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Incontinence & Overactive Bladder Health Center

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Stem Cells Help Urinary Incontinence?

Researchers See Improvement in Some Patients Who Get Stem Cell Injections
WebMD Health News
Reviewed by Louise Chang, MD

June 28, 2007 -- Injections of stem cells and other cells obtained from a woman's own body can treat stress urinary incontinence with dramatically better results than conventional collagen injections, according to a new study from Austria.

The results, which mimic those from similar research under way in the U.S., might also be long-lasting. "The treatment might have a chance to be permanent," Giacomo Novara, MD, a doctor at the University of Padua in Italy, tells WebMD in an email interview. Novara wrote a comment accompanying the study. Both appear in the June 30 issue of The Lancet.

More than 13 million women in the U.S. suffer from stress urinary incontinence, a condition much more common in women than in men. The condition develops as the urethral sphincter muscles, which control the flow of urine, weaken, typically after childbirth or with age. When a person coughs, sneezes, or laughs, urine can leak.

The Austrian Study

The Austrian researchers, led by Hannes Strasser, MD, from the Medical University of Innsbruck, compared the effects of the stem cell injections with conventional injections of collagen in 63 women with stress urinary incontinence.

They first performed a small muscle biopsy on the upper arms of the 42 women assigned to get the stem cell injections. In the laboratory, they retrieved myoblasts, a type of muscle stem cell, and fibroblasts, cells which form the structural framework for many body tissues. Both types of cells have been shown effective in reconstructing the lower urinary tract in animal studies, according to Strasser.

Next, guided by ultrasound, Strasser's team injected the cells back into the women's sphincter and surrounding area.

Traditional collagen injections, which don't typically have a high success rate for incontinence, were given to the other 21 women. Collagen treatments work by bulking up the area to compress the urethra -- helping to hold urine.

After 12 months, 38 of the 42 women given the stem cell and other cell injections were completely continent. The other four showed either slight or substantial improvement. But just two of the 21 who got collagen injections were continent; seven others showed either slight or substantial improvement.

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