19 results on '"Tikhonova IR"'
Search Results
2. Opportunities for greenhouse gases emissions reduction in the biodegradable industrial waste management processes
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Tikhonova Irina, Grosheva Svetlana, Shlapak Sofya, Mikhailidi Dmitry, and Bubnov Andrey
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Environmental sciences ,GE1-350 - Abstract
The article assesses opportunities for mitigating greenhouse gas (GHG) emissions in the waste treatment sector concerning biodegradable industrial waste. Authors describe GHG emissions sources and ways of their reduction, paying the specific attention to the stages of the life cycle, where, according to the official data, the most significant GHG flows are formed. Methods of systematization and statistical generalization are applied for analysis. The specified work is based on the data from various sources, including National Reference Documents on the Best Available Techniques, statistical and scientific publications. Russian Reference Documents are known in the Eurasian Economic Union and often discussed as a possible background for the future research in the field on Best Available Techniques and resource efficiency enhancement. The main GHG emission sources during the waste generation, neutralization, utilization, recycling and storage are roughly described. Authors suggest relevant approaches to GHG emissions reduction available from the economic and environmental points of view.
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- 2024
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3. Mitigating greenhouse gases emissions in processing fossil carbon containing industrial waste
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Tikhonova Irina, Grosheva Svetlana, Shlapak Sofya, Averochkin Eugene, and Vartanyan Maria
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Environmental sciences ,GE1-350 - Abstract
The article assesses the Best Available Techniques for the methods of reduction of greenhouse gases (GHG) emissions in the waste treatment sector, that includes oil, plastic and rubber materials. The certain GHG emissions sources were shown and an attention is paid to the economic feasibility of specified methods in different places. It was shown, that for GHG mitigation policy, waste-management should be complied with the product life-cycle optimization, while recycling is considered as initially the best available method. The article is based on methods of scaling and statistical generalization. The data was obtained from official resources, including Reference Documents on the Best Available Techniques, National Inventory of GHG and from scientific publications. It was intended with full agreement, that resource efficiency enhancement relevantly should be in top priority of environmental and economic regulation.
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- 2024
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4. Synthesis and study of some physicochemical features of Co-Pt nanostructured system
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Zakharov Nikita, Tikhonova Irina, Popova Anna, Pugachev Valery, Dodonov Vadim, Prosvirin Igor, Krasheninin Viktor, and Zakharov Yuri
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Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
In the work by methods of XRD, TEM, SAED, XPS combined with mass-spectrometry of gaseous products, SAXS, and elemental analysis of samples the phase compositions and morphology of particles of nanostructured Co-Pt system synthesized by the method of reduction of hydrazine-hydrate aqueous solutions of precursors were studied (in the region rich in Pt for the first time). It was found that in the composition range up to ≈ 60 at. % Co. XRD-analysis of synthesized samples fixes as the only FCC phase of solid solution of Co in Pt, with the established upper limit of solubility %18±1 at. At the content of Co above the limit, along with it, the X-ray diffraction unregistered phases with the content of Co above the limit in solid solution are also formed. Their presence was confirmed by the SAXS method, and their metallic nature (not oxide-hydroxide) nature follows from the results of XRD, SAED. When FCC phase formed metal reduction process proceeded directly without cobalt hydroxides forming. According to results of XPS with the Ar-etching of samples there were internal platinum-rich sub-regions in Co-Pt nanoalloys.
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- 2024
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5. Visualization of the educational process of motor actions and improvement of motor skills
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Tikhonova Irina, Pigida Christina, Zhigaylova Larisa, Bliznuk Alexey, and Barcho Olga
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Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
In the modern learning environment visualization takes the leading place in the process of students knowledge formation based on the receiving of the constant information flow. The particular attention in the work is paid to the development and application of the techniques and means of educational material visualization. They allow to visualize perceptual images, ideas, movements, thoughts, theoretical reasoning and constructions as visual clarity. The studying process of motor actions, quality and speed of mental operations in the process of its studying, quality and speed of its reproduction depend on many parameters, characterizing the degree of symmetry-asymmetry development in the forms and functions development. The determining factor in the system of physical education and sports training of students visualization use is the feature of its implementation at each training stage. Means and methods of visualization can be modified according to the content, purpose and form of application.
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- 2020
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6. Multiomic analyses implicate a neurodevelopmental program in the pathogenesis of cerebral arachnoid cysts.
