Taci fusion protein and use thereof

By developing the TACI fusion protein, which combines BAFF and APRIL with MASP3 or MASP2, multi-target regulation of the complement system and B cell activation pathways is achieved, solving the problem of limited efficacy in treating autoimmune diseases in existing technologies and realizing more comprehensive disease control.

WO2026124436A1 Publication Date: 2026-06-18STAIDSON (BEIJING) BIOPHARMACEUTICALS CO LTD +1

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
STAIDSON (BEIJING) BIOPHARMACEUTICALS CO LTD
Filing Date
2025-12-09
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing technologies for treating autoimmune diseases typically target only a single target or signaling pathway, resulting in limited therapeutic effects and an inability to comprehensively regulate the activation of multiple related signaling pathways.

Method used

Develop a TACI fusion protein containing the extracellular domain of TACI or a variant thereof, capable of binding BAFF and APRIL, and specifically binding the antigen-binding domain of MASP3 or MASP2, to achieve multi-target regulation by inhibiting the complement system and B cell activation pathways.

🎯Benefits of technology

It effectively inhibits complement activation and excessive B cell activation, reduces the production of autoantibodies, lowers the symptoms and inflammatory response of autoimmune diseases, and provides a more comprehensive therapeutic effect.

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Abstract

The present invention relates to the field of biomedicine, and in particular to an antibody that specifically recognizes MASP3 and a use thereof. The antibody has high affinity for human MASP3 and inhibitory activity against an alternative pathway. In addition, the present invention further relates to a multi-specific antibody specifically binding to MASP3 and MASP2, and a pharmaceutical composition comprising an antibody specifically binding to MASP3 and an antibody specifically binding to MASP2 and / or the multi-specific antibody. The antibody or the composition is used for preparing a drug for treating autoimmune diseases, transplant-related diseases, inflammatory diseases, hematologic diseases, coagulation diseases, angiogenesis-dependent diseases and / or viral infectious diseases.
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