew R, Tagoe, Julia, Thakuria, Joseph V, van Bon, Bregje W, van de Kamp, Jiddeke, van Der Burgt, Ineke, van Essen, Ton, van Ravenswaaij-Arts, Conny M, van Roosmalen, Markus J, Vergult, Sarah, Volker-Touw, Catharina M L, Warburton, Dorothy P, Waterman, Matthew J, Wiley, Susan, Wilson, Anna, Yerena-de Vega, Maria de la Concepcion A, Zori, Roberto T, Levy, Brynn, Brunner, Han G, de Leeuw, Nicole, Kloosterman, Wigard P, Thorland, Erik C, Morton, Cynthia C, Gusella, James F, and Talkowski, Michael E

Abstract

Despite the clinical significance of balanced chromosomal abnormalities (BCAs), their characterization has largely been restricted to cytogenetic resolution. We explored the landscape of BCAs at nucleotide resolution in 273 subjects with a spectrum of congenital anomalies. Whole-genome sequencing revised 93% of karyotypes and demonstrated complexity that was cryptic to karyotyping in 21% of BCAs, highlighting the limitations of conventional cytogenetic approaches. At least 33.9% of BCAs resulted in gene disruption that likely contributed to the developmental phenotype, 5.2% were associated with pathogenic genomic imbalances, and 7.3% disrupted topologically associated domains (TADs) encompassing known syndromic loci. Remarkably, BCA breakpoints in eight subjects altered a single TAD encompassing MEF2C, a known driver of 5q14.3 microdeletion syndrome, resulting in decreased MEF2C expression. We propose that sequence-level resolution dramatically improves prediction of clinical outcomes for balanced rearrangements and provides insight into new pathogenic mechanisms, such as altered regulation due to changes in chromosome topology.

Published
2017
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40. Quality guidelines and standards for genetic laboratories/clinics in prenatal diagnosis on fetal samples obtained by invasive procedures - An attempt to establish a common European framework for quality assessment

Author

Kroisel, P, Fryns, J, Matthijs, G, Brondum-Nielsen, K, Vejerslev, L, von Koskull, H, Giraudon, E, Saura, R, Held, K, Muller-Reible, C, Metaxotou, C, Genuardi, Maurizio, Piombo, G, Schneider, Federico, Smeets, D, van den Ouweland, A, Pacheco, P, Correia, H, Binkert, F, Gabarron, J, Gallano, P, Kristoffersson, U, Anvret, M, Howell, R, Stenhouse, S, Genuardi, M (ORCID:0000-0002-7410-8351), Schneider, F, Kroisel, P, Fryns, J, Matthijs, G, Brondum-Nielsen, K, Vejerslev, L, von Koskull, H, Giraudon, E, Saura, R, Held, K, Muller-Reible, C, Metaxotou, C, Genuardi, Maurizio, Piombo, G, Schneider, Federico, Smeets, D, van den Ouweland, A, Pacheco, P, Correia, H, Binkert, F, Gabarron, J, Gallano, P, Kristoffersson, U, Anvret, M, Howell, R, Stenhouse, S, Genuardi, M (ORCID:0000-0002-7410-8351), and Schneider, F

Abstract

At a workshop in Leuven, November 8-10, 1996, 24 clinical and laboratory geneticists from 15 countries in Europe met and discussed minimum standards for prenatal diagnosis. These guidelines are intended for use as a reference manual by genetic centres all over Europe, especially in countries without national guidelines, in their efforts to achieve and maintain high standards. The workshop was restricted to discuss quality assessment on established invasive procedures for cytogenetic and molecular studies. The committee brought together from their own countries substantial experience of genetic counselling, cytogenetics, molecular biology and quality assessment. It is hoped that future discussions, embracing all aspects of clinical and laboratory genetic services will lead to the establishment of common guidelines for all European countries.

Published
1997

44. Characterization of a de novo complex chromosome rearrangement (CCR) involving chromosomes 2 and 12, associated with mental retardation and impaired speech development.

