Remegen Co. Ltd. emerged as a surprise challenger in the generalized myasthenia gravis space, unveiling positive phase III data of its China-approved lupus drug, telitacicept (RCT-18; Tai’ai), in the rare autoimmune neuromuscular disorder at the 2025 American Academy of Neurology conference.

The sparsity of mid-to-late stage prospects in atopic dermatitis (AD, or eczema) – which has proved an especially challenging indication – plus some newsmaking fizzles in the space have caused developers to probe new targets with particular intensity. Most popular approaches thus far involve IL-4, IL-13, thymic stromal lymphopoietin and JAK. Developers have stumbled for varying reasons such as high placebo response rates, safety or lack of clinical proof of concept. Among the potential AD rescuers is Nektar Therapeutics Inc. with rezpegaldesleukin (rezpeg), which takes aim at IL-2.

When an autoimmune disease disrupted the life of someone close to scientist Dario Gutierrez, an idea emerged for a new company called Merida Biosciences focused on removing misdirected antibodies and their negative effects using Fc biotherapeutics.