Japan develops sperm freeze drying preservation method
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Last Update: 2020-07-06
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Source: Internet
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Author: User
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a team in Japan,, has recently successfully developed a sperm freezing dry ingans that can freeze and dry sperm and return it to normal when usedThe study is published in the new issue of the British Journal of Reproductive Medicine, Human ReproductionCurrently, liquid nitrogen is commonly used to preserve sperm in infertility treatments and rare wildlife conservations, but the preserved sperm is at risk of damage due to external factors such as power outages, the team said in a press releaseThe new method makes it easier to preserve sperm and reduces the associated risksThe research team was led by Professor Yukio Uchiguchi of Asahikawa Medical University in Japan and Professor Yusuke Yuen of the University of Hawaii in the United StatesIn the experiment, the researchers immersed human sperm in a special solution of 37 degrees Celsius for 10 minutes, then quickly frozen liquid nitrogen and dried it in a vacuum, then kept the processed sperm in a 4-degree Celsius incubator for one monthAfter that, the researchers took out the dried sperm and put it in water to restore it, and looked at the sperm's chromosomal status, resulting in 80 to 90 percent of the sperm being normal, no different from the natural state of the spermIn the mouse experiment, the researchers had used the frozen, dry and then returned to normal state of sperm to make the mother mouse pregnant normallyThis confirms that this preservation method allows sperm to retain normal genetic information
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