Posting in Cancer
Lung cancer news: Cheek swab for lung cancer and how smoking causes epigenetic changes.
It turns out cancer can be detected far away from the site of the tumor. This is called field effect.
Looking for these nanoscale changes might be helpful in screening other types of cancers such as colon and pancreatic cancers as well.
Traditionally, the microscopes used can only see microscale changes in the cells. The researchers used partial wave spectroscopic (PWS) microscopy to see smaller changes that the conventional microscopes miss.
When the cell structure changes, light scatters through it differently.
This is why the researches believe this is a huge step in showing what biomedical optics can do for personalized screening. The team of researchers from New York University, Northwestern University, and NorthShore University Health System published their clinical study in the journal Cancer Research.
Essentially, the scientists took cheek swabs and shined a light on the cells. Scientists used the PWS microscope to tell which people had lung cancer by looking at the differences in the cells.
Not only can nanocytology help detect cancer early, it can shed light on the fact that these small changes in the cell structure are very telling.
Changes in the DNA are also very revealing. For decades, scientists have known that smoking causes cancer because it damages the DNA. Now British researchers have uncovered the link between smoking and epigenetic changes in DNA.
"Until now, however, there has been no direct evidence that smoking induces DNA methylation in humans," Cancer Research UK Institute of Cancer Studies Dr Yuk Ting Ma said in a statement. "DNA methylation is a type of epigenetic change that can result in tumor suppressor genes being inactivated."
In other words, smoking can change how genes are expressed without changing the actual sequence.
My colleague Dana Blankenhorn has been covering smoking extensively. He discussed how third hand smoke is a problem, especially when cyanide and arsenic stays in furniture and clothes. Blankenhorn also wrote about the electronic cigarettes scam and why the Food and Drug Administration wants them to be approved as drug delivery devices.
The numbers are telling: The Centers for Disease Control and Prevention warns that "more people die from lung cancer than any other type of cancer."
Medicare has an idea that paying seniors to stop smoking might help.
Related on SmartPlanet:
- Breath test can detect cancer
- Device can test for drugs in your breath
- Chemists create a better artificial nose to sniff out explosives and sour milk
- Custom-made, plastic antibodies could fight off infections and allergies
Oct 11, 2010
Dana is full of hops! There is probably more cyanide and arsenic in your drinking water than in his imaginary "third hand smoke." If that concept won't show the raving anti-smoking zealot for what he is I don't know what will. "Third hand smoke" is the most asinine thing those goons have come up with yet! How to hell did all of us that made it through the 50's ever survive? Why people must have been dropping over in the streets before the all-knowing anti-smoking cartel came into being! Use a little common sense for Chris'ts sake!
I have stopped wasting my time reading Dana's leftist lectures. However, since you quoted Dana in her article I had to verify that the name matched the mug shot and the typical content. Dana you didn't let me down. If you start to follow in Dana's footsteps I may as well point this email to my spam folder.