Медицинская библиотека · medRxiv : the preprint server for health sciences · 2025

Pathogenic variants in the cohesin loader subunit MAU2 lead to a new Cornelia de Lange Syndrome subtype.

Parenti Ilaria, Hesters Alina, Gil-Salvador Marta, Duffy Laura, Kanber Deniz, Beygo Jasmin, Kerkhof Jennifer, Steenpaß Laura, Leitão Elsa, Woestefeld Julia, Boone Philip M, Kao Emeline M, Alabdi Lama, Aldhalaan Hesham M, Alkuraya Fowzan S, Alshammari Muneera J, Antonarakis Stylianos E, Basel Donald, Cassinari Kevin, de Polli Cellin Laurana, Clause Amanda R, de Lima Jorge Alexander Augusto, de Castro Leal Andréa, Collins Stephan C, Durand Benjamin, Eckhold Juliane, Hashem Mais O, Jayakar Parul, Khan Arif O, Kato Kohji, Kubica Regina, Lyon Gholson J, Marchi Elaine, McCarrier Julie, Kimmig Lara K, Mizuno Seiji, Nicolas Gael, Nishio Yosuke, Ogi Tomoo, Pié Juan, Prell Jordyn, Puisac Beatriz, Ramos Feliciano J, Ranza Emmanuelle, Redin Claire, Rush Eric, Saitoh Shinji, Shamseldin Hanan E, Starling Susan, Astiazaran-Symonds Esteban, Taher Sara, Kuechler Alma, Sadikovic Bekim, Yalcin Binnaz, Wendt Kerstin S, Kaiser Frank J

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Аннотация

The role of the cohesin complex depends on the cohesin loader proteins NIPBL and MAU2. While NIPBL variants are a major cause of Cornelia de Lange Syndrome (CdLS), the role of MAU2 in disease is unclear. We describe 18 individuals carrying 15 heterozygous MAU2 variants and demonstrate pathogenicity through functional analyses. MAU2 in-frame variants predominantly impair NIPBL-MAU2 interaction, whereas truncating variants cause MAU2 haploinsufficiency and lead to NIPBL reduction. Most patients exhibit a DNA methylation profile compatible with the CdLS episignature. We also identified two MAU2-specific episignatures that reflect variant-dependent molecular consequences. Affected individuals display a wide range of phenotypes, from classic CdLS to milder presentations, with short stature and microcephaly as consistent features. A heterozygous Mau2 knockout mouse model recapitulated these traits, confirming the causal role of MAU2 disruption in vivo. Our study establishes MAU2 as a new CdLS-associated gene and delineates a MAU2-related chromatinopathy with variable expressivity.

Для цитирования: Parenti Ilaria, Hesters Alina, Gil-Salvador Marta, Duffy Laura, Kanber Deniz, Beygo Jasmin, Kerkhof Jennifer, Steenpaß Laura, Leitão Elsa, Woestefeld Julia, Boone Philip M, Kao Emeline M, Alabdi Lama, Aldhalaan Hesham M, Alkuraya Fowzan S, Alshammari Muneera J, Antonarakis Stylianos E, Basel Donald, Cassinari Kevin, de Polli Cellin Laurana, Clause Amanda R, de Lima Jorge Alexander Augusto, de Castro Leal Andréa, Collins Stephan C, Durand Benjamin, Eckhold Juliane, Hashem Mais O, Jayakar Parul, Khan Arif O, Kato Kohji, Kubica Regina, Lyon Gholson J, Marchi Elaine, McCarrier Julie, Kimmig Lara K, Mizuno Seiji, Nicolas Gael, Nishio Yosuke, Ogi Tomoo, Pié Juan, Prell Jordyn, Puisac Beatriz, Ramos Feliciano J, Ranza Emmanuelle, Redin Claire, Rush Eric, Saitoh Shinji, Shamseldin Hanan E, Starling Susan, Astiazaran-Symonds Esteban, Taher Sara, Kuechler Alma, Sadikovic Bekim, Yalcin Binnaz, Wendt Kerstin S, Kaiser Frank J. Pathogenic variants in the cohesin loader subunit MAU2 lead to a new Cornelia de Lange Syndrome subtype.. medRxiv : the preprint server for health sciences. 2025. DOI: 10.1101/2025.11.16.25339042.

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