Exosome Therapy for Pelvic Tissue Regeneration

Stem cell therapies initially generated excitement in regenerative medicine, but their clinical translation has been limited by challenges with cell delivery and viability. Exosomes, by contrast, provide a cell-free option that delivers regenerative signals to tissues via endocytosis and exocytosis of small vesicles. Conveniently, they can be lyophilized for stable storage and transport. This ability to overcome barriers faced by live cell products enables practical bedside use for a variety of applications, and one of those is the treatment of pelvic floor disorders as exosome-based approaches could offer alternatives to surgical reintervention for conditions such as preventing and treating complications of pelvic reconstructive surgery, healing obstetric injury, and curing stress urinary incontinence.

Vaginal Mesh Exposure

While synthetic mesh provides durable support in prolapse and incontinence surgery, complications such as vaginal mesh exposure can necessitate revision. In a preclinical model, our group at Duke University compared surgical closure alone, closure with exosomes, and exosomes alone. Exosome injections regenerated healthy vaginal tissue, covering prior mesh exposures, even without surgical reinforcement^.1,2 When applied preventively at the time of mesh-augmented prolapse repairs, exosomes yielded well-vascularized, rugae-rich mucosa with less fibrosis and no vaginal mesh exposures as compared to controls who had many exposures, suggesting a potential strategy for complication reduction.³

Anal Sphincter Injury

Obstetric anal sphincter injury remains a leading cause of bowel dysfunction and incontinence in women. Histologic and immunohistochemical evidence indicates that exosome treatment can enhance neovascularization, muscle regeneration, and cellular proliferation in sphincter repair models. Our preliminary findings have indicated stronger tissue organization and greater myogenic recovery in treated groups.

Stress Urinary Incontinence

Preclinical studies also have evaluated exosome therapy for stress urinary incontinence, demonstrating both histologic improvement and functional restoration in bladder pressure leak-point testing. While early, these results point to future stand-alone treatment or biologic augmentation of continence surgery.⁴

Looking Ahead

Exosomes are unlikely to be a “complete regenerative solution” for all pelvic floor disorders, but they may become valuable adjuncts when carefully matched to patient pathology. Ongoing and planned studies are exploring broader applications of exosomes and biostimulatory agents in urogynecology, including peri- and post-menopausal applications.

Exosome-based therapy represents an emerging frontier in pelvic reconstructive medicine. With encouraging preclinical results in vaginal, anal sphincter, and bladder applications, further clinical investigation will clarify their role in reducing complications, enhancing surgical outcomes, and potentially offering nonsurgical alternatives. 

1. Kisby CK, Shadrin IY, et al. Exosome-induced vaginal tissue regeneration in a porcine mesh exposure model. Female Pelvic Med Reconstr Surg. 2021;27(10):609-615. doi: 10.1097/SPV.0000000000001005.

2. Kisby CK, Shadrin IY, Peng LT, Stalboerger PG, Trabuco EC, Behfar A, Occhino JA. Impact of Repeat Dosing and Mesh Exposure Chronicity on Exosome-Induced Vaginal Tissue Regeneration in a Porcine Mesh Exposure Model. Female Pelvic Med Reconstr Surg. 2021 Mar 1;27(3):195-201. doi: 10.1097/SPV.0000000000001017. PMID: 33620904.

3. Kisby K, Faraguna S, et al. Exosome injection as a prevention strategy for early postoperative mesh complications in a porcine model of sacrocolpopexy. NPJ Regen Med. In press.

4. Rolland TJ, Peterson TE, et al. Exosome biopotentiated hydrogel restores damaged skeletal muscle in a porcine model of stress urinary incontinence. NPJ Regen Med. 2022;7(1):58. doi: 10.1038/s41536-022-00240-9. Erratum in: NPJ Regen Med. 2022 Oct 31;7(1):65. doi: 10.1038/s41536-022-00260-5.