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Injecting stem cells from a woman's own muscle may effectively treat urinary incontinence
May 22, 2006In the first clinical study of its kind in North America, women with stress urinary incontinence (SUI) were treated using muscle-derived stem cell injections to strengthen deficient sphincter muscles responsible for the condition. Results of the study, led by researchers at the University of Pittsburgh School of Medicine and Sunnybrook Health Sciences Centre in Toronto, suggest that the approach is safe, improves patients' quality of life and may be an effective treatment for SUI. The findings will be presented at an experts' session at the annual meeting of the American Urological Association (AUA) in Atlanta, and will be published in abstract 1185 in the AUA proceedings.
"The technique to achieve optimal efficacy is evolving, but we are pleased with what this study has shown," said principal investigator Lesley Carr, M.D., urologist at Sunnybrook Health Sciences Centre and assistant professor at the University of Toronto. "We now have preliminary evidence that stem cells are safe to use and appear to improve female stress urinary incontinence."
Previous studies at the University of Pittsburgh School of Medicine in animal models with SUI demonstrated that injecting stem cells into the urethral muscles increases leak point pressure, leading to a restoration of the deficient muscles. The results of these studies formed the basis for the clinical trial.
"Our preliminary findings in this clinical trial are extremely encouraging, given that 13 million people, most of them women, cope with stress urinary incontinence in the United States," said Michael B. Chancellor, M.D., the study's senior author and professor of urology and gynecology at the University of Pittsburgh School of Medicine. "We're demonstrating for the first time that we may be able to offer people with SUI a long-term and minimally invasive treatment."
In the study, researchers took biopsies of skeletal muscle tissue from seven female patients and isolated and expanded the stem cells from the tissue in culture. In an outpatient setting, the patients then received injections of the muscle-derived stem cells into the area surrounding the urethra. Each patient received an equal dose of stem cell injections using three different injection techniques - a transurethral injection with either an 8-mm or 10-mm needle or a periurethral injection.
Five of the seven women who participated in the study reported improvement in bladder control and quality of life with no serious short- or long-term adverse effects. These improvements were associated with both the 10-mm needle injections and the periurethral injections, which allowed the investigators to deliver the stem cells close to the damaged sphincter muscle. The 8-mm needle was not able to deliver the muscle stem cells deep enough into the tissue to reach the sphincter.
A follow-up multi-site study set to launch this summer will allow researchers to determine the optimal dose of muscle stem cells needed to effectively treat SUI.
Women with SUI involuntarily lose urine during activities that put pressure on the bladder, such as running, coughing, sneezing or laughing. Stress incontinence is caused by childbirth, menopause or pelvic surgery and is most often diagnosed in women during middle-age.
Sunnybrook Health Sciences Centre
"Our preliminary findings in this clinical trial are extremely encouraging, given that 13 million people, most of them women, cope with stress urinary incontinence in the United States," said Michael B. Chancellor, M.D., the study's senior author and professor of urology and gynecology at the University of Pittsburgh School of Medicine. "We're demonstrating for the first time that we may be able to offer people with SUI a long-term and minimally invasive treatment."
In the study, researchers took biopsies of skeletal muscle tissue from seven female patients and isolated and expanded the stem cells from the tissue in culture. In an outpatient setting, the patients then received injections of the muscle-derived stem cells into the area surrounding the urethra. Each patient received an equal dose of stem cell injections using three different injection techniques - a transurethral injection with either an 8-mm or 10-mm needle or a periurethral injection.
Five of the seven women who participated in the study reported improvement in bladder control and quality of life with no serious short- or long-term adverse effects. These improvements were associated with both the 10-mm needle injections and the periurethral injections, which allowed the investigators to deliver the stem cells close to the damaged sphincter muscle. The 8-mm needle was not able to deliver the muscle stem cells deep enough into the tissue to reach the sphincter.
A follow-up multi-site study set to launch this summer will allow researchers to determine the optimal dose of muscle stem cells needed to effectively treat SUI.
Women with SUI involuntarily lose urine during activities that put pressure on the bladder, such as running, coughing, sneezing or laughing. Stress incontinence is caused by childbirth, menopause or pelvic surgery and is most often diagnosed in women during middle-age.
Sunnybrook Health Sciences Centre
Urinary Incontinence Current Events and Urinary Incontinence News RSSPivotal study for PSD502 -- the first potential treatment for premature ejaculation
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New finding suggests prostate biopsy is not always necessary
Researchers at Wake Forest University School of Medicine and the University of Wisconsin-Madison have discovered that some elevated prostate-specific antigen (PSA) levels in men may be caused by a hormone normally occurring in the body, and are not necessarily a predictor of the need for a prostate biopsy.
Pelvic floor muscle exercises can help manage urinary incontinence in older women
Researchers at Rush University Medical Center have found that a program of pelvic floor muscle exercises, combined with pelvic health education, can be an effective way to manage urinary incontinence in elderly women.
Study finds no link between cognitive decline, socioeconomic status in elderly
New UCLA research suggests that for seniors age 70 and older, socioeconomic status does not play a major role in the brain's continued ability to function.
Uterus sparing surgery is a safe and effective treatment for pelvic organ prolapse
Researchers presented data at the 104th Annual Scientific Meeting of the American Urological Association (AUA) showing that uterus sparing surgery is an effective and safe treatment for women who want to preserve the integrity of vaginal function after pelvic organ prolapse.
Autologous muscle-derived cells may treat stress urinary incontinence
Researchers have confirmed that transplanting autologous muscle-derived cells (AMDC) into the bladder is safe at a wide range of doses and significantly improves symptoms and quality of life in patients with stress urinary incontinence.
M. D. Anderson study finds pre-surgical stress management improves mood, quality of life
Brief stress management sessions prior to and immediately after surgery may have both short- and long-term benefit for men undergoing a radical prostatectomy for early-stage prostate cancer.
Collagen injections can help some incontinence patients when surgery fails, researcher finds
Collagen injections can benefit women who still suffer from stress urinary incontinence (SUI) even after urethral or periurethral surgery, a UT Southwestern Medical Center researcher has found.
Weight Loss Reduces Incontinence for Women
Starting a weight-loss regimen significantly reduces urinary incontinence for women, according to researchers at the University of Alabama at Birmingham (UAB) and the University of California, San Francisco.
Bittersweet milestones
For many of the elderly, the golden years are anything but. Faced with health problems, financial issues and the death of a spouse or loved one, many adults 65 years and older suffer from depression. While research is emerging to help this group understand and treat the problem, another group - centenarians - has been left largely in the dark.
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