Macrophages as a means of cancer treatment? ? does it actually work? has it been tested on people?

Cancer can be combated with reprogrammed macrophage cells.
Researchers have generated antibodies that reprogram a type of macrophage cell in the tumor, making the immune system better able to recognize and kill tumor cells. The study, say the scientists, could lead to a new therapy and provide a potentially important diagnostic tool for breast cancer and malignant melanoma.