AsianScientist (Jul. 27, 2026) – Decoding the human genome by inhabitants genetics has produced helpful insights into human well being and evolution. For many years, genotyping microarrays have been the go-to instruments in inhabitants genetics, enabling landmark research which have recognized hundreds of disease-linked variants. But, their limitations are more and more troublesome to disregard.
Array designs are primarily based on identified variants on the time of manufacture, and are usually skewed towards populations of European ancestry. This ascertainment bias is a major problem in inhabitants genetics, particularly when learning extra various or underrepresented populations. It is a matter that initiatives just like the Human Pangenome Reference Consortium are working to handle, by constructing a richer, multi-ancestry map that higher displays the total breadth of human genetic variety.
“Legacy microarrays essentially wrestle to find novel or uncommon variants. As a result of they have been primarily designed utilizing knowledge from populations of European ancestry, additionally they carry out poorly for Asian cohorts,” mentioned Emily M. Leproust, PhD, CEO and co-founder of Twist Bioscience.
A worldwide chief providing next-generation sequencing (NGS) services and products throughout the organic continuum, Twist Bioscience surpasses legacy array know-how with an ecosystem of instruments that ship workflows ideally suited for population-scale sequencing. Leveraging probe panel design experience and in-house enzyme engineering, Twist unleashes each scientifically superior and operationally possible sequencing at scale.
“Twist brings the facility of silicon-based DNA synthesis to NGS,” added Dr. Leproust. “We allow researchers to affordably sequence and construct strong, consultant genomic databases from the bottom up, somewhat than counting on shoehorned legacy instruments.”
Streamlining Library Preparation
Considered one of these instruments is the Twist FlexPrep™ UHT Library Preparation Equipment, which simplifies and optimizes ultra-high-throughput sequencing. Constructed on Normalization by Ligation™ (NBL) know-how powered by Twist’s excessive conversion effectivity ligase, the FlexPrep Equipment removes the necessity for particular person pattern quantification and focus adjustment previous to library preparation. In large-cohort research, the place DNA inputs can fluctuate significantly throughout samples, that single step historically consumes monumental time and sources. With NBL, the chemistry self-normalizes throughout a variety of genomic DNA inputs—from 30 to 300 nanograms—permitting researchers to skip upfront quantification completely and pool samples early within the workflow.
The effectivity positive aspects are substantial. Researchers can course of as much as 1,152 samples in a single 96-well plate sequencing run, whereas decreasing pricey pipette tip consumption by greater than 75 p.c—from over 17,000 to underneath 4,000 per plate. What beforehand required 12 deep-well plates of laborious plate administration now resolves to a few 384-well plates and a single 96-well plate by finish of day.
The FlexPrep Equipment’s real-world impression is greatest illustrated by the expertise of US-based genetic testing agency, Gene by Gene, offered at a webinar. Dealing with rising pattern volumes and the shrinking economics of microarrays, the corporate totally migrated its pattern quantity to an NGS-based workflow. After integrating the FlexPrep Equipment with its sequencing platform, Gene by Gene shut down round 40 incubators and eradicated the hybridization steps that had beforehand required two full working days. With the identical variety of personnel, the lab was in a position to double or triple its processing output. Not like fixed-probe arrays, the NGS-based workflow additionally allowed the group to tune sequencing depth by pattern, from 0.5x protection for simple ancestry functions to 4x for higher-confidence variant calls.
Genotyping at Scale
With library preparation streamlined, researchers face their subsequent alternative: what to sequence. For inhabitants genetics research requiring protection of lots of of hundreds of identified variants throughout huge cohorts, the Twist Genotyping Panel – Human 600k supplies a sequencing-based different to straightforward genotyping arrays.
Comprising 594,275 probes focusing on over 600,000 genomic websites, the Twist Human Genotyping Panel covers probably the most generally used variants in inhabitants screening research and genome-wide affiliation research (GWAS). Critically, it achieves this utilizing Twist Bioscience’s double-stranded DNA probe synthesis, which delivers the uniform protection and low off-target charges that distinguish NGS-based genotyping from array-based strategies. The panel can be simply customizable with a customized spike-in panel.
