Abstract:
:Smoking is the main risk factor for COPD (chronic obstructive pulmonary disease) but genetic factors are of importance, since only a subset of smokers develops the disease. Sex differences have been suggested both in disease prevalence and response to environmental exposures. Furthermore, it has been shown that acquisition of 'addiction' to smoking is partly genetically mediated. Disease cases and smoking habits were identified in 44919 twins aged >40 years from the Swedish Twin Registry. Disease was defined as self-reported chronic bronchitis or emphysema, or recurrent cough with phlegm. The results showed that chronic bronchitis seems to be more prevalent among females, and that the heritability estimate for chronic bronchitis was a moderate 40% and only 14% of the genetic influences were shared by smoking. In addition, 392 twins have been invited to a clinical investigation to evaluate: (i) to what extent genetic factors contribute to individual differences (variation) in FEV(1) (forced expiratory volume in 1 s), vital capacity and DL(CO) (diffusion capacity), taking sex into consideration, and (ii) whether smoking behaviour and respiratory symptoms influence these estimates.
journal_name
Biochem Soc Transjournal_title
Biochemical Society transactionsauthors
Svartengren M,Engström G,Anderson M,Hallberg J,Edula G,de Verdier MG,Dahlbäck M,Lindberg CM,Forsman-Semb K,Nihlén U,Fehniger TEdoi
10.1042/BST0370814subject
Has Abstractpub_date
2009-08-01 00:00:00pages
814-8issue
Pt 4eissn
0300-5127issn
1470-8752pii
BST0370814journal_volume
37pub_type
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