75 results on '"Meeks N"'
Search Results
2. Expanding the phenotype of ASXL3-related syndrome: A comprehensive description of 45 unpublished individuals with inherited and de novo pathogenic variants in ASXL3
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Schirwani, S., Albaba, S., Carere, D.A., Sacoto, M.J. Guillen, Zamora, F. Milan, Si, Y., Rabin, R., Pappas, J., Renaud, D.L., Hauser, N., Reid, E., Blanchet, P., Foulds, N., Dixit, A., Fisher, R., Armstrong, R., Isidor, B., Cogne, B., Vergano, S. Schrier, Demirdas, S., Dykzeul, N., Cohen, J.S., Grand, K., Morel, D., Slavotinek, A., Albassam, H.F., Naik, S., Dean, J., Ragge, N., Cinzia, C., Tedesco, M.G., Harrison, R.E., Bouman, A., Palen, E., Challman, T.D., Willemsen, M.H., Vogt, J., Cunniff, C., Bergstrom, K., Walia, J.S., Bruel, A.L., Kini, U., Alkuraya, F.S., Slegesky, V., Meeks, N., Girotto, P., Johnson, D., Newbury-Ecob, R., Ockeloen, C.W., Prontera, P., Lynch, S.A., Li, D., Graham, J.M., Balasubramanian, M., and Clinical Genetics
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Adult ,Male ,Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7] ,Adolescent ,Hypertelorism ,Developmental Disabilities ,speech impairment ,Genetic Variation ,ASXL3 ,BRPS ,Young Adult ,Phenotype ,ASXL3-related syndrome ,Bainbridge–Ropers syndrome ,Neurodevelopmental Disorders ,intellectual disability ,Child, Preschool ,Mutation ,Humans ,Muscle Hypotonia ,Female ,Genetic Predisposition to Disease ,Child ,Transcription Factors - Abstract
Item does not contain fulltext The study aimed at widening the clinical and genetic spectrum of ASXL3-related syndrome, a neurodevelopmental disorder, caused by truncating variants in the ASXL3 gene. In this international collaborative study, we have undertaken a detailed clinical and molecular analysis of 45 previously unpublished individuals with ASXL3-related syndrome, as well as a review of all previously published individuals. We have reviewed the rather limited functional characterization of pathogenic variants in ASXL3 and discuss current understanding of the consequences of the different ASXL3 variants. In this comprehensive analysis of ASXL3-related syndrome, we define its natural history and clinical evolution occurring with age. We report familial ASXL3 pathogenic variants, characterize the phenotype in mildly affected individuals and discuss nonpenetrance. We also discuss the role of missense variants in ASXL3. We delineate a variable but consistent phenotype. The most characteristic features are neurodevelopmental delay with consistently limited speech, significant neuro-behavioral issues, hypotonia, and feeding difficulties. Distinctive features include downslanting palpebral fissures, hypertelorism, tubular nose with a prominent nasal bridge, and low-hanging columella. The presented data will inform clinical management of individuals with ASXL3-related syndrome and improve interpretation of new ASXL3 sequence variants.
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- 2021
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3. Characterization of patients referred for non-specific intellectual disability testing: the importance of autosomal genes for diagnosis
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Tan, C. A., Topper, S., del Gaudio, D., Nelakuditi, V., Shchelochkov, O., Nowaczyk, M. J.M., Zeesman, S., Brady, L., Russell, L., Meeks, N., Sastry, S., Arndt, K., Kobiernicki, F., Shaw, R., and Das, S.
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- 2016
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4. Germline mutation in POLR2A: a heterogeneous, multi-systemic developmental disorder characterized by transcriptional dysregulation.
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Hansen, AW, Arora, P, Khayat, MM, Smith, LJ, Lewis, AM, Rossetti, LZ, Jayaseelan, J, Cristian, I, Haynes, D, DiTroia, S, Meeks, N, Delgado, MR, Rosenfeld, JA, Pais, L, White, SM, Meng, Q, Pehlivan, D, Liu, P, Gingras, M-C, Wangler, MF, Muzny, DM, Lupski, JR, Kaplan, CD, Gibbs, RA, Hansen, AW, Arora, P, Khayat, MM, Smith, LJ, Lewis, AM, Rossetti, LZ, Jayaseelan, J, Cristian, I, Haynes, D, DiTroia, S, Meeks, N, Delgado, MR, Rosenfeld, JA, Pais, L, White, SM, Meng, Q, Pehlivan, D, Liu, P, Gingras, M-C, Wangler, MF, Muzny, DM, Lupski, JR, Kaplan, CD, and Gibbs, RA
- Abstract
De novo germline variation in POLR2A was recently reported to associate with a neurodevelopmental disorder. We report twelve individuals harboring putatively pathogenic de novo or inherited variants in POLR2A, detail their phenotypes, and map all known variants to the domain structure of POLR2A and crystal structure of RNA polymerase II. Affected individuals were ascertained from a local data lake, pediatric genetics clinic, and an online community of families of affected individuals. These include six affected by de novo missense variants (including one previously reported individual), four clinical laboratory samples affected by missense variation with unknown inheritance-with yeast functional assays further supporting altered function-one affected by a de novo in-frame deletion, and one affected by a C-terminal frameshift variant inherited from a largely asymptomatic mother. Recurrently observed phenotypes include ataxia, joint hypermobility, short stature, skin abnormalities, congenital cardiac abnormalities, immune system abnormalities, hip dysplasia, and short Achilles tendons. We report a significantly higher occurrence of epilepsy (8/12, 66.7%) than previously reported (3/15, 20%) (p value = 0.014196; chi-square test) and a lower occurrence of hypotonia (8/12, 66.7%) than previously reported (14/15, 93.3%) (p value = 0.076309). POLR2A-related developmental disorders likely represent a spectrum of related, multi-systemic developmental disorders, driven by distinct mechanisms, converging at a single locus.
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- 2021
5. Pottery technology in the Tang dynasty (ninth century ad ): archaeometric analyses of a Gongyi sherd found at Siraf, Iran
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Spataro, M., primary, Wood, N., additional, Meeks, N., additional, Meek, A., additional, and Priestman, S., additional
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- 2018
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6. THE USE OF REPLICA TECHNIQUES AND THE SCANNING ELECTRON MICROSCOPE IN THE STUDY OF ANCIENT GLASS
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Werner, A. E., Bimson, M., and Meeks, N. D.