Author

Schwarzbraun, T., Ullmann, R., Schubert, M., Ledinegg, M., Ofner, L., Windpassinger, C., Wagner, K., Kroisel, P. M., and Petek, E.

Subjects
CHROMOSOME analysis, INTELLECTUAL disabilities, SPEECH disorders, GENE mapping, BACTERIAL artificial chromosomes, FLUORESCENCE in situ hybridization, KARYOTYPES, CYTOGENETICS
Abstract

We report on a currently six-year-old patient with a de novo complex chromosome rearrangement (CCR) involving chromosomes 2 and 12. A translocation 2;12 that appeared to be reciprocal after standard banding turned out to be a complex event with seven breaks after molecular cytogenetic analyses. Array CGH analysis showed no imbalances at the breakpoints but revealed an additional microdeletion of about 80 kb on chromosome 11. The same deletion was also present in the phenotypically normal father. The patient showed relatively mild mental retardation, defined mainly as impaired speech development (orofacial dyspraxia) and psychomotor retardation. In addition, mild dysmorphic facial features like hypertelorism, a prominent philtrum and down-turned corners of the mouth were observed. We narrowed down all breakpoint regions to about 100 kb, using a panel of mapped bacterial artificial chromosome (BAC) clones for fluorescence in situ hybridization (FISH). BACs spanning or flanking all seven breakpoints were identified and no chromosomal imbalances were found consistent with the array CGH results. Our investigations resulted in the following karyotype: 46,XY,t(2;12)(2pter→2p25.3::2p23.3→2p25.2::2p23.3→2p14::2q14.3→2p14::2q14.3→2q14.3::12q 12→12qter;12pter→12q12::2p25.3→2p25.2::2q14.3→2qter). Copyright © 2006 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

Published
2006
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47. Characterization of a de novo translocation t5;18q33.1;q12.1 in an autistic boy identifies a breakpoint close to SH3TC2, ADRB2, and HTR4on 5q, and within the desmocollin gene cluster on 18qPlease cite this article as follows: Vincent JB, Noor A, Windpassinger C, Gianakopoulos PJ, Schwarzbraun T, Alfred SE, Stachowiak B, Scherer SW, Roberts W, Wagner K, Kroisel PM, Petek E. 2009. Characterization of a De Novo Translocation t5;18q33.1;q12.1 in an Autistic Boy Identifies a Breakpoint Close to SH3TC2, ADRB2, and HTR4on 5q, and Within the Desmocollin Gene Cluster on 18q. Am J Med Genet Part B 150B:817–826.

Author

Vincent, John B., Noor, Abdul, Windpassinger, Christian, Gianakopoulos, Peter J., Schwarzbraun, Thomas, Alfred, Simon E., Stachowiak, Beata, Scherer, Stephen W., Roberts, Wendy, Wagner, Klaus, Kroisel, Peter M., and Petek, Erwin

Abstract

We have recently reported the identification of a de novo balanced translocation t5;18q33.1;q12.1 in a boy with autism. Here we discuss the identification of the breakpoints on chromosomes 5 and 18, and subsequent genomic and candidate gene analyses. The 18q breakpoint lies between desmocollin genes DSC1and DSC2. The chromosome 5 breakpoint lies at the 3′ end of the SH3TC2gene and distal to βadrenergic receptor gene ADRB2and serotonin receptor gene HTR4. We hypothesized that the transcription of one or more of these genes is affected by the translocation by position effect. Looking at allelespecific gene expression for the genes at the 5q locus, we were able to determine that ADRB2is expressed from both the normal and derivative alleles. Due to the lack of expression in available tissues or lack of available informative transcribed SNPs, we were unable to exclude the involvement of SH3TC2and HTR4due to position effect. However, we determined that both DSC1and DSC2are only transcribed from the normal chromosome 18 in lymphocytes from the proband. This monoallelic expression of DSC2may put the patient at risk for arrythmogenic right ventricular cardiomyopathy. Desmocollin genes encode celladhesion molecules, and are also highly expressed in brain regions, and thus may also be important for normal neuronal functioning. While a role for SH3TC2, ADRB2, and HTR4as putative candidate genes for autism cannot be discounted, a role for the desmocollin genes at the 18q breakpoint should also be considered. © 2008 WileyLiss, Inc.

