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2. Bardet-Biedl syndrome improved diagnosis criteria and management: Inter European Reference Networks consensus statement and recommendations

Author

Dollfus, Hélène, Lilien, Marc R., Maffei, Pietro, Verloes, Alain, Muller, Jean, Bacci, Giacomo M., Cetiner, Metin, van den Akker, Erica L. T., Grudzinska Pechhacker, Monika, Testa, Francesco, Lacombe, Didier, Stokman, Marijn F., Simonelli, Francesca, Gouronc, Aurélie, Gavard, Amélie, van Haelst, Mieke M., Koenig, Jens, Rossignol, Sylvie, Bergmann, Carsten, Zacchia, Miriam, Leroy, Bart P., Mosbah, Héléna, Van Eerde, Albertien M., Mekahli, Djalila, Servais, Aude, Poitou, Christine, and Valverde, Diana

Published
2024
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4. Neurocognitive profiles of 22q11.2 and 16p11.2 deletions and duplications

Author

Gur, Ruben C., Bearden, Carrie E., Jacquemont, Sebastien, Swillen, Ann, van Amelsvoort, Therese, van den Bree, Marianne, Vorstman, Jacob, Sebat, Jonathan, Ruparel, Kosha, Gallagher, Robert Sean, McClellan, Emily, White, Lauren, Crowley, Terrence Blaine, Giunta, Victoria, Kushan, Leila, O’Hora, Kathleen, Verbesselt, Jente, Vandensande, Ans, Vingerhoets, Claudia, van Haelst, Mieke, Hall, Jessica, Harwood, Janet, Chawner, Samuel J.R.A., Patel, Nishi, Palad, Katrina, Hong, Oanh, Guevara, James, Martin, Charles Olivier, Jizi, Khadije, Bélanger, Anne-Marie, Scherer, Stephen W., Bassett, Anne S., McDonald-McGinn, Donna M., and Gur, Raquel E.

Published
2025
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6. The detection of a strong episignature for Chung–Jansen syndrome, partially overlapping with Börjeson–Forssman–Lehmann and White–Kernohan syndromes

Author

Vos, Niels, Haghshenas, Sadegheh, van der Laan, Liselot, Russel, Perle K. M., Rooney, Kathleen, Levy, Michael A., Relator, Raissa, Kerkhof, Jennifer, McConkey, Haley, Maas, Saskia M., Vissers, Lisenka E. L. M., de Vries, Bert B. A., Pfundt, Rolph, Elting, Mariet W., van Hagen, Johanna M., Verbeek, Nienke E., Jongmans, Marjolijn C. J., Lakeman, Phillis, Rumping, Lynne, Bosch, Danielle G. M., Vitobello, Antonio, Thauvin-Robinet, Christel, Faivre, Laurence, Nambot, Sophie, Garde, Aurore, Willems, Marjolaine, Genevieve, David, Nicolas, Gaël, Busa, Tiffany, Toutain, Annick, Gérard, Marion, Bizaoui, Varoona, Isidor, Bertrand, Merla, Giuseppe, Accadia, Maria, Schwartz, Charles E., Ounap, Katrin, Hoffer, Mariëtte J. V., Nezarati, Marjan M., van den Boogaard, Marie-José H., Tedder, Matthew L., Rogers, Curtis, Brusco, Alfredo, Ferrero, Giovanni B., Spodenkiewicz, Marta, Sidlow, Richard, Mussa, Alessandro, Trajkova, Slavica, McCann, Emma, Mroczkowski, Henry J., Jansen, Sandra, Donker-Kaat, Laura, Duijkers, Floor A. M., Stuurman, Kyra E., Mannens, Marcel M. A. M., Alders, Mariëlle, Henneman, Peter, White, Susan M., Sadikovic, Bekim, and van Haelst, Mieke M.

Published
2024
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8. CUL3-related neurodevelopmental disorder: Clinical phenotype of 20 new individuals and identification of a potential phenotype-associated episignature

Author

van der Laan, Liselot, Silva, Ananília, Kleinendorst, Lotte, Rooney, Kathleen, Haghshenas, Sadegheh, Lauffer, Peter, Alanay, Yasemin, Bhai, Pratibha, Brusco, Alfredo, de Munnik, Sonja, de Vries, Bert B.A., Vega, Angelica Delgado, Engelen, Marc, Herkert, Johanna C., Hochstenbach, Ron, Hopman, Saskia, Kant, Sarina G., Kira, Ryutaro, Kato, Mitsuhiro, Keren, Boris, Kroes, Hester Y., Levy, Michael A., Lock-Hock, Ngu, Maas, Saskia M., Mancini, Grazia M.S., Marcelis, Carlo, Matsumoto, Naomichi, Mizuguchi, Takeshi, Mussa, Alessandro, Mignot, Cyril, Närhi, Anu, Nordgren, Ann, Pfundt, Rolph, Polstra, Abeltje M., Trajkova, Slavica, van Bever, Yolande, José van den Boogaard, Marie, van der Smagt, Jasper J., Barakat, Tahsin Stefan, Alders, Mariëlle, Mannens, Marcel M.A.M., Sadikovic, Bekim, van Haelst, Mieke M., and Henneman, Peter

Published
2025
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9. Microduplications of ARID1A and ARID1B cause a novel clinical and epigenetic distinct BAFopathy

Author

van der Sluijs, Pleuntje J., Moutton, Sébastien, Dingemans, Alexander J.M., Weis, Denisa, Levy, Michael A., Boycott, Kym M., Arberas, Claudia, Baldassarri, Margherita, Beneteau, Claire, Brusco, Alfredo, Coutton, Charles, Dabir, Tabib, Dentici, Maria L., Devriendt, Koenraad, Faivre, Laurence, van Haelst, Mieke M., Jizi, Khadije, Kempers, Marlies J., Kerkhof, Jennifer, Kharbanda, Mira, Lachlan, Katherine, Marle, Nathalie, McConkey, Haley, Mencarelli, Maria A., Mowat, David, Niceta, Marcello, Nicolas, Claire, Novelli, Antonio, Orlando, Valeria, Pichon, Olivier, Rankin, Julia, Relator, Raissa, Ropers, Fabienne G., Rosenfeld, Jill A., Sachdev, Rani, Sandaradura, Sarah A., Shukarova-Angelovska, Elena, Steenbeek, Duco, Tartaglia, Marco, Tedder, Matthew A., Trajkova, Slavica, Winer, Norbert, Woods, Jeremy, de Vries, Bert B.A., Sadikovic, Bekim, Alders, Marielle, and Santen, Gijs W.E.

