Browsing by Author "Kayserili, Hulya"

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A comprehensive molecular study on Coffin-Siris and Nicolaides-Baraitser syndromes identifies a broad molecular and clinical spectrum converging on altered chromatin remodeling
(OXFORD UNIV PRESS, 2013-01-01) Wieczorek, Dagmar; Boegershausen, Nina; Beleggia, Filippo; Steiner-Haldenstaett, Sabine; Pohl, Esther; Li, Yun; Milz, Esther; Martin, Marcel; Thiele, Holger; Altmueller, Janine; Alanay, Yasemin; Kayserili, Hulya; Klein-Hitpass, Ludger; Bohringer, Stefan; Wollstein, Andreas; Albrecht, Beate; Boduroglu, Koray; Caliebe, Almuth; Chrzanowska, Krystyna; Cogulu, Ozgur; Cristofoli, Francesca; Czeschik, Johanna Christina; Devriendt, Koenraad; Dotti, Maria Teresa; Elcioglu, Nursel; Gener, Blanca; Goecke, Timm O.; Krajewska-Walasek, Malgorzata; Guillen-Navarro, Encarnacion; Hayek, Joussef; Houge, Gunnar; Kilic, Esra; Simsek-Kiper, Pelin Ozlem; Lopez-Gonzalez, Vanesa; Kuechler, Alma; Lyonnet, Stanislas; Mari, Francesca; Marozza, Annabella; Dramard, Michele Mathieu; Mikat, Barbara; Morin, Gilles; Morice-Picard, Fanny; Ozkinay, Ferda; Rauch, Anita; Renieri, Alessandra; Tinschert, Sigrid; Utine, G. Eda; Vilain, Catheline; Vivarelli, Rossella; Zweier, Christiane; Nuernberg, Peter; Rahmann, Sven; Vermeesch, Joris; Luedecke, Hermann-Josef; Zeschnigk, Michael; Wollnik, Bernd
Chromatin remodeling complexes are known to modify chemical marks on histones or to induce conformational changes in the chromatin in order to regulate transcription. Denovodominant mutations in different members of the SWI/SNF chromatin remodeling complex have recently been described in individuals with Coffin-Siris (CSS) and Nicolaides-Baraitser (NCBRS) syndromes. Using a combination of whole-exome sequencing, NGS-based sequencing of 23 SWI/SNF complex genes, and molecular karyotyping in 46 previously undescribed individuals with CSS and NCBRS, we identified a de novo 1-bp deletion (c.677delG, p.Gly226Glufs{*}53) and a de novo missense mutation (c.914G>T, p.Cys305Phe) in PHF6 in two individuals diagnosed with CSS. PHF6 interacts with the nucleosome remodeling and deacetylation ( NuRD) complex implicating dysfunction of a second chromatin remodeling complex in the pathogenesis of CSS-like phenotypes. Altogether, we identified mutations in 60\% of the studied individuals (28/46), located in the genes ARID1A, ARID1B, SMARCB1, SMARCE1, SMARCA2, and PHF6. We show that mutations in ARID1B are the main cause of CSS, accounting for 76\% of identified mutations. ARID1B and SMARCB1 mutations were also found in individuals with the initial diagnosis of NCBRS. These individuals apparently belong to a small subset who display an intermediate CSS/NCBRS phenotype. Our proposed genotype-phenotype correlations are important for molecular screening strategies.
