The present invention is based on the identification of novel biomarkers predictive of responsiveness to anti-immune checkpoint therapies.

The invention features methods of diagnosis by assessing B7-H1 expression in a tissue from a subject that has, or is suspected of having, cancer, methods of treatment with agents that interfere with B7-H1-receptor interaction, methods of selecting candidate subjects likely to benefit from cancer immunotherapy, and methods of inhibiting expression of B7-H1.

Provided herein are methods for determining the presence of cancer (malignant versus benign), monitoring the progression of cancer, monitoring cancer relapse, monitoring the response to cancer therapy, or cancer staging in a subject, by evaluating CD33.sup.+/HLA-DR.sup.low, CD14.sup.+/HLA-DR.sup.low, CD66b.sup.+/HLA-DR.sup.low or, CD11b.sup.+/HLA-DR.sup.low MDSC for activation of a transcription factor. Transcription factors include, but are not limited to, STAT3, pSTAT3, HIF1α, or C/EBPβ. The MDSC phenotype can be CD33.sup.+HLA-DR.sup.lowHIF1α.sup.+/STAT3.sup.+, CD14.sup.+HLA-DR.sup.lowHIF1α.sup.+/STAT3.sup.+/pSTAT3.sup.+/C/EBPb.sup.+, CD66b.sup.+HLA-DR.sup.lowHIF1α.sup.+/STAT3.sup.+/pSTAT3.sup.+/C/EBPb.sup.+, CD33.sup.+HLA-DR.sup.lowHIF1α.sup.+/STAT3.sup.+/pSTAT3.sup.+/C/EBPb.sup.+, CD11b.sup.+HLA-DR.sup.lowHIF1α.sup.+/STAT3.sup.+/pSTAT3.sup.+/C/EBPb.sup.+, or CD11b.sup.+HLA-DR.sup.lowC/EBPβ.sup.+. Also provided herein are methods for inducing human MDSC from healthy donor peripheral blood mononuclear cells (PBMC) by co-culturing PBMC with human solid tumor cell lines and subsequently measuring their suppressive ability.

In some aspects, the invention provides methods of identifying, detecting, and/or measuring protein-protein interactions. In some aspects, the invention provides methods of identifying and/or characterizing modulators of protein-protein interactions. In some aspects, the invention provides methods of identifying and/or characterizing modulators of protein activity, wherein the methods are based at least in part on measuring interaction between a chaperone and client protein. In some aspects, the invention provides methods for identifying and/or characterizing compounds and/or for assessing compound specificity, wherein the methods are based at least in part on measuring interaction between a chaperone and client protein. In some embodiments, a client protein is a kinase. In some embodiments, a compound is a kinase inhibitor. In some aspects, the invention provides methods of profiling kinase inhibitor specificity. In some aspects, the invention provides assay systems and/or reagents useful for performing one or more of the inventive methods. In some aspects, the invention provides newly identified targets of a variety of kinase inhibitors. In some aspect, the invention provides methods of inhibiting kinases identified herein as targets of certain kinase inhibitors. In some aspects, the invention provides methods of treating a disease, e.g., cancer, by inhibiting one or more kinase(s) newly identified as targets of certain kinase inhibitors.

The present disclosure relates to methods for generating blood protein profiles in red blood cell-enriched blood samples. The disclosed methods represent a new and improved laboratory technique for producing a protein profile from blood, increasing protein detection.

In various embodiments methods are provided for identifying and/or quantifying one or more antigens of interest (biomarkers) on the surface of cell- or tissue-specific exosomes. In an illustrative embodiments the methods comprise: i) incubating a population of exosomes with one or more tissue-specific antibodies that bind an antigen specific to a tissue or cell type of interest that produces exosomes, where the tissue specific antibodies are attached to acceptor bead or magnetic beads so the antibodies bind exosomes displaying the antigen; ii) obtaining a purified population of exosomes bound by the tissue specific antibodies with and/or without photocleavable linker based technology; iii) incubating a test subset of the isolated tissue-specific exosomes with acceptor beads attached to test antibodies that bind an antigen of interest thereby binding exosomes that display the antigen of interest and a control subset with negative control acceptor beads; v) incubating the test subset of isolated exosomes and the control subset of exosomes with a donor-bearing antibody that binds an exosome specific antigen; and vi) detecting a signal produced upon illumination of the control subset and/or the test; and vii) detecting the antigen(s) of interest.

The present application relates to anti-LOX and anti-LOXL2 antibodies and their use in purification, diagnostic and therapeutic methods. Antibodies include monoclonal antibodies, humanized antibodies and functional fragments thereof. Anti-LOX and anti-LXL2 antibodies can be used to identify and treat conditions such as a fibrotic condition, angiogenesis, or to prevent a transition from an epithelial cell state to a mesenchymal cell state.

This document relates to methods and materials for identifying and/or treating mammals having cancer (e.g., a SCD1-associated cancer). For example, methods and materials for using one or more stearoyl CoA desaturase 1 (SCD1) polypeptide inhibitors to treat a mammal having cancer (e.g., a SCD1-associated cancer) are provided.

The present invention relates to the prognosis of the outcome of a cancer in a patient, which prognosis is based on the quantification of one or several biological markers that are indicative of the presence of, or alternatively the level of, the adaptive immune response of said patient against said cancer.

The present invention relates to a set of polypeptides and its uses. In particular, the present invention relates to a set of polypeptides whereby this set comprises two polypeptides each of which comprises a targeting moiety “T” binding to an antigen “Λ” and a fragment of “F” of a functional domain, wherein said two polypeptides are not associated with each other in absence of a substrate that has “A” at (on) its surface and wherein, upon dimerization of “F”, the resulting dimer becomes functional. Furthermore, medical and diagnostic uses of said set are described. Moreover, the present invention relates to nucleic acid molecule(s) encoding said set of polypeptides. The present invention also relates to a vector comprising the nucleotide sequence of nucleic acid molecule(s) encoding said set of polypeptides. Furthermore, the present invention relates to pharmaceutical compositions comprising said set of polypeptides. Moreover, the present invention relates to a kit comprising said set of polypeptides.