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Updated: Feb 11, 2026

Application of a Novel Hyaluronan Hydrogel for Three-Dimensional Follicle Culture and Methodology for Mouse Ovarian Follicle Cryopreservation
Published on: May 9, 2025
Three-Dimensional Hydrogel-Based Culture to Study the Effects of Toxicants on Ovarian Follicles
Hong Zhou1, Ariella Shikanov2,3
1Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA.
Abstract:
Various toxicants, such as drugs and their metabolites, can cause potential ovarian toxicity. As the functional units of the ovary, ovarian follicles are susceptible to this type of damage at all developmental stages. Studying the effects of toxicants on ovarian follicles is an important task. Three-dimensional (3D) hydrogels, such as fibrin alginate interpenetrating networks (FA-IPNs), can support ovarian follicle culture in vitro for extended periods of time and serve as a suitable tool for studying ovotoxicity. Growing follicles encapsulated in the FA-IPN can proteolytically degrade the fibrin component in the FA-IPN. The degradation of fibrin mirrors the follicle growth and serves as a surrogate reporter for follicle health. The speed of fibrin degradation can be further controlled by aprotinin, a small molecule that inhibits plasmin-driven proteolytic degradation, which further expands the application of the described system. In this chapter, we describe methods to (1) isolate and encapsulate mouse ovarian follicles in FA-IPN, (2) follow follicle growth and development in vitro, and (3) evaluate the effects of toxicants on folliculogenesis using fibrin degradation.
Insights
This study introduces a novel 3D hydrogel system for culturing ovarian follicles. This fibrin alginate interpenetrating network (FA-IPN) system allows researchers to monitor follicle health by tracking fibrin degradation, aiding ovotoxicity studies.
Area of Science:
- Reproductive biology
- Toxicology
- Biomaterials science
Background:
- Ovarian toxicity from toxicants poses a risk to reproductive health.
- Ovarian follicles are sensitive to toxicant-induced damage.
- In vitro models are needed to study ovotoxicity and follicle development.
Purpose of the Study:
- To describe a 3D hydrogel system for in vitro ovarian follicle culture.
- To establish a method for evaluating ovotoxicity using follicle health indicators.
- To demonstrate the utility of fibrin degradation as a reporter for follicle health.
Main Methods:
- Isolation and encapsulation of mouse ovarian follicles within fibrin alginate interpenetrating networks (FA-IPNs).
- In vitro culture of encapsulated follicles to monitor growth and development.
- Utilizing the proteolytic degradation of the fibrin component within the hydrogel as a quantitative measure of follicle health and response to toxicants.
- Modulating fibrin degradation rates using aprotinin to control the reporter system.
Main Results:
- FA-IPNs successfully support the in vitro culture of ovarian follicles.
- Fibrin degradation within the FA-IPN serves as a reliable indicator of follicle growth and health.
- The system allows for the evaluation of toxicant effects on folliculogenesis.
- Aprotinin can be used to modulate the rate of fibrin degradation, enhancing system control.
Conclusions:
- The described FA-IPN system provides a robust platform for studying ovarian follicle development and ovotoxicity in vitro.
- Fibrin degradation is a valuable surrogate marker for assessing follicle health and toxicant impact.
- This 3D culture model offers a promising tool for reproductive toxicology research.
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