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Qiao L. cfDNA from maternal plasma for noninvasive screening of fetal exomes. Am J Clin Exp Immunol 2024; 13:56-57. [PMID: 38496357 PMCID: PMC10944361] [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] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/22/2024] [Indexed: 03/19/2024]
Abstract
In recent years, a shift in prenatal screening methods has been observed, moving away from traditional approaches such as ultrasound and maternal serologic markers towards the utilization of noninvasive prenatal testing (NIPT) based on cfDNA extracted from peripheral blood. This cutting-edge technology has established itself as the primary screening method, attributed to its superior detection rate and reduced false-positive rate. Although NIPT predominantly focuses on screening for chromosomal abnormalities, it currently does not encompass the identification of single-gene disorders. Considering that single-gene disorders contribute significantly to birth defects, accounting for 7.5% to 12% of cases, it becomes imperative to integrate screening for single-gene disorders into the birth defect prevention and control system. This study aims to provide a succinct overview of the recent advancements in NIPT specifically tailored for monogenic disorders.
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Affiliation(s)
- Longwei Qiao
- Center for Reproduction and Genetics, School of Gusu, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Nanjing Medical University Suzhou, Jiangsu, China
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2
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Pandey P, Alexov E. Most Monogenic Disorders Are Caused by Mutations Altering Protein Folding Free Energy. Int J Mol Sci 2024; 25:1963. [PMID: 38396641 PMCID: PMC10888012 DOI: 10.3390/ijms25041963] [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: 12/29/2023] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
Revealing the molecular effect that pathogenic missense mutations have on the corresponding protein is crucial for developing therapeutic solutions. This is especially important for monogenic diseases since, for most of them, there is no treatment available, while typically, the treatment should be provided in the early development stages. This requires fast targeted drug development at a low cost. Here, we report an updated database of monogenic disorders (MOGEDO), which includes 768 proteins and the corresponding 2559 pathogenic and 1763 benign mutations, along with the functional classification of the corresponding proteins. Using the database and various computational tools that predict folding free energy change (ΔΔG), we demonstrate that, on average, 70% of pathogenic cases result in decreased protein stability. Such a large fraction indicates that one should aim at in silico screening for small molecules stabilizing the structure of the mutant protein. We emphasize that knowledge of ΔΔG is essential because one wants to develop stabilizers that compensate for ΔΔG, but do not make protein over-stable, since over-stable protein may be dysfunctional. We demonstrate that, by using ΔΔG and predicted solvent exposure of the mutation site, one can develop a predictive method that distinguishes pathogenic from benign mutations with a success rate even better than some of the leading pathogenicity predictors. Furthermore, hydrophobic-hydrophobic mutations have stronger correlations between folding free energy change and pathogenicity compared with others. Also, mutations involving Cys, Gly, Arg, Trp, and Tyr amino acids being replaced by any other amino acid are more likely to be pathogenic. To facilitate further detection of pathogenic mutations, the wild type of amino acids in the 768 proteins mentioned above was mutated to other 19 residues (14,847,817 mutations), the ΔΔG was calculated with SAAFEC-SEQ, and 5,506,051 mutations were predicted to be pathogenic.
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Affiliation(s)
| | - Emil Alexov
- Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA;
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3
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Parikh F, Athalye A, Madon P, Khandeparkar M, Naik D, Sanap R, Udumudi A. Genetic counseling for pre-implantation genetic testing of monogenic disorders (PGT-M). Front Reprod Health 2023; 5:1213546. [PMID: 38162012 PMCID: PMC10755023 DOI: 10.3389/frph.2023.1213546] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 12/04/2023] [Indexed: 01/03/2024] Open
Abstract
Pre-implantation genetic testing (PGT) is a vital tool in preventing chromosomal aneuploidies and other genetic disorders including those that are monogenic in origin. It is performed on embryos created by intracytoplasmic sperm injection (ICSI). Genetic counseling in the area of assisted reproductive technology (ART) has also evolved along with PGT and is considered an essential and integral part of Reproductive Medicine. While PGT has the potential to prevent future progeny from being affected by genetic conditions, genetic counseling helps couples understand and adapt to the medical, psychological, familial and social implications of the genetic contribution to disease. Genetic counseling is particularly helpful for couples with recurrent miscarriages, advanced maternal age, a partner with a chromosome translocation or inversion, those in a consanguineous marriage, and those using donor gametes. Partners with a family history of genetic conditions including hereditary cancer, late onset neurological diseases and with a carrier status for monogenic disorders can benefit from genetic counseling when undergoing PGT for monogenic disorders (PGT-M). Genetic counseling for PGT is useful in cases of Mendelian disorders, autosomal dominant and recessive conditions and sex chromosome linked disorders and for the purposes of utilizing HLA matching technology for creating a savior sibling. It also helps in understanding the importance of PGT in cases of variants of uncertain significance (VUS) and variable penetrance. The possibilities and limitations are discussed in detail during the sessions of genetic counseling.
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Affiliation(s)
- Firuza Parikh
- Department of Assisted Reproduction and Genetics, Jaslok-FertilTree International Fertility Centre, Jaslok Hospital and Research Centre, Mumbai, India
| | - Arundhati Athalye
- Department of Assisted Reproduction and Genetics, Jaslok-FertilTree International Fertility Centre, Jaslok Hospital and Research Centre, Mumbai, India
| | - Prochi Madon
- Department of Assisted Reproduction and Genetics, Jaslok-FertilTree International Fertility Centre, Jaslok Hospital and Research Centre, Mumbai, India
| | - Meenal Khandeparkar
- Department of Assisted Reproduction and Genetics, Jaslok-FertilTree International Fertility Centre, Jaslok Hospital and Research Centre, Mumbai, India
| | - Dattatray Naik
- Department of Assisted Reproduction and Genetics, Jaslok-FertilTree International Fertility Centre, Jaslok Hospital and Research Centre, Mumbai, India
| | - Rupesh Sanap
- Department of Assisted Reproduction and Genetics, Jaslok-FertilTree International Fertility Centre, Jaslok Hospital and Research Centre, Mumbai, India
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Louw N, Carstens N, Lombard Z. Incorporating CNV analysis improves the yield of exome sequencing for rare monogenic disorders-an important consideration for resource-constrained settings. Front Genet 2023; 14:1277784. [PMID: 38155715 PMCID: PMC10753787 DOI: 10.3389/fgene.2023.1277784] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/22/2023] [Indexed: 12/30/2023] Open
Abstract
Exome sequencing (ES) is a recommended first-tier diagnostic test for many rare monogenic diseases. It allows for the detection of both single-nucleotide variants (SNVs) and copy number variants (CNVs) in coding exonic regions of the genome in a single test, and this dual analysis is a valuable approach, especially in limited resource settings. Single-nucleotide variants are well studied; however, the incorporation of copy number variant analysis tools into variant calling pipelines has not been implemented yet as a routine diagnostic test, and chromosomal microarray is still more widely used to detect copy number variants. Research shows that combined single and copy number variant analysis can lead to a diagnostic yield of up to 58%, increasing the yield with as much as 18% from the single-nucleotide variant only pipeline. Importantly, this is achieved with the consideration of computational costs only, without incurring any additional sequencing costs. This mini review provides an overview of copy number variant analysis from exome data and what the current recommendations are for this type of analysis. We also present an overview on rare monogenic disease research standard practices in resource-limited settings. We present evidence that integrating copy number variant detection tools into a standard exome sequencing analysis pipeline improves diagnostic yield and should be considered a significantly beneficial addition, with relatively low-cost implications. Routine implementation in underrepresented populations and limited resource settings will promote generation and sharing of CNV datasets and provide momentum to build core centers for this niche within genomic medicine.
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Affiliation(s)
- Nadja Louw
- Division of Human Genetics, National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Nadia Carstens
- Division of Human Genetics, National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
- Genomics Platform, South African Medical Research Council, Cape Town, South Africa
| | - Zané Lombard
- Division of Human Genetics, National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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5
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Yan L, Cao Y, Chen ZJ, Du J, Wang S, Huang H, Huang J, Li R, Liu P, Zhang Z, Huang Y, Lin G, Pan H, Qi H, Qian W, Sun Y, Wu L, Yao Y, Zhang B, Zhang C, Zhao S, Zhou C, Zhang X, Qiao J. Chinese experts' consensus guideline on preimplantation genetic testing of monogenic disorders. Hum Reprod 2023; 38:ii3-ii13. [PMID: 37982416 DOI: 10.1093/humrep/dead112] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 11/11/2022] [Revised: 03/06/2023] [Indexed: 11/21/2023] Open
Abstract
Recent developments in molecular biological technologies and genetic diagnostic methods, accompanying with updates of relevant terminologies, have enabled the improvements of new strategies of preimplantation genetic testing for monogenic (single gene) disorders (PGT-M) to prevent the transmission of inherited diseases. However, there has been much in the way of published consensus on PGT-M. To properly regulate the application of PGT-M, Chinese experts in reproductive medicine and genetics have jointly developed this consensus statement. The consensus includes indications for patient selection, genetic and reproductive counseling, informed consent, diagnostic strategies, report generation, interpretation of results and patient follow-ups. This consensus statement serves to assist in establishment of evidence-based clinical and laboratory practices for PGT-M.
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Affiliation(s)
- Liying Yan
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Yunxia Cao
- The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zi-Jiang Chen
- Hospital for Reproductive Medicine Affiliated to Shandong University, Jinan, China
| | - Jie Du
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - ShuYu Wang
- Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Hefeng Huang
- Obstetrics & Gynecology Hospital of Fudan University, Shanghai, China
| | - Jin Huang
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Rong Li
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Ping Liu
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Zhe Zhang
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Yu Huang
- Peking University Health Science Center, Beijing, China
| | - Ge Lin
- Reproductive & Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Hong Pan
- Peking University First Hospital, Beijing, China
| | - Hongbo Qi
- The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiping Qian
- Peking University Shenzhen Hospital, Shenzhen, China
| | - Yun Sun
- Renji Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Lingqian Wu
- The State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Yuanqing Yao
- Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Bo Zhang
- Maternity and Child Health Care of Guangxi Zhuang Autonomous Region, Nanning, China
| | | | - Shuyun Zhao
- Hospital Affiliated to Guizhou Medical University, Guiyang, China
| | - Canquan Zhou
- The First Affiliated Hospital, Sun Yat-sen Univeristy, Guangzhou, China
| | - Xue Zhang
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing, China
| | - Jie Qiao
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
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6
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Tran NT, Vo ST, Nguyen DA, Nguyen CC, Dinh LT, Tran MTT, Tran DC, Luong LAT, Doan KP, Huy Nguyen VQ, Thi Ha TM, Truong LGT, Cao PTM, Tran VTN, Nhut Trinh TH, Le QT, Nguyen VT, Hoang DTT, Nguyen MNB, Bui CT, Tran STT, Lam DT, Le HT, Nguyen MNB, Ho VT, Nguyen MT, Dao TT, Nguyen PM, Nguyen THL, Ha NP, Lu YT, Do TTT, Truong DK, Phan MD, Nguyen HN, Giang H, Tang HS. De novo variants of dominant monogenic disorders in Vietnam detected by a noninvasive prenatal test: a case series. Per Med 2023; 20:467-475. [PMID: 37937420 DOI: 10.2217/pme-2023-0105] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Background: Noninvasive prenatal tests for monogenic diseases (NIPT-SGG) have recently been reported as helpful in early-stage antenatal screening. Our study describes the clinical and genetic features of cases identified by NIPT-SGG. Materials & methods: In a cohort pregnancy with abnormal sonograms, affected cases were confirmed by invasive diagnostic tests concurrently, with NIPT-SGG targeting 25 common dominant single-gene diseases. Results: A total of 13 single-gene fetuses were confirmed, including Noonan and Costello syndromes, thanatophoric dysplasia, achondroplasia, osteogenesis imperfecta and Apert syndrome. Two novel variants seen were tuberous sclerosis complex (TSC2 c.4154G>A) and Alagille syndrome (JAG1 c.3452del). Conclusion: NIPT-SGG and standard tests agree on the results for 13 fetuses with monogenic disorders. This panel method of screening can benefit high-risk Vietnamese pregnancies, but further research is encouraged to expand on the causative gene panel.
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Affiliation(s)
- Nhat-Thang Tran
- University of Medicine & Pharmacy at Ho Chi Minh City, Ho Chi Minh City, 70000, Vietnam
- University Medical Center, Ho Chi Minh City, 70000, Vietnam
| | - Son Ta Vo
- Vinmec Health Care System, Hanoi City, 10000, Vietnam
| | - Duy-Anh Nguyen
- Hanoi Obstetrics & Gynecology Hospital, Hanoi City, 10000, Vietnam
- Hanoi Medical University, Hanoi City, 10000, Vietnam
| | - Canh-Chuong Nguyen
- Hanoi Obstetrics & Gynecology Hospital, Hanoi City, 10000, Vietnam
- Hanoi Medical University, Hanoi City, 10000, Vietnam
| | - Linh Thuy Dinh
- Hanoi Obstetrics & Gynecology Hospital, Hanoi City, 10000, Vietnam
| | | | - Danh-Cuong Tran
- National Hospital of Obstetrics & Gynecology, Hanoi City, 10000, Vietnam
| | | | - Kim-Phuong Doan
- Hanoi Medical University Hospital, Hanoi City, 10000, Vietnam
| | | | - Thi Minh Thi Ha
- University of Medicine & Pharmacy, Hue University, 49100, Vietnam
| | | | - Phuong Thi-Mai Cao
- University of Medicine & Pharmacy at Ho Chi Minh City, Ho Chi Minh City, 70000, Vietnam
- University Medical Center, Ho Chi Minh City, 70000, Vietnam
| | | | | | | | | | | | | | - Chi-Thuong Bui
- Gia Dinh People's Hospital, Ho Chi Minh City, 70000, Vietnam
| | - Son-Tra Thi Tran
- Vietnam-Cuba Friendship Dong Hoi Hospital, Dong Hoi City, 47100, Vietnam
| | - Duc-Tam Lam
- Can Tho University of Medicine & Pharmacy, Can Tho, 94000, Vietnam
| | - Hong-Thinh Le
- Can Tho Obstetrics & Gynecology Hospital, Can Tho, 94000, Vietnam
| | | | - Viet-Thang Ho
- University of Medicine & Pharmacy at Ho Chi Minh City, Ho Chi Minh City, 70000, Vietnam
| | | | - Trang Thi Dao
- Hanoi Medical University, Hanoi City, 10000, Vietnam
| | - Phuong Minh Nguyen
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Thu-Hang Le Nguyen
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Nhung Phuong Ha
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Y-Thanh Lu
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | | | | | - Minh-Duy Phan
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Hoai-Nghia Nguyen
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Hoa Giang
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Hung-Sang Tang
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
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Ibarra-González I, Fernández-Lainez C, Vela-Amieva M, Guillén-López S, Belmont-Martínez L, López-Mejía L, Carrillo-Nieto RI, Guillén-Zaragoza NA. A Review of Disparities and Unmet Newborn Screening Needs over 33 Years in a Cohort of Mexican Patients with Inborn Errors of Intermediary Metabolism. Int J Neonatal Screen 2023; 9:59. [PMID: 37873850 PMCID: PMC10594536 DOI: 10.3390/ijns9040059] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/26/2023] [Accepted: 10/02/2023] [Indexed: 10/25/2023] Open
Abstract
Advances in an early diagnosis by expanded newborn screening (NBS) have been achieved mainly in developed countries, while populations of middle- and low-income countries have poor access, leading to disparities. Expanded NBS in Mexico is not mandatory. Herein, we present an overview of the differences and unmet NBS needs of a group of Mexican patients with inborn errors of intermediary metabolism (IEiM), emphasizing the odyssey experienced to reach a diagnosis. We conducted a retrospective observational study of a historical cohort of patients with IEiM from a national reference center. A total of 924 patients with IEiM were included. Although 72.5% of the diseases identified are detectable by expanded NBS, only 35.4% of the patients were screened. The mortality in the unscreened group was almost two-fold higher than that in the screened group. Patients experienced a median diagnostic delay of 4 months, which is unacceptably long considering that to prevent disability and death, these disorders must be treated in the first days of life. Patients had to travel long distances to our reference center, contributing to their unacceptable diagnostic odyssey. This study highlights the urgent need to have an updated, expanded NBS program with adequate follow up in Mexico and promote the creation of regional medical care centers. We also provide compelling evidence that could prove valuable to decision makers overseeing public health initiatives for individuals impacted by IEiM from middle- and low-income countries.