The NGS method captures context round probe targets, enabling discovery of novel adjoining variants somewhat than merely confirming what was already identified. When paired with the FlexPrep Equipment, NGS can overcome limitations associated to price per pattern and throughput.
“Researchers get deeper, extra dependable knowledge with fewer sequencing reads per pattern in comparison with each arrays and competing NGS panels,” mentioned Dr Leproust. “Biobanks, large-scale cohort researchers, and pharmacogenomics initiatives are discovering the Twist Genotyping Panel extremely helpful. Any neighborhood seeking to improve from legacy array to sequencing knowledge with out breaking their price range is adopting it.”
Moreover, for researchers targeted on multi-ancestry research, they will think about the Twist Variety SNP Panel. The panel has 600,000 probes protecting roughly 1.4 million single-nucleotide polymorphisms (SNPs) curated to function an ethnicity-neutral genotyping normal, and can be utilized standalone or spiked into current exome workflows.
Panels Tailor-made to Particular Wants
In inhabitants genetics, no two research ask the identical query. Whether or not it’s to construct consultant databases for particular ethnic teams or perform GWAS targeted on illness variants prevalent particularly communities, many research require content material tailor-made to their distinctive objectives—which Twist Bioscience can help by the customization of its catalog fastened panels.
With Twist Customized NGS Panels, researchers can design panels focusing on nearly any genomic area of curiosity. Twist Bioscience’s proprietary algorithms optimize probe sequences for uniform seize effectivity. The scalability and adaptability of the panels permit them to help probe dimension as small as 100 to over 1,000,000 probes per pool.
“A researcher can come to us with an idea or an inventory of targets, and we are able to iterate a design and manufacture a production-ready, extremely uniform customized panel in a matter of weeks—considerably quicker than conventional manufacturing strategies,” shared Dr. Leproust.
For researchers whose questions lengthen past genotyping into uncommon variant discovery, illness gene identification or research-grade exome findings, Twist Exome 2.0 completes the NGS ecosystem. The panel enriches the human exome, roughly 36.5 megabases protecting all main protein-coding areas, utilizing probes designed towards the newest genome assemblies and incorporating disease-causing variants from databases together with ClinVar, ACMG73, GenCode and RefSeq.
In comparative research performed by a third-party laboratory, Twist Exome 2.0 achieved fold-80 scores of 1.3 towards three competing panels—the uniform protection of any commercially obtainable exome enrichment product. It additionally covers 97 p.c of goal bases at 30x depth with solely 6 Gb of sequencing.
For population-scale exome packages the place per-sample sequencing prices are carefully managed, that effectivity interprets straight into bigger cohorts and quicker solutions. In a single occasion, Twist Bioscience designed a customized spike-in panel as an growth to Twist Exome 2.0 for the Human Pangenome Reference Consortium.
Complementing the sequencing ecosystem, Twist Bioscience collaborates with main informatics companions similar to SeqOne, an AI-powered NGS bioinformatics platform that gives end-to-end variant evaluation.
Towards a Actually Inclusive Genomics
Greater than half of the world’s inhabitants lives in Asia, but the continent stays underrepresented within the genomic databases that underpin drug growth, illness danger prediction and public well being coverage. Addressing that hole requires each the scientific rigor to generate high-quality knowledge and the operational scalability to generate it at a inhabitants stage.
“The period of compromising with legacy microarrays is over,” mentioned Dr. Leproust. “Twist Bioscience supplies the ultra-high-throughput, cost-effective and extremely uniform NGS instruments crucial to construct really consultant, multi-ethnic inhabitants genomics databases at a large scale.”
From library preparation to genotyping, Twist Bioscience affords a streamlined, extremely automated NGS workflow. For biobank initiatives and researchers dedicated to constructing a extra equitable genomic science, Twist Bioscience’s NGS ecosystem could also be precisely what the way forward for inhabitants genetics wants.
For Analysis Use Solely. Not to be used in diagnostic procedures.
Attain out to Twist Bioscience to study extra about its inhabitants genomics options right here.
—
Supply: Twist Bioscience, Shutterstock/Sudarsan Thobias
Disclaimer: This text doesn’t essentially replicate the views of AsianScientist or its workers.
