Abstract: Disclosed herein is generally directed to antibodies against the Siglec-3, and pharmaceutical compositions that comprise the antibodies. According to some embodiments of the present disclosure, the present anti-Siglec-3 antibodies may suppress the over activation of Siglec-3, thereby reversing the immunosuppression effects resulted therefrom. As such, the present antibodies may treat diseases associated with the over activation of Siglec-3, such as hepatitis B virus (HBV) infection, neurodegenerative diseases, autoimmune diseases, or cancers. Accordingly, the present disclosure also includes methods for the treatment and/or prophylaxis of the above diseases.

Abstract: Provided herein is a method for treating neurodegenerative diseases, such as Alzheimer's disease (AD), by use of monoclonal antibody, which exhibits a binding affinity to Siglec-3 receptor. According to some embodiments of the present disclosure, the monoclonal antibody is capable of enhancing phagocytosis of neurotoxic peptides by immune cells thereby providing a neuroprotective effect to a subject in need thereof.

Abstract: Disclosed herein is a CLEC2 fusion protein comprising a first polypeptide and a second polypeptide coupled to the upstream of the first polypeptide. According to embodiments of the present disclosure, the first and the second polypeptides respectively comprise the amino acid sequences of SEQ ID NOs: 1 and 2. Also disclosed therein are uses of the CLEC2 fusion protein in treating severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and treating influenza virus infection.

Abstract: Provided herein is a method for treating neurodegenerative diseases, such as Alzheimer's disease (AD), by use of monoclonal antibody, which exhibits a binding affinity to Siglec-3 receptor. According to some embodiments of the present disclosure, the monoclonal antibody is capable of enhancing phagocytosis of neurotoxic peptides by immune cells thereby providing a neuroprotective effect to a subject in need thereof.