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Affiliation(s)
- Isabel Ibarra-González
- Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Secretaría de Salud, Ciudad de México 04530, Mexico
- Unidad de Genética de la Nutrición, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Cynthia Fernández-Lainez
- Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Secretaría de Salud, Ciudad de México 04530, Mexico
| | - Marcela Vela-Amieva
- Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Secretaría de Salud, Ciudad de México 04530, Mexico
| | - Sara Guillén-López
- Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Secretaría de Salud, Ciudad de México 04530, Mexico
| | - Leticia Belmont-Martínez
- Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Secretaría de Salud, Ciudad de México 04530, Mexico
| | - Lizbeth López-Mejía
- Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Secretaría de Salud, Ciudad de México 04530, Mexico
| | - Rosa Itzel Carrillo-Nieto
- Laboratorio de Errores Innatos del Metabolismo y Tamiz, Instituto Nacional de Pediatría, Secretaría de Salud, Ciudad de México 04530, Mexico
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Jeppesen LD, Hatt L, Singh R, Schelde P, Ravn K, Toft CL, Laursen MB, Hedegaard J, Christensen IB, Nicolaisen BH, Andreasen L, Pedersen LH, Vogel I, Lildballe DL. Clinical interpretation of cell-based non-invasive prenatal testing for monogenic disorders including repeat expansion disorders: potentials and pitfalls. Front Genet 2023; 14:1188472. [PMID: 37829280 PMCID: PMC10565008 DOI: 10.3389/fgene.2023.1188472] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 09/12/2023] [Indexed: 10/14/2023] Open
Abstract
Introduction: Circulating fetal cells isolated from maternal blood can be used for prenatal testing, representing a safe alternative to invasive testing. The present study investigated the potential of cell-based noninvasive prenatal testing (NIPT) for diagnosing monogenic disorders dependent on the mode of inheritance. Methods: Maternal blood samples were collected from women opting for prenatal diagnostics for specific monogenic disorders (N = 7). Fetal trophoblasts were enriched and stained using magnetic activated cell sorting and isolated by fluorescens activated single-cell sorting. Individual cells were subject to whole genome amplification, and cells of fetal origin were identified by DNA-profiling using short tandem repeat markers. The amplified fetal DNA was input for genetic testing for autosomal dominant-, autosomal recessive-, X-linked and repeat expansion disorders by direct variant analysis and haplotyping. The cell-based NIPT results were compared with those of invasive testing. Results: In two cases at risk of skeletal dysplasia, caused by variants in the FGFR3 gene (autosomal dominant disorders), cell-based NIPT correctly stated an affected fetus, but allelic dropout of the normal alleles were observed in both cases. Cell-based NIPT gave an accurate result in two cases at risk of autosomal recessive disorders, where the parents carried either different diastrophic dysplasia causing variants in the SLC26A2 gene or the same cystic fibrosis disease-causing variant in the CFTR gene. Cell-based NIPT accurately identified an affected male fetus in a pregnancy at risk of Duchenne muscular dystrophy (DMD gene, X-linked recessive disorders). In two cases at risk of the myotonic dystrophy type 1 (DMPK gene, repeat expansion disorder), cell-based NIPT correctly detected an affected and an unaffected fetus, respectively. Discussion: Circulating fetal cells can be used to detect both maternally- and paternally inherited monogenic disorders irrespective of the type of variant, however, the risk of allelic dropout must be considered. We conclude that the clinical interpretation of the cell-based NIPT result thus varies depending on the disorders' mode of inheritance.
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Affiliation(s)
- Line Dahl Jeppesen
- ARCEDI Biotech, Vejle, Denmark
- Center for Fetal Diagnostics, Aarhus University, Aarhus, Denmark
| | | | | | | | | | - Christian Liebst Toft
- Department of Molecular Diagnostics, Aalborg University Hospital, Aalborg, Denmark
- Center for Preimplantation Genetic Testing, Aalborg University Hospital, Aalborg, Denmark
| | | | | | | | | | - Lotte Andreasen
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Lars Henning Pedersen
- Department of Gynecology and Obstetrics, Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Ida Vogel
- Center for Fetal Diagnostics, Aarhus University, Aarhus, Denmark
- Department of Gynecology and Obstetrics, Aarhus University Hospital, Aarhus, Denmark
| | - Dorte Launholt Lildballe
- Center for Fetal Diagnostics, Aarhus University, Aarhus, Denmark
- Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
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9
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Nguyen NY, Lu YT, Nguyen DA, Nguyen CC, Dinh LT, Tran MTT, Tran DC, Luong LAT, Doan KP, Huy Nguyen VQ, Thi Ha TM, Truong LGT, Tran NT, Cao PTM, Tran VTN, Nhut Trinh TH, Le QT, Nguyen VT, Hoang DTT, Vo ST, Nguyen MNB, Bui CT, Tran STT, Lam DT, Le HT, Nguyen MNB, Ho VT, Nguyen MT, Doan PL, Tran KVT, Tran HTT, Tran UV, Dinh AM, Nguyen TTT, Do TTT, Truong DK, Phan MD, Nguyen HN, Tang HS, Giang H. Developing and validating noninvasive prenatal testing for de novo autosomal dominant monogenic diseases in Vietnam. Per Med 2023; 20:425-433. [PMID: 37623819 DOI: 10.2217/pme-2023-0076] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Background: Over 60% of single-gene diseases in newborns are autosomal dominant variants. Noninvasive prenatal testing for monogenic conditions (NIPT-SGG) is cost-effective and timesaving, but not widely applied. This study introduces and validates NIPT-SGG in detecting 25 monogenic conditions. Methods: NIPT-SGG with a 30-gene panel applied next-generation sequencing and trio assays to confirm de novo variants. Diagnostic tests confirmed NIPT-detected cases. Results: Among 93 pregnancies with ultrasound findings, 11 (11.8%) fetuses were screened and diagnosed with monogenic diseases, mostly with Noonan syndrome. NIPT-SGG determined >99.99% of actual positive and negative cases, confirmed by diagnostic tests. No false-negatives or false-positives were reported. Conclusion: NIPT-SGG effectively identifies the fetuses affected with monogenic diseases, which is a promisingly safe and timely antenatal screening option for high-risk pregnancies.
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Affiliation(s)
- Nhi Yen Nguyen
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Y-Thanh Lu
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Duy-Anh Nguyen
- Hanoi Obstetrics & Gynecology Hospital, Hanoi City, 10000, Vietnam
- Hanoi Medical University, Hanoi City, 10000, Vietnam
| | - Canh-Chuong Nguyen
- Hanoi Obstetrics & Gynecology Hospital, Hanoi City, 10000, Vietnam
- Hanoi Medical University, Hanoi City, 10000, Vietnam
| | - Linh Thuy Dinh
- Hanoi Obstetrics & Gynecology Hospital, Hanoi City, 10000, Vietnam
| | | | - Danh-Cuong Tran
- National Hospital of Obstetrics & Gynecology, Hanoi City, 10000, Vietnam
| | | | - Kim-Phuong Doan
- Hanoi Medical University Hospital, Hanoi City, 10000, Vietnam
| | - Vu Quoc Huy Nguyen
- University of Medicine & Pharmacy, Hue University, Hue City, 49100, Vietnam
| | - Thi Minh Thi Ha
- University of Medicine & Pharmacy, Hue University, Hue City, 49100, Vietnam
| | | | - Nhat-Thang Tran
- University of Medicine & Pharmacy at HCMC, Ho Chi Minh City, 70000, Vietnam
- University Medical Center, Ho Chi Minh City, 70000, Vietnam
| | - Phuong Thi-Mai Cao
- University of Medicine & Pharmacy at HCMC, Ho Chi Minh City, 70000, Vietnam
- University Medical Center, Ho Chi Minh City, 70000, Vietnam
| | | | | | | | | | | | - Son Ta Vo
- Vinmec Health Care System, Hanoi City, 10000, Vietnam
| | | | - Chi-Thuong Bui
- Gia Dinh People's Hospital, Ho Chi Minh City, 70000, Vietnam
| | - Son-Tra Thi Tran
- Vietnam-Cuba Friendship Dong Hoi Hospital, Dong Hoi City, Quang Binh Province, 47100, Vietnam
| | - Duc-Tam Lam
- Can Tho University of Medicine & Pharmacy, Can Tho City, 94000, Vietnam
| | - Hong-Thinh Le
- Can Tho Obstetrics & Gynecology Hospital, Can Tho City, 94000, Vietnam
| | | | - Viet-Thang Ho
- University of Medicine & Pharmacy at HCMC, Ho Chi Minh City, 70000, Vietnam
| | - Minh-Trung Nguyen
- Hanh Phuc An Giang Ob.Gyn Hospital, Long Xuyen City, An Giang Province,90100, Vietnam
| | - Phuoc-Loc Doan
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Kim-Van Thi Tran
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Huyen-Trang Thi Tran
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Uyen Vu Tran
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - An My Dinh
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Thanh-Thanh Thi Nguyen
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | | | | | - Minh-Duy Phan
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Hoai-Nghia Nguyen
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Hung-Sang Tang
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
| | - Hoa Giang
- Medical Genetics Institute, Ho Chi Minh City, 70000, Vietnam
- Gene Solutions, Ho Chi Minh City, 70000, Vietnam
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Clarke LA, Amaral MD. What Can RNA-Based Therapy Do for Monogenic Diseases? Pharmaceutics 2023; 15:pharmaceutics15010260. [PMID: 36678889 PMCID: PMC9863139 DOI: 10.3390/pharmaceutics15010260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/04/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
The use of RNA-based approaches to treat monogenic diseases (i.e., hereditary disorders caused by mutations in single genes) has been developed on different fronts. One approach uses small antisense oligonucleotides (ASOs) to modulate RNA processing at various stages; namely, to enhance correct splicing, to stimulate exon skipping (to exclude premature termination codon variants), to avoid undesired messenger RNA (mRNA) transcript degradation via the nonsense-mediated decay (NMD) pathway, or to induce mRNA degradation where they encode toxic proteins (e.g., in dominant diseases). Another approach consists in administering mRNA, which, like gene therapy, is a mutation-agnostic approach with potential application to any recessive monogenic disease. This is simpler than gene therapy because instead of requiring targeting of the nucleus, the mRNA only needs to be delivered to the cytoplasm. Although very promising (as demonstrated by COVID-19 vaccines), these approaches still have potential for optimisation, namely regarding delivery efficiency, adverse drug reactions and toxicity.
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11
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Spinella F, Bronet F, Carvalho F, Coonen E, De Rycke M, Rubio C, Goossens V, Van Montfoort A. ESHRE PGT Consortium data collection XXI: PGT analyses in 2018. Hum Reprod Open 2023; 2023:hoad010. [PMID: 37091225 PMCID: PMC10121336 DOI: 10.1093/hropen/hoad010] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Indexed: 04/25/2023] Open
Abstract
STUDY QUESTION What are the trends and developments in preimplantation genetic testing (PGT) in 2018 as compared to previous years? SUMMARY ANSWER The main trends observed in this 21st dataset on PGT are that the implementation of trophectoderm biopsy with comprehensive whole-genome testing is most often applied for PGT-A and concurrent PGT-M/SR/A, while for PGT-M and PGT-SR, single-cell testing with PCR and FISH still prevail. WHAT IS KNOWN ALREADY Since it was established in 1997, the ESHRE PGT Consortium has been collecting and analysing data from mainly European PGT centres. To date, 20 datasets and an overview of the first 10 years of data collections have been published. STUDY DESIGN SIZE DURATION The data for PGT analyses performed between 1 January 2018 and 31 December 2018 with a 2-year follow-up after analysis were provided by participating centres on a voluntary basis. Data were collected using an online platform, which is based on genetic analysis and has been in use since 2016. PARTICIPANTS/MATERIALS SETTING METHODS Data on biopsy method, diagnostic technology, and clinical outcome were submitted by 44 centres. Records with analyses for more than one PGT for monogenic disorders (PGT-M) and/or PGT for chromosomal structural rearrangements (PGT-SR), or with inconsistent data regarding the PGT modality, were excluded. All transfers performed within 2 years after the analysis were included, enabling the calculation of cumulative pregnancy rates. Data analysis, calculations, and preparation of figures and tables were carried out by expert co-authors. MAIN RESULTS AND THE ROLE OF CHANCE The current data collection from 2018 covers a total of 1388 analyses for PGT-M, 462 analyses for PGT-SR, 3003 analyses for PGT for aneuploidies (PGT-A), and 338 analyses for concurrent PGT-M/SR with PGT-A.The application of blastocyst biopsy is gradually rising for PGT-M (from 19% in 2016-2017 to 33% in 2018), is status quo for PGT-SR (from 30% in 2016-2017 to 33% in 2018) and has become the most used biopsy stage for PGT-A (from 87% in 2016-2017 to 98% in 2018) and for concurrent PGT-M/SR with PGT-A (96%). The use of comprehensive, whole-genome amplification (WGA)-based diagnostic technology showed a small decrease for PGT-M (from 15% in 2016-2017 to 12% in 2018) and for PGT-SR (from 50% in 2016-2017 to 44% in 2018). Comprehensive testing was, however, the main technology for PGT-A (from 93% in 2016-2017 to 98% in 2018). WGA-based testing was also widely used for concurrent PGT-M/SR with PGT-A, as a standalone technique (74%) or in combination with PCR or FISH (24%). Trophectoderm biopsy and comprehensive testing strategies are linked with higher diagnostic efficiencies and improved clinical outcomes per embryo transfer. LIMITATIONS REASONS FOR CAUTION The findings apply to the data submitted by 44 participating centres and do not represent worldwide trends in PGT. Details on the health of babies born were not provided in this manuscript. WIDER IMPLICATIONS OF THE FINDINGS The Consortium datasets provide a valuable resource for following trends in PGT practice. STUDY FUNDING/COMPETING INTERESTS The study has no external funding, and all costs are covered by ESHRE. There are no competing interests declared. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- F Spinella
- Correspondence address. Eurofins GENOMA Group srl, Via Castel Giubileo 11, Rome, Italy. E-mail:
| | - F Bronet
- IVIRMA—IVI Madrid, Madrid, Spain
| | - F Carvalho
- Genetics—Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal
- i3s—Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal
| | - E Coonen
- Department of Clinical Genetics, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - M De Rycke
- Centre for Medical Genetics, UZ Brussel, Brussels, Belgium
| | - C Rubio
- PGT-A Research, Igenomix, Valencia, Spain
| | - V Goossens
- ESHRE Central Office, Strombeek-Bever, Belgium
| | - A Van Montfoort
- Department of Clinical Genetics, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
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12
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Chopra M, Modi ME, Dies KA, Chamberlin NL, Buttermore ED, Brewster SJ, Prock L, Sahin M. GENE TARGET: A framework for evaluating Mendelian neurodevelopmental disorders for gene therapy. Mol Ther Methods Clin Dev 2022; 27:32-46. [PMID: 36156879 DOI: 10.1016/j.omtm.2022.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Interest in gene-based therapies for neurodevelopmental disorders is increasing exponentially, driven by the rise in recognition of underlying genetic etiology, progress in genomic technology, and recent proof of concept in several disorders. The current prioritization of one genetic disorder over another for development of therapies is driven by competing interests of pharmaceutical companies, advocacy groups, and academic scientists. Although these are all valid perspectives, a consolidated framework will facilitate more efficient and rational gene therapy development. Here we outline features of Mendelian neurodevelopmental disorders that warrant consideration when determining suitability for gene therapy. These features fit into four broad domains: genetics, preclinical validation, clinical considerations, and ethics. We propose a simple mnemonic, GENE TARGET, to remember these features and illustrate how they could be scored using a preliminary scoring rubric. In this suggested rubric, for a given disorder, scores for each feature may be added up to a composite GENE TARGET suitability (GTS) score. In addition to proposing a systematic method to evaluate and compare disorders, our framework helps identify gaps in the translational pipeline for a given disorder, which can inform prioritization of future research efforts.
