Abstract: Methods for treating non-alcoholic steatohepatitis and/or hepatocellular carcinoma include administering a polypeptide antagonist of a Na/K ATPase/Src receptor complex to a subject in need thereof. Methods and assays for diagnosis or prognosis of non-alcoholic steatohepatitis and/or hepatocellular carcinoma in a subject are also provided and include the steps of providing a biological sample from the subject, determining an expression level or activity in the sample of at least one biomarker selected from Caveolin-1, Survivin, and SMAC; and comparing the expression level or activity of the at least one biomarker in the sample, if present, to a control expression level or activity of the at least one biomarker. Prophylaxis or treatment of the non-alcoholic steatohepatitis and/or hepatocellular carcinoma in a subject can then be initiated based on the expression level or activity of Caveolin-1, Survivin, and SMAC in the sample.

Abstract: Methods for diagnosis or prognosis of a cancer in a subject are provided and include the steps of: obtaining a biological sample from a subject; determining an amount of a phosphorylation at a Y260 residue in a Na/K ATPase present in the biological sample; and comparing the amount of the phosphorylation in the sample to a control level to thereby diagnose the cancer. Methods for detecting a metabolic switch from oxidative phosphorylation to aerobic glycolysis are also provided in which a biological sample including one or more cells is obtained and an amount of a phosphorylation at a Y260 residue in a Na/K ATPase is determined in the one or more cells.

Abstract: Na/K-ATPase ligands are provided that comprise a compound of formula (I) and are capable of binding to the ?1 Na/K-ATPase and decreasing the endocytosis of ?1 Na/K-ATPase, such that expression of the ?1 Na/K-ATPase is restored in the plasma membrane of cells and tumor growth and invasion is reduced. Pharmaceutical compositions are further provided that include a compound of formula (I) and a pharmaceutically-acceptable vehicle, carrier, or excipient. Methods of treating a cancer are further included and comprise administering to a subject an effective amount of a Na/K-ATPase ligand.

Abstract: Methods for treating non-alcoholic steatohepatitis and/or hepatocellular carcinoma include administering a polypeptide antagonist of a Na/K ATPase/Src receptor complex to a subject in need thereof. Methods and assays for diagnosis or prognosis of non-alcoholic steatohepatitis and/or hepatocellular carcinoma in a subject are also provided and include the steps of providing a biological sample from the subject, determining an expression level or activity in the sample of at least one biomarker selected from Caveolin-1, Survivin, and SMAC; and comparing the expression level or activity of the at least one biomarker in the sample, if present, to a control expression level or activity of the at least one biomarker. Prophylaxis or treatment of the non-alcoholic steatohepatitis and/or hepatocellular carcinoma in a subject can then be initiated based on the expression level or activity of Caveolin-1, Survivin, and SMAC in the sample.

Abstract: Non-naturally occurring peptides are provided that act as a Src SH2 domain antagonist of cardiotonic steroids. Pharmaceutical compositions comprising the peptides are also provided along with vectors encoding the peptides. Methods of treating a Src-associated disease and reducing Src activity in a cell are further provided and include administering or contacting a cell with an effective amount of the peptide.

Abstract: Methods for diagnosis or prognosis of a cancer in a subject are provided and include the steps of: obtaining a biological sample from a subject; determining an amount of a phosphorylation at a Y260 residue in a Na/K ATPase present in the biological sample; and comparing the amount of the phosphorylation in the sample to a control level to thereby diagnose the cancer. Methods for detecting a metabolic switch from oxidative phosphorylation to aerobic glycolysis are also provided in which a biological sample including one or more cells is obtained and an amount of a phosphorylation at a Y260 residue in a Na/K ATPase is determined in the one or more cells.

Abstract: Non-naturally occurring peptides are provided that act as a Src SH2 domain antagonist of cardiotonic steroids. Pharmaceutical compositions comprising the peptides are also provided along with vectors encoding the peptides. Methods of treating a Src-associated disease and reducing Src activity in a cell are further provided and include administering or contacting a cell with an effective amount of the peptide.