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Researchers attached iron oxide beads to cattle sperm, guided them with magnets, and produced healthy embryos at normal rates. The approach aims to enable internal IVF using the body as incubator.
New ScientistResearchers attached about 30 iron oxide and polystyrene beads to the head of each cattle sperm cell, allowing the cells to be moved and guided by external magnetic fields while their tails moved freely. The attached beads did not alter swimming speed or overall health of the sperm. The magnetic sperm formed healthy embryos when incubated with eggs in a dish at the same rate as ordinary sperm.
The beads detached as the sperm penetrated the egg and did not interfere with early embryo development. An external magnetic field guided the magnetic sperm in chosen directions and toward eggs in laboratory dishes. The beads are visible on ultrasound, which would permit tracking inside the body.
Mariana Medina-Sánchez at CIC nanoGUNE in Spain led the work. “Our ultimate idea is to do assisted reproduction in vivo, taking advantage of the body as a natural incubator,” she said. ” Dunning noted that further tests are required to show whether magnetic sperm can be directed into fallopian tubes, fertilise eggs, implant in the endometrium, and yield live healthy offspring.
Medina-Sánchez said the beads should be cleared naturally once they fall off, or removed by magnets attached to catheters if needed. Separate unpublished work showed whole embryos placed inside tiny magnetic structures could be guided into mouse fallopian tubes with external magnets. 720095.
Usa TodayThe National Park Service treated green water in the Lincoln Memorial Reflecting Pool with hydrogen peroxide on Tuesday. The treatment followed a renovation completed ahead of the United States Semiquincentennial.
NewsweekA tropical storm watch covers coastal areas from Sargent, Texas, to Fort Morgan, Louisiana. The system, labeled Potential Tropical Cyclone One, is forecast to become Tropical Storm Arthur and move inland by late Wednesday or early Thursday.
deccanchronicle.comSpaceX acquired Cursor on its second day of public trading after shares rose more than 19 percent each of the first two sessions.