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13
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Patrikiou A, Papadopoulou A, Noutsos C, Tzekis P, Koios N, Kourempeles I, Anifandis G, Sioga A, Grimbizis G, Tarlatzis BC, Chatzimeletiou K. Clinical Outcome, Socioeconomic Status and Psychological Constrains of Patients Undergoing Preimplantation Genetic Testing (PGT) in Northern Greece. Medicina (B Aires) 2022; 58:1493. [PMID: 36295653 DOI: 10.3390/medicina58101493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/07/2022] [Accepted: 10/11/2022] [Indexed: 11/05/2022] Open
Abstract
Background and objectives: Preimplantation genetic testing (PGT) offers patients the possibility of having a healthy baby free of chromosomal or genetic disorders. The present study focuses on the application of PGT for patients located in Northern Greece, investigating their clinical outcomes, their motives, and their overall physical and emotional experience during the treatment, in association with their socioeconomic background. Materials and Methods: Couples who underwent PGT for a monogenic condition (PGT-M, n = 19 cycles) or aneuploidy (PGT-A, n = 22 cycles) participated in the study. Fertilization, implantation, and pregnancy rates were recorded for all cycles. The couples were asked to fill in a questionnaire about the consultation they had received prior to treatment, their sociodemographic information, and the psychological impact PGT had on both the female and male partner. Results: The fertilization, implantation, and ongoing pregnancy rates for the PGT-M and PGT-A cycles were 81.3%, 70.6%, and 52.9%, and 78.2%, 64.3%, and 57.1%, respectively. Females experienced more intense physical pain than their male partners while psychological pain was encountered by both partners and occasionally in higher instances in males. No typical socioeconomic background of the patients referred for PGT in Northern Greece was noticed. Conclusion: PGT is an attractive alternative to prenatal diagnosis (PND), aiming to establisha healthy pregnancy by identifying and avoiding the transfer of chromosomally or genetically abnormal embryos to the uterus. Although the benefits of PGT were well-received by all patients undergoing the procedure, psychological pain was evident and especially prominent in patients with a previous affected child or no normal embryos for transfer. Holistic counseling is of utmost importance in order to make patients' experience during their journey to have a healthy baby less emotionally demanding and help them make the right choices for the future.
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14
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Duis J, Butler MG. Syndromic and Nonsyndromic Obesity: Underlying Genetic Causes in Humans. Adv Biol (Weinh) 2022; 6:e2101154. [PMID: 35680611 DOI: 10.1002/adbi.202101154] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 08/26/2021] [Revised: 03/13/2022] [Indexed: 01/28/2023]
Abstract
Growing evidence supports syndromic and nonsyndromic causes of obesity, including genome-wide association studies, candidate gene analysis, advanced genetic technology using next-generation sequencing (NGS), and identification of copy number variants. Identification of susceptibility genes impacts mechanistic understanding and informs precision medicine. The cause of obesity is heterogeneous with complex biological processes playing a role by controlling peptides involved in regulating appetite and food intake, cellular energy, and metabolism. Evidence for heritability shows genetic components contributing to 40%-70% of obesity. Monogenic causes and obesity-related syndromes are discussed and illustrated as well as biological pathways, gene interactions, and factors contributing to the obesity phenotype. Over 550 obesity-related single genes have been identified and summarized in tabular form with approximately 20% of these genes have been added to obesity gene panels for testing by commercially available laboratories. Early studies show that about 10% of patients with severe obesity using NGS testing have a pathogenic gene variant. Discussion to help characterize gene-gene interactions and disease mechanisms for early diagnosis, treatment, and risk factors contributing to disease is incorporated in this review.
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Affiliation(s)
- Jessica Duis
- Section of Genetics and Inherited Metabolic Disorders, Children's Hospital Colorado, University of Colorado, Anschutz Medical Campus, 13123 E 16th Ave, Aurora, CO, 80045, USA
| | - Merlin G Butler
- Division of Research and Genetics, Departments of Psychiatry & Behavioral Sciences and Pediatrics, University of Kansas Medical Center, 3901 Rainbow Boulevard, MS 4015, Kansas City, KS, 66160, USA
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15
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Cheng L, Meiser B, Kirk E, Kennedy D, Barlow-Stewart K, Kaur R. Factors influencing patients' decision-making about preimplantation genetic testing for monogenic disorders. Hum Reprod 2022; 37:2599-2610. [PMID: 36006036 DOI: 10.1093/humrep/deac185] [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: 04/20/2022] [Revised: 07/21/2022] [Indexed: 11/14/2022] Open
Abstract
STUDY QUESTION What are the roles of individual and interpersonal factors in couples' decision-making regarding preimplantation genetic testing for monogenic disorders (PGT-M)? SUMMARY ANSWER Couples' decision-making regarding PGT-M was associated with individual and interpersonal factors, that is the perceived consistency of information received, satisfaction with information, self-efficacy (individuals' beliefs in their ability to make decisions), actual knowledge about PGT-M and social support from the partner. WHAT IS KNOWN ALREADY Various factors have been shown to be associated with decision-making regarding PGT-M. However, PGT-M is experienced at an individual level, and to date, no studies have investigated the roles of the above-mentioned individual and interpersonal factors. STUDY DESIGN, SIZE, DURATION This is a cross-sectional study with 279 participants. Participants were recruited through IVFAustralia, Sydney Children's Hospital and support groups from May 2020 to November 2021. PARTICIPANTS/MATERIALS, SETTING, METHODS Participants were women who had undergone or were considering PGT-M and their partners. Participants were recruited through IVFAustralia, Sydney Children's Hospital and support groups to complete online questionnaires. Decisional regret, decisional satisfaction and decisional conflict were measured as outcome variables. Multiple linear regressions were performed to examine the association between factors and outcome variables. Mann-Whitney U tests were performed to test the differences between participants who had undergone PGT-M and those who were considering PGT-M. MAIN RESULTS AND THE ROLE OF CHANCE For couples who had undergone PGT-M, decisional regret was significantly negatively associated with perceived consistency of information received (β = -0.26, P < 0.01), self-efficacy (β = -0.25, P < 0.01) and actual knowledge about PGT-M (β = -0.30, P < 0.001), while decisional satisfaction had positive association with satisfaction with information received (β = 0.37, P < 0.001) and self-efficacy (β = 0.24, P < 0.05). For couples who were considering PGT-M, decisional conflict was negatively associated with satisfaction with information received (β = -0.56, P < 0.001). For females who had undergone PGT-M, decisional regret was negatively associated with social support from the partner (β = -0.35, P < 0.05) in addition to perceived consistency of information received (β = -0.24, P < 0.05). In this group, decisional satisfaction was positively associated with women's satisfaction with the information received (β = 0.34, P < 0.01), social support from the partner (β = 0.26, P < 0.05) and self-efficacy (β = 0.25, P < 0.05). For females who were considering PGT-M, decisional conflict was negatively associated with satisfaction with the information received (β = -0.43, P < 0.01) and social support from the partner (β = -0.30, P < 0.05). This study also identified those aspects of PGT-M that couples felt most concerned about in relation to their decision-making, in particular safety issues such as short- or long-term health problems for the baby and potential harms to the embryos and the mother's health. The likelihood of getting pregnant and having a baby with a genetic condition being tested for were also important in couples' decision-making. LIMITATIONS, REASONS FOR CAUTION This study assessed the concerns of couples about having a baby with a variety of genetic conditions. However, condition-specific issues might not be covered. Furthermore, social support from the partner was assessed among females only. Male participants' perceived social support from their partner and the association between mutual support and decision-making were not assessed due to the absence of dyadic data. WIDER IMPLICATIONS OF THE FINDINGS Results highlight the importance of effective patient education on PGT-M and the need to provide high-quality and consistent information in the context of patient-centred care. Patients are likely to benefit from information that addresses their specific concerns in relation to PGT-M. From females' perspective, support from partners is essential, and partners should, therefore, be encouraged to participate in all stages of the decision-making process. Suggestions for future studies were made. STUDY FUNDING/COMPETING INTEREST(S) B.M. was funded through a Senior Research Fellowship Level B (ID 1078523) from the National Health and Medical Research Council of Australia. L.C. was supported by a University International Postgraduate Award under the Australian Government Research Training Program (RTP) scholarship. No other funding was received for this study. The authors report no competing interests. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Lin Cheng
- Prince of Wales Clinical School, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia
| | - Bettina Meiser
- Prince of Wales Clinical School, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia
| | - Edwin Kirk
- Sydney Children's Hospital, Sydney, NSW, Australia.,School of Women's and Children's Health, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia
| | - Debra Kennedy
- Royal Hospital for Women, Sydney, NSW, Australia.,IVFAustralia, Sydney, NSW, Australia
| | - Kristine Barlow-Stewart
- Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Rajneesh Kaur
- Faculty of Medicine and Health Administration, The University of Sydney, Sydney, NSW, Australia
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16
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Pacault M, Verebi C, Lopez M, Vaucouleur N, Orhant L, Deburgrave N, Leturcq F, Vidaud D, Girodon E, Bienvenu T, Nectoux J. Non-invasive prenatal diagnosis of single gene disorders by paternal mutation exclusion: 3 years of clinical experience. BJOG 2022; 129:1879-1886. [PMID: 35486001 DOI: 10.1111/1471-0528.17201] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 04/22/2021] [Revised: 12/24/2021] [Accepted: 01/22/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Cell-free fetal DNA (cffDNA) analysis is performed routinely for aneuploidy screening, RhD genotyping or sex determination. Although applications to single gene disorders (SGD) are being rapidly developed worldwide, only a few laboratories offer cffDNA testing routinely as a diagnosis service for this indication. In a previous report, we described a standardised protocol for non-invasive exclusion of paternal variant in SGD. Three years later, we now report our clinical experience with the protocol. DESIGN Descriptive study. SETTING Multi-centre French. POPULATION Indications for referral included pregnancies at risk of 25% or 50% of paternally inherited SGD, and pregnancies associated with an increased risk of SGD due to a de novo variant, either from strongly suggestive ultrasound findings or from a possible parental germinal mosaicism in the context of a previously affected child. METHODS Non-invasive prenatal diagnosis was performed using custom assays for droplet digital PCR. Feasibility, diagnostic performance and turn-around time were evaluated. RESULTS Mean time for a new assay design and validation was evaluated at 14 days, and mean result reporting time was 6 days. All referred pathogenic variants could be targeted except one located in a complex genomic region. A result was obtained for every 198 referrals except two. CONCLUSION This service was successfully implemented as a routine laboratory practice. It has been widely adopted by French clinicians and patients for paternal variant exclusion in various disorders.
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Affiliation(s)
- Mathilde Pacault
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France.,Laboratoire de Génétique Moléculaire et d'Histocompatibilité, Centre Hospitalier Régional Universitaire, Brest, France
| | - Camille Verebi
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Maureen Lopez
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Nicolas Vaucouleur
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Lucie Orhant
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Nathalie Deburgrave
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - France Leturcq
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Dominique Vidaud
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Emmanuelle Girodon
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Thierry Bienvenu
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
| | - Juliette Nectoux
- Service de Médecine Génomique des Maladies de Système et d'Organe, Centre Université de Paris - Fédération de Génétique et de Médecine Génomique, Hôpital Cochin, APHP, Paris, France
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17
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Abstract
The etiology of neurodevelopmental disorders (NDDs) remains a challenge for researchers. Human brain development is tightly regulated and sensitive to cellular alterations caused by endogenous or exogenous factors. Intriguingly, the surge of clinical sequencing studies has revealed that many of these disorders are monogenic and monoallelic. Notably, chromatin regulation has emerged as highly dysregulated in NDDs, with many syndromes demonstrating phenotypic overlap, such as intellectual disabilities, with one another. Here we discuss epigenetic writers, erasers, readers, remodelers, and even histones mutated in NDD patients, predicted to affect gene regulation. Moreover, this review focuses on disorders associated with mutations in enzymes involved in histone acetylation and methylation, and it highlights syndromes involving chromatin remodeling complexes. Finally, we explore recently discovered histone germline mutations and their pathogenic outcome on neurological function. Epigenetic regulators are mutated at every level of chromatin organization. Throughout this review, we discuss mechanistic investigations, as well as various animal and iPSC models of these disorders and their usefulness in determining pathomechanism and potential therapeutics. Understanding the mechanism of these mutations will illuminate common pathways between disorders. Ultimately, classifying these disorders based on their effects on the epigenome will not only aid in prognosis in patients but will aid in understanding the role of epigenetic machinery throughout neurodevelopment.
