• Financing led by leading life sciences venture capital firm Forbion, with participation from existing investors SV Health Investors’ Dementia Discovery Fund (DDF) and Novartis Venture Fund (NVF)
  • Lead programme targeting MutSβ set to enter the clinic in 2026, offering a potentially disease-modifying therapy for Huntington’s disease
  • Forbion General Partner Rogier Rooswinkel joins Board of Directors

Cambridge, UK, 2 October 2024 – LoQus23 Therapeutics Ltd (“LoQus23”), a private biotechnology company investigating small molecule drugs that could stop DNA instability and slow neurodegeneration in Huntington’s Disease, myotonic dystrophy type 1 and similar triplet repeat expansion diseases, today announces the successful close of its £35 million (c.$43 million) Series A financing. The financing round was led by Forbion, alongside existing investors SV Health Investors’ Dementia Discovery Fund (DDF) and Novartis Venture Fund (NVF). Forbion General Partner Rogier Rooswinkel will join LoQus23’s Board of Directors.

LoQus23 was founded in 2019 by Entrepreneurs in Residence at DDF Dr David Reynolds, Dr Caroline Benn, and Dr Ruth McKernan CBE, FMedSci and seeded by SV’s Dementia Discovery Fund. It received additional seed funding from NVF in 2021. The Company has since established a platform of assays and a small molecule series of MutSα and MutSβ inhibitors which are therapeutically relevant in up to 30 triplet repeat diseases, including Huntington’s Disease.

The Mismatch Repair (MMR) branches of the DNA Damage Repair (DDR) system repair DNA insertions, deletions and misincorporation errors during transcription and/or cellular replication, with two main pathways dependent upon the size of mismatch – MutSα for small mismatches and MutSβ for larger insertion / deletion loops.

Huntington’s disease is an autosomal dominant neurodegenerative disorder for which there is currently no disease modifying treatment available and which has 30,000 patients in the US alone. By targeting somatic expansion, LoQus23 is hoping to slow or even halt the onset and progression of Huntington’s disease, a concept supported by genetic studies and recently strengthened by pre-clinical models.

The proceeds of the Series A financing will be primarily used to support the pre-clinical development and initial clinical studies of LoQus23’s lead programme, an allosteric small molecule MutSβ inhibitor. The Company is preparing its lead programme to enter the clinic in 2026.

Dr David Reynolds, Chief Executive Officer of LoQus23 Therapeutics, said: “This financing will enable us to develop key clinical data to support the development of our exciting lead programme. The ever-increasing body of data pointing to somatic expansion, caused by aberrant DNA mismatch repair, as being the primary culprit in Huntington’s disease provides great support that our approach of developing oral small molecule therapies will be transformative for patients with this dreadful inherited disease. We welcome Forbion as the lead investor of this round, alongside our existing high calibre investors, and look forward to benefiting from their support and expertise.”

Rogier Rooswinkel, General Partner at Forbion and newly appointed Board Member of LoQus23, commented: “Somatic expansion is a key driver of triplet repeat diseases like Huntington’s. In somatic expansion, MutSβ seems the most promising and best validated target, with the potential to bring disease progression to a halt. LoQus23 is leading the charge in developing allosteric small molecules against MutSβ, and we look forward to working with them to progress their molecules towards the clinic and ultimately to benefit patients.”

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