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American Journal of Medical Genetics. Part A

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https://www.readbyqxmd.com/read/28796426/vitamin-d-levels-in-smith-lemli-opitz-syndrome
#1
Miyad Movassaghi, Simona Bianconi, Richard Feinn, Christopher A Wassif, Forbes D Porter
Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive congenital malformation syndrome caused by mutations in the 7-dehydrocholesterol reductase gene. This inborn error of cholesterol synthesis leads to elevated concentrations of 7-dehydrocholesterol (7-DHC). 7-DHC also serves as the precursor for vitamin D synthesis. Limited data is available on vitamin D levels in individuals with SLOS. Due to elevated concentrations of 7-DHC, we hypothesized that vitamin D status would be abnormal and possibly reach toxic levels in patients with SLOS...
August 10, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28782176/co-occurrence-of-sturge-weber-syndrome-and-klippel-trenaunay-weber-syndrome-phenotype-consideration-of-the-historical-aspect
#2
Yuri Sakaguchi, Toshiki Takenouchi, Tomoko Uehara, Kazuo Kishi, Takao Takahashi, Kenjiro Kosaki
No abstract text is available yet for this article.
August 6, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28777499/alg13-cdg-in-a-male-with-seizures-normal-cognitive-development-and-normal-transferrin-isoelectric-focusing
#3
Therese E Gadomski, Melody Bolton, Majid Alfadhel, Chris Dvorak, Olalekan A Ogunsakin, Stephen L Nelson, Eva Morava
ALG13-CDG has been recently discovered as a disorder of severe developmental, intellectual and speech disability, microcephaly, visual abnormalities, seizures, hepatomegaly, coagulation abnormalities, and abnormal serumtransferrin isoelectric focusing in serum. A male with seizures, delayed motor, and speech development, but normal cognition carried a hemizygous, predicted pathogenic ALG13 variant (p.E463G). N-glycosylation studies in plasma were normal. ICAM-1 expression was decreased in patient fibroblasts, supporting the variant's pathogenicity...
August 4, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28777491/identification-of-stac3-variants-in-non-native-american-families-with-overlapping-features-of-carey-fineman-ziter-syndrome-and-moebius-syndrome
#4
Aida Telegrafi, Bryn D Webb, Sarah M Robbins, Carlos E Speck-Martins, David FitzPatrick, Leah Fleming, Richard Redett, Andreas Dufke, Gunnar Houge, Jeske J T van Harssel, Alain Verloes, Angela Robles, Irini Manoli, Elizabeth C Engle, Ethylin W Jabs, David Valle, John Carey, Julie E Hoover-Fong, Nara L M Sobreira
Horstick et al. (2013) previously reported a homozygous p.Trp284Ser variant in STAC3 as the cause of Native American myopathy (NAM) in 5 Lumbee Native American families with congenital hypotonia and weakness, cleft palate, short stature, ptosis, kyphoscoliosis, talipes deformities, and susceptibility to malignant hyperthermia (MH). Here we present two non-Native American families, who were found to have STAC3 pathogenic variants. The first proband and her affected older sister are from a consanguineous Qatari family with a suspected clinical diagnosis of Carey-Fineman-Ziter syndrome (CFZS) based on features of hypotonia, myopathic facies with generalized weakness, ptosis, normal extraocular movements, cleft palate, growth delay, and kyphoscoliosis...
August 4, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28777490/a-novel-genetic-syndrome-with-stard9-mutation-and-abnormal-spindle-morphology
#5
Nobuhiko Okamoto, Yuki Tsuchiya, Fuyuki Miya, Tatsuhiko Tsunoda, Kumiko Yamashita, Keith A Boroevich, Mitsuhiro Kato, Shinji Saitoh, Mami Yamasaki, Yonehiro Kanemura, Kenjiro Kosaki, Daiju Kitagawa
Intellectual disability (ID) is one of neurodevelopmental disorders characterized by serious defects in both intelligence and adaptive behavior. Although it has been suggested that genetic aberrations associated with the process of cell division underlie ID, the cytological evidence for mitotic defects in actual patient's cells is rarely reported. Here, we report a novel mutation in the STARD9 (also known as KIF16A) gene found in a patient with severe ID, characteristic features, epilepsy, acquired microcephaly, and blindness...
