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https://www.readbyqxmd.com/read/28102598/novel-findings-of-left-ventricular-non-compaction-cardiomyopathy-microform-cleft-lip-and-poor-vision-in-patient-with-smc1a-associated-cornelia-de-lange-syndrome
#1
Tara L Wenger, Penny Chow, Stephanie C Randle, Anna Rosen, Craig Birgfeld, Joanna Wrede, Patrick Javid, Darcy King, Vivian Manh, Anne V Hing, Erin Albers
Relatively few patients with Cornelia de Lange syndrome (CdLS) due to SMC1A mutation have been reported, limiting understanding of the full extent of the phenotype. Compared to children with classic NIPBL-associated CdLS, patients with SMC1A-associated CdLS have a milder physical phenotype with prominent intellectual disability, high rate of cleft palate and absence of limb reductions. We present a patient with SMC1A-associated CdLS who had typical features including developmental delay, seizure disorder, feeding difficulties, hirsutism, and cleft palate...
February 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28102595/-they-can-t-find-anything-wrong-with-him-yet-mothers-experiences-of-parenting-an-infant-with-a-prenatally-diagnosed-copy-number-variant-cnv
#2
Allison Werner-Lin, Sarah Walser, Frances K Barg, Barbara A Bernhardt
Chromosome microarray (CMA) testing is used widely in prenatal settings. Some copy number variants (CNVs) detected using CMA are associated with variable or uncertain phenotype and/or possible neurocognitive involvement. Little is known about parenting an infant following such findings. Researchers conducted interviews with 23 mothers of infants diagnosed prenatally with a potentially pathogenic CNV to elicit perspectives on the child's development and disclosure of results to others. Interviews were audiotaped and analyzed for common themes...
February 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28101829/autism-spectrum-disorders%C3%A2-diagnosis-and-management
#3
REVIEW
Sharmila Banerjee Mukherjee
Autism Spectrum Disorder (ASD) is a neuro-developmental disorder commonly seen in children. It is characterized by age inappropriate, impaired social communication and the presence of stereotypic behavior. This disorder is hypothesized to result from cerebral dysfunction arising from a complex interaction between genetic, epigenetic and environmental factors. ASD should be suspected in children failing ASD specific screening tests, in the presence of red flags in social, language and/or play domains, in children with developmental or language delay, abnormal behavior, poor school performance or in those who are at high risk...
January 19, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28100676/gene-body-chromatin-modification-dynamics%C3%A2-mediate-epigenome-differentiation-in%C3%A2-arabidopsis
#4
Soichi Inagaki, Mayumi Takahashi, Aoi Hosaka, Tasuku Ito, Atsushi Toyoda, Asao Fujiyama, Yoshiaki Tarutani, Tetsuji Kakutani
Heterochromatin is marked by methylation of lysine 9 on histone H3 (H3K9me). A puzzling feature of H3K9me is that this modification localizes not only in promoters but also in internal regions (bodies) of silent transcription units. Despite its prevalence, the biological significance of gene-body H3K9me remains enigmatic. Here we show that H3K9me-associated removal of H3K4 monomethylation (H3K4me1) in gene bodies mediates transcriptional silencing. Mutations in an Arabidopsis H3K9 demethylase gene IBM1 induce ectopic H3K9me2 accumulation in gene bodies, with accompanying severe developmental defects...
January 18, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28100473/delineating-the-phenotypic-spectrum-of-bainbridge-ropers-syndrome-12-new-patients-with-de-novo-heterozygous-loss-of-function-mutations-in-asxl3-and-review-of-published-literature
#5
M Balasubramanian, J Willoughby, A E Fry, A Weber, H V Firth, C Deshpande, J N Berg, K Chandler, K A Metcalfe, W Lam, D Pilz, S Tomkins
BACKGROUND: Bainbridge-Ropers syndrome (BRPS) is a recently described developmental disorder caused by de novo truncating mutations in the additional sex combs like 3 (ASXL3) gene. To date, there have been fewer than 10 reported patients. OBJECTIVES: Here, we delineate the BRPS phenotype further by describing a series of 12 previously unreported patients identified by the Deciphering Developmental Disorders study. METHODS: Trio-based exome sequencing was performed on all 12 patients included in this study, which found a de novo truncating mutation in ASXL3...