Biallelic loss of human CTNNA2, encoding alpha N-catenin, leads to ARP2/3 complex overactivity and disordered cortical neuronal migration
(NATURE PUBLISHING GROUP, 2018-01-01) Schaffer, Ashleigh E.; Breuss, Martin W.; Caglayan, Ahmet Okay; Al-Sanaa, Nouriya; Al-Abdulwahed, Hind Y.; Kaymakcalan, Hande; Yilmaz, Cahide; Zaki, Maha S.; Rosti, Rasim O.; Copeland, Brett; Baek, Seung Tae; Musaev, Damir; Scott, Eric C.; Ben-Omran, Tawfeg; Kariminejad, Ariana; Kayserili, Hulya; Mojahedi, Faezeh; Kara, Majdi; Cai, Na; Silhavy, Jennifer L.; Elsharif, Seham; Fenercioglu, Elif; Barshop, Bruce A.; Kara, Bulent; Wang, Rengang; Stanley, Valentina; James, Kiely N.; Nachnani, Rahul; Kalur, Aneesha; Megahed, Hisham; Incecik, Faruk; Danda, Sumita; Alanay, Yasemin; Faqeih, Eissa; Melikishvili, Gia; Mansour, Lobna; Miller, Ian; Sukhudyan, Biayna; Chelly, Jamel; Dobyns, William B.; Bilguvar, Kaya; Abou Jamra, Rami; Gunel, Murat; Gleeson, Joseph G.
Neuronal migration defects, including pachygyria, are among the most severe developmental brain defects in humans. Here, we identify biallelic truncating mutations in CTNNA2, encoding alpha N-catenin, in patients with a distinct recessive form of pachygyria. CTNNA2 was expressed in human cerebral cortex, and its loss in neurons led to defects in neurite stability and migration. The alpha N-catenin paralog, alpha E-catenin, acts as a switch regulating the balance between beta-catenin and Arp2/3 actin filament activities(1). Loss of alpha N-catenin did not affect beta-catenin signaling, but recombinant alpha N-catenin interacted with purified actin and repressed ARP2/3 actin-branching activity. The actin-binding domain of alpha N-catenin or ARP2/3 inhibitors rescued the neuronal phenotype associated with CTNNA2 loss, suggesting ARP2/3 de-repression as a potential disease mechanism. Our findings identify CTNNA2 as the first catenin family member with biallelic mutations in humans, causing a new pachygyria syndrome linked to actin regulation, and uncover a key factor involved in ARP2/3 repression in neurons.
Clinical and Radiographic Features of the Autosomal Recessive form of Brachyolmia Caused by PAPSS2 Mutations
(WILEY, 2013-01-01) Iida, Aritoshi; Simsek-Kiper, Pelin Ozlem; Mizumoto, Shuji; Hoshino, Touma; Elcioglu, Nursel; Horemuzova, Eva; Geiberger, Stefan; Yesil, Gozde; Kayserili, Hulya; Utine, Gulen Eda; Boduroglu, Koray; Watanabe, Shigehiko; Ohashi, Hirofumi; Alanay, Yasemin; Sugahara, Kazuyuki; Nishimura, Gen; Ikegawa, Shiro
Brachyolmia is a heterogeneous skeletal dysplasia characterized by generalized platyspondyly without significant long-bone abnormalities. Based on the mode of inheritance and radiographic features, at least three types of brachyolmia have been postulated. We recently identified an autosomal recessive form of brachyolmia that is caused by loss-of-function mutations of PAPSS2, the gene encoding PAPS (3-phosphoadenosine 5-phosphosulfate) synthase 2. To understand brachyolmia caused by PAPSS2 mutations (PAPSS2-brachyolmia), we extended our PAPSS2 mutation analysis to 13 patients from 10 families and identified homozygous or compound heterozygous mutations in all. Nine different mutations were found: three splice donor-site mutations, three missense mutations, and three insertion or deletion mutations within coding regions. In vitro enzyme assays showed that the missense mutations were also loss-of-function mutations. Phenotypic characteristics of PAPSS2-brachyolmia include short-trunk short stature, normal intelligence and facies, spinal deformity, and broad proximal interphalangeal joints. Radiographic features include platyspondyly with rectangular vertebral bodies and irregular end plates, broad ilia, metaphyseal changes of the proximal femur, including short femoral neck and striation, and dysplasia of the short tubular bones. PAPSS2-brachyolmia includes phenotypes of the conventional clinical concept of brachyolmia, the Hobaek and Toledo types, and is associated with abnormal androgen metabolism. (C) 2013 Wiley Periodicals, Inc.
