Abstract: A TIGIT antibody, an antigen-binding fragment thereof, and a medical use thereof. The present invention relates to a murine antibody, a chimeric antibody, and a humanized antibody comprising a CDR region of the TIGIT antibody, and a pharmaceutical composition comprising the TIGIT antibody and the antigen-binding fragment thereof, and a use thereof as a medicament. In particular, the present invention also relates to a use of a humanized TIGIT antibody for preparing a medicament for the treatment of TIGIT-associated diseases or conditions.

Abstract: A TIM-3 antibody, an antigen-binding fragment thereof, and medical uses thereof are described. More specifically, the present invention provides a rat-derived antibody containing a CDR region of the TIM-3 antibody, a chimeric antibody or a human-derived antibody thereof, and a pharmaceutical composition containing the TIM-3 antibody and the antigen-binding fragment thereof, as well as uses thereof serving as a drug. In particular, the present invention provides uses of a human-derived TIM-3 antibody in the preparation of drugs for treating TIM-3 -related conditions.

Abstract: Provided are a LAG-3 antibody, an antigen-binding fragment thereof, and a pharmaceutical application thereof. Further, provided are a chimeric antibody comprising a CDR of the LAG-3 antibody, a humanized antibody, a pharmaceutical composition comprising the LAG-3 antibody and the antigen-binding fragment thereof, and an application of the pharmaceutical composition as an antineoplastic drug. Particularly, provided is an application of a humanized LAG-3 antibody in preparation of drugs for treatment of diseases involving immune cells.