Biodegradable Scaffolds and Suture Patches to Heal Lower Urinary Tract Issues

Renowned researcher Renea M. Sturm, MD, FAAP, has led the development of innovative biomaterials, including biodegradable scaffolds and suture patches, to alleviate challenges in repairing and replacing lower urinary tract (LUT) tissues. In collaboration with Nasim Annabi, PhD, the team has created materials that mimic the natural viscoelasticity of the urinary bladder and urethra. These breakthroughs promise to revolutionize the field of urology, offering a more effective and minimally invasive approach to addressing complex LUT conditions.

Key Takeaways:

• The newly developed biomimetic scaffolds are made of a fibrous mat comprised of two naturally derived polymers, gelatin, and elastin-like peptide, which provide biologic and structural cues for tissue regeneration as they degrade over time.
• The scaffolds are not only elastic and biodegradable but also promote healing and reduce complications, unlike existing materials used for LUT procedures.
• The developed patch, called BLAP, is a tensile-matched patch with a functionalized adhesive surface that binds with tissues similarly to how mussels adhere in moist environments.
• The patch offers a groundbreaking solution to the limitations of current suture reinforcement materials, which cannot expand or contract with the urinary cycle, leading to tissue failure and complications.
• The biomaterials have been extensively characterized and evaluated in vitro using human LUT cell lines and in animal models, demonstrating biocompatibility and potential for clinical use.
• The next steps in developing these materials include adding specific proteins to be released from the scaffold layer to support microenvironments for tissue regeneration.
• Dr. Sturm's work is focused on addressing the unique challenges of the lower urinary tract, including congenital conditions like hypospadias, neurogenic bladder, and bladder malignancy or exstrophy.

Statistics:

• The scaffolds have been subjected to extensive characterization to determine precise formulations that most closely resemble urinary tract target tissues.
• The materials have been evaluated in vitro using human LUT cell lines and in animal models to assess biocompatibility and degradation.
• The developed patch, BLAP, has been shown to bind with tissues similarly to how mussels adhere in moist environments.
• Children who undergo LUT procedures have a high risk of early and late complications, including tissue failure and infections.

Sources:

• UCLA Health System, "Biodegradable scaffolds and suture patches mimic LUT mechanics, promoting healing and reducing complications"
• University of California, Los Angeles, David Geffen School of Medicine
• Nasim Annabi, PhD, Associate Professor of Chemical and Biomolecular Engineering at UCLA
• Renea M. Sturm, MD, FAAP, Assistant Professor of Urology at the David Geffen School of Medicine at UCLA