Published
2025
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10. Delineation of the adult phenotype of Coffin–Siris syndrome in 35 individuals

Author

Schmetz, Ariane, Lüdecke, Hermann-Josef, Surowy, Harald, Sivalingam, Sugirtahn, Bruel, Ange-Line, Caumes, Roseline, Charles, Perrine, Chatron, Nicolas, Chrzanowska, Krystyna, Codina-Solà, Marta, Colson, Cindy, Cuscó, Ivon, Denommé-Pichon, Anne-Sophie, Edery, Patrick, Faivre, Laurence, Green, Andrew, Heide, Solveig, Hsieh, Tzung-Chien, Hustinx, Alexander, Kleinendorst, Lotte, Knopp, Cordula, Kraft, Florian, Krawitz, Peter M., Lasa-Aranzasti, Amaia, Lesca, Gaetan, López-González, Vanesa, Maraval, Julien, Mignot, Cyril, Neuhann, Teresa, Netzer, Christian, Oehl-Jaschkowitz, Barbara, Petit, Florence, Philippe, Christophe, Posmyk, Renata, Putoux, Audrey, Reis, André, Sánchez-Soler, María José, Suh, Julia, Tkemaladze, Tinatin, Tran Mau Them, Frédéric, Travessa, André, Trujillano, Laura, Valenzuela, Irene, van Haelst, Mieke M., Vasileiou, Georgia, Vincent-Delorme, Catherine, Walther, Mona, Verde, Pablo, Bramswig, Nuria C., and Wieczorek, Dagmar

Published
2024
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13. PSMD11 loss-of-function variants correlate with a neurobehavioral phenotype, obesity, and increased interferon response

Author

Deb, Wallid, Rosenfelt, Cory, Vignard, Virginie, Papendorf, Jonas Johannes, Möller, Sophie, Wendlandt, Martin, Studencka-Turski, Maja, Cogné, Benjamin, Besnard, Thomas, Ruffier, Léa, Toutain, Bérénice, Poirier, Léa, Cuinat, Silvestre, Kritzer, Amy, Crunk, Amy, diMonda, Janette, Vengoechea, Jaime, Mercier, Sandra, Kleinendorst, Lotte, van Haelst, Mieke M., Zuurbier, Linda, Sulem, Telma, Katrínardóttir, Hildigunnur, Friðriksdóttir, Rún, Sulem, Patrick, Stefansson, Kari, Jonsdottir, Berglind, Zeidler, Shimriet, Sinnema, Margje, Stegmann, Alexander P.A., Naveh, Natali, Skraban, Cara M., Gray, Christopher, Murrell, Jill R., Isikay, Sedat, Pehlivan, Davut, Calame, Daniel G., Posey, Jennifer E., Nizon, Mathilde, McWalter, Kirsty, Lupski, James R., Isidor, Bertrand, Bolduc, François V., Bézieau, Stéphane, Krüger, Elke, Küry, Sébastien, and Ebstein, Frédéric

Published
2024
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14. DNA methylation episignature, extension of the clinical features, and comparative epigenomic profiling of Hao-Fountain syndrome caused by variants in USP7

Author

van der Laan, Liselot, Karimi, Karim, Rooney, Kathleen, Lauffer, Peter, McConkey, Haley, Caro, Pilar, Relator, Raissa, Levy, Michael A., Bhai, Pratibha, Mignot, Cyril, Keren, Boris, Briuglia, Silvana, Sobering, Andrew K., Li, Dong, Vissers, Lisenka E.L.M., Dingemans, Alexander J.M., Valenzuela, Irene, Verberne, Eline A., Misra-Isrie, Mala, Zwijnenburg, Petra J.G., Waisfisz, Quinten, Alders, Mariëlle, Sailer, Sebastian, Schaaf, Christian P., Mannens, Marcel M.A.M., Sadikovic, Bekim, van Haelst, Mieke M., and Henneman, Peter

Published
2024
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17. The neurodevelopmental and facial phenotype in individuals with a TRIP12 variant

Author

Aerden, Mio, Denommé-Pichon, Anne-Sophie, Bonneau, Dominique, Bruel, Ange-Line, Delanne, Julian, Gérard, Bénédicte, Mazel, Benoît, Philippe, Christophe, Pinson, Lucile, Prouteau, Clément, Putoux, Audrey, Tran Mau-Them, Frédéric, Viora-Dupont, Éléonore, Vitobello, Antonio, Ziegler, Alban, Piton, Amélie, Isidor, Bertrand, Francannet, Christine, Maillard, Pierre-Yves, Julia, Sophie, Philippe, Anais, Schaefer, Elise, Koene, Saskia, Ruivenkamp, Claudia, Hoffer, Mariette, Legius, Eric, Theunis, Miel, Keren, Boris, Buratti, Julien, Charles, Perrine, Courtin, Thomas, Misra-Isrie, Mala, van Haelst, Mieke, Waisfisz, Quinten, Wieczorek, Dagmar, Schmetz, Ariane, Herget, Theresia, Kortüm, Fanny, Lisfeld, Jasmin, Debray, François-Guillaume, Bramswig, Nuria C., Atallah, Isis, Fodstad, Heidi, Jouret, Guillaume, Almoguera, Berta, Tahsin-Swafiri, Saoud, Santos-Simarro, Fernando, Palomares-Bralo, Maria, López-González, Vanesa, Kibaek, Maria, Tørring, Pernille M., Renieri, Alessandra, Bruno, Lucia Pia, Õunap, Katrin, Wojcik, Monica, Hsieh, Tzung-Chien, Krawitz, Peter, and Van Esch, Hilde

Published
2023
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19. DNA methylation episignature and comparative epigenomic profiling of HNRNPU-related neurodevelopmental disorder

Author

Rooney, Kathleen, van der Laan, Liselot, Trajkova, Slavica, Haghshenas, Sadegheh, Relator, Raissa, Lauffer, Peter, Vos, Niels, Levy, Michael A., Brunetti-Pierri, Nicola, Terrone, Gaetano, Mignot, Cyril, Keren, Boris, de Villemeur, Thierry B., Volker-Touw, Catharina M.L., Verbeek, Nienke, van der Smagt, Jasper J., Oegema, Renske, Brusco, Alfredo, Ferrero, Giovanni B., Misra-Isrie, Mala, Hochstenbach, Ron, Alders, Mariëlle, Mannens, Marcel M.A.M., Sadikovic, Bekim, van Haelst, Mieke M., and Henneman, Peter

Published
2023
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20. Variants in SCAF4 Cause a Neurodevelopmental Disorder and Are Associated with Impaired mRNA Processing

Author

Fliedner, Anna, Kirchner, Philipp, Wiesener, Antje, van de Beek, Irma, Waisfisz, Quinten, van Haelst, Mieke, Scott, Daryl A, Lalani, Seema R, Rosenfeld, Jill A, Azamian, Mahshid S, Xia, Fan, Dutra-Clarke, Marina, Martinez-Agosto, Julian A, Lee, Hane, Center, UCLA Clinical Genomics, Nelson, Stanley F, Grody, Wayne W, Deignan, Joshua L, Kang, Sung-Hae, Arboleda, Valerie A, Senaratne, T Niroshi, Dorrani, Naghmeh, Dutra-Clarke, Marina S, Kianmahd, Jessica, Hinkamp, Franceska L, Neustadt, Ahna M, Fogel, Brent L, Quintero-Rivera, Fabiola, Noh, Grace J, Lippa, Natalie, Alkelai, Anna, Aggarwal, Vimla, Agre, Katherine E, Gavrilova, Ralitza, Mirzaa, Ghayda M, Straussberg, Rachel, Cohen, Rony, Horist, Brooke, Krishnamurthy, Vidya, McWalter, Kirsty, Juusola, Jane, Davis-Keppen, Laura, Ohden, Lisa, van Slegtenhorst, Marjon, de Man, Stella A, Ekici, Arif B, Gregor, Anne, van de Laar, Ingrid, and Zweier, Christiane

Subjects
Biological Sciences, Bioinformatics and Computational Biology, Genetics, Brain Disorders, Clinical Research, Intellectual and Developmental Disabilities (IDD), Human Genome, Neurosciences, 2.1 Biological and endogenous factors, Aetiology, Animals, Child, Drosophila melanogaster, Female, Gene Knockdown Techniques, Genetic Variation, Heterozygote, Humans, Intellectual Disability, Locomotion, Male, Mutation, Neurodevelopmental Disorders, RNA Polymerase II, RNA Processing, Post-Transcriptional, RNA, Messenger, Seizures, Serine-Arginine Splicing Factors, Exome Sequencing, UCLA Clinical Genomics Center, SCAF4, epilepsy, intellectual disability, mRNA processing, neurodevelopmental disorder, seizures, Medical and Health Sciences, Genetics & Heredity, Biological sciences, Biomedical and clinical sciences, Health sciences
Abstract

