June 25, 2021

Rotifer has risen after 24,000 years in the Siberian Permafrost

Revived Rotifer.

Revived Rotifer.
Picture: Michael Flewka

There is a separate rotifer I woke up after spending the last 24,000 years in frozen sleep. Scientists hope that further study of this biodiversity will lead to better ways to do cryopreservation of human cells, tissues and organs.

Rotifers are worm-like aquatic animals that prefer freshwater environments and moist soil. These complex creatures are not exotic tardigrades, Another micro-animal, but they are also known for their extreme survival capabilities as they are able to withstand dehydration, freezing temperatures, starvation and low oxygen levels. By the renewal of the 24,000 year old rotifer discovered In the Siberian permafrost, scientists have proven that these creatures are more severe than previously thought. New Findings Published today in Current Biology.

“Today’s report is the hardest evidence that biodiversity can withstand thousands of years in cryptopiosis, a state of complete capture metabolism,” he said. Stas Malavin, co-author of the study, In a press release. Of Malawi Biologist in the Soil Geology Laboratory at the Institute of Physical Chemistry and Biological Problems in Soil Science in Pushkin, Russia.

A closer look at the updated Rotifer.

A closer look at the updated Rotifer.
Picture: Michael Flewka

Impressive achievement for a microbe, But a record does not have it. Back in 2018, Russian scientists Claim claimed Resurrect nematode worms pulled from permanent ice deposits dated at least 32,000 years ago. Previous Rotifer recovery Posts From six to 10 years, include specimens found in Antarctic soils and glaciers. Dartigrade Registration 30 years, but according to their track recordings, I doubt they can endure a long period of frozen sleep.

Credit for the new invention goes to Russia’s Soil Cryobiology Laboratory, which uses drills to excavate specimens from Siberian permafrost. The resurrected Rotiffer was found near the Alaska River in northeastern Siberia At a depth of 11.5 feet (3.5 m). The team used special extraction methods to prevent contamination in neighboring layers, while also rejecting natural water from the above layers. The late Pleistocene layer containing the Rotifer model was radiocarbon-dated about 24,000 years ago, about 12,500 years before the end of the most recent ice age.

Revived rotifer while feeding.
Gif: Lyubov Shmakova

Back in the lab, scientists were able to update the rotisserie It also develops several secondary rotifer cultures from the same individual (rotifers reproduce abnormally in a process called parthenogenesis). The study says the reported revival “is the longest survival of the rotifer in the frozen state”. Genetic analysis of the sample identified that it belonged to the species Adenetta, Which is compared to life samples obtained from Belgium.

To learn more about rotifers and how they can pull this trick, the team selected approximately 144 unrelated rotifer models and frozen at 5 பார F (-15 சி C) for a week. This test, though limited in range, showed that it was ancient Adenetta As scientists wrote in their study, “there is no greater tolerance than contemporary organisms”.

System of subsequent frost testing.

System of subsequent frost testing.
Picture: Stas Malavin

“Neglect is the fact that a biodiversity creature can be frozen and stored for thousands of years and then come back to life — this is the dream of many fiction writers,” Malvin said. “Of course, the more complex the organism, the trickier it is to keep it alive in the freeze, which is currently not possible for mammals. Nevertheless, the transition from a single-celled organism to an organism with a gut and a brain, albeit a small one, is a big step. ”

Somehow, Adenetta Rotifers are able to fight the formation of ice crystals — the deadly enemy of the freezing process. Ice crystals are like small blades that destroy the integrity of cells and organs. The study suggests that rotifers may have some sort of “biochemical mechanism of the organ and cell shell needed to maintain a low temperature.” A good understanding of this rotifer defense mechanism can go a long way in developing cryopreservation techniques for storing cells, organs and tissues at cool temperatures.

More speculatively, these insights may advance the new field Cryonics, In which dead humans are stored at liquid nitrogen temperature. The renaissance of these people frozen Never happens, but reversible cycles, at the very least, give us hope.

Further: Frozen Dortigrade was revived 30 years later.