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- 1975
7. De Novo Missense Mutations in DHX30 Impair Global Translation and Cause a Neurodevelopmental Disorder
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Lessel, D., Schob, C., Kury, S., Reinders, M.R.F., Harel, T., Eldomery, M.K., Coban-Akdemir, Z., Denecke, J., Edvardson, S., Colin, E., Stegmann, A.P., Gerkes, E.H., Tessarech, M., Bonneau, D., Barth, M., Besnard, T., Cogne, B., Revah-Politi, A., Strom, T.M., Rosenfeld, J.A., Yang, Y, Posey, J.E., Immken, L., Oundjian, N., Helbig, K.L., Meeks, N., Zegar, K., Morton, J., Schieving, J.H., Claasen, A., Huentelman, M., Narayanan, V., Ramsey, K., Brunner, H.G., Elpeleg, O., Mercier, S., Bezieau, S., Kubisch, C., Kleefstra, T., Kindler, S., Lupski, J.R., Kreienkamp, H.J., Lessel, D., Schob, C., Kury, S., Reinders, M.R.F., Harel, T., Eldomery, M.K., Coban-Akdemir, Z., Denecke, J., Edvardson, S., Colin, E., Stegmann, A.P., Gerkes, E.H., Tessarech, M., Bonneau, D., Barth, M., Besnard, T., Cogne, B., Revah-Politi, A., Strom, T.M., Rosenfeld, J.A., Yang, Y, Posey, J.E., Immken, L., Oundjian, N., Helbig, K.L., Meeks, N., Zegar, K., Morton, J., Schieving, J.H., Claasen, A., Huentelman, M., Narayanan, V., Ramsey, K., Brunner, H.G., Elpeleg, O., Mercier, S., Bezieau, S., Kubisch, C., Kleefstra, T., Kindler, S., Lupski, J.R., and Kreienkamp, H.J.
- Abstract
Contains fulltext : 182457.pdf (publisher's version ) (Closed access), DHX30 is a member of the family of DExH-box helicases, which use ATP hydrolysis to unwind RNA secondary structures. Here we identified six different de novo missense mutations in DHX30 in twelve unrelated individuals affected by global developmental delay (GDD), intellectual disability (ID), severe speech impairment and gait abnormalities. While four mutations are recurrent, two are unique with one affecting the codon of one recurrent mutation. All amino acid changes are located within highly conserved helicase motifs and were found to either impair ATPase activity or RNA recognition in different in vitro assays. Moreover, protein variants exhibit an increased propensity to trigger stress granule (SG) formation resulting in global translation inhibition. Thus, our findings highlight the prominent role of translation control in development and function of the central nervous system and also provide molecular insight into how DHX30 dysfunction might cause a neurodevelopmental disorder.
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- 2017
8. Pottery technology in the Tang dynasty (ninth century ad): archaeometric analyses of a Gongyi sherd found at Siraf, Iran.
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Spataro, M., Wood, N., Meeks, N., Meek, A., and Priestman, S.
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GLAZES ,POTTERY ,X-ray fluorescence ,TECHNOLOGY ,SCANNING electron microscopy ,CERAMIC industries - Abstract
In 1969–70, a single Tang dynasty blue‐spotted Gongyi sherd was found at Siraf, Iran, the main trading port on the Persian Gulf in the early Islamic period. This is the only known example of Chinese blue‐and‐white ware, whether low‐ or high‐fired, found in the Middle East from such an early date. The sherd provides direct archaeological evidence for the Indian Ocean trade between China and the Middle East in the ninth century ad. The body paste, clear glaze and blue glaze or pigment were analysed by thin‐section petrography, scanning electron microscopy with energy‐dispersive X‐ray spectrometry (SEM‐EDX) and X‐ray fluorescence (XRF). The technological analysis reveals the different steps of the chaîne opératoire: clay mixing, slip and glaze application, and decoration with the cobalt blue glaze before high‐temperature firing. These steps are characteristic of Tang stoneware production at Gongyi in Henan province, China. The use of cobalt blue pigment as part of a simple spotted decoration scheme on the Gongyi sherd, and its find context within the Middle East, provides evidence for the complex interplay and influence occurring between Chinese and Middle East ceramic industries at this time. Closely comparable examples of contemporary low‐fired earthenware ceramics with cobalt blue decoration on a white tin glaze manufactured within the Middle East also occur within the same assemblage from Siraf. [ABSTRACT FROM AUTHOR]
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- 2019
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9. The formation of complex crusts in oil paints containing lead white and smalt: dissolution, depletion, diffusion, deposition
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van Loon, A., Noble, P., Boon, J.J., Meeks, N., Cartwright, C., Meek, A., Mongiatti, A., and CC overig (HIMS, FNWI)
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- 2012
10. Characterization of patients referred for non-specific intellectual disability testing: the importance of autosomal genes for diagnosis
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Tan, C.A., primary, Topper, S., additional, del Gaudio, D., additional, Nelakuditi, V., additional, Shchelochkov, O., additional, Nowaczyk, M.J.M., additional, Zeesman, S., additional, Brady, L., additional, Russell, L., additional, Meeks, N., additional, Sastry, S., additional, Arndt, K., additional, Kobiernicki, F., additional, Shaw, R., additional, and Das, S., additional
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- 2015
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11. An Iron Age Sword and Scabbard from Isleham
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Stead, Ian M, Hartwell, A P P, Lang, J R S, La Niece, S, and Meeks, N
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Proceedings of the Cambridge Antiquarian Society, 70, 61-74, TL 654755. The iron sword and incised and punched bronze scabbard were harrowed up in 1976. The bronze composition was analysed and SEM examination of the sword revealed a piled structure. The scabbard is a native product comparable with Witham and Battersea examples of 1st century BC. Votive deposit in old river bed?
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- 2008
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12. Les éléments de parure Bj 517 de la collection Campana et BM1980, 2-1, 118 du British Museum
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Guerra, Maria, Meeks, N., De la Molécule aux Nanos-objets : Réactivité, Interactions et Spectroscopies (MONARIS), and Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
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[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory ,[CHIM.ANAL]Chemical Sciences/Analytical chemistry ,[CHIM.MATE]Chemical Sciences/Material chemistry ,[SHS.HIST]Humanities and Social Sciences/History ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2006
13. SCIENTIFIC INVESTIGATION OF FAIENCE FRAGMENTS ATTRIBUTED TO THE TOWN MOSAIC AT KNOSSOS*
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SPATARO, M., primary, MEEKS, N., additional, MEEK, A. S., additional, and SHAPLAND, A. J., additional
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- 2012
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14. Copper-Doped Silica Materials Silanized With Bis-(Triethoxy Silyl Propyl)-Tetra Sulfide for Mercury Vapor Capture
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Meyer, D. E., primary, Meeks, N., additional, Sikdar, S., additional, Hutson, N. D., additional, Hua, D., additional, and Bhattacharyya, D., additional
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- 2008
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15. The technology of early platinum plating: a gold mask of the La Tolita culture, Ecuador
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Meeks, N., primary, La Niece, S., additional, and Estevez, P., additional
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- 2002
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16. METHODS OF ENGRAVING MESOPOTAMIAN CYLINDER SEALS: EXPERIMENTAL CONFIRMATION*
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SAX, M., primary, McNABB, J., additional, and MEEKS, N. D., additional
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- 1998
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17. The Celtic Warrior Fibula
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Stead, I. M., primary and Meeks, N. D., additional
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- 1996
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18. METHODS OF ENGRAVING MESOPOTAMIAN QUARTZ CYLINDER SEALS
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SAX, M., primary and MEEKS, N. D., additional
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- 1995
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19. The Introduction of Wheel Cutting as a Technique for Engraving Cylinder Seals: Its Distinction from Filing
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Sax, M., primary and Meeks, N. D., additional
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- 1994
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20. SCIENTIFIC INVESTIGATION OF FAIENCE FRAGMENTS ATTRIBUTED TO THE TOWN MOSAIC AT KNOSSOS*.