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Affiliation(s)
- Khadija D. Wilson
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Elizabeth G. Porter
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Benjamin A. Garcia
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
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18
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Frewer V, Gilchrist CP, Collins SE, Williams K, Seal ML, Leventer RJ, Amor DJ. A systematic review of brain MRI findings in monogenic disorders strongly associated with autism spectrum disorder. J Child Psychol Psychiatry 2021; 62:1339-1352. [PMID: 34426966 DOI: 10.1111/jcpp.13510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/06/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Research on monogenic forms of autism spectrum disorder (autism) can inform our understanding of genetic contributions to the autism phenotype; yet, there is much to be learned about the pathways from gene to brain structure to behavior. This systematic review summarizes and evaluates research on brain magnetic resonance imaging (MRI) findings in monogenic conditions that have strong association with autism. This will improve understanding of the impact of genetic variability on brain structure and related behavioral traits in autism. METHODS The search strategy for this systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Risk of bias (ROB) assessment was completed on included studies using the Newcastle-Ottawa Scales. RESULTS Of 4,287 studies screened, 69 were included pertaining to 13 of the top 20 genes with the strongest association with autism. The greatest number of studies related to individuals with PTEN variants and autism. Brain MRI abnormalities were reported for 12 of the 13 genes studied, and in 51.7% of participants across all 13 genes, including 100% of participants with ARID1B variants. Specific MRI findings were highly variable, with no clear patterns emerging within or between the 13 genes, although white matter abnormalities were the most common. Few studies reported specific details about methods for acquisition and processing of brain MRI, and descriptors for brain abnormalities were variable. ROB assessment indicated high ROB for all studies, largely due to small sample sizes and lack of comparison groups. CONCLUSIONS Brain abnormalities are common in this population of individuals, in particular, children; however, a range of different brain abnormalities were reported within and between genes. Directions for future neuroimaging research in monogenic autism are suggested.
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Affiliation(s)
- Veronica Frewer
- Murdoch Children's Research Institute, Parkville, Vic., Australia.,Department of Paediatrics, The University of Melbourne, Parkville, Vic., Australia
| | - Courtney P Gilchrist
- Murdoch Children's Research Institute, Parkville, Vic., Australia.,Neurodevelopment in Health and Disease, RMIT University, Bundoora, Vic., Australia
| | - Simonne E Collins
- Murdoch Children's Research Institute, Parkville, Vic., Australia.,School of Psychological Sciences, Turner Institute for Brain & Mental Health, Monash University, Melbourne, Vic., Australia
| | - Katrina Williams
- Monash University, Melbourne, Vic., Australia.,Monash Children's Hospital, Melbourne, Vic., Australia
| | - Marc L Seal
- Murdoch Children's Research Institute, Parkville, Vic., Australia.,Department of Paediatrics, The University of Melbourne, Parkville, Vic., Australia
| | - Richard J Leventer
- Murdoch Children's Research Institute, Parkville, Vic., Australia.,Department of Paediatrics, The University of Melbourne, Parkville, Vic., Australia.,Royal Children's Hospital, Parkville, Vic., Australia
| | - David J Amor
- Murdoch Children's Research Institute, Parkville, Vic., Australia.,Department of Paediatrics, The University of Melbourne, Parkville, Vic., Australia.,Royal Children's Hospital, Parkville, Vic., Australia
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19
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Liu Y, Hao C, Li K, Hu X, Gao H, Zeng J, Guo R, Liu J, Guo J, Li Z, Qi Z, Jia X, Li W, Qian S. Clinical Application of Whole Exome Sequencing for Monogenic Disorders in PICU of China. Front Genet 2021; 12:677699. [PMID: 34539730 PMCID: PMC8440967 DOI: 10.3389/fgene.2021.677699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 08/03/2021] [Indexed: 12/30/2022] Open
Abstract
Objectives Whole exome sequencing (WES) has been widely used to detect genetic disorders in critically ill children. Relevant data are lacking in pediatric intensive care units (PICUs) of China. This study aimed to investigate the spectrum of monogenic disorders, the diagnostic yield and clinical utility of WES from a PICU in a large children's hospital of China. Methods From July 2017 to February 2020, WES was performed in 169 critically ill children with suspected monogenic diseases in the PICU of Beijing Children's Hospital. The clinical features, human phenotype ontology (HPO) terms, and assessment of clinical impact were analyzed. Results The media age of the enrolled children was 10.5 months (range, 1 month to 14.8 years). After WES, a total of 43 patients (25%) were diagnosed with monogenic disorders. The most common categories of diseases were metabolic disease (33%), neuromuscular disease (19%), and multiple deformities (14%). The diagnosis yield of children with "metabolism/homeostasis disorder" and "growth delay" or "ocular anomalies" was higher than that of children without these features. In addition, the diagnosis rate increased when more features were observed in children. The results of WES had an impact on the treatment for 30 cases (70%): (1) change of treatment (n = 11), (2) disease monitoring initiation (n = 18), (3) other systemic evaluation (n = 3), (4) family intervention (n = 2), and (5) rehabilitation and redirection of care toward palliative care (n = 12). Conclusion WES can be used as an effective diagnostic tool in the PICU of China and has an important impact on the treatment of patients with suspected monogenic conditions.
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Affiliation(s)
- Yingchao Liu
- Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
| | - Chanjuan Hao
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Kechun Li
- Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
| | - Xuyun Hu
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Hengmiao Gao
- Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
| | - Jiansheng Zeng
- Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
| | - Ruolan Guo
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Jun Liu
- Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
| | - Jun Guo
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Zheng Li
- Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
| | - Zhan Qi
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Xinlei Jia
- Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
| | - Wei Li
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute, MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Suyun Qian
- Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.,Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences (2019RU016), Beijing, China
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20
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Zhytnik L, Peters M, Tilk K, Simm K, Tõnisson N, Reimand T, Maasalu K, Acharya G, Krjutškov K, Salumets A. From late fatherhood to prenatal screening of monogenic disorders: evidence and ethical concerns. Hum Reprod Update 2021; 27:1056-1085. [PMID: 34329448 DOI: 10.1093/humupd/dmab023] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 03/08/2021] [Revised: 06/27/2021] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND With the help of ART, an advanced parental age is not considered to be a serious obstacle for reproduction anymore. However, significant health risks for future offspring hide behind the success of reproductive medicine for the treatment of reduced fertility associated with late parenthood. Although an advanced maternal age is a well-known risk factor for poor reproductive outcomes, understanding the impact of an advanced paternal age on offspring is yet to be elucidated. De novo monogenic disorders (MDs) are highly associated with late fatherhood. MDs are one of the major sources of paediatric morbidity and mortality, causing significant socioeconomic and psychological burdens to society. Although individually rare, the combined prevalence of these disorders is as high as that of chromosomal aneuploidies, indicating the increasing need for prenatal screening. With the help of advanced reproductive technologies, families with late paternity have the option of non-invasive prenatal testing (NIPT) for multiple MDs (MD-NIPT), which has a sensitivity and specificity of almost 100%. OBJECTIVE AND RATIONALE The main aims of the current review were to examine the effect of late paternity on the origin and nature of MDs, to highlight the role of NIPT for the detection of a variety of paternal age-associated MDs, to describe clinical experiences and to reflect on the ethical concerns surrounding the topic of late paternity and MD-NIPT. SEARCH METHODS An extensive search of peer-reviewed publications (1980-2021) in English from the PubMed and Google Scholar databases was based on key words in different combinations: late paternity, paternal age, spermatogenesis, selfish spermatogonial selection, paternal age effect, de novo mutations (DNMs), MDs, NIPT, ethics of late fatherhood, prenatal testing and paternal rights. OUTCOMES An advanced paternal age provokes the accumulation of DNMs, which arise in continuously dividing germline cells. A subset of DNMs, owing to their effect on the rat sarcoma virus protein-mitogen-activated protein kinase signalling pathway, becomes beneficial for spermatogonia, causing selfish spermatogonial selection and outgrowth, and in some rare cases may lead to spermatocytic seminoma later in life. In the offspring, these selfish DNMs cause paternal age effect (PAE) disorders with a severe and even life-threatening phenotype. The increasing tendency for late paternity and the subsequent high risk of PAE disorders indicate an increased need for a safe and reliable detection procedure, such as MD-NIPT. The MD-NIPT approach has the capacity to provide safe screening for pregnancies at risk of PAE disorders and MDs, which constitute up to 20% of all pregnancies. The primary risks include pregnancies with a paternal age over 40 years, a previous history of an affected pregnancy/child, and/or congenital anomalies detected by routine ultrasonography. The implementation of NIPT-based screening would support the early diagnosis and management needed in cases of affected pregnancy. However, the benefits of MD-NIPT need to be balanced with the ethical challenges associated with the introduction of such an approach into routine clinical practice, namely concerns regarding reproductive autonomy, informed consent, potential disability discrimination, paternal rights and PAE-associated issues, equity and justice in accessing services, and counselling. WIDER IMPLICATIONS Considering the increasing parental age and risks of MDs, combined NIPT for chromosomal aneuploidies and microdeletion syndromes as well as tests for MDs might become a part of routine pregnancy management in the near future. Moreover, the ethical challenges associated with the introduction of MD-NIPT into routine clinical practice need to be carefully evaluated. Furthermore, more focus and attention should be directed towards the ethics of late paternity, paternal rights and paternal genetic guilt associated with pregnancies affected with PAE MDs.
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Affiliation(s)
- Lidiia Zhytnik
- Competence Centre on Health Technologies, Tartu, Estonia
| | - Maire Peters
- Competence Centre on Health Technologies, Tartu, Estonia.,Department of Obstetrics and Gynaecology, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Kadi Tilk
- Competence Centre on Health Technologies, Tartu, Estonia
| | - Kadri Simm
- Institute of Philosophy and Semiotics, Faculty of Arts and Humanities, University of Tartu, Tartu, Estonia.,Centre of Ethics, University of Tartu, Tartu, Estonia
| | - Neeme Tõnisson
- Institute of Genomics, University of Tartu, Tartu, Estonia.,Department of Clinical Genetics, United Laboratories, Tartu University Hospital, Tartu, Estonia.,Department of Reproductive Medicine, West Tallinn Central Hospital, Tallinn, Estonia
| | - Tiia Reimand
- Department of Clinical Genetics, United Laboratories, Tartu University Hospital, Tartu, Estonia.,Department of Clinical Genetics, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Katre Maasalu
- Clinic of Traumatology and Orthopaedics, Tartu University Hospital, Tartu, Estonia.,Department of Traumatology and Orthopaedics, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Ganesh Acharya
- Division of Obstetrics and Gynaecology, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
| | - Kaarel Krjutškov
- Competence Centre on Health Technologies, Tartu, Estonia.,Department of Obstetrics and Gynaecology, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Andres Salumets
- Competence Centre on Health Technologies, Tartu, Estonia.,Department of Obstetrics and Gynaecology, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia.,Institute of Genomics, University of Tartu, Tartu, Estonia.,Division of Obstetrics and Gynaecology, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
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21
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van Montfoort A, Carvalho F, Coonen E, Kokkali G, Moutou C, Rubio C, Goossens V, De Rycke M. ESHRE PGT Consortium data collection XIX-XX: PGT analyses from 2016 to 2017 †. Hum Reprod Open 2021; 2021:hoab024. [PMID: 34322603 PMCID: PMC8313404 DOI: 10.1093/hropen/hoab024] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 05/19/2021] [Indexed: 01/22/2023] Open
Abstract
STUDY QUESTION What are the trends and developments in pre-implantation genetic testing (PGT) in 2016–2017 as compared to previous years? SUMMARY ANSWER The main trends observed in this 19th and 20th data set on PGT are that trophectoderm biopsy has become the main biopsy stage for PGT for aneuploidies (PGT-A) and that the implementation of comprehensive testing technologies is the most advanced with PGT-A. WHAT IS KNOWN ALREADY Since it was established in 1997, the ESHRE PGT Consortium has been collecting and analysing data from mainly European PGT centres. To date, 18 data sets and an overview of the first 10 years of data collections have been published. STUDY DESIGN, SIZE, DURATION The data for PGT analyses performed between 1 January 2016 and 31 December 2017 with a 2-year follow-up after analysis were provided by participating centres on a voluntary basis. Data were collected using a new online platform, which is based on genetic analysis as opposed to the former cycle-based format. PARTICIPANTS/MATERIALS, SETTING, METHODS Data on biopsy method, diagnostic technology and clinical outcome were submitted by 61 centres. Records with analyses for more than one PGT for monogenic/single gene defects (PGT-M) and/or PGT for chromosomal structural rearrangements (PGT-SR) indication or with inconsistent data regarding the PGT modality were excluded. All transfers performed within 2 years after the analysis were included enabling the calculation of cumulative pregnancy rates. Data analysis, calculations, figures and tables were made by expert co-authors. MAIN RESULTS AND THE ROLE OF CHANCE The current data collection from 2016 to 2017 covers a total of 3098 analyses for PGT-M, 1018 analyses for PGT-SR, 4033 analyses for PGT-A and 654 analyses for concurrent PGT-M/SR with PGT-A. The application of blastocyst biopsy is gradually rising for PGT-M (from 8–12% in 2013–2015 to 19% in 2016–2017), is status quo for PGT-R (from 22–36% in 2013–2015 to 30% in 2016–2017) and has become the preferential biopsy stage for PGT-A (from 23–36% in 2013–2015 to 87% in 2016–2017). For concurrent PGT-M/SR with PGT-A, biopsy was primarily performed at the blastocyst stage (93%). The use of comprehensive diagnostic technology showed a similar trend with a small increased use for PGT-M (from 9–12% in 2013–2015 to 15% in 2016–2017) and a status quo for PGT-SR (from 36–58% in 2013–2015 to 50% in 2016–2017). Comprehensive testing was the main technology for PGT-A (from 66–75% in 2013–2015 to 93% in 2016–2017) and for concurrent PGT-M/SR with PGT-A (93%). LIMITATIONS, REASONS FOR CAUTION The findings apply to the data submitted by 61 participating centres and do not represent worldwide trends in PGT. Details on the health of babies born were not provided in this manuscript. WIDER IMPLICATIONS OF THE FINDINGS Being the largest data collection on PGT in Europe/worldwide, the data sets provide a valuable resource for following trends in PGT practice. STUDY FUNDING/COMPETING INTEREST(S) The study has no external funding and all costs are covered by ESHRE. There are no competing interests declared. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- A van Montfoort
- Department of Obstetrics & Gynaecology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - F Carvalho
- Genetics-Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - E Coonen
- Departments of Clinical Genetics and Obstetrics & Gynaecology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - G Kokkali
- Reproductive Medicine Unit, Genesis Athens Clinic, Chalandri, Athens, Greece
| | - C Moutou
- Laboratoire de Diagnostic préimplantatoire, Université de Strasbourg, Hôpitaux Universitaires de Strasbourg, CMCO, Schiltigheim, France