August 4, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28777483/skewed-x-inactivation-in-a-family-with-dlg3-associated-x-linked-intellectual-disability
#6
Laura Gieldon, Luisa Mackenroth, Elitza Betcheva-Krajcir, Andreas Rump, Stefanie Beck-Wödl, Jens Schallner, Nataliya Di Donato, Evelin Schröck, Andreas Tzschach
Mutations in DLG3 are a rare cause of non-syndromic X-linked intellectual disability (XLID) (MRX90, OMIM *300189). Only ten DLG3 mutations have been reported to date. The majority of female heterozygous mutation carriers was healthy and had random X-inactivation patterns. We report on an XLID family with a novel DLG3 mutation. The 12-year-old male index patient had moderate intellectual disability (ID) and dysmorphic features. The mutation was also present in four female relatives. A maternal aunt had moderate ID and significantly skewed X-inactivation favorably inactivating the normal DLG3 allele...
August 4, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28777481/a-human-case-of-slc35a3-related-skeletal-dysplasia
#7
Andrew C Edmondson, Emma C Bedoukian, Matthew A Deardorff, Donna M McDonald-McGinn, Xueli Li, Miao He, Elaine H Zackai
Researchers have identified a subset of Holstein having a range of skeletal deformities, including vertebral anomalies, referred to as complex vertebral malformation due to mutations in the SLC35A3 gene. Here, we report the first case in humans of SLC35A3-related vertebral anomalies. Our patient had prenatally diagnosed anomalous vertebrae, including butterfly, and hemivertebrae throughout the spine, as well as cleft palate, micrognathia, patent foramen ovale, patent ductus arteriosus, posterior embryotoxon, short limbs, camptodactyly, talipes valgus, rocker bottom feet, and facial dysmorphism including proptosis, nevus flammeus, and a cupped left ear...
August 4, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28767196/two-unrelated-children-with-overlapping-6q25-3-deletions-motor-speech-disorders-and-language-delays
#8
Beate Peter, Hope Lancaster, Caitlin Vose, Amna Fares, Isabelle Schrauwen, Matthew Huentelman
Interstitial and terminal 6q25 deletions are associated with developmental delays, hypotonia, eye pathologies, craniofacial dysmorphologies, and structural brain anomalies. In most cases, speech and language deficits are not described in detail. We report on a case (Patient 1, age 7 years) with a de novo 6q25.3-qter deletion, 11.1 Mb long and encompassing 108 genes, and a case (Patient 2, age 5 years) with an inherited interstitial 6q25.3 deletion, located within Patient 1's deletion region and 403 kb long, the smallest 6q25 deletion reported to date...
August 2, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28767192/expanding-the-phenotype-of-dst-related-disorder-a-case-report-suggesting-a-genotype-phenotype-correlation
#9
Gerarda Cappuccio, Michele Pinelli, Annalaura Torella, Marianna Alagia, Renata Auricchio, Annamaria Staiano, Vincenzo Nigro, Nicola Brunetti-Pierri
The gene DST encodes for the large protein BPAG1 involved in hemidesmosomes. Its alternative splicing gives rise to tissue-enriched isoforms in brain, muscle, and skin. The few patients described so far with bi-allelic mutations in the DST gene have either a skin phenotype of epidermolysis bullosa simplex or a neurological phenotype. Here, we report a 17-year-old female individual presenting with a more complex phenotype consisting of both skin and neuronal involvement, in addition to several previously unreported findings, such as iris heterochromia, cataract, hearing impairment, syringomyelia, behavioral, and gastrointestinal issues, osteoporosis, and growth hormone deficiency...
August 2, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28763161/monoallelic-fgfr3-and-biallelic-alpl-mutations-in-a-thai-girl-with-hypochondroplasia-and-hypophosphatasia
#10
Thantrira Porntaveetus, Chalurmpon Srichomthong, Kanya Suphapeetiporn, Vorasuk Shotelersuk
Skeletal dysplasias are a complex group of more than 350 disorders with phenotypic and genotypic heterogeneity affecting bone and cartilage growth. We studied a 2-year-old girl and her 21-year-old mother with disproportionate short stature. In addition to typical features of hypochondroplasia found in both patients, the child had deformities of the extremity bones, metaphyseal flares, and bilateral transverse (Bowdler) fibular spurs with overlying skin dimples detected at birth. Intravenous pamidronate was started in the child since the age of 17 days, and then every two months...
August 1, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28763154/best-practices-in-peri-operative-management-of-patients-with-skeletal-dysplasias
#11
Klane K White, Viviana Bompadre, Michael J Goldberg, Michael B Bober, Tae-Joon Cho, Julie E Hoover-Fong, Melita Irving, William G Mackenzie, Shawn E Kamps, Cathleen Raggio, Gregory J Redding, Samantha S Spencer, Ravi Savarirayan, Mary C Theroux
Patients with skeletal dysplasia frequently require surgery. This patient population has an increased risk for peri-operative complications related to the anatomy of their upper airway, abnormalities of tracheal-bronchial morphology and function; deformity of their chest wall; abnormal mobility of their upper cervical spine; and associated issues with general health and body habitus. Utilizing evidence analysis and expert opinion, this study aims to describe best practices regarding the peri-operative management of patients with skeletal dysplasia...
