targeting bc stem cells with cancer preventative s curcumin and piperine

[Lani]

Breast Cancer Res Treat. 2009 Nov 7. [Epub ahead of print]
Targeting breast stem cells with the cancer preventive compounds curcumin and piperine.
Kakarala M, Brenner DE, Korkaya H, Cheng C, Tazi K, Ginestier C, Liu S, Dontu G, Wicha MS.

Division of Hematology/Oncology, Department of Internal Medicine and Comprehensive Cancer Center, University of Michigan, 2150 Cancer Center, 1500 E. Medical Center Dr., Ann Arbor, MI, USA, mkakaral@umich.edu.
The cancer stem cell hypothesis asserts that malignancies arise in tissue stem and/or progenitor cells through the dysregulation or acquisition of self-renewal. In order to determine whether the dietary polyphenols, curcumin, and piperine are able to modulate the self-renewal of normal and malignant breast stem cells, we examined the effects of these compounds on mammosphere formation, expression of the breast stem cell marker aldehyde dehydrogenase (ALDH), and Wnt signaling. Mammosphere formation assays were performed after curcumin, piperine, and control treatment in unsorted normal breast epithelial cells and normal stem and early progenitor cells, selected by ALDH positivity. Wnt signaling was examined using a Topflash assay. Both curcumin and piperine inhibited mammosphere formation, serial passaging, and percent of ALDH+ cells by 50% at 5 muM and completely at 10 muM concentration in normal and malignant breast cells. There was no effect on cellular differentiation. Wnt signaling was inhibited by both curcumin and piperine by 50% at 5 muM and completely at 10 muM. Curcumin and piperine separately, and in combination, inhibit breast stem cell self-renewal but do not cause toxicity to differentiated cells. These compounds could be potential cancer preventive agents. Mammosphere formation assays may be a quantifiable biomarker to assess cancer preventive agent efficacy and Wnt signaling assessment can be a mechanistic biomarker for use in human clinical trials.

PMID: 19898931

[Rich66]

Well..I got excited..but..the researcher tells me those levels can't be achieved orally and that high dose curcumin supps should be avoided during chemo. Working on a way to deliver it as a therapy.

[Tom]

Hi Rich,

I have always been trying to firm up my opinions regarding curcumin use during chemo, as chemo often works by creating free radicals. Here is an article that may shed some light on that question. It relates to curcumin's ability as a radiosensitizer, but discusses free radical promotion as well. Other research suggests that it acts as a powerful radiosensitizer in the treatment of many forms of cancer. At this time I am of the opinion (based on research), that curcumin should be used during radiation therapy, but should not (at least yet) be used during traditional chemotherapy. I would add that I feel it is fine to use it during Herceptin therapy. As always, these are just my opinions based on the research I read.

http://molpharm.aspetjournals.org/co...73/5/1491.full

Tom

[Rich66]

Oh..these things always have another hand:
http://her2support.org/vbulletin/showthread.php?t=41672