Mayo EGCG study

Thanks to Don (see the link to his blog, Myeloma Hope, on the right), Sherlock and I found out about a 2005 Mayo Clinic study on EGCG (green tea extract, see my permanent page for more information). Sherlock looked it up and sent me the full study (abstract, 2006:, which I read this morning. I almost cried with joy.

In a nutshell, after reading a Mayo in vitro report on EGCG’s annihilation of human CLL (chronic lymphocytic leukemia) cells, several Mayo (and probably non Mayo!) patients with CLL began taking this extract on their own. The researchers report that they became “aware of four patients with low-grade B malignancies,” who “appeared to have an objective clinical response.” Three of them achieved partial response (PR). I would like to note that their markers had been worsening before they began taking EGCG: “Several patients presented here had documented steady clinical, laboratory, and/or radiographic evidence of progression immediately prior to initiation of over-the-counter green tea products and then developed objective responses shortly after self-initiating this therapy.”

A "quick" parenthesis. During the discussion period at the NF-kB-curcumin-cancer conference on Saturday (see previous post), I was sitting up front with the other panel members, facing the audience. Next to me was a very nice doctor, I think a urologist (but wouldn’t bet my life on that). Well, in response to a question about why the Tuscan Regional Government doesn’t promote the use of curcumin, since it works for so many patients, scientific studies support its use in cancer treatment, AND it’s cheaper than many drugs, the good doctor answered, more or less, that science needs time, that anecdotal evidence is not scientific proof, that we have to wait until clinical trials are set up, the results published, blablabla. (I wish this cautious man had been on the Avastin committee, by the way!)
I waited until he had finished, took the microphone, and replied “you are right. Science needs time. But we are patients, cancer patients, and we don’t have that kind of time. If, for instance, I had waited for the results of the MD Anderson curcumin-myeloma clinical trial to be published, I don’t know how I would be doing right now. The first results from the trial were presented in December 2007, that is, almost two years after I began taking curcumin.” I forget what I added, but the tape should remind me (and perhaps slightly amend what I just wrote). At any rate, as I remember (!), he agreed that I was right.

Obviously, I am NOT suggesting that we (cancer patients) go out and try just ANYTHING. That would be absurd and dangerous. Beware of websites that tell you that they can cure your cancer! Avoid those like the plague.

But some substances, such as curcumin extracted from turmeric and EGCG from green tea, have been used for centuries to treat all sorts of ailments, as we know. So I am talking about "ancient" non toxic substances that have in recent years been studied in vitro and in vivo and have scientifically-proven anticancer and chemopreventive effects. These results are not anecdotal anymore. I am not the only myeloma patient to have had success with curcumin (sure, a few haven’t achieved similar results, but that is why we, patients, have to TRY it to see if it works in our particular situation).

My stance is, therefore: what’s the harm in trying a scientifically-proven, non toxic substance for eight weeks to see if your markers improve? If they do, then why not continue taking it? Unless, of course!, you have some health issue such as obstructed bile ducts in the case of curcumin (see my Warnings page).