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SPATARO, M., MEEKS, N., MEEK, A. S., and SHAPLAND, A. J.
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FAIENCE , *COMMERCIAL art galleries , *MUSEUMS , *SCANNING electron microscopy , *ENERGY dispersive X-ray spectroscopy , *MICROSTRUCTURE , *MICROSPHERES - Abstract
We analysed a faience fragment from Bristol Museum and Art Gallery, to determine whether it belonged to the Town Mosaic, excavated at Knossos. Three Town Mosaic fragments from the Ashmolean Museum, Oxford were also examined. The objects were analysed using non-destructive variable-pressure scanning electron microscopy with energy-dispersive X-ray spectrometry. The Bristol object's composition and microstructures are similar to those of the Town Mosaic samples. Our results are also comparable to those from polished samples of Minoan faience (Tite et al. ), showing that VP SEM- EDX gives reliable results without invasive sampling. Silicaceous, copper-rich microspheres were identified for the first time in two of the Ashmolean objects. [ABSTRACT FROM AUTHOR]
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- 2013
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21. REPLY
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MEEKS, N. D., primary and CRADDOCK, P. T., additional
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- 1992
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22. THE DETECTION OF CADMIUM IN GOLD/SILVER ALLOYS AND ITS ALLEGED OCCURRENCE IN ANCIENT GOLD SOLDERS
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MEEKS, N. D., primary and CRADDOCK, P. T., additional
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- 1991
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23. IRON IN ANCIENT COPPER.
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CRADDOCK, P. T. and MEEKS, N. D.
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- 1987
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24. TIN-RICH SURFACES ON BRONZE-SOME EXPERIMENTAL AND ARCHAEOLOGICAL CONSIDERATIONS.
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MEEKS, N. D.
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- 1986
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25. RETENTION OF PHOSPHATE IN BURIED CERAMICS: AN ELECTRON MICROBEAM APPROACH.
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FREESTONE, I. C., MEEKS, N. D., and MIDDLETON, A. P.
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- 1985
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26. A new sample combustion bomb for radiocarbon dating
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Switsur, V.R., primary, Burleigh, R., additional, Meeks, N., additional, and Cleland, J.M., additional
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- 1974
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27. City-Wide Revival At Greater Walters Church.
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Meeks, N. L.
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- 1959
28. Rev. Earl J. Dodson Passes.
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Meeks, N. L.
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- 1962
29. 45th Session Of The Chicago District Conference.
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Meeks, N. L.
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- 1959
30. Geophysical studies at proposed low-level radioactive waste disposal sites in west Texas
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Meeks, N [Univ. of Texas, El Paso (United States)]
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- 1994
31. NEW METHOD FOR THE COMBUSTION OF SAMPLES FOR RADIOCARBON DATING.
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Meeks, N
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- 1969
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32. The role of double heterozygotes of SLC3A1 and SLC7A9 in the prevalence of cystine stones.
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Wilfred Wu CH, Patel I, Lovrenert K, Eisner B, Meeks N, Chun-Hui Tsai A, Baum M, Berry G, and Schumacher FR
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Purpose: Cystine stones, an autosomal recessive disorder caused by cystinuria, result from pathogenic variants of SLC3A1 and SLC7A9. Previous publications revealed that clinical prevalence is higher than genetically predicted prevalence. Heterozygotes in either gene are not stone formers. However, double heterozygotes (DH), individuals with 2 heterozygous pathogenic variants in both genes, were never evaluated and may explain the gap between clinical and genetic prevalence., Methods: Because of the rarity of the condition, direct clinical observation is impractical. We perform this population study as a surrogate by identifying the observed DH, deriving the theoretical/expected DH, and testing the null hypothesis (NH) that the observed DH frequency is equal or greater than expected. This NH biologically correlate to that DH are asymptomatic and do not have cystine stone., Results: Using the 1000 Genome Database, we identified 0 DH. We derived the theoretical/expected DH with Hardy-Weinberg Equilibrium and Mendel's law of independent assortment as 4.94 × 10-s. Population proportion test revealed z = -0.353, and P = .362, the NH cannot be rejected., Conclusion: Statistical testing does not support that DH are symptomatic, ie, DH of SLC3A1 and SLC7A9 may not present with cystine stone, and other factors responsible for the gap that current genetics knowledge cannot explain., Competing Interests: Conflict of Interest Chen-Han Wilfred Wu: Executive Committee of the Harrington Scholar-Innovator Award Program, Clinical Trials with Moderna. Michelle Baum: Clinical Trials with NovoNordisk, scientific advisory with NovoNordisk, ongoing post-marketing study with Alynylam, scientific advisory with Alnylam. Cantero (previously Orfan)-medical advisory; Chinook-medical advisory., (Copyright © 2024 American College of Medical Genetics and Genomics. Published by Elsevier Inc. All rights reserved.)
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- 2024
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33. Variants in LRRC7 lead to intellectual disability, autism, aggression and abnormal eating behaviors.
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Willim J, Woike D, Greene D, Das S, Pfeifer K, Yuan W, Lindsey A, Itani O, Böhme AL, Tibbe D, Hönck HH, Hassani Nia F, Zech M, Brunet T, Faivre L, Sorlin A, Vitobello A, Smol T, Colson C, Baranano K, Schatz K, Bayat A, Schoch K, Spillmann R, Davis EE, Conboy E, Vetrini F, Platzer K, Neuser S, Gburek-Augustat J, Grace AN, Mitchell B, Stegmann A, Sinnema M, Meeks N, Saunders C, Cadieux-Dion M, Hoyer J, Van-Gils J, de Sainte-Agathe JM, Thompson ML, Bebin EM, Weisz-Hubshman M, Tabet AC, Verloes A, Levy J, Latypova X, Harder S, Silverman GA, Pak SC, Schedl T, Freson K, Mumford A, Turro E, Schlein C, Shashi V, and Kreienkamp HJ
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- Adolescent, Adult, Animals, Child, Child, Preschool, Female, Humans, Male, Young Adult, HEK293 Cells, Membrane Proteins genetics, Membrane Proteins metabolism, Nerve Tissue Proteins genetics, Nerve Tissue Proteins metabolism, Neurons metabolism, PDZ Domains genetics, Synapses metabolism, Aggression, Autistic Disorder genetics, Autistic Disorder metabolism, Intellectual Disability genetics
- Abstract
Members of the leucine rich repeat (LRR) and PDZ domain (LAP) protein family are essential for animal development and histogenesis. Densin-180, encoded by LRRC7, is the only LAP protein selectively expressed in neurons. Densin-180 is a postsynaptic scaffold at glutamatergic synapses, linking cytoskeletal elements with signalling proteins such as the α-subunit of Ca
2+ /calmodulin-dependent protein kinase II. We have previously observed an association between high impact variants in LRRC7 and Intellectual Disability; also three individual cases with variants in LRRC7 had been described. We identify here 33 individuals (one of them previously described) with a dominant neurodevelopmental disorder due to heterozygous missense or loss-of-function variants in LRRC7. The clinical spectrum involves intellectual disability, autism, ADHD, aggression and, in several cases, hyperphagia-associated obesity. A PDZ domain variant interferes with synaptic targeting of Densin-180 in primary cultured neurons. Using in vitro systems (two hybrid, BioID, coimmunoprecipitation of tagged proteins from 293T cells) we identified new candidate interaction partners for the LRR domain, including protein phosphatase 1 (PP1), and observed that variants in the LRR reduced binding to these proteins. We conclude that LRRC7 encodes a major determinant of intellectual development and behaviour., (© 2024. The Author(s).)- Published
- 2024
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34. Implementing evidence-based assertions of clinical actionability in the context of secondary findings: Updates from the ClinGen Actionability Working Group.
