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Bouzinier MA, Etin D, Trifonov SI, Evdokimova VN, Ulitin V, Shen J, Kokorev A, Ghazani AA, Chekaluk Y, Albertyn Z, Giersch A, Morton CC, Abraamyan F, Bendapudi PK, Sunyaev S, Undiagnosed Diseases Network, Brigham Genomic Medicine, SEQuencing A Baby For An Optimal Outcome, Quantori, Krier JB. AnFiSA: An open-source computational platform for the analysis of sequencing data for rare genetic disease. J Biomed Inform 2022; 133:104174. [PMID: 35998814 DOI: 10.1016/j.jbi.2022.104174] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 07/23/2022] [Accepted: 08/15/2022] [Indexed: 11/28/2022]
Abstract
Despite genomic sequencing rapidly transforming from being a bench-side tool to a routine procedure in a hospital, there is a noticeable lack of genomic analysis software that supports both clinical and research workflows as well as crowdsourcing. Furthermore, most existing software packages are not forward-compatible in regards to supporting ever-changing diagnostic rules adopted by the genetics community. Regular updates of genomics databases pose challenges for reproducible and traceable automated genetic diagnostics tools. Lastly, most of the software tools score low on explainability amongst clinicians. We have created a fully open-source variant curation tool, AnFiSA, with the intention to invite and accept contributions from clinicians, researchers, and professional software developers. The design of AnFiSA addresses the aforementioned issues via the following architectural principles: using a multidimensional database management system (DBMS) for genomic data to address reproducibility, curated decision trees adaptable to changing clinical rules, and a crowdsourcing-friendly interface to address difficult-to-diagnose cases. We discuss how we have chosen our technology stack and describe the design and implementation of the software. Finally, we show in detail how selected workflows can be implemented using the current version of AnFiSA by a medical geneticist.
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Affiliation(s)
- M A Bouzinier
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
| | - D Etin
- Forome Association, Boston, MA, USA; Oracle Corporation, USA.
| | | | - V N Evdokimova
- Forome Association, Boston, MA, USA; SBCS Scientific Biomedical Consulting Services, London, UK
| | - V Ulitin
- Forome Association, Boston, MA, USA
| | - J Shen
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - A Kokorev
- ITMO University, St. Petersburg, Russian Federation
| | - A A Ghazani
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Harvard Medical School, Boston, MA, USA; Brigham Genomic Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Y Chekaluk
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Z Albertyn
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - A Giersch
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - C C Morton
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Manchester Centre for Audiology and Deafness (ManCAD), School of Health Sciences, University of Manchester, UK
| | - F Abraamyan
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - P K Bendapudi
- Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center, Boston, MA, USA; Division of Hematology and Blood Transfusion Service, Massachusetts General Hospital, Boston, MA, USA
| | - S Sunyaev
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | | | | | | | | | - J B Krier
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
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Evdokimova VN, Nikitina TV, Lebedev IN, Sukhanova NN, Nazarenko SA. [Sex ratio in early embryonal mortality in man]. Ontogenez 2000; 31:251-7. [PMID: 10984900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The problem of the functioning specificity of sex chromosomes during the early stages of embryogenesis in man and the associated problem of the sex ratio in spontaneous and induced abortions, as well as in newborns, remains open. We have conducted a cytogenetic examination of 342 spontaneous abortions divided into three clinical groups on the basis of the severity of the developmental disturbances of the embryo: spontaneous abortions sensu stricto with a developed embryo without any significant intrauterine delay of development (n = 100), nondeveloping pregnancies (n = 176), and anembryonic fetuses (n = 66). The frequency of chromosomal mutations in these groups was 22.0, 48.3, and 48.5%, respectively. Statistical analysis has demonstrated significant differences between the studied groups in the frequencies of the normal and abnormal karyotypes: the major contributions to these differences were associated with autosomal trisomy, triploidy, and 46,XY karyotype. The presence of 46,XY may reflect specific genetic mechanisms of prenatal mortality of embryos with normal karyotype, associated with sex and/or with the imprinting of X-chromosomes. The sex ratio in spontaneous abortions with normal karyotype was as follows: 0.77 for spontaneous abortions with well-developed embryos without any significant intrauterine delay of development; 0.60 for non-developing pregnancies; and 0.31 for anembryonic fetuses. An analysis of DNA from the embryos and their parents has demonstrated a low probability of contamination of cell cultures with mother cells as a possible source of prevalence of embryos with 46,XX karyotype among spontaneous abortions. Nondeveloping pregnancies and anembryonic fetuses showed statistically significant differences in the sex ratio (1.11) from the control group consisting of medical abortions. Differences in the sex ratio were due to an increasingly lower proportion of embryos with karyotype 46,XY (relative to the expected one) among the fetuses with an increased severity of developmental disturbances. The statistical "chances ratio" index also provided evidence that embryos with 46,XY karyotype had a higher propensity to produce a well-formed fetus as compared with the female embryos. We propose that the expression of genes of the maternal X-chromosome in XY embryos supports a more stable development during early embryogenesis as compared with XX embryos. In the latter case, normal development is coupled with the operation of an additional mechanism for compensation of the dose of X-linked genes. Operation of this mechanism increases the probability of disturbances in female embryos. A higher viability of XY embryos during the early stages of ontogenesis in man appears to explain their underrepresentation in samples of spontaneously aborted embryos and appears to be the major factor responsible for the deviation of the sex ratio from the theoretically expected value.
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Affiliation(s)
- V N Evdokimova
- Institute of Medical Genetics, Tomsk Science Center, Siberian Division of Russian Academy of Medical Sciences, Tomsk, Russia
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Evdokimova VN, Nazarenko SA. [The absence of uniparental X-chromosome inheritance in spontaneous abortuses with a 46,XX karyotype]. Ontogenez 2000; 31:201-4. [PMID: 10867934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
The problem of the presence of imprinted regions on the X-chromosome and the possible influence of the imprinted expression of X-linked genes on the embryonic development in man remains largely unsolved. A comparison of the uniparental inheritance of chromosomes or of their regions having different phenotypic manifestations provides an instrument with which to study the phenomenon of genomic imprinting at the chromosomal level. Assuming that the imprinted inactivation of X-chromosomes is functionally significant for embryonic development, we have studied several polymorphic micro- and minisatellite loci of X-chromosomes in 52 fetuses with karyotype 46,XX, which were spontaneously aborted during the first trimester of pregnancy. The purpose was to determine the contribution of uniparental disomy for the X-chromosome in any disturbances of the embryonic development. We found that inheritance of X-chromosomes was biparental in the studied embryos, suggesting the absence of any significant contribution of the parental origin of the X-chromosome to embryonic mortality occurring between 4 and 12 weeks of development.
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Affiliation(s)
- V N Evdokimova
- Research Institute of Medical Genetics, Tomsk Science Center, Russian Academy of Sciences, Russia
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