@article {213, title = {Dominant De Novo Mutations in GJA1 Cause Erythrokeratodermia Variabilis et Progressiva, without Features of Oculodentodigital Dysplasia.}, journal = {J Invest Dermatol}, volume = {135}, year = {2015}, month = {2015 Jun}, pages = {1540-1547}, abstract = {

Genetic investigation of inherited skin disorders has informed the understanding of skin self-renewal, differentiation, and barrier function. Erythrokeratodermia variabilis et progressiva (EKVP) is a rare, inherited skin disease that is characterized by transient figurate patches of erythema, localized or generalized scaling, and frequent palmoplantar keratoderma. By using exome sequencing, we show that de novo missense mutations in GJA1 (gap junction protein alpha 1) cause EKVP. The severe, progressive skin disease in EKVP subjects with GJA1 mutations is distinct from limited cutaneous findings rarely found in the systemic disorder oculodentodigital dysplasia, also caused by dominant GJA1 mutations. GJA1 encodes connexin 43 (Cx43), the most widely expressed gap junction protein. We show that the GJA1 mutations in EKVP subjects lead to disruption of Cx43 membrane localization and aggregation within the Golgi. These findings reveal a critical role for Cx43 in epidermal homeostasis, and they provide evidence of organ-specific pathobiology resulting from different mutations within GJA1.

}, keywords = {Amino Acid Sequence, Cell Membrane, Child, Child, Preschool, Connexin 43, Connexins, Craniofacial Abnormalities, Disease Progression, Erythrokeratodermia Variabilis, Exome, Eye Abnormalities, Female, Foot Deformities, Congenital, Golgi Apparatus, HeLa Cells, Humans, Immunohistochemistry, Male, Molecular Sequence Data, Mutagenesis, Site-Directed, Mutation, Phenotype, Sequence Analysis, DNA, Sequence Homology, Amino Acid, Skin Diseases, Syndactyly, Tooth Abnormalities}, issn = {1523-1747}, doi = {10.1038/jid.2014.485}, author = {Boyden, Lynn M and Craiglow, Brittany G and Zhou, Jing and Hu, Ronghua and Loring, Erin C and Morel, Kimberly D and Lauren, Christine T and Lifton, Richard P and Bilguvar, Kaya and Paller, Amy S and Choate, Keith A} } @article {138, title = {Mutations in TBX18 Cause Dominant Urinary Tract Malformations via Transcriptional Dysregulation of Ureter Development.}, journal = {Am J Hum Genet}, volume = {97}, year = {2015}, month = {2015 Aug 06}, pages = {291-301}, abstract = {

Congenital anomalies of the kidneys and urinary tract (CAKUT) are the most common cause of chronic kidney disease in the first three decades of life. Identification of single-gene mutations that cause CAKUT permits the first insights into related disease mechanisms. However, for most cases the underlying defect remains elusive. We identified a kindred with an autosomal-dominant form of CAKUT with predominant ureteropelvic junction obstruction. By whole exome sequencing, we identified a heterozygous truncating mutation (c.1010delG) of T-Box transcription factor 18 (TBX18) in seven affected members of the large kindred. A screen of additional families with CAKUT identified three families harboring two heterozygous TBX18 mutations (c.1570C>T and c.487A>G). TBX18 is essential for developmental specification of the ureteric mesenchyme and ureteric smooth muscle cells. We found that all three TBX18 altered proteins still dimerized with the wild-type protein but had prolonged protein half life and exhibited reduced transcriptional repression activity compared to wild-type TBX18. The p.Lys163Glu substitution altered an amino acid residue critical for TBX18-DNA interaction, resulting in impaired TBX18-DNA binding. These data indicate that dominant-negative TBX18 mutations cause human CAKUT by interference with TBX18 transcriptional repression, thus implicating ureter smooth muscle cell development in the pathogenesis of human CAKUT.

