Why Most Cancer Isn’t Due To "Bad Luck" -Health & Beauty Informations. This article, entitled Why Most Cancer Isn’t Due To "Bad Luck", we have prepared this article carefully for you so you can retrieve information therein. Hopefully you understand the contents of this article that we put under the category health, well, happy reading.

Title : Why Most Cancer Isn’t Due To "Bad Luck"
link : Why Most Cancer Isn’t Due To "Bad Luck"

Why Most Cancer Isn’t Due To "Bad Luck"

A study published in Science in early 2015 reported that most cancers are not they can prevent and are simply a case of "bad luck". A year later, however, and a study published in the journal Nature has reached the opposite conclusion :. That external factors such as snuff, sunlight and human papillomavirus play a more important role in whether or not a person has cancer

divides the more often a cell, the greater the risk of mistakes that could cause cancer. Mopic / www.shutterstock.com

So what causes cancer: bad luck, or lifestyle and avoidable environmental factors

Why unlucky?

The study of "bad luck" for Tomasetti and Vogelstein of Johns Hopkins University, was based on two facts.

First, it is not the case that is equally likely to occur in all different body organs and tissues of cancer. Some cancers, such as colon cancer, are relatively common, while others, such as bone cancer, are much rarer, for reasons that the objective was discovered.

Second, the various tissue types have different numbers of dividing cells, called stem cells which serve to replace cells that have become old or damaged. How often these gap varies depending on which part of the body are and how often to be replaced cells.

According to one school of thought, arises when cancer stem cells out of control.

Each time a cell divides into two, one has to make an exact copy of your entire DNA. This copying process is usually accurate, but errors leading to spontaneous random mutations in the new cells can occur. When mutations in genes that keep cell division under control occur, the tumor suppressor work is avoided. The result is cancer.

and Vogelstein Tomasetti proposed that each time a cell in the inaccuracy random DNA copy is divided might lead to cancer-causing mutation. If individual cells divide more frequently, or if more dividing cells in general, then there is a greater likelihood of such mutations occurring.

behavior of stem cells from various tissues were looked at, and they looked at the number of stem cells and how often fall into life of a human being. Based on how these numbers vary for different tissues, it follows that the risk of developing a particular type of cancer was closely related to the number of times that the stem cells have been divided into that tissue. This reflects the "inherent danger" that frequently copy DNA carries.

Why environment?

In the latest study, researchers at Stony Brook University (SBU) in New York took another look at the data used by Tomasetti and Vogelstein. They found that, even when one considers the total number of stem cell divisions, some cancers were even more likely to occur than others. The most common cancers, it follows, must have some additional external cause, such as environment, lifestyle or genetic makeup.

When they reanalyzed the data on this basis, they found that for many cancers, including some of the most common, such as cancer lung and liver, less than 10% risk was attributable to random errors copy.

What to believe?

The two studies have much in common, but differ in the amount of intrinsic and extrinsic contribute to cancer risk. Note that the SBU team have supported their arguments with evidence that was not included in the study Tomasetti and Vogelstein.

First, the team SBU highlight the large amount of evidence pointing to a substantial contribution of environmental factors and lifestyle risk Of cancer. For example, it is well known that colon cancer is relatively rare in Japan, but Japanese immigrants in the US and their descendants have an even higher risk of colon cancer than Americans of European origin.

The SBU team also examined the types of mutations that lead various cancers. Some mutations are seen more often in tumors of older patients. This fits the model of "bad luck", where the key factors behind the occurrence of cancer are errors that accumulate each time a cell divides.

However, cancers also contain many other types of mutations that can occur due to specific carcinogens, for example, mutations sunlight induced in cancer skin. How often these changes occur much more cause cancer depends on the amount of exposure a person has to carcinogens, rather than age.

Finally, also showed that the error rate known to the copy of DNA is not high enough to be the only determining factor for the risk of develop cancers examined both teams.

Although we know what causes some cancers - such as smoking causes lung cancer - in many cases is more complicated than finding a cause simple. We're just kidding aside many of the factors involved. While chance plays a role in determining who gets cancer and who does not, it is very clear that the lifestyle, the environment and our genes may significantly change the odds.


Sarah Allinson , professor University of Lancaster

This article was originally published in Conversation . Read original article .

Thanks for Reading Why Most Cancer Isn’t Due To "Bad Luck"

Thank you for reading this Why Most Cancer Isn’t Due To "Bad Luck", hopefully can give benefits to all of you. well, see you in posting other articles.

You are now reading the article Why Most Cancer Isn’t Due To "Bad Luck" Url Address https://healthnbeautyarticles.blogspot.com/2016/02/why-most-cancer-isnt-due-to-luck.html