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Pak CM, Gilmore MJ, Bulkley JE, Chakraborty P, Dagan-Rosenfeld O, Foreman AKM, Gollob MH, Jenkins CL, Katz AE, Lee K, Meeks N, O'Daniel JM, Posey JE, Rego SM, Shah N, Steiner RD, Stergachis AB, Subramanian SL, Trotter T, Wallace K, Williams MS, Goddard KAB, Buchanan AH, Manickam K, Powell B, and Ezzell Hunter J
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- Humans, Genetic Testing methods, Incidental Findings, Whole Genome Sequencing, Evidence-Based Medicine methods
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Purpose: The ClinGen Actionability Working Group (AWG) developed an evidence-based framework to generate actionability reports and scores of gene-condition pairs in the context of secondary findings from genome sequencing. Here we describe the expansion of the framework to include actionability assertions., Methods: Initial development of the actionability rubric was based on previously scored adult gene-condition pairs and individual expert evaluation. Rubric refinement was iterative and based on evaluation, feedback, and discussion. The final rubric was pragmatically evaluated via integration into actionability assessments for 27 gene-condition pairs., Results: The resulting rubric has a 4-point scale (limited, moderate, strong, and definitive) and uses the highest-scoring outcome-intervention pair of each gene-condition pair to generate a preliminary assertion. During AWG discussions, predefined criteria and factors guide discussion to produce a consensus assertion for a gene-condition pair, which may differ from the preliminary assertion. The AWG has retrospectively generated assertions for all previously scored gene-condition pairs and are prospectively asserting on gene-condition pairs under assessment, having completed over 170 adult and 188 pediatric gene-condition pairs., Conclusion: The AWG expanded its framework to provide actionability assertions to enhance the clinical value of their resources and increase their utility as decision aids regarding return of secondary findings., Competing Interests: Conflict of Interest A. Buchanan has equity in MeTree and You, Inc. S. Rego is an employee and has options at BillionToOne, Inc. Dr Steiner is an employee with equity of PreventionGenetics, part of Exact Sciences, and reports consulting fees from Leadiant, Mirum, and PTC Therapeutics. All other authors declare no conflicts of interest., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
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- 2024
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35. Selecting outcomes for pragmatic clinical trials in dementia care: The IMPACT Collaboratory iLibrary.
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Hanson LC, Wessell K, Meeks N, Bennett AV, Toles M, Niznik J, Zimmerman S, Carpenter J, Ritchie CS, Ernecoff NC, and Saliba D
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- Humans, Cognition, Outcome Assessment, Health Care, Quality of Life, Alzheimer Disease diagnosis
- Abstract
Background: Many interventions improve care and outcomes for people with Alzheimer's Disease and related dementias (ADRD), yet are never disseminated. Pragmatic trials facilitate the adoption and dissemination of best practices, but gaps in pragmatic outcome measurement are a critical obstacle. Our objectives are (1) to describe the development and structure of the IMbedded Pragmatic ADRD Clinical Trials Collaboratory (IMPACT) iLibrary of potential outcome measures for ADRD pragmatic trials, and (2) to assess their pragmatic characteristics., Methods: We identified potential outcome measures from several sources: a database of administrative and clinical outcome measures from ADRD clinical trials registered in ClinicalTrials.gov, published reviews, and IMPACT pilot pragmatic trial outcome measures. The iLibrary reports (a) number of items, (b) completion time, (c) readability for diverse populations, (d) cost or copyright barriers to use, (e) method of administration, (f) assessor training burden, and (g) feasibility of data capture and interpretation in routine care; a summary of pragmatic characteristics of each outcome measure (high, moderate, low); items or descriptions of items; and links to primary citations regarding development or psychometric properties., Results: We included 140 outcome measures in the iLibrary: 66 administrative (100% were pragmatic) and 74 clinical (52% were pragmatic). The most commonly addressed outcome domains from administrative assessments included physical function, quality of care or communication concerns, and psychological symptoms or distress behaviors. The most commonly addressed outcome domains from clinical assessments were psychological symptoms or distress behaviors, physical function, cognitive function, and health-related quality of life., Conclusions: Pragmatic outcome measures are brief, meaningful to diverse populations, easily scored and interpreted by clinicians, and available in electronic format for analysis. The iLibrary can facilitate the selection of measures for a wide range of outcomes relevant to people with ADRD and their care partners., (© 2023 The American Geriatrics Society.)
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- 2024
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36. Cognitive Function and Postoperative Outcomes in Patients with Head and Neck Cancer.
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Larrabee K, Meeks N, Williams AM, Springer K, Siddiqui F, Chang SS, Ghanem T, Wu VF, Momin S, and Tam S
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- Humans, Male, Middle Aged, Retrospective Studies, Risk Factors, Cognition, Postoperative Complications epidemiology, Postoperative Complications etiology, Plastic Surgery Procedures, Head and Neck Neoplasms surgery
- Abstract
Objective: Determine the relationship between cognitive function and postoperative outcomes., Methods: This IRB-approved retrospective cohort study included all patients treated between August 2015 and March 2020 undergoing major surgery for aerodigestive cancer or cutaneous/thyroid cancer that required free-flap reconstruction at Henry Ford Hospital. Routine administration of the Montreal Cognitive Assessment (MoCA) was completed as part of preoperative psychosocial evaluation. Outcomes included postoperative diagnosis of delirium, discharge disposition, return to the emergency department within 30 days of surgery, and readmission within 30 days of surgery. Univariate and multivariate logistic regression were used to determine the associations between preoperative MoCA score and each outcome measure., Results: One hundred thirty-five patients with HNC were included in the study (mean [SD] age, 60.7 [±10.8] years; 70.4% [n = 95] male; 83.0% [n = 112] White, 16.3% [n = 22] Black). The average preoperative MoCA score was 23.4 (SD ± 4.5). Based on the MoCA score, 35% (n = 47) scored ≥26 (i.e., normal cognitive status), 55.6% (n = 75) scored between 18 and 25 (i.e., mild impairment), 8.1% (n = 11) scored between 10 and 17 (i.e., moderate impairment), and 1.5% (n = 2) scored <10 (i.e., severe impairment). After adjusting for other variables, a lower MoCA score was associated with discharge disposition to a location other than home and prolonged length of hospital stay., Conclusions: Preoperative cognitive function in patients undergoing major head and neck surgery for head and neck cancer was associated with discharge destination and length of stay., Level of Evidence: 3 Laryngoscope, 133:2999-3005, 2023., (© 2023 The American Laryngological, Rhinological and Otological Society, Inc.)
