Cryopreservation time does not decrease follicular viability in ovarian tissue frozen for fertility preservation
Clinics
;
66(12): 2093-2097, 2011. ilus
Artigo
em Inglês
| LILACS
| ID: lil-609007
ABSTRACT
OBJECTIVE: To determine the effect of storage duration on cryopreserved ovarian tissue using fresh and frozenthawed samples. METHODS: Seventeen fertile patients underwent an ovarian biopsy during elective laparoscopic tubal ligation. The tissue sample was divided into three parts: one part was processed fresh (FG), and two were slowly frozen, cryopreserved for 30 (G30) or 180 days (G180), thawed and analyzed. Follicular density, follicular viability, and steroidogenic capacity were assessed. RESULTS: We observed no differences between the groups in follicular density, which was assessed in hematoxylin and eosin-stained tissue sections. A heterogeneous follicular distribution was observed in the parenchyma, with a mean density of 361.3±255.4, 454.9±676.3, and 296.8±269.0 follicles/mm3 for FG, G30 and G180, respectively (p = 0.46). Follicular viability was greater in FG (93.4 percent) when compared with the cryopreserved tissues (70.8 percent for G30 (p<0.001) and 78.4 percent for G180 (p<0.001)), with no difference in viability between the frozen samples (p>0.05). The steroidogenic capacity of the tissue was not significantly reduced following cryopreservation. CONCLUSION: The slow freezing procedures used for ovarian cryopreservation are capable of preserving follicular viability and maintaining the steroidogenic capacity of the tissue despite a roughly 30 percent decrease in follicular viability. Furthermore, short-term storage of ovarian tissue does not appear to compromise follicle integrity.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Criopreservação
/
Preservação da Fertilidade
/
Folículo Ovariano
Tipo de estudo:
Estudo observacional
Limite:
Adulto
/
Feminino
/
Humanos
Idioma:
Inglês
Revista:
Clinics
Assunto da revista:
Medicina
Ano de publicação:
2011
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade de São Paulo/BR
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