Data/hora: 19/06/2024 05:53:36

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	15/12/2014	
Data da última atualização: 	15/12/2014	
Autoria: 	CUNHA, E. R. da; MARTINS, C. F.; SILVA, G. C.; CUMPA, H. C. B.; BAO, S. N.	
Afiliação: 	CARLOS FREDERICO MARTINS, CPAC; HEIDI CHRISTINA BESSLER CUMPA, CPAC.	
Título: 	Effects of prolonged in vitro culture and cryopreservation on viability, DNA Fragmentation, chromosome stability and ultrastructure of bovine cells from amniotic fluid and umbilical cord.	
Ano de publicação: 	2014	
Fonte/Imprenta: 	Reproduction in Domestic Animals, v. 49, n. 5, p. 806-812, Oct. 2014.	
ISSN: 	0936-6768	
DOI: 	10.1111/rda.12372	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to study cellular types that did not participated in the gastrulation process, amniotic fluid cells (AFCs) and umbilical cord cells (UCCs), in conditions of long-term culture and cryopreserved with different solutions. The AFCs and UCCs were used in a comparative study with ear fibroblast cells (EFCs) that were cultured in vitro until 20 cellular passages and cryopreserved in 10% dimethylsulphoxide (DMSO), 5% dimethyl formamide (DMF) and 7% glycerol (Gly) solutions. The cellular viability, ultrastructure, DNA fragmentation and chromosome stability were evaluated to determine the cellular type most resistant. In all cell types, it was possible to evaluate the AFCs until 15 passages and UCCs until 20 passages with different periods of cellular growth to reach the confluence phase. Solutions containing 10% DMSO ensured viability of 90.33 ± 5.58%, 90.56 ± 4.40% and 81.90 ± 3.31%, respectively for EFCs, AFCs and UCCs, being significantly more efficient and with less variation than other cryoprotectant solutions. The AFCs were more sensitive to cryopreservation and presented low viability rate at the passage 20 (17.2 ± 8.87%). There was no change in karyotype and nuclear fragmentation was low in all cellular passages studied. With the scanning electron analysis was possible the characterization of AFCs and UCCs in suspension. The three cellular types of cells presented different shapes and characteristics on the surface. The results demonstrate that bovine AFCs and UCCs can be isolated, cultured in vitro and cryopreserved in 10% DMSO, not causing damage to DNA and chromosomes. The UCCs were more resistant than AFCs in all aspects.	
Palavras-Chave: 	Cordão umbilical; Líquido aminiótico.	
Thesagro: 	Bovino; Criopreservação; Melhoramento genético animal.	
Thesaurus Nal: 	Amniotic fluid; Cattle; Cryopreservation; Genetic improvement; Umbilical cord.	
Categoria do assunto: 	G Melhoramento Genético	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (34257-1) - UPC - AP - PP - S1816 -  - S1816 - DIS