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- 2023
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37. Population genetics analysis of SLC3A1 and SLC7A9 revealed the etiology of cystine stone may be more than what our current genetic knowledge can explain.
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Wu CW, Badreddine J, Chang J, Huang YM, Kim FJ, Wild T, Tsai AC, Meeks N, Donalisio Da Silva R, Molina WR, and Schumacher FR
- Subjects
- Humans, Gene Frequency, Genetics, Population, Mutation, Amino Acid Transport Systems, Basic genetics, Cystine metabolism, Cystinuria genetics
- Abstract
Background: Cystine stone is a Mendelian genetic disease caused by SLC3A1 or SLC7A9. In this study, we aimed to estimate the genetic prevalence of cystine stones and compare it with the clinical prevalence to better understand the disease etiology., Methods: We analyzed genetic variants in the general population using the 1000 Genomes project and the Human Gene Mutation Database to extract all SLC3A1 and SLC7A9 pathogenic variants. All variants procured from both databases were intersected. Pathogenic allele frequency, carrier rate, and affected rate were calculated and estimated based on Hardy-Weinberg equilibrium., Results: We found that 9 unique SLC3A1 pathogenic variants were carried by 26 people and 5 unique SLC7A9 pathogenic variants were carried by 12 people, all of whom were heterozygote carriers. No homozygote, compoun d heterozygote, or double heterozygote was identified in the 1000 Genome database. Based on the Hardy-Weinberg equilibrium, the calculated genetic prevalence of cystine stone disease is 1 in 30,585., Conclusion: The clinical prevalence of cystine stone has been previously reported as 1 in 7,000, a notably higher figure than the genetic prevalence of 1 in 30,585 calculated in this study. This suggests that the etiology of cystine stone is more complex than what our current genetic knowledge can explain. Possible factors that may contribute to this difference include novel causal genes, undiscovered pathogenic variants, alternative inheritance models, founder effects, epigenetic modifications, environmental factors, or other modifying factors. Further investigation is needed to fully understand the etiology of cystine stone., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
- Published
- 2023
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38. Comfort First: Development and pilot testing of a web-based video training to disseminate Comfort Matters dementia care.
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Hanson LC, Meeks N, Guo J, Alonzo TRM, Mitchell KM, Gallagher M, Toles M, Harder B, and Zimmerman S
- Subjects
- Humans, Aged, Palliative Care, Quality of Life, Pain, Internet, Dementia therapy, Alzheimer Disease
- Abstract
Background: Alzheimer's disease-related dementias (ADRD) are a leading cause of disability and death. In late-stage ADRD most people prioritize comfort, but care to achieve comfort is rare. Comfort Matters combines palliative and geriatric care practices for nursing home dementia care, but in-person training reaches few sites. To facilitate dissemination, we developed Comfort First, a web-based training toolkit with video demonstration of Comfort Matters practices., Methods: We developed and pilot-tested Comfort First (NIA Intervention Stage 1). Stakeholder advisors representing nursing home residents, caregiver, and clinical perspectives guided development. Professional videographers filmed Comfort Matters staff to illustrate comfort-focused dementia care skills. Video training modules, supported by an implementation manual, address Understanding the Person with Dementia, Promoting Quality of Life and Comfort, Working as a Team, Responding When People with Dementia are Distressed, Addressing Pain, and Making Comfort First a Reality. We then delivered Comfort First to 3 nursing homes. Implementation and outcome evaluation assessed the number and clinically diverse roles of trained staff and post-test knowledge., Results: Nursing home staff roles (n = 146) were diverse: certified nursing assistants (40%), nurses (19%), administrators (11%), activities staff (6%), therapy staff (5%) and other roles. Individual participants' knowledge scores ranged from 50-100%; however average post-test knowledge scores were high, ranging from 90% (Addressing Pain) to 99% (Promoting Quality of Life and Comfort, Making Comfort First a Reality)., Conclusions: The Comfort First web-based training toolkit combines best practices in palliative care and geriatric care for ADRD, using video demonstrations to support broader dissemination of these skills. Initial evaluation demonstrates acceptability and knowledge uptake for staff in diverse clinical roles; future research should include evaluation of practice change. Consistent with the intent of its public funding, Comfort First will be widely disseminated at a minimal cost., (© 2023 The American Geriatrics Society.)
- Published
- 2023
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39. Effect of silica-core gold-shell nanoparticles on the kinetics of biohydrogen production and pollutant hydrogenation via organic acid photofermentation over enhanced near-infrared illumination.
- Author
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Ji Y, Sultan MA, Kim DY, Meeks N, Hastings JT, and Bhattacharyya D
- Abstract
A biological photoinduced fermentation process provides an alternative to traditional hydrogen productions. In this study, biohydrogen production was investigated at near IR region coupled to a near-field enhancement by silica-core gold-shell nanoparticles (NPs) over a range of acetate concentrations (5-40 mM) and light intensities (11-160 W/m
2 ). The kinetic data were modeled using modified Monod equations containing light intensity effects. The yields of H2 and CO2 produced per acetate were determined as 2.31 mol-H2 /mol-Ac and 0.83 mol-CO2 /mol-Ac and increased to 4.38 mmol-H2 /mmol-Ma and 2.62 mmol-CO2 /mmol-Ma when malate was used. Maximum increases in H2 and CO2 productions by 115% and 113% were observed by adding NPs without affecting the bacterial growth rates (6.1-8.2 mg-DCM/L/hour) while the highest hydrogen production rate was determined as 0.81 mmol/L/hour. Model simulations showed that the energy conversion efficiency increased with NPs concentration but decreased with the intensity. Complete hydrogenation application was demonstrated with toxic 2-chlorobiphenyl using Pd catalysts., Competing Interests: Declaration of competing interest The authors declare that they have no competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.- Published
- 2021
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40. Favorable outcome of COVID-19 among African American (AA) renal transplant recipients in Detroit.
