54 research outputs found

    CDH1 mutation distribution and type suggests genetic differences between the etiology of orofacial clefting and gastric cancer

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    Pathogenic variants in CDH1, encoding epithelial cadherin (E-cadherin), have been implicated in hereditary diffuse gastric cancer (HDGC), lobular breast cancer, and both syndromic and non-syndromic cleft lip/palate (CL/P). Despite the large number of CDH1 mutations described, the nature of the phenotypic consequence of such mutations is currently not able to be predicted, creating significant challenges for genetic counselling. This study collates the phenotype and molecular data for available CDH1 variants that have been classified, using the American College of Medical Genetics and Genomics criteria, as at least ‘likely pathogenic’, and correlates their molecular and structural characteristics to phenotype. We demonstrate that CDH1 variant type and location differ between HDGC and CL/P, and that there is clustering of CL/P variants within linker regions between the extracellular domains of the cadherin protein. While these differences do not provide for exact prediction of the phenotype for a given mutation, they may contribute to more accurate assessments of risk for HDGC or CL/P for individuals with specific CDH1 variants

    Autosomal dominant craniometaphyseal dysplasia is caused by mutations in the transmembrane protein ANK

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    Craniometaphyseal dysplasia (CMD) is a rare skeletal disorder characterized by progressive thickening and increased mineral density of craniofacial bones and abnormally developed metaphyses in long bones. Linkage studies mapped the locus for the autosomal dominant form of CMD to an similar to5-cM interval on chromosome 5p, which is defined by recombinations between loci D5S810 and D5S1954. Mutational analysis of positional candidate genes was performed, and we describe herein three different mutations, in five different families and in isolated cases, in ANK, a multipass transmembrane protein involved in the transport of intracellular pyrophosphate into extracellular matrix. the mutations are two in-frame deletions and one in-frame insertion caused by a splicing defect. All mutations cluster within seven amino acids in one of the six possible cytosolic domains of ANK. These results suggest that the mutated protein has a dominant negative effect on the function of ANK, since reduced levels of pyrophosphate in bone matrix are known to increase mineralization.Harvard Sch Dent Med, Forsyth Inst, Harvard Forsyth Dept Oral Biol, Boston, MA 02115 USAHarvard Univ, Sch Med, Childrens Hosp, Dept Cell Biol, Boston, MA USAHarvard Univ, Sch Med, Childrens Hosp, Dept Genet, Boston, MA USAHarvard Univ, Sch Med, Childrens Hosp, Div Plast Surg, Boston, MA USAUniversidade Federal de São Paulo, EPM, Campinas, SP, BrazilInst Cirurg Plast Craniofacial SOBRAPAR, Campinas, SP, BrazilShowa Univ, Sch Med, Dept Plast & Reconstruct Surg, Tokyo 142, JapanVirginia Commonwealth Univ, Med Coll Virginia, Dept Human Genet, Richmond, VA 23298 USASt Louis Univ, Sch Med, Cardinal Glennon Childrens Hosp, Div Med Genet, St Louis, MO 63104 USAUniv Cape Town, Sch Med, Dept Human Genet, ZA-7925 Cape Town, South AfricaOhio State Univ, Coll Dent, Dept Orthodont, Columbus, OH 43210 USAChildrens Hosp, Dept Genet, Columbus, OH 43205 USAUniv Minnesota, Sch Dent, Dept Oral Biol & Genet, Minneapolis, MN 55455 USAUniversidade Federal de São Paulo, EPM, Campinas, SP, BrazilWeb of Scienc

    The effect of systematic pediatric care on neonatal mortality and hospitalizations of infants born with oral clefts

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    <p>Abstract</p> <p>Background</p> <p>Cleft lip and/or palate (CL/P) increase mortality and morbidity risks for affected infants especially in less developed countries. This study aimed at assessing the effects of systematic pediatric care on neonatal mortality and hospitalizations of infants with cleft lip and/or palate (CL/P) in South America.</p> <p>Methods</p> <p>The intervention group included live-born infants with isolated or associated CL/P in 47 hospitals between 2003 and 2005. The control group included live-born infants with CL/P between 2001 and 2002 in the same hospitals. The intervention group received systematic pediatric care between the 7<sup>th </sup>and 28<sup>th </sup>day of life. The primary outcomes were mortality between the 7<sup>th </sup>and 28<sup>th </sup>day of life and hospitalization days in this period among survivors adjusted for relevant baseline covariates.</p> <p>Results</p> <p>There were no significant mortality differences between the intervention and control groups. However, surviving infants with associated CL/P in the intervention group had fewer hospitalization days by about six days compared to the associated control group.</p> <p>Conclusions</p> <p>Early systematic pediatric care may significantly reduce neonatal hospitalizations of infants with CL/P and additional birth defects in South America. Given the large healthcare and financial burden of CL/P on affected families and the relatively low cost of systematic pediatric care, improving access to such care may be a cost-effective public policy intervention.</p> <p>Trial Registration</p> <p>ClinicalTrials.gov: <a href="http://www.clinicaltrials.gov/ct2/show/NCT00097149">NCT00097149</a></p

    Systematic analysis of copy number variants of a large cohort of orofacial cleft patients identifies candidate genes for orofacial clefts

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