Silexion Therapeutics Reports Breakthroughs From SIL-204 Preclinical Studies

GRAND CAYMAN, Cayman Island--Silexion Therapeutics Corp. (NASDAQ: SLXN) (“Silexion” or the “Company”), a clinical-stage biotech developing RNA interference (RNAi) therapies for KRAS-driven cancers, today announced new preclinical findings for SIL-204, its second-generation siRNA candidate, following the optimization of its extended-release formulation. These latest findings demonstrate that the latest SIL-204-microparticle formulation can inhibit the growth and induce necrosis of the human pancreatic cell line that bears the KRAS G12D mutation xenotransplanted into mice. Given that this mutation constitutes the largest segment of pancreatic cancer subtypes, it represents a significant in the development of SIL-204.

“The improvements in cellular uptake and the enhanced extended-release formulation further strengthen our confidence in SIL-204's potential. We look forward to commencing our next set of studies in preparation for our Phase 2/3 clinical trial.”

Key new pre-clinical findings include:

Silexion plans to initiate toxicology studies with SIL-204 within the upcoming months and has plans to advance SIL-204 into Phase 2/3 clinical trials in the first half of 2026, focusing initially on locally advanced pancreatic cancer (LAPC) which has a notoriously high mortality rate. In parallel, the company plans to initiate preclinical studies for SIL-204, in colorectal cancer models.

"These optimizations represent a significant step forward in our development of SIL-204," said Ilan Hadar, Chairman and CEO of Silexion. "The improvements in cellular uptake and the enhanced extended-release formulation further strengthen our confidence in SIL-204's potential. We look forward to commencing our next set of studies in preparation for our Phase 2/3 clinical trial."

About Silexion Therapeutics

Silexion Therapeutics (NASDAQ: SLXN) is a pioneering clinical-stage, oncology-focused biotechnology company developing innovative RNA interference (RNAi) therapies to treat solid tumors driven by KRAS mutations, the most common oncogenic driver in human cancers. The company's first-generation product, LODER™, has shown promising results in a Phase 2 trial for non-resectable pancreatic cancer. Silexion is also advancing its next-generation siRNA candidate, SIL-204, designed to target a broader range of KRAS mutations and showing significant potential in preclinical studies. The company remains committed to pushing the boundaries of therapeutic innovation in oncology, with a focus on improving outcomes for patients with difficult-to-treat cancers. For more information please visit: https://silexion.com

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