Genetic/familial factors
polymorphisms of genes that encode for enzymes, important
within the breakdown of tobacco-derived carcinogens, might play a
role within the development of lung cancer in female smokers and
never-smokers. n-acetyltransferase ( nat2 ) activity will modify
risk further as cytochrome p450 ( cyp ) cyp1a2 activity ( see
chapter four ). in chinese female nonsmokers, low nat2 activity
and fast cyp1a2 activity had an adjusted or of vi. nine compared
to high nat2 activity and slow cyp1a2 activity, making
them at higher risk of developing lung cancer. additionally, cyp1a1
could be associated with a rised risk of lung cancer in female
nonsmokers ( or three. 97 ; 95% confidence interval ci, one. 85
to seven. twenty eight ). 52 cyp1a1 is vital in converting tobacco carcinogens
into dna-binding metabolites vital in dna
adduct formation. glutathione s-transferase m1 ( gstm1 )
and t1 ( gstt1 ) are vital for detoxification of carcinogens.
gstm1 null genotype could be associated with a rised
risk of lung cancer in a few series however not in others. 52–55 one
study conducted among japanese ladies demonstrated an association
between gstm1 null genotype and also the increased
risk of lung cancer notably in lifetime nonsmoking women
with the null genotype and also the increased risk of lung cancer in
never-smoker ladies with the null genotype and significant
environmental tobacco smoke exposure ( or two. twenty seven ; 95% ci,
one. thirteen to two. seven ) compared with ladies while not the null genotype
and no significant environmental tobacco smoke ( ets ) exposure.
56 similar to gstm1, the null genotype of gstt1 has
shown a rised risk for the event of lung cancer in
never-smokers. 57
nitadori et al. 58 evaluated the association of lung cancer
incidence and family history within the japanese population. the
study found that ladies had higher risks of lung cancer if
a first-degree relative was diagnosed with lung cancer with a
hazard ratio ( hr ) of two. sixty five compared to similar men with an hr
of one. 69. alternative case-control studies found similar findings.
polymorphisms of genes that encode for enzymes, important
within the breakdown of tobacco-derived carcinogens, might play a
role within the development of lung cancer in female smokers and
never-smokers. n-acetyltransferase ( nat2 ) activity will modify
risk further as cytochrome p450 ( cyp ) cyp1a2 activity ( see
chapter four ). in chinese female nonsmokers, low nat2 activity
and fast cyp1a2 activity had an adjusted or of vi. nine compared
to high nat2 activity and slow cyp1a2 activity, making
them at higher risk of developing lung cancer. additionally, cyp1a1
could be associated with a rised risk of lung cancer in female
nonsmokers ( or three. 97 ; 95% confidence interval ci, one. 85
to seven. twenty eight ). 52 cyp1a1 is vital in converting tobacco carcinogens
into dna-binding metabolites vital in dna
adduct formation. glutathione s-transferase m1 ( gstm1 )
and t1 ( gstt1 ) are vital for detoxification of carcinogens.
gstm1 null genotype could be associated with a rised
risk of lung cancer in a few series however not in others. 52–55 one
study conducted among japanese ladies demonstrated an association
between gstm1 null genotype and also the increased
risk of lung cancer notably in lifetime nonsmoking women
with the null genotype and also the increased risk of lung cancer in
never-smoker ladies with the null genotype and significant
environmental tobacco smoke exposure ( or two. twenty seven ; 95% ci,
one. thirteen to two. seven ) compared with ladies while not the null genotype
and no significant environmental tobacco smoke ( ets ) exposure.
56 similar to gstm1, the null genotype of gstt1 has
shown a rised risk for the event of lung cancer in
never-smokers. 57
nitadori et al. 58 evaluated the association of lung cancer
incidence and family history within the japanese population. the
study found that ladies had higher risks of lung cancer if
a first-degree relative was diagnosed with lung cancer with a
hazard ratio ( hr ) of two. sixty five compared to similar men with an hr
of one. 69. alternative case-control studies found similar findings.
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