August 1, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28763149/three-cases-of-multi-generational-pompe-disease-are-current-practices-missing-diagnostic-and-treatment-opportunities
#12
Paul McIntosh, Stephanie Austin, Jennifer Sullivan, Lauren Bailey, Carrie Bailey, David Viskochil, Priya S Kishnani
Pompe disease (Glycogen storage disease type II, GSDII, or acid maltase deficiency) is an autosomal recessive metabolic myopathy with a broad clinical spectrum, ranging from infantile to late-onset presentations. In 2015, Pompe disease was added as a core condition to the Recommended Uniform Screening Panel for state newborn screening (NBS). The clinical importance of Pompe disease is evolving with the use of NBS, increasing awareness of the disease, and higher than previously reported disease prevalence; however, current practices miss additional diagnostic and potential treatment opportunities in close relatives of the family proband...
August 1, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28749033/co-occurring-down-syndrome-and-sucla2-related-mitochondrial-depletion-syndrome
#13
Natario L Couser, Daniel S Marchuk, Laurie D Smith, Alexandra Arreola, Kathleen A Kaiser-Rogers, Joseph Muenzer, Arti Pandya, Muge Gucsavas-Calikoglu, Cynthia M Powell
Mitochondrial DNA depletion syndrome 5 (MIM 612073) is a rare autosomal recessive disorder caused by homozygous or compound heterozygous pathogenic variants in the beta subunit of the succinate-CoA ligase gene located within the 13q14 band. We describe two siblings of Hispanic descent with SUCLA2-related mitochondrial depletion syndrome (encephalomyopathic form with methylmalonic aciduria); the older sibling is additionally affected with trisomy 21. SUCLA2 sequencing identified homozygous p.Arg284Cys pathogenic variants in both patients...
July 27, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28748650/autopsy-findings-in-epg5-related-vici-syndrome-with-antenatal-onset
#14
Renaud Touraine, Annie Laquerrière, Carmen-Adina Petcu, Florent Marguet, Susan Byrne, Rachael Mein, Shu Yau, Shehla Mohammed, Laurent Guibaud, Mathias Gautel, Heinz Jungbluth
Vici syndrome is one of the most extensive inherited human multisystem disorders and due to recessive mutations in EPG5 encoding a key autophagy regulator with a crucial role in autophagosome-lysosome fusion. The condition presents usually early in life, with features of severe global developmental delay, profound failure to thrive, (acquired) microcephaly, callosal agenesis, cataracts, cardiomyopathy, hypopigmentation, and combined immunodeficiency. Clinical course is variable but usually progressive and associated with high mortality...
July 27, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28748642/noonan-syndrome-in-diverse-populations
#15
Paul Kruszka, Antonio R Porras, Yonit A Addissie, Angélica Moresco, Sofia Medrano, Gary T K Mok, Gordon K C Leung, Cedrik Tekendo-Ngongang, Annette Uwineza, Meow-Keong Thong, Premala Muthukumarasamy, Engela Honey, Ekanem N Ekure, Ogochukwu J Sokunbi, Nnenna Kalu, Kelly L Jones, Julie D Kaplan, Omar A Abdul-Rahman, Lisa M Vincent, Amber Love, Khadija Belhassan, Karim Ouldim, Ihssane El Bouchikhi, Anju Shukla, Katta M Girisha, Siddaramappa J Patil, Nirmala D Sirisena, Vajira H W Dissanayake, C Sampath Paththinige, Rupesh Mishra, Eva Klein-Zighelboim, Bertha E Gallardo Jugo, Miguel Chávez Pastor, Hugo H Abarca-Barriga, Steven A Skinner, Eloise J Prijoles, Eben Badoe, Ashleigh D Gill, Vorasuk Shotelersuk, Patroula Smpokou, Monisha S Kisling, Carlos R Ferreira, Leon Mutesa, Andre Megarbane, Antonie D Kline, Amy Kimball, Emmy Okello, Peter Lwabi, Twalib Aliku, Emmanuel Tenywa, Nonglak Boonchooduang, Pranoot Tanpaiboon, Antonio Richieri-Costa, Ambroise Wonkam, Brian H Y Chung, Roger E Stevenson, Marshall Summar, Kausik Mandal, Shubha R Phadke, María G Obregon, Marius G Linguraru, Maximilian Muenke
Noonan syndrome (NS) is a common genetic syndrome associated with gain of function variants in genes in the Ras/MAPK pathway. The phenotype of NS has been well characterized in populations of European descent with less attention given to other groups. In this study, individuals from diverse populations with NS were evaluated clinically and by facial analysis technology. Clinical data and images from 125 individuals with NS were obtained from 20 countries with an average age of 8 years and female composition of 46%...