RNA polymerase II interacts with various other complexes and factors to ensure correct initiation, elongation, and termination of mRNA transcription. One of these proteins is SR-related CTD-associated factor 4 (SCAF4), which is important for correct usage of polyA sites for mRNA termination. Using exome sequencing and international matchmaking, we identified nine likely pathogenic germline variants in SCAF4 including two splice-site and seven truncating variants, all residing in the N-terminal two thirds of the protein. Eight of these variants occurred de novo, and one was inherited. Affected individuals demonstrated a variable neurodevelopmental disorder characterized by mild intellectual disability, seizures, behavioral abnormalities, and various skeletal and structural anomalies. Paired-end RNA sequencing on blood lymphocytes of SCAF4-deficient individuals revealed a broad deregulation of more than 9,000 genes and significant differential splicing of more than 2,900 genes, indicating an important role of SCAF4 in mRNA processing. Knockdown of the SCAF4 ortholog CG4266 in the model organism Drosophila melanogaster resulted in impaired locomotor function, learning, and short-term memory. Furthermore, we observed an increased number of active zones in larval neuromuscular junctions, representing large glutamatergic synapses. These observations indicate a role of CG4266 in nervous system development and function and support the implication of SCAF4 in neurodevelopmental phenotypes. In summary, our data show that heterozygous, likely gene-disrupting variants in SCAF4 are causative for a variable neurodevelopmental disorder associated with impaired mRNA processing.

Published
2020

22. Pathogenic variants in USP7 cause a neurodevelopmental disorder with speech delays, altered behavior, and neurologic anomalies

Author

Fountain, Michael D, Oleson, David S, Rech, Megan E, Segebrecht, Lara, Hunter, Jill V, McCarthy, John M, Lupo, Philip J, Holtgrewe, Manuel, Moran, Rocio, Rosenfeld, Jill A, Isidor, Bertrand, Le Caignec, Cédric, Saenz, Margarita S, Pedersen, Robert C, Morgan, Thomas M, Pfotenhauer, Jean P, Xia, Fan, Bi, Weimin, Kang, Sung-Hae L, Patel, Ankita, Krantz, Ian D, Raible, Sarah E, Smith, Wendy, Cristian, Ingrid, Torti, Erin, Juusola, Jane, Millan, Francisca, Wentzensen, Ingrid M, Person, Richard E, Küry, Sébastien, Bézieau, Stéphane, Uguen, Kévin, Férec, Claude, Munnich, Arnold, van Haelst, Mieke, Lichtenbelt, Klaske D, van Gassen, Koen, Hagelstrom, Tanner, Chawla, Aditi, Perry, Denise L, Taft, Ryan J, Jones, Marilyn, Masser-Frye, Diane, Dyment, David, Venkateswaran, Sunita, Li, Chumei, Escobar, Luis F, Horn, Denise, Spillmann, Rebecca C, Peña, Loren, Wierzba, Jolanta, Strom, Tim M, Parenti, Ilaria, Kaiser, Frank J, Ehmke, Nadja, and Schaaf, Christian P

Subjects
Biological Sciences, Genetics, Brain Disorders, Neurosciences, Behavioral and Social Science, Clinical Research, Pediatric, Congenital Structural Anomalies, Intellectual and Developmental Disabilities (IDD), Mental Health, Autism, Aetiology, 2.1 Biological and endogenous factors, Mental health, Adolescent, Autism Spectrum Disorder, Child, Child, Preschool, Chromosome Deletion, DNA-Binding Proteins, Genome, Human, Haploinsufficiency, Humans, Infant, Infant, Newborn, Intellectual Disability, Language Development Disorders, Neurodevelopmental Disorders, Nuclear Proteins, Phenotype, Problem Behavior, Proteins, Exome Sequencing, USP7, neurodevelopment, speech delay, white matter paucity, corpus callosum thinning, Clinical Sciences, Genetics & Heredity
Abstract

PurposeHaploinsufficiency of USP7, located at chromosome 16p13.2, has recently been reported in seven individuals with neurodevelopmental phenotypes, including developmental delay/intellectual disability (DD/ID), autism spectrum disorder (ASD), seizures, and hypogonadism. Further, USP7 was identified to critically incorporate into the MAGEL2-USP7-TRIM27 (MUST), such that pathogenic variants in USP7 lead to altered endosomal F-actin polymerization and dysregulated protein recycling.MethodsWe report 16 newly identified individuals with heterozygous USP7 variants, identified by genome or exome sequencing or by chromosome microarray analysis. Clinical features were evaluated by review of medical records. Additional clinical information was obtained on the seven previously reported individuals to fully elucidate the phenotypic expression associated with USP7 haploinsufficiency.ResultsThe clinical manifestations of these 23 individuals suggest a syndrome characterized by DD/ID, hypotonia, eye anomalies,feeding difficulties, GERD, behavioral anomalies, and ASD, and more specific phenotypes of speech delays including a nonverbal phenotype and abnormal brain magnetic resonance image findings including white matter changes based on neuroradiologic examination.ConclusionThe consistency of clinical features among all individuals presented regardless of de novo USP7 variant type supports haploinsufficiency as a mechanism for pathogenesis and refines the clinical impact faced by affected individuals and caregivers.

Published
2019

24. The utility of obesity polygenic risk scores from research to clinical practice: A review.

Author

Jansen, Philip R., Vos, Niels, van Uhm, Jorrit, Dekkers, Ilona A., van der Meer, Rieneke, Mannens, Marcel M. A. M., and van Haelst, Mieke M.

Subjects
GENETIC risk score, OBESITY genetics, HEALTH equity, CLINICAL medicine, MEDICAL research
Abstract

Summary: Obesity represents a major public health emergency worldwide, and its etiology is shaped by a complex interplay of environmental and genetic factors. Over the last decade, polygenic risk scores (PRS) have emerged as a promising tool to quantify an individual's genetic risk of obesity. The field of PRS in obesity genetics is rapidly evolving, shedding new lights on obesity mechanisms and holding promise for contributing to personalized prevention and treatment. Challenges persist in terms of its clinical integration, including the need for further validation in large‐scale prospective cohorts, ethical considerations, and implications for health disparities. In this review, we provide a comprehensive overview of PRS for studying the genetics of obesity, spanning from methodological nuances to clinical applications and challenges. We summarize the latest developments in the generation and refinement of PRS for obesity, including advances in methodologies for aggregating genome‐wide association study data and improving PRS predictive accuracy, and discuss limitations that need to be overcome to fully realize its potential benefits of PRS in both medicine and public health. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Establishing the phenotypic spectrum of ZTTK syndrome by analysis of 52 individuals with variants in SON

Author

Dingemans, Alexander J. M., Truijen, Kim M. G., Kim, Jung-Hyun, Alaçam, Zahide, Faivre, Laurence, Collins, Kathleen M., Gerkes, Erica H., van Haelst, Mieke, van de Laar, Ingrid M. B. H., Lindstrom, Kristin, Nizon, Mathilde, Pauling, James, Heropolitańska-Pliszka, Edyta, Plomp, Astrid S., Racine, Caroline, Sachdev, Rani, Sinnema, Margje, Skranes, Jon, Veenstra-Knol, Hermine E., Verberne, Eline A., Vulto-van Silfhout, Anneke T., Wilsterman, Marlon E. F., Ahn, Eun-Young Erin, de Vries, Bert B. A., and Vissers, Lisenka E. L. M.

