Gold salts have been used for a long time to treat arthritis, although how it worked or more pertinently, if it worked, was unclear. Injecting gold salts for inflamed and swollen rheumatic joints took weeks to work and often had nasty side effects: rashes, mouth ulcers, impaired kidney function and sometimes bone marrow depression. My pharmacology professor in medical school taught us the only thing gold was good for as a drug was "itchy palm disease." Now the chief of rheumatology at Duke, DAvid Pisetsky, is telling us we shouldn't be so dismissive:
"We scientists have really never understood why gold works. Now that we have a better handle on its action, we may be able to use that mechanism to create new and better gold-like drugs to treat arthritis."
Pisetsky had long been interested in a particular molecule, HMBG1, which provokes inflammation, the key process underlying the development of rheumatoid arthritis. HMBG1 is a dual-function molecule, which means that it behaves one way when it's inside the nucleus of a cell, and quite another way when it's released from the cell.
Pisetsky says that inside the nucleus, HMGB1 is a key player in transcription, the process that converts genetic information in DNA to its RNA equivalent. But when HMGB1 is released from the cell -- either through normal processes or cell death -- it becomes a stimulus to the immune system and enhances inflammation. (here and here). So a more efficient gold salt analog for rheumatoid arthritis might not be so wonderful.
Meanwhile, there's always itchy palm disease.
Not me Revere. I am allergic to gold of all kinds. Imagine the tears of my bride the day of our wedding when I put the ring on not knowing. Six hours later with my finger turning purple the doc in the ER had to cut it off with the help of a hospital maintenance man and a pair of bolt cutters. I was rashed for two weeks and hives for most of that time. Finger took a month to get to where I could bend it again.
I know the guy who ran a small molecule screen for inhibitors of antigen-MHC II interaction, and found that heavy metals (including gold and platinum) has this activity. His paper was published in Nature Chemical Biology.
I blogged about his work early last year.
His work got pretty good coverage including an article in The Economist.
I posted an answer for you, but the spam filter didn't like my two links.
Coloidal Gold has been around for awhile.
I may have to revisit the substance again.
helps the electrical system