The present invention relates to immortalized human cells particularly useful for cell encapsulation therapy and methods of preparation and use thereof.

Disclosed herein are genetically engineered hematopoietic cells, which express one or more lactate-modulating factors (e.g., polypeptides), and optionally a chimeric receptor polypeptide (e.g., an antibody-coupled T cell receptor (ACTR) polypeptide or a chimeric antigen receptor (CAR) polypeptide) capable of binding to a target antigen of interest. Also disclosed herein are uses of the engineered hematopoietic cells for inhibiting cells expressing a target antigen in a subject in need thereof.

A peptide composition is provided which specifically inhibits the ability of -protein kinase C (PKC) to phosphorylate pyruvate dehydrogenase kinase (PDK) under ischemic conditions. The peptide composition is useful for treating or reducing tissue damage resulting from ischemia and/or reperfusion.