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Kundishora AJ, Allington G, McGee S, Mekbib KY, Gainullin V, Timberlake AT, Nelson-Williams C, Kiziltug E, Smith H, Ocken J, Shohfi J, Allocco A, Duy PQ, Elsamadicy AA, Dong W, Zhao S, Wang YC, Qureshi HM, DiLuna ML, Mane S, Tikhonova IR, Fu PY, Castaldi C, López-Giráldez F, Knight JR, Furey CG, Carter BS, Haider S, Moreno-De-Luca A, Alper SL, Gunel M, Millan F, Lifton RP, Torene RI, Jin SC, and Kahle KT
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- Humans, Animals, Mice, Brain diagnostic imaging, Exome genetics, Genetic Testing, Multiomics, Arachnoid Cysts diagnostic imaging, Arachnoid Cysts genetics
- Abstract
Cerebral arachnoid cysts (ACs) are one of the most common and poorly understood types of developmental brain lesion. To begin to elucidate AC pathogenesis, we performed an integrated analysis of 617 patient-parent (trio) exomes, 152,898 human brain and mouse meningeal single-cell RNA sequencing transcriptomes and natural language processing data of patient medical records. We found that damaging de novo variants (DNVs) were highly enriched in patients with ACs compared with healthy individuals (P = 1.57 × 10
-33 ). Seven genes harbored an exome-wide significant DNV burden. AC-associated genes were enriched for chromatin modifiers and converged in midgestational transcription networks essential for neural and meningeal development. Unsupervised clustering of patient phenotypes identified four AC subtypes and clinical severity correlated with the presence of a damaging DNV. These data provide insights into the coordinated regulation of brain and meningeal development and implicate epigenomic dysregulation due to DNVs in AC pathogenesis. Our results provide a preliminary indication that, in the appropriate clinical context, ACs may be considered radiographic harbingers of neurodevelopmental pathology warranting genetic testing and neurobehavioral follow-up. These data highlight the utility of a systems-level, multiomics approach to elucidate sporadic structural brain disease., (© 2023. The Author(s), under exclusive licence to Springer Nature America, Inc.)- Published
- 2023
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7. Rapid emergence of SARS-CoV-2 Omicron variant is associated with an infection advantage over Delta in vaccinated persons.
- Author
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Chaguza C, Coppi A, Earnest R, Ferguson D, Kerantzas N, Warner F, Young HP, Breban MI, Billig K, Koch RT, Pham K, Kalinich CC, Ott IM, Fauver JR, Hahn AM, Tikhonova IR, Castaldi C, De Kumar B, Pettker CM, Warren JL, Weinberger DM, Landry ML, Peaper DR, Schulz W, Vogels CBF, and Grubaugh ND
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- COVID-19 Vaccines, Hospitalization, Humans, COVID-19 epidemiology, SARS-CoV-2 genetics
- Abstract
Background: The SARS-CoV-2 Omicron variant became a global concern due to its rapid spread and displacement of the dominant Delta variant. We hypothesized that part of Omicron's rapid rise was based on its increased ability to cause infections in persons that are vaccinated compared to Delta., Methods: We analyzed nasal swab PCR tests for samples collected between December 12 and 16, 2021, in Connecticut when the proportion of Delta and Omicron variants was relatively equal. We used the spike gene target failure (SGTF) to classify probable Delta and Omicron infections. We fitted an exponential curve to the estimated infections to determine the doubling times for each variant. We compared the test positivity rates for each variant by vaccination status, number of doses, and vaccine manufacturer. Generalized linear models were used to assess factors associated with odds of infection with each variant among persons testing positive for SARS-CoV-2., Findings: For infections with high virus copies (Ct < 30) among vaccinated persons, we found higher odds that they were infected with Omicron compared to Delta, and that the odds increased with increased number of vaccine doses. Compared to unvaccinated persons, we found significant reduction in Delta positivity rates after two (43.4%-49.1%) and three vaccine doses (81.1%), while we only found a significant reduction in Omicron positivity rates after three doses (62.3%)., Conclusion: The rapid rise in Omicron infections was likely driven by Omicron's escape from vaccine-induced immunity., Funding: This work was supported by the Centers for Disease Control and Prevention (CDC)., Competing Interests: N.D.G. is a consultant for Tempus Labs and the National Basketball Association for work related to COVID-19 but is outside the submitted work. All other authors declare no competing interests., (© 2022 Elsevier Inc.)
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- 2022
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8. Combining genomic and epidemiological data to compare the transmissibility of SARS-CoV-2 variants Alpha and Iota.