Published
2009
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48. A new 3p interstitial deletion including the entire MITF gene causes a variation of Tietz/Waardenburg type IIA syndromesHow to cite this article: Schwarzbraun T, Ofner L, Gillessen‐Kaesbach G, Schaperdoth B, Preisegger K‐H, Windpassinger C, Wagner K, Petek E, Kroisel PM. 2007. A new 3p interstitial deletion including the entire MITF gene causes a variation of Tietz/Waardenburg type IIA syndromes. Am J Med Genet Part A 143A:619–624.

Author

Schwarzbraun, Thomas, Ofner, Lisa, Gillessen‐Kaesbach, Gabriele, Schaperdoth, Barbara, Preisegger, Karl‐Heinz, Windpassinger, Christian, Wagner, Klaus, Petek, Erwin, and Kroisel, Peter M.

Abstract

No Abstract.

Published
2007
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49. Molecular characterization of a 12q22-q24 deletion associated with congenital deafness: Confirmation and refinement of the DFNA25 locus

Author

Petek, Erwin, Windpassinger, Christian, Mach, Monika, Rauter, Ludwig, Scherer, Stephen W., Wagner, Klaus, and Kroisel, Peter M.

Abstract

The DFNA25 locus for autosomal dominant nonsyndromic hereditary hearing loss has been mapped to 12q21-q24 by linkage analysis. A de novo deletion in a six-year-old boy with congenital hearing loss as well as mental and motor retardation now provides independent confirmation of this genetic localization and narrows the critical interval to 13 cM in the 12q22-q24.1 region. Mapping of the deletion was performed using fluorescence in situ hybridization (FISH) analysis with region-specific yeast artificial chromosome (YAC) clones. Ten YACs 929_e_4, 959_c_3, 746_h_7, 817_h_10, 886_a_6, 916_h_9, 969_c_12, 747_e_2, 812_h_12, and 959_f_8 were absent from one chromosome 12 from the patient. Molecular analyses of eight polymorphic markers helped to narrow down the breakpoints and demonstrated that the derivative chromosome 12 is of paternal origin. Several known genes including ATP2A2, UBE3B, and VR-OAC that map in the 12q22-q24.1 region are included in the deletion. These results provide evidence that haploinsufficiency for a gene or genes in 12q22-q24.1 is associated with autosomal dominant deafness. © 2003 Wiley-Liss, Inc.

Published
2003
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50. Detection and relocation of cord blood nucleated red blood cells by laser scanning cytometry

Author

Hennerbichler, Simone, Schmied, Rudolf, Petek, Erwin, Kroisel, Peter M., Pertl, Barbara, Tiran, Beate, Dohr, Gottfried, Wintersteiger, Reinhold, and Sedlmayr, Peter

Abstract

Fetal nucleated red blood cells (NRBC) present in the peripheral blood of pregnant women at low frequency are a potential target for noninvasive prenatal diagnostics. CD71-enriched cells from male cord blood (CB) were stained for the gamma chain of HbF (Hb-γ) and cytocentrifuged. Fluorescence in situ hybridization (FISH) was done for the Y chromosome. Following staining of the nucleus with TO-PRO-3, laser scanning cytometry was performed. Artificial mixtures of small volumes of male CB and blood drawn from nonpregnant females were analyzed. In CB, 59% of events double positive for Hb-γ and TO-PRO-3 were identified as CB-NRBC. In contamination studies, male fetal CB-NRBC were identified perfectly on the basis of morphologic characteristics and FISH reactivity following relocation and visual assessment. Mean recovery was 8.7%. Laser scanning cytometry of preenriched fetal NRBC may offer a promising way for noninvasive prenatal diagnostics. This is because it provides a virtual enrichment step and the position on the slides of cells visually confirmed to correspond to fetal NRBC is known. Further experimental procedures on well-defined and located target cells may be feasible. Cytometry 48:87–92, 2002. © 2002 Wiley-Liss, Inc.

Published
2002
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