Abstract: The disclosure relates to methods and compositions for the treatment of Systemic Lupus Erythematosus (SLE). Specifically, the disclosure relates to methods comprising administering to a subject a type I IFN receptor inhibitor.

Abstract: Disclosed are methods for treating cancer (e.g., solid tumor cancers, lung cancer, bladder head and neck cancer) with an anti-PD-L1 antibody in a patient identified as being responsive to anti-PD-L1 antibody therapy by detecting a mutation in one or more disclosed circulating tumor DNA (ctDNA) markers. Also disclosed are methods for determining the efficacy of anti-PD-L1 therapeutic antibody treatment in a patient having lung cancer or bladder cancer comprising detecting variant allele frequency in ctDNA in plasma samples and determining the difference of the variant allele frequency in ctDNA between the first and at least second plasma samples, wherein a decrease in the variant allele frequency in the at least second plasma sample relative to the first plasma sample identifies the anti-PD-L1 antibody treatment as effective.

Abstract: The disclosure provides methods for treating lung cancer (e.g., non-small cell lung cancer) with an anti-PD-L1 antibody in a patient identified using a polynucleotide or polypeptide marker of the disclosure: CXCL9, KRT8, TRIM29, and/or IFNgamma.

Abstract: The invention relates to a rapid, sensitive method to obtain a gene expression profile from a target cell population in a blood sample. The target cells can be circulating tumor cells. Disclosed are methods and kits for obtaining such profiles.