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Injectable Silk-Based Hydrogel as an Alternative to Cervical Cerclage: A Rabbit Study
Yali Zhang1, Nicole Raia2, Ashley Peterson3
1Tufts Medical Center, Mother Infant Research Institute, Boston, Massachusetts.
Tissue Engineering. Part A
|October 18, 2019
Summary
An injectable silk hydrogel offers a promising alternative to cerclage for preventing preterm birth due to cervical insufficiency. This biocompatible hydrogel augmented cervical tissue without adverse effects on pregnancy outcomes in rabbits.
Area of Science:
- Biomaterials Science
- Reproductive Biology
- Obstetrics
Background:
- Preterm birth is a leading cause of neonatal morbidity and mortality.
- Cervical insufficiency (CI) is a significant risk factor for preterm birth.
- Current treatment, cerclage, has limited efficacy and associated risks.
Purpose of the Study:
- To evaluate an injectable silk-based hydrogel as a potential alternative to cerclage for treating cervical insufficiency.
- To assess the hydrogel's mechanical properties, biocompatibility, and degradation in a pregnant rabbit model.
Main Methods:
- Silk hydrogel was injected into the cervix of pregnant rabbits.
- Controls received saline injection or cerclage (suture).
- Cervical mechanical properties, tissue histology, inflammation markers, and hydrogel degradation were analyzed.
Main Results:
- Hydrogel injection significantly increased cervical cross-sectional area by 46.3%.
- Mechanical properties of hydrogel-injected cervix were comparable to controls.
- The hydrogel showed good biocompatibility with mild inflammation, degraded over 6 weeks, and did not affect delivery timing or pup viability.
Conclusions:
- Injectable silk-based hydrogel is biocompatible and biodegradable for cervical tissue augmentation in vivo.
- This silk hydrogel demonstrates potential as a novel therapeutic alternative to cerclage for preventing preterm birth.
- Further preclinical development could lead to clinical applications for managing cervical insufficiency.