- Author
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Jarrin Tejada CD, Zachariah M, Cruz ABV, Hussein S, Wipula E, Meeks N, Wolff J, and Chandrasekar PH
- Subjects
- Aged, Comorbidity, Female, Humans, Liver Failure surgery, Male, Michigan epidemiology, Middle Aged, RNA, Viral analysis, SARS-CoV-2 genetics, Black or African American, COVID-19 ethnology, Immunosuppression Therapy methods, Intensive Care Units, Kidney Transplantation, Liver Failure ethnology, Transplant Recipients
- Abstract
Transplant recipients are vulnerable to infections, including COVID-19, given their comorbidities and chronic immunosuppression. In this study, all hospitalized renal transplant recipients (RTR) with a positive nasal swab for Severe Acute Respiratory Syndrome-Coronavirus-2 (SARS-CoV2) seen consecutively between 03/01/2020 and 05/01/2020 at the Detroit Medical Center were included. Data on demographics, clinical presentation, laboratory findings, management, and outcomes were collected. Twenty-five patients were included, all African American (AA) and deceased-donor transplant recipients. The most common presenting symptom was dyspnea, followed by fever, cough and diarrhea. Multifocal opacities on initial chest x-ray were seen in 52% patients and 44% of patients had a presenting oxygen saturation of less than or equal to 94%. Four patients (16%) required transfer to the intensive care unit, one required intubation and one expired. COVID-19-infected RTR in this cohort had low mortality of 4% (n = 1). Despite multiple comorbidities and chronic immunosuppression, our cohort of African American RTR had favorable outcomes compared to other reports on COVID-19 in RTR., (© 2020 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
- Published
- 2021
- Full Text
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41. Germline mutation in POLR2A : a heterogeneous, multi-systemic developmental disorder characterized by transcriptional dysregulation.
- Author
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Hansen AW, Arora P, Khayat MM, Smith LJ, Lewis AM, Rossetti LZ, Jayaseelan J, Cristian I, Haynes D, DiTroia S, Meeks N, Delgado MR, Rosenfeld JA, Pais L, White SM, Meng Q, Pehlivan D, Liu P, Gingras MC, Wangler MF, Muzny DM, Lupski JR, Kaplan CD, and Gibbs RA
- Abstract
De novo germline variation in POLR2A was recently reported to associate with a neurodevelopmental disorder. We report twelve individuals harboring putatively pathogenic de novo or inherited variants in POLR2A , detail their phenotypes, and map all known variants to the domain structure of POLR2A and crystal structure of RNA polymerase II. Affected individuals were ascertained from a local data lake, pediatric genetics clinic, and an online community of families of affected individuals. These include six affected by de novo missense variants (including one previously reported individual), four clinical laboratory samples affected by missense variation with unknown inheritance-with yeast functional assays further supporting altered function-one affected by a de novo in-frame deletion, and one affected by a C-terminal frameshift variant inherited from a largely asymptomatic mother. Recurrently observed phenotypes include ataxia, joint hypermobility, short stature, skin abnormalities, congenital cardiac abnormalities, immune system abnormalities, hip dysplasia, and short Achilles tendons. We report a significantly higher occurrence of epilepsy (8/12, 66.7%) than previously reported (3/15, 20%) (p value = 0.014196; chi-square test) and a lower occurrence of hypotonia (8/12, 66.7%) than previously reported (14/15, 93.3%) (p value = 0.076309). POLR2A -related developmental disorders likely represent a spectrum of related, multi-systemic developmental disorders, driven by distinct mechanisms, converging at a single locus., Competing Interests: Declaration of interests J.R.L. has stock ownership in 23andMe, is a paid consultant for Regeneron Pharmaceuticals, and is a co-inventor on multiple US and European patents related to molecular diagnostics for inherited neuropathies, eye diseases, and bacterial genomic fingerprinting. The Department of Molecular and Human Genetics at Baylor College of Medicine derives revenue from clinical genetic testing offered in the Baylor Genetics Laboratory.
- Published
- 2021
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42. Rhodopseudomonas palustris -based conversion of organic acids to hydrogen using plasmonic nanoparticles and near-infrared light.
- Author
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Craven J, Sultan MA, Sarma R, Wilson S, Meeks N, Kim DY, Hastings JT, and Bhattacharyya D
- Abstract
The simultaneous elimination of organic waste and the production of clean fuels will have an immense impact on both the society and the industrial manufacturing sector. The enhanced understanding of the interface between nanoparticles and photo-responsive bacteria will further advance the knowledge of their interactions with biological systems. Although literature shows the production of gases by photobacteria, herein, we demonstrated the integration of photonics, biology, and nanostructured plasmonic materials for hydrogen production with a lower greenhouse CO
2 gas content at quantified light energy intensity and wavelength. Phototrophic purple non-sulfur bacteria were able to generate hydrogen as a byproduct of nitrogen fixation using the energy absorbed from visible and near-IR (NIR) light. This type of biological hydrogen production has suffered from low efficiency of converting light energy into hydrogen in part due to light sources that do not exploit the organisms' capacity for NIR absorption. We used NIR light sources and optically resonant gold-silica core-shell nanoparticles to increase the light utilization of the bacteria to convert waste organic acids such as acetic and maleic acids to hydrogen. The batch growth studies for the small cultures (40 mL) of Rhodopseudomonas palustris demonstrated >2.5-fold increase in hydrogen production when grown under an NIR source (167 ± 18 μmol H2 ) compared to that for a broad-band light source (60 ± 6 μmol H2 ) at equal light intensity (130 W m-2 ). The addition of the mPEG-coated optically resonant gold-silica core-shell nanoparticles in the solution further improved the hydrogen production from 167 ± 18 to 398 ± 108 μmol H2 at 130 W m-2 . The average hydrogen production rate with the nanoparticles was 127 ± 35 μmol L-1 h-1 at 130 W m-2 ., Competing Interests: The authors declare no conflict of interest., (This journal is © The Royal Society of Chemistry.)- Published
- 2019
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43. A clinically validated whole genome pipeline for structural variant detection and analysis.
- Author
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Neerman N, Faust G, Meeks N, Modai S, Kalfon L, Falik-Zaccai T, and Kaplun A
- Subjects
- Gene Frequency, Humans, Molecular Sequence Annotation, Phenotype, Reproducibility of Results, Genetic Variation, Whole Genome Sequencing methods
- Abstract
Background: With the continuing decrease in cost of whole genome sequencing (WGS), we have already approached the point of inflection where WGS testing has become economically feasible, facilitating broader access to the benefits that are helping to define WGS as the new diagnostic standard. WGS provides unique opportunities for detection of structural variants; however, such analyses, despite being recognized by the research community, have not previously made their way into routine clinical practice., Results: We have developed a clinically validated pipeline for highly specific and sensitive detection of structural variants basing on 30X PCR-free WGS. Using a combination of breakpoint analysis of split and discordant reads, and read depth analysis, the pipeline identifies structural variants down to single base pair resolution. False positives are minimized using calculations for loss of heterozygosity and bi-modal heterozygous variant allele frequencies to enhance heterozygous deletion and duplication detection respectively. Compound and potential compound combinations of structural variants and small sequence changes are automatically detected. To facilitate clinical interpretation, identified variants are annotated with phenotype information derived from HGMD Professional and population allele frequencies derived from public and Variantyx allele frequency databases. Single base pair resolution enables easy visual inspection of potentially causal variants using the IGV genome browser as well as easy biochemical validation via PCR. Analytical and clinical sensitivity and specificity of the pipeline has been validated using analysis of Genome in a Bottle reference genomes and known positive samples confirmed by orthogonal sequencing technologies., Conclusion: Consistent read depth of PCR-free WGS enables reliable detection of structural variants of any size. Annotation both on gene and variant level allows clinicians to match reported patient phenotype with detected variants and confidently report causative finding in all clinical cases used for validation.