January 18, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28100422/osteoarthritis-year-in-review-2016-genetics-genomics-and-epigenetics
#6
REVIEW
J B J van Meurs
The purpose of this narrative review is to provide an overview of last year's publications in the field of genetics, genomics and epigenetics in the osteoarthritis (OA) field. Major themes arising from a Pubmed search on (epi)genetics in OA were identified. In addition, general developments in the fast evolving field of (epi)genetics are reviewed and relevance for the OA field is summarized. In the last 5 years, a number of genome-wide association studies have identified a modest number of genetic loci associated to OA...
December 22, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28100326/-feeding-difficulty-and-developmental-delay-for-8-months-and-nystagmus-for-4-months-in-an-infant
#7
Jie Zhu, Fei Yu
Aromatic L-amino acid decarboxylase (AADC) deficiency is a rare autosomal recessive hereditary disease and is a congenital metabolic disorder of neurotransmitter biosynthesis. It is mainly manifested as hypotonia, oculogyric crisis, autonomic dysfunction, and developmental delay. This article reports a boy manifested as delayed motor development, hypotonia, and oculogyric crisis. Gene screening for metabolic disorders revealed new compound heterozygous mutations, c.1063dupA (p.I355fs) and c.250A>C (p.S84R), in the exon of DDC gene...
January 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28099482/a-new-statistical-approach-to-characterize-chemical-elicited-behavioral-effects-in-high-throughput-studies-using-zebrafish
#8
Guozhu Zhang, Lisa Truong, Robert L Tanguay, David M Reif
Zebrafish have become an important alternative model for characterizing chemical bioactivity, partly due to the efficiency at which systematic, high-dimensional data can be generated. However, these new data present analytical challenges associated with scale and diversity. We developed a novel, robust statistical approach to characterize chemical-elicited effects in behavioral data from high-throughput screening (HTS) of all 1,060 Toxicity Forecaster (ToxCast™) chemicals across 5 concentrations at 120 hours post-fertilization (hpf)...
2017: PloS One
https://www.readbyqxmd.com/read/28097057/a-gene-expression-study-of-dorso-ventrally-restricted-pigment-pattern-in-adult-fins-of-neolamprologus-meeli-an-african-cichlid-species
#9
Ehsan Pashay Ahi, Kristina M Sefc
Fish color patterns are among the most diverse phenotypic traits found in the animal kingdom. Understanding the molecular and cellular mechanisms that control in chromatophore distribution and pigmentation underlying this diversity is a major goal in developmental and evolutionary biology, which has predominantly been pursued in the zebrafish model system. Here, we apply results from zebrafish work to study a naturally occurring color pattern phenotype in the fins of an African cichlid species from Lake Tanganyika...
2017: PeerJ
https://www.readbyqxmd.com/read/28095616/using-xenopus-to-understand-human-disease-and-developmental-disorders
#10
REVIEW
Amy Sater, Sally A Moody
Model animals are crucial to biomedical research. Among the commonly used model animals, the amphibian, Xenopus, has had tremendous impact because of its unique experimental advantages, cost effectiveness, and close evolutionary relationship with mammals as a tetrapod. Over the past 50 years the use of Xenopus has made possible many fundamental contributions to biomedicine, and it is a cornerstone of research in cell biology, developmental biology, evolutionary biology, immunology, molecular biology, neurobiology, and physiology...
