Apple is a rich source of bioactive
phytochemicals that help improve health by preventing and/or curing many disease processes, including
cancer. One of the apple
polyphenols is
phloretin [2',4',6'-Trihydroxy-3-(4-hydroxyphenyl)-propiophenone], which has been widely investigated for its
antioxidant, anti-inflammatory and anti-
cancer activities in a wide array of preclinical studies. The efficacy of
phloretin in suppressing xenograft
tumor growth in athymic nude mice implanted with a variety of human
cancer cells, and the ability of the compound to interfere with
cancer cells signaling, have made it a promising candidate for anti-
cancer drug development. Mechanistically,
phloretin has been reported to arrest the growth of
tumor cells by blocking
cyclins and
cyclin-dependent kinases and induce apoptosis by activating mitochondria-mediated cell death. The blockade of the glycolytic pathway via downregulation of GLUT2
mRNA and
proteins, and the inhibition of
tumor cells migration, also corroborates the anti-
cancer effects of
phloretin. This review sheds light on the molecular targets of
phloretin as a potential anti-
cancer and anti-inflammatory natural agent.