Why quitting smoking is not easy, scientists have found. The study was conducted by a number of experts from the University of Michigan.

For their experiments, scientists used roundworms belonging to the species Caenorhabditis elegans.. They first made them addicted to nicotine, and then deprived them of this substance, and watched their reactions..

As a result of research, scientists have identified a number of genes that are responsible for the increased production of nicotinic receptor proteins.. It turned out that they are the key factor in the formation of nicotine addiction..

Experimental worms showed a reaction that is usually inherent in mammals. Scientists believe that the results of their research can be used to study the dependence of people on nicotine. It was previously thought that these genes had no effect on nicotine addiction..

The researchers also found that individual components of tobacco smoke can change the functioning of the protein " As a result, genes become vulnerable to mutations accumulating there.. This is considered one of the most likely causes of the development of oncology in smokers with experience..

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