Published
2022
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27. Clinical phenotypes of adults with monogenic and syndromic genetic obesity

Author

Welling, Mila S., primary, Mohseni, Mostafa, additional, Meeusen, Renate E. H., additional, de Groot, Cornelis J., additional, Boon, Mariëtte R., additional, Kleinendorst, Lotte, additional, Visser, Jenny A., additional, van Haelst, Mieke M., additional, van den Akker, Erica L. T., additional, and van Rossum, Elisabeth F. C., additional

Published
2024
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28. Clinical epigenomics: genome-wide DNA methylation analysis for the diagnosis of Mendelian disorders

Author

Sadikovic, Bekim, Levy, Michael A., Kerkhof, Jennifer, Aref-Eshghi, Erfan, Schenkel, Laila, Stuart, Alan, McConkey, Haley, Henneman, Peter, Venema, Andrea, Schwartz, Charles E., Stevenson, Roger E., Skinner, Steven A., DuPont, Barbara R., Fletcher, Robin S., Balci, Tugce B., Siu, Victoria Mok, Granadillo, Jorge L., Masters, Jennefer, Kadour, Mike, Friez, Michael J., van Haelst, Mieke M., Mannens, Marcel M.A.M., Louie, Raymond J., Lee, Jennifer A., Tedder, Matthew L., and Alders, Marielle

Published
2021
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29. DLG4-related synaptopathy: a new rare brain disorder

Author

Rodríguez-Palmero, Agustí, Boerrigter, Melissa Maria, Gómez-Andrés, David, Aldinger, Kimberly A., Marcos-Alcalde, Íñigo, Popp, Bernt, Everman, David B., Lovgren, Alysia Kern, Arpin, Stephanie, Bahrambeigi, Vahid, Beunders, Gea, Bisgaard, Anne-Marie, Bjerregaard, V.A., Bruel, Ange-Line, Challman, Thomas D., Cogné, Benjamin, Coubes, Christine, de Man, Stella A., Denommé-Pichon, Anne-Sophie, Dye, Thomas J., Elmslie, Frances, Feuk, Lars, García-Miñaúr, Sixto, Gertler, Tracy, Giorgio, Elisa, Gruchy, Nicolas, Haack, Tobias B., Haldeman-Englert, Chad R., Haukanes, Bjørn Ivar, Hoyer, Juliane, Hurst, Anna C.E., Isidor, Bertrand, Soller, Maria Johansson, Kushary, Sulagna, Kvarnung, Malin, Landau, Yuval E., Leppig, Kathleen A., Lindstrand, Anna, Kleinendorst, Lotte, MacKenzie, Alex, Mandrile, Giorgia, Mendelsohn, Bryce A., Moghadasi, Setareh, Morton, Jenny E., Moutton, Sebastien, Müller, Amelie J., O’Leary, Melanie, Pacio-Míguez, Marta, Palomares-Bralo, Maria, Parikh, Sumit, Pfundt, Rolph, Pode-Shakked, Ben, Rauch, Anita, Repnikova, Elena, Revah-Politi, Anya, Ross, Meredith J., Ruivenkamp, Claudia A.L., Sarrazin, Elisabeth, Savatt, Juliann M., Schlüter, Agatha, Schönewolf-Greulich, Bitten, Shad, Zohra, Shaw-Smith, Charles, Shieh, Joseph T., Shohat, Motti, Spranger, Stephanie, Thiese, Heidi, Mau-Them, Frederic Tran, van Bon, Bregje, van de Burgt, Ineke, van de Laar, Ingrid M.B.H., van Drie, Esmée, van Haelst, Mieke M., van Ravenswaaij-Arts, Conny M., Verdura, Edgard, Vitobello, Antonio, Waldmüller, Stephan, Whiting, Sharon, Zweier, Christiane, Prada, Carlos E., de Vries, Bert B.A., Dobyns, William B., Reiter, Simone F., Gómez-Puertas, Paulino, Pujol, Aurora, and Tümer, Zeynep

Published
2021
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31. JARID2 haploinsufficiency is associated with a clinically distinct neurodevelopmental syndrome

Author

Verberne, Eline A., Goh, Shuxiang, England, Jade, van Ginkel, Manon, Rafael-Croes, Louise, Maas, Saskia, Polstra, Abeltje, Zarate, Yuri A., Bosanko, Katherine A., Pechter, Kieran B., Bedoukian, Emma, Izumi, Kosuke, Chaudhry, Ayeshah, Robin, Nathaniel H., Boothe, Megan, Lippa, Natalie C., Aggarwal, Vimla, De Vivo, Darryl C., Lehman, Anna, Study, Causes, Stockler, Sylvia, Bruel, Ange-Line, Isidor, Bertrand, Lemons, Jennifer, Rodriguez-Buritica, David F., Richmond, Christopher M., Stark, Zornitza, Agrawal, Pankaj B., Kooy, R.Frank, Meuwissen, Marije E.C., Koolen, David A., Pfundt, Rolf, Lieden, Agne, Anderlid, Britt-Marie, Glatz, Dagmar, Mannens, Marcel M.A.M., Bakshi, Madhura, Mallette, Frédérick A., van Haelst, Mieke M., and Campeau, Philippe M.

Published
2021
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36. DNA methylation episignature and comparative epigenomic profiling for Pitt-Hopkins syndrome caused by TCF4 variants

Author

van der Laan, Liselot, primary, Lauffer, Peter, additional, Rooney, Kathleen, additional, Silva, Ananília, additional, Haghshenas, Sadegheh, additional, Relator, Raissa, additional, Levy, Michael A., additional, Trajkova, Slavica, additional, Huisman, Sylvia A., additional, Bijlsma, Emilia K., additional, Kleefstra, Tjitske, additional, van Bon, Bregje W., additional, Baysal, Özlem, additional, Zweier, Christiane, additional, Palomares-Bralo, María, additional, Fischer, Jan, additional, Szakszon, Katalin, additional, Faivre, Laurence, additional, Piton, Amélie, additional, Mesman, Simone, additional, Hochstenbach, Ron, additional, Elting, Mariet W., additional, van Hagen, Johanna M., additional, Plomp, Astrid S., additional, Mannens, Marcel M.A.M., additional, Alders, Mariëlle, additional, van Haelst, Mieke M., additional, Ferrero, Giovanni B., additional, Brusco, Alfredo, additional, Henneman, Peter, additional, Sweetser, David A., additional, Sadikovic, Bekim, additional, Vitobello, Antonio, additional, and Menke, Leonie A., additional

Published
2024
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37. De Novo Mutations of RERE Cause a Genetic Syndrome with Features that Overlap Those Associated with Proximal 1p36 Deletions

Author

Fregeau, Brieana, Kim, Bum Jun, Hernández-García, Andrés, Jordan, Valerie K, Cho, Megan T, Schnur, Rhonda E, Monaghan, Kristin G, Juusola, Jane, Rosenfeld, Jill A, Bhoj, Elizabeth, Zackai, Elaine H, Sacharow, Stephanie, Barañano, Kristin, Bosch, Daniëlle GM, de Vries, Bert BA, Lindstrom, Kristin, Schroeder, Audrey, James, Philip, Kulch, Peggy, Lalani, Seema R, van Haelst, Mieke M, van Gassen, Koen LI, van Binsbergen, Ellen, Barkovich, A James, Scott, Daryl A, and Sherr, Elliott H

