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Ligand Leads $75 Million Royalty Financing in Castle Creek Biosciences

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Ligand Pharmaceuticals
Ligand Pharmaceuticals

Capital will fund Castle Creek’s D-Fi Phase 3 clinical trial for patients with dystrophic epidermolysis bullosa through topline data results

Ligand invested $50 million and a syndicate of co-investors invested $25 million in return for a high-single digit royalty on D-Fi

JUPITER, Fla., Feb. 25, 2025 (GLOBE NEWSWIRE) -- Ligand Pharmaceuticals Incorporated (Nasdaq: LGND) today announced it has closed a royalty financing agreement with Castle Creek Biosciences, Inc. to support the Phase 3 clinical study of D-Fi (FCX-007), Castle Creek’s lead candidate, in patients with dystrophic epidermolysis bullosa (DEB).

Ligand originated, structured, and invested $50 million and led a syndicate of co-investors who invested $25 million in exchange for a high-single digit royalty on worldwide sales of D-Fi. The syndicate includes existing Castle Creek investors Paragon Biosciences and Valor Equity Partners and new investor XOMA Royalty Corporation (Nasdaq: XOMA).

“Partnering with Castle Creek is an exciting opportunity to advance an orphan drug-designated gene therapy for a serious unmet medical need through Phase 3 development,” said Todd Davis, CEO of Ligand. “This collaboration reflects our commitment to invest in groundbreaking de-risked treatments that can transform patients' lives and expand our diversified portfolio of revenue-generating assets.”

“We are pleased Ligand and our syndicate of investors recognized the potential of this critical therapy, which we believe represents a significant step forward in addressing the needs of patients living with DEB,” commented Matthew Gantz, president and CEO of Castle Creek. “Having a sophisticated investor like Ligand work closely with our extremely supportive equity partners made this transaction to support our Phase 3 clinical trial possible.”

D-Fi is an injectable autologous gene-modified cell therapy candidate for the treatment of DEB, a devastating, progressive, painful, and debilitating rare genetic skin disorder. DEB is caused by a mutation in the COL7A1 gene, leading to a deficiency of normal type VII collagen (COL7) protein, impairing the connection between the epidermis and the dermis. D-Fi is comprised of a patient’s own dermal fibroblasts, which are genetically modified completely ex vivo with a self-inactivating (SIN) lentiviral vector (LV) containing the COL7A1 gene to express COL7. D-Fi is locally administered by intradermal injection into chronic wounds where the COL7 protein can support the formation of anchoring fibrils in the skin. In clinical studies, D-Fi has been generally well tolerated, with injection site reactions (skin discoloration, erythema, hemorrhage, pain, and swelling) being the primarily reported adverse drug reactions. D-Fi was granted Orphan Drug Designation for the treatment of DEB and granted Rare Pediatric Disease, Fast Track, and Regenerative Medicine Advanced Therapy designations for the treatment of recessive dystrophic epidermolysis bullosa (RDEB) by the FDA.