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Petrone ME, Rothman JE, Breban MI, Ott IM, Russell A, Lasek-Nesselquist E, Badr H, Kelly K, Omerza G, Renzette N, Watkins AE, Kalinich CC, Alpert T, Brito AF, Earnest R, Tikhonova IR, Castaldi C, Kelly JP, Shudt M, Plitnick J, Schneider E, Murphy S, Neal C, Laszlo E, Altajar A, Pearson C, Muyombwe A, Downing R, Razeq J, Niccolai L, Wilson MS, Anderson ML, Wang J, Liu C, Hui P, Mane S, Taylor BP, Hanage WP, Landry ML, Peaper DR, Bilguvar K, Fauver JR, Vogels CBF, Gardner LM, Pitzer VE, St George K, Adams MD, and Grubaugh ND
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- Genomics, Humans, Pandemics, United States epidemiology, COVID-19 epidemiology, SARS-CoV-2 genetics
- Abstract
SARS-CoV-2 variants shaped the second year of the COVID-19 pandemic and the discourse around effective control measures. Evaluating the threat posed by a new variant is essential for adapting response efforts when community transmission is detected. In this study, we compare the dynamics of two variants, Alpha and Iota, by integrating genomic surveillance data to estimate the effective reproduction number (R
t ) of the variants. We use Connecticut, United States, in which Alpha and Iota co-circulated in 2021. We find that the Rt of these variants were up to 50% larger than that of other variants. We then use phylogeography to show that while both variants were introduced into Connecticut at comparable frequencies, clades that resulted from introductions of Alpha were larger than those resulting from Iota introductions. By monitoring the dynamics of individual variants throughout our study period, we demonstrate the importance of routine surveillance in the response to COVID-19., (© 2022. The Author(s).)- Published
- 2022
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9. Combining genomic and epidemiological data to compare the transmissibility of SARS-CoV-2 lineages.
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Petrone ME, Rothman JE, Breban MI, Ott IM, Russell A, Lasek-Nesselquist E, Kelly K, Omerza G, Renzette N, Watkins AE, Kalinich CC, Alpert T, Brito AF, Earnest R, Tikhonova IR, Castaldi C, Kelly JP, Shudt M, Plitnick J, Schneider E, Murphy S, Neal C, Laszlo E, Altajar A, Pearson C, Muyombwe A, Downing R, Razeq J, Niccolai L, Wilson MS, Anderson ML, Wang J, Liu C, Hui P, Mane S, Taylor BP, Hanage WP, Landry ML, Peaper DR, Bilguvar K, Fauver JR, Vogels CBF, Gardner LM, Pitzer VE, St George K, Adams MD, and Grubaugh ND
- Abstract
Emerging SARS-CoV-2 variants have shaped the second year of the COVID-19 pandemic and the public health discourse around effective control measures. Evaluating the public health threat posed by a new variant is essential for appropriately adapting response efforts when community transmission is detected. However, this assessment requires that a true comparison can be made between the new variant and its predecessors because factors other than the virus genotype may influence spread and transmission. In this study, we develop a framework that integrates genomic surveillance data to estimate the relative effective reproduction number (R
t ) of co-circulating lineages. We use Connecticut, a state in the northeastern United States in which the SARS-CoV-2 variants B.1.1.7 and B.1.526 co-circulated in early 2021, as a case study for implementing this framework. We find that the Rt of B.1.1.7 was 6-10% larger than that of B.1.526 in Connecticut in the midst of a COVID-19 vaccination campaign. To assess the generalizability of this framework, we apply it to genomic surveillance data from New York City and observe the same trend. Finally, we use discrete phylogeography to demonstrate that while both variants were introduced into Connecticut at comparable frequencies, clades that resulted from introductions of B.1.1.7 were larger than those resulting from B.1.526 introductions. Our framework, which uses open-source methods requiring minimal computational resources, may be used to monitor near real-time variant dynamics in a myriad of settings.- Published
- 2021
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10. Author Correction: Mutations disrupting neuritogenesis genes confer risk for cerebral palsy.