- Published
- 2019
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44. Functional Dysregulation of CDC42 Causes Diverse Developmental Phenotypes.
- Author
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Martinelli S, Krumbach OHF, Pantaleoni F, Coppola S, Amin E, Pannone L, Nouri K, Farina L, Dvorsky R, Lepri F, Buchholzer M, Konopatzki R, Walsh L, Payne K, Pierpont ME, Vergano SS, Langley KG, Larsen D, Farwell KD, Tang S, Mroske C, Gallotta I, Di Schiavi E, Della Monica M, Lugli L, Rossi C, Seri M, Cocchi G, Henderson L, Baskin B, Alders M, Mendoza-Londono R, Dupuis L, Nickerson DA, Chong JX, Meeks N, Brown K, Causey T, Cho MT, Demuth S, Digilio MC, Gelb BD, Bamshad MJ, Zenker M, Ahmadian MR, Hennekam RC, Tartaglia M, and Mirzaa GM
- Subjects
- Abnormalities, Multiple metabolism, Abnormalities, Multiple pathology, Adolescent, Adult, Child, Child, Preschool, Craniofacial Abnormalities metabolism, Craniofacial Abnormalities pathology, Female, Gene Expression, Humans, Infant, Male, Models, Molecular, Muscular Atrophy metabolism, Muscular Atrophy pathology, Neurodevelopmental Disorders metabolism, Neurodevelopmental Disorders pathology, Noonan Syndrome metabolism, Noonan Syndrome pathology, Phenotype, Protein Structure, Secondary, Severity of Illness Index, cdc42 GTP-Binding Protein chemistry, cdc42 GTP-Binding Protein metabolism, Abnormalities, Multiple genetics, Craniofacial Abnormalities genetics, Genetic Heterogeneity, Muscular Atrophy genetics, Mutation, Missense, Neurodevelopmental Disorders genetics, Noonan Syndrome genetics, cdc42 GTP-Binding Protein genetics
- Abstract
Exome sequencing has markedly enhanced the discovery of genes implicated in Mendelian disorders, particularly for individuals in whom a known clinical entity could not be assigned. This has led to the recognition that phenotypic heterogeneity resulting from allelic mutations occurs more commonly than previously appreciated. Here, we report that missense variants in CDC42, a gene encoding a small GTPase functioning as an intracellular signaling node, underlie a clinically heterogeneous group of phenotypes characterized by variable growth dysregulation, facial dysmorphism, and neurodevelopmental, immunological, and hematological anomalies, including a phenotype resembling Noonan syndrome, a developmental disorder caused by dysregulated RAS signaling. In silico, in vitro, and in vivo analyses demonstrate that mutations variably perturb CDC42 function by altering the switch between the active and inactive states of the GTPase and/or affecting CDC42 interaction with effectors, and differentially disturb cellular and developmental processes. These findings reveal the remarkably variable impact that dominantly acting CDC42 mutations have on cell function and development, creating challenges in syndrome definition, and exemplify the importance of functional profiling for syndrome recognition and delineation., (Copyright © 2017 American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.)
- Published
- 2018
- Full Text
- View/download PDF
45. De Novo Missense Mutations in DHX30 Impair Global Translation and Cause a Neurodevelopmental Disorder.
- Author
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Lessel D, Schob C, Küry S, Reijnders MRF, Harel T, Eldomery MK, Coban-Akdemir Z, Denecke J, Edvardson S, Colin E, Stegmann APA, Gerkes EH, Tessarech M, Bonneau D, Barth M, Besnard T, Cogné B, Revah-Politi A, Strom TM, Rosenfeld JA, Yang Y, Posey JE, Immken L, Oundjian N, Helbig KL, Meeks N, Zegar K, Morton J, The Ddd Study, Schieving JH, Claasen A, Huentelman M, Narayanan V, Ramsey K, Brunner HG, Elpeleg O, Mercier S, Bézieau S, Kubisch C, Kleefstra T, Kindler S, Lupski JR, and Kreienkamp HJ
- Published
- 2018
- Full Text
- View/download PDF
46. De Novo Missense Mutations in DHX30 Impair Global Translation and Cause a Neurodevelopmental Disorder.
- Author
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Lessel D, Schob C, Küry S, Reijnders MRF, Harel T, Eldomery MK, Coban-Akdemir Z, Denecke J, Edvardson S, Colin E, Stegmann APA, Gerkes EH, Tessarech M, Bonneau D, Barth M, Besnard T, Cogné B, Revah-Politi A, Strom TM, Rosenfeld JA, Yang Y, Posey JE, Immken L, Oundjian N, Helbig KL, Meeks N, Zegar K, Morton J, Schieving JH, Claasen A, Huentelman M, Narayanan V, Ramsey K, Brunner HG, Elpeleg O, Mercier S, Bézieau S, Kubisch C, Kleefstra T, Kindler S, Lupski JR, and Kreienkamp HJ
- Subjects
- Adenosine Triphosphatases genetics, Adolescent, Amino Acids genetics, Cell Line, Cell Line, Tumor, Central Nervous System pathology, Child, Child, Preschool, Female, HEK293 Cells, Humans, Intellectual Disability genetics, Male, RNA genetics, Developmental Disabilities genetics, Mutation, Missense genetics, RNA Helicases genetics
- Abstract
DHX30 is a member of the family of DExH-box helicases, which use ATP hydrolysis to unwind RNA secondary structures. Here we identified six different de novo missense mutations in DHX30 in twelve unrelated individuals affected by global developmental delay (GDD), intellectual disability (ID), severe speech impairment and gait abnormalities. While four mutations are recurrent, two are unique with one affecting the codon of one recurrent mutation. All amino acid changes are located within highly conserved helicase motifs and were found to either impair ATPase activity or RNA recognition in different in vitro assays. Moreover, protein variants exhibit an increased propensity to trigger stress granule (SG) formation resulting in global translation inhibition. Thus, our findings highlight the prominent role of translation control in development and function of the central nervous system and also provide molecular insight into how DHX30 dysfunction might cause a neurodevelopmental disorder., (Copyright © 2017 American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
