Nanorobot medical kit
Unlike chemotherapy and radiation, the DNA nanorobots provide a nanorobot medical kit precise and targeted treatment method, destroying only the tumours by cutting off their blood supply, without harming the surrounding healthy tissue. A study with successful demonstration of the technology in mammals, using breast-cancer, melanoma, ovarian and lung-cancer mouse models, was published in the journal Nature Biotechnology.
A nanorobot refers to a system designed to perform a specific task at nanoscale dimensions. The DNA nanorobots provide a highly precise and targeted treatment method, destroying only the tumours by cutting off their blood supply. Surrounding health tissue is not harmed unlike in chemotherapy and radiation. This has been described as a milestone in the new field of nanomedicine, which seeks to use nanotechnology nanorobot medical kit create minuscule, molecule-sized nanoparticles to diagnose and treat difficult nanorobot medical kit, especially cancer.
The challenge is to design, build and carefully control nanorobots to actively seek and destroy cancerous tumours, while not harming any healthy cells.
The research was started five years ago, when NCNST researchers first looked at cutting off blood supply to tumours by inducing blood coagulation using DNA-based nanocarriers. Through the nanorobot medical kit with ASU, the nanomedicine design was upgraded to be a fully programmable robotic system, able to perform its mission entirely on its own. For the study the scientists used a well-known mouse tumour model, where human cancer cells are injected into a mouse to induce nanorobot medical kit tumour growth.
Nanorobots were deployed once the tumour was growing. Each nanorobot is made from a flat, rectangular DNA origami sheet, 90 nanometres by 60 nanometres in size. A key blood-clotting enzyme, called thrombin, is attached to the surface.
Nanorobot medical kit can block tumour blood flow by clotting the blood within the vessels that feed tumour growth, leading to tumour nanorobot medical kit death. An average of four thrombin molecules was attached to a flat DNA scaffold nanorobot medical kit the flat sheet was folded in on itself like a sheet of paper into a circle to make a hollow tube.
They were then injected into a mouse, where they travelled through the bloodstream looking for the tumours. To ensure nanorobot medical kit the nanorobots only attacked cancer cells, a special payload was included on the surface of the nanorobot, called a DNA aptamer. The DNA aptamer could specifically nanorobot medical kit a protein, called nucleolin, that is made nanorobot medical kit high amounts only on the surface of tumour endothelial cells and is not found on the surface of healthy cells.
The nanorobot was programmed to release its drug cargo inside the tumour and nanorobot medical kit the thrombin after binding to the tumour blood vessel surface. The nanorobots congregating in large numbers rapidly surrounding the tumour just hours after injection.
The treatment successfully blocked tumour blood supply and caused tumour tissue damage within 24 hours while having no effect on healthy tissues.
Being a natural biocompatible and biodegradable material, most of the nanorobots were cleared and degraded from the body after 24 hours. By two days, there was evidence of advanced thrombosis, and at the three-day point, thrombi in all tumor vessels were observed. There was no evidence of the nanorobots spreading into the brain where they could cause unwanted side effects, such as a stroke. In the melanoma mouse model, the median survival time more than doubled, extending from The system was also tested in a primary mouse lung-cancer model, which mimics the human clinical course of lung-cancer patients.
Shrinkage of tumour tissues was demonstrated after a two-week treatment. Nie Guangjun, professor at the NCNST and a key nanorobot medical kit of the collaborative team said that they are currently working with a biotech firm to do pre-clinical studies and hopefully translate the technology into a viable anti-tumour therapeutic.
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