}, keywords = {Base Sequence, Electrophoretic Mobility Shift Assay, Exome, Gene Expression Regulation, Developmental, Genes, Dominant, HEK293 Cells, Humans, Immunohistochemistry, Immunoprecipitation, Microscopy, Fluorescence, Molecular Sequence Data, Muscle, Smooth, Mutation, Pedigree, Sequence Analysis, DNA, T-Box Domain Proteins, Ureter, Urinary Tract}, issn = {1537-6605}, doi = {10.1016/j.ajhg.2015.07.001}, author = {Vivante, Asaf and Kleppa, Marc-Jens and Schulz, Julian and Kohl, Stefan and Sharma, Amita and Chen, Jing and Shril, Shirlee and Hwang, Daw-Yang and Weiss, Anna-Carina and Kaminski, Michael M and Shukrun, Rachel and Kemper, Markus J and Lehnhardt, Anja and Beetz, Rolf and Sanna-Cherchi, Simone and Verbitsky, Miguel and Gharavi, Ali G and Stuart, Helen M and Feather, Sally A and Goodship, Judith A and Goodship, Timothy H J and Woolf, Adrian S and Westra, Sjirk J and Doody, Daniel P and Bauer, Stuart B and Lee, Richard S and Adam, Rosalyn M and Lu, Weining and Reutter, Heiko M and Kehinde, Elijah O and Mancini, Erika J and Lifton, Richard P and Tasic, Velibor and Lienkamp, Soeren S and J{\"u}ppner, Harald and Kispert, Andreas and Hildebrandt, Friedhelm} } @article {166, title = {Somatic V600E BRAF Mutation in Linear and Sporadic Syringocystadenoma Papilliferum.}, journal = {J Invest Dermatol}, volume = {135}, year = {2015}, month = {2015 Oct}, pages = {2536-2538}, keywords = {Biopsy, Needle, Child, Cystadenoma, Female, Gene Expression Regulation, Neoplastic, Humans, Immunohistochemistry, Mutation, Proto-Oncogene Proteins B-raf, Sweat Gland Neoplasms, Syringoma}, issn = {1523-1747}, doi = {10.1038/jid.2015.180}, author = {Levinsohn, Jonathan L and Sugarman, Jeffrey L and Bilguvar, Kaya and McNiff, Jennifer M and Choate, Keith A} } @article {209, title = {Dosage changes of a segment at 17p13.1 lead to intellectual disability and microcephaly as a result of complex genetic interaction of multiple genes.}, journal = {Am J Hum Genet}, volume = {95}, year = {2014}, month = {2014 Nov 06}, pages = {565-78}, abstract = {

The 17p13.1 microdeletion syndrome is a recently described genomic disorder with a core clinical phenotype of intellectual disability, poor to absent speech, dysmorphic features, and a constellation of more variable clinical features, most prominently microcephaly. We identified five subjects with copy-number variants (CNVs) on 17p13.1 for whom we performed detailed clinical and molecular studies. Breakpoint mapping and retrospective analysis of published cases refined the smallest region of overlap (SRO) for microcephaly to a genomic interval containing nine genes. Dissection of this phenotype in zebrafish embryos revealed a complex genetic architecture: dosage perturbation of four genes (ASGR1, ACADVL, DVL2, and GABARAP) impeded neurodevelopment and decreased dosage of the same loci caused a reduced mitotic index in~vitro. Moreover, epistatic analyses in~vivo showed that dosage perturbations of discrete gene pairings induce microcephaly. Taken together, these studies support a model in which concomitant dosage perturbation of multiple genes within the CNV drive the microcephaly and possibly other neurodevelopmental phenotypes associated with rearrangements in the 17p13.1 SRO.

}, keywords = {Abnormalities, Multiple, Acyl-CoA Dehydrogenase, Long-Chain, Adaptor Proteins, Signal Transducing, Animals, Asialoglycoprotein Receptor, Base Sequence, Cell Line, Chromosome Breakpoints, Chromosome Deletion, Chromosomes, Human, Pair 17, Dishevelled Proteins, Flow Cytometry, Gene Dosage, Humans, Immunohistochemistry, Intellectual Disability, Microcephaly, Microtubule-Associated Proteins, Molecular Sequence Data, Phosphoproteins, Retrospective Studies, Sequence Analysis, DNA, Smith-Magenis Syndrome, Syndrome, Zebrafish}, issn = {1537-6605}, doi = {10.1016/j.ajhg.2014.10.006}, author = {Carvalho, Claudia M B and Vasanth, Shivakumar and Shinawi, Marwan and Russell, Chad and Ramocki, Melissa B and Brown, Chester W and Graakjaer, Jesper and Skytte, Anne-Bine and Vianna-Morgante, Angela M and Krepischi, Ana C V and Patel, Gayle S and Immken, LaDonna and Aleck, Kyrieckos and Lim, Cynthia and Cheung, Sau Wai and Rosenberg, Carla and Katsanis, Nicholas and Lupski, James R} } @article {261, title = {Mutations in Alstr{\"o}m protein impair terminal differentiation of cardiomyocytes.}, journal = {Nat Commun}, volume = {5}, year = {2014}, month = {2014 Mar 04}, pages = {3416}, abstract = {

