alexa Transplantation of cryopreserved human ovarian tissue results in follicle growth initiation in SCID mice.
Reproductive Medicine

Reproductive Medicine

Journal of Fertilization: In Vitro - IVF-Worldwide, Reproductive Medicine, Genetics & Stem Cell Biology

Author(s): Oktay K, Newton H, Gosden RG

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Abstract OBJECTIVE: To determine the long-term survival of frozen-thawed human ovarian tissue as xenografts in severe-combined-immunodeficiency (SCID) mice. DESIGN: Animal study. SETTING: Animal and laboratory facilities at an academic center. PATIENT(S): Ovarian tissue obtained from a 27-year-old woman. INTERVENTION(S): Grafting of frozen-thawed ovarian tissue in SCID mice for 22 weeks. MAIN OUTCOME MEASURE(S): Follicle counts and growth by morphology and PCNA staining in frozen-thawed grafts and fresh controls. RESULT(S): All three grafts were recovered intact after 22 weeks. Their stroma was devoid of necrotic cells and contained healthy follicles. The ratio of primordial-total follicles decreased significantly after grafting (0.94 +/- 0.02 to 0.87 +/- 0. 01, control vs. grafting). Compared with controls, after 22 weeks of grafting, a higher percentage of follicles had initiated growth (5.6 +/- 2.4 vs. 12.5 +/- 1.9), but there was still a significant number of primordial follicles/graft (75 +/- 6.8). Follicle stages were similar between two groups; only primordial and one-layer follicles were seen in the xenografts. In the controls, except for one two-layer follicle, the most advanced follicle was at the one-layer stage. CONCLUSION(S): Human primordial follicles survive freeze-thaw and long-term xenografting procedures and retain their capacity to initiate growth. These findings encourage future attempts for human autologous ovarian transplantation.
This article was published in Fertil Steril and referenced in Journal of Fertilization: In Vitro - IVF-Worldwide, Reproductive Medicine, Genetics & Stem Cell Biology

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