Fecal Incontinence May Surrender to Stem Cells

While recently visiting Seattle with my daughter, we had the pleasure of talking with Dr. Ghislaine Robert, owner of Sparclaine Regenerative Medicine. She is a highly respected sports medicine doctor who has steered much of her practice towards regenerative medicine, with a focus on stem cell and platelet enriched plasma (PRP) injections. She brought to my attention the use of stem cells for pelvic floor disorders. And, like any successful practitioner, she encouraged me to research it for myself.

In 2015, Cestaro et al. reported early results of 3 patients with fecal incontinence receiving intersphincteric anal groove injections of fat tissue. They aspirated about 150ml of the fat tissue and used the Lipogem system technology lipofilling technique to provide micro-fragmented and transplantable clusters of lipoaspirate. The intersphincteric space was then injected with the lipoaspirate. A proctology exam was performed at 1 week, 1 month, and 6 months following the procedure. All 3 patients all had reduced Wexner incontinence scores 1 month post-treatment and a significant improvement in quality of life 6 months post-procedure. Resting pressure of the internal anal sphincter increased after 6 months, and the internal anal sphincter showed increased thickness.

A 2016 study by Mazzanti et al., used rats to explore whether unexpanded bone marrow-derived mononuclear mesynchymal cells (MNC) could effectively repair anal sphincter healing since expanded ones (MSC) had already been shown to enhance healing after injury in a rat model. They divided 32 rats into 4 groups: sphincterotomy and repair (SR) with primary suture of anal sphincters and a saline intrasphincteric injection (CTR); SR of anal sphincter with in-vitro expanded MSC; SR of anal sphincter with minimally manipulated MNC; and, a sham operation with saline injection. Muscle regeneration as well as contractile function was observed in the MSC and MNC groups, while the control surgical group demonstrated development of scar tissue, inflammatory cells and mast cells between the ends of the interrupted muscle layer 30 days post-surgery. Ultimately, the authors found no significant difference between expanded or unexpanded bone marrow stem cell types used. Post-sphincter repair can be enhanced by stem cell therapy for anal incontinence, even when the cells are minimally manipulated.

Finally, in 2017, Sarveazad et al. performed a double-blind clinical trial in humans using human adipose-derived stromal/stem cells (hADSCs) from adipose tissue for fecal incontinence. The hADSCs secrete growth factor and can potentially differentiate into muscle cells, which make them worth testing for improvement of anal sphincter incontinence. They used 18 subjects with sphincter defects, 9 undergoing sphincter repair with injection of hADSCs and 9 having surgery with a phosphate buffer saline injection. After 2 months, there was a 7.91% increase in the muscle mass in the area of the lesion for the cell group compared to the control. Fibrous tissue replacement with muscle tissue, allowing contractile function, may be a key in the long term for treatment of fecal incontinence.

As long as accessing human-derived stem cells is a viable option for patients, the preliminary studies show promise for success. With fecal incontinence being such a debilitating problem for people, especially socially, stem cells are definitely an up and coming treatment, and we should all keep up on this research. After all, who wouldn’t spare some adipose tissue for life-changing, functional gains?

Cestaro, G., De Rosa, M., Massa, S., Amato, B., & Gentile, M. (2015). Intersphincteric anal lipofilling with micro-fragmented fat tissue for the treatment of faecal incontinence: preliminary results of three patients. Videosurgery and Other Miniinvasive Techniques, 10(2), 337–341. http://doi.org/10.5114/wiitm.2014.47435
Mazzanti, B., Lorenzi, B., Borghini, A., Boieri, M., Ballerini, L., Saccardi, R., … Pessina, F. (2016). Local injection of bone marrow progenitor cells for the treatment of anal sphincter injury: in-vitro expanded versus minimally-manipulated cells. Stem Cell Research & Therapy, 7, 85. http://doi.org/10.1186/s13287-016-0344-x
Sarveazad, A., Newstead, G. L., Mirzaei, R., Joghataei, M. T., Bakhtiari, M., Babahajian, A., & Mahjoubi, B. (2017). A new method for treating fecal incontinence by implanting stem cells derived from human adipose tissue: preliminary findings of a randomized double-blind clinical trial. Stem Cell Research & Therapy, 8, 40. http://doi.org/10.1186/s13287-017-0489-2