January 17, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/28094161/disinhibition-in-children-with-attention-deficit-hyperactivity-disorder-changes-in-oxy-hb-on-near-infrared-spectroscopy-during-rock-paper-scissors-task
#11
Sayaka Ishii, Yoshimi Kaga, Tomoko Tando, Kakuro Aoyagi, Fumikazu Sano, Hideaki Kanemura, Kanji Sugita, Masao Aihara
OBJECTIVE: Attention-deficit/hyperactivity disorder (AD/HD) is a common developmental disorder. Many reports have suggested that symptoms of AD/HD are related to frontal lobe dysfunctions, particularly disinhibition. However, measuring neurological findings with biomarkers during frontal functional tasks has sometimes been difficult in children with AD/HD. This study aimed to investigate frontal inhibitory function objectively in children with AD/HD during "rock, paper, scissors" (RPS) tasks, as a familiar game for Japanese children, using near-infrared spectroscopy (NIRS)...
January 13, 2017: Brain & Development
https://www.readbyqxmd.com/read/28094084/incontinence-and-psychological-symptoms-in-individuals-with-mowat-wilson-syndrome
#12
Justine Niemczyk, Stewart Einfeld, David Mowat, Monika Equit, Catharina Wagner, Leopold Curfs, Alexander von Gontard
BACKGROUND: Mowat-Wilson Syndrome (MWS) is caused by deletion/mutation of the ZEB2 gene on chromosome 2q22. MWS is characterized by a distinctive facial appearance, severe intellectual disability and other anomalies, e.g. seizures and/or Hirschsprung disease (HSCR). Most individuals have a sociable demeanor, but one third show psychological problems. AIMS: The aim was to investigate incontinence and psychological problems in MWS. METHODS AND PROCEDURES: 26 children (4-12 years), 13 teens (13-17 years) and 8 adults (>18years) were recruited through a MWS support group...
January 13, 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/28092460/a-three-dimensional-lymphatic-endothelial-cell-tube-formation-assay-to-identify-novel-kinases-involved-in-lymphatic-vessel-remodeling
#13
T Jessica Gambino, Steven P Williams, Carol Caesar, Daniel Resnick, Cameron J Nowell, Rae H Farnsworth, Marc G Achen, Steven A Stacker, Tara Karnezis
The lymphatic system is a series of vessels that transport cells and excess fluid from tissues to the blood vascular system. Normally quiescent, the lymphatics can grow or remodel in response to developmental, immunological, or cells pathological stimuli. Lymphatic vessels comprise lymphatic endothelial cells (LECs) that can respond to external growth factors by undergoing proliferation, migration, adhesion, and tube and lumen formation into new vessel structures, a process known as lymphangiogenesis. To understand the key gene and signaling pathways necessary for lymphangiogenesis and lymphatic vessel remodeling, we have developed a three-dimensional LEC tube formation assay to explore the role of kinase signaling in these processes...
January 2017: Assay and Drug Development Technologies
https://www.readbyqxmd.com/read/28090561/diversity-in-rotavirus-host-glycan-interactions-a-sweet-spectrum
#14
REVIEW
Sasirekha Ramani, Liya Hu, B V Venkataram Prasad, Mary K Estes
Interaction with cellular glycans is a critical initial step in the pathogenesis of many infectious agents. Technological advances in glycobiology have expanded the repertoire of studies delineating host glycan-pathogen interactions. For rotavirus, the VP8* domain of the outer capsid spike protein VP4 is known to interact with cellular glycans. Sialic acid was considered the key cellular attachment factor for rotaviruses for decades. Although this is true for many rotavirus strains causing infections in animals, glycan array screens show that many human rotavirus strains bind nonsialylated glycoconjugates, called histo-blood group antigens, in a strain-specific manner...
May 2016: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28088364/antibodies-from-novel-repertoires-to-defining-and-refining-the-structure-of-biologically-important-targets
#15
REVIEW
Paul J Conroy, Ruby H P Law, Tom Caradoc-Davies, James C Whisstock
Antibodies represent a highly successful class of molecules that bind a wide-range of targets in therapeutic-, diagnostic- and research-based applications. The antibody repertoire is composed of the building blocks required to develop an effective adaptive immune response against foreign insults. A number of species have developed novel genetic and structural mechanisms from which they derive these antibody repertoires, however, traditionally antibodies are derived from human, and rodent sources. Due to their high-value therapeutic, diagnostic, biotechnological and research applications, much innovation has resulted in techniques and approaches to isolate novel antibodies...