Further characterization of ATP6V0A2-related autosomal recessive cutis laxa
(SPRINGER, 2012-01-01) Fischer, Bjoern; Dimopoulou, Aikaterini; Egerer, Johannes; Gardeitchik, Thatjana; Kidd, Alexa; Jost, Dominik; Kayserili, Hulya; Alanay, Yasemin; Tantcheva-Poor, Iliana; Mangold, Elisabeth; Daumer-Haas, Cornelia; Phadke, Shubha; Peirano, Reto I.; Heusel, Julia; Desphande, Charu; Gupta, Neerja; Nanda, Arti; Felix, Emma; Berry-Kravis, Elisabeth; Kabra, Madhulika; Wevers, Ron A.; van Maldergem, Lionel; Mundlos, Stefan; Morava, Eva; Kornak, Uwe
Autosomal recessive cutis laxa (ARCL) syndromes are phenotypically overlapping, but genetically heterogeneous disorders. Mutations in the ATP6V0A2 gene were found to underlie both, autosomal recessive cutis laxa type 2 (ARCL2), Debr, type, and wrinkly skin syndrome (WSS). The ATP6V0A2 gene encodes the a2 subunit of the V-type H+-ATPase, playing a role in proton translocation, and possibly also in membrane fusion. Here, we describe a highly variable phenotype in 13 patients with ARCL2, including the oldest affected individual described so far, who showed strikingly progressive dysmorphic features and heterotopic calcifications. In these individuals we identified 17 ATP6V0A2 mutations, 14 of which are novel. Furthermore, we demonstrate a localization of ATP6V0A2 at the Golgi-apparatus and a loss of the mutated ATP6V0A2 protein in patients' dermal fibroblasts. Investigation of brefeldin A-induced Golgi collapse in dermal fibroblasts as well as in HeLa cells deficient for ATP6V0A2 revealed a delay, which was absent in cells deficient for the ARCL-associated proteins GORAB or PYCR1. Furthermore, fibroblasts from patients with ATP6V0A2 mutations displayed elevated TGF-beta signalling and increased TGF-beta 1 levels in the supernatant. Our current findings expand the genetic and phenotypic spectrum and suggest that, besides the known glycosylation defect, alterations in trafficking and signalling processes are potential key events in the pathogenesis of ATP6V0A2-related ARCL.
Homozygous, and compound heterozygous mutation in 3 Turkish family with Jervell and Lange-Nielsen syndrome: case reports
(BIOMED CENTRAL LTD, 2017-01-01) Uysal, Fahrettin; Turkgenc, Burcu; Toksoy, Guven; Bostan, Ozlem M.; Evke, Elif; Uyguner, Oya; Yakicier, Cengiz; Kayserili, Hulya; Cil, Ergun; Temel, Sehime G.
Background: Jervell and Lange-Nielsen syndrome (JLNS) isa recessive model of long QT syndrome which might also be related to possible hearing loss. Although the syndrome has been demonstrated to be originated from homozygous or compound heterozygous mutations in either the KCNQ1 or KCNE1 genes, additional mutations in other genetic loci should be considered, particularly in malignant course patients. Case presentations: Three patients were admitted into hospital due to recurrent seizures/syncope, intrauterine and postnatal bradycardia respectively
Imatinib response of gastrointestinal stromal tumor patients with germline mutation on KIT exon 13: A family report
(BAISHIDENG PUBLISHING GROUP INC, 2017-01-01) Engin, Gulgun; Eraslan, Serpil; Kayserili, Hulya; Kapran, Yersu; Akman, Haluk; Akyuz, Ali; Aykan, Nuri Faruk
Familial gastrointestinal stromal tumor (GIST) is a rare autosomal dominant disorder associated with mutations in the KIT gene in the majority of cases. Although, exon 11 appears to be the hot spot region for approximately 95\% of germline mutations, pathogenic variations have also been identified in exon 8, 13 and 17. Exon 13 germline mutations are extremely rare amongst familial GISTs and seven families with a germline mutation have been reported to date. Moreover, the role of imatinib mesylate in this rare familiar settings is not completely known so far. We describe here clinical, imaging, pathological and genetic findings of a family with four affected members
Novel MASP1 mutations are associated with an expanded phenotype in 3MC1 syndrome