- Author
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Jin SC, Lewis SA, Bakhtiari S, Zeng X, Sierant MC, Shetty S, Nordlie SM, Elie A, Corbett MA, Norton BY, van Eyk CL, Haider S, Guida BS, Magee H, Liu J, Pastore S, Vincent JB, Brunstrom-Hernandez J, Papavasileiou A, Fahey MC, Berry JG, Harper K, Zhou C, Zhang J, Li B, Zhao H, Heim J, Webber DL, Frank MSB, Xia L, Xu Y, Zhu D, Zhang B, Sheth AH, Knight JR, Castaldi C, Tikhonova IR, López-Giráldez F, Keren B, Whalen S, Buratti J, Doummar D, Cho M, Retterer K, Millan F, Wang Y, Waugh JL, Rodan L, Cohen JS, Fatemi A, Lin AE, Phillips JP, Feyma T, MacLennan SC, Vaughan S, Crompton KE, Reid SM, Reddihough DS, Shang Q, Gao C, Novak I, Badawi N, Wilson YA, McIntyre SJ, Mane SM, Wang X, Amor DJ, Zarnescu DC, Lu Q, Xing Q, Zhu C, Bilguvar K, Padilla-Lopez S, Lifton RP, Gecz J, MacLennan AH, and Kruer MC
- Published
- 2021
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11. Exome sequencing implicates genetic disruption of prenatal neuro-gliogenesis in sporadic congenital hydrocephalus.
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Jin SC, Dong W, Kundishora AJ, Panchagnula S, Moreno-De-Luca A, Furey CG, Allocco AA, Walker RL, Nelson-Williams C, Smith H, Dunbar A, Conine S, Lu Q, Zeng X, Sierant MC, Knight JR, Sullivan W, Duy PQ, DeSpenza T, Reeves BC, Karimy JK, Marlier A, Castaldi C, Tikhonova IR, Li B, Peña HP, Broach JR, Kabachelor EM, Ssenyonga P, Hehnly C, Ge L, Keren B, Timberlake AT, Goto J, Mangano FT, Johnston JM, Butler WE, Warf BC, Smith ER, Schiff SJ, Limbrick DD Jr, Heuer G, Jackson EM, Iskandar BJ, Mane S, Haider S, Guclu B, Bayri Y, Sahin Y, Duncan CC, Apuzzo MLJ, DiLuna ML, Hoffman EJ, Sestan N, Ment LR, Alper SL, Bilguvar K, Geschwind DH, Günel M, Lifton RP, and Kahle KT
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- Brain diagnostic imaging, Brain pathology, Cerebral Ventricles diagnostic imaging, Cerebral Ventricles pathology, Exome genetics, Female, Humans, Hydrocephalus cerebrospinal fluid, Hydrocephalus diagnostic imaging, Hydrocephalus pathology, Male, Mutation genetics, Neural Stem Cells metabolism, Neural Stem Cells pathology, Neuroglia metabolism, Neuroglia pathology, Transcription Factors genetics, Tripartite Motif Proteins genetics, Ubiquitin-Protein Ligases genetics, Exome Sequencing, Cerebral Ventricles metabolism, Genetic Predisposition to Disease, Hydrocephalus genetics, Neurogenesis genetics
- Abstract
Congenital hydrocephalus (CH), characterized by enlarged brain ventricles, is considered a disease of excessive cerebrospinal fluid (CSF) accumulation and thereby treated with neurosurgical CSF diversion with high morbidity and failure rates. The poor neurodevelopmental outcomes and persistence of ventriculomegaly in some post-surgical patients highlight our limited knowledge of disease mechanisms. Through whole-exome sequencing of 381 patients (232 trios) with sporadic, neurosurgically treated CH, we found that damaging de novo mutations account for >17% of cases, with five different genes exhibiting a significant de novo mutation burden. In all, rare, damaging mutations with large effect contributed to ~22% of sporadic CH cases. Multiple CH genes are key regulators of neural stem cell biology and converge in human transcriptional networks and cell types pertinent for fetal neuro-gliogenesis. These data implicate genetic disruption of early brain development, not impaired CSF dynamics, as the primary pathomechanism of a significant number of patients with sporadic CH.
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- 2020
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12. Mutations disrupting neuritogenesis genes confer risk for cerebral palsy.