July 27, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28742285/variable-expressivity-and-incomplete-penetrance-in-a-large-family-with-non-classical-diamond-blackfan-anemia-associated-with-ribosomal-protein-l11-splicing-variant
#16
Colleen M Carlston, Zeinab A Afify, Janice C Palumbos, Heidi Bagley, Carlos Barbagelata, Whitney L Wooderchak-Donahue, Rong Mao, John C Carey
Diamond-Blackfan anemia (DBA) is a group of clinically and genetically heterogeneous bone marrow failure disorders with or without congenital anomalies. Variable expressivity and incomplete penetrance have been observed within affected families. Diamond-Blackfan anemia-7 (DBA7), caused by heterozygous mutations in ribosomal protein L11 (RPL11), accounts for approximately 5% of DBA. DBA7 is usually characterized by early-onset bone marrow failure often accompanied by congenital malformations, especially thumb defects...
July 25, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28742282/med-resulting-from-recessively-inherited-mutations-in-the-gene-encoding-calcium-activated-nucleotidase-cant1
#17
Karthika Balasubramanian, Bing Li, Deborah Krakow, Lisette Nevarez, Patric J Ho, Julia A Ainsworth, Deborah A Nickerson, Michael J Bamshad, LaDonna Immken, Ralph S Lachman, Daniel H Cohn
Multiple Epiphyseal Dysplasia (MED) is a relatively mild skeletal dysplasia characterized by mild short stature, joint pain, and early-onset osteoarthropathy. Dominantly inherited mutations in COMP, MATN3, COL9A1, COL9A2, and COL9A3, and recessively inherited mutations in SLC26A2, account for the molecular basis of disease in about 80-85% of the cases. In two families with recurrent MED of an unknown molecular basis, we used exome sequencing and candidate gene analysis to identify homozygosity for recessively inherited missense mutations in CANT1, which encodes calcium-activated nucleotidase 1...
July 25, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28742279/additional-report-on-moreno-nishimura-schmidt-overgrowth-syndrome
#18
LETTER
Atsuhiko Handa, Koji Muroya, Tomohiro Ishii, Gen Nishimura
No abstract text is available yet for this article.
July 25, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28742278/agenesis-of-the-corpus-callosum-developmental-delay-autism-spectrum-disorder-facial-dysmorphism-and-posterior-polymorphous-corneal-dystrophy-associated-with-zeb1-gene-deletion
#19
Ayeshah Chaudhry, Brian H Chung, Dimitri J Stavropoulos, Marcela P Araya, Asim Ali, Elise Heon, David Chitayat
We report on a girl diagnosed prenatally with agenesis of the corpus callosum (ACC) on fetal ultrasound and MRI. On postnatal follow-up she was noted to have developmental delay, facial dysmorphism, autism spectrum disorder, and posterior polymorphous corneal dystrophy (PPD). Array-comparative genomic hybridization analysis (Array-CGH) showed a 2.05 Mb de novo interstitial deletion at 10p11.23p11.22. The deleted region overlaps 1 OMIM Morbid Map gene, ZEB1 (the zinc finger E-box binding homeobox transcription factor 1), previously associated with posterior polymorphous corneal dystrophy type 3 (PPCD3)...
July 25, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28742274/whole-exome-sequencing-identified-genetic-variations-in-chinese-hemangioblastoma-patients
#20
Dexuan Ma, Jingyun Yang, Ying Wang, Xiang Huang, Guhong Du, Liangfu Zhou
Hemangioblastomas (HBs) are uncommon tumors characterized by the presence of inactivating alterations in the von Hippel-Lindau (VHL) gene in inherited cases and by infrequent somatic mutation in sporadic entities. We performed whole exome sequencing on 11 HB patients to further elucidate the genetics of HBs. A total of 270 somatic variations in 219 genes, of which there were 86 mutations in 67 genes, were found in sporadic HBs, and 184 mutations were found in 154 genes in familial HBs. C: G>T: A and T: A>C: G mutations are relatively common in most HB patients...
July 25, 2017: American Journal of Medical Genetics. Part A
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