Subjects
Biological Sciences, Biomedical and Clinical Sciences, Genetics, Neurosciences, Brain Disorders, Autism, Pediatric, Mental Health, Intellectual and Developmental Disabilities (IDD), Congenital Structural Anomalies, Aetiology, 2.1 Biological and endogenous factors, Congenital, Abnormalities, Multiple, Animals, Carrier Proteins, Child, Child, Preschool, Chromosome Deletion, Chromosome Disorders, Chromosomes, Human, Pair 1, Developmental Disabilities, Female, Haploinsufficiency, Humans, Infant, Male, Mice, Mutation, Phenotype, Prognosis, Medical and Health Sciences, Genetics & Heredity, Biological sciences, Biomedical and clinical sciences, Health sciences
Abstract

Deletions of chromosome 1p36 affect approximately 1 in 5,000 newborns and are associated with developmental delay, intellectual disability, and defects involving the brain, eye, ear, heart, and kidney. Arginine-glutamic acid dipeptide repeats (RERE) is located in the proximal 1p36 critical region. RERE is a widely-expressed nuclear receptor coregulator that positively regulates retinoic acid signaling. Animal models suggest that RERE deficiency might contribute to many of the structural and developmental birth defects and medical problems seen in individuals with 1p36 deletion syndrome, although human evidence supporting this role has been lacking. In this report, we describe ten individuals with intellectual disability, developmental delay, and/or autism spectrum disorder who carry rare and putatively damaging changes in RERE. In all cases in which both parental DNA samples were available, these changes were found to be de novo. Associated features that were recurrently seen in these individuals included hypotonia, seizures, behavioral problems, structural CNS anomalies, ophthalmologic anomalies, congenital heart defects, and genitourinary abnormalities. The spectrum of defects documented in these individuals is similar to that of a cohort of 31 individuals with isolated 1p36 deletions that include RERE and are recapitulated in RERE-deficient zebrafish and mice. Taken together, our findings suggest that mutations in RERE cause a genetic syndrome and that haploinsufficiency of RERE might be sufficient to cause many of the phenotypes associated with proximal 1p36 deletions.

Published
2016

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

Author

D’Angelo, Debra, Lebon, Sébastien, Chen, Qixuan, Martin-Brevet, Sandra, Snyder, LeeAnne Green, Hippolyte, Loyse, Hanson, Ellen, Maillard, Anne M, Faucett, W Andrew, Macé, Aurélien, Pain, Aurélie, Bernier, Raphael, Chawner, Samuel JRA, David, Albert, Andrieux, Joris, Aylward, Elizabeth, Baujat, Genevieve, Caldeira, Ines, Conus, Philippe, Ferrari, Carrina, Forzano, Francesca, Gérard, Marion, Goin-Kochel, Robin P, Grant, Ellen, Hunter, Jill V, Isidor, Bertrand, Jacquette, Aurélia, Jønch, Aia E, Keren, Boris, Lacombe, Didier, Le Caignec, Cédric, Martin, Christa Lese, Männik, Katrin, Metspalu, Andres, Mignot, Cyril, Mukherjee, Pratik, Owen, Michael J, Passeggeri, Marzia, Rooryck-Thambo, Caroline, Rosenfeld, Jill A, Spence, Sarah J, Steinman, Kyle J, Tjernagel, Jennifer, Van Haelst, Mieke, Shen, Yiping, Draganski, Bogdan, Sherr, Elliott H, Ledbetter, David H, van den Bree, Marianne BM, Beckmann, Jacques S, Spiro, John E, Reymond, Alexandre, Jacquemont, Sébastien, and Chung, Wendy K

Subjects
Biological Psychology, Psychology, Intellectual and Developmental Disabilities (IDD), Behavioral and Social Science, Mental Health, Pediatric, Clinical Research, Brain Disorders, Autism, Aetiology, 2.1 Biological and endogenous factors, Mental health, Adolescent, Adult, Autism Spectrum Disorder, Autistic Disorder, Case-Control Studies, Cerebellum, Child, Child, Preschool, Chromosome Deletion, Chromosome Disorders, Chromosome Duplication, Chromosomes, Human, Pair 16, Cognition, Cohort Studies, Comorbidity, DNA Copy Number Variations, Developmental Disabilities, Epilepsy, Female, Humans, Intellectual Disability, Male, Microcephaly, Middle Aged, Nervous System Malformations, Schizophrenia, Schizophrenic Psychology, Young Adult, Cardiff University Experiences of Children With Copy Number Variants (ECHO) Study, 16p11.2 European Consortium, Simons Variation in Individuals Project (VIP) Consortium, Other Medical and Health Sciences, Cognitive Sciences, Clinical sciences, Clinical and health psychology
Abstract

ImportanceThe 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).ObjectivesTo 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 participantsThis 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 measuresFindings 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.ResultsAmong 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 100) compared with the deletion group (P

Published
2016

39. The detection of a strong episignature for Chung-Jansen syndrome, partially overlapping with Börjeson-Forssman-Lehmann and White-Kernohan syndromes

Author

Genetica Klinische Genetica, Cancer, Child Health, Vos, Niels, Haghshenas, Sadegheh, van der Laan, Liselot, Russel, Perle K M, Rooney, Kathleen, Levy, Michael A, Relator, Raissa, Kerkhof, Jennifer, McConkey, Haley, Maas, Saskia M, Vissers, Lisenka E L M, de Vries, Bert B A, Pfundt, Rolph, Elting, Mariet W, van Hagen, Johanna M, Verbeek, Nienke E, Jongmans, Marjolijn C J, Lakeman, Phillis, Rumping, Lynne, Bosch, Danielle G M, Vitobello, Antonio, Thauvin-Robinet, Christel, Faivre, Laurence, Nambot, Sophie, Garde, Aurore, Willems, Marjolaine, Genevieve, David, Nicolas, Gaël, Busa, Tiffany, Toutain, Annick, Gérard, Marion, Bizaoui, Varoona, Isidor, Bertrand, Merla, Giuseppe, Accadia, Maria, Schwartz, Charles E, Ounap, Katrin, Hoffer, Mariëtte J V, Nezarati, Marjan M, van den Boogaard, Marie-José H, Tedder, Matthew L, Rogers, Curtis, Brusco, Alfredo, Ferrero, Giovanni B, Spodenkiewicz, Marta, Sidlow, Richard, Mussa, Alessandro, Trajkova, Slavica, McCann, Emma, Mroczkowski, Henry J, Jansen, Sandra, Donker-Kaat, Laura, Duijkers, Floor A M, Stuurman, Kyra E, Mannens, Marcel M A M, Alders, Mariëlle, Henneman, Peter, White, Susan M, Sadikovic, Bekim, van Haelst, Mieke M, Genetica Klinische Genetica, Cancer, Child Health, Vos, Niels, Haghshenas, Sadegheh, van der Laan, Liselot, Russel, Perle K M, Rooney, Kathleen, Levy, Michael A, Relator, Raissa, Kerkhof, Jennifer, McConkey, Haley, Maas, Saskia M, Vissers, Lisenka E L M, de Vries, Bert B A, Pfundt, Rolph, Elting, Mariet W, van Hagen, Johanna M, Verbeek, Nienke E, Jongmans, Marjolijn C J, Lakeman, Phillis, Rumping, Lynne, Bosch, Danielle G M, Vitobello, Antonio, Thauvin-Robinet, Christel, Faivre, Laurence, Nambot, Sophie, Garde, Aurore, Willems, Marjolaine, Genevieve, David, Nicolas, Gaël, Busa, Tiffany, Toutain, Annick, Gérard, Marion, Bizaoui, Varoona, Isidor, Bertrand, Merla, Giuseppe, Accadia, Maria, Schwartz, Charles E, Ounap, Katrin, Hoffer, Mariëtte J V, Nezarati, Marjan M, van den Boogaard, Marie-José H, Tedder, Matthew L, Rogers, Curtis, Brusco, Alfredo, Ferrero, Giovanni B, Spodenkiewicz, Marta, Sidlow, Richard, Mussa, Alessandro, Trajkova, Slavica, McCann, Emma, Mroczkowski, Henry J, Jansen, Sandra, Donker-Kaat, Laura, Duijkers, Floor A M, Stuurman, Kyra E, Mannens, Marcel M A M, Alders, Mariëlle, Henneman, Peter, White, Susan M, Sadikovic, Bekim, and van Haelst, Mieke M

