Some components in green tea may prevent the drug Velcade, a widely used cancer agent also called bortezomib, from killing cancerous tumor cells, according to researchers from the University of Southern California Keck School of Medicine in Los Angeles.
In lab studies scientists evaluated the impact of green tea compounds on the efficacy of bortezomib against multiple myeloma, a blood cancer, and glioblastoma, a malignant brain tumor.
Velcade normally fights cancer by inducing tumor cell death. However scientits were surprised to find that some of the green tea polyphenols and other components actually prevented bortezomib from killing tumor cells.
While green tea components appear to interfere with the ability of Velcade to combat cancer, other cancer-fighting drugs may not be affected. According to the study green tea is a proven beneficial herb that has been shown to improve the anticancer effects of other drugs.