- Author
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Jin SC, Lewis SA, Bakhtiari S, Zeng X, Sierant MC, Shetty S, Nordlie SM, Elie A, Corbett MA, Norton BY, van Eyk CL, Haider S, Guida BS, Magee H, Liu J, Pastore S, Vincent JB, Brunstrom-Hernandez J, Papavasileiou A, Fahey MC, Berry JG, Harper K, Zhou C, Zhang J, Li B, Zhao H, Heim J, Webber DL, Frank MSB, Xia L, Xu Y, Zhu D, Zhang B, Sheth AH, Knight JR, Castaldi C, Tikhonova IR, López-Giráldez F, Keren B, Whalen S, Buratti J, Doummar D, Cho M, Retterer K, Millan F, Wang Y, Waugh JL, Rodan L, Cohen JS, Fatemi A, Lin AE, Phillips JP, Feyma T, MacLennan SC, Vaughan S, Crompton KE, Reid SM, Reddihough DS, Shang Q, Gao C, Novak I, Badawi N, Wilson YA, McIntyre SJ, Mane SM, Wang X, Amor DJ, Zarnescu DC, Lu Q, Xing Q, Zhu C, Bilguvar K, Padilla-Lopez S, Lifton RP, Gecz J, MacLennan AH, and Kruer MC
- Subjects
- Animals, Cerebral Palsy pathology, Cyclin D genetics, Cytoskeleton genetics, Drosophila genetics, Exome genetics, Extracellular Matrix genetics, Female, Focal Adhesions genetics, Genetic Predisposition to Disease, Genome, Human genetics, Humans, Male, Mutation genetics, Neurites metabolism, Neurites pathology, Risk Factors, Sequence Analysis, DNA, Signal Transduction genetics, Exome Sequencing, rhoB GTP-Binding Protein genetics, Cerebral Palsy genetics, F-Box Proteins genetics, Tubulin genetics, Tumor Suppressor Proteins genetics, beta Catenin genetics
- Abstract
In addition to commonly associated environmental factors, genomic factors may cause cerebral palsy. We performed whole-exome sequencing of 250 parent-offspring trios, and observed enrichment of damaging de novo mutations in cerebral palsy cases. Eight genes had multiple damaging de novo mutations; of these, two (TUBA1A and CTNNB1) met genome-wide significance. We identified two novel monogenic etiologies, FBXO31 and RHOB, and showed that the RHOB mutation enhances active-state Rho effector binding while the FBXO31 mutation diminishes cyclin D levels. Candidate cerebral palsy risk genes overlapped with neurodevelopmental disorder genes. Network analyses identified enrichment of Rho GTPase, extracellular matrix, focal adhesion and cytoskeleton pathways. Cerebral palsy risk genes in enriched pathways were shown to regulate neuromotor function in a Drosophila reverse genetics screen. We estimate that 14% of cases could be attributed to an excess of damaging de novo or recessive variants. These findings provide evidence for genetically mediated dysregulation of early neuronal connectivity in cerebral palsy.
- Published
- 2020
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13. Mutations in Chromatin Modifier and Ephrin Signaling Genes in Vein of Galen Malformation.
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Duran D, Zeng X, Jin SC, Choi J, Nelson-Williams C, Yatsula B, Gaillard J, Furey CG, Lu Q, Timberlake AT, Dong W, Sorscher MA, Loring E, Klein J, Allocco A, Hunt A, Conine S, Karimy JK, Youngblood MW, Zhang J, DiLuna ML, Matouk CC, Mane S, Tikhonova IR, Castaldi C, López-Giráldez F, Knight J, Haider S, Soban M, Alper SL, Komiyama M, Ducruet AF, Zabramski JM, Dardik A, Walcott BP, Stapleton CJ, Aagaard-Kienitz B, Rodesch G, Jackson E, Smith ER, Orbach DB, Berenstein A, Bilguvar K, Vikkula M, Gunel M, Lifton RP, and Kahle KT
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- Ephrins metabolism, Female, Humans, Male, Membrane Glycoproteins genetics, Metalloendopeptidases genetics, Pedigree, Penetrance, Receptor, EphB4 genetics, Signal Transduction, Vein of Galen Malformations pathology, Chromatin Assembly and Disassembly genetics, Mutation, Vein of Galen Malformations genetics
- Abstract
Normal vascular development includes the formation and specification of arteries, veins, and intervening capillaries. Vein of Galen malformations (VOGMs) are among the most common and severe neonatal brain arterio-venous malformations, shunting arterial blood into the brain's deep venous system through aberrant direct connections. Exome sequencing of 55 VOGM probands, including 52 parent-offspring trios, revealed enrichment of rare damaging de novo mutations in chromatin modifier genes that play essential roles in brain and vascular development. Other VOGM probands harbored rare inherited damaging mutations in Ephrin signaling genes, including a genome-wide significant mutation burden in EPHB4. Inherited mutations showed incomplete penetrance and variable expressivity, with mutation carriers often exhibiting cutaneous vascular abnormalities, suggesting a two-hit mechanism. The identified mutations collectively account for ∼30% of studied VOGM cases. These findings provide insight into disease biology and may have clinical implications for risk assessment., (Copyright © 2018 Elsevier Inc. All rights reserved.)