| | - C Rubio
- PGT-A Research, Igenomix, Valencia, Spain
| | - V Goossens
- ESHRE Central Office, Grimbergen, Belgium
| | - M De Rycke
- Centre for Medical Genetics, UZ Brussel, Brussels, Belgium
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22
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Van Der Kelen A, Santos-Ribeiro S, De Vos A, Verdyck P, De Rycke M, Berckmoes V, Tournaye H, Blockeel C, De Vos M, Hes FJ, Keymolen K, Verpoest W. Parameters of poor prognosis in preimplantation genetic testing for monogenic disorders. Hum Reprod 2021; 36:2558-2566. [PMID: 34142115 DOI: 10.1093/humrep/deab136] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 01/13/2021] [Revised: 04/25/2021] [Indexed: 11/14/2022] Open
Abstract
STUDY QUESTION What is the likelihood of success of a single cycle of preimplantation genetic testing for monogenic disorders (PGT-M), measured as the cumulative live birth rate (CLBR) and based on various patient demographics? SUMMARY ANSWER For all women aged ≤40 years, the CLBR was at least 10% when the number of oocytes was ≥7 (range 10-30%) or was at least 5% when the number of oocytes was ≥3 (range 5-17%). WHAT IS KNOWN ALREADY The number of oocytes is significantly associated with the number of embryos for genetic testing and the clinical outcome in PGT-M. Embryos diagnosed as affected or embryos that remain without diagnosis cannot be used for embryo transfer. The size of the group of embryos non-suitable for transfer varies between 25% and 81%, depending on the indication. Thus, PGT-M is more likely to be more severely impacted by suboptimal ovarian response, poor fertilization and suboptimal embryo development than conventional IVF/ICSI schemes without PGT. STUDY DESIGN, SIZE, DURATION This was a single-centre retrospective comparative cohort study, of cycles between January 2011 and December 2015. A total number of 2265 PGT-M cycles were compared to 2833 conventional ICSI cycles. The principal aim of our study was the identification of the parameters of poor CLBR in couples undergoing PGT-M using multiplex short tandem repeat (STR) markers on blastomere biopsy DNA. The secondary aim was to compare the parameters of poor CLBR of the PGT-M population to those of couples undergoing ICSI without PGT. PARTICIPANTS/MATERIALS, SETTING, METHODS The baseline characteristics of the PGT-M group were compared to the conventional ICSI group. A multiple regression analysis was applied to account for the following potential confounding factors: female age, number of previous ART cycles, number of oocytes/suitable embryos for transfer and dosage of gonadotrophins used for ovarian stimulation. MAIN RESULTS AND THE ROLE OF CHANCE The PGT-M group was younger (female age 32.0 vs 34.5 years), had a higher number of previous ART cycles (1.1 vs 0.9 cycles) and used more gonadotrophins (2367 vs 1984 IU). Per cycle, the PGT-M group had more retrieved oocytes (11.8 vs 8.3 oocytes), fewer suitable embryos for transfer (1.7 vs 2.8 embryos) and a lower CLBR (29.4% vs 35.0%). Multiple regression analysis showed that the CLBR in the PGT-M group was significantly influenced by female age, the number of previous ART cycles, the number of oocytes and the dose of ovarian stimulation. In both groups, the predicted CLBR increased with increasing numbers of oocytes and suitable embryos. At least two retrieved oocytes or one embryo per single PGT-M cycle could confer an estimated CLBR above 10%. By assessing female age and the number of retrieved oocytes together, it was shown that for all women aged ≤40 years, the predicted CLBR per single PGT-M cycle was ≥10% when the number of oocytes was ≥7 or was ≥5% when the number of oocytes was ≥3. LIMITATIONS, REASONS FOR CAUTION Despite the large sample size, the findings are confined by limited confounder adjustment and the lack of specific PGT-M comparators. WIDER IMPLICATIONS OF THE FINDINGS This study aimed to describe the likelihood of success of PGT-M treatment, measured as CLBR, based on various patient demographics. In a PGT-M program, couples need to be informed of the prognosis more specifically when it is futile. The table of predicted CLBRs presented in this study is a useful tool in counselling PGT-M couples for making reproductive choices. STUDY FUNDING/COMPETING INTEREST(S) No funding was required and there are no competing interests. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- A Van Der Kelen
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
| | - S Santos-Ribeiro
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium.,Department of Obstetrics and Gynecology, IVIRMA Lisboa, Lisbon, Portugal
| | - A De Vos
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
| | - P Verdyck
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
| | - M De Rycke
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
| | - V Berckmoes
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
| | - H Tournaye
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium.,Department of Obstetrics, Gynecology, Perinatology and Reproduction, Institute of Professional Education, Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, Moscow, Russia
| | - C Blockeel
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium.,Department of Obstetrics and Gynaecology, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - M De Vos
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium.,Department of Obstetrics, Gynecology, Perinatology and Reproduction, Institute of Professional Education, Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation, Moscow, Russia
| | - F J Hes
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
| | - K Keymolen
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
| | - W Verpoest
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Centre for Medical Genetics, Brussels, Belgium
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23
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Chen S, Yin X, Zhang S, Xia J, Liu P, Xie P, Yan H, Liang X, Zhang J, Chen Y, Fei H, Zhang L, Hu Y, Jiang H, Lin G, Chen F, Xu C. Comprehensive preimplantation genetic testing by massively parallel sequencing. Hum Reprod 2021; 36:236-247. [PMID: 33306794 DOI: 10.1093/humrep/deaa269] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 11/25/2019] [Revised: 09/15/2020] [Indexed: 11/14/2022] Open
Abstract
STUDY QUESTION Can whole genome sequencing (WGS) offer a relatively cost-effective approach for embryonic genome-wide haplotyping and preimplantation genetic testing (PGT) for monogenic disorders (PGT-M), aneuploidy (PGT-A) and structural rearrangements (PGT-SR)? SUMMARY ANSWER Reliable genome-wide haplotyping, PGT-M, PGT-A and PGT-SR could be performed by WGS with 10× depth of parental and 4× depth of embryonic sequencing data. WHAT IS KNOWN ALREADY Reduced representation genome sequencing with a genome-wide next-generation sequencing haplarithmisis-based solution has been verified as a generic approach for automated haplotyping and comprehensive PGT. Several low-depth massively parallel sequencing (MPS)-based methods for haplotyping and comprehensive PGT have been developed. However, an additional family member, such as a sibling, or a proband, is required for PGT-M haplotyping using low-depth MPS methods. STUDY DESIGN, SIZE, DURATION In this study, 10 families that had undergone traditional IVF-PGT and 53 embryos, including 13 embryos from two PGT-SR families and 40 embryos from eight PGT-M families, were included to evaluate a WGS-based method. There were 24 blastomeres and 29 blastocysts in total. All embryos were used for PGT-A. Karyomapping validated the WGS results. Clinical outcomes of the 10 families were evaluated. PARTICIPANTS/MATERIALS, SETTING, METHODS A blastomere or a few trophectoderm cells from the blastocyst were biopsied, and multiple displacement amplification (MDA) was performed. MDA DNA and bulk DNA of family members were used for library construction. Libraries were sequenced, and data analysis, including haplotype inheritance deduction for PGT-M and PGT-SR and read-count analysis for PGT-A, was performed using an in-house pipeline. Haplotyping with a proband and parent-only haplotyping without additional family members were performed to assess the WGS methodology. Concordance analysis between the WGS results and traditional PGT methods was performed. MAIN RESULTS AND THE ROLE OF CHANCE For the 40 PGT-M and 53 PGT-A embryos, 100% concordance between the WGS and single-nucleotide polymorphism (SNP)-array results was observed, regardless of whether additional family members or a proband was included for PGT-M haplotyping. For the 13 embryos from the two PGT-SR families, the embryonic balanced translocation was detected and 100% concordance between WGS and MicroSeq with PCR-seq was demonstrated. LIMITATIONS, REASONS FOR CAUTION The number of samples in this study was limited. In some cases, the reference embryo for PGT-M or PGT-SR parent-only haplotyping was not available owing to failed direct genotyping. WIDER IMPLICATIONS OF THE FINDINGS WGS-based PGT-A, PGT-M and PGT-SR offered a comprehensive PGT approach for haplotyping without the requirement for additional family members. It provided an improved complementary method to PGT methodologies, such as low-depth MPS- and SNP array-based methods. STUDY FUNDING/COMPETING INTEREST(S) This research was supported by the research grant from the National Key R&D Program of China (2018YFC0910201 and 2018YFC1004900), the Guangdong province science and technology project of China (2019B020226001), the Shenzhen Birth Defect Screening Project Lab (JZF No. [2016] 750) and the Shenzhen Municipal Government of China (JCYJ20170412152854656). This work was also supported by the National Natural Science Foundation of China (81771638, 81901495 and 81971344), the National Key R&D Program of China (2018YFC1004901 and 2016YFC0905103), the Shanghai Sailing Program (18YF1424800), the Shanghai Municipal Commission of Science and Technology Program (15411964000) and the Shanghai 'Rising Stars of Medical Talent' Youth Development Program Clinical Laboratory Practitioners Program (201972). The authors declare no competing interests. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Songchang Chen
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Municipal Key Clinical Specialty, Shanghai, China.,Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Xuyang Yin
- MGI, BGI-Shenzhen, Shenzhen, China.,BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, China.,China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | | | - Jun Xia
- MGI, BGI-Shenzhen, Shenzhen, China.,BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, China.,China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Ping Liu
- MGI, BGI-Shenzhen, Shenzhen, China.,BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, China.,China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Pingyuan Xie
- CITIC-Xiangya Reproductive & Genetic Hospital, Changsha, China
| | | | | | - Junyu Zhang
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Municipal Key Clinical Specialty, Shanghai, China.,Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Yiyao Chen
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Municipal Key Clinical Specialty, Shanghai, China.,Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Hongjun Fei
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Municipal Key Clinical Specialty, Shanghai, China.,Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Lanlan Zhang
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Municipal Key Clinical Specialty, Shanghai, China.,Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
| | - Yuting Hu
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hui Jiang
- MGI, BGI-Shenzhen, Shenzhen, China.,BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, China.,China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Ge Lin
- CITIC-Xiangya Reproductive & Genetic Hospital, Changsha, China
| | - Fang Chen
- MGI, BGI-Shenzhen, Shenzhen, China.,BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, China.,China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Chenming Xu
- The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Municipal Key Clinical Specialty, Shanghai, China.,Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
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24
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Maganti HB, Bailey AJM, Kirkham AM, Shorr R, Pineault N, Allan DS. Persistence of CRISPR/Cas9 gene edited hematopoietic stem cells following transplantation: A systematic review and meta-analysis of preclinical studies. Stem Cells Transl Med 2021; 10:996-1007. [PMID: 33666363 PMCID: PMC8235122 DOI: 10.1002/sctm.20-0520] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 01/14/2021] [Accepted: 01/24/2021] [Indexed: 12/13/2022] Open
Abstract
Gene editing blood‐derived cells is an attractive approach to cure selected monogenic diseases but remains experimental. A systematic search of preclinical controlled studies is needed to determine the persistence of edited cells following reinfusion. All studies identified in our systematic search (to 20 October 2020) examining the use of CRISPR/Cas9 gene editing in blood‐derived cells for transplantation were included. Meta‐analysis was performed to determine the engraftment and persistence of gene edited cells. A total of 3538 preclinical studies were identified with 15 published articles meeting eligibility for meta‐analysis. These in vivo animal studies examined editing of hemoglobin to correct sickle cell disease (eight studies), inducing resistance to acquired immunodeficiency syndrome (two studies), and six other monogenic disorders (single studies). CRISPR‐Cas9 edited hematopoietic stem and progenitor cells demonstrated equivalent early engraftment compared to controls in meta‐analysis but persistence of gene‐edited cells was reduced at later time points and in secondary transplant recipients. Subgroup analysis in studies targeting the hemoglobin gene revealed a significant reduction in the persistence of gene‐edited cells whether homology‐directed repair or nonhomologous end‐joining were used. No adverse side effects were reported. Significant heterogeneity in study design and outcome reporting was observed and the potential for bias was identified in all studies. CRISPR‐Cas9 gene edited cells engraft similarly to unedited hematopoietic cells. Persistence of gene edited cells, however, remains a challenge and improved methods of targeting hematopoietic stem cells are needed. Reducing heterogeneity and potential risk of bias will hasten the development of informative clinical trials.
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Affiliation(s)
- Harinad B Maganti
- Canadian Blood Services, Stem Cells and Centre for Innovation, Ottawa, Ontario, Canada.,Clinical Epidemiology & Regenerative Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Adrian J M Bailey
- Canadian Blood Services, Stem Cells and Centre for Innovation, Ottawa, Ontario, Canada.,Clinical Epidemiology & Regenerative Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Aidan M Kirkham
- Canadian Blood Services, Stem Cells and Centre for Innovation, Ottawa, Ontario, Canada
| | - Risa Shorr
- Information Services, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Nicolas Pineault
- Canadian Blood Services, Stem Cells and Centre for Innovation, Ottawa, Ontario, Canada
| | - David S Allan
- Canadian Blood Services, Stem Cells and Centre for Innovation, Ottawa, Ontario, Canada.,Clinical Epidemiology & Regenerative Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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25
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Kausthubham N, Shukla A, Gupta N, Bhavani GS, Kulshrestha S, Das Bhowmik A, Moirangthem A, Bijarnia-Mahay S, Kabra M, Puri RD, Mandal K, Verma IC, Bielas SL, Phadke SR, Dalal A, Girisha KM. A data set of variants derived from 1455 clinical and research exomes is efficient in variant prioritization for early-onset monogenic disorders in Indians. Hum Mutat 2021; 42:e15-e61. [PMID: 33502066 PMCID: PMC10052794 DOI: 10.1002/humu.24172] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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: 11/02/2020] [Revised: 01/05/2021] [Accepted: 01/24/2021] [Indexed: 12/16/2022]
Abstract
Given the genomic uniqueness, a local data set is most desired for Indians, who are underrepresented in existing public databases. We hypothesize patients with rare monogenic disorders and their family members can provide a reliable source of common variants in the population. Exome sequencing (ES) data from families with rare Mendelian disorders was aggregated from five centers in India. The dataset was refined by excluding related individuals and removing the disease-causing variants (refined cohort). The efficiency of these data sets was assessed in a new set of 50 exomes against gnomAD and GenomeAsia. Our original cohort comprised 1455 individuals from 1203 families. The refined cohort had 836 unrelated individuals that retained 1,251,064 variants with 181,125 population-specific and 489,618 common variants. The allele frequencies from our cohort helped to define 97,609 rare variants in gnomAD and 44,520 rare variants in GenomeAsia as common variants in our population. Our variant dataset provided an additional 1.7% and 0.1% efficiency for prioritizing heterozygous and homozygous variants respectively for rare monogenic disorders. We observed additional 19 genes/human knockouts. We list carrier frequency for 142 recessive disorders. This is a large and useful resource of exonic variants for Indians. Despite limitations, datasets from patients are efficient tools for variant prioritization in a resource-limited setting.
