This invention provides fully human monoclonal antibodies that recognize HER2. The invention further provides methods of using such monoclonal antibodies in a variety of therapeutic, diagnostic, and prophylactic indications.

Disclosed herein is a novel chimeric antigen receptor and use thereof. The novel chimeric antigen receptor consists of a signal peptide, an antigen binding domain, a transmembrane region, and an intracellular signal domain, and comprises a 4-1BB signal peptide and/or a 4-1BB molecular transmembrane region. Nucleic acid sequences of various chimeric antigen receptors are separated and purified and provided is a chimeric antigen receptor and a CAR-T cell which are specific for a CD19 malignant tumor antigen. In the malignant tumor killing test of hematological cell lines, the ability of immune cells to target and recognize tumor cells is significantly enhanced, and the killing activity against tumor cells is also enhanced.

Disclosed herein is a novel chimeric antigen receptor and use thereof. The novel chimeric antigen receptor consists of a signal peptide, an antigen binding domain, a transmembrane region, and an intracellular signal domain, and comprises a 4-1BB signal peptide and/or a 4-1BB molecular transmembrane region. Nucleic acid sequences of various chimeric antigen receptors are separated and purified and provided is a chimeric antigen receptor and a CAR-T cell which are specific for a CD19 malignant tumor antigen. In the malignant tumor killing test of hematological cell lines, the ability of immune cells to target and recognize tumor cells is significantly enhanced, and the killing activity against tumor cells is also enhanced.

The present disclosure provides compositions and methods for the detection and treatment of cancer. Specifically, the compositions of the present technology include novel DOTA-haptens that may be complexed with a radioisotope (e.g., .sup.225Ac). Also disclosed herein are methods of the using the DOTA-haptens of the present technology in diagnostic imaging as well as pretargeted radioimmunotherapy.

The present disclosure provides compositions and methods for the detection and treatment of cancer. Specifically, the compositions of the present technology include novel DOTA-haptens that may be complexed with a radioisotope (e.g., .sup.225Ac). Also disclosed herein are methods of the using the DOTA-haptens of the present technology in diagnostic imaging as well as pretargeted radioimmunotherapy.

The present invention concerns a method for treating triple-negative breast cancer (TNBC) in an individual, and/or for inducing an immune response to HER2/neu in an individual with a triple-negative breast cancer expressing low levels of HER2/neu, the method comprising administering to the individual: (a) an effective amount of trastuzumab, or derivative thereof; and (b) an effective amount of nelipepimut-S, or variant thereof, optionally with an immunological adjuvant. Preferably, the method includes a preparatory or priming phase comprising a frequency and duration of trastuzumab or trastuzumab derivative administration sufficient to substantially increase the major histocompatibility complex (MHC)-mediated presentation of HER2 peptide fragments to the patient immune system. The invention also includes medicaments and kits for treating TNBC in an individual, and/or for inducing an immune response to HER2/neu in an individual with a TNBC expressing HER2/neu.

The present invention relates to the conjugates of Tubulysin derivatives (anologs) and cell-binding molecules using branched (side-chain) linkers, and the resulting conjugates have better pharmacokinetic properties, and thus can more accurately target and kill abnormal cells. The invention also relates to the conjugation methods of the Tubulysin derivatives (anologs) to cell-binding molecules, and methods for synthesizing the small molecules, and methods of using the conjugates for targeted therapy for cancers, infections and autoimmune diseases. The conjugates of Tubulysin derivatives with long branched linkers demonstrated increased half-life, minimal exposure to non-targeted cells, tissues or organs in system circulation, leading to reduced off-target toxicity.

Disclosed herein are methods of treating HNSCC that comprises administration of a HER3 blocker and an immune checkpoint modulator. In some embodiments, also disclosed herein is a method of modulating activity level of the PI3K/AKT/mTOR pathway in a HNSCC cell to modulate proliferation or sensitization of the cancer cell to a treatment therapy.

Disclosed herein are methods of treating HNSCC that comprises administration of a HER3 blocker and an immune checkpoint modulator. In some embodiments, also disclosed herein is a method of modulating activity level of the PI3K/AKT/mTOR pathway in a HNSCC cell to modulate proliferation or sensitization of the cancer cell to a treatment therapy.

Disclosed are a natural killer (NK) cell expressing an anti-cotinine chimeric antigen receptor (CAR) specifically binding to cotinine, and a cell therapeutic agent containing the NK cell. The CAR-expressing NK cell which specifically binds cotinine, can effectively move to tumor tissue, regardless of the kind of cancer, depending on the binding substance bound to cotinine. Therefore, the natural killer cell can be usefully employed as a gene therapy exhibiting a highly efficient anticancer effect.