GSK Bolsters siRNA Portfolio with SiranBio Deal

By: Editorial Team

May 6, 2026


  • Licensor: GSK
  • Partner: SiranBio (China)
  • Deal value: $40M upfront + up to $960M milestones
  • Focus area: Metabolic/kidney disease siRNAs
  • Next steps: Phase 1/IND handoff to GSK

What happened?

GSK signed a licensing agreement with Chinese biotech SiranBio for two siRNA candidates targeting metabolic diseases, particularly inflammation-driven kidney disorders. GSK pays $40 million upfront and up to $960 million in milestones plus royalties for global rights.

Why does it matter?

SiRNA enables precise gene silencing for undruggable targets; GSK’s deal expands immunology pipeline with first-in-class oligos for kidney disease, aligning with respiratory/inflammation focus. Builds on GSK’s siRNA investments amid modality’s growth.

Who’s behind it?

SiranBio advances one to Phase 1 in China, IND-enabling for second; GSK takes global development post-handoff. Kaivan Khavandi (GSK R&I head) highlighted platform synergy.

How was it achieved?

SiranBio completes early studies; GSK handles global clinical/regulatory/commercial. Complements GSK’s Empirico COPD siRNA and Wave ASO deals.

What’s next?

GSK advances post-Phase 1/IND; potential first-in-class kidney therapies. SiranBio gains royalties, validation.

What are people saying?

Kaivan Khavandi, GSK: “Potential first-in-class… significant opportunity in multiple kidney diseases.”

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