This invention discloses a neutralizing
nucleic acid aptamer that targets and inhibits B-
cell activating factors and its application in the treatment of
systemic lupus erythematosus (SLE). The neutralizing
nucleic acid aptamer described in this invention can efficiently inhibit the binding of BAFF to specific receptors on the B-
cell membrane, including the BAFF
receptor (BAFF-R), human calmotropic
cyclin ligand-interacting molecule (TACI), and B-
cell maturation
antigen (BCMA), thereby reducing the proportion of
plasma cells, plasmablasts, and
germinal center B cells, ultimately reducing the production and
secretion of autoantibodies, thus exhibiting a targeted
therapeutic effect on SLE. Compared with existing BAFF-neutralizing biological agents, the neutralizing
nucleic acid aptamer of this invention has advantages such as high specificity, high affinity, ease of synthesis, low
immunogenicity, low cost, and designability and programmability, making it a potential novel nucleic acid agent for targeted SLE therapy with excellent prospects for clinical translational applications.