scholarly journals A Review of Bioinformatics Model and Computational Software of Next Generation Sequencing

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jalilah Arijah Mohd Kamarudin ◽  
Afnizanfaizal Abdullah ◽  
Roselina Sallehuddin
Keyword(s):  
Next Generation Sequencing ◽  
Review Paper ◽  
Bioinformatics Analysis ◽  
Variant Calling ◽  
Next Generation ◽  
The Past ◽  
Source Type ◽  
Next Generation Sequencing Ngs ◽  
Future Work ◽  
Generation Sequencing

In the past decade it has become increasingly the effort for researcher to surpass the bioinformatics challenges foremost in next generation sequencing (NGS). This review paper gives an overview of the computational software and bioinformatics model that has been used for next generation sequencing. In this paper, the description on functionalities, source type and website of the program or software are provided. These computational software and bioinformatics model are differentiating into three types of bioinformatics analysis stages including alignment, variant calling and filtering and annotation. Besides, we discuss the future work and the development for new bioinformatics tool to be advanced.

scholarly journals Improved next-generation sequencing pre-capture library yields and sequencing parameters using on-bead PCR

BioTechniques ◽  
2020 ◽  
Vol 68 (1) ◽  
pp. 48-51 ◽  
Author(s):  
Christopher R McEvoy ◽  
Timothy Semple ◽  
Bhargavi Yellapu ◽  
David Y Choong ◽  
Huiling Xu ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Variant Calling ◽  
Limiting Factor ◽  
Next Generation ◽  
Tumor Biopsy ◽  
Formalin Fixed Paraffin ◽  
Formalin Fixed Paraffin Embedded ◽  
Next Generation Sequencing Ngs ◽  
Tumor Dna ◽  
Generation Sequencing

Tumor DNA sequencing results can have important clinical implications. However, its use is often limited by low DNA input, owing to small tumor biopsy size. To help overcome this limitation we have developed a simple improvement to a commonly used next-generation sequencing (NGS) capture-based library preparation method using formalin-fixed paraffin-embedded-derived tumor DNA. By using on-bead PCR for pre-capture library generation we show that library yields are dramatically increased, resulting in decreased sample failure rates. Improved yields allowed for a reduction in PCR cycles, which translated into improved sequencing parameters without affecting variant calling. This methodology should be applicable to any NGS system in which input DNA is a limiting factor.

scholarly journals A customized scaffolds approach for the detection and phasing of complex variants by next-generation sequencing

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Qiandong Zeng ◽  
Natalia T. Leach ◽  
Zhaoqing Zhou ◽  
Hui Zhu ◽  
Jean A. Smith ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Variant Calling ◽  
Causative Mutation ◽  
Next Generation ◽  
Single Nucleotide ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Next Generation Sequencing Ngs ◽  
Reference Bias ◽  
Generation Sequencing

Abstract Next-generation sequencing (NGS) is widely used in genetic testing for the highly sensitive detection of single nucleotide changes and small insertions or deletions. However, detection and phasing of structural variants, especially in repetitive or homologous regions, can be problematic due to uneven read coverage or genome reference bias, resulting in false calls. To circumvent this challenge, a computational approach utilizing customized scaffolds as supplementary reference sequences for read alignment was developed, and its effectiveness demonstrated with two CBS gene variants: NM_000071.2:c.833T>C and NM_000071.2:c.[833T>C; 844_845ins68]. Variant c.833T>C is a known causative mutation for homocystinuria, but is not pathogenic when in cis with the insertion, c.844_845ins68, because of alternative splicing. Using simulated reads, the custom scaffolds method resolved all possible combinations with 100% accuracy and, based on > 60,000 clinical specimens, exceeded the performance of current approaches that only align reads to GRCh37/hg19 for the detection of c.833T>C alone or in cis with c.844_845ins68. Furthermore, analysis of two 1000 Genomes Project trios revealed that the c.[833T>C; 844_845ins68] complex variant had previously been undetected in these datasets, likely due to the alignment method used. This approach can be configured for existing workflows to detect other challenging and potentially underrepresented variants, thereby augmenting accurate variant calling in clinical NGS testing.

scholarly journals Precision Medicine and Precision Public Health in the Era of Pathogen Next-Generation Sequencing

2019 ◽  
Vol 221 (Supplement_3) ◽  
pp. S289-S291 ◽  
Author(s):  
Mariana Leguia ◽  
Anton Vila-Sanjurjo ◽  
Patrick S G Chain ◽  
Irina Maljkovic Berry ◽  
Richard G Jarman ◽  
...  
Keyword(s):  
Public Health ◽  
Next Generation Sequencing ◽  
Infectious Diseases ◽  
Next Generation ◽  
The Past ◽  
Infectious Disease Research ◽  
History Of ◽  
Next Generation Sequencing Ngs ◽  
Generation Sequencing ◽  
Health Applications

Abstract This brief report serves as an introduction to a supplement of the Journal of Infectious Diseases entitled “Next-Generation Sequencing (NGS) Technologies to Advance Global Infectious Disease Research.” We briefly discuss the history of NGS technologies and describe how the techniques developed during the past 40 years have impacted our understanding of infectious diseases. Our focus is on the application of NGS in the context of pathogen genomics. Beyond obvious clinical and public health applications, we also discuss the challenges that still remain within this rapidly evolving field.

