Fri. Sep 24th, 2021

This picture reveals a Happy New Year card in Japan attached with mouse freeze dried sperm. Credit: Daiyu Ito, University of Yamanashi
Plastic sheets were the finest fit since they were compact and wouldnt break. The sheets were toxic for the sperm, so the team tried and stopped working as they tested numerous products to go inside the plastic sheets.
With the new method of preservation, countless mouse pressures sperm might be saved in a single book, called the “sperm book” by the scientists. The book was kept in a freezer at -30 ° C till additional usage for experiments.
Ito, Wakayama, and group wished to find out if the sperm would still be potent after being mailed tens of miles and, to their delight, it was. The scientists had the ability to mail the mouse sperm from the “sperm book” as postcards by attaching the plastic sheet to the postcard without any protection. One researcher even sent out another a “Happy New Year” card with mouse sperm connected as a present.
The scientists believe that the “sperm book” and mailing approach, once perfected, will have a strong effect in their field worldwide. Their next objective is to be able to store them for a minimum of one month at space temperature. In the future, they likewise want to establish a method that will enable the freeze-dried sperm to come back to life and fertilize on their own when they are rehydrated.
This photo demonstrates how sperm sheets were put in the envelope. The sheet and envelop were posted in the mailbox without any protection. Credit: Daiyu Ito, University of Yamanashi
” It is now acknowledged that hereditary resources are a possession to humanitys future. “The plastic sheet conservation approach in this study will be the most suitable method for the safe preservation of a large quantity of valuable genetic resources since of the resistance to breakage and less area needed for storage.”
This picture reveals mouse offspring derived from freeze-dried sperm grew to adulthood and they demonstrated their normal fertility. Credit: Daiyu Ito, University of Yamanashi
Recommendation: “Mailing viable mouse freeze-dried spermatozoa on postcards” by Daiyu Ito, Sayaka Wakayama, Rina Emura, Masatoshi Ooga and Teruhiko Wakayama, 5 August 2021, iScience.DOI: 10.1016/ j.isci.2021.102815.
This work was partially moneyed by the Naito Foundation, the Asada Science Foundation, the Takeda Science Foundation, and the Research Fellowships of Japan Society for the Promotion of Science for Young Scientists.

This is an image of a mouse produced from sperm mailed by envelope. Credit: Daiyu Ito, University of Yamanashi
Researchers no longer need to worry about their bottles of mouse sperm breaking in transit. Researchers in Japan have established a method to freeze dry sperm on a plastic sheet in weighing paper so that samples can endure being mailed through postcard. This method enables mouse sperm to be transferred easily, inexpensively, and without the threat of glass cases breaking. The paper was released on August 5, 2021, in the journal iScience.
” When I established this method for maintaining mouse sperm by freeze-drying it on a sheet, I thought that it must have the ability to be mailed on a postcard, therefore when offspring were in fact born after being mailed, I was very impressed,” says first author Daiyu Ito of the University of Yamanashi in Japan. “The postcard technique was easier and more affordable compared to any other method. We think the sperm never anticipated that the day would come when they would be in the mail box.”
This photo shows how a sperm sheet of hundred or thousand of mouse stress can be maintain just one card-holder or “sperm book”. Credit: Daiyu Ito, University of Yamanashi
Ito belongs to Teruhiko Wakayamas lab, which had actually formerly been the first string to prosper in freeze-drying and maintaining mammalian sperm, which they sent to the area station to study the effects of area radiation on baby mice. The sperm was originally preserved in a glass ampule, which is a bottle made of glass; although these bottles were small, they were quite large and broke easily, rendering the sperm they brought unusable. The group required large volumes of mouse sperm for their research study in area, but since cushions had actually to be used to prevent breakage during the rocket launch, they might only bring a percentage.

” When I developed this approach for maintaining mouse sperm by freeze-drying it on a sheet, I thought that it needs to be able to be sent by mail on a postcard, and so when offspring were in fact born after being mailed, I was extremely pleased,” says initially author Daiyu Ito of the University of Yamanashi in Japan. Ito is part of Teruhiko Wakayamas lab, which had actually formerly been the very first group to prosper in freeze-drying and maintaining mammalian sperm, which they sent out to the area station to study the impacts of area radiation on child mice. The sperm was initially protected in a glass ampule, which is a bottle made of glass; although these bottles were little, they were rather bulky and broke easily, rendering the sperm they brought unusable. The researchers were able to mail the mouse sperm from the “sperm book” as postcards by attaching the plastic sheet to the postcard with no security. One scientist even sent another a “Happy New Year” card with mouse sperm attached as a present.

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