Effect of arachidonic acid supplementation and cyclooxygenase/lipoxygenase inhibition on the development of early bovine embryos

Revista Brasileira de Zootecnia

Rosa Maria Pereira¹  Carla Cruz Marques¹  Maria Da Conceição Baptista¹  Maria Irene Vasques¹  António Eduardo Horta¹ 

[1] ,Estação Zootécnica Nacional

关键词: arachidonic acid;    bovine embryos;    granulosa;    in vitro;    ácido araquidónico;    embriões bovinos;    granulosa;    in vitro;   

DOI  :  10.1590/S1516-35982006000200012

来源: SciELO

【 摘 要 】

The effect of arachidonic acid (AA) cascade on bovine embryo development in a granulosa cell co-culture system was studied. Arachidonic acid (100 µM) was supplemented from 1-cell to 8-16 cell block stage (first three days of co-culture) and from 1-cell to hatching. Specific cyclooxygenase (indomethacin, 28 µM) and lipoxygenase (nordihydroguaiaretic acid - NDGA, 28 µM) inhibitors were used from 1-cell to 8-16 cell block stage with AA. Embryo development was assessed by cleavage, day 7-day 8 and hatched embryo rates and by measuring growth rates through development stages found in days 7-10 of culture (day 0 = insemination day). Embryo quality was scored at day 8. A 6.5-10.4% increase on cleavage rate after AA supplementation was found. This AA supplementation from 1-cell to hatching delayed embryo growth rate beyond day 7 and a reduction on hatching rate was detected. When AA supplementation was restricted to the first three days of co-culture those negative effects were overcome. Also, indomethacin and NDGA prevented the positive effect of AA and induced a significant reduction on cleavage, respectively. NDGA further decreased day 7 embryo rate and quality. Results suggest that AA has a two-phase action on bovine embryos, promoting early development and impairing embryo growth from day 7 onwards and hatching rates. Both cyclooxygenase and lipoxygenase were found to be important pathways to promote cleavage.

【 授权许可】

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