In vitro development of zygotes from prepubertal gilts after microinjection of DNA
| Autor: | B. L. Williams, A.E.T. Sparks, R. S. Canseco, J. W. Knight, J. L. Johnson, W. H. Velander, R. L. Page, W. N. Drohan, J. M. Young, R. E. Pearson, T. D. Wilkins, F. C. Gwazdauskas |
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| Rok vydání: | 1992 |
| Předmět: |
Microinjections
Swine Zygote media_common.quotation_subject Bicarbonate Biology Cleavage (embryo) Andrology Mice chemistry.chemical_compound Ovulation Induction Culture Techniques Genetics Animals Sexual Maturation Ovulation Microinjection Cells Cultured Fallopian Tubes media_common DNA General Medicine In vitro Culture Media chemistry Female Animal Science and Zoology Food Science Explant culture |
| Zdroj: | Journal of Animal Science. 70:2207-2211 |
| ISSN: | 1525-3163 0021-8812 |
| Popis: | The effect of pronuclear microinjection of DNA and culture in excised mouse oviducts on the development of porcine zygotes was assessed in this study. Precocious ovulation was induced in prepubertal gilts with pregnant mare's serum gonadotrophin and hCG. Zygotes received either pronuclear microinjection of buffer alone, buffer containing a DNA construct, or no microinjection. Zygotes were cultured in vitro in either modified Krebs-Ringer bicarbonate medium (KRB) for 144 h or in mouse oviduct (MO) explant culture with KRB for 48, 72, 96, or 120 h. Pronuclear microinjection of DNA resulted in a lower (P less than .05) cleavage index (CI) than did buffer or no microinjection (CI 2.16 +/- .10 vs 2.80 +/- .13 and 2.93 +/- .10). The CI loss was greatest for DNA-injected zygotes at the two-cell stage of development. Coculture of zygotes in MO resulted in a higher CI (P less than .01) than did culture in KRB. Culture in MO for 72 h was the most beneficial system compared with MO for 48, 96, or 120 h (P less than .05; CI 3.25 +/- .12 vs 2.66 +/- .18, 2.79 +/- .14, and 2.40 +/- .14, respectively). Microinjection of DNA, not merely the mechanical procedure, was detrimental to early zygote development and may be the cause of low pregnancy rates. |
| Databáze: | OpenAIRE |
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