Provided herein are compositions, systems, and methods for detecting and treating IL-17 and/or IL-13 related conditions, such as asthma, autoimmune diseases, and cancer. In some embodiments, methods, compositions, and systems are provided for detecting elevated protein or RNA levels of IL-17 (and/or IL-13) and a second marker selected from: SAA, LCN2, and YKL-40, and treating the subject with an IL-17 (or IL-13) inhibitor or IL-17 (or IL-13) receptor inhibitor. In other embodiments, methods, compositions, and systems are provided for detecting a biomarker in a sample from a subject that has been treated with an IL-17 (or IL-13) inhibitor or IL-17 (or IL-13) receptor inhibitor, where the biomarker is SAA, LCN2, or YKL-40, and where at least one action is performed, such as identifying elevated levels of the biomarker in the biological sample and treating the subject with an IL-17 (or IL-13) inhibitor and/or IL-17 (or IL-13) receptor inhibitor.

The present invention is related to novel methods for categorizing and treating a population of subjects that are at risk for increased pulmonary exacerbation and disease progression.

The present invention relates to methods, kits, and compositions for: i) detecting the level of 3-bromotyrosine in a sample that has been treated to liberate 3-bromotyrosine from 4-O-glucuronide-3-bromotyrosine, and/or ii) detecting the level of 4-O-glucuronide-3-bromotyrosine, and/or the combined level of both 4-O-glucuronide-3-bromotyrosine and 3-bromotyrosine, in a sample that has not been treated to liberate 3-bromotyrosine from 4-O-glucuronide-3-bromotyrosine. In certain embodiments, such detected levels are used to: i) identify the presence, severity, or risk of an eosinophilic disorder (e.g., asthma or a TH2-high eosinophilic disorder); ii) identify therapy effective for treating asthma or an eosinophilic disorder; or iii) identify patients suitable for treatment with therapeutic agents targeted to asthma or an eosinophilic disorder.

The present invention is directed toward novel methods to identify as well as to treat a subject having an inflammatory disease resistant to corticosteroids.

Provided are methods of analysing markers of eosinophil levels and/or markers of neutrophil levels in a blood sample from a patient suffering from an exacerbation of inflammation of a respiratory condition to determine the levels of eosinophils and/or neutrophils respectively. The methods may involve selecting an appropriate treatment. Systems and kits for performing the analysis are also provided.

In some aspects, the invention provides methods of treating a subject in need of treatment for a chronic complement-mediated disorder. In some aspects, the invention provides methods of treating a subject in need of treatment for a Th17-associated disorder. In some aspects, the invention provides methods of treating a subject in need of treatment for a chronic respiratory system disorder. In some aspects, the invention provides methods of administering a complement inhibitor to a subject. In some embodiments, a method of treating a subject comprises administering multiple doses of a complement inhibitor to the subject according to a dosing schedule that leverages the prolonged effect of complement inhibition in chronic respiratory disorders. In some embodiments, a subject has chronic obstructive pulmonary disease. In some embodiments, a subject has asthma.

Provided herein are therapeutic methods for the treatment of exacerbations of inflammatory respiratory diseases, including chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF), and asthma. In particular, the invention provides methods for patient selection, diagnosis, and treatment. Also provided herein are methods for preparing and analyzing lysophosphatidic acid (LPA) samples.

Molecules for inhibiting arachidonate 15-lipoxygenase (ALOX-15) gene products including dsRNA (dsRNA) agents such as small interfering RNAs (siRNAs), antisense oligonucleotides, and small molecule inhibitors for therapeutic use. Additionally provided are methods to inhibit the expression of a target gene by administering these agents for the treatment of diseases involving ALOX-15 gene products.

Methods of diagnosing and treating disorders related to TH2 inhibition, including but not limited to asthma, are provided. Also provided are methods of selecting or identifying patients for treatment with certain therapeutic agents that are TH2 pathway inhibitors.

Methods of diagnosing infections are disclosed. In one embodiment, the method comprises measuring the amount of each of the polypeptides TRAIL, CRP, IP10 and at least one additional polypeptide selected from the group consisting of IL-6 and PCT.