Disclosed are methods of using blastomere-like stem cells to (1) decrease the level of myeloid-derived suppressor cells, (2) modulate immune response, (3) overcome a myeloid-derived suppressor cell-mediated immunosuppression, and (4) treat a cellular proliferative disorder. The blastomere-like stem cells, positive for CD66e, can be isolated from blood, bone marrow, or skeletal muscle.
