1
|
Gerbaldo F, Sonder E, Fischer V, Frei S, Wang J, Gapp K, Robinson MD, Germain PL. On the identification of differentially-active transcription factors from ATAC-seq data. bioRxiv 2024:2024.03.06.583825. [PMID: 38496482 PMCID: PMC10942475 DOI: 10.1101/2024.03.06.583825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
ATAC-seq has emerged as a rich epigenome profiling technique, and is commonly used to identify Transcription Factors (TFs) underlying given phenomena. A number of methods can be used to identify differentially-active TFs through the accessibility of their DNA-binding motif, however little is known on the best approaches for doing so. Here we benchmark several such methods using a combination of curated datasets with various forms of short-term perturbations on known TFs, as well as semi-simulations. We include both methods specifically designed for this type of data as well as some that can be repurposed for it. We also investigate variations to these methods, and identify three particularly promising approaches (chromVAR-limma with critical adjustments, monaLisa and a combination of GC smooth quantile normalization and multivariate modeling). We further investigate the specific use of nucleosome-free fragments, the combination of top methods, and the impact of technical variation. Finally, we illustrate the use of the top methods on a novel dataset to characterize the impact on DNA accessibility of TRAnscription Factor TArgeting Chimeras (TRAFTAC), which can deplete TFs - in our case NFkB - at the protein level.
Collapse
Affiliation(s)
- Felix Gerbaldo
- Computational Neurogenomics, D-HEST Institute for Neurosciences, Zürich, Switzerland
- Systems Neuroscience, D-HEST Institute for Neurosciences, Zürich, Switzerland
| | - Emanuel Sonder
- Computational Neurogenomics, D-HEST Institute for Neurosciences, Zürich, Switzerland
- Systems Neuroscience, D-HEST Institute for Neurosciences, Zürich, Switzerland
- Department of Molecular Life Sciences, University of Zürich, Zürich, Switzerland
- SIB Swiss Institute of Bioinformatics, University of Zurich, Switzerland
| | - Vincent Fischer
- Epigenetics and Neuroendocrinology, D-HEST Institute for Neurosciences, Zürich, Switzerland
| | - Selina Frei
- Epigenetics and Neuroendocrinology, D-HEST Institute for Neurosciences, Zürich, Switzerland
| | - Jiayi Wang
- Department of Molecular Life Sciences, University of Zürich, Zürich, Switzerland
| | - Katharina Gapp
- Epigenetics and Neuroendocrinology, D-HEST Institute for Neurosciences, Zürich, Switzerland
| | - Mark D Robinson
- Department of Molecular Life Sciences, University of Zürich, Zürich, Switzerland
- SIB Swiss Institute of Bioinformatics, University of Zurich, Switzerland
| | - Pierre-Luc Germain
- Computational Neurogenomics, D-HEST Institute for Neurosciences, Zürich, Switzerland
- Department of Molecular Life Sciences, University of Zürich, Zürich, Switzerland
- SIB Swiss Institute of Bioinformatics, University of Zurich, Switzerland
| |
Collapse
|
2
|
Sajibu S, Sonder E, Tiwari A, Orjuela S, Parker HR, Frans OT, Gubler C, Marra G, Robinson MD. Validation of hypermethylated DNA regions found in colorectal cancers as potential aging-independent biomarkers of precancerous colorectal lesions. BMC Cancer 2023; 23:998. [PMID: 37853362 PMCID: PMC10585861 DOI: 10.1186/s12885-023-11487-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 10/06/2023] [Indexed: 10/20/2023] Open
Abstract
BACKGROUND We previously identified 16,772 colorectal cancer-associated hypermethylated DNA regions that were also detectable in precancerous colorectal lesions (preCRCs) and unrelated to normal mucosal aging. We have now conducted a study to validate 990 of these differentially methylated DNA regions (DMRs) in a new series of preCRCs. METHODS We used targeted bisulfite sequencing to validate these 990 potential biomarkers in 59 preCRC tissue samples (41 conventional adenomas, 18 sessile serrated lesions), each with a patient-matched normal mucosal sample. Based on differential DNA methylation tests, a panel of candidate DMRs was chosen on a subset of our cohort and then validated on the remaining part of our cohort and two publicly available datasets with respect to their stratifying potential between preCRCs and normal mucosa. RESULTS Strong statistical significance for the difference in methylation levels was observed across the full set of 990 investigated DMRs. From these, a selected candidate panel of 30 DMRs correctly identified 58/59 tumors (area under the receiver operating curve: 0.998). CONCLUSIONS These validated DNA hypermethylation markers can be exploited to develop more accurate noninvasive colorectal tumor screening assays.
