
Cambridge, Mass., October 19, 2023 – In a pioneering move, Flagship Pioneering announces the fusion of Laronde and Senda Biosciences, birthing Sail Biomedicines—a trailblazing force in the evolution of fully programmable medicines poised to redefine patient care. Dr. Guillaume Pfefer, Ph.D., and MBA, the current CEO-Partner at Flagship Pioneering, will spearhead Sail as its CEO and board member, with Dr. John Mendlein, Executive Partner at Flagship Pioneering, assuming the role of Executive Chairman.
Sail Biomedicines leverages over eight years of collaborative data and platform development from Laronde and Senda Biosciences. Senda’s platform, utilizing a universal chemical code within natural nanoparticles, allows precise deployment of payloads, like translatable RNA, to designated cells.
Simultaneously, Laronde’s groundbreaking Endless RNA (eRNA), a synthetic RNA class, presents substantial therapeutic potential.
Dr. Mendlein underscores the potential of Endless RNA to inaugurate a new era of programmable medicines, deliverable to cells and tissues through unique deployment molecules. He envisions leveraging proprietary generative AI technologies and rapid prototyping as pivotal for achieving breakthroughs beyond current human comprehension.
Dr. Pfefer highlights Sail’s deployment platform, utilizing natural nanoparticles to transport biomolecules into human cells with unique tropism, potency, and redosability. His vision is to expedite the development of new product candidates, form strategic partnerships, and unlock diverse value pools for the swift delivery of transformative vaccines and therapies.
Noubar Afeyan, Ph.D., Founder and CEO of Flagship Pioneering, expresses confidence in Sail Biomedicines, stating, “I am confident the combined leadership team and board will carry forward this company to realize its bold ambitions and ultimately deliver maximum impact for patients.”
The Sail Biomedicines Board of Directors, including Drs. Mendlein and Pfeffer, comprises individuals from the Laronde and Senda Biosciences boards, alongside experts from Incyte, ADC Therapeutics, Massachusetts Institute of Technology, and Flagship Pioneering.
About Sail Biomedicines
Sail Biomedicines pioneers the integrative design and deployment of fully programmable medicines, combining programmable circular RNA technology (Endless RNA™ or eRNA) with an industry-leading platform of programmable nanoparticles.
About Flagship Pioneering
Flagship Pioneering is a biotechnology company inventing and building platform companies, each harboring the potential for transformative products in human health or sustainability. Since 2000, Flagship has shepherded over 100 ventures, resulting in over $90 billion in aggregate value, with a current ecosystem comprising 43 companies.

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PackGene is a CRO & CDMO technology company that specializes in packaging recombinant adeno-associated virus (rAAV) vectors. Since its establishment in 2014, PackGene has been a leader in the AAV vector CRO service field, providing tens of thousands of custom batches of AAV samples to customers in over 20 countries. PackGene offers a one-stop CMC solution for the early development, pre-clinical development, clinical trials, and drug approval of rAAV vector drugs for cell and gene therapy (CGT) companies that is fast, cost-effective, high-quality, and scalable. Additionally, the company provides compliant services for the GMP-scale production of AAVs and plasmids for pharmaceutical companies, utilizing five technology platforms, including the π-Alpha 293 cell AAV high-yield platform and the π-Omega plasmid high-yield platform. PackGene's mission is to make gene therapy affordable and accelerate the launch of innovative gene drugs. The company aims to simplify the challenging aspects of gene therapy development and industrialization processes and provide stable, efficient, and economical rAAV Fast Services to accelerate gene and cell therapy development efforts from discovery phase to commercialization.
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