$175M financing will support development of in vivo CAR-T therapies

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Biotechnology company Capstan Therapeutics has raised $175 million in an oversubscribed Series B financing.

The proceeds will be used to advance CPTX2309, Capstan’s lead in vivo chimeric antigen receptor T cell (CAR-T) candidate, to early clinical proof-of-concept in autoimmune disorders, and to further develop Capstan’s tLNP pipeline.

CPTX2309 delivers an mRNA payload encoding for an anti-CD19 CAR to CD8-expressing T cells, effectively engineering CAR-T cells in vivo.

The therapeutic goal of this approach is to achieve a reset of the immune system through rapid deep B cell depletion in both blood and lymphoid tissues, without the challenges of conventional ex vivo CAR-T.

“This Series B financing brings together an exceptional syndicate of investors that recognise the potential of Capstan’s in vivo CAR-T technology,” said Laura Shawver, President and Chief Executive Officer of Capstan. “We are grateful for the support of both new and existing investors as we enter a critical phase of execution, with the ultimate goal of bringing new therapeutic modalities to patients.”

The financing was led by RA Capital Management, with participation from new investors Forbion, Johnson & Johnson Innovation – JJDC, Mubadala Capital, Perceptive Advisors, and Sofinnova Investments. Capstan’s existing investors also participated in the round.

“We are proud to support Capstan and their mission to lead in vivo CAR-T,” said Nandita Shangari, Managing Director at RA Capital Management. “Our conviction in Capstan is a result of the confluence of a differentiated platform technology that enables efficient T cell engineering, the platform’s ideal application in a large autoimmune market being disrupted by ex vivo CAR-T therapy, and a seasoned management team that is working tirelessly to advance this technology into patients.”

Diana Spencer, Senior Digital Content Editor, DDW

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