(BIOMED CENTRAL LTD, 2015-01-01) Atik, Tahir; Koparir, Asuman; Bademci, Guney; Foster II, Joseph; Altunoglu, Umut; Mutlu, Gul Yesiltepe; Bowdin, Sarah; Elcioglu, Nursel; Tayfun, Gulsen A.; Atik, Sevinc Sahin; Ozen, Mustafa; Ozkinay, Ferda; Alanay, Yasemin; Kayserili, Hulya; Thiel, Steffen; Tekin, Mustafa
Background: 3MC1 syndrome is a rare autosomal recessive disorder characterized by intellectual disability, short stature and distinct craniofacial, umbilical, and sacral anomalies. Five mutations in MASP1, encoding lectin complement pathway enzymes MASP-1 and MASP-3, have thus far been reported to cause 3MC1 syndrome. Only one previously reported mutation affects both MASP-1 and MASP-3, while the other mutations affect only MASP-3. Methods: We evaluated six unrelated individuals with 3MC1 syndrome and performed Sanger sequencing for all coding exons of MASP1. We also measured complement lectin and alternative pathway activities in an affected individual's serum. Results: We found two novel splice site mutations, c.1012-2A > G in one and c.891 + 1G > T in two probands, and three novel missense mutations, c.1451G > A (p.G484E), c.1657G > A (p.D553N), and c.1987G > T (p.D663Y). Missense mutations affect only MASP-3, while splice site mutations affect both MASP-1 and MASP-3. In a proband who is homozygous for c.891 + 1G > T, we detected a total lack of lectin complement pathway activity and a 2.5-fold lower alternative pathway activity. The phenotype observed in patients whose both MASP-1 and MASP-3 are affected and in those whose only MASP-3 is affected does not appear to be different. We observed structural brain abnormalities, neonatal tooth, a vascular anomaly and a solid lesion in liver as novel phenotypic features of 3MC1 syndrome. Conclusion: Novel mutations and additional phenotypic features expand the genotypic and phenotypic spectrum of 3MC1 syndrome. Although patients with MASP-1 dysfunction in addition to disrupted MASP-3 have an altered complement system, their disease phenotype is not different from those having only MASP-3 dysfunction.
RAP1-mediated MEK/ERK pathway defects in Kabuki syndrome
(AMER SOC CLINICAL INVESTIGATION INC, 2015-01-01) Boegershausen, Nina; Tsai, I.-Chun; Pohl, Esther; Kiper, Pelin Ozlem Simsek; Beleggia, Filippo; Percin, E. Ferda; Keupp, Katharina; Matchan, Angela; Milz, Esther; Alanay, Yasemin; Kayserili, Hulya; Liu, Yicheng; Banka, Siddharth; Kranz, Andrea; Zenker, Martin; Wieczorek, Dagmar; Elcioglu, Nursel; Prontera, Paolo; Lyonnet, Stanislas; Meitinger, Thomas; Stewart, A. Francis; Donnai, Dian; Strom, Tim M.; Boduroglu, Koray; Yigit, Goekhan; Li, Yun; Katsanis, Nicholas; Wollnik, Bernd
The genetic disorder Kabuki syndrome (KS) is characterized by developmental delay and congenital anomalies. Dominant mutations in the chromatin regulators lysine (K)-specific methyltransferase 2D (KMT2D) (also known as MLL2) and lysine (K)-specific demethylase 6A (KDM6A) underlie the majority of cases. Although the functions of these chromatin-modifying proteins have been studied extensively, the physiological systems regulated by them are largely unknown. Using whole-exome sequencing, we identified a mutation in RAP1A that was converted to homozygosity as the result of uniparental isodisomy (UPD) in a patient with KS and a de novo, dominant mutation in RAP1B in a second individual with a KS-like phenotype. We elucidated a genetic and functional interaction between the respective KS-associated genes and their products in zebrafish models and patient cell lines. Specifically, we determined that dysfunction of known KS genes and the genes identified in this study results in aberrant MEK/ERK signaling as well as disruption of F-actin polymerization and cell intercalation. Moreover, these phenotypes could be rescued in zebrafish models by rebalancing MEK/ERK signaling via administration of small molecule inhibitors of MEK. Taken together, our studies suggest that the KS pathophysiology overlaps with the RASopathies and provide a potential direction for treatment design.
