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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
Published on: January 16, 2019
Identifying novel disease genes and revealing the pathomechanism of monogenic diseases
1Department of Human Genetics, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan.
Abstract:
Diseases are caused by genetic and/or environmental factors. It is important to understand the pathomechanism of monogenic diseases that are caused only by genetic factors, especially prenatal- or childhood-onset diseases for pediatricians. Identifying "novel" disease genes and elucidating how genomic changes lead to human phenotypes would develop new therapeutic approaches for rare diseases for which no fundamental cure has yet been established. Genomic analysis has evolved along with the development of analytical techniques, from Sanger sequencing (first-generation sequencing) to techniques such as comparative genomic hybridization, massive parallel short-read sequencing (using a next-generation sequencer or second-generation sequencer) and long-read sequencing (using a next-next generation sequencer or third-generation sequencer). I have been researching human genetics using conventional and new technologies, together with my mentors and numerous collaborators, and have identified genes responsible for more than 60 diseases. Here, an overview of genomic analyses of monogenic diseases that aims to identify novel disease genes, and several examples using different approaches depending on the disease characteristics are presented.
Insights
Researchers identified novel disease genes for over 60 monogenic diseases using advanced genomic analysis techniques. This research advances understanding of genetic disorders and aids in developing new therapies for rare conditions.
Area of Science:
- Human Genetics
- Genomics
- Molecular Biology
Background:
- Monogenic diseases stem solely from genetic factors, necessitating understanding of their pathomechanisms, particularly for early-onset conditions.
- Identifying novel disease genes and understanding genotype-phenotype correlations are crucial for developing novel therapeutics for rare diseases.
- Genomic analysis technologies have significantly advanced from Sanger sequencing to next-generation sequencing (NGS) and third-generation sequencing (TGS).
Purpose of the Study:
- To provide an overview of genomic analyses for identifying novel disease genes in monogenic disorders.
- To present examples of different genomic approaches tailored to specific disease characteristics.
- To highlight the importance of genetic research in advancing rare disease therapeutics.
Main Methods:
- Utilized conventional and advanced genomic analysis technologies, including Sanger sequencing, comparative genomic hybridization, next-generation sequencing (short-read), and third-generation sequencing (long-read).
- Applied diverse analytical techniques based on individual disease characteristics to identify causative genes.
- Collaborated with mentors and researchers to analyze genomic data from patients with various monogenic diseases.
Main Results:
- Successfully identified genes responsible for over 60 monogenic diseases.
- Demonstrated the utility of various genomic approaches in pinpointing novel disease genes.
- Elucidated the link between genomic alterations and human phenotypes in multiple cases.
Conclusions:
- Genomic analysis is a powerful tool for discovering novel disease genes in monogenic disorders.
- Advancements in sequencing technologies have accelerated the identification of genetic causes for rare diseases.
- This research contributes to the development of new therapeutic strategies for currently incurable rare genetic conditions.
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