Published
2024

40. Novel loss-of-function variants expand ABCC9-related intellectual disability and myopathy syndrome

Author

Genetica Sectie Research, Cancer, Child Health, Efthymiou, Stephanie, Scala, Marcello, Nagaraj, Vini, Ochenkowska, Katarzyna, Komdeur, Fenne L., Liang, Robin A., Abdel-Hamid, Mohamed S., Sultan, Tipu, Barøy, Tuva, Van Ghelue, Marijke, Vona, Barbara, Maroofian, Reza, Zafar, Faisal, Alkuraya, Fowzan S., Zaki, Maha S., Severino, Mariasavina, Duru, Kingsley C., Tryon, Robert C., Brauteset, Lin Vigdis, Ansari, Morad, Hamilton, Mark, Van Haelst, Mieke M., Van Haaften, Gijs, Zara, Federico, Houlden, Henry, Samarut, Éric, Nichols, Colin G., Smeland, Marie F., McClenaghan, Conor, Genetica Sectie Research, Cancer, Child Health, Efthymiou, Stephanie, Scala, Marcello, Nagaraj, Vini, Ochenkowska, Katarzyna, Komdeur, Fenne L., Liang, Robin A., Abdel-Hamid, Mohamed S., Sultan, Tipu, Barøy, Tuva, Van Ghelue, Marijke, Vona, Barbara, Maroofian, Reza, Zafar, Faisal, Alkuraya, Fowzan S., Zaki, Maha S., Severino, Mariasavina, Duru, Kingsley C., Tryon, Robert C., Brauteset, Lin Vigdis, Ansari, Morad, Hamilton, Mark, Van Haelst, Mieke M., Van Haaften, Gijs, Zara, Federico, Houlden, Henry, Samarut, Éric, Nichols, Colin G., Smeland, Marie F., and McClenaghan, Conor

Published
2024

41. Clinical phenotypes of adults with monogenic and syndromic genetic obesity

Author

Welling, Mila S., Mohseni, Mostafa, Meeusen, Renate E.H., de Groot, Cornelis J., Boon, Mariëtte R., Kleinendorst, Lotte, Visser, Jenny A., van Haelst, Mieke M., van den Akker, Erica L.T., van Rossum, Elisabeth F.C., Welling, Mila S., Mohseni, Mostafa, Meeusen, Renate E.H., de Groot, Cornelis J., Boon, Mariëtte R., Kleinendorst, Lotte, Visser, Jenny A., van Haelst, Mieke M., van den Akker, Erica L.T., and van Rossum, Elisabeth F.C.

Abstract

Objective: Considering limited evidence on diagnostics of genetic obesity in adults, we evaluated phenotypes of adults with genetic obesity. Additionally, we assessed the applicability of Endocrine Society (ES) recommendations for genetic testing in pediatric obesity. Methods: We compared clinical features, including age of onset of obesity and appetite, between adults with non-syndromic monogenic obesity (MO), adults with syndromic obesity (SO), and adults with common obesity (CO) as control patients. Results: A total of 79 adults with genetic obesity (32 with MO, 47 with SO) were compared with 186 control patients with CO. Median BMI was similar among the groups: 41.2, 39.5, and 38.7 kg/m2 for patients with MO, SO, and CO, respectively. Median age of onset of obesity was 3 (IQR: 1–6) years in patients with MO, 9 (IQR: 4–13) years in patients with SO, and 21 (IQR: 13–33) years in patients with CO (p < 0.001). Patients with genetic obesity more often reported increased appetite: 65.6%, 68.1%, and 33.9% in patients with MO, SO, and CO, respectively (p < 0.001). Intellectual deficit and autism spectrum disorder were more prevalent in patients with SO (53.2% and 21.3%) compared with those with MO (3.1% and 6.3%) and CO (both 0.0%). The ES recommendations were fulfilled in 56.3%, 29.8%, and 2.7% of patients with MO, SO, and CO, respectively (p < 0.001). Conclusions: We found distinct phenotypes in adult genetic obesity. Additionally, we demonstrated low sensitivity for detecting genetic obesity in adults using pediatric ES recommendations, necessitating specific genetic testing recommendations in adult obesity care.

Published
2024

42. GNB1 and obesity:Evidence for a correlation between haploinsufficiency and syndromic obesity

Author

Kleinendorst, Lotte, Abawi, Ozair, Vos, Niels, van der Valk, Eline S., Maas, Saskia M., Morgan, Angela T., Hildebrand, Michael S., Da Silva, Jorge D., Florijn, Ralph J., Lauffer, Peter, Visser, Jenny A., van Rossum, Elisabeth F.C., van den Akker, Erica L.T., van Haelst, Mieke M., Kleinendorst, Lotte, Abawi, Ozair, Vos, Niels, van der Valk, Eline S., Maas, Saskia M., Morgan, Angela T., Hildebrand, Michael S., Da Silva, Jorge D., Florijn, Ralph J., Lauffer, Peter, Visser, Jenny A., van Rossum, Elisabeth F.C., van den Akker, Erica L.T., and van Haelst, Mieke M.

Abstract

Most patients with GNB1 encephalopathy have developmental delay and/or intellectual disability, brain anomalies and seizures. Recently, two cases with GNB1 encephalopathy caused by haploinsufficiency have been reported that also show a Prader–Willi-like phenotype of childhood hypotonia and severe obesity. Here we present three new cases from our expert centre for genetic obesity in which GNB1 truncating and splice variants, probably leading to haploinsufficiency, were identified. They all have obesity, hyperphagia and intellectual deficit. The clinical cases and their weight courses are presented, together with a review of all 68 published cases with GNB1 encephalopathy. Information on weight was not mentioned in most of these articles, so we contacted authors for additional clinical information on weight status and hyperphagia. Of the 42 patients whose weight status we could determine, obesity was present in 8 patients (19%). Obesity is significantly over-represented in the group with truncating and splicing variants. In this group, we see an obesity prevalence of 75%. Since GNB1 has been linked to several key genes in the hypothalamic leptin-melanocortin pathway, which regulates satiety and energy expenditure, our data support the potential association between GNB1 haploinsufficiency and genetic obesity. We also suggest GNB1 is a candidate gene for the known obesity phenotype of the 1p36 microdeletion syndrome given this chromosomal region includes the GNB1 gene. Knowledge of an additional obesity phenotype is important for prognosis, early interventions against obesity and awareness when prescribing weight-inducing medication.