47. Lipogranulomatous subconjunctival nodules: a novel presentation in Blau syndrome.
- Author
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Ahmad M, Hermanson ME, Enzenauer R, Palestine A, Lin C, Meeks N, and McCourt E
- Subjects
- Arthritis drug therapy, Arthritis genetics, Conjunctival Diseases drug therapy, Conjunctival Diseases genetics, Farber Lipogranulomatosis drug therapy, Farber Lipogranulomatosis genetics, Fluorometholone therapeutic use, Glucocorticoids therapeutic use, Humans, Infant, Male, Mutation, Nod2 Signaling Adaptor Protein genetics, Sarcoidosis, Synovitis drug therapy, Synovitis genetics, Uveitis drug therapy, Uveitis genetics, Exome Sequencing, Arthritis diagnosis, Conjunctival Diseases diagnosis, Farber Lipogranulomatosis diagnosis, Synovitis diagnosis, Uveitis diagnosis
- Abstract
Blau syndrome is an early-onset granulomatous disease known to affect the skin, joints, and eyes. We report a child with diffuse rash, arthritis, and subconjunctival nodules. Biopsy of the bulbar conjunctiva revealed noncaseating lipogranulomas that lead to a diagnosis of Blau syndrome. To our knowledge, noncaseating lipogranulomas of the conjunctiva have not been reported previously as a presenting finding in Blau syndrome. Although uveitis is the classic manifestation, it is important to broaden the awareness of other ocular signs, as these variations can aid in diagnosis., (Copyright © 2017 American Association for Pediatric Ophthalmology and Strabismus. Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
48. Juvenile myelomonocytic leukemia-associated variants are associated with neo-natal lethal Noonan syndrome.
- Author
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Mason-Suares H, Toledo D, Gekas J, Lafferty KA, Meeks N, Pacheco MC, Sharpe D, Mullen TE, and Lebo MS
- Subjects
- Female, Humans, Infant, Newborn, Noonan Syndrome diagnosis, Pregnancy, GTP Phosphohydrolases genetics, Germ-Line Mutation, Leukemia, Myelomonocytic, Juvenile genetics, Membrane Proteins genetics, Noonan Syndrome genetics, Protein Tyrosine Phosphatase, Non-Receptor Type 11 genetics
- Abstract
Gain-of-function variants in some RAS-MAPK pathway genes, including PTPN11 and NRAS, are associated with RASopathies and/or acquired hematological malignancies, most notably juvenile myelomonocytic leukemia (JMML). With rare exceptions, the spectrum of germline variants causing RASopathies does not overlap with the somatic variants identified in isolated JMML. Studies comparing these variants suggest a stronger gain-of-function activity in the JMML variants. As JMML variants have not been identified as germline defects and have a greater impact on protein function, it has been speculated that they would be embryonic lethal. Here we identified three variants, which have previously only been identified in isolated somatic JMML and other sporadic cancers, in four cases with a severe pre- or neo-natal lethal presentation of Noonan syndrome. These cases support the hypothesis that these stronger gain-of-function variants are rarely compatible with life.
- Published
- 2017
- Full Text
- View/download PDF
49. The phenotypic spectrum of Schaaf-Yang syndrome: 18 new affected individuals from 14 families.
- Author
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Fountain MD, Aten E, Cho MT, Juusola J, Walkiewicz MA, Ray JW, Xia F, Yang Y, Graham BH, Bacino CA, Potocki L, van Haeringen A, Ruivenkamp CA, Mancias P, Northrup H, Kukolich MK, Weiss MM, van Ravenswaaij-Arts CM, Mathijssen IB, Levesque S, Meeks N, Rosenfeld JA, Lemke D, Hamosh A, Lewis SK, Race S, Stewart LL, Hay B, Lewis AM, Guerreiro RL, Bras JT, Martins MP, Derksen-Lubsen G, Peeters E, Stumpel C, Stegmann S, Bok LA, Santen GW, and Schaaf CP
- Subjects
- Adolescent, Adult, Autism Spectrum Disorder physiopathology, Child, Child, Preschool, Chromosomes, Human, Pair 15, Developmental Disabilities physiopathology, Female, Gene Expression, Genomic Imprinting, Humans, Infant, Infant, Newborn, Intellectual Disability physiopathology, Male, Mutation, Phenotype, Prader-Willi Syndrome physiopathology, Autism Spectrum Disorder genetics, Developmental Disabilities genetics, Intellectual Disability genetics, Prader-Willi Syndrome genetics, Proteins genetics
- Abstract
Purpose: Truncating mutations in the maternally imprinted, paternally expressed gene MAGEL2, which is located in the Prader-Willi critical region 15q11-13, have recently been reported to cause Schaaf-Yang syndrome, a Prader-Willi-like disease that manifests as developmental delay/intellectual disability, hypotonia, feeding difficulties, and autism spectrum disorder. The causality of the reported variants in the context of the patients' phenotypes was questioned, as MAGEL2 whole-gene deletions seem to cause little or no clinical phenotype., Methods: Here we report a total of 18 newly identified individuals with Schaaf-Yang syndrome from 14 families, including 1 family with 3 individuals found to be affected with a truncating variant of MAGEL2, 11 individuals who are clinically affected but were not tested molecularly, and a presymptomatic fetal sibling carrying the pathogenic MAGEL2 variant., Results: All cases harbor truncating mutations of MAGEL2, and nucleotides c.1990-1996 arise as a mutational hotspot, with 10 individuals and 1 fetus harboring a c.1996dupC (p.Q666fs) mutation and 2 fetuses harboring a c.1996delC (p.Q666fs) mutation. The phenotypic spectrum of Schaaf-Yang syndrome ranges from fetal akinesia to neurobehavioral disease and contractures of the small finger joints., Conclusion: This study provides strong evidence for the pathogenicity of truncating mutations of the paternal allele of MAGEL2, refines the associated clinical phenotypes, and highlights implications for genetic counseling for affected families.Genet Med 19 1, 45-52.
- Published
- 2017
- Full Text
- View/download PDF
50. High Total Dissolved Solids Water Treatment by Charged Nanofiltration Membranes Relating to Power Plant Applications.
- Author
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Colburn AS, Meeks N, Weinman ST, and Bhattacharyya D
- Abstract
Selective desalination through nanofiltration (NF) is of great interest for many industrial applications including reuse of power plant scrubber wastewater and treatment of water containing high concentrations of TDS (total dissolved solids). This work seeks to understand the effect ion interactions at the membrane interface have on rejection and flux performance of charged NF membranes. NF membranes were also effective for low energy desalination of scrubber wastewater from Georgia Power Plant Bowen, composed primarily of Ca
2+ , Mg2+ , Cl- , and SO4 2- . As NF membranes have the capability for selective separations, 80% water recovery was achieved experimentally while maintaining an overall rejection of over 60% for Ca2+ and Cl- . The occurrence of CaSO4 precipitation at high water recovery was observed. The effect of precipitation on osmotic pressure and the effect of Cl- counterions on increasing gypsum solubility were explored for water recovery operation. This work expands on a previous work on the topics of desalination of multi-ionic solutions by incorporating the use of large scale membrane modules (0.59 m2 ) with several synthetic solutions as well as actual scrubber water containing precipitating elements, Ca2+ and SO4 2- . It was observed that the spiral wound membrane modules maintained a stable water permeability over the 144 day course of tests., Competing Interests: The authors declare no competing financial interest.- Published
- 2016
- Full Text
- View/download PDF
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