Fri 25 Jul 2008
Erythrocyte supplementation improves embryo development in aging females
Posted by spainfertility under NewsNo Comments
Determining the impact of erythrocyte supplementation on embryo development in young mice exposed to an oxidizing agent and in aging female mice.
MedWire News: The negative effect of maternal aging on embryo development and blastocyst formation can be counteracted by supplementation with erythrocytes, Japanese study results indicate.
Believing that the low developmental competence of embryos from aging females may be due to oxidative stress, Rie Fukuhara and colleagues from Hirosaki University School of Medicine cultured IVF embryos from young mice in medium supplemented with the oxidizing agent hypoxanthine/xanthine oxidase in the presence or absence of erythrocytes.
In a second experiment, the team assessed the development of embryos from young and aging female mice in the presence and absence of erythrocytes.
Hypoxanthine/xanthine oxidase significantly inhibited embryo development. In contrast, erythrocyte supplementation increased embryo development in a dose-dependent manner, from zero blastocyst embryos in mice exposed to hypoxanthine/xanthine oxidase alone to 10.1 percent of blastocysts supplemented with the highest dose of erythrocytes.
Developmental competence was significantly lower in embryos from aging females than those from young females. However, erythrocyte supplementation significantly increased the development of embryos to the blastocyst stage, from 51.1 to 77.3 percent.
The team says: “Increasing numbers of women are delaying childbearing until the end of the third and sometimes the fourth decade of life, and therefore there is a strong need for the clinical application of this technique.”
ORGYN.com