Cancer’s most deadly assassin exists in every cell
A kill code is embedded in every cell in the body whose function may be to cause the self-destruction of cells that become cancerous, reports a new Northwestern Medicine study. As soon as the cell’s inner bodyguards sense it is mutating into cancer, they punch in the kill code to extinguish the mutating cell.
The code is embedded in large protein-coding ribonucleic acids (RNAs) and in small RNAs, called microRNAs, which scientists estimate evolved more than 800 million years ago in part to protect the body from cancer. The toxic small RNA molecules also are triggered by chemotherapy, Northwestern scientists report.
‘Now that we know the kill code’
Cancer can’t adapt or become resistant to the toxic RNAs, making it a potentially bulletproof treatment if the kill code can be synthetically duplicated. The inability of cancer cells to develop resistance to the molecules is a first, the scientists said.
“Now that we know the kill code, we can trigger the mechanism without having to use chemotherapy and without messing with the genome. We can use these small RNAs directly, introduce them into cells and trigger the kill switch,” said lead author Marcus E. Peter, the Tomas D. Spies Professor of Cancer Metabolism at Northwestern University Feinberg School of Medicine.
Chemotherapy has numerous side effects, some of which cause secondary cancers, because it attacks and alters the genome, Peter said.
“We found weapons that are downstream of chemotherapy,“ noted Peter, also a member of the Robert H. Lurie Comprehensive Cancer Center of Northwestern University.
The paper describing the kill code and identifying how the cancer-fighting microRNAs use the code to kill tumor cells was published Oct. 29 in Nature Communications. The paper describing that protein-coding large RNAs can be converted into toxic small RNAs was published Oct. 16 in eLife.
Following nature’s lead
“My goal was not to come up with a new artificial toxic substance,” Peter said. “I wanted to follow nature’s lead. I want to utilize a mechanism that nature developed.”
In published research in 2017, Peter showed cancer cells die when he introduced certain small RNA molecules. He also discovered cancer cells treated with the RNA molecules never become resistant because the molecules simultaneously eliminate multiple genes cancer cells need for survival.
At the time, Peter said, “It’s like committing suicide by stabbing yourself, shooting yourself and jumping off a building all at the same time. You cannot survive.”
But he didn’t know what mechanism caused the cells to self-destruct. What he knew was a sequence of just six nucleotides (6mers) present in small RNAs made them toxic to cancer cells. Nucleotides are organic molecules that are the building blocks of DNA and RNA. They are G, C, A or T (in DNA), or U (in RNA).
In the first of the new studies, Peter then tested all 4,096 different combinations of nucleotide bases in the 6mers until he found the most toxic combination, which happens to be G-rich, and discovered microRNAs expressed in the body to fight cancer use this 6mer to kill cancer cells.
In the second new study, Peter showed the cells chop a gene (Fas ligand) involved in cancer cell growth into small pieces that then act like microRNAs and are highly toxic to cancer. Peter’s group found about three percent of all protein-coding large RNAs in the genome can be processed in this way.
“Based on what we have learned in these two studies, we can now design artificial microRNAs that are much more powerful in killing cancer cells than even the ones developed by nature,” Peter said.
The next step? “We absolutely need to turn this into a novel form of therapy,” Peter said. He is exploring multiple ways to trigger the embedded kill code to kill cancer cells, but stressed a potential therapy is many years off.
The Latest on: Cellular kill code
via Google News
The Latest on: Cellular kill code
- The best Android VPN apps 2021on February 19, 2021 at 5:45 am
As well as helping use the web securely – particularly if you’re using public Wi-Fi or cellular – Android ... considerations are tight security - a kill switch is handy, so that you're ...
- Two coronavirus variants have merged to create a HYBRID – everything you need to knowon February 18, 2021 at 4:51 am
TWO coronavirus variants have merged, scientists say, raising concerns about the course of the virus’ evolution. The hybrid formed when the Kent and Californian variants combined by infecting one ...
- Ask Hackaday: Does Your Car Need An Internet Killswitch?on February 15, 2021 at 3:59 pm
Combine this with Bluetooth, WiFi, and cellular connectivity — it’s unlikely ... cybersecurity are present on the open road. Flawed code is everywhere, and it’s unrealistic to believe ...
- Insight about tumor microenvironment could boost cancer immunotherapyon February 15, 2021 at 8:03 am
"Cancer cells don't just starve T cells that would kill them but actually feed these ... the researchers found that silencing the gene that codes for the MCT1 protein caused tumor growth to ...
- Is There a Cure for Aging?on February 14, 2021 at 12:37 am
To eliminate not merely diseases that kill people, but to prevent death itself. Hacking the Code for Immortality ... s lives and actually improve cellular aging. Some of the biggest payoffs ...
- How was a COVID-19 vaccine found so quickly?on February 9, 2021 at 4:52 am
A retrovirus is a virus that copies its genetic code and integrates it into the ... but it also has so-called cellular immunity, which is led by T-cells, and that’s much harder to study and ...
- How to Improve Mobile Signal Strengthon February 8, 2021 at 4:55 pm
That would kill your battery. So sometimes ... Phone cases, by the way, are designed not to block cellular signal, but removing the case from your phone can't hurt. If you've been with your ...
- RFID News Roundupon February 4, 2021 at 4:01 am
Sense BLE products offer a communication distance of up to 200 meters (656 feet) and can link to Wi-Fi, LAN or cellular networks ... including a Unique Tap Code that makes messages unique and dynamic.
- How To Protect your Android Device with Surfshark VPNon February 2, 2021 at 3:00 am
When people think about viruses, they usually think about malicious strings of code that will infect their ... someone they do when they are using cellular towers instead of WiFi networks.
via Bing News