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Affiliation(s)
- Neethukrishna Kausthubham
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Anju Shukla
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Neerja Gupta
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Gandham S Bhavani
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Samarth Kulshrestha
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Aneek Das Bhowmik
- Division of Diagnostics, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India.,ASPIRE (Diagnostics Facility), CSIR-Centre for Cellular & Molecular Biology, CCMB Annexe II, Hyderabad, India
| | - Amita Moirangthem
- Department of Medical Genetics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Sunita Bijarnia-Mahay
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Madhulika Kabra
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, India
| | - Ratna D Puri
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Kausik Mandal
- Department of Medical Genetics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Ishwar C Verma
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Stephanie L Bielas
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Shubha R Phadke
- Department of Medical Genetics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Ashwin Dalal
- Division of Diagnostics, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India
| | - Katta M Girisha
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
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26
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Coonen E, van Montfoort A, Carvalho F, Kokkali G, Moutou C, Rubio C, De Rycke M, Goossens V. ESHRE PGT Consortium data collection XVI-XVIII: cycles from 2013 to 2015. Hum Reprod Open 2020; 2020:hoaa043. [PMID: 33033756 PMCID: PMC7532546 DOI: 10.1093/hropen/hoaa043] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/03/2020] [Indexed: 02/05/2023] Open
Abstract
STUDY QUESTION What are the trends and developments in preimplantation genetic testing (PGT) in 2013–2015 as compared to previous years? SUMMARY ANSWER The main trends observed in the retrospective data collections 2013–2015, representing valuable data on PGT activity in (mainly) Europe, are the increased application of trophectoderm biopsy at the cost of cleavage stage biopsy and the continuing expansion of comprehensive testing technology in PGT for chromosomal structural rearrangements and for aneuploidies (PGT-SR and PGT-A). WHAT IS KNOWN ALREADY Since it was established in 1997, the ESHRE PGT Consortium has been collecting data from international PGT centres. To date, 15 data sets and an overview of the first 10 years of data collections have been published. STUDY DESIGN, SIZE, DURATION Collection of (mainly) European data by the PGT Consortium for ESHRE. The data for PGT cycles performed between 1 January 2013 and 31 December 2015 were provided by participating centres on a voluntary basis. For the collection of cycle, pregnancy and baby data, separate, pre-designed MS Excel tables were used. PARTICIPANTS/MATERIALS, SETTING, METHODS Data were submitted by 59, 60 and 59 centres respectively for 2013, 2014 and 2015 (full PGT Consortium members). Records with incomplete or inconsistent data were excluded from the calculations. Corrections, calculations, figures and tables were made by expert co-authors. MAIN RESULTS AND THE ROLE OF CHANCE For data collection XVI/XVII/XVIII, 59/60/59 centres reported data on 8164/9769/11 120 cycles with oocyte retrieval: 5020/6278/7155 cycles for PGT-A, 2026/2243/2661 cycles for PGT for monogenic/single gene defects, 1039/1189/1231 cycles for PGT-SR and 79/59/73 cycles for sexing for X-linked diseases. From 2013 until 2015, the uptake of biopsy at the blastocyst stage was mainly observed in cycles for PGT-A (from 23% to 36%) and PGT-SR (from 22% to 36%), alongside the increased application of comprehensive testing technology (from 66% to 75% in PGT-A and from 36% to 58% in PGT-SR). LIMITATIONS, REASONS FOR CAUTION The findings apply to the 59/60/59 participating centres and may not represent worldwide trends in PGT. Data were collected retrospectively and no details of the follow-up on PGT pregnancies and babies born were provided. WIDER IMPLICATIONS OF THE FINDINGS Being the largest data collection on PGT worldwide, detailed information about ongoing developments in the field is provided. STUDY FUNDING/COMPETING INTEREST(S) The study has no external funding and all costs are covered by ESHRE. There are no competing interests declared. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- E Coonen
- Department of Clinical Genetics, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, The Netherlands.,Department of Obstetrics & Gynaecology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - A van Montfoort
- Department of Clinical Genetics, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, The Netherlands.,Department of Obstetrics & Gynaecology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - F Carvalho
- Genetics-Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal.,i3s-Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal
| | - G Kokkali
- Reproductive Medicine Unit, Genesis Athens Clinic, Athens, Greece
| | - C Moutou
- Université de Strasbourg, Hôpitaux Universitaires de Strasbourg, Laboratoire de Diagnostic préimplantatoire, CMCO, Schiltigheim, France
| | - C Rubio
- PGT-A Research, Igenomix, Valencia, Spain
| | - M De Rycke
- Centre for Medical Genetics, UZ Brussel, Brussels, Belgium
| | - V Goossens
- ESHRE Central Office, Grimbergen, Belgium
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27
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Sennaiyan UN, Phani NM, Deepak V, Appaswamy G, Krishna MR. Massive parallel sequencing of dried umbilical cord remnants. Am J Med Genet A 2020; 182:2778-2780. [PMID: 32902111 DOI: 10.1002/ajmg.a.61850] [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: 08/15/2020] [Revised: 08/19/2020] [Accepted: 08/19/2020] [Indexed: 11/08/2022]
Abstract
Genetic diagnosis depends on having available tissue to test. This can be important for many reasons, such as related to familial diagnosis in the case of another pregnancy. When blood or DNA samples from affected family members are not available, accurate prenatal diagnosis may be much more difficult and hence additional effort may be needed to obtain a genetic diagnosis in such families. We report two families with suspected monogenic disorders where attempts were made to establish the genetic etiology in deceased offspring using dried umbilical cord remnants which had been preserved by the family.
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Affiliation(s)
| | | | - Vuppu Deepak
- Life cell Diagnostics Pvt Ltd, Chennai, Tamil Nadu, India
| | | | - Mani Ram Krishna
- Dr R.K. Hospital for Women and Children, Thanjavur, Tamil Nadu, India
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28
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Carvalho F, Moutou C, Dimitriadou E, Dreesen J, Giménez C, Goossens V, Kakourou G, Vermeulen N, Zuccarello D, De Rycke M. ESHRE PGT Consortium good practice recommendations for the detection of monogenic disorders. Hum Reprod Open 2020; 2020:hoaa018. [PMID: 32500103 PMCID: PMC7257022 DOI: 10.1093/hropen/hoaa018] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 02/10/2020] [Indexed: 02/07/2023] Open
Abstract
The field of preimplantation genetic testing (PGT) is evolving fast and best practice advice is essential for regulation and standardisation of diagnostic testing. The previous ESHRE guidelines on best practice for PGD, published in 2005 and 2011, are considered outdated, and the development of new papers outlining recommendations for good practice in PGT was necessary. The current paper provides recommendations on the technical aspects of PGT for monogenic/single-gene defects (PGT-M) and covers recommendations on basic methods for PGT-M and testing strategies. Furthermore, some specific recommendations are formulated for special cases, including de novo pathogenic variants, consanguineous couples, HLA typing, exclusion testing and disorders caused by pathogenic variants in the mitochondrial DNA. This paper is one of a series of four papers on good practice recommendations on PGT. The other papers cover the organisation of a PGT centre, embryo biopsy and tubing and the technical aspects of PGT for chromosomal structural rearrangements/aneuploidies. Together, these papers should assist scientists interested in PGT in developing the best laboratory and clinical practice possible.
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Affiliation(s)
| | - Filipa Carvalho
- Genetics – Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal
- i3s – Instituto de Investigação e Inovação em Saúde, University of Porto, Porto, Portugal
| | - Céline Moutou
- Université de Strasbourg, Strasbourg, France
- Laboratoire de Diagnostic Préimplantatoire, Hôpitaux Universitaires de Strasbourg, Schiltigheim, France
| | - Eftychia Dimitriadou
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, KU Leuven, O&N I Herestraat 49, Leuven, Belgium
| | - Jos Dreesen
- Department of Clinical Genetics, Maastricht University Medical Centre, Maastricht, The Netherlands
- School for Oncology and Developmental Biology, GROW, Maastricht University, Maastricht, The Netherlands
| | | | | | - Georgia Kakourou
- National and Kapodistrian University of Athens, Athens, Greece
- Department of Medical Genetics, ‘Aghia Sophia’ Children’s Hospital, Athens, Greece
| | | | - Daniela Zuccarello
- Department of Lab Medicine, Unit of Clinical Genetics and Epidemiology, University Hospital of Padova, Padova, Italy
| | - Martine De Rycke
- Centre for Medical Genetics, Universitair Ziekenhuis Brussel, Brussels, Belgium
- Reproduction and Genetics, Vrije Universiteit Brussel (VUB), Brussels Belgium
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29
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Abstract
Maintaining mitochondrial health is emerging as a keystone in aging and associated diseases. The selective degradation of mitochondria by mitophagy is of particular importance in keeping a pristine mitochondrial pool. Indeed, inherited monogenic diseases with defects in mitophagy display complex multisystem pathologies but particularly progressive neurodegeneration. Fortunately, therapies are being developed that target mitophagy allowing new hope for treatments for previously incurable diseases. Herein, we describe mitophagy and associated diseases, coin the term mitophaging and describe new small molecule interventions that target different steps in the mitophagic pathway. Consequently, several age-associated diseases may be treated by targeting mitophagy.
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Affiliation(s)
- Daniela Bakula
- Department of Cellular and Molecular Medicine, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - Morten Scheibye-Knudsen
- Department of Cellular and Molecular Medicine, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
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30
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Doble B, Schofield D, Evans CA, Groza T, Mattick JS, Field M, Roscioli T. Impacts of genomics on the health and social costs of intellectual disability. J Med Genet 2020; 57:479-486. [PMID: 31980565 DOI: 10.1136/jmedgenet-2019-106445] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 07/16/2019] [Revised: 12/17/2019] [Accepted: 01/03/2020] [Indexed: 11/03/2022]
Abstract
BACKGROUND This study provides an integrated assessment of the economic and social impacts of genomic sequencing for the detection of monogenic disorders resulting in intellectual disability (ID). METHODS Multiple knowledge bases were cross-referenced and analysed to compile a reference list of monogenic disorders associated with ID. Multiple literature searches were used to quantify the health and social costs for the care of people with ID. Health and social expenditures and the current cost of whole-exome sequencing and whole-genome sequencing were quantified in relation to the more common causes of ID and their impact on lifespan. RESULTS On average, individuals with ID incur annual costs in terms of health costs, disability support, lost income and other social costs of US$172 000, accumulating to many millions of dollars over a lifetime. CONCLUSION The diagnosis of monogenic disorders through genomic testing provides the opportunity to improve the diagnosis and management, and to reduce the costs of ID through informed reproductive decisions, reductions in unproductive diagnostic tests and increasingly targeted therapies.
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Affiliation(s)
- Brett Doble
- Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia .,Programme in Health Services and Systems Research, Duke-NUS Medical School, Singapore
| | - Deborah Schofield
- Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.,GenImpact, School of Economics, Faculty of Business and Economics, Macquarie University, Sydney, New South Wales, Australia
| | - Carey-Anne Evans
- Neuroscience Research Australia, Prince of Wales Clinical School, University of New South Wales, Randwick, New South Wales, Australia
| | - Tudor Groza
- Pryzm Health, Gold Coast, Queensland, Australia
| | - John S Mattick
- Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.,St Vincent's Clinical School, University of New South Wales, Sydney, New South Wales, Australia
| | - Mike Field
- The Genetics of Learning Disability Service, Waratah, New South Wales, Australia
| | - Tony Roscioli
- Neuroscience Research Australia, Prince of Wales Clinical School, University of New South Wales, Randwick, New South Wales, Australia.,NSW Health Pathology East Laboratory, Prince of Wales Private Hospital, Randwick, New South Wales, Australia
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31
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Mone F, Quinlan-Jones E, Ewer AK, Kilby MD. Exome sequencing in the assessment of congenital malformations in the fetus and neonate. Arch Dis Child Fetal Neonatal Ed 2019; 104:F452-F456. [PMID: 30816854 DOI: 10.1136/archdischild-2018-316352] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 12/31/2018] [Accepted: 01/02/2019] [Indexed: 11/03/2022]
Abstract
Major congenital anomalies are often associated with perinatal mortality, long-term morbidity and prolonged hospitalisation. Prenatal ultrasound remains the principle diagnostic test for many anomalies, but despite this up to one-third are only identified in the neonatal period. The primary step in determining underlying aetiology is to define accurately the phenotype by recognition of dysmorphology (both prenatally and postnatally). The potential introduction of next-generation sequencing, primarily through exome sequencing, into perinatal practice may improve the pathological diagnostic yield. However, clinicians must understand both the benefit and potential harms of this technology in facilitating the discovery of relevant pathogenic variants in the diagnosis and management of congenital malformations.
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Affiliation(s)
- Fionnuala Mone
- Department of Clinical Genetics, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK.,West Midlands Fetal Medicine Centre, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Elizabeth Quinlan-Jones
- Department of Clinical Genetics, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK.,West Midlands Fetal Medicine Centre, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Andrew K Ewer
- Neonatal Unit, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK.,Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
| | - Mark D Kilby
- West Midlands Fetal Medicine Centre, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK.,Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
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32
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Yang X, Zhou Q, Zhou W, Zhong M, Guo X, Wang X, Fan X, Yan S, Li L, Lai Y, Wang Y, Huang J, Ye Y, Zeng H, Chuan J, Du Y, Ma C, Li P, Song Z, Xu X. A Cell-free DNA Barcode-Enabled Single-Molecule Test for Noninvasive Prenatal Diagnosis of Monogenic Disorders: Application to β-Thalassemia. Adv Sci (Weinh) 2019; 6:1802332. [PMID: 31179213 PMCID: PMC6548944 DOI: 10.1002/advs.201802332] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/14/2019] [Indexed: 05/13/2023]
Abstract
Noninvasive prenatal testing of common aneuploidies has become routine over the past decade, but testing of monogenic disorders remains a challenge in clinical implementation. Most recent studies have inherent limitations, such as complicated procedures, a lack of versatility, and the need for prior knowledge of parental genotypes or haplotypes. To overcome these limitations, a robust and versatile next-generation sequencing-based cell-free DNA (cfDNA) allelic molecule counting system termed cfDNA barcode-enabled single-molecule test (cfBEST) is developed for the noninvasive prenatal diagnosis (NIPD) of monogenic disorders. The accuracy of cfBEST is found to be comparable to that of droplet digital polymerase chain reaction (ddPCR) in detecting low-abundance mutations in cfDNA. The analytical validity of cfBEST is evidenced by a β-thalassemia assay, in which a blind validation study of 143 at-risk pregnancies reveals a sensitivity of 99.19% and a specificity of 99.92% on allele detection. Because the validated cfBEST method can be used to detect maternal-fetal genotype combinations in cfDNA precisely and quantitatively, it holds the potential for the NIPD of human monogenic disorders.
