Posts

How Your Lifestyle Can Affect Genes That Cause Cancer

There are two schools of thinking about cancer.  School one says that cancer is a hereditary disease, passed from generation to generation.  A good example of this are women who possess the BRCA1 and BRCA2 gene mutation.  Women with this mutation have a 70% lifetime risk of developing breast and/or ovarian cancer.  Angelina Jolie, for example, lost her mother and aunt to cancer and was subsequently found to have the same mutation.

The second school says that cancer can occur due to lifestyle choices.  A good example of this is cigarette smoking. It is the number cause of lung cancer, linked to 80 – 90% of lung cancer cases.

Recently, researchers at the Boston University School of Medicine have introduced another theory about the development of cancer.  They proposed that there are processes within our cells that activate certain sequences of DNA.  Those processes act as on/off switches for the development of cancer.

This idea is based on the evolving science of epigenetics. Epigenetics looks at the way genes express or don’t express themselves as we age.  Those gene changes are thought to be influenced directly as a result of our nutrition and behavior, as well as exposure to toxins in our environment.  In a sense, it’s a hybrid of hereditary disease and lifestyle choices.

Epigenetics is a normal process in our bodies.  For example, all of our DNA is the same, yet cells develop into liver cells, brain cells, muscle cells, etc. because of the way epigenetics turns on and off different cell processes.  But our lifestyle choices can impact the way genes express themselves as well.

Perhaps you’ve heard the expression “Sitting is the new smoking.”  The reason for this is due to research on lifestyle and cancer.  The results of dozens of surveys found that a sedentary lifestyle increases the risks of cancer, specifically colon cancer.  Subjects who spent most of their day sitting were 24% more likely to get colon cancer.  People who watched the most television had a 54% greater risk than those who watched fewer hours.  Uterine cancer was also affected by sitting; women who were the most inactive experienced a 32% great risk.  The female T.V. watchers fared worse; those who watched the most television has a 66% risk of developing uterine cancer.

In all these cases, it’s not the inactivity per se that causes cancer to develop.  It’s the processes of epigenetics that are affected by inactivity that can cause cancer.

It’s a complicated and exciting time.  Next month, more on how unhealthy habits are incorporated into our DNA and passed onto our children.


Sources:

https://blogs.scientificamerican.com/guest-blog/lifestyle-choices-could-affect-gene-sequences-that-code-for-cancer/

http://www.nature.com/scitable/topicpage/epigenetic-influences-and-disease-895

http://www.whatisepigenetics.com/fundamentals/2/

Reducing Your Risk of Cancer

The American Institute for Cancer Research (AICR) estimates that approximately one-third of cases of the most common cancers in the U.S. could be prevented, which accounts for about 374,000 cases of cancer per year. Cancer prevention is action taken to lower the chance of getting cancer therefore reducing the burden and deaths from cancer each year. Since February is Cancer Prevention Month, we wanted to highlight some ways to reduce your risk and protect yourself from cancer.

1. Eat a healthy diet & Stay active

Eating a balanced plant-based diet filled with a variety of vegetables, fruits, soy, nuts, whole grains, and beans can help lower your risk for many types of cancer and will help you maintain a healthy weight.

Adults should get et at least 150 minutes of moderate intensity or 75 minutes of vigorous intensity activity each day (or a combination of these), preferably spread throughout the week. While children and teens are recommended to get at least 1 hour of moderate or vigorous intensity activity each day, with at least 2.5 hours of moderate intensity aerobic activity each week.

2. Protect yourself from the sun

Sun exposure at any age can cause skin cancer. Be especially careful in the sun if you burn easily, spend a lot of time outdoors, or have any of the following physical features:

  • Numerous, irregular, or large moles
  • Freckles
  • Fair skin
  • Blond, red, or light brown hair

To block UV rays try covering-up, wearing sunscreen, wearing a hat, using UV-absorbent shades, and limiting you exposure time.

3. Get immunized

The human papillomavirus (HPV) vaccine helps prevent most cervical cancers and several other kinds of cancer, and the hepatitis B vaccine can help lower liver cancer risk.

4. Avoid risky behavior

Another effective cancer prevention tactic is to avoid risky behaviors that can lead to infections that, in turn, might increase the risk of cancer. Some behaviors to avoid:

  • Excessive alcohol consumption
  • Tanning beds
  • Tobacco use
  • Unsafe sex
  • Sharing needles

5. Get regular medical care and screenings

Along with regular check-ups with your physician to maintain an open health dialogue, cancer screenings should also be scheduled. These include the following:

  • Pap smear – Most women ages 21 to 65 should get Pap tests as part of routine health care. Even if you are not currently sexually active, you should still have a Pap test
  • Colonoscopy – Colon cancer screening should begin at age 50 for most people. If a colonoscopy doesn’t find adenomas or cancer and you don’t have risk factors, the next test should be in ten years.
  • Mammogram – Women should should get mammograms every year starting at age 40, for as long as a woman is in good health
  • Checking skin for irregular moles, etc.

Sources:

https://www.cdc.gov/cancer/dcpc/prevention/

http://www.mcancer.org/cancer-prevention

http://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/cancer-prevention/art-20044816

https://www.osha.gov/Publications/OSHA3166/osha3166.html