- Published
- 2019
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14. De novo mutations in histone-modifying genes in congenital heart disease.
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Zaidi S, Choi M, Wakimoto H, Ma L, Jiang J, Overton JD, Romano-Adesman A, Bjornson RD, Breitbart RE, Brown KK, Carriero NJ, Cheung YH, Deanfield J, DePalma S, Fakhro KA, Glessner J, Hakonarson H, Italia MJ, Kaltman JR, Kaski J, Kim R, Kline JK, Lee T, Leipzig J, Lopez A, Mane SM, Mitchell LE, Newburger JW, Parfenov M, Pe'er I, Porter G, Roberts AE, Sachidanandam R, Sanders SJ, Seiden HS, State MW, Subramanian S, Tikhonova IR, Wang W, Warburton D, White PS, Williams IA, Zhao H, Seidman JG, Brueckner M, Chung WK, Gelb BD, Goldmuntz E, Seidman CE, and Lifton RP
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- Adult, Case-Control Studies, Child, Chromatin chemistry, Chromatin metabolism, DNA Mutational Analysis, Enhancer Elements, Genetic genetics, Exome genetics, Female, Genes, Developmental genetics, Heart Diseases metabolism, Histones chemistry, Humans, Lysine chemistry, Lysine metabolism, Male, Methylation, Mutation, Odds Ratio, Promoter Regions, Genetic genetics, Heart Diseases congenital, Heart Diseases genetics, Histones metabolism
- Abstract
Congenital heart disease (CHD) is the most frequent birth defect, affecting 0.8% of live births. Many cases occur sporadically and impair reproductive fitness, suggesting a role for de novo mutations. Here we compare the incidence of de novo mutations in 362 severe CHD cases and 264 controls by analysing exome sequencing of parent-offspring trios. CHD cases show a significant excess of protein-altering de novo mutations in genes expressed in the developing heart, with an odds ratio of 7.5 for damaging (premature termination, frameshift, splice site) mutations. Similar odds ratios are seen across the main classes of severe CHD. We find a marked excess of de novo mutations in genes involved in the production, removal or reading of histone 3 lysine 4 (H3K4) methylation, or ubiquitination of H2BK120, which is required for H3K4 methylation. There are also two de novo mutations in SMAD2, which regulates H3K27 methylation in the embryonic left-right organizer. The combination of both activating (H3K4 methylation) and inactivating (H3K27 methylation) chromatin marks characterizes 'poised' promoters and enhancers, which regulate expression of key developmental genes. These findings implicate de novo point mutations in several hundreds of genes that collectively contribute to approximately 10% of severe CHD.
- Published
- 2013
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15. Genetic diagnosis of neuroacanthocytosis disorders using exome sequencing.
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Walker RH, Schulz VP, Tikhonova IR, Mahajan MC, Mane S, Arroyo Muniz M, and Gallagher PG
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- Adult, Female, Genetic Heterogeneity, Humans, Male, Middle Aged, Sequence Analysis, DNA, Exome genetics, Genetic Testing methods, Mutation genetics, Neuroacanthocytosis diagnosis, Neuroacanthocytosis genetics, Vesicular Transport Proteins genetics
- Abstract
Neuroacanthocytoses are neurodegenerative disorders marked by phenotypic and genetic heterogeneity. There are several associated genetic loci, and many defects, including gene deletions and insertions, and missense, nonsense, and splicing mutations, have been found spread over hundreds of kilobases of genomic DNA. In some cases, specific diagnosis is unclear, particularly in the early stages of disease or when there is an atypical presentation. Determination of the precise genetic defect allows assignment of the diagnosis and permits carrier detection and genetic counseling. The objective of this report was to utilize exome sequencing for genetic diagnosis in the neuroacanthocytosis syndromes. Genomic DNA from 2 patients with clinical features of chorea-acanthocytosis was subjected to targeted exon capture. Captured DNA was subjected to ultrahigh throughput next-generation sequencing. Sequencing data were assembled, filtered against known human variant genetic databases, and results were analyzed. Both patients were compound heterozygotes for mutations in the VPS13A gene, the gene associated with chorea-acanthocytosis. Patient 1 had a 4-bp deletion that removes the 5' donor splice site of exon 58 and a nucleotide substitution that disrupts the 5' donor splice site of exon 70. Patient 2 had a dinucleotide deletion in exon 16 and a dinucleotide insertion in exon 33. No mutations were identified in the XK, PANK2, or JPH3 gene loci. Exome sequencing is a valuable diagnostic tool in the neuroacanthocytosis syndromes. These studies may provide a better understanding of the function of the associated proteins and provide insight into the pathogenesis of these disorders., (Copyright © 2011 Movement Disorder Society.)
