Self-regulating nanoparticles' can be made just hot enough to kill cancer
By Maria Cohut Published Wednesday 13 December 2017
英国萨里大学(University of Surrey)和中国大连理工大学(Dalian University of Technology)的研究人员最近在《纳米尺度》(Nanoscale)杂志上发表了一篇关于这一突破的报告。
'Self-regulating nanoparticles' can be made just hot enough to kill cancer
By Catharine Paddock PhD Published Wednesday 25 October 2017
Researchers have developed a new type of nanoparticle that allows itself to be heated up to a temperature that kills cancer cells, but not so high as to harm healthy tissue.
cancer cells 3d
Self-regulating nanoparticles could revolutionize thermal therapy for cancer.
In a report about the breakthrough recently published in the journal Nanoscale, researchers from the University of Surrey in the United Kingdom and Dalian University of Technology in China describe how they developed and tested the "self-regulating" nanoparticle.
Nanotechnology allows scientists to manipulate materials at the level of atoms and molecules at a scale measured in nanometers, or billionths of a meter. It is the scale at which the most basic units of biology and life operate. For instance, a strand of DNA is 2 nanometers thick.
Hyperthermia, or thermal therapy, is a type of treatment that uses heat to shrink or destroy tumors without harming healthy tissue. Its use is not widespread, and it is most often given in conjunction with other treatments, such as radiation therapy and chemotherapy.
When it was first suggested as a treatment for cancer around 30 years ago, hyperthermia was received with much enthusiasm.
However, interest in hyperthermia soon waned as practical problems began to emerge, including the difficulty of precisely controlling the temperature of the target tissue.
Optimal temperature range
The researchers behind the new study explain that the optimal temperature range for hyperthermia to be effective as a cancer treatment is between 42°C and 45°C (108°F and 113°F). Keeping the temperature in this range can weaken or kill cancer cells without harming healthy tissue.
"If we can keep cancer treatment sat at a temperature level high enough to kill the cancer, while low enough to stop harming healthy tissue," explains senior author Prof. Ravi Silva, head of the Advanced Technology Institute at the University of Surrey, "it will prevent some of the serious side effects of vital treatment."
Magnetic nanoparticles are tiny particles that respond to a magnetic field — for example, by getting hot. Researchers have recognized their potential for use in cancer hyperthermia; they could be sent to specific targets in the body and then heated up by applying a magnetic field outside the body.