Touting a science-driven, regenerative medicine-based treatment for hair loss “designed for the 21st century,” Pelage Pharmaceuticals Inc. drew a solid group of investors to the table in an oversubscribed $120 million series B round to fund an upcoming phase III program for PP-405, a topical small molecule targeting hair follicle stem cells.

An uncommon route to the public markets – direct listing – paid off for Turn Therapeutics Inc., with shares (NASDAQ:TTRX) closing Oct. 9 at $9.20, up $2.20, or 31%, having risen as high as $26.50 in its second day of trading. The firm is advancing late-stage clinical programs in eczema and onychomycosis. Also in the works are global health initiatives in thermostable vaccine delivery designed to serve underserved areas.

Arcus Biosciences Inc. has announced five new research programs for autoimmune and inflammatory diseases, and is targeting initiation of the first clinical studies next year.

Recent evidence in atopic dermatitis (AD) points to the involvement of additional pro-inflammatory pathways besides core Th2 responses. Current therapeutic approaches that work target mostly the IL-4/IL-13 pathway, but the duration of response and depth could be improved.

Vitiligo is caused by autoreactive CD8+ T cells that react against skin melanocytes, where IL-15 has been shown to activate these T cells. Innovent Biologics (Suzhou) Co. Ltd. recently presented data on their monoclonal antibody (mAb) – IBI-3013 – that targets IL-15. IBI-3013 was evaluated in vitro in immune cell expansion and CD8 T-cell activation assays, as well as in vivo in a skin inflammation model and in a graft-vs.-host disease (GVHD) model.

Interleukin-1 receptor-associated kinase 4 (IRAK-4) is a modulator of IL-1 receptor and Toll-like receptor (TLR) signaling and has emerged as a promising therapeutic target for several inflammatory diseases. Gilead Sciences Inc. and Nurix Therapeutics Inc. recently presented data generated in a preclinical murine model of AD with their IRAK-4 degrader GS-6791.

The Human Cell Atlas project has delivered a fresh tranche of data mapping fibroblasts in healthy and diseased skin and pointing to drug targets with potential in multiple diseases across a range of tissues. Using single cell sequencing and spatial genomics, a technique for showing how gene expression varies at different locations within a tissue, nine different subpopulations of fibroblasts were identified, six in healthy skin and three in disease samples.

Resvita Bio Inc. has held a pre-IND meeting with the FDA for RVB-003, its lead investigational therapy for Netherton syndrome. The FDA’s feedback gives the company a pathway to submit an IND for RVB-003 in the first half of next year, with a clinical efficacy read-out anticipated by early 2027.