The ARID1B spectrum in 143 patients: from nonsyndromic intellectual disability to Coffin-Siris syndrome
(SPRINGERNATURE, 2019-01-01) van der Sluijs, Pleuntje J.; Jansen, Sandra; Vergano, Samantha A.; Adachi-Fukuda, Miho; Alanay, Yasemin; AlKindy, Adila; Baban, Anwar; Bayat, Allan; Beck-Woedl, Stefanie; Berry, Katherine; Bijlsma, Emilia K.; Bok, Levinus A.; Brouwer, Alwin F. J.; van der Burgt, Ineke; Campeau, Philippe M.; Canham, Natalie; Chrzanowska, Krystyna; Chu, Yoyo W. Y.; Chung, Brain H. Y.; Dahan, Karin; De Rademaeker, Marjan; Destree, Anne; Dudding-Byth, Tracy; Earl, Rachel; Elcioglu, Nursel; Elias, Ellen R.; Fagerberg, Christina; Gardham, Alice; Gener, Blanca; Gerkes, Erica H.; Grasshoff, Ute; van Haeringen, Arie; Heitink, Karin R.; Herkert, Johanna C.; den Hollander, Nicolette S.; Horn, Denise; Hunt, David; Kant, Sarina G.; Kato, Mitsuhiro; Kayserili, Hulya; Kersseboom, Rogier; Kilic, Esra; Krajewska-Walasek, Malgorzata; Lammers, Kylin; Laulund, Lone W.; Lederer, Damien; Lees, Melissa; Lopez-Gonzalez, Vanesa; Maas, Saskia; Mancini, Grazia M. S.; Marcelis, Carlo; Martinez, Francisco; Maystadt, Isabelle; McGuire, Marianne; McKee, Shane; Mehta, Sarju; Metcalfe, Kay; Milunsky, Jeff; Mizuno, Seiji; Moeschler, John B.; Netzer, Christian; Ockeloen, Charlotte W.; Oehl-Jaschkowitz, Barbara; Okamoto, Nobuhiko; Olminkhof, Sharon N. M.; Orellana, Carmen; Pasquier, Laurent; Pottinger, Caroline; Riehmer, Vera; Robertson, Stephen P.; Roifman, Maian; Rooryck, Caroline; Ropers, Fabienne G.; Rosello, Monica; Ruivenkamp, Claudia A. L.; Sagiroglu, Mahmut S.; Sallevelt, Suzanne C. E. H.; Sanchis Calvo, Amparo; Simsek-Kiper, Pelin O.; Soares, Gabriela; Solaeche, Lucia; Sonmez, Fatma Mujgan; Splitt, Miranda; Steenbeek, Duco; Stegmann, Alexander P. A.; Stumpel, Constance T. R. M.; Tanabe, Saori; Uctepe, Eyyup; Utine, G. Eda; Veenstra-Knol, Hermine E.; Venkateswaran, Sunita; Vilain, Catheline; Vincent-Delorme, Catherine; Vulto-van Silfhout, Anneke T.; Wheeler, Patricia; Wilson, Golder N.; Wilson, Louise C.; Wollnik, Bernd; Kosho, Tomoki; Wieczorek, Dagmar; Eichler, Evan; Pfundt, Rolph; de Vries, Bert B. A.; Clayton-Smith, Jill; Santen, Gijs W. E.