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Affiliation(s)
- Xingkun Yang
- Department of Medical GeneticsSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong510515China
- Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic DiseasesGuangzhouGuangdong510515China
- Affiliated Foshan Maternity & Child Healthcare HospitalSouthern Medical UniversityFoshanGuangdong528000China
- Guangdong Key Laboratory of Biological ChipGuangzhouGuangdong510515China
| | - Qinghua Zhou
- The Center for Precision Medicine of First Affiliated HospitalBiomedical Translational Research InstituteSchool of PharmacyJinan UniversityGuangzhouGuangdong510632China
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Wanjun Zhou
- Department of Medical GeneticsSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong510515China
- Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic DiseasesGuangzhouGuangdong510515China
- Guangdong Key Laboratory of Biological ChipGuangzhouGuangdong510515China
| | - Mei Zhong
- Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong510515China
| | - Xiaoling Guo
- Affiliated Foshan Maternity & Child Healthcare HospitalSouthern Medical UniversityFoshanGuangdong528000China
| | - Xiaofeng Wang
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Xin Fan
- Guangxi Zhuang Autonomous Region Women and Children Care HospitalNanningGuangxi530000China
| | - Shanhuo Yan
- Qinzhou Maternity & Child Healthcare HospitalQinzhouGuangxi535000China
| | - Liyan Li
- Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong510515China
| | - Yunli Lai
- Guangxi Zhuang Autonomous Region Women and Children Care HospitalNanningGuangxi530000China
| | - Yongli Wang
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Jin Huang
- Department of Medical GeneticsSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong510515China
- Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic DiseasesGuangzhouGuangdong510515China
- Guangdong Key Laboratory of Biological ChipGuangzhouGuangdong510515China
| | - Yuhua Ye
- Department of Medical GeneticsSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong510515China
- Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic DiseasesGuangzhouGuangdong510515China
- Guangdong Key Laboratory of Biological ChipGuangzhouGuangdong510515China
| | - Huaping Zeng
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Jun Chuan
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Yuanping Du
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Chouxian Ma
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Peining Li
- Department of GeneticsYale UniversityNew HavenCT06520USA
| | - Zhuo Song
- Hunan Research Center for Big Data Application in GenomicsGenetalks Inc.ChangshaHunan410152China
| | - Xiangmin Xu
- Department of Medical GeneticsSchool of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong510515China
- Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic DiseasesGuangzhouGuangdong510515China
- Guangdong Key Laboratory of Biological ChipGuangzhouGuangdong510515China
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Charbit-Henrion F, Parlato M, Hanein S, Duclaux-Loras R, Nowak J, Begue B, Rakotobe S, Bruneau J, Fourrage C, Alibeu O, Rieux-Laucat F, Lévy E, Stolzenberg MC, Mazerolles F, Latour S, Lenoir C, Fischer A, Picard C, Aloi M, Dias JA, Hariz MB, Bourrier A, Breuer C, Breton A, Bronsky J, Buderus S, Cananzi M, Coopman S, Crémilleux C, Dabadie A, Dumant-Forest C, Gurkan OE, Fabre A, Fischer A, Diaz MG, Gonzalez-Lama Y, Goulet O, Guariso G, Gurcan N, Homan M, Hugot JP, Jeziorski E, Karanika E, Lachaux A, Lewindon P, Lima R, Magro F, Major J, Malamut G, Mas E, Mattyus I, Mearin LM, Melek J, Navas-Lopez VM, Paerregaard A, Pelatan C, Pigneur B, Pais IP, Rebeuh J, Romano C, Siala N, Strisciuglio C, Tempia-Caliera M, Tounian P, Turner D, Urbonas V, Willot S, Ruemmele FM, Cerf-Bensussan N. Diagnostic Yield of Next-generation Sequencing in Very Early-onset Inflammatory Bowel Diseases: A Multicentre Study. J Crohns Colitis 2018; 12:1104-1112. [PMID: 29788237 PMCID: PMC6113703 DOI: 10.1093/ecco-jcc/jjy068] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 03/14/2018] [Accepted: 05/16/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS An expanding number of monogenic defects have been identified as causative of severe forms of very early-onset inflammatory bowel diseases [VEO-IBD]. The present study aimed at defining how next-generation sequencing [NGS] methods can be used to improve identification of known molecular diagnosis and to adapt treatment. METHODS A total of 207 children were recruited in 45 paediatric centres through an international collaborative network [ESPGHAN GENIUS working group] with a clinical presentation of severe VEO-IBD [n = 185] or an anamnesis suggestive of a monogenic disorder [n = 22]. Patients were divided at inclusion into three phenotypic subsets: predominantly small bowel inflammation, colitis with perianal lesions, and colitis only. Methods to obtain molecular diagnosis included functional tests followed by specific Sanger sequencing, custom-made targeted NGS, and in selected cases whole exome sequencing [WES] of parents-child trios. Genetic findings were validated clinically and/or functionally. RESULTS Molecular diagnosis was achieved in 66/207 children [32%]: 61% with small bowel inflammation, 39% with colitis and perianal lesions, and 18% with colitis only. Targeted NGS pinpointed gene mutations causative of atypical presentations, and identified large exonic copy number variations previously missed by WES. CONCLUSIONS Our results lead us to propose an optimised diagnostic strategy to identify known monogenic causes of severe IBD.
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Affiliation(s)
- Fabienne Charbit-Henrion
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Paediatric Gastroenterology, Hepatology and Nutrition Unit, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Marianna Parlato
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Sylvain Hanein
- INSERM, UMR 1163 Translational Genetic, and Imagine Institute, Paris, France
| | - Rémi Duclaux-Loras
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Jan Nowak
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatric Gastroenterology and Metabolic Diseases, Poznan University of Medical Sciences, Poznan, Poland
| | - Bernadette Begue
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Sabine Rakotobe
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Julie Bruneau
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Pathology Department, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Cécile Fourrage
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Bioinformatics Platform, Imagine Institute Paris, France
| | - Olivier Alibeu
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Genomic Platform, Imagine Institute, Paris, France
| | - Frédéric Rieux-Laucat
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,INSERM, UMR1163, Immunogenetics of Paediatric Autoimmunity, and Imagine Institute, Paris, France
| | - Eva Lévy
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,INSERM, UMR1163, Immunogenetics of Paediatric Autoimmunity, and Imagine Institute, Paris, France
| | - Marie-Claude Stolzenberg
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,INSERM, UMR1163, Immunogenetics of Paediatric Autoimmunity, and Imagine Institute, Paris, France
| | - Fabienne Mazerolles
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,INSERM, UMR1163, Immunogenetics of Paediatric Autoimmunity, and Imagine Institute, Paris, France
| | - Sylvain Latour
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,INSERM, UMR1163, Lymphocyte activation and EBV susceptibility, and Imagine Institute, Paris, France
| | - Christelle Lenoir
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,INSERM, UMR1163, Lymphocyte activation and EBV susceptibility, and Imagine Institute, Paris, France
| | - Alain Fischer
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Collège de France, Médecine expérimentale, Paris, France,INSERM UMR 1163 and Imagine Institute, Paris, France
| | - Capucine Picard
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,INSERM, UMR1163, Lymphocyte activation and EBV susceptibility, and Imagine Institute, Paris, France,Investigation Centre for Immunodeficiency, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris and Imagine Institute, Paris, France
| | - Marina Aloi
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Sapienza University of Rome, Paediatric Gastroenterology and Liver Unit, Department of Pediatrics, Rome, Italy
| | - Jorge Amil Dias
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centro Hospitalar São João, Porto, Portugal
| | - Mongi Ben Hariz
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Hopital La Marsa, Tunisia
| | - Anne Bourrier
- Department of Gastroenterology, Hôpital St Antoine, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Christian Breuer
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Universitätsklinikum Hamburg, Hamburg, Germany
| | - Anne Breton
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Gastroenterology, Hepatology, Nutrition, and Diabetes, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Jiri Bronsky
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],University Hospital Motol, Prague, Czech Republic
| | - Stephan Buderus
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],St. Marien Hospital, Bonn, Germany
| | - Mara Cananzi
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Unit of Paediatric Hepatology, Department of Woman and Child Health, University Hospital of Padova, Padova, Italy
| | - Stéphanie Coopman
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Division of Gastroenterology, Hepatology and Nutrition, Department of Paediatrics, Jeanne De Flandre Children’s Hospital, Lille University Faculty of Medicine, Lille, France
| | - Clara Crémilleux
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centre Hospitalo-Universitaire de St-Etienne, St-Etienne, France
| | - Alain Dabadie
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Service de médecine de l’enfant et de l’adolescent, Hôpital Sud – Centre Hospitalo-Universitaire de Rennes, Rennes, France
| | - Clémentine Dumant-Forest
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centre Hospitalo-Universitaire Charles Nicolle, Rouen, France
| | - Odul Egritas Gurkan
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Paediatric Gastroenterology, Hepatology and Nutrition, Gazi University, Ankara, Turkey
| | - Alexandre Fabre
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Assistance publique Hôpitaux de Marseille, Hôpital de la Timone, Marseille, France
| | - Aude Fischer
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centre Hospitalo-Universitaire Sud Réunion, St Pierre, France
| | - Marta German Diaz
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Unit of Paediatric Nutrition, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Yago Gonzalez-Lama
- Inflammatory Bowel Disease Unit, Hospital Universitario Puerta de Hierro–Majadahonda, Madrid, Spain
| | - Olivier Goulet
- Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Paediatric Gastroenterology, Hepatology and Nutrition Unit, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Graziella Guariso
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],University of Padua, Italy
| | - Neslihan Gurcan
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Paediatric Gastroenterology, Hepatology and Nutrition, Gazi University, Ankara, Turkey
| | - Matjaz Homan
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Gastroenterology, Hepatology and Nutrition, University Children’s Hospital, Ljubljana, Slovenia
| | - Jean-Pierre Hugot
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Departments of Paediatric Digestive and Respiratory Diseases, Hôpital Robert-Debré, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Eric Jeziorski
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Infectious diseases and Immunology, Centre Hospitalo-Universitaire de Montpellier, Montpellier, France
| | - Evi Karanika
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, University General Hospital of Thessaloniki, Thessaloniki, Greece
| | - Alain Lachaux
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatric Gastroenterology, Hepatology and Nutrition, Centre de Nutrition parentérale à domicile, Hôpital Femme–Mère–Enfant CHU de Lyon HCL - GH Est, Bron, France
| | - Peter Lewindon
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Gastroenterology and Hepatology, Lady Cilento Children’s Hospital and the Faculty of Medicine and Biomedical Sciences, TUniversity of Queensland, Brisbane, Australia
| | - Rosa Lima
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centro Hospitalar São João, Porto, Portugal
| | - Fernando Magro
- Gastroenterology Department, Hospital de São João, Institute of Pharmacology and Therapeutics Faculty of Medicine and MedInUP - Centre for Drug Discovery and Innovative Medicines, University of Porto, Porto, Portugal
| | - Janos Major
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],MRE Bethesda Gyermekkórháza; Department of Pediatrics, Budapest, Hungary
| | - Georgia Malamut
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Department of Gastroenterology, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Emmanuel Mas
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Gastroenterology, Hepatology, Nutrition, and Diabetes, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Istvan Mattyus
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Semmelweis University; Department of Paediatrics, Budapest, Hungary
| | - Luisa M Mearin
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Leiden University Medical Centre, Department of Paediatrics, Leiden, The Netherlands
| | - Jan Melek
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],University Hospital, Hradec Kralove, Czech Republic
| | - Victor Manuel Navas-Lopez
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Hospital Regional Universitario de Málaga, Departamento de Pediatría, Malaga, Spain
| | - Anders Paerregaard
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Hvidovre University Hospital, Department of Paediatrics, Copenhagen, Denmark
| | - Cecile Pelatan
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centre Hospitalier du Mans, Le Mans, France
| | - Bénédicte Pigneur
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Paediatric Gastroenterology, Hepatology and Nutrition Unit, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Isabel Pinto Pais
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Centro Hospitalar Gaia Espinho, Department of Paediatrics, Vila Nova de Gaia, Portugal
| | - Julie Rebeuh
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centre Hospitalo-Universitaire de Strasbourg, Strasbourg, France
| | - Claudio Romano
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Hospital of Messina, University of Messina, Messina, Italy
| | - Nadia Siala
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Hôpital Mongi Slim, La Marsa, Tunisia
| | - Caterina Strisciuglio
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Woman, Child and General and Specialized Surgery, Second University of Naples, Naples, Italy
| | - Michela Tempia-Caliera
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, FMH Pédiatrie et FA Gastroentérologie et hépatologie, Clinique des Grangettes, Geneva, Switzerland
| | - Patrick Tounian
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatric Nutrition and Gastroenterology, Hôpital Armand Trousseau, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Dan Turner
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Shaare Zedek Medical Centre, Jerusalem, Israel
| | - Vaidotas Urbonas
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatric Gastroenterology, Vilnius University Clinic for Children’s Diseases, Vilnius, Lithuania
| | - Stéphanie Willot
- GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Department of Paediatrics, Centre hospitalier régional universitaire, Hôpital Clocheville, Tours, France
| | - Frank M Ruemmele
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,Paediatric Gastroenterology, Hepatology and Nutrition Unit, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN]
| | - Nadine Cerf-Bensussan
- INSERM, UMR1163, Laboratory of Intestinal Immunity, and Imagine Institute, Paris, France,Université Paris Descartes-Sorbonne Paris Cité, Paris, France,GENIUS Group [GENetically ImmUne–mediated enteropathieS] from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition [ESPGHAN],Corresponding author: Nadine Cerf-Bensussan, Laboratory of Intestinal Immunity, Institut IMAGINE-INSERM 1163, Université Paris Descartes-Sorbonne Paris Cité. 24, boulevard du Montparnasse. 75015 Paris, France. Tel: 33-[0]1-42-75-42-88;
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Abstract
INTRODUCTION The advent of affordable and rapid next-generation sequencing has been transformative for prenatal diagnosis. Sequencing of cell-free DNA in maternal plasma has enabled the development of not only a highly sensitive screening test for fetal aneuploidies, but now definitive noninvasive prenatal diagnosis for monogenic disorders at an early gestation. Sequencing of fetal exomes offers broad diagnostic capability for pregnancies with unexpected fetal anomalies, improving the yield and accuracy of diagnoses and allowing better counseling for parents. The challenge now is to translate these approaches into mainstream use in the clinic. Areas covered: Here, the authors review the current literature to describe the technologies available and how these have evolved. The opportunities and challenges at hand, including considerations for service delivery, counseling, and development of ethical guidelines, are discussed. Expert commentary: As technology continues to advance, future developments may be toward noninvasive fetal whole exome or whole genome sequencing and a universal method for noninvasive prenatal diagnosis without the need to sequence both parents or an affected proband. Expansion of cell-free fetal DNA analysis to include the transcriptome and the methylome is likely to yield clinical benefits for monitoring other pregnancy-related pathologies such as preeclampsia and intrauterine growth restriction.
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Affiliation(s)
- Rhiannon Mellis
- a Genetics and Genomic Medicine , Great Ormond Street NHS Foundation Trust , London , UK
| | - Natalie Chandler
- b North Thames NHS Regional Genetics Service , Great Ormond Street NHS Foundation Trust , London , UK
| | - Lyn S Chitty
- a Genetics and Genomic Medicine , Great Ormond Street NHS Foundation Trust , London , UK.,c Genetics and Genomic Medicine , UCL Great Ormond Street Institute of Child Health , London , UK
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Abstract
In the last few decades, the AIDS pandemic and the significant advances in the medical management of individuals with neoplastic and inflammatory conditions have resulted in a dramatic increase in the population of immunosuppressed patients with opportunistic, life-threatening fungal infections. The parallel development of clinically relevant mouse models of fungal disease and the discovery and characterization of several inborn errors of immune-related genes that underlie inherited human susceptibility to opportunistic mycoses have significantly expanded our understanding of the innate and adaptive immune mechanisms that protect against ubiquitous fungal exposures. This review synthesizes immunological knowledge derived from basic mouse studies and from human cohorts and provides an overview of mammalian antifungal host defenses that show promise for informing therapeutic and vaccination strategies for vulnerable patients.
