Extracellular matrix improves survival of both stored and fresh human primordial and primary ovarian follicles in long-term culture

Human Reproduction
Outi HovattaR M Winston

Abstract

Ovarian cortical tissue was obtained during gynaecological operations by biopsy or after oophorectomy from 20 women aged 25-42 years. It was placed in organ culture, either fresh or following thawing after cryopreservation, for 1-4 months. The tissue was cut in slices 0.1-0.3 mm in diameter and transferred to 12 mm inserts in 24-well culture plates. These slices were cultured for 4-21 days in either alpha minimum essential medium (alpha-MEM) or Earle's balanced salt solution with added pyruvate. Both media were supplemented with 10% human serum, insulin, gonadotrophins and antibiotics. Half of the inserts were precoated with extracellular matrix (Matrigel). Histological samples revealed that there were viable, non-atretic, primordial, primary and secondary follicles in all the cultures. Mitoses were seen in the granulosa cells of the secondary follicles. Although the proportion of atretic follicles increased during culture, non-atretic follicles were still present after 21 days. After 4-11 days the proportion of viable follicles was significantly higher when cultured in Earle's solution supplemented with pyruvate, than when cultured in MEM (77 versus 38%, P < 0.001). In cultures with extracellular matrix the proportion of viabl...Continue Reading

Citations

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