title: Relationship between drug-induced interstitial lung diseases and cytochrome P450 polymorphisms.
abstract: OBJECTIVE
  Interstitial lung disease and especially drug-induced interstitial lung disease can occur as a cause of drug(s) or drug-drug interactions. In this review we summarize the possible role of cytochrome P450 (CYP) enzymes in drug-induced interstitial lung disease.
  
  
  RESULTS
  The CYP enzyme family plays an important role in the metabolism of all sorts of ingested, injected or inhaled xenobiotic substances. Although the liver is considered to be the major metabolism site of CYP enzymes, in recent years more CYP isoforms have been detected in lung tissue. Polymorphisms in these CYP genes can influence the metabolic activity of the subsequent enzymes, which in turn may lead to localized (toxic) reactions and tissue damage.
  
  
  CONCLUSIONS
  Drug toxicity can be the consequence of no or very poor enzyme activity, especially if no other metabolic route is available. In the case of reduced enzyme activity, dose reduction or prescribing an alternative drug metabolized by a different, unaffected CYP enzyme is recommended to prevent toxic side effects. Therefore, knowing a patient's CYP profile before drug prescription could be a way to prevent drug-induced interstitial lung disease. Moreover, it might be helpful in explaining serious adverse effects from inhaled, injected or ingested xenobiotic substances.
authors.affiliation: Department of Clinical Chemistry, ild care center, Maastricht University Medical Centre, Maastricht, The Netherlands.
authors.forename: Petal A H M
authors.initials: PA
authors.lastname: Wijnen
authors.forename: Otto
authors.initials: O
authors.lastname: Bekers
authors.forename: Marjolein
authors.initials: M
authors.lastname: Drent
mesh_terms: D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004358:Drug Therapy; D006801:Humans; D017563:Lung Diseases, Interstitial / Q000139:chemically induced*; D010597:Pharmacogenetics; D011110:Polymorphism, Genetic / Q000235:genetics*; D012307:Risk Factors; D015262:Xenobiotics / Q000009:adverse effects*
chemical_list: D015262:Xenobiotics; D003577:Cytochrome P-450 Enzyme System