Systems and methods for detection of analytes by production of electrochemical species are provided. Some embodiments of this invention relate generally to carbon biosensors for detecting an analyte in a biological sample. More specifically, this invention relates generally to immunoassays for detection of analytes utilizing electroactive compounds, and more particularly, relates to diagnostic assays based on signals from electroactive chemical undergoing redox cycling on electrosensor consisting of carbon, to detect analytes wherein a precomplex mixture is formed and a multi-step, or single-step, assay is performed, resulting in greater signal.

Provided herein are biomarkers and therapies for the treatment of autoimmune and/or inflammatory diseases, such as lupus, and methods of using BTK inhibitors. In particular, provided are biomarkers for patient selection and prognosis in lupus, as well as methods of therapeutic treatment, articles of manufacture and methods for making them, diagnostic kits, methods of detection and methods of advertising related thereto.

The present disclosure provides methods in which adherent cells are treated with small molecules, cultured, lysed, and then analyzed by mass spectrometry to measure the activities of endogenous enzymes. The implementation of this method relies on the use of surfaces that are nanopatterned with cell adhesion ligands to mediate cell attachment and a peptide that is a substrate for the desired enzyme activity in the lysate.

Methods of treating obesity include administering to a subject in need thereof an effective amount of a therapeutic agent capable of reversing an inhibition of a Na/K-ATPase in a small intestine of a subject, such as a basolateral membrane Na/K-ATPase. Administering the therapeutic agent can further decrease an amount of glucose transport and/or decrease an amount of salt absorption in the small intestine of the subject to thereby treat the obesity. Methods for screening for a compound useful for treating obesity include contacting a small intestine cell with an effective amount of a test compound, and detecting whether an activity level of a Na/K-ATPase in the small intestine cell is increased in the presence of the test compound. The test compound is then identified as a compound useful for the treatment of obesity if the activity level of the Na/K-ATPase is increased in the presence of the test compound.

A diagnostic method for the prediction of tumor prognosis including the likelihood of formation of metastases or of relapse or local recurrence in tumor related diseases in a mammal and the provision of a therapy recommendation for a patient the enzyme activity of key enzymes of the energy metabolism is determined in fresh tumor tissue or fresh tumor cell mass after 24 hours incubation in a cell culture medium. Incubation reduces nutrition, drug and biopsy/surgery effects on the energy metabolism of the tissue slices or the cell mass. The quotients of enzyme activity of anaerobic enzymes are put in ratio to the enzyme activity of aerobic enzymes or vice versa. Said ratio can be taken into account for prognosis of metastasis and a therapy recommendation.

Provided herein are methods and kits for analyzing a biological sample obtained from a subject having, suspected of having, or being at risk for a disease associated with the contact activation system.

The present invention provides a method for diagnosing or determining the risk of developing Alzheimer's disease and for treating Alzheimer's disease with S-equol. An aspect of the present invention includes the use of a direct mitochondrial target engagement biomarker to diagnose or assess the risk of developing Alzheimer's disease. Another aspect of the present invention includes the use of a pharmaceutically effective amount of S-equol to treat or prevent Alzheimer's disease in a subject diagnosed with or determined to be at risk of developing Alzheimer's disease.

Disclosed are two methods of treating or preventing a proliferative disease as characterized and/or diagnosed by at least one selected from an accumulation of branched-chain amino acid(s) (BCAA), suppression of activity or transcripts level of BCAA catabolic enzyme(s) and a decrease in acylcarnitine level (C5:1), one comprising the administration of a BCAA catabolism enhancer and/or branched chain alpha-ketoacid dehydrogenase complex (BCKDC) kinase inhibitor and the other comprising administration of a meal replacement with low BCAA levels. In three separate embodiments, methods of diagnosis or prognosis are disclosed, each comprising the measurement of the levels of a different marker, i.e. BCAA, BCAA catabolic enzymes or acylcarnitine (C5:1). In preferred embodiments, the proliferative disease is cancer. Also disclosed is a kit or microarray chip useful for methods thereof.

The invention relates to nucleic acid-based sensors and their use in determining enzyme activity, disease detection, and monitoring the effectiveness of enzyme inhibitors.

A glucose sensor comprises a conducting back electrode. The glucose sensor also comprises a silicon substrate in electrical contact with the conducting back electrode. The glucose sensor also comprises a dielectric layer disposed on the silicon substrate. The glucose sensor also comprises a pH sensing layer disposed on the dielectric layer. The glucose sensor also comprises a chemical layer disposed on the pH sensing layer, wherein the chemical layer is in contact with an aqueous solution. The glucose sensor also comprises a conductive electrode disposed on the dielectric layer, where in the conductive electrode is in contact with the aqueous solution.