- Published
- 2012
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16. Mutations in kelch-like 3 and cullin 3 cause hypertension and electrolyte abnormalities.
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Boyden LM, Choi M, Choate KA, Nelson-Williams CJ, Farhi A, Toka HR, Tikhonova IR, Bjornson R, Mane SM, Colussi G, Lebel M, Gordon RD, Semmekrot BA, Poujol A, Välimäki MJ, De Ferrari ME, Sanjad SA, Gutkin M, Karet FE, Tucci JR, Stockigt JR, Keppler-Noreuil KM, Porter CC, Anand SK, Whiteford ML, Davis ID, Dewar SB, Bettinelli A, Fadrowski JJ, Belsha CW, Hunley TE, Nelson RD, Trachtman H, Cole TR, Pinsk M, Bockenhauer D, Shenoy M, Vaidyanathan P, Foreman JW, Rasoulpour M, Thameem F, Al-Shahrouri HZ, Radhakrishnan J, Gharavi AG, Goilav B, and Lifton RP
- Subjects
- Adaptor Proteins, Signal Transducing, Amino Acid Sequence, Animals, Base Sequence, Blood Pressure genetics, Carrier Proteins chemistry, Cohort Studies, Cullin Proteins chemistry, Electrolytes, Exons genetics, Female, Gene Expression Profiling, Genes, Dominant genetics, Genes, Recessive genetics, Genotype, Homeostasis genetics, Humans, Hydrogen-Ion Concentration, Hypertension complications, Hypertension physiopathology, Male, Mice, Microfilament Proteins, Models, Molecular, Molecular Sequence Data, Phenotype, Potassium metabolism, Pseudohypoaldosteronism complications, Pseudohypoaldosteronism physiopathology, Sodium Chloride metabolism, Water-Electrolyte Imbalance complications, Water-Electrolyte Imbalance physiopathology, Carrier Proteins genetics, Cullin Proteins genetics, Hypertension genetics, Mutation genetics, Pseudohypoaldosteronism genetics, Water-Electrolyte Imbalance genetics
- Abstract
Hypertension affects one billion people and is a principal reversible risk factor for cardiovascular disease. Pseudohypoaldosteronism type II (PHAII), a rare Mendelian syndrome featuring hypertension, hyperkalaemia and metabolic acidosis, has revealed previously unrecognized physiology orchestrating the balance between renal salt reabsorption and K(+) and H(+) excretion. Here we used exome sequencing to identify mutations in kelch-like 3 (KLHL3) or cullin 3 (CUL3) in PHAII patients from 41 unrelated families. KLHL3 mutations are either recessive or dominant, whereas CUL3 mutations are dominant and predominantly de novo. CUL3 and BTB-domain-containing kelch proteins such as KLHL3 are components of cullin-RING E3 ligase complexes that ubiquitinate substrates bound to kelch propeller domains. Dominant KLHL3 mutations are clustered in short segments within the kelch propeller and BTB domains implicated in substrate and cullin binding, respectively. Diverse CUL3 mutations all result in skipping of exon 9, producing an in-frame deletion. Because dominant KLHL3 and CUL3 mutations both phenocopy recessive loss-of-function KLHL3 mutations, they may abrogate ubiquitination of KLHL3 substrates. Disease features are reversed by thiazide diuretics, which inhibit the Na-Cl cotransporter in the distal nephron of the kidney; KLHL3 and CUL3 are expressed in this location, suggesting a mechanistic link between KLHL3 and CUL3 mutations, increased Na-Cl reabsorption, and disease pathogenesis. These findings demonstrate the utility of exome sequencing in disease gene identification despite the combined complexities of locus heterogeneity, mixed models of transmission and frequent de novo mutation, and establish a fundamental role for KLHL3 and CUL3 in blood pressure, K(+) and pH homeostasis.
- Published
- 2012
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17. Genetic diagnosis by whole exome capture and massively parallel DNA sequencing.