Collapse
Affiliation(s)
- Sija Sajibu
- Institute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland
| | - Emanuel Sonder
- Department of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland
- Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Amit Tiwari
- Institute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland
| | - Stephany Orjuela
- Institute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland
| | - Hannah R Parker
- Institute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland
| | | | - Christoph Gubler
- Division of Gastroenterology, Triemli Hospital, Zurich, Switzerland
| | - Giancarlo Marra
- Institute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland
| | - Mark D Robinson
- Department of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, Zurich, 8057, Switzerland.
- SIB Swiss Institute of Bioinformatics, Vaud, Switzerland.
| |
Collapse
|
3
|
Sonrel A, Luetge A, Soneson C, Mallona I, Germain PL, Knyazev S, Gilis J, Gerber R, Seurinck R, Paul D, Sonder E, Crowell HL, Fanaswala I, Al-Ajami A, Heidari E, Schmeing S, Milosavljevic S, Saeys Y, Mangul S, Robinson MD. Meta-analysis of (single-cell method) benchmarks reveals the need for extensibility and interoperability. Genome Biol 2023; 24:119. [PMID: 37198712 DOI: 10.1186/s13059-023-02962-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 05/06/2023] [Indexed: 05/19/2023] Open
Abstract
Computational methods represent the lifeblood of modern molecular biology. Benchmarking is important for all methods, but with a focus here on computational methods, benchmarking is critical to dissect important steps of analysis pipelines, formally assess performance across common situations as well as edge cases, and ultimately guide users on what tools to use. Benchmarking can also be important for community building and advancing methods in a principled way. We conducted a meta-analysis of recent single-cell benchmarks to summarize the scope, extensibility, and neutrality, as well as technical features and whether best practices in open data and reproducible research were followed. The results highlight that while benchmarks often make code available and are in principle reproducible, they remain difficult to extend, for example, as new methods and new ways to assess methods emerge. In addition, embracing containerization and workflow systems would enhance reusability of intermediate benchmarking results, thus also driving wider adoption.
Collapse
Affiliation(s)
- Anthony Sonrel
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Almut Luetge
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Charlotte Soneson
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | - Izaskun Mallona
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
- Department of Quantitative Biomedicine, University of Zurich, Zurich, Switzerland
| | - Pierre-Luc Germain
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
- D-HEST Institute for Neuroscience, ETH Zürich, Zurich, Switzerland
| | - Sergey Knyazev
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
- Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, CA, USA
| | - Jeroen Gilis
- Department of Applied Mathematics, Computer Science & Statistics, Ghent University, Ghent, Belgium
- Data Mining and Modeling for Biomedicine, VIB Center for Inflammation Research, Ghent, Belgium
- Bioinformatics Institute Ghent, Ghent University, Ghent, Belgium
| | - Reto Gerber
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Ruth Seurinck
- Department of Applied Mathematics, Computer Science & Statistics, Ghent University, Ghent, Belgium
- Data Mining and Modeling for Biomedicine, VIB Center for Inflammation Research, Ghent, Belgium
| | - Dominique Paul
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - Emanuel Sonder
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
- D-HEST Institute for Neuroscience, ETH Zürich, Zurich, Switzerland
| | - Helena L Crowell
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Imran Fanaswala
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Ahmad Al-Ajami
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Elyas Heidari
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Stephan Schmeing
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Stefan Milosavljevic
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - Yvan Saeys
- Department of Applied Mathematics, Computer Science & Statistics, Ghent University, Ghent, Belgium
- Data Mining and Modeling for Biomedicine, VIB Center for Inflammation Research, Ghent, Belgium
| | - Serghei Mangul
- Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, CA, USA
| | - Mark D Robinson
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland.
| |
Collapse
|
4
|
Abstract
AbstractModern varistors are made of polycrystalline ZnO, doped to create Schottky-like barriers at the grain boundaries. To allow the study of tailored single barrier junctions, we have implanted ZnO crystals with Bi, Sb and transition metals. The electrical properties and the distribution of Bi and Sb were measured in the implanted crystals as a function of annealing temperature. After implantation and before heating, no barriers can be observed. After heating to 600–800°C, a high voltage (insulating) barrier is created. Heating to above 1000°C produces a 2-1/2 Volt barrier with high nonlinearity. The temperatures at which these barriers appear correspond, respectively, to temperatures at which motion of Sb and Bi first can be observed by ion backscattering techniques, and at which these elements diffuse freely.
