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Barboza LA, Ghisi NC. Evaluating the current state of the art of Huntington disease research: a scientometric analysis. ACTA ACUST UNITED AC 2018; 51:e6299. [PMID: 29340519 PMCID: PMC5769753 DOI: 10.1590/1414-431x20176299] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 09/29/2017] [Indexed: 11/22/2022]
Abstract
Huntington disease (HD) is an incurable neurodegenerative disorder caused by a dominant mutation on the 4th chromosome. We aim to present a scientometric analysis of the extant scientific undertakings devoted to better understanding HD. Therefore, a quantitative study was performed to examine the current state-of-the-art approaches that foster researchers’ understandings of the current knowledge, research trends, and research gaps regarding this disorder. We performed literature searches of articles that were published up to September 2016 in the “ISI Web of Science™” (http://apps.webofknowledge.com/). The keyword used was “Huntington disease”. Of the initial 14,036 articles that were obtained, 7732 were eligible for inclusion in the study according to their relevance. Data were classified according to language, country of publication, year, and area of concentration. The country leader regarding the number of studies published on HD is the United States, accounting for nearly 30% of all publications, followed by England and Germany, who have published 10 and 7% of all publications, respectively. Regarding the language in which the articles were written, 98% of publications were in English. The first publication to be found on HD was published in 1974. A surge of publications on HD can be seen from 1996 onward. In relation to the various knowledge areas that emerged, most publications were in the fields of neuroscience and neurology, likely because HD is a neurodegenerative disorder. Publications written in areas such as psychiatry, genetics, and molecular biology also predominated.
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Affiliation(s)
- L A Barboza
- Laboratório de Biologia Molecular, Universidade Tecnológica Federal do Paraná, Dois Vizinhos, PR, Brasil
| | - N C Ghisi
- Laboratório de Biologia Molecular, Universidade Tecnológica Federal do Paraná, Dois Vizinhos, PR, Brasil
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Chen HF, Chang SP, Wu SH, Lin WH, Lee YC, Ni YH, Chen CA, Ma GC, Ginsberg NA, You EM, Tsai FP, Chen M. Validating a rapid, real-time, PCR-based direct mutation detection assay for preimplantation genetic diagnosis. Gene 2014; 548:299-305. [PMID: 25034658 DOI: 10.1016/j.gene.2014.07.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 07/08/2014] [Accepted: 07/12/2014] [Indexed: 01/24/2023]
Abstract
Although co-amplification of polymorphic microsatellite markers is the current gold standard for preimplantation genetic diagnosis (PGD) of single-gene disorders (SGD), this approach can be hampered by the lack of availability of informative markers. We recently (2011) devised a novel in-house assay for PGD of aromatic L-amino acid decarboxylase deficiency, based on an amplification refractory mutation system and quantitative PCR (ARMS-qPCR). The objective of the present study was to verify ARMS-qPCR in a cohort of 20 PGD cycles with a diverse group of SGDs (15 couples at risk for 10 SGDs). Day-3 cleavage-stage embryos were subjected to biopsy and genotyping, followed by fresh embryo transfer (FET). The diagnostic rate was 82.9%; unaffected live births were achieved in 9 of 20 FET cycles (45%), with only one false negative (among 54 transferred embryos). Overall, the ARMS-qPCR had frequent allele-dropout (ADO), rendering it inappropriate as the sole diagnostic method (despite a favorable live-birth rate). Regardless, it has the potential to complement the current gold-standard methodology, especially when trophectoderm biopsy becomes a preferred option and genotyping needs to be timely enough to enable FET.
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Affiliation(s)
- Hsin-Fu Chen
- Department of Obstetrics and Gynecology, College of Medicine, and Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shun-Ping Chang
- Department of Genomic Medicine, Changhua Christian Hospital, Changhua, Taiwan; Department of Life Science, National Chung-Hsing University, Taichung, Taiwan
| | - Sheng-Hai Wu
- Department of Life Science, National Chung-Hsing University, Taichung, Taiwan
| | - Wen-Hsiang Lin
- Department of Genomic Medicine, Changhua Christian Hospital, Changhua, Taiwan
| | - Yi-Chung Lee
- Department of Neurology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yen-Hsuan Ni
- Department of Medical Genetics, National Taiwan University Hospital, Taipei, Taiwan
| | - Chi-An Chen
- Department of Obstetrics and Gynecology, College of Medicine, and Hospital, National Taiwan University, Taipei, Taiwan
| | - Gwo-Chin Ma
- Department of Genomic Medicine, Changhua Christian Hospital, Changhua, Taiwan; Institute of Biochemistry and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Norman A Ginsberg
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - En-Min You
- Department of Genomic Medicine, Changhua Christian Hospital, Changhua, Taiwan
| | | | - Ming Chen
- Department of Obstetrics and Gynecology, College of Medicine, and Hospital, National Taiwan University, Taipei, Taiwan; Department of Genomic Medicine, Changhua Christian Hospital, Changhua, Taiwan; Department of Life Science, National Chung-Hsing University, Taichung, Taiwan; Department of Medical Genetics, National Taiwan University Hospital, Taipei, Taiwan; Department of Life Science, Tunghai University, Taichung, Taiwan.
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Tan EC, Lai PS. Molecular diagnosis of neurogenetic disorders involving trinucleotide repeat expansions. Expert Rev Mol Diagn 2014; 5:101-9. [PMID: 15723596 DOI: 10.1586/14737159.5.1.101] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
There are more than 15 known neurogenetic disorders involving trinucleotide repeat expansion. Expanded repeats range from small expansions of 20-100 copies to larger expansions of up to several thousand units. These dynamic expansions result in variability in age of onset, degree of severity and clinical presentation. Individuals carrying alleles in the intermediate range, known as premutation alleles, are often asymptomatic, but can potentially transmit a further expanded allele to his/her offspring. For autosomal dominant adult-onset disorders, carriers are asymptomatic prior to disease onset. With current molecular tools, it is now possible to determine the presence and number of expanded repeats for accurate diagnosis, presymptomatic testing and carrier status screening. This review examines some of the current approaches for molecular diagnosis and discusses the issues unique to triplet repeat diseases.
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Affiliation(s)
- Ene-Choo Tan
- DSO National Laboratories, Population Genetics Programme, Defence Medical and Environmental Research Institute, 27 Medical Drive, 117510 Singapore.
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