Published
2024

43. Evaluation of 100 Dutch cases with 16p11.2 deletion and duplication syndromes:from clinical manifestations towards personalized treatment options

Author

Vos, Niels, Kleinendorst, Lotte, van der Laan, Liselot, van Uhm, Jorrit, Jansen, Philip R, van Eeghen, Agnies M, Maas, Saskia M, Mannens, Marcel M A M, van Haelst, Mieke M, Vos, Niels, Kleinendorst, Lotte, van der Laan, Liselot, van Uhm, Jorrit, Jansen, Philip R, van Eeghen, Agnies M, Maas, Saskia M, Mannens, Marcel M A M, and van Haelst, Mieke M

Abstract

The 16p11.2 deletion syndrome is a clinically heterogeneous disorder, characterized by developmental delay, intellectual disability, hyperphagia, obesity, macrocephaly and psychiatric problems. Cases with 16p11.2 duplication syndrome have similar neurodevelopmental problems, but typically show a partial 'mirror phenotype' with underweight and microcephaly. Various copy number variants (CNVs) of the chromosomal 16p11.2 region have been described. Most is known about the 'typical' 16p11.2 BP4-BP5 (29.6-30.2 Mb; ~600 kb) deletions and duplications, but there are also several published cohorts with more distal 16p11.2 BP2-BP3 CNVs (28.8-29.0 Mb; ~220 kb), who exhibit clinical overlap. We assessed 100 cases with various pathogenic 16p11.2 CNVs and compared their clinical characteristics to provide more clear genotype-phenotype correlations and raise awareness of the different 16p11.2 CNVs. Neurodevelopmental and weight issues were reported in the majority of cases. Cases with distal 16p11.2 BP2-BP3 deletion showed the most severe obesity phenotype (73.7% obesity, mean BMI SDS 3.2). In addition to the more well defined typical 16p11.2 BP4-BP5 and distal 16p11.2 BP2-BP3 CNVs, we describe the clinical features of five cases with other, overlapping, 16p11.2 CNVs in more detail. Interestingly, four cases had a second genetic diagnosis and 18 cases an additional gene variant of uncertain significance, that could potentially help explain the cases' phenotypes. In conclusion, we provide an overview of our Dutch cohort of cases with various pathogenic 16p11.2 CNVs and relevant second genetic findings, that can aid in adequately recognizing, diagnosing and counseling of individuals with 16p11.2 CNVs, and describe the personalized medicine for cases with these conditions.

Published
2024

44. Dementia in Rare Genetic Neurodevelopmental Disorders:A Systematic Literature Review

Author

Kwetsie, Hadassa, van Schaijk, Malu, Van Der Lee, Sven, Maes-Festen, Dederieke, Ten Hoopen, Leontine W., van Haelst, Mieke M., Coesmans, Michael, Van Den Berg, Esther, De Wit, Marie Claire Y., Pijnenburg, Yolande, Aronica, Eleonora, Boot, Erik, Van Eeghen, Agnies M., Kwetsie, Hadassa, van Schaijk, Malu, Van Der Lee, Sven, Maes-Festen, Dederieke, Ten Hoopen, Leontine W., van Haelst, Mieke M., Coesmans, Michael, Van Den Berg, Esther, De Wit, Marie Claire Y., Pijnenburg, Yolande, Aronica, Eleonora, Boot, Erik, and Van Eeghen, Agnies M.

Abstract

BACKGROUND AND OBJECTIVES: Knowledge of young-onset Alzheimer disease in adults with Down syndrome has greatly improved clinical care. However, little is known about dementia in rare genetic neurodevelopmental disorders (RGNDs). In this review, a comprehensive overview is provided of reports on dementia and cognitive/adaptive trajectories in adults with RGNDs. METHODS: A systematic literature review was conducted in Embase, Medline ALL, and PsycINFO on December 6, 2022. The protocol was registered in PROSPERO (CRD42021223041). Search terms for dementia, cognitive and adaptive functioning, and RGNDs were combined using generic terms and the Orphanet database. Study characteristics and descriptive data on genetic diagnosis, clinical and neuropathologic features, comorbidities, and diagnostic methods were extracted using a modified version of the Cochrane Data Extraction Template. RESULTS: The literature search yielded 40 publications (17 cohorts, 23 case studies) describing dementia and/or cognitive or adaptive trajectories in adults with 14 different RGNDs. Dementia was reported in 49 individuals (5 cohorts, 20 cases) with a mean age at onset of 44.4 years. Diagnostics were not disclosed for half of the reported individuals (n = 25/49, 51.0%). A total of 44 different psychodiagnostic instruments were used. MRI was the most reported additional investigation (n = 12/49, 24.5%). Comorbid disorders most frequently associated with cognitive/adaptive decline were epilepsy, psychotic disorders, and movement disorders. DISCUSSION: Currently available literature shows limited information on aging in RGNDs, with relatively many reports of young-onset dementia. Longitudinal data may provide insights into converging neurodevelopmental degenerative pathways. We provide recommendations to optimize dementia screening, diagnosis, and research.

Published
2024

45. Treatment with liraglutide or naltrexone-bupropion in patients with genetic obesity:a real-world study

Author

Welling, Mila S., de Groot, Cornelis J., Mohseni, Mostafa, Meeusen, Renate E.H., Boon, Mariëtte R., van Haelst, Mieke M., van den Akker, Erica L.T., van Rossum, Elisabeth F.C., Welling, Mila S., de Groot, Cornelis J., Mohseni, Mostafa, Meeusen, Renate E.H., Boon, Mariëtte R., van Haelst, Mieke M., van den Akker, Erica L.T., and van Rossum, Elisabeth F.C.

Abstract

Background: Rare genetic obesity commonly features early-onset obesity, hyperphagia, and therapy-resistance to lifestyle interventions. Pharmacotherapy is often required to treat hyperphagia and induce weight loss. We describe clinical outcomes of glucagon-like peptide-1 analogue liraglutide or naltrexone-bupropion treatment in adults with molecularly confirmed genetic obesity (MCGO) or highly suspected for genetic obesity without definite diagnosis (HSGO). Methods: We conducted a real-world cohort study at the Obesity Center CGG at Erasmus University Center, Rotterdam, Netherlands, between March 19, 2019, and August 14, 2023. All patients with MCGO and HSGO who were treated with either liraglutide or naltrexone-bupropion were included. Liraglutide 3 mg and naltrexone-bupropion were administered according to the manufacturer's protocol. Treatment evaluation occurred short-term, after 12 weeks on maximum or highest-tolerated dose, preceded by the 4–5 week dose escalation phase. Differences in anthropometrics, body composition, metabolic markers, self-reported appetite, eating behaviour, and quality of life (QoL) were evaluated. Findings: Ninety-eight adults were included in the analysis: 23 patients with MCGO and 75 patients with HSGO, with median BMI of 42.0 kg/m2 (IQR 38.7–48.2) and 43.7 kg/m2 (IQR 38.0–48.7), respectively. After liraglutide treatment, median weight at evaluation significantly decreased compared to baseline in both groups: −4.7% (IQR −6.0 to −1.5) in patients with MCGO and −5.2% (IQR −8.1 to −3.5) in patients with HSGO. Additionally, improvements were observed in appetite, fat mass, fasting glucose, and HbA1c in both patients with MCGO and with HSGO. Patients with HSGO also reported significant improvements in several domains of QoL and eating behaviour. In patients with MCGO and HSGO treated with naltrexone-bupropion, mean weight at evaluation significantly differed f

Published
2024

46. The utility of obesity polygenic risk scores from research to clinical practice: A review

Author

Jansen, Philip R, Vos, Niels, van Uhm, Jorrit, Dekkers, Ilona A, van der Meer, Rieneke, Mannens, Marcel M A M, van Haelst, Mieke M, Jansen, Philip R, Vos, Niels, van Uhm, Jorrit, Dekkers, Ilona A, van der Meer, Rieneke, Mannens, Marcel M A M, and van Haelst, Mieke M

Abstract

Obesity represents a major public health emergency worldwide, and its etiology is shaped by a complex interplay of environmental and genetic factors. Over the last decade, polygenic risk scores (PRS) have emerged as a promising tool to quantify an individual's genetic risk of obesity. The field of PRS in obesity genetics is rapidly evolving, shedding new lights on obesity mechanisms and holding promise for contributing to personalized prevention and treatment. Challenges persist in terms of its clinical integration, including the need for further validation in large-scale prospective cohorts, ethical considerations, and implications for health disparities. In this review, we provide a comprehensive overview of PRS for studying the genetics of obesity, spanning from methodological nuances to clinical applications and challenges. We summarize the latest developments in the generation and refinement of PRS for obesity, including advances in methodologies for aggregating genome-wide association study data and improving PRS predictive accuracy, and discuss limitations that need to be overcome to fully realize its potential benefits of PRS in both medicine and public health.

