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Mutant gut bacteria reverse colon cancer in lab models
MedicalXpress.com ^ | June 13, 2012 | University of Florida/MedicalXpress

Posted on 06/17/2012 3:08:22 PM PDT by ConservativeMind

A mutant form of a meek microbe deals a gutsy blow to colon cancer, University of Florida scientists have discovered. The special bacteria halted abnormal inflammation, reduced precancerous growths and reversed progression of severe cancerous lesions in the large intestines of mice. The findings appear June 11 in the Proceedings of the National Academy of Sciences.

“We have demonstrated that our bacterial treatment can take on established colon cancer,” said principal investigator Mansour Mohamadzadeh, a professor in the UF College of Veterinary Medicine department of infectious diseases and pathology and a faculty member in the UF College of Medicine division of gastroenterology, hepatology and nutrition in the department of medicine. “This is huge, because people don’t come to you 10 years before they have colon cancer saying, ‘I may get colon cancer, can you treat me?’ They come to you and say, ‘I have colon cancer.’”

For years researchers have understood that uncontrolled inflammation in the large intestine can result in various diseases, including colon cancer and inflammatory bowel diseases such as ulcerative colitis. The new study focused on understanding how to curb immune system processes in the gut that lead to harmful inflammation. Resulting treatments could work not just for diseases of the digestive tract, but also for other conditions such as diabetes and Sjögrens syndrome in which inflammation plays a major role.

Some inflammation in the gut is a good thing, as it serves to keep the body’s immune system in tip-top, disease-fighting shape. But under stress, the immune system overreacts with a cascade of inflammation-causing reactions. That can lead to afflictions in which the immune system attacks instead of protects the body. It can even cause colon cancer, which kills more than 50,000 Americans every year and is one of the nation’s leading causes of cancer deaths, according to the National Institutes of Health.

Mohamadzadeh, a member of the UF Shands Cancer Center and the UF Emerging Pathogens Institute, and colleagues previously demonstrated that a genetically modified form of the beneficial bacterium Lactobacillus acidophilus can bring overactive immune responses back to normal. They have now found that proteins on the surface of the bacteria can act on the immune system to either cause inflammation in the gut or tune it down.

The researchers removed an inflammation-causing gene from the bacterium, and the result was a form of the bacteria that was even better at controlling disease-causing inflammation. Moreover, mice with severe cases of polyps and cancerous intestinal lesions that were fed the modified bacteria had significantly reduced numbers of colon polyps compared with untreated mice, and showed no signs of active colon cancer or disease-causing inflammation.

“This is a major discovery that defines how ‘healthy’ microbes function in the gut,” said Dr. Eugene B. Chang, the Martin Boyer professor of medicine at the University of Chicago Knapp Center for Biomedical Discovery. Chang was not involved in the UF study. “This has far-reaching implications for the development of therapies derived from microbes that can treat many types of complex immune and digestive disorders.”

The modified bacteria are easy and cost-effective to produce. Mohamadzadeh anticipates that a treatment for humans could be a pill that can be taken by mouth. Patients could receive the beneficial bacterial treatment in combination with surgery or other therapies.


TOPICS: Health/Medicine; Science
KEYWORDS: cancer; colon; coloncancer
This, and grape seed extract, are the only "natural" items I've seen studies on that have provably reversed colon cancer in mice.
1 posted on 06/17/2012 3:08:28 PM PDT by ConservativeMind
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To: ConservativeMind

To treat the underlying inflammation, that can cause all sorts of autoimmune problems as well as cancer, there is finally proof that common peppermint may work.

http://www.sciencedaily.com/releases/2011/04/110419101234.htm


2 posted on 06/17/2012 3:14:41 PM PDT by yefragetuwrabrumuy
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To: ConservativeMind

My gut feeling is to not get the bacterial treatment.


3 posted on 06/17/2012 3:34:11 PM PDT by BipolarBob ("These aren't the droids you're looking for.")
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To: ConservativeMind

I’m glad the lab models are feeling better. Perhaps they would appreciate a card, or some flowers.


4 posted on 06/17/2012 3:37:46 PM PDT by ClearCase_guy (On the subject of illegal immigrants: It's a case of Us against Them -- and Obama is one of Them.)
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To: ClearCase_guy

Hey, don’t make fun. Colon cancer is a tough thing. My mom died of it at 63, far too young.

I know I’m headed for it, probably. I have a very sensitive stomach, IBS type symptoms all the time.

I plan to get screened at 50, like everyone should — unless they have a big history, and then screening should start at 40.


5 posted on 06/17/2012 4:09:00 PM PDT by LibsRJerks
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To: All

It’s great being a lab rat.

Three square meals a day
Snacks
No cats, hawks or other critters to bother you
Every night, sweet-sweet-sweet muskrat love mmmm mmmm mmmm
Great healthcare plan
Great dental plan
and most of all....YOUR DISEASES ARE CURED!!!

And to top it off, a great “retirement” plan....it’s just that no one sees a retired lab rat....just vague promises and funny looking photos from a place called “Disney”.

Oh well. Pass the bacon bits.