Collapse
|
5
|
Jenks GH, Sonder E, Bopp CD, Walton JR, Lindenbaum S. Reaction products and stored energy released from irradiated sodium chloride by dissolution and by heating. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100576a005] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
6
|
Desnica U, Gamulin O, Tonejc A, Ivanda M, White C, Sonder E, Zuhr R. CdS nanocrystals formed in SiO2 substrates by ion implantation. Materials Science and Engineering: C 2001. [DOI: 10.1016/s0928-4931(01)00262-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
7
|
Hughes AE, Pells GP, Sonder E. Symmetry assignments of one-phonon sidebands in the emission spectrum of the F+centre in calcium oxide. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/5/6/013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
8
|
Sonder E, Ackermann M, McCullough KC, Kihm U. Inactivation of foot and mouth disease virus in skimmed milk with propionic acid, citric acid and hydrogen peroxide. REV SCI TECH OIE 1990; 9:1139-55. [PMID: 1966751 DOI: 10.20506/rst.9.4.528] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In order to protect farm animals from infections such as foot and mouth disease (FMD) and tuberculosis, the pasteurisation of milk and milk products designated for the feeding of animals is compulsory in Switzerland. Nowadays, milk products are often treated chemically with acids or with hydrogen peroxide in order to keep bacterial contamination low. The capacity of these chemical treatments to inactivate FMD virus in skimmed milk within 6 h at 5 degrees C was tested in this study. The results indicated that the addition of 0.1%-0.3% of consumable acids, such as citric acid or propionic acid, could not guarantee the complete inactivation of FMD virus in skimmed milk. Similar results were obtained both with FMD virus deliberately added to skimmed milk and with skimmed milk obtained from naturally infected cows. Hydrogen peroxide in concentrations of 0.1%-0.3% was also an ineffective means of controlling the risk of FMD virus transmission from contaminated milk.
Collapse
Affiliation(s)
- E Sonder
- Institut für Viruskrankheiten und Immunprophylaxe, Basel, Switzerland
| | | | | | | |
Collapse
|
9
|
Sonder E, Chakoumakos BC, Sales BC. Effects of oxygen and strontium vacancies on the superconductivity of single crystals of Bi2Sr2-xCuO6-y. Phys Rev B Condens Matter 1989; 40:6872-6877. [PMID: 9991063 DOI: 10.1103/physrevb.40.6872] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
10
|
Martinelli JR, Sonder E, Weeks RA, Zuhr RA. Mobility of cations in magnesium aluminate spinel. Phys Rev B Condens Matter 1986; 33:5698-5701. [PMID: 9939081 DOI: 10.1103/physrevb.33.5698] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
11
|
Martinelli JR, Sonder E, Weeks RA, Zuhr RA. Measurement of cation diffusion in magnesium oxide by determining the Mg 18O buildup produced by an electric field. Phys Rev B Condens Matter 1985; 32:6756-6763. [PMID: 9936786 DOI: 10.1103/physrevb.32.6756] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
12
|
|
13
|
Abstract
A high frequency modulation method utilizing a photoelastic polarization modulator for the measurement of optical birefringence is described and discussed. Although the apparatus has the high sensitivity required to measure very small retardations, the accurate measurement of larger retardations is emphasized and a particularly simple null detection technique for such measurements is described. Results obtained for some common uniaxial crystals are presented and compared with previously obtained results.
Collapse
|
14
|
|
15
|
Sonder E, Bassignani G, Camagni P. Impurities and Secondary Reactions in Radiation Defect Production at Liquid-Nitrogen Temperature in Alkali Halides. ACTA ACUST UNITED AC 1969. [DOI: 10.1103/physrev.180.882] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
16
|
|
17
|
|
18
|
Sonder E, Sibley WA, Rowe JE, Nelson CM. Some Properties of Defects Produced by Ionizing Radiation in KCl between 80 and 300°K. ACTA ACUST UNITED AC 1967. [DOI: 10.1103/physrev.153.1000] [Citation(s) in RCA: 43] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
19
|
|
20
|
|
21
|
|
22
|
|
23
|
|
24
|
|
25
|
Busey RH, Sonder E. Magnetic Susceptibility of Potassium Hexachlororhenate (IV) and Potassium Hexabromorhenate (IV) from 5° to 300°K. J Chem Phys 1962. [DOI: 10.1063/1.1732325] [Citation(s) in RCA: 45] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
26
|
|
27
|
|
28
|
|
29
|
|
30
|
|
31
|
|
32
|
|