Hydrogen Nanoparticles Improve Ovarian Transplant Success in Rabbits
- Authors
- Min Jiang, Jun Liu, Yuhong Zhao, Xia Bai, Heqiu Yan, Qin Zeng, Li Wang, Yufan Liao, Dongsheng Xiong, Hong Xie, Zonghui Luan, Ling Yu, Libing He, Zhuoting Zhou, Guohui Zhang, Yang-Bao Miao, Weixin Liu
- Journal
- Journal of Nanobiotechnology
- Year
- 2026
- DOI
- 10.1186/s12951-026-04024-x
- Study Type
- Rabbit
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Infertility
- Body System
- Reproductive System
TL;DR
A hydrogen-releasing hydrogel system reduced oxidative stress, preserved mitochondrial function, and improved graft viability after ovarian tissue transplantation in a preclinical model.
Key Finding
A hydrogen-releasing nanomodulator gel reduced oxidative stress damage and preserved mitochondrial function in transplanted ovarian tissue in rabbits, improving follicle survival and graft viability.
Summary
This study tested a new nanoparticle-based gel designed to release hydrogen gas in ovarian (egg-producing) tissue during transplantation. When ovarian tissue is transplanted, it can suffer damage from temporary loss of blood flow (called ischemia-reperfusion injury), which creates harmful molecules called free radicals and damages the energy-producing structures in cells (mitochondria). In rabbit experiments, the hydrogen-releasing gel reduced this damage by neutralizing free radicals, protecting mitochondria, and improving the survival of egg follicles and overall graft function.
Practical Takeaway
This is early-stage research in animals only, not humans, and focuses on a specialized medical application (ovarian tissue transplantation) rather than hydrogen water consumption. While the results suggest hydrogen may help protect tissue during transplantation procedures, this finding does not directly apply to drinking hydrogen water or other consumer health uses.
Abstract
Ischemia-reperfusion (I/R) injury occurring during ovarian tissue cryopreservation and transplantation (OTC-T) induces mitochondrial dysfunction and oxidative stress, leading to pronounced follicular loss and compromised graft performance-key challenges that limit transplantation success. Here, we present a hydrogen-releasing nanomodulator composed of potassium borohydride nanoparticles embedded within a thermosensitive hydrogel (KBH₄@Gel), designed to achieve sustained in situ hydrogen (H₂) generation for metabolic repair and ovarian function restoration. Upon local administration, the thermosensitive gel undergoes a sol-gel transition, encapsulating KBH₄ nanoparticles and enabling controlled H₂ release under mildly acidic, ischemia-mimicking conditions. Compared with free KBH₄ nanoparticles, KBH₄@Gel exhibits refined release kinetics and extended H₂ bioavailability, thereby providing long-term antioxidative protection. Mechanistic investigations demonstrate that KBH₄@Gel efficiently scavenges reactive oxygen species (ROS), preserves mitochondrial architecture, promotes angiogenesis at the graft site, and enhances ATP synthesis, ultimately reducing primordial follicle apoptosis and improving graft viability. This study introduces a precise and durable nanotherapeutic platform for metabolic repair and functional recovery in ovarian tissue transplantation, offering a broadly translatable strategy to mitigate I/R-induced injury across reproductive and other ischemic tissues.