Diallyl trisulfide, a chemopreventive agent from Allium vegetables, inhibits alpha-secretases in breast cancer cells.
Breast cancer affects one in eight women throughout the course of their lifetime creating a demand for novel prevention strategies against this disease. The Notch signaling pathway is often aberrantly activated in human malignancies including breast cancer. Alpha secretases, including ADAM (A Disintegrin and Metalloprotease) -10 and -17, are proteases that play a key role in the cleavage of cell surface molecules and subsequent ligand-mediated activation of Notch signaling pathway. High expression levels of ADAM10 and 17 have been clinically associated with a lower disease-free survival in breast cancer patients. This study was undertaken to determine the effect of diallyl trisulfide (DATS), a bioactive organosulfide found in garlic and other Allium vegetables, on alpha secretases in breast cancer cells. Here we report for the first time that DATS inhibits the expression of ADAM10 and ADAM17 in estrogen-independent MDA-MB-231 and estrogen-dependent MCF-7 breast cancer cells, and in Harvey-ras (H-Ras) transformed MCF10A-H-Ras breast epithelial cells. We also show that DATS induces a dose-dependent reduction in colony formation ability of MDA-MB-231 and MCF-7 cells, suggesting a long-term effect of DATS on growth inhibition of breast cancer cells. Furthermore, we show that DATS inhibits the Notch ligands Jagged-1 and Jagged-2 involved in activation of Notch signaling pathway. Collectively, these findings show that DATS targets Notch pathway components overexpressed in breast cancer tumors and may serve as a functionally relevant bioactive for breast cancer prevention.
Department of Nutrition Science, 201 South University Street, West Lafayette, IN, 47907, United States.
Violet A
VA
Kiesel
Department of Nutrition Science, 201 South University Street, West Lafayette, IN, 47907, United States; Purdue University Center for Cancer Research, 201 South University Street, West Lafayette, IN, 47907, United States. Electronic address: stand@purdue.edu.
Silvia D
SD
Stan
D000490:Allium / Q000737:chemistry*; D000498:Allyl Compounds / Q000008:administration & dosage*; D053829:Amyloid Precursor Protein Secretases / Q000037:antagonists & inhibitors*; D016588:Anticarcinogenic Agents / Q000008:administration & dosage*; D001943:Breast Neoplasms / Q000201:enzymology* / Q000473:pathology / Q000517:prevention & control*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D004220:Disulfides / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D000072100:Jagged-1 Protein / Q000037:antagonists & inhibitors; D000072101:Jagged-2 Protein / Q000037:antagonists & inhibitors; D061986:MCF-7 Cells; D014675:Vegetables
D000498:Allyl Compounds; D016588:Anticarcinogenic Agents; D004220:Disulfides; C000606273:JAG1 protein, human; C490504:JAG2 protein, human; D000072100:Jagged-1 Protein; D000072101:Jagged-2 Protein; C028009:diallyl disulfide; D053829:Amyloid Precursor Protein Secretases
Alpha secretases; Breast cancer; Diallyl trisulfide; Notch ligands