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A Chinese research team developed a nano-material that can find sars-CoV-2 viruses in a living cell and remove them

A Chinese research team developed a nano-material that can find sars-CoV-2 viruses in a living cell and remove them

September 14, 2022
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A Chinese research team developed a nano-material that can find sars-CoV-2 viruses in a living cell and remove them

Yosam Mukundane by Yosam Mukundane
September 14, 2022
in Technology
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A Chinese research team developed a nano-material that can find sars-CoV-2 viruses in a living cell and remove them

A Chinese research team developed a nano-material that can find sars-CoV-2 viruses in a living cell and remove them. GETTY IMAGE

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A Chinese research team has developed a nanomaterial that can find Sars-CoV-2 viruses in a living cell and remove them.

Unlike most existing Covid-19 drugs, the material can inhibit infections from all major variants including Alpha, Beta, Delta and Omicron with high biosafety, the researchers said.

“It can be a promising therapy to fight pandemics in the future,” said a researcher involved in the study who asked not to be named.

Researchers from the Shenzhen Institute of Advanced Technology, National Centre for Nanoscience and Technology, Institute of High Energy Physics, and the Kunming Institute of Zoology – all under the Chinese Academy of Sciences – contributed to the work.

Nanomaterials are extremely small – a single nanometre is one billionth of a metre. The structure of the material – called CIPS because it is made of copper, indium, phosphorus and sulphur – takes the form of nanosheets that are about 200 nanometres, around the size of two viral particles.

Normally, the sars-CoV-2virus invades human cells with help of the spike protein on its surface. The spike protein binds with the ACE2 protein on the surface of the human cell in the same way a key opens a lock, thus allowing the virus to invade the host cell.

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CIPS, however, is capable of selectively binding with the virus’ spike protein, resulting in the infection process being blocked.

“It serves as a trap for the virus,” the National Centre for Nanoscience and Technology said on its website.

Once CIPS has captured the virus, it forms a stable complex. The complex is then recognised and eliminated by the host’s macrophages, large white blood cells in the human immune system that digest foreign substances.

“Experiments show that CIPS effectively inhibits infection in cells, organoids and mice, and effectively relieves lung inflammation in mice caused by Sars-CoV-2 infection,” the paper said.

The effectiveness of current vaccines and antibodies being used against Sars-CoV-2 declines against variants like Omicron. While most antibodies are designed to bind with one single location on the virus, the mutation in Omicron variants may change the structure of the surface. CIPS can bind to multiple sites at the same time.

More than 1,000 new coronavirus mutant strains have been discovered so far. Though the Chinese team cannot test CIPS materials on all strains, they found CIPS were highly effective against all variants of concern – Alpha, Beta, Delta and Omicron.

Good biocompatibility is a prerequisite for the safe application of nanomaterial. Researchers studied the absorption, distribution, metabolism and excretion process of CIPS in mice and found the material had high biodegradability.

“Mice inhale CIPS through nasal drop and after seven days, it shows almost entire elimination of CIPS from the lung of mice,” the study said.

The biodegradability and biosafety of CIPS nanomaterials indicate it has good potential and application value, but it must still be tested through a series of clinical trials before it can be it ready for use in humans, the unnamed researcher said.

“The safety assessment of anti-covid-19 drugs includes a test for toxicity to the organ and immune system, a test for toxicity that causes deformities, and a test for allergies. The process is long and expensive, usually done by pharmaceutical companies,” they added.

The good news is that the nanomaterials could be relatively cheap enough for mass production and widespread applications.

“The nanomaterial could be used as a decontamination agent or surface-coating material to reduce Sars-CoV-2 infectivity,” said the researcher.

Source: SCMP.

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Yosam Mukundane

Yosam Mukundane

I'm a senior member at Forsige covering topics on diplomacy and foreign policy relating to Asia and the World.

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