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Next Generation Sequencing: The Future of Genomics

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History and Evolution of NGS Technologies

Next generation sequencing (NGS) technologies have revolutionized genomic research since their introduction in 2005. The first NGS platforms such as Roche 454 pyrosequencing and Illumina Solexa sequencing allowed massively parallel sequencing of DNA molecules and provided a means to sequence entire genomes for the first time. These early Next Generation Sequencing platforms enabled sequencing outputs that were several orders of magnitude higher than previous Sanger sequencing but produced relatively short read lengths.

Over the past decade, NGS technologies have continued to rapidly evolve and improve. Read lengths have increased from 25-50 bases initially to 250-300 bases on current instruments. Sequencing throughput has increased exponentially as well, allowing an entire human genome to be sequenced in just a few days. Newer third generation sequencing platforms such as PacBio SMRT and Oxford Nanopore sequencing can now produce read lengths spanning entire genes and chromosomes. These long read technologies are key for sequencing complex regions and assembling genomes accurately.

Applications of Next Generation Sequencing in Biomedical Research

The widespread adoption of NGS has revolutionized biomedical research. Some of the major applications of NGS include whole genome sequencing, transcriptome profiling,ChIP-seq, epigenomics,metagenomics and cancer genomics. Genome-wide association studies using NGS have identified thousands of novel genetic variants associated with human diseases. Cancer genomic studies have revealed the mutational landscape of major cancer types and driven the development of personalized therapies.

NGS-based transcriptome profiling techniques such as RNA-seq have provided deep insights into gene expression regulation, alternative splicing and non-coding RNAs. ChIP-seq experiments have mapped histone modifications, transcription factor binding sites and 3D genome organization on a massive scale. Metagenomics using NGS has allowed comprehensive profiling of microbial communities in various ecosystems including the human microbiome.

 

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