Effects of Bacteria on Ulcerative Colitis
Posted by admin | Posted in Probiotics | Posted on 06-01-2011
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Below is an excerpt from an interesting article I have just been reading on intestinal bacteria, I’ve posted the bit which discusses Colitis but you can read the whole article here

Many researchers are focusing on inflammatory bowel disorders to understand how the balance between the intestinal microbes and their human hosts becomes deranged. Incidence of these diseases has sharply increased since about the mid-20th century, just about the time the industrialized world started eating highly processed foods and antibiotics came into widespread use. For example, in bowel disorders such as Crohn’s disease and ulcerative colitis, excessive inflammation leads to severe pain, diarrhea and vulnerability to opportunistic germs. Standard treatments include powerful steroids like prednisone, surgical removal of the colon and heavy treatment with antibiotics.
But a more ecological approach is beginning to offer hope. P. aeruginosa and C. difficile are common residents of human bodies and under normal circumstances are benign. So what turns them into enemies? Most of the time, says John Alverdy, an intestinal and critical-care surgeon at the University of Chicago, bacteria “have to have a reason to hurt you.” Surgery is just such a reason. A surgical patient’s normal metabolism is altered; usually nutrients are provided intravenously instead of through the digestive system, so in a patient being fed by an IV drip, the gut bacteria perceive their sustenance disappearing. A decline in available nutrients alarms them. And surgery triggers the release of stress compounds that bacteria also sense, Alverdy says. Chemotherapy and radiation have similar effects. When threatened, bacteria become defensive, often producing toxins that make the host even sicker. They also tend to speed up their acquisition of and purging of genes when under external selection pressure, of which antibiotics are an obvious and powerful example.
Alverdy is finding success in treating patients with a strategy he calls “ecologic neutrality.” In research reported in the August 2008 Surgery, he was able to prevent P. aeruginosa from turning virulent in surgically stressed mice by dosing them with polyethylene glycol, which supplies the bacteria with phosphate, one of their primary needs. “Once they sense there’s plenty of phosphate,” he says, “they figure everybody must be happy here.” The treated mice in his experiments, unlike the controls, did not contract fatal infections.
Some researchers are even exploring the idea of stool transplants — that is, introducing a healthy person’s gut bacteria into a sick person’s intestines via the donor’s feces. Although there are not many peer-reviewed studies of this rather disturbing concept, a review in the July 2004 Journal of Clinical Gastroenterology by Australian researcher Thomas Borody found that in a large majority of the cases reported in the medical literature, fecal transplants resulted in almost immediate and long-lasting relief for people suffering from inflammatory bowel conditions and for those with chronic antibiotic-induced diarrhea. (There’s definitely a market for fecal transplants. When one scientist mentioned the success of the procedure in an interview with The Wall Street Journal, he was inundated with calls from desperate patients begging for the treatment, even though he does not practice the therapy.)
If new therapies based on human microbial ecology just lessened antibiotic resistance and relieved the suffering of people with intestinal disorders, they would constitute miraculous advances. But the intensifying focus on the role of bacteria in human health is turning up other possible avenues for improving health.
This is an excerpt from an article posted on Miller-McCune.com by Valerie Brown

