The disclosed invention relates to methods of modifying peptide compositions to increase stability and delivery efficiency. Specifically, the disclosed invention relates to methods to increase the stability and delivery efficiency of protein kinase C (PKC) modulatory peptide compositions. A therapeutic peptide composition comprises a carrier peptide and a cargo peptide. A carrier peptide is a peptide or amino acid sequence within a peptide that facilitates the cellular uptake of the therapeutic peptide composition. The cargo peptide is a PKC modulatory peptide. Peptide modifications to either the carrier peptide, the cargo peptide, or both, which are described herein increase the stability and delivery efficiency of therapeutic peptide compositions by reducing disulfide bond exchange, physical stability, reducing proteolytic degradation, and increasing efficiency of cellular uptake.

The present invention relates to peptides for the treatment or prevention of nonalcoholic fatty liver disease (NAFLD), non-alcoholic fatty liver (NAFL), non-alcoholic steatohepatitis (NASH), hepatic steatosis (fatty liver), liver fibrosis, liver inflammation, cirrhosis, or hepatocellular carcinoma.

The present invention relates to methods of activate an isoform of protein kinase C (PKC) for the treatment of neurological diseases including Alzheimer's disease and stroke using cyclopropanated or epoxidized derivatives of mono- and polyunsaturated fatty acids. The present invention also relates to methods of reducing neurodegeneration using cyclopropanated or epoxidized derivatives of mono- and polyunsaturated fatty acids.

Described herein are isolated regulatory peptides of protein kinase C, chimeric peptides thereof, and their variants. Use of the described peptides, in compositions and methods for treatment of cellular proliferation pathologies is also described.

The present invention relates to peptides for the treatment or prevention of diabetes mellitus and associated disorders.

The present invention relates to methods of activate an isoform of protein kinase C (PKC) for the treatment of neurological diseases including Alzheimer's disease and stroke using cyclopropanated or epoxidized derivatives of mono- and polyunsaturated fatty acids. The present invention also relates to methods of reducing neurodegeneration using cyclopropanated or epoxidized derivatives of mono- and polyunsaturated fatty acids.

Materials and methods for identifying modulators of protein function (e.g., enzyme activity), including modulators that target particular substrates for enzymes, are provided herein.

The disclosure provides an ex vivo method to prepare regulatory T cells, a population of regulatory T cells with enhanced properties and methods of using the population or complexes useful to induce Tregs in a mammal. The ex vivo methods allows for the generation and expansion of super regulatory T cells for the prevention, inhibition or treatment of autoimmune disorders.

A method of inhibiting the growth of cancer stem cells, including administering an effective amount of a protein kinase D1 expression or activity inhibitor as an active ingredient to a subject having cancer is provided. Further, a method of treating cancer, including administering an effective amount of a protein kinase D1 expression or activity inhibitor, and antitumor agent as active ingredients to a subject having cancer is provided. Further, a method for measuring expression or activity of protein kinase D1 for providing information of breast cancer prognosis, including a step of measuring expression or activity of protein kinase D1 in cells or tissues isolated from a subject is provided.

The present invention provides compositions and methods for enhancing the radiation resistance of a cell by modulating PKC and methods of preventing or treating radiation-mediated injury.