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Research Explores Herbal Treatment For
Recurring Urinary Tract Infection
April 12, 2007
A common herbal extract available in health food stores can greatly reduce
urinary tract infections and could potentially enhance the ability
of
antibiotics to kill the bacteria that cause 90 percent of infections in the
bladder.
Researchers at Duke University Medical Center, in a series of experiments in
mice, believe they have also discovered why many urinary
tract infections in
the bladder return even after treatment with antibiotics. They found that
some bacteria hide in cells lining the bladder,
where they cannot be reached
by antibiotics. But they also found that forskolin, an extract from the
Indian coleus plant, flushes out hiding
colonies of bacteria, making them
susceptible to antibiotic treatment.
About 90 percent of urinary tract infections in the bladder are caused by E.
coli bacteria. These infections afflict women four times as often
as men,
and in a large number of cases, the infection returns within weeks of
antibiotic treatment.
The research was led by Duke microbiologist Soman Abraham, Ph.D., who
published the results online April 8, 2007, in the journal Nature
Medicine.
The research was supported by the National Institutes of Health.
The lining of the bladder is a highly impenetrable surface, Abraham said.
Special pouchlike structures within the lining enable the bladder to
stretch
as it fills with urine. However, when infected, the pouches can create tiny
niches that some opportunistic E. coli can slip into and
hide.
"After customary antibiotic treatment, the vast majority of the bacteria are
either killed by the antibiotics or eliminated during urination,"
Abraham
said. "However, there are small numbers of bacteria that survive antibiotic
treatment because they sneak into the lining of the
bladder, waiting for the
opportunity, after antibiotic treatment, to come out and start multiplying
again."
The researchers found that forskalin has the ability to force the bacteria
out of their niches and into the urine, where they can be killed by
antibiotics.
Abraham said that forskalin's action makes intuitive sense, since the herb
is known to rev up certain cellular activity. This heightened activity
in
the bladder causes the specialized pouches to "flush out" their contents --
in this case, the hiding E. coli.
"This herb has been used in Asia for centuries for a wide variety of
ailments," Abraham said. "However, one of its constant uses has been
for
treating painful urination."
Today, forskalin is added to bodybuilding products and marketed for its
ability to increase lean body and bone mass, as well as to increase
testosterone levels. The herb also has been claimed to be an effective
weight-loss aid. Herbal extracts such as forskalin are not tested nor
regulated by the Food and Drug Administration. Abraham recommends that
anyone with a urinary tract infection should contact their
physician before
trying forskalin.
In the latest experiments, the researchers injected forskalin directly into
the bladder or administered it intravenously. The herb appeared to
expel
more than 75 percent of the hiding E. coli. The researchers next will
determine whether or not the herb is effective when mice receive
it orally,
since that is how it would be used in humans. The experiments also will
combine the use of forskalin and antibiotics.
"This type of treatment strategy may prove to be beneficial for patients
with recurrent urinary tract infections," Abraham said. "Ideally, use
of
this herb would expel the bacteria, where it would then be hit with
antibiotics. With the reservoir of hiding bacteria cleared out, the
infection should not recur."
Abraham said that a new and effective approach for treating urinary tract
infections is needed, because constant antibiotic use has many
drawbacks,
including high expense, possible liver and kidney damage and the potential
for creating strains of antibiotic-resistant bacteria.
----------------------------
Article adapted by Medical News Today from original press release.
http://www.medicalnewstoday.com
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