6 posted on 06/17/2012 4:26:23 PM PDT by ak267
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To: ak267
Great dental plan and most of all....YOUR DISEASES ARE CURED!!!

But then they cut you up to find out why.
7 posted on 06/17/2012 4:35:30 PM PDT by aruanan
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To: BipolarBob
My gut feeling is to not get the bacterial treatment.

It may trigger the Zombie Apocalypse.

8 posted on 06/17/2012 5:11:08 PM PDT by PapaBear3625 (If I can't be persuasive, I at least hope to be fun.)
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To: neverdem

ping


9 posted on 06/17/2012 5:26:17 PM PDT by GOPJ (The 'doting court eunuchs' of the MSM fail to notice...)
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To: neverdem
...UF Shands Cancer Center and the UF Emerging Pathogens Institute, and colleagues previously demonstrated that a genetically modified form of the beneficial bacterium Lactobacillus acidophilus can bring overactive immune responses back to normal. They have now found that proteins on the surface of the bacteria can act on the immune system to either cause inflammation in the gut or tune it down.

Shands had a great reputation in Florida...

10 posted on 06/17/2012 5:28:23 PM PDT by GOPJ (The 'doting court eunuchs' of the MSM fail to notice...)
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To: LibsRJerks
...I have a very sensitive stomach, IBS type symptoms all the time...

Try Phillips Colon Health. I had the same thing for most of my adult life. Started taking those about a year ago. They worked for me within a few days. I can eat anything without fear now. Even Mexican food. :-)

11 posted on 06/17/2012 5:38:43 PM PDT by FReepaholic (Stupidity is not a crime, so you're free to go.)
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To: LibsRJerks
I know I’m headed for it, probably. I have a very sensitive stomach, IBS type symptoms all the time.

So do I but will never get colon cancer. I always tell my GP not to send me to a GI Specialist because people with non-ulcerative IBS never get colon cancer.

12 posted on 06/17/2012 5:38:47 PM PDT by steve86 (Acerbic by nature not nurture TM)
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To: yefragetuwrabrumuy
Interesting, thanks. I am just recovering from IBS right now. Do they mean peppermint candy? If I could find some not made with corn syrup I'd try it.
13 posted on 06/17/2012 5:42:03 PM PDT by Ditter
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To: FReepaholic
I thought I was the only patient having a particular issue with probiotics but it turns out there are many more (most recently taking Digestive Advantage Lactose Defense Formula but have had similar issues with others). What happens is everything is nominal and improved for a period of several months. Then, abruptly, the lower GI decides it has had enough of this programme and violently reacts with continued unpleasantries until we quit taking the probiotic. Then after a period of several more months we can take them again (which I do because of the lactose aid) but the same pattern reoccurs. I have a feeling I could space out the doses somewhat rather than daily and prevent this but it would be real tricky to not lose the lactose benefit then.
14 posted on 06/17/2012 5:48:31 PM PDT by steve86 (Acerbic by nature not nurture TM)
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To: yefragetuwrabrumuy

The reason I don’t use peppermint is because it causes breakthrough heartburn at the other end of the GI, is there some way around that?


15 posted on 06/17/2012 5:52:11 PM PDT by steve86 (Acerbic by nature not nurture TM)
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To: ConservativeMind

I’m a bit leery of using genetically altered bacteria. A more reasonable plan would be to eat a variety of natural bacteria found in fermented foods as well as lots of soluble fiber to keep your gut flora healthy.

For more information, see the blog - Cooling Inflammation by Dr. Art Ayers www.coolinginflammation.com

or the book, Wild Fermentation.


16 posted on 06/17/2012 7:04:51 PM PDT by Madam Theophilus
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To: Ditter; steve86

The most effective way of taking it was putting about a tsp of peppermint extract in a cup of water once or twice a day. It takes a few times before you get used to it, and a few to several days before the desired effect, but those who have tried it swear by it.

Peppermint has been used by herbalists for a very long time for this purpose, but only now is there a scientific justification for doing so.

I don’t know much about the heartburn issue.


17 posted on 06/17/2012 7:45:14 PM PDT by yefragetuwrabrumuy
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To: yefragetuwrabrumuy

Thanks I am seeing my gastrointerologist today, I will ask him about it.


18 posted on 06/18/2012 7:02:16 AM PDT by Ditter
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To: Ditter

http://www.umm.edu/altmed/articles/peppermint-000269.htm

This University of Maryland Medical Center evaluation is generally positive, with, “One study examined 57 people with IBS who received either enteric coated peppermint capsules or placebo twice a day for 4 weeks. Of the people who took peppermint, 75% had a significant reduction of IBS symptoms.”

As such, unless there is some other condition known to your doctor that would preclude this, you might try it as a home remedy, and a much less expensive one if you can choke down peppermint extract in water without heartburn.

I’ve read of some people who have just taken to chewing several peppermint Altoids after each meal.


19 posted on 06/18/2012 9:19:59 AM PDT by yefragetuwrabrumuy
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To: Ditter

I would suggest either grow your own peppermint or buy peppermint tea.


20 posted on 06/19/2012 5:58:57 AM PDT by Belasarius (Yet man is born unto trouble, as the sparks fly upward. Job 5:2-7)
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