scholarly journals Guidelines for diagnostic next-generation sequencing

2015 ◽  
Vol 24 (1) ◽  
pp. 2-5 ◽  
Author(s):  
Gert Matthijs ◽  
Erika Souche ◽  
Mariëlle Alders ◽  
Anniek Corveleyn ◽  
Sebastian Eck ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Diagnostic Tests ◽  
Human Genetics ◽  
Genetic Disorders ◽  
Next Generation ◽  
The Past ◽  
Supplementary Material ◽  
New Feature ◽  
Next Generation Sequencing Ngs ◽  
Generation Sequencing

Abstract We present, on behalf of EuroGentest and the European Society of Human Genetics, guidelines for the evaluation and validation of next-generation sequencing (NGS) applications for the diagnosis of genetic disorders. The work was performed by a group of laboratory geneticists and bioinformaticians, and discussed with clinical geneticists, industry and patients’ representatives, and other stakeholders in the field of human genetics. The statements that were written during the elaboration of the guidelines are presented here. The background document and full guidelines are available as supplementary material. They include many examples to assist the laboratories in the implementation of NGS and accreditation of this service. The work and ideas presented by others in guidelines that have emerged elsewhere in the course of the past few years were also considered and are acknowledged in the full text. Interestingly, a few new insights that have not been cited before have emerged during the preparation of the guidelines. The most important new feature is the presentation of a ‘rating system’ for NGS-based diagnostic tests. The guidelines and statements have been applauded by the genetic diagnostic community, and thus seem to be valuable for the harmonization and quality assurance of NGS diagnostics in Europe.

scholarly journals Novel mutations identified in Chinese families with autosomal dominant congenital cataracts by targeted next-generation sequencing

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Shan Li ◽  
Jianfei Zhang ◽  
Yixuan Cao ◽  
Yi You ◽  
Xiuli Zhao
Keyword(s):  
Next Generation Sequencing ◽  
Congenital Cataract ◽  
Bioinformatics Analysis ◽  
Next Generation ◽  
Novel Mutations ◽  
Congenital Cataracts ◽  
Chinese Families ◽  
Targeted Next Generation Sequencing ◽  
Next Generation Sequencing Ngs ◽  
Generation Sequencing

Abstract Background Congenital cataract is a clinically and genetically heterogeneous visual impairment. The aim of this study was to identify causative mutations in five unrelated Chinese families diagnosed with congenital cataracts. Methods Detailed family history and clinical data were collected, and ophthalmological examinations were performed using slit-lamp photography. Genomic DNA was extracted from peripheral blood of all available members. Thirty-eight genes associated with cataract were captured and sequenced in 5 typical nonsyndromic congenital cataract probands by targeted next-generation sequencing (NGS), and the results were confirmed by Sanger sequencing. Bioinformatics analysis was performed to predict the functional effect of mutant genes. Results Results from the DNA sequencing revealed five potential causative mutations: c.154 T > C(p.F52 L) in GJA8 of Family 1, c.1152_1153insG(p.S385Efs*83) in GJA3 of Family 2, c.1804 G > C(p.G602R) in BFSP1 of Family 3, c.1532C > T(p.T511 M) in EPHA2 of Family 4 and c.356G > A(p.R119H) in HSF4 of Family 5. These mutations co-segregated with all affected individuals in the families and were not found in unaffected family members nor in 50 controls. Bioinformatics analysis from several prediction tools supported the possible pathogenicity of these mutations. Conclusions In this study, we identified five novel mutations (c.154 T > C in GJA8, c.1152_1153insG in GJA3, c.1804G > C in BFSP1, c.1532C > T in EPHA2, c.356G > A in HSF4) in five Chinese families with hereditary cataracts, respectively. NGS can be used as an effective tool for molecular diagnosis of genetically heterogeneous disorders such as congenital cataract, and the results can provide more effective clinical diagnosis and genetic counseling for the five families.

scholarly journals One byte at a time: evidencing the quality of clinical service next-generation sequencing for germline and somatic variants

2019 ◽  
Vol 28 (2) ◽  
pp. 202-212 ◽  
Author(s):  
Maria Weronika Gutowska-Ding ◽  
Zandra C. Deans ◽  
Christophe Roos ◽  
Jukka Matilainen ◽  
Farrah Khawaja ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Variant Calling ◽  
Molecular Techniques ◽  
Performance Criteria ◽  
Next Generation ◽  
Gene Target ◽  
Clinical Diagnostic ◽  
And Performance ◽  
Next Generation Sequencing Ngs ◽  
Generation Sequencing

Abstract Next-generation sequencing (NGS) is replacing other molecular techniques to become the de facto gene diagnostics approach, transforming the speed of diagnosis for patients and expanding opportunities for precision medicine. Consequently, for accredited laboratories as well as those seeking accreditation, both objective measures of quality and external review of laboratory processes are required. External quality assessment (EQA), or Proficiency Testing (PT), can assess a laboratory’s service through an independent external agency, the EQA provider. The analysis of a growing number of genes and whole exome and genomes is now routine; therefore, an EQA must be delivered to enable all testing laboratories to participate. In this paper, we describe the development of a unique platform and gene target independent EQA scheme for NGS, designed to scale from current to future requirements of clinical diagnostic laboratories testing for germline and somatic variants. The EQA results from three annual rounds indicate that clinical diagnostic laboratories are providing an increasingly high-quality NGS service and variant calling abilities are improving. From an EQA provider perspective, challenges remain regarding delivery and performance criteria, as well as in analysing similar NGS approaches between cohorts with meaningful metrics, sample sourcing and data formats.

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