Okay, so the parenthesis wasn’t "quick" at all!  Let’s have a close look at the Mayo EGCG study. The full study.
According to the Mayo researchers, “EGCG also reduced levels of the protein Mcl-1, an anti-apoptotic protein of known importance in CLL B-cell resistance to apoptosis,” at very very low doses. As usual, I looked up this protein in reference to multiple myeloma, and DUH!, wouldn’t you know it!, the blasted thing turns out to be “essential” for the survival of human myeloma cells in vitro, see abstract: Essential! 
The study provides a detailed description of four CLL cases. Patient number 1 is a 58-year-old woman diagnosed with the “small lymphocytic lymphoma (SLL) variant of CLL/SLL,” whose BMB in 2003, 20 months after diagnosis, showed a “20–25% marrow involvement by CLL/SLL B-cells.” She began taking an OTC (over the counter) green tea supplement containing 315 mg of tea polyphenols. Twice a day. Within a year, “she demonstrated a steady clinical and radiographic decline in her lymphadenopathy with >50% reduction in bilateral axillary nodes and near normalization in the size of all other areas of adenopathy. The patient’s reduction in lymph node size met the NCI criteria for a partial response (PR).” She is doing well (this report was written at 44 months after her diagnosis) and “has not required conventional therapy.”
Patient number 2, a woman, 55 years old, was diagnosed with stage IV disease, asymptomatic. She began drinking a cup of green tea every day ( = two tea bags). Result, 20 months after her initial diagnosis: “>50% decrease in the sum of the products of the six largest lymph node areas consistent with a PR according to the International Working Group criteria for non-Hodgkins lymphoma.”
Patient 3, woman, 50 years old. Five years after being diagnosed with Rai stage 0 CLL (see here for info on CLL staging:, her absolute lymphocyte count (or ALC) increased, and she developed night sweats and fatigue (that sounds so familiar to me: back in the pre-curcumin era, in 2005, I had both of those symptoms). After reading the Mayo report, she began using a green tea patch, “labeled as containing 300 mg polyphenols,” and drinking three green tea packets a day (300 mg polyphenols per packet). Just one month later her markers had improved. At the time of the report, 77 months after her diagnosis, even though she discontinued the patch and was drinking only one packet of green tea per day, she was classified as stable. No conventional therapy.
The last patient mentioned in the Mayo report is a 60-year-old woman diagnosed with Rai stage 0 CLL in 1995. In 2004 her WBC (white blood count) and ALC increased. This concerned her, so (again, after reading the Mayo in vitro report) she began drinking eight cups of green tea per day. After just one week (ONE WEEK!) her markers had improved. She continued drinking green tea, and her ALC decreased by 50%. 120 months from diagnosis, she “is still asymptomatic from her CLL.”
The discussion part of the study tells us that “In total, our report on these patients with low grade B-cell malignancies adds to the growing evidence that food products that contain polyphenols have anti-tumor activity. In fact, the polyphenol containing agents have not only been shown to have anti-tumor activity but have been linked to chemoprevention of human tumors. A number of epidemiologic studies have linked consumption of green tea to a decreased risk of cancer. A wide range of animal models has also supported green tea’s ability to prevent tumorigenesis. Multiple mechanisms have been proposed as the explanation of the effect of green tea, including anti-angiogenic properties, DNA damage, and inhibition of telomerase. More recent studies of EGCG suggest this agent may affect folate metabolism, suppress transcription factors leading to cell-cycle arrest, and induce oxidative stress through generation of ROS. In vitro studies have also shown EGCG decreases levels of anti-apoptotic proteins at drug levels which are achieved in the serum of tea drinkers in vivo.” Sorry for this tremendously long quote, but there was really no way to summarize or shorten it.

The Mayo report is about CLL patients, of course, but let’s not forget that EGCG has been shown to work against myeloma cells, too. And in fact I am in touch with quite a number of MGUS and SMM folks who take this supplement or drink green tea. Successfully. So now I am more curious than ever to find out how Sherlock and I will do on one gram of EGCG combined with our eight grams of curcumin.

Oh, another important note: the study points out that EGCG should be taken on an empty stomach: “The plasma concentration of free EGCG could be increased five-fold when taken in fasting conditions rather than with food.” If you choose to drink green tea (té verde, in Italian) rather than take an EGCG supplement, by the way, well, in this photo Priscilla, my two-year-old cat, demonstrates how to drink it properly (raise your cup to your mouth…just like this). Sorry, couldn’t resist, she is TOO cute.

The Mayo researchers’ final words, which echo the above-mentioned Italian conference doctor’s thoughts: “These anecdotes cannot determine the effectiveness of tea polyphenols, and highlight the need for clinical trials to define the optimal dosing, schedule, toxicities, and clinical benefits before widespread use can be recommended.” The Mayo EGCG clinical trial is currently recruiting CLL patients, by the way:
Well, in my opinion, the Mayo report shows that sometimes we patients just have to jump the gun…proceeding, of course, with well-informed, scientifically-based caution, as always.