A leech capable of surviving exposure to extremely low temperatures.

It is widely considered that most organisms cannot survive prolonged exposure to temperatures below 0°C, primarily because of the damage caused by the water in cells as it freezes. However, some organisms are capable of surviving extreme variations in environmental conditions. In the case of tempera...

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Autores principales:	Dai Suzuki, Tomoko Miyamoto, Takahiro Kikawada, Manabu Watanabe, Toru Suzuki
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3962f02cde264949a916eacb015a6937
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spelling	oai:doaj.org-article:3962f02cde264949a916eacb015a69372021-11-18T08:36:20ZA leech capable of surviving exposure to extremely low temperatures.1932-620310.1371/journal.pone.0086807https://doaj.org/article/3962f02cde264949a916eacb015a69372014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24466250/?tool=EBIhttps://doaj.org/toc/1932-6203It is widely considered that most organisms cannot survive prolonged exposure to temperatures below 0°C, primarily because of the damage caused by the water in cells as it freezes. However, some organisms are capable of surviving extreme variations in environmental conditions. In the case of temperature, the ability to survive subzero temperatures is referred to as cryobiosis. We show that the ozobranchid leech, Ozobranchus jantseanus, a parasite of freshwater turtles, has a surprisingly high tolerance to freezing and thawing. This finding is particularly interesting because the leach can survive these temperatures without any acclimation period or pretreatment. Specifically, the leech survived exposure to super-low temperatures by storage in liquid nitrogen (-196°C) for 24 hours, as well as long-term storage at temperatures as low as -90°C for up to 32 months. The leech was also capable of enduring repeated freeze-thaw cycles in the temperature range 20°C to -100°C and then back to 20°C. The results demonstrated that the novel cryotolerance mechanisms employed by O. jantseanus enable the leech to withstand a wider range of temperatures than those reported previously for cryobiotic organisms. We anticipate that the mechanism for the observed tolerance to freezing and thawing in O. jantseanus will prove useful for future studies of cryopreservation.Dai SuzukiTomoko MiyamotoTakahiro KikawadaManabu WatanabeToru SuzukiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 1, p e86807 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dai Suzuki Tomoko Miyamoto Takahiro Kikawada Manabu Watanabe Toru Suzuki A leech capable of surviving exposure to extremely low temperatures.
description	It is widely considered that most organisms cannot survive prolonged exposure to temperatures below 0°C, primarily because of the damage caused by the water in cells as it freezes. However, some organisms are capable of surviving extreme variations in environmental conditions. In the case of temperature, the ability to survive subzero temperatures is referred to as cryobiosis. We show that the ozobranchid leech, Ozobranchus jantseanus, a parasite of freshwater turtles, has a surprisingly high tolerance to freezing and thawing. This finding is particularly interesting because the leach can survive these temperatures without any acclimation period or pretreatment. Specifically, the leech survived exposure to super-low temperatures by storage in liquid nitrogen (-196°C) for 24 hours, as well as long-term storage at temperatures as low as -90°C for up to 32 months. The leech was also capable of enduring repeated freeze-thaw cycles in the temperature range 20°C to -100°C and then back to 20°C. The results demonstrated that the novel cryotolerance mechanisms employed by O. jantseanus enable the leech to withstand a wider range of temperatures than those reported previously for cryobiotic organisms. We anticipate that the mechanism for the observed tolerance to freezing and thawing in O. jantseanus will prove useful for future studies of cryopreservation.
format	article
author	Dai Suzuki Tomoko Miyamoto Takahiro Kikawada Manabu Watanabe Toru Suzuki
author_facet	Dai Suzuki Tomoko Miyamoto Takahiro Kikawada Manabu Watanabe Toru Suzuki
author_sort	Dai Suzuki
title	A leech capable of surviving exposure to extremely low temperatures.
title_short	A leech capable of surviving exposure to extremely low temperatures.
title_full	A leech capable of surviving exposure to extremely low temperatures.
title_fullStr	A leech capable of surviving exposure to extremely low temperatures.
title_full_unstemmed	A leech capable of surviving exposure to extremely low temperatures.
title_sort	leech capable of surviving exposure to extremely low temperatures.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/3962f02cde264949a916eacb015a6937
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A leech capable of surviving exposure to extremely low temperatures.

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