Alethia Biotherapeutics Inc.

Daiichi Sankyo Company, Limited

Matthew Stuible

Gilles Bernard Tremblay

Mario Filion

Traian Sulea

Anna N Moraitis

Novel antibodies and antigen binding fragments that specifically binds to Siglec-15 are described herein. In some embodiments, the antibodies or antigen binding fragments may block the biological activity of Siglec-15 and are useful in composition for the treatment of bone loss, more particularly in bone diseases that have increased cell surface expression of Siglec-15, such as conditions where there is an increase in the bone degradative activity of osteoclasts. The invention also relates to cells expressing the antibodies or antigen binding fragments such as monoclonal, humanized or chimeric antibodies. Additionally, methods of detecting and treating bone loss, bone-related diseases or cancer using the antibodies and fragments are also disclosed.

Siglec-15 antibodies in treating bone loss-related disease

Antibodies and antigen binding fragments that specifically binds to Siglec-15 are described herein. These antibodies or antigen binding fragments may have the ability of inhibiting differentiation of osteoclasts and/or the ability of inhibiting the bone resorption activity of osteoclasts. Compositions and cells expressing anti-Siglec-15 antibodies or antigen binding fragments are also disclosed herewith. Anti-Siglec-15 antibodies may also be useful for the treatment of bone loss, or bone diseases. Methods for the detection or diagnosis of bone loss or bone-related diseases are also described.

Anti-Siglec-15 antibodies

Novel antibodies and antigen binding fragments that specifically binds to Siglec-15 are described herein In some embodiments, the antibodies or antigen binding fragments may block the biological activity of Siglec-15 and are useful in composition for the treatment of bone loss, more particularly in bone diseases that have increased cell surface expression of Siglec-15, such as conditions where there is an increase in the bone degradative activity of osteoclasts The invention also relates to cells expressing the antibodies or antigen binding fragments such as monoclonal, humanized or chimeric antibodies Additionally, methods of detecting and treating bone loss, bone-related diseases or cancer using the antibodies and fragments are also disclosed.

Nucleic acids encoding anti-Siglec-15 antibodies

Novel antibodies and antigen binding fragments that specifically binds to S&#x3b9;glec-15 are described herein. In some embodiments, the antibodies or antigen binding fragments may block the biological activity of S&#x3b9;glec-15 and are useful in composition for the treatment of bone loss, more particularly in bone diseases that have increased cell surface expression of S&#x3b9;glec-15, such as conditions where there is an increase in the bone degradative activity of osteoclasts. The invention also relates to cells expressing the antibodies or antigen binding fragments such as monoclonal, humanized or chimeric antibodies. Additionally, methods of detecting and treating bone loss, bone-related diseases or cancer using the antibodies and fragments are also disclosed.

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Mont-Royal, Canada

Matthew Stuible