The genetics of nicotine dependence: Relationship to pancreatic cancer

被引:20
作者
MacLeod, Stewart L.
Chowdhury, Parimal
机构
[1] UAMS, Coll Med, Dept Pediat, Arkansas Ctr Birth Defects Res & Prevent, Little Rock, AR 72202 USA
[2] Arkansas Childrens Hosp, Inst Res, Arkansas Ctr Birth Defects Res & Prevent, Little Rock, AR 72202 USA
[3] Univ Arkansas Med Sci, Dept Physiol, Little Rock, AR 72205 USA
关键词
smoking; pancreatic cancer; nicotine dependence; genetics; polymorphism; nicotine metabolism;
D O I
10.3748/wjg.v12.i46.7433
中图分类号
R57 [消化系及腹部疾病];
学科分类号
摘要
Smoking of tobacco products continues to be a major cause of worldwide health problems. Epidemiological studies have shown that tobacco smoking is the greatest risk factor for the development of pancreatic cancer. Smokers who are able to quit smoking can reduce their risk of pancreatic cancer by nearly 50% within two years, however, their risk of developing pancreatic cancer remains higher than that of non-smokers for 10 years. Nicotine is the major psychoactive substance in tobacco, and is responsible for tobacco dependence and addiction. Recent evidence suggests that individuals have genetically based differences in their ability to metabolize nicotine, as well as genetic differences in the psychological reward pathways that may influence individual response to smoking initiation, dependence, addiction and cessation. Numerous associations have been reported between smoking behavior and genetic polymorphisms in genes that are responsible for nicotine metabolism. In addition, polymorphisms in genes that encode neurotransmitters and transporters that function in psychological reward pathways have been implicated in differences in smoking behavior. However, there is a large degree of between-study variability that demonstrates the need for larger, well-controlled case-control studies to identify target genes and deduce mechanisms that account for the genetic basis of inter-individual differences in smoking behavior. Understanding the genetic factors that increase susceptibility to tobacco addiction may result in more effective tobacco cessation programs which will, in turn, reduce the incidence of tobacco related disease, including pancreatic cancer. (c) 2006 The WIG Press. All rights reserved.
引用
收藏
页码:7433 / 7439
页数:7
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