January 11, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28081440/a-knockout-screen-of-apiap2-genes-reveals-networks-of-interacting-transcriptional-regulators-controlling-the-plasmodium-life-cycle
#16
Katarzyna Modrzynska, Claudia Pfander, Lia Chappell, Lu Yu, Catherine Suarez, Kirsten Dundas, Ana Rita Gomes, David Goulding, Julian C Rayner, Jyoti Choudhary, Oliver Billker
A family of apicomplexa-specific proteins containing AP2 DNA-binding domains (ApiAP2s) was identified in malaria parasites. This family includes sequence-specific transcription factors that are key regulators of development. However, functions for the majority of ApiAP2 genes remain unknown. Here, a systematic knockout screen in Plasmodium berghei identified ten ApiAP2 genes that were essential for mosquito transmission: four were critical for the formation of infectious ookinetes, and three were required for sporogony...
January 11, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28079314/scn1a-gene-mutation-and-adaptive-functioning-in-18-vietnamese-children-with-dravet-syndrome
#17
Thi Thu Hang Do, Diem My Vu, Thi Thuy Kieu Huynh, Thi Khanh Van Le, Eun Hwa Sohn, Thieu Mai Thao Le, Huu Hao Ha, Chi Bao Bui
BACKGROUND AND PURPOSE: Dravet syndrome is a rare and severe type of epilepsy in infants. The heterogeneity in the overall intellectual disability that these patients suffer from has been attributed to differences in genetic background and epilepsy severity. METHODS: Eighteen Vietnamese children diagnosed with Dravet syndrome were included in this study. SCN1A variants were screened by direct sequencing and multiplex ligation-dependent probe amplification. Adaptive functioning was assessed in all patients using the Vietnamese version of the Vineland Adaptive Behavior Scales, and the results were analyzed relative to the SCN1A variants and epilepsy severity...
January 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/28075089/autism-spectrum-disorder-primary-care-principles
#18
Kristian E Sanchack, Craig A Thomas
Autism spectrum disorder is characterized by difficulty with social communication and restricted, repetitive patterns of behavior, interest, or activities. The Diagnostic and Statistical Manual of Mental Disorders, 5th ed., created an umbrella diagnosis that includes several previously separate conditions: autistic disorder, Asperger syndrome, childhood disintegrative disorder, and pervasive developmental disorder not otherwise specified. There is insufficient evidence to recommend screening for autism spectrum disorder in children 18 to 30 months of age in whom the disorder is not suspected; however, there is a growing body of evidence that early intensive behavioral intervention based on applied behavior analysis improves cognitive ability, language, and adaptive skills...
December 15, 2016: American Family Physician
https://www.readbyqxmd.com/read/28072670/instruments-to-identify-commercially-sexually-exploited-children-feasibility-of-use-in-an-emergency-department-setting
#19
Stephanie Armstrong
OBJECTIVE: This review examines the screening instruments that are in existence today to identify commercially sexually exploited children. The instruments are compared and evaluated for their feasibility of use in an emergency department setting. METHODS: Four electronic databases were searched to identify screening instruments that assessed solely for commercial sexual exploitation. Search terms included "commercially sexually exploited children," "CSEC," "domestic minor sex trafficking," "DMST," "juvenile sex trafficking," and "JST...
January 9, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28071977/effect-of-touch-screen-tablet-use-on-fine-motor-development-of-young-children
#20
Ling-Yi Lin, Rong-Ju Cherng, Yung-Jung Chen
AIM: To investigate the effects of touch-screen tablet use on the fine motor development of preschool children without developmental delay. METHODS: 40 children who used a touch-screen tablet more 60 minutes per week for at least 1 month received a 24-week home fine motor activity program using a touch-screen-tablet. 40 children matched for age (mean = 61.0 months) and sex who did not meet the criteria for previous tablet use received a 24-week program consisting of manual play activities...
January 10, 2017: Physical & Occupational Therapy in Pediatrics
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