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Affiliation(s)
- Michail S Lionakis
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892;
| | - Stuart M Levitz
- Department of Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01655;
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Ochakovski GA, Bartz-Schmidt KU, Fischer MD. Retinal Gene Therapy: Surgical Vector Delivery in the Translation to Clinical Trials. Front Neurosci 2017; 11:174. [PMID: 28420956 PMCID: PMC5376580 DOI: 10.3389/fnins.2017.00174] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/16/2017] [Indexed: 01/07/2023] Open
Abstract
An exceptionally high number of monogenic disorders lead to incurable blindness, making them targets for the development of gene-therapy. In order to successfully apply therapeutic vector systems in vivo, the heterogeneity of the disease phenotype needs to be considered. This necessitates tailored approaches such as subretinal or intravitreal injections with the aim to maximize transduction of target cell populations, while minimizing off-target effects and surgical complications. Strategic decisions on parameters of the application are crucial to obtain the best treatment outcomes and patient safety. While most of the current retinal gene therapy trials utilize a subretinal approach, a deeper understanding of the numerous factors and considerations in choosing one delivery approach over the other for various ocular pathologies could lead to an improved safety and treatment efficacy. In this review we survey different vector injection techniques and parameters applied in recent retinal (pre-)clinical trials. We explore the advantages and shortcomings of each delivery strategy in the setting of different underlying ocular pathologies and other relevant factors. We highlight the potential benefits for patient safety and efficacy in applying those considerations in the decision making process.
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Affiliation(s)
- G Alex Ochakovski
- Centre for Ophthalmology, University Eye Hospital, University Hospital TuebingenTuebingen, Germany
| | - K Ulrich Bartz-Schmidt
- Centre for Ophthalmology, University Eye Hospital, University Hospital TuebingenTuebingen, Germany
| | - M Dominik Fischer
- Centre for Ophthalmology, University Eye Hospital, University Hospital TuebingenTuebingen, Germany.,Nuffield Laboratory of Ophthalmology, Department of Clinical Neurosciences, University of OxfordOxford, UK
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Abstract
As with all fields of medicine, the first step toward medical management of genetic disorders is obtaining an accurate diagnosis, which often requires testing at the molecular level. Unfortunately, given the large number of genetic conditions without a specific intervention, only rarely does a genetic diagnosis alter patient management-which raises the question, what is the added value of obtaining a molecular diagnosis? Given the fast-paced advancement of genomic technologies, this is an important question to address in the context of genome-scale testing. Here, we address the value of establishing a diagnosis using genome-scale testing and highlight the benefits and drawbacks of such testing. We also review and compare recent major studies implementing genome-scale sequencing methods to identify a molecular diagnosis in cohorts manifesting a broad range of Mendelian monogenic disorders. Finally, we discuss potential future applications of genomic sequencing, such as screening for rare conditions.
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Affiliation(s)
- Natasha T Strande
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599; ,
| | - Jonathan S Berg
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599; ,
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38
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Abstract
Massively parallel DNA sequencing has revolutionized analyses of human genetic variation. From having been out of reach for individual research groups and even more so for clinical diagnostic laboratories until recently, it is now possible to analyse complete human genomes within reasonable time frames and at a reasonable cost using technologies that are becoming increasingly available. This represents a huge advance in our ability to provide correct diagnoses for patients with rare inherited disorders and their families. This paradigm shift is especially dramatic within the area of monogenic disorders. Not only can rapid and safe diagnostics of virtually all known single-gene defects now be established, but novel causes of disease in previously unsolved cases can also be identified, illuminating novel pathways important for normal physiology. This greatly increases the capability not only to improve management of rare disorders, but also to improve understanding of pathogenetic mechanisms relevant for common, complex diseases.
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Affiliation(s)
- H Stranneheim
- Department of Molecular Medicine and Surgery, Science for Life Laboratory, Center for Molecular Medicine, Karolinska Institutet and the Centre for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - A Wedell
- Department of Molecular Medicine and Surgery, Science for Life Laboratory, Center for Molecular Medicine, Karolinska Institutet and the Centre for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm, Sweden
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Bersano A, Zuffardi O, Pantoni L, Quaglini S, Ciccone R, Vetro A, Persico A, Denaro MF, Micieli G. Next generation sequencing for systematic assessment of genetics of small-vessel disease and lacunar stroke. J Stroke Cerebrovasc Dis 2015; 24:759-65. [PMID: 25727672 DOI: 10.1016/j.jstrokecerebrovasdis.2014.10.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 04/18/2014] [Revised: 09/13/2014] [Accepted: 10/31/2014] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The pathogenesis of cerebral small-vessel disease (SVD) is still incompletely understood, although evidence from family and twin studies supports the hypothesis that genetic factors may contribute to SVD pathogenesis. Identification of genetic susceptibility factors for SVD may improve our knowledge on SVD pathogenesis. SVE-LA (Small Vessel and Lacunar) project is a multicenter prospective Lombardia region study aimed at applying innovative genetic technologies and accurate patient phenotyping to discover the genetic basis of SVD. METHODS A continuous series of subjects (aged 15-80 years) with a clinically and radiologically defined lacunar stroke referring to the participating Lombardia region stroke centers and an adequate number of age- and sex-matched controls are being included into the study. For each patient, clinical, demographic, instrumental, and familial data are collected applying standardized forms. After informed consent, a DNA sample for genetic analysis from patients and controls has been collected. The next generation sequencing (NGS) technology was applied to systematically screen patients for the most important genetic factors both monogenic and polygenic associated with SVD. The study includes also a centralized quantitative and qualitative analysis of neuroimaging studies. RESULTS Between March 2011 and October 2013, 212 lacunar stroke patients and 78 controls have been collected. Mean age of cases was 65.8 ± 11.1 years and 67% were men. CONCLUSIONS This is the first study applying systematically NGS technology on a wide series of lacunar stroke patients. A translational approach combining a systematic genetic screening with a detailed phenotyping may facilitate the discovery of genetic basis and improve our knowledge in the pathogenesis of SVD.
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Affiliation(s)
- Anna Bersano
- Department of Emergency Neurology, IRCCS C. Mondino National Neurological Institute Foundation, Pavia, Italy; Cerebrovascular Unit, IRCCS Foundation Neurological Institute 'C.Besta', Milan, Italy.
| | - Orsetta Zuffardi
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Leonardo Pantoni
- Stroke Unit and Neurology, Azienda Ospedaliero Universitaria Careggi, Firenze, Italy
| | - Silvana Quaglini
- Bio-Medical Informatics Laboratory of the University of Pavia, Pavia, Italy
| | - Roberto Ciccone
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Annalisa Vetro
- Biotechnology Research Laboratory, Foundation IRCCS, Policlinico San Matteo, Pavia, Italy
| | - Alessandra Persico
- Stroke Unit, IRCCS C. Mondino National Neurological Institute Foundation, Pavia, Italy
| | - Maria Federica Denaro
- Stroke Unit, IRCCS C. Mondino National Neurological Institute Foundation, Pavia, Italy
| | - Giuseppe Micieli
- Cerebrovascular Unit, IRCCS Foundation Neurological Institute 'C.Besta', Milan, Italy
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Jorge P, Mota-Freitas MM, Santos R, Silva ML, Soares G, Fortuna AM. A 26-Year Experience in Chorionic Villus Sampling Prenatal Genetic Diagnosis. J Clin Med 2014; 3:838-48. [PMID: 26237480 PMCID: PMC4449647 DOI: 10.3390/jcm3030838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 06/20/2014] [Accepted: 06/23/2014] [Indexed: 12/04/2022] Open
Abstract
This report describes the trends of chorionic villus sampling (CVS) referred for prenatal genetic diagnosis in the past two and a half decades in a Portuguese Center. Our cohort of 491 CVS was mostly performed by the transcervical method at the 12th gestational week. Data collected within the framework of this study relate to the following: sampling method, referral reason versus abnormality and incidence of procedure-related pregnancy loss, that declined to about 0.5% over the last 15 years. The year 2000 represented a change in referral reasons for chorionic tissue collection, shifting from almost exclusively for cytogenetic testing to an increasing number of molecular tests for monogenic disorders. Herein, success rates as well as cytogenetic and/or molecular DNA results are presented. These latter include not only tests for several monogenic disorders, but also aneuploidy and maternal cell contamination screening. This retrospective analysis reiterates that CVS is a safe and reliable first trimester technique for prenatal diagnosis in high genetic risk pregnancies.
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Affiliation(s)
- Paula Jorge
- Center of Medical Genetics Doutor Jacinto Magalhães, Oporto Hospital Center, C.H.P., EPE, Praça Pedro Nunes, 88, 4099-028 Porto, Portugal.
- Unit for Multidisciplinary Research in Biomedicine, UMIB, ICBAS-UP, Rua Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal.
| | - Maria Manuela Mota-Freitas
- Center of Medical Genetics Doutor Jacinto Magalhães, Oporto Hospital Center, C.H.P., EPE, Praça Pedro Nunes, 88, 4099-028 Porto, Portugal.
- Unit for Multidisciplinary Research in Biomedicine, UMIB, ICBAS-UP, Rua Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal.
| | - Rosário Santos
- Center of Medical Genetics Doutor Jacinto Magalhães, Oporto Hospital Center, C.H.P., EPE, Praça Pedro Nunes, 88, 4099-028 Porto, Portugal.
- Unit for Multidisciplinary Research in Biomedicine, UMIB, ICBAS-UP, Rua Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal.
| | - Maria Luz Silva
- Center of Medical Genetics Doutor Jacinto Magalhães, Oporto Hospital Center, C.H.P., EPE, Praça Pedro Nunes, 88, 4099-028 Porto, Portugal.
| | - Gabriela Soares
- Center of Medical Genetics Doutor Jacinto Magalhães, Oporto Hospital Center, C.H.P., EPE, Praça Pedro Nunes, 88, 4099-028 Porto, Portugal.
| | - Ana Maria Fortuna
- Center of Medical Genetics Doutor Jacinto Magalhães, Oporto Hospital Center, C.H.P., EPE, Praça Pedro Nunes, 88, 4099-028 Porto, Portugal.
- Unit for Multidisciplinary Research in Biomedicine, UMIB, ICBAS-UP, Rua Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal.
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Benn P. Non-Invasive Prenatal Testing Using Cell Free DNA in Maternal Plasma: Recent Developments and Future Prospects. J Clin Med 2014; 3:537-65. [PMID: 26237390 PMCID: PMC4449688 DOI: 10.3390/jcm3020537] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/11/2014] [Accepted: 04/14/2014] [Indexed: 01/09/2023] Open
Abstract
Recent advances in molecular genetic technologies have facilitated non-invasive prenatal testing (NIPT) through the analysis of cell-free fetal DNA in maternal plasma. NIPT can be used to identify monogenic disorders including the identification of autosomal recessive disorders where the maternally inherited mutation needs to be identified in the presence of an excess of maternal DNA that contains the same mutation. In the future, simultaneous screening for multiple monogenic disorders is anticipated. Several NIPT methods have been developed to screen for trisomy. These have been shown to be effective for fetal trisomy 21, 18 and 13. Although the testing has been extended to sex chromosome aneuploidy, robust estimates of the efficacy are not yet available and maternal mosaicism for gain or loss of an X-chromosome needs to be considered. Using methods based on the analysis of single nucleotide polymorphisms, diandric triploidy can be identified. NIPT is being developed to identify a number of microdeletion syndromes including α-globin gene deletion. NIPT is a profoundly important development in prenatal care that is substantially advancing the individual patient and public health benefits achieved through conventional prenatal screening and diagnosis.
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Affiliation(s)
- Peter Benn
- Department of Genetics and Developmental Biology, Human Genetics Laboratory, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT 06030-3808, USA.
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Abstract
The first gene therapy clinical trials were initiated more than two decades ago. In the early days, gene therapy shared the fate of many experimental medicine approaches and was impeded by the occurrence of severe side effects in a few treated patients. The understanding of the molecular and cellular mechanisms leading to treatment- and/or vector-associated setbacks has resulted in the development of highly sophisticated gene transfer tools with improved safety and therapeutic efficacy. Employing these advanced tools, a series of Phase I/II trials were started in the past few years with excellent clinical results and no side effects reported so far. Moreover, highly efficient gene targeting strategies and site-directed gene editing technologies have been developed and applied clinically. With more than 1900 clinical trials to date, gene therapy has moved from a vision to clinical reality. This review focuses on the application of gene therapy for the correction of inherited diseases, the limitations and drawbacks encountered in some of the early clinical trials and the revival of gene therapy as a powerful treatment option for the correction of monogenic disorders.
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Affiliation(s)
| | - Hildegard Büning
- Department I of Internal Medicine and Center for Molecular Medicine Cologne (CMMC), University of CologneCologne, Germany
| | | | - Axel Schambach
- Institute of Experimental Hematology, Hannover Medical SchoolHannover, Germany
- Division of Hematology/Oncology, Children's Hospital Boston, Harvard Medical SchoolBoston, MA, USA
| | - Manuel Grez
- Institute for Biomedical ResearchGeorg-Speyer-Haus, Frankfurt, Germany
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Bersano A, Baron P, Lanfranconi S, Trobia N, Sterzi R, Motto C, Comi G, Sessa M, Martinelli-Boneschi F, Micieli G, Ferrarese C, Santoro P, Parati E, Boncoraglio G, Padovani A, Pezzini A, Candelise L. Lombardia GENS: a collaborative registry for monogenic diseases associated with stroke. Funct Neurol 2012; 27:107-117. [PMID: 23158583 PMCID: PMC3812776] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The Italian region of Lombardy, with its existing stroke centers and high-technology laboratories, provides a favorable context for studying monogenic diseases associated with stroke. The Lombardia GENS project was set up to create a regional network for the diagnosis of six monogenic diseases associated with stroke: CADASIL, Fabry disease, MELAS, familial and sporadic hemiplegic migraine, hereditary cerebral amyloid angiopathy and Marfan syndrome. The network comprises 36 stroke centers and seven high-technology laboratories, performing molecular analysis. In this context, all stroke/TIA patients fulfilling clinical criteria for monogenic diseases are currently being included in an ongoing study. Demographic, clinical and family data and diagnostic criteria are collected using standardized forms. On the basis of stroke incidence in Lombardy and the reported prevalence of the diseases considered, we expect, during the course of the study, to collect datasets and DNA samples from more than 200 stroke patients suspected of having monogenic diseases. This will allow evaluation of the regional burden and better phenotype characterization of monogenic diseases associated with stroke.
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Affiliation(s)
- Anna Bersano
- Maggiore Policlinico Hospital, IRCCS, University of Milan, Italy.
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