Follicle survival and growth to antral stages in short-term murine ovarian cortical transplants after Cryologic solid surface vitrification or slow-rate freezing

Cryobiology
Jan M J AertsPeter E J Bols

Abstract

This study was designed to asses murine preantral follicle survival and growth, after cryopreservation of ovarian tissue by two different methodologies, solid-surface vitrification by the Cryologic vitrification method (CVM) and slow-rate freezing (SRF). Cryotreated tissue was stored in liquid nitrogen for 24h, and upon warming follicle viability was assessed by live/dead fluorescent probes, and by 7-day autotransplantation of both cryotreated tissue types to the left and right kidney capsule of the donor animals (n=16). The live/dead assay immediately upon tissue warming did not allow a distinction to be made in terms of follicle viability between the CVM and SRF cryoprocedure. In grafted tissue, follicular survival and growth was assessed by conventional histological examination and proliferating cell nuclear antigen immunohistochemistry. In each experimental group (control, CVM and SRF), follicles were classified according to developmental stage, and a comparison of the proportions of follicle stages between the three groups was executed by statistical analysis of variance. The fraction of primordial follicles in CVM and SRF grafts significantly decreased as compared to control tissue, whereas intermediary and primary follic...Continue Reading

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