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Choi M, Scholl UI, Ji W, Liu T, Tikhonova IR, Zumbo P, Nayir A, Bakkaloğlu A, Ozen S, Sanjad S, Nelson-Williams C, Farhi A, Mane S, and Lifton RP
- Subjects
- Antiporters genetics, Base Sequence, Chloride-Bicarbonate Antiporters, Chlorides, Computational Biology, Diarrhea genetics, Genomics methods, Humans, Molecular Sequence Data, Mutation, Missense genetics, Sulfate Transporters, Algorithms, Genetic Diseases, Inborn genetics, Molecular Diagnostic Techniques methods, Open Reading Frames genetics, Sequence Analysis, DNA methods
- Abstract
Protein coding genes constitute only approximately 1% of the human genome but harbor 85% of the mutations with large effects on disease-related traits. Therefore, efficient strategies for selectively sequencing complete coding regions (i.e., "whole exome") have the potential to contribute to the understanding of rare and common human diseases. Here we report a method for whole-exome sequencing coupling Roche/NimbleGen whole exome arrays to the Illumina DNA sequencing platform. We demonstrate the ability to capture approximately 95% of the targeted coding sequences with high sensitivity and specificity for detection of homozygous and heterozygous variants. We illustrate the utility of this approach by making an unanticipated genetic diagnosis of congenital chloride diarrhea in a patient referred with a suspected diagnosis of Bartter syndrome, a renal salt-wasting disease. The molecular diagnosis was based on the finding of a homozygous missense D652N mutation at a position in SLC26A3 (the known congenital chloride diarrhea locus) that is virtually completely conserved in orthologues and paralogues from invertebrates to humans, and clinical follow-up confirmed the diagnosis. To our knowledge, whole-exome (or genome) sequencing has not previously been used to make a genetic diagnosis. Five additional patients suspected to have Bartter syndrome but who did not have mutations in known genes for this disease had homozygous deleterious mutations in SLC26A3. These results demonstrate the clinical utility of whole-exome sequencing and have implications for disease gene discovery and clinical diagnosis.
- Published
- 2009
- Full Text
- View/download PDF
18. Keck Foundation Biotechnology Resource Laboratory, Yale University.
- Author
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Stone KL, Bjornson RD, Blasko GG, Bruce C, Cofrancesco R, Carriero NJ, Colangelo CM, Crawford JK, Crawford JM, daSilva NC, Deluca JD, Elliott JI, Elliott MM, Flory PJ, Folta-Stogniew EJ, Gulcicek E, Kong Y, Lam TT, Lee JY, Lin A, LoPresti MB, Mane SM, McMurray WJ, Tikhonova IR, Westman S, Williams NA, Wu TL, Hongyu Z, and Williams KR
- Subjects
- Connecticut, Biotechnology trends, Chromosome Mapping trends, Computational Biology trends, Foundations trends, Genomics trends, Laboratories trends, Universities trends
- Published
- 2007
19. Performance comparison of one-color and two-color platforms within the MicroArray Quality Control (MAQC) project.
- Author
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Patterson TA, Lobenhofer EK, Fulmer-Smentek SB, Collins PJ, Chu TM, Bao W, Fang H, Kawasaki ES, Hager J, Tikhonova IR, Walker SJ, Zhang L, Hurban P, de Longueville F, Fuscoe JC, Tong W, Shi L, and Wolfinger RD
- Subjects
- Equipment Design, Equipment Failure Analysis, Gene Expression Profiling methods, Microscopy, Fluorescence, Multiphoton methods, Quality Control, Reproducibility of Results, Sensitivity and Specificity, Spectrometry, Fluorescence methods, United States, Gene Expression Profiling instrumentation, In Situ Hybridization, Fluorescence instrumentation, Microscopy, Fluorescence, Multiphoton instrumentation, Oligonucleotide Array Sequence Analysis instrumentation, Quality Assurance, Health Care methods, Spectrometry, Fluorescence instrumentation
- Abstract
Microarray-based expression profiling experiments typically use either a one-color or a two-color design to measure mRNA abundance. The validity of each approach has been amply demonstrated. Here we provide a simultaneous comparison of results from one- and two-color labeling designs, using two independent RNA samples from the Microarray Quality Control (MAQC) project, tested on each of three different microarray platforms. The data were evaluated in terms of reproducibility, specificity, sensitivity and accuracy to determine if the two approaches provide comparable results. For each of the three microarray platforms tested, the results show good agreement with high correlation coefficients and high concordance of differentially expressed gene lists within each platform. Cumulatively, these comparisons indicate that data quality is essentially equivalent between the one- and two-color approaches and strongly suggest that this variable need not be a primary factor in decisions regarding experimental microarray design.
- Published
- 2006
- Full Text
- View/download PDF
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