The origin of gold nanoparticles can be traced back to the 16th century. After Paracelsus created "drinking gold" to treat mental illnesses, nanogold entered the scientific scene. In 1857, When Faraday was studying Dalton's theory, he used gold chloride to reduce the solution containing nanometer gold, and found that adding a small amount of electrolytes could make the solution turn from ruby color to blue color and finally agglutinate to colorless, while adding gelatin and other macromolecules could prevent this change. In 1935, Edward et al., a surgeon in Chicago, discovered that nano-gold solution could effectively relieve patients' diseases and strengthen their physique. In 1971, Faulk used immunogold staining (IGS) for the first time to combine rabbit anti-salmonella antiserum with nano-gold particles, and used direct immunocytochemical technology to detect surface antigens of Salmonella, thus creating nano-gold immunolabeling technology.
1.Gold nanoparticles can be used for cancer detection
Gold nanoparticles can also be used to monitor early cancers, such as those of the brain, neck and mouth, sciencedaily reported. When injected into a patient's body, nanogold can stick to cancer cells and reflect light at certain wavelengths, so cancer cells can be identified without an MRI or CT scan.
2.Gold nanoparticles can be used in cancer chemotherapy
Conventional chemotherapy is known to harm both normal and immune cells. Gold nanoparticles can improve the effect of chemotherapy and reduce the side effects of chemotherapy, Xinhuanet.com reported. Because gold nanoparticles are easily absorbed by cancer cells, they can be coated with chemotherapy drugs so that they can be delivered to cancer cells. In addition, the heat can be used to kill cancer cells by heating nanogold that has entered them with infrared. Therefore, chemotherapy with nanogold can effectively kill cancer cells without harming normal cells.
3.Nanogold can be made into an injection
In addition to these USES, nano gold can also be made into injections. Nano-gold can adjust the electrolyte balance of cells and improve the body's immunity, according to a North Korean scholar, Chinanews.com reported. Because nano gold is very small, it will be distributed into the body immediately after injection and play its role quickly. It can restore immunity, relieve inflammation and pain, relieve nerves, improve brain function and blood circulation, etc.
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