Purpose: Pathogenic variants in ARID1B are one of the most frequent causes of intellectual disability (ID) as determined by large-scale exome sequencing studies. Most studies published thus far describe clinically diagnosed Coffin-Siris patients (ARID1BCSS) and it is unclear whether these data are representative for patients identified through sequencing of unbiased ID cohorts (ARID1B-ID). We therefore sought to determine genotypic and phenotypic differences between ARID1B-ID and ARID1B-CSS. In parallel, we investigated the effect of different methods of phenotype reporting. Methods: Clinicians entered clinical data in an extensive webbased survey. Results: 79 ARID1B-CSS and 64 ARID1B-ID patients were included. CSS-associated dysmorphic features, such as thick eyebrows, long eyelashes, thick alae nasi, long and/or broad philtrum, small nails and small or absent fifth distal phalanx and hypertrichosis, were observed significantly more often (p < 0.001) in ARID1B-CSS patients. No other significant differences were identified. Conclusion: There are only minor differences between ARID1BID and ARID1B-CSS patients. ARID1B-related disorders seem to consist of a spectrum, and patients should be managed similarly. We demonstrated that data collection methods without an explicit option to report the absence of a feature (such as most Human Phenotype Ontology-based methods) tended to underestimate gene-related features.
The ARID1B spectrum in 143 patients: from nonsyndromic intellectual disability to Coffin-Siris syndrome (vol 21, pg 1295, 2019)
(NATURE PUBLISHING GROUP, 2019-01-01) van der Sluijs, Pleuntje J.; Jansen, Sandra; Vergano, Samantha A.; Adachi-Fukuda, Miho; Alanay, Yasemin; AlKindy, Adila; Baban, Anwar; Bayat, Allan; Beck-Woedl, Stefanie; Berry, Katherine; Bijlsma, Emilia K.; Bok, Levinus A.; Brouwer, Alwin F. J.; van der Burgt, Ineke; Campeau, Philippe M.; Canham, Natalie; Chrzanowska, Krystyna; Chu, Yoyo W. Y.; Chung, Brain H. Y.; Dahan, Karin; De Rademaeker, Marjan; Destree, Anne; Dudding-Byth, Tracy; Earl, Rachel; Elcioglu, Nursel; Elias, Ellen R.; Fagerberg, Christina; Gardham, Alice; Gener, Blanca; Gerkes, Erica H.; Grasshoff, Ute; van Haeringen, Arie; Heitink, Karin R.; Herkert, Johanna C.; den Hollander, Nicolette S.; Horn, Denise; Hunt, David; Kant, Sarina G.; Kato, Mitsuhiro; Kayserili, Hulya; Kersseboom, Rogier; Kilic, Esra; Krajewska-Walasek, Malgorzata; Lammers, Kylin; Laulund, Lone W.; Lederer, Damien; Lees, Melissa; Lopez-Gonzalez, Vanesa; Maas, Saskia; Mancini, Grazia M. S.; Marcelis, Carlo; Martinez, Francisco; Maystadt, Isabelle; McGuire, Marianne; Mckee, Shane; Mehta, Sarju; Metcalfe, Kay; Milunsky, Jeff; Mizuno, Seiji; Moeschler, John B.; Netzer, Christian; Ockeloen, Charlotte W.; Oehl-Jaschkowitz, Barbara; Okamoto, Nobuhiko; Olminkhof, Sharon N. M.; Orellana, Carmen; Pasquier, Laurent; Pottinger, Caroline; Riehmer, Vera; Robertson, Stephen P.; Roifman, Maian; Rooryck, Caroline; Ropers, Fabienne G.; Rosello, Monica; Ruivenkamp, Claudia A. L.; Sagiroglu, Mahmut S.; Sallevelt, Suzanne C. E. H.; Calvo, Amparo Sanchis; Simsek-Kiper, Pelin O.; Soares, Gabriela; Solaeche, Lucia; Sonmez, Fatma Mujgan; Splitt, Miranda; Steenbeek, Duco; Stegmann, Alexander P. A.; Stumpel, Constance T. R. M.; Tanabe, Saori; Uctepe, Eyyup; Utine, G. Eda; Veenstra-Knol, Hermine E.; Venkateswaran, Sunita; Vilain, Catheline; Vincent-Delorme, Catherine; Vulto-van Silfhout, Anneke T.; Wheeler, Patricia; Wilson, Golder N.; Wilson, Louise C.; Wollnik, Bernd; Kosho, Tomoki; Wieczorek, Dagmar; Eichler, Evan; Pfundt, Rolph; de Vries, Bert B. A.; Clayton-Smith, Jill; Santen, Gijs W. E.