Cardiomyocyte cell division and replication in mammals proceed through embryonic development and abruptly decline soon after birth. The process governing cardiomyocyte cell cycle arrest is poorly understood. Here we carry out whole-exome sequencing in an infant with evidence of persistent postnatal cardiomyocyte replication to determine the genetic risk factors. We identify compound heterozygous ALMS1 mutations in the proband, and confirm their presence in her affected sibling, one copy inherited from each heterozygous parent. Next, we recognize homozygous or compound heterozygous truncating mutations in ALMS1 in four other children with high levels of postnatal cardiomyocyte proliferation. Alms1 mRNA knockdown increases multiple markers of proliferation in cardiomyocytes, the percentage of cardiomyocytes in G2/M phases, and the number of cardiomyocytes by 10\% in cultured cells. Homozygous Alms1-mutant mice have increased cardiomyocyte proliferation at 2 weeks postnatal compared with wild-type littermates. We conclude that deficiency of Alstr{\"o}m protein impairs postnatal cardiomyocyte cell cycle arrest.

}, keywords = {Animals, Cell Cycle, Cell Differentiation, Cells, Cultured, DNA-Binding Proteins, Humans, Immunohistochemistry, Mice, Molecular Sequence Data, Mutation, Myocytes, Cardiac, Proteins, Reverse Transcriptase Polymerase Chain Reaction}, issn = {2041-1723}, doi = {10.1038/ncomms4416}, author = {Shenje, Lincoln T and Andersen, Peter and Halushka, Marc K and Lui, Cecillia and Fernandez, Laviel and Collin, Gayle B and Amat-Alarcon, Nuria and Meschino, Wendy and Cutz, Ernest and Chang, Kenneth and Yonescu, Raluca and Batista, Denise A S and Chen, Yan and Chelko, Stephen and Crosson, Jane E and Scheel, Janet and Vricella, Luca and Craig, Brian D and Marosy, Beth A and Mohr, David W and Hetrick, Kurt N and Romm, Jane M and Scott, Alan F and Valle, David and Naggert, J{\"u}rgen K and Kwon, Chulan and Doheny, Kimberly F and Judge, Daniel P} } @article {260, title = {Mutations in TJP2 cause progressive cholestatic liver disease.}, journal = {Nat Genet}, volume = {46}, year = {2014}, month = {2014 Apr}, pages = {326-8}, abstract = {

Elucidating genetic causes of cholestasis has proved to be important in understanding the physiology and pathophysiology of the liver. Here we show that protein-truncating mutations in the tight junction protein 2 gene (TJP2) cause failure of protein localization and disruption of tight-junction structure, leading to severe cholestatic liver disease. These findings contrast with those in the embryonic-lethal knockout mouse, highlighting differences in redundancy in junctional complexes between organs and species.

}, keywords = {Animals, Base Sequence, Cholestasis, Intrahepatic, High-Throughput Nucleotide Sequencing, Humans, Immunoblotting, Immunohistochemistry, Mice, Mice, Knockout, Microscopy, Electron, Transmission, Models, Biological, Molecular Sequence Data, Mutation, Pedigree, Real-Time Polymerase Chain Reaction, Sequence Alignment, Species Specificity, Tight Junctions, Zonula Occludens-2 Protein}, issn = {1546-1718}, doi = {10.1038/ng.2918}, author = {Sambrotta, Melissa and Strautnieks, Sandra and Papouli, Efterpi and Rushton, Peter and Clark, Barnaby E and Parry, David A and Logan, Clare V and Newbury, Lucy J and Kamath, Binita M and Ling, Simon and Grammatikopoulos, Tassos and Wagner, Bart E and Magee, John C and Sokol, Ronald J and Mieli-Vergani, Giorgina and Smith, Joshua D and Johnson, Colin A and McClean, Patricia and Simpson, Michael A and Knisely, A S and Bull, Laura N and Thompson, Richard J} }