Published
2024

47. Reduced MUNC18-1 Levels, Synaptic Proteome Changes, and Altered Network Activity in STXBP1-Related Disorder Patient Neurons

Author

Metabole ziekten patientenzorg, Child Health, Infection & Immunity, Genetica Klinische Genetica, van Berkel, Annemiek Arienne, Lammertse, Hanna Charlotte Andrea, Öttl, Miriam, Koopmans, Frank, Misra-Isrie, Mala, Meijer, Marieke, Dilena, Robertino, van Hasselt, Peter Marin, Engelen, Marc, van Haelst, Mieke, Smit, August Benjamin, van der Sluis, Sophie, Toonen, Ruud Franciscus, Verhage, Matthijs, Metabole ziekten patientenzorg, Child Health, Infection & Immunity, Genetica Klinische Genetica, van Berkel, Annemiek Arienne, Lammertse, Hanna Charlotte Andrea, Öttl, Miriam, Koopmans, Frank, Misra-Isrie, Mala, Meijer, Marieke, Dilena, Robertino, van Hasselt, Peter Marin, Engelen, Marc, van Haelst, Mieke, Smit, August Benjamin, van der Sluis, Sophie, Toonen, Ruud Franciscus, and Verhage, Matthijs

Published
2024

48. Developmental epileptic encephalopathy in DLG4-related synaptopathy

Author

Kassabian, Benedetta, Levy, Amanda M., Gardella, Elena, Aledo-Serrano, Angel, Ananth, Amitha L., Brea-Fernández, Alejandro J., Caumes, Roseline, Chatron, Nicolas, Dainelli, Alice, De Wachter, Matthias, Denommé-Pichon, Anne-Sophie, Dye, Thomas J., Fazzi, Elisa, Felt, Roxanne, Fernández-Jaén, Alberto, Fernández-Prieto, Montse, Gantz, Emily, Gasperowicz, Piotr, Gil-Nagel, Antonio, Gómez-Andrés, David, Greiner, Hansel M., Guerrini, Renzo, Haanpää, Maria K., Helin, Minttu, Hoyer, Juliane, Hurst, Anna C. E., Kallish, Staci, Karkare, Shefali N., Khan, Amjad, Kleinendorst, Lotte, Koch, Johannes, Kothare, Sanjeev V., Koudijs, Suzanna M., Lagae, Lieven, Lakeman, Phillis, Leppig, Kathleen A., Lesca, Gaetan, Lopergolo, Diego, Lusk, Laina, Mackenzie, Alex, Mei, Davide, Møller, Rikke S., Pereira, Elaine M., Platzer, Konrad, Quelin, Chloe, Revah-Politi, Anya, Rheims, Sylvain, Rodríguez-Palmero, Agustí, Rossi, Andrea, Santorelli, Filippo, Seinfeld, Syndi, Sell, Erick, Stephenson, Donna, Szczaluba, Krzysztof, Trinka, Eugen, Umair, Muhammad, Van Esch, Hilde, van Haelst, Mieke M., Veenma, Danielle C. M., Weber, Sacha, Weckhuysen, Sarah, Zacher, Pia, Tümer, Zeynep, Rubboli, Guido, Kassabian, Benedetta, Levy, Amanda M., Gardella, Elena, Aledo-Serrano, Angel, Ananth, Amitha L., Brea-Fernández, Alejandro J., Caumes, Roseline, Chatron, Nicolas, Dainelli, Alice, De Wachter, Matthias, Denommé-Pichon, Anne-Sophie, Dye, Thomas J., Fazzi, Elisa, Felt, Roxanne, Fernández-Jaén, Alberto, Fernández-Prieto, Montse, Gantz, Emily, Gasperowicz, Piotr, Gil-Nagel, Antonio, Gómez-Andrés, David, Greiner, Hansel M., Guerrini, Renzo, Haanpää, Maria K., Helin, Minttu, Hoyer, Juliane, Hurst, Anna C. E., Kallish, Staci, Karkare, Shefali N., Khan, Amjad, Kleinendorst, Lotte, Koch, Johannes, Kothare, Sanjeev V., Koudijs, Suzanna M., Lagae, Lieven, Lakeman, Phillis, Leppig, Kathleen A., Lesca, Gaetan, Lopergolo, Diego, Lusk, Laina, Mackenzie, Alex, Mei, Davide, Møller, Rikke S., Pereira, Elaine M., Platzer, Konrad, Quelin, Chloe, Revah-Politi, Anya, Rheims, Sylvain, Rodríguez-Palmero, Agustí, Rossi, Andrea, Santorelli, Filippo, Seinfeld, Syndi, Sell, Erick, Stephenson, Donna, Szczaluba, Krzysztof, Trinka, Eugen, Umair, Muhammad, Van Esch, Hilde, van Haelst, Mieke M., Veenma, Danielle C. M., Weber, Sacha, Weckhuysen, Sarah, Zacher, Pia, Tümer, Zeynep, and Rubboli, Guido

Abstract

Objective: The postsynaptic density protein of excitatory neurons PSD-95 is encoded by discs large MAGUK scaffold protein 4 (DLG4), de novo pathogenic variants of which lead to DLG4-related synaptopathy. The major clinical features are developmental delay, intellectual disability (ID), hypotonia, sleep disturbances, movement disorders, and epilepsy. Even though epilepsy is present in 50% of the individuals, it has not been investigated in detail. We describe here the phenotypic spectrum of epilepsy and associated comorbidities in patients with DLG4-related synaptopathy. Methods: We included 35 individuals with a DLG4 variant and epilepsy as part of a multicenter study. The DLG4 variants were detected by the referring laboratories. The degree of ID, hypotonia, developmental delay, and motor disturbances were evaluated by the referring clinician. Data on awake and sleep electroencephalography (EEG) and/or video-polygraphy and brain magnetic resonance imaging were collected. Antiseizure medication response was retrospectively assessed by the referring clinician. Results: A large variety of seizure types was reported, although focal seizures were the most common. Encephalopathy related to status epilepticus during slow-wave sleep (ESES)/developmental epileptic encephalopathy with spike–wave activation during sleep (DEE-SWAS) was diagnosed in >25% of the individuals. All but one individual presented with neurodevelopmental delay. Regression in verbal and/or motor domains was observed in all individuals who suffered from ESES/DEE-SWAS, as well as some who did not. We could not identify a clear genotype–phenotype relationship even between individuals with the same DLG4 variants. Significance: Our study shows that a subgroup of individuals with DLG4-related synaptopathy have DEE, and approximately one fourth of them have ESES/DEE-SWAS. Our study confirms DEE as part of the DLG4-related phenotypic spectrum. Occurrence of ESES/DEE-SWAS in DLG4-related synaptopathy requi

Published
2024

Catalog

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