Abstract: A method of obtaining a population of cells enriched in human polymorphonuclear myeloid derived suppressor cells (PMN-MDSCs) comprises isolating from a cell suspension those cells which express LOX-1 to provide a population of cells enriched with PMN-MDSCs. A method of monitoring the population of LOX-1+ cells in a cell-containing biological sample is useful for determining the efficacy of treatment or the metastasis or increasing progression of cancer. Other cell isolation and diagnostic methods are also described. A composition for use in diagnosing and treating cancer related to PMN-MDSC is provided that contains antagonists and/or inhibitors of genes related to the ER stress response.

Abstract: Provided herein are methods and compositions comprising constructs that include two or more truncated T3SS bacterial effector polypeptides. Also provided are pharmaceutical compositions comprising the constructs and methods of treatment of inflammatory disorders based on administering such constructs.

Abstract: Provided herein are methods and compositions comprising a set of paired peptides comprising a first bacterial effector polypeptide or fragment thereof linked to a second bacterial effector polypeptide or fragment thereof. The paired peptides can be linked to a protein transduction domain. The compositions can be formulated as pharmaceuticals. The compositions are useful for the treatment of inflammatory disorders.