Friday May 24, 2019

New Finding! Scientists Have Developed Robotic Tool To Detect And Kill Cancer Cells in Humans

The researchers used their robotic system to study early-stage and later-stage bladder cancer cells. Previously, they had to extract the cell nuclei to examine it.

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The study, published in the journal Science Robotics, described the design in which a magnetic iron bead about 100 times smaller than the thickness of a human hair can be coaxed into any desired position within the cell, the Xinhua reported. Pixabay

Canadian scientists have developed a kind of magnetic tweezer that can precisely insert a minuscule bead robot into a live human cancer cell, pointing to a new option for diagnosing and killing cancer.

The study, published in the journal Science Robotics, described the design in which a magnetic iron bead about 100 times smaller than the thickness of a human hair can be coaxed into any desired position within the cell, the Xinhua reported.

The bead, about 700 nanometres in diameter, is placed on the microscope coverslip surrounded by six magnetic coils in different planes, and the cancer cell can swallow the bead into its membrane.

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They were able to measure how much stiffer the nucleus got when prodded repeatedly, and thus find out which cell protein or proteins might play a role in controlling this response, which could work as a new method of detecting cancer in early stage. Pixabay

Then, the researchers from University of Toronto controlled the bead’s position under a microscope, using a computer-controlled algorithm to vary the electrical current through coils and shaping the magnetic field in three dimensions.

The researchers used their robotic system to study early-stage and later-stage bladder cancer cells. Previously, they had to extract the cell nuclei to examine it.

The team measured cell nuclei in intact cells instead of breaking apart the cell membrane, showing that the nucleus is not equally stiff in all directions.

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In the later-stage cells, the stiffening response is not as strong as they are in the early stage, though both are seemingly similar, the researchers said. VOA

“It’s a bit like a football in shape. Mechanically, it’s stiffer along one axis than the other,” said Professor Sun Yu.

“We wouldn’t have known that without this new technique.”

They were able to measure how much stiffer the nucleus got when prodded repeatedly, and thus find out which cell protein or proteins might play a role in controlling this response, which could work as a new method of detecting cancer in early stage.

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In the later-stage cells, the stiffening response is not as strong as they are in the early stage, though both are seemingly similar, the researchers said.

Also, the team visualised using the tiny robots to either starve a tumour by blocking its blood vessels, or destroy it directly through mechanical ablation, although those applications are still a long way from clinical uses. (IANS)

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Jury Grants $2 Billion to Couple Claiming ‘Glysophate’ in Roundup Weed Killer Caused Cancer

Vietnam said it would stop importing Roundup and other weed killers with the ingredient

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FILE - Containers of Roundup are displayed on a store shelf in San Francisco, Feb. 24, 2019. VOA

For the third time in less than a year, a jury has ruled the main ingredient in a popular weed killer caused cancer in its users. A San Francisco jury Monday awarded more than $2 billion to a couple in their 70s who say glyphosate in Roundup weed killer gave them non-Hodgkin lymphoma.

The couple say they used Roundup for 35 years. Attorneys for the couple say numerous scientific studies show glyphosate led to cancer in both animal and human populations.

The World Health Organization has classified glyphosate as “probably carcinogenic to humans” and last month, Vietnam said it would stop importing Roundup and other weed killers with the ingredient.

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The World Health Organization has classified glyphosate as “probably carcinogenic to humans”. Pixabay

Bayer, Roundup’s manufacturer, argued that hundreds of other scientific tests show glyphosate is safe and that the U.S. Environmental Protection Agency determined that when used as directed, glyphosate is not dangerous.

ALSO READ: ‘Canine Brucellosis’- A Dog Disease which can Hit Humans in Iowa

Bayer says it is disappointed by Monday’s verdict and plans to appeal. Two other juries in March and last August awarded multimillion-dollar settlements to Roundup victims, and thousands of other cases are pending against the company.

The Wall Street Journal reports the price of shares in Bayer has dropped 30% since its first courtroom defeat in August. The newspaper also says shareholders are angered the German-based company bought Monsanto last year when it sells a product suspected of causing cancer. (VOA)