Smoking Affects DNA Methylation
Where scientists once thought the genes you were born with were the genes you were stuck with throughout life, now they have identified changes to your DNA, called methylation, that affect how your genes are expressed or may modify the way those genes affect your health.
The development of some health conditions are affected by your genetics. In some cases, DNA methylation will tell your genes to turn “off,” effectively changing how your body responds to the environment. DNA methylation is a signaling tool used for gene expression that’s vital to a number of cell process that control human disease.6
Although scientists are still working to understand the complexities of how DNA methylation and genetic expression are connected, they have identified this connection in the development of cancer (although, as explained in previous articles, genetic changes that contribute to cancer are typically downstream effects ofmetabolic dysfunction, not the original cause).7
Smoking Changes Your DNA and Increases Your Risk of Disease
Researchers have known that smoking alters your DNA methylation, but this recent study demonstrates how long those changes last and how widespread they may be.8 Lead researcher Dr. Stephanie London, chief of the Epidemiology Branch at the National Institute of Environmental Health Sciences in Research Triangle Park, told Reuters:9
“We don’t really know whether it means ‘damage’ to the DNA. That requires more study, using data outside what we have here. What we’re saying is that it’s a change to your DNA that can have a downstream effect on what genes are expressed at what levels.”
However, any change to your DNA by toxic substances may be considered damage. The amount of damage and the consequences for that damage is where researchers will be focusing further study. This study combined data from a set of participants from 16 other studies, using blood samples from over 15,000 people.
The team compared the samples from current smokers to former smokers and those who said they had never smoked.10 People who were currently smoking had over 2,500 genetic changes to their DNA.
After a smoker quits, much of the DNA changes revert back to their original state, but some remain changed even decades later. The researchers found 185 locations that were significantly different between people who formerly smoked and those who had never smoked.
DNA Methylation Affects Development of Cancers
and Chronic Diseases
Smoking changes your DNA methylation, affecting your gene expression. Researchers have linked these changes in gene expression from methylation to both the development of cancers and the expression of cardiovascular disease.11,12,13,14
London, quoted in Medical News Today, expressed her concern over the long-term effects smokers may experience:15
“These results are important because methylation, as one of the mechanisms of the regulation of gene expression, affects what genes are turned on, which has implications for the development of smoking-related diseases.
Equally important is our finding that even after someone stops smoking, we still see the effects of smoking on their DNA.”
Only now are other long-term health conditions associated with prenatal or early postnatal exposure to cigarette smoke. Children exposed to smoke have increased risk of behavioral and developmental problems including attention deficit disorder (ADD) and other conduct disorders.19
Other studies demonstrate links between prenatal smoking exposure and the development of cardiovascular disease, obesity and diabetes in adulthood.20 Further studies specifically link nicotine exposure to long term health conditions in children.
You Absorb Nicotine From the Air ThroughYour Skin
Breathing secondhand smoke triggers health conditions much like if you were smoking yourself. Exposure to smoke led researchers to question if the only way your body absorbed nicotine was through inhaling. Could you absorb the chemicals through your skin?
Nicotine patches are used to help smokers control their urge to smoke and theoretically help them stop smoking. In this case, the chemical is placed directly against the user’s skin and held in place with a patch. Is it possible to absorb nicotine from the air as well?
Findings from a new study demonstrate that your body can absorb nicotine from secondhand smoke or wearing clothes that have been exposed to smoke.22
These results are especially important for children and teens who are exposed to smoking or vaping. Charles Weschler, Ph.D., co-author of the study and chemist at Rutgers University, was quoted in Science News for Students, saying:23,24
“If you’re in a room where smoking or vaping is occurring, you’re taking in the smoke through your skin as well as your lungs.”
Researchers found the dose absorbed by the participants was not trivial and amounted to the same as smoking between 0.5 and six cigarettes. Lead researcher, Gabriel Beko, Ph.D., civil engineer from the Technical University of Denmark, said this was about as much as you could expect to inhale in a smoky room.25
This means the amount of smoke you may be absorbing from a smoky room is greater than the chemicals you’re inhaling. Researchers also found that wearing clothing that was exposed to smoke also increases your absorption of nicotine.
If You Want to Quit Smoking, Do This First
I believe the “secret” to quitting smoking is to get healthy first, which will make quitting much easier. Exercising is part and parcel of this plan, as research shows people who engage in regular strength training double their success rate at quitting smoking compared to those who don’t exercise.48 Healthy eating is another crucial aspect that can’t be ignored. In short, if you want to quit, here are the three basic tips to get you started:
- Read through dr. Joseph Mercola comprehensive free nutrition plan to get started eating right.
- Develop a well-rounded exercise regimen. It is your ally to fighting disease and to quitting smoking. Strength training is an important part, but also remember to incorporate high-intensity interval exercises like Peak Fitness, core-strengthening exercises, stretching and regular non-exercise movement (like walking and cutting back on sitting).
- Find a healthy emotional outlet. Many people use exercise, meditation or relaxation techniques for this, and these are all great. Incorporate the Emotional Freedom Techniques (EFT). This can help clear out emotional blockages from your system (some of which you might not even realize are there), thus restoring your mind and body’s balance and helping you break the addiction and avoid cravings.
Once you are regularly doing these three things, then you can begin to think about quitting smoking. At this point many are ready to try quitting “cold turkey.” Predict your urge to smoke, and preplan healthier alternatives and distractions. Finally, if you’re a parent, talk with your children about the risks of smoking, smokeless tobacco and e-cigarettes. The easiest pathway to not smoking is to avoid starting in the first place.
article source: http://www.mercola.com
Important note: *I am not a doctor and these statements have not been evaluated by the Food and Drug Administration. The products or services promoted on this website are not intended to diagnose, treat, cure, or prevent any disease. You need to do your own research.