Lausanne, Switzerland & Murcia, Spain, 30 July 2025 —
Saphetor, the creators of the industry-leading VarSome suite of NGS bioinformatics tools, announces a new partnership with LongSeq, a Spanish biotechnology company specialized in advanced long-read DNA sequencing. Through this collaboration, LongSeq becomes an official distributor of VarSome Clinical for long-read sequencing in Spain.
LongSeq has been working with Oxford Nanopore Technologies for years, applying long read sequencing to genetically complex clinical cases. This has resulted in HEREDITARY-CANCER-Seq, a comprehensive long-read sequencing test enabling superior resolution to detect complex structural variants, tandem repeats, mobile element insertions, and epigenetic modifications.
Recognizing the need for advanced variant interpretation to support HEREDITARY-CANCER-Seq, LongSeq selected VarSome Clinical as their solution for tertiary analysis. The platform will be integrated into the internal workflows of LongSeq and made available to their customers.
VarSome Clinical provides industry leading annotation and automated classification, combined with advanced tools to enable incisive analyses of NGS data for both short and long-read sequencing data across germline and somatic samples. This collaboration combines comprehensive long-read sequencing coverage with deep annotation and analysis tools, enabling faster and more robust diagnostic decision-making.
This collaboration represents a significant advancement for the genomics sector in Spain, enabling laboratories, hospitals, and research centers to access a solution that enhances the detection of complex genetic variants, particularly those that are difficult to interpret, such as structural and epigenetic variants. This translates into more accurate diagnoses, faster turnaround times, and ultimately better clinical decisions.
Belén de La Morena, CEO LongSeq commented:
"At LongSeq, our mission is to provide an integral long-read sequencing service that empowers researchers and clinicians to uncover key genetic insights that enable better diagnoses and more impactful research. However, the challenge of analyzing vast amounts of variants from sequencing data remains significant. By partnering with Saphetor, we are equipping our customers with an intuitive and powerful tool for variant filtering and prioritization including structural variants which are more challenging, helping them extract meaningful insights more quickly and with greater confidence, particularly when interpreting challenging structural variants.”
Maarten Kempen, CCO of Saphetor commented:
“The potential of long-read sequencing is enormous, and we are excited to see it gaining traction in Spain thanks to LongSeq. We are proud to share their commitment for innovation, quality, and improved patient outcomes. Through VarSome Clinical, we become part of their end-to-end workflow by providing evidence-based interpretation, especially for structural variants. We truly believe this collaboration can be an important step towards the broader adoption of long-read sequencing technologies across Spain, and eventually to the rest of Europe, bringing the